Abstract:
Disclosed is a drainage canal structure, and in particular is a prefabrication type drainage canal structure which makes it possible to prevent a transformation and disengagement of a drainage canal in such a way that a plurality of drainage canal bodies each equipped with a waveform reinforcing unit are assembled in series, and a protection net is arranged over the drainage canal bodies which are buried underground, and a side reinforcing unit is installed into the ground so that a bottom foundation can be expanded, and the drainage canal bodies can be fixed in place on the ground. Trees, gravels, etc. can be prevented from penetrating into the drainage canal bodies thanks to the protection net. The drainage canal structure with an increased self-weight can be provided, which can keep it in place. Work and construction time can be saved because the drainage canal structure can be manufactured on the spot.

Description:
BACKGROUND 
       [0001]    The present invention relates to a drainage canal structure, and in particular to a prefabrication type drainage canal structure which makes it possible to prevent a transformation and disengagement of a drainage canal in such a way that a plurality of drainage canal bodies each equipped with a waveform reinforcing unit are assembled in series, and a protection net is arranged over the drainage canal bodies which are buried underground, and a side reinforcing unit is installed into the ground so that a bottom foundation can be expanded, and the drainage canal bodies can be fixed in place on the ground. Trees, gravels, etc. can be prevented from penetrating into the drainage canal bodies thanks to the protection net. The drainage canal structure with an increased self-weight can be provided, which can keep it in place. Work and construction time can be saved because the drainage canal structure can be manufactured on the spot. 
         [0002]    Drainage canals are installed in roads, mountains, rivers, etc. or in an agricultural drainage canal, an industrial complex, a housing complex, etc. in order to guide the flows of rain water and drainage water. 
         [0003]    More specifically, the above mentioned drainage canals are installed at a bottom of a mountain ridge, a water guide canal, a rain water guide canal, etc. in an attempt to guide rain water or draining water. 
         [0004]    The above mentioned drainage canals can be manufactured in a shape of blocks each with a certain length in such a way to cast concrete on the spot (hereinafter referred to a casting work on the spot) or to use a prefabricated concrete block or a synthetic resin. 
         [0005]    In most of drainage canals, water is guided to flow inwards over the side walls of the drainage canals; however the water, sometimes, does not flow into the drainage canals due in part to the difference in the physical properties between the concrete and the synthetic resin. 
         [0006]    If water flows long through the drainage canals, the synthetic resin may decompose and may be broken because the drainage canals made from the synthetic resin is directly exposed to sunshine. 
       SUMMARY OF THE INVENTION 
       [0007]    Accordingly, it is an object of the present invention to provide a prefabrication type drainage canal structure which is invented so as to resolve the problems occurred when the conventional drainage canals heave due to rain water or the original ground moves away, and which makes it possible to prevent the loss of the original ground on which the drainage canals are constructed and to prevent the loss of the installed drainage canal structure. The drainage canal structure can be manufactured on the spot, and a simplified manufacture procedure and a stable assembling structure can be obtained in the present invention. 
         [0008]    To achieve the above objects, there is provided a prefabrication type drainage canal structure equipped with a drainage canal body with a channel shaped vertical cross section and installed at a drainage carnal formed on the ground of a cutting area, which comprises a plurality of protrusion type waveform reinforcing units which are formed at regular intervals on at least one of an outer surface, an inner surface and both the inner and outer surfaces of the drainage canal body, a plurality of reinforcing units which are installed in a row at regular intervals traversing the interior of the drainage canal body, and a plurality of through holes which are formed at regular intervals at the tops of both sides of the drainage canal body. 
         [0009]    The present invention is directed to a drainage canal structure whose transportation and installation work can be easy, and it can be easily assembled on the spot, and a transformation due to the pressure of surrounding soil can be prevented by forming a waveform reinforcing unit on an outer surface of a drainage canal body. When a drainage canal structure is installed at the drainage canal which is disposed underground, it is possible to prevent gravels from entering the drainage canal body by providing a protection net, thus preventing the clogging of the drainage canal body. The whole weight of the drainage canal structure can be increased by filling with soil the empty space from the outer tops of the drainage canals to the bottoms of the drainage canals including an assistant water way for thereby preventing the transformation and heaving of the drainage canals. 
         [0010]    In addition, an eco-corridor for the sake of wild animals can be secured because a protection net is provided over the tops of the drainage canals, so the wild animals are not allowed to enter the drainage canal body, which leads to protection of wild animals. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]    The present invention will become better understood with reference to the accompanying drawings which are given only by way of illustration and thus are not limitative of the present invention, wherein; 
           [0012]      FIG. 1  is a perspective view illustrating a prefabrication type drainage canal structure according to the present invention; 
           [0013]      FIG. 2  is a view illustrating a state that a prefabrication type drainage canal structure is installed at a drainage canal according to the present invention; 
           [0014]      FIG. 3  is a view illustrating a state that a protection net is removed from a prefabrication type drainage canal structure according to the present invention; 
           [0015]      FIG. 4  is a front view illustrating a prefabrication type drainage canal structure of  FIG. 3 ; 
           [0016]      FIG. 5  is a view illustrating a state that a drainage canal body and a cover unit are separated in a prefabrication type drainage canal structure according to the present invention; 
           [0017]      FIG. 6  is a view illustrating a state that an angle unit is assembled to a drainage canal unit of a prefabrication type drainage canal structure according to the present invention; 
           [0018]      FIG. 7  is a cross sectional view illustrating a state that a screw bolt is engaged to an angle unit of a prefabrication type drainage canal structure according to the present invention; 
           [0019]      FIG. 8  is a view illustrating a state that a wire anchor is engaged to an angle unit of a prefabrication type drainage canal structure according to the present invention; 
           [0020]      FIG. 9  is a view illustrating a state that a protection net is engaged in a prefabrication type drainage canal structure according to the present invention; 
           [0021]      FIG. 10  is a front view illustrating a state that a protection net is engaged in a prefabrication type drainage canal structure according to the present invention; 
           [0022]      FIG. 11  is a perspective view illustrating a drainage canal structure according to the present invention; 
           [0023]      FIG. 12  is a cross sectional view illustrating a drainage canal structure of  FIG. 11 ; 
           [0024]      FIG. 13  is an enlarged view illustrating a through hole of a portion “A” of a drainage canal structure of  FIG. 11 ; 
           [0025]      FIG. 14  is a perspective view illustrating a state that an upper reinforcing plate is installed at a guide unit of a drainage canal structure according to the present invention; 
           [0026]      FIG. 15  is a cross sectional view illustrating a portion “B” of a drainage canal structure of  FIG. 14 ; 
           [0027]      FIG. 16  is a perspective view illustrating a state that a protection net is installed over the tops of the drainage canal bodies of a drainage canal structure according to the present invention; 
           [0028]      FIG. 17  is a cross sectional view illustrating a state that a reinforcing unit is installed in a drainage canal body in a drainage canal structure according to the present invention; 
           [0029]      FIG. 18  is a view illustrating a state that a drainage canal structure is installed at a drainage canal of a drainage canal structure according to the present invention; 
           [0030]      FIG. 19  is a perspective view illustrating a plurality of drainage canal structures are connected in a drainage canal structure according to the present invention; 
           [0031]      FIG. 20  is a cross sectional view illustrating a portion “C” of a drainage canal structure of  FIG. 19 ; 
           [0032]      FIG. 21  is an enlarged view illustrating portions “F” and “G” of a drainage canal structure of  FIG. 20 ; 
           [0033]      FIG. 22  is a cross sectional view illustrating a portion “D” of a drainage canal structure of  FIG. 19 ; 
           [0034]      FIG. 23  is a cross sectional view illustrating a portion “E” of a drainage canal structure of  FIG. 19 ; 
           [0035]      FIG. 24  is a perspective view illustrating a drainage canal structure which is last connected when connecting a plurality of drainage canal structures according to the present invention; 
           [0036]      FIG. 25  is a cross sectional view illustrating a portion “H” of a drainage canal structure of  FIG. 24 ; 
           [0037]      FIG. 26  is a perspective view illustrating a pressure-resistant reinforcing plate of a drainage canal structure of  FIG. 24 ; 
           [0038]      FIG. 27  is a perspective view illustrating a drainage canal structure in which a waveform reinforcing unit is formed at a drainage canal body of a drainage canal structure according to the present invention; 
           [0039]      FIG. 28  is a cross sectional view illustrating a drainage canal structure of  FIG. 27 ; 
           [0040]      FIG. 29  is a perspective view illustrating a guide unit of a drainage canal structure according to the present invention; 
           [0041]      FIG. 30  is a side view illustrating a drainage canal structure of  FIG. 27 ; 
           [0042]      FIG. 31  is an enlarged view illustrating a portion “A” of a drainage canal structure of  FIG. 30 ; 
           [0043]      FIG. 32  is an enlarged view illustrating a portion “B” of a drainage canal structure of  FIG. 30 ; 
           [0044]      FIG. 33  is a view illustrating a shape of a waveform reinforcing unit of a drainage canal structure according to the present invention; 
           [0045]      FIG. 34  is a perspective view illustrating a drainage canal structure in which an engaging bar and a reinforcing piece are installed according to the present invention; 
           [0046]      FIG. 35  is a front view illustrating a drainage canal structure in which an engaging bar and a reinforcing piece of  FIG. 34  are installed; 
           [0047]      FIG. 36  is a view illustrating a state that an engaging bar and a reinforcing piece are installed in a drainage canal structure of  FIG. 34 ; 
           [0048]      FIG. 37  is a perspective view illustrating a state that a side reinforcing plate is installed at a drainage canal structure in which an engaging bar and a reinforcing piece are installed in a drainage canal structure according to the present invention; 
           [0049]      FIG. 38  is a projected view illustrating a state that a side reinforcing plate is installed at a drainage canal structure in which an engaging bar and a reinforcing piece are installed in a drainage canal structure of  FIG. 37 ; 
           [0050]      FIG. 39  is a front view illustrating a state that a side reinforcing plate is installed at a drainage canal structure in which an engaging bar and a reinforcing piece are installed in a drainage canal structure of  FIG. 37 ; 
           [0051]      FIG. 40  is a perspective view illustrating a state that an outer reinforcing member is installed at a drainage canal body of a drainage canal structure according to the present invention; 
           [0052]      FIG. 41  is a side view illustrating a drainage canal structure of  FIG. 40 ; 
           [0053]      FIG. 42  is a side view illustrating a state that a plurality of through holes are formed at the tops of side surfaces of a drainage canal body of a drainage canal structure of  FIG. 40 ; 
           [0054]      FIG. 43  is a front view illustrating a state that an outer reinforcing member is installed at a drainage canal body of a drainage canal structure of  FIG. 40 ; 
           [0055]      FIG. 44  is a view illustrating a structure of an outer reinforcing member of a drainage canal structure of  FIG. 40 ; 
           [0056]      FIG. 45  is a perspective view illustrating a state that an inner reinforcing member is installed at a drainage canal body of a drainage canal structure according to the present invention; 
           [0057]      FIG. 46  is a front view illustrating a state that an outer reinforcing member is installed at a drainage canal body of a drainage canal structure of  FIG. 45 ; and 
           [0058]      FIG. 47  is a perspective view illustrating a state that a connection bar is installed at an inner side of an outer reinforcing member of a drainage canal body of a drainage canal structure according to the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0059]    The preferred embodiments of the present invention will be described with reference to the accompanying drawings. 
         [0060]    The drainage canal structure according to the present invention has features in that a drainage canal structure can be manufactured on the spot and can be installed in an easier way as compared with the conventional art in which the drainage canal structure is manufactured at a factory and is transported from the factory to the spot of the construction. 
         [0061]    In addition, the present invention makes it possible to guide the flow of water by installing a drainage canal structure at a drainage canal so as to prevent rain water or drainage water from flowing into the ground or onto the ground wherein the drainage canal where the drainage canal structure of the present invention is installed is provided at the ground near a cutting area, a river or an agricultural field so as to guide the flow of rain water or drainage water. 
         [0062]    As shown in  FIGS. 1 to 6 , the present invention is directed to a prefabrication type drainage canal structure  100 ′ which is installed at a drainage canal  10 ′ formed on the ground of a cutting area and comprises a drainage canal body  200   a ′ which is installed in the drainage canal  10 ′ and is formed of a plurality of winkled units  210 ′ protruding from its outer surface at regular interval, and a cover unit  300 ′ which covers the tops of the drainage canal body  200   a ′ and at both sides of which is respectively provided an upside down channel shaped angle unit  310   a ′ for thereby engaging both ends of the top of the drainage canal body  200   a ′ and which comprises a plurality of connection plates  320 ′ disposed at regular intervals in a longitudinal direction of the side portion of an angle unit  310   a ′ for thereby connecting the angle units  310   a ′ of both sides. 
         [0063]    As shown in  FIGS. 6 and 7 , the upside down channel shaped angle unit  310   a ′ is installed at both ends of the top of the drainage canal body  200   a ′. The angle unit  310   a ′ comprises a horizontal part  311 ′ formed at the top and a vertical part  312 ′ of one side or the other side vertically connected to both ends of the horizontal part  311 ′. An engaging unit  313 ′ passes through the vertical part  312  of the one side. At the vertical part  312 ′ of the other side is formed an insertion unit  314 ′ which faces the engaging unit  313 ′ of the vertical part of the one side and has a diameter two times the diameter of the engaging unit  313 ′. At both ends of the top of the drainage canal body  200   a ′ is provided an engaging unit  211 ′ which communicates with the engaging unit  313 ′ and the insertion unit  314 ′. 
         [0064]    The screw bolt  50   a ′ is inserted through the insertion unit  314 ′ of the angle unit  310   a ′ and passes through the engaging unit  211 ′ of the drainage canal body  200   a ′ and comes into close contact with the engaging unit  313 ′ of the angle unit  310   a ′, so the angle unit  310   a ′ of the cover unit  300 ′ is engaged to both ends of the top of the drainage canal body  200   a′.    
         [0065]    As shown in  FIG. 8 , an anchor pin  410 ′ is planted into the ground of the bottom of the drainage canal  10 ′ in a diagonal direction outside the drainage canal body  200   a ′. There is further provided a wire anchor  400 ′ formed of a wire  420 ′engaged to the screw bolt  50   a ′ which protrudes from one side of the angle unit  310   a ′ of the cover unit  300 ′, for thereby preventing the drainage canal body  200   a ′ mounted in the drainage canal  10 ′ from disengaging. 
         [0066]    The anchor pin  410 ′ is formed of a flat plate whose vertical cross section is a V-shape. A through hole  412 ′ is formed at a wing unit  411 ′. The wire anchor  400 ′ is formed in an upward direction as the wire  420 ′ is connected through the through hole  412 ′. 
         [0067]    As shown in  FIGS. 9 and 10 , there is further provided a protection net  500 ′ which is covered over the top of the cover unit  300 ′, which makes it possible to prevent the impurities contained in rain water and wild animals from entering the drainage canal body  200   a′.    
         [0068]    The end portion of the protection net  500 ′ is engaged, using a welding method or a bolt  50   b ′ whose head is a circular dish shape, to the top of the cover unit  300 ′, more specifically, the horizontal part  311 ′ of the angle unit  310   a ′ of the cover unit  300 ′, so people are interrupted when they pass by. 
         [0069]    According to another embodiment of the present invention, as shown in  FIGS. 11 to 23 , there is provided a prefabrication type drainage canal structure  100  which has a drainage canal body  200  installed at a drainage canal disposed on the ground of a cutting area and having a channel shaped vertical cross section, which comprises horizontal wing pieces  250  which extend in longitudinal directions from the tops of both sides of the drainage canal body  200 ; and a plurality of reinforcing units  220  which are arranged at regular intervals traversing both sides of the drainage canal body  200 . 
         [0070]    As shown in  FIG. 11 , the channel shaped drainage canal body  200  may be manufactured in such a way that a flat steel plate is bent in a channel shape or a flat steel plate is connected in series by a welding in a channel shape. 
         [0071]    As shown in  FIG. 16 , a horizontal wing piece  250  may be prolonged in a longitudinal direction from the tops of both sides of the drainage canal body  200 , and the plate shaped wing piece  250  is connected in a longitudinal direction to the tops of both sides of the drainage canal body  200 . The guide unit  270  is mounted on the top of the wing piece  250  for thereby reinforcing the wing piece  250 , and the top of the drainage canal  200  is covered by a net shaped protection net  300 . Both ends of the protection net  300  surface-contact with the guide surface  271  of the guide unit  270  mounted on the top of the wing piece  250  and are engaged thereto using one of a screw, a piece, a rivet or a bolt and a nut, so only rain water can pass thanks to the net shaped protection net  300 , but gravels or impurities cannot pass through the protection net  300 . 
         [0072]    As shown in  FIG. 17 , a plurality of reinforcing units  220  partitioning at regular intervals the inner space of the drainage canal body  200  are provided in rows while traversing the same for thereby preventing any transformation of the drainage canal body  200  when soil pressure is applied thereto as it is installed at a drainage canal. The above mentioned reinforcing units  220  are provided in multiple rows and in multiple tier structures at regular intervals in the interior of the drainage canal structure  100  because it is impossible for the reinforcing units  220 , which used to be conventionally installed in one row, to endure the soil pressure or the internal pressure of the drainage canal body  200  (more specifically, the pressure which is inwardly applied due to the weight of the flat plate of both sides of the drainage canal) as the size of the drainage canal body  200  changes based on the width of the drainage canal, and the width and depth of the inner side of the drainage canal increase. 
         [0073]    The size of the drainage canal body  200  changes based on the volume of the drainage canal. At this time, the reinforcing units  220  each spaced apart at regular intervals while traversing from both sides of the inner space of the drainage canal body  200  are installed in multiple rows based on the size of the drainage canal body  200 , thus keeping stably the drainage canal body  200 . 
         [0074]    The reinforcing units  220  of the present invention are provided so as to keep stability based on the size of the drainage canal body  200 ; however they are not limited to the construction shown in the drawings. 
         [0075]    The reinforcing unit  220  can be manufactured in a circular rod shape, a plate shape, etc. and is not limited to its shape. It is provided for the purpose of reinforcing the inner structure of the drainage canal body  200 . 
         [0076]    As shown in  FIGS. 19 to 21 , when the reinforcing units  220  are installed in the upper, inner side of the drainage canal body  200 , the engaging surface of the guide unit  270  surface-contacts with the inner side surface of the drainage canal body  200  and then is engaged to the same using a bolt and a nut or a rivet. At this time, the bolt and nut or rivet are integrally engaged to the engaging surface  272  of the guide unit  270  and one end of each of the reinforcing units  220 . When a drainage canal structure  100  is connected to another drainage canal structure  100 , one end of the drainage canal structure  100  of one side is mounted and folded on the inner surface of one end of the drainage canal structure  100  of the other side. The surface-contacting portions are engaged using a bolt and a nut or a rivet. At this time, the engaging surface  272  of the guide unit  270  is integrally engaged to one end of each of the reinforcing units  220 , so the side surfaces of the folding drainage canal structures  100  are integrally engaged. 
         [0077]    As shown in  FIGS. 11 and 13 , at the tops of both sides of the drainage canal body  200  is provided a drainage canal structure  100  in which there are provided a plurality of through holes  230  which are spaced apart in longitudinal directions at regular intervals. 
         [0078]    Since there are installed a plurality of through holes  230  which are formed on the tops of both sides of the drainage canal body  200  in longitudinal directions at regular intervals, the rain water which is inputted along with soil and sand from both sides of the drainage canal can be inputted through the through holes  230  for thereby preventing the collapse of the soil and sand of both sides wherein the drainage canal body  200  is installed at a drainage canal. 
         [0079]    The through holes  230  protrude outwards from the side surfaces of the drainage canal body  200  and are formed in a protruded triangle shape when viewing from the front of the drainage canal structure  100 . The rain water flowing in from the side surfaces of the drainage canal moves into the interior of the drainage canal body  200  through the through holes  230  and flows along. 
         [0080]    In addition, instead of using the above mentioned shape of the through hole  230 , an oblique shape or projecting shape through hole  230  may be provided so as to prevent the clogging when rain flows in through the through holes  230  which are cut away in an oblique shape from the side surfaces of the drainage canal body  200 . 
         [0081]    As shown in  FIGS. 11 ,  12  and  29 , there may be provided a horizontal flat shape guide surface  271  formed in a longitudinal direction at each of the tops of both sides of the drainage canal body  200 , and a guide unit  270  which is formed of an engaging surface  272  bent from an end portion of the guide surface  271  in a vertical direction and extending from the same. The guide unit  270  is installed at the top of each of both sides of the drainage canal body  200 . In the above mentioned structure, one surface of the engaging surfaces  272  of the guide unit  270  comes into surface contact with one surface of the top of the drainage canal body  200  and is engaged by a screw, a piece, a bolt and a nut or a rivet, so the guide unit  270  is engaged to each of the tops of both sides of the drainage canal body  200 . 
         [0082]    As shown in  FIG. 16 , both ends of the protection net  300  surface-contacts with the guide surface  271  of the guide unit  270  for thereby covering the tops of the drainage canal body  200 , and both ends of the protection net  300  which surface-contacts with the guide surface  271  of the guide unit  270  are engaged using a screw, a piece, a bolt and a nut or a rivet for thereby finishing an installation at the drainage canal. 
         [0083]    One end of the guide surface  271  of the guide unit  270  is engaged as the engaging surface  272  bent and extending long in a vertical direction surface-contacts with a side surface of the inner side of the drainage canal body  200 , and the other end of the guide surface  271  of the guide unit  270  is short in a vertical direction, more specifically, is shorter than the length of the engaging surface  272  and surface-contacts with the end portion of the wing piece  250  of the drainage canal body  200 , so the guide unit  270  surface-contacts with the wing piece  250  of the drainage canal body  200  and does not escape. 
         [0084]    As shown in  FIGS. 14 ,  15  and  16 , there are provided a plurality of upper reinforcing plates  280  which are spaced apart at regular intervals and traverse the engaging surface  272  of the guide unit which surface-contacts with the tops of the wing pieces  250  of both sides of the drainage canal body  200  before the net shaped protection net  300  is installed. Here, the net shaped protection net  300  is installed at regular intervals over the tops of the upper reinforcing plates  280  disposed at regular intervals and traversing the engaging surface  272  of the guide unit  270  engaged to the tops of the wing pieces  250  formed at both sides of the drainage canal body  200 , and the drainage canal structure  100  is provided over the top of the net shaped protection net  300  and is strong enough for people to step on. 
         [0085]    As shown in  FIGS. 27 to 33 , there are provided a plurality of wave-shaped reinforcing units  210  which are formed at regular intervals on an outer surface, an inner surface or both outer and inner surfaces of the drainage canal body  200 . The wave-shaped reinforcing units  210  which protrude at regular intervals on an outer surface, an inner surface or both inner and outer surfaces of the drainage canal body  200  is strong like the drainage canal body formed in a flat plate structure. Thanks to the wave-shaped reinforcing units  200 , it is possible to prevent any transformation due to external impacts in the middle of manufacture or construction. In addition, it is possible to prevent any transformation of the drainage canal structure  100  due to the soil pressure in the interior of the drainage canal when it is installed at a drainage canal for thereby enhancing a physical property of the structure. 
         [0086]    The shape of the wave-shaped reinforcing unit  210  may be a semicircular shape, an inverted triangle shape or a quadrangle shape. Such shapes do not limit the scope of the present invention. It may be formed in various shapes. 
         [0087]    As shown in  FIGS. 30 ,  31  and  32 , when interconnecting the drainage canal structures  100 , a plate shaped first assembling unit  240   a  extending with a certain is formed at one side of the inner surface of the drainage canal body  200 . There is provided a plate shaped second assembling unit  240   b  extending with a certain width wider in such a way that the width of the other side of the inner surface is wider as compared with the width of the first assembling unit  240   a  formed at one side of the drainage canal body  200 . 
         [0088]    When the drainage canal structures  100  are interconnected and assembled, they are assembled in such a way to be folded at both ends of the assembled drainage canal body  200 . When assembling in such a way to be folded, the first assembling unit  240   a  of the end portion of the drainage canal body  200  of one side is folded on the second assembling unit  240   b  of the end portion of the drainage canal body  200  of the other side and is engaged thereto by a screw, a piece, a bolt and a nut or a rivet for thereby withstanding the soil pressure which is transferred to the leakage prevention and engaging portions for thereby preventing any transformation and leakage of the drainage canal structure  100 . 
         [0089]    As shown in  FIGS. 11 and 12 , a plurality of steel angle-shaped lateral side reinforcing plates  260  are provided at regular intervals in longitudinal directions at both sides of the drainage canal body  200 . The lateral side reinforcing plates  260  are engaged at both sides of the drainage canal body  200  using a bolt and a nut, a screw, a piece or a rivet. Since the side lateral reinforcing plates  260  are provided, the drainage canal body can be disposed in place on the bottom of the drainage canal for thereby preventing the disengagement of the same and any transformation of both side surface of the drainage canal body  200  due to the soil pressure of the inner side of the drainage canal. 
         [0090]    As shown in  FIGS. 19 ,  23  to  26 , a plurality of the drainage canal structures  100  are interconnected in a longitudinal direction of the drainage canal. A channel shaped and plate shaped pressure-resistant plate  290  is installed at an inner surface of one end of the drainage canal body  200  having the other side to which is not connected the drainage canal body  200  which is opposite to one side to which is connected the drainage canal structure  100 , which is connected first or last, more specifically, is connected the drainage canal bodies  200 . The pressure resistant reinforcing plate  290  is installed at an inner surface of one end of the drainage canal body  200  so as to prevent one side end of the drainage canal from being transformed by the soil pressure at both sides of the drainage canal structure  100 , as a result of which any transformation of the drainage canal body  200  can be prevented. 
         [0091]    As an engaging means, a bolt and a nut, a screw, a piece or a rivet is not limited thereto. Any engaging means which provides a stable engagement or disengagement can be used. 
         [0092]    As shown in  FIGS. 34 to 36 , instead of the reinforcing unit  200 , there may be provided a drainage canal structure  100  which comprises an engaging bar  300  which has a laid channel-shaped cross section and is vertically installed facing both inner sides of the drainage canal body  200  and is formed of a fixing surface  301  surface-contacting with one side of the interior of the drainage canal body  200  and having a plurality of through holes  303  arranged at regular intervals, and an engaging surface  302  having a second through hole  304  which can communicate as it is bent in the directions of both sides of the fixing surface  301 ; and a pair of plate-shaped reinforcing pieces  310  which are arranged in a X-shape traversing in an oblique direction in relation with the engaging bar  300  formed at both sides of the interior of the drainage canal body  200  and which each have a third trough hole  311  at both ends and are engaged with a bolt  40  and a nut  55  or a rivet while communicating with the second through hole  304  of the engaging bar  300 . 
         [0093]    The engaging bars  300  are installed facing each other at both sides of the interior of the drainage canal body  200 . When the engaging bar  300  is installed in the interior of the drainage canal body  200 , the fixing surface  301  of the engaging bar  300  is vertically fixed at one side of the interior of the drainage canal body  200  using a bolt  50  and a nut  55  or a rivet inserted through the first through hole  303  formed at the fixing surface  301  of the engaging bar  300 . The engaging bar  300  has the same length as the height of one side surface of the interior of the drainage canal body  200 . 
         [0094]    The engaging surface  302  is bent and extends from both sides of the fixing surface  301  of the engaging bar  300 , and the engaging bar  300  has a laid channel shaped cross section. The second through holes  304  arranged at regular intervals are formed at both sides of the engaging surface  302 . 
         [0095]    The engaging piece  305  extends upward from the top of the engaging surface  302  of the engaging bar  300 . Since the fixing surface  301  connecting the engaging pieces  305  of both sides is absent at the engaging piece  305 , the engaging piece  305  directly surface-contacts with the engaging surface  272  of the guide bar  270  covering both ends of the top of the drainage canal body  200 , so the engaging bar  300  can be stably engaged to the interior of the drainage canal body  200  while providing aesthetic exterior. 
         [0096]    As shown in  FIG. 36 , a pair of reinforcing pieces  310  are installed in a X-shape traversing in an oblique direction in relation with the engaging bar  300  which is installed facing each other in the interior of the drainage canal body  200 . One end of the reinforcing piece  310  with a third through hole  311  formed at its both ends passes through the second through hole  304  of the engaging surface  302  for the reinforcing pieces  310  to be fixed at the engaging surface  302  of the engaging bar  300  and is fixed using a bolt  50  and a nut  55  or a rivet. 
         [0097]    Since the reinforcing pieces  310  are installed traversing the engaging bars  300  which are installed at both sides of the interior of the drainage canal body  200  in an X-shape. The drainage canal body  200  is installed at a drainage canal of a cutting area so that any distortion used to happen due to the soil pressure buried at both outer sides of the drainage canal body  200  does not occur in the drainage canal body  200  for thereby providing a stable support force against the soil pressure. 
         [0098]    As shown in  FIG. 36 , there is provided a drainage canal structure which is engaged with a bolt  50  and a nut  55  or a rivet wherein a fourth through hole  312  is formed at one surface where the reinforcing pieces  310  cross in a X-shape and surface-contact. 
         [0099]    As shown in  FIGS. 37 to 39 , a plurality of steel angle-shaped side reinforcing plates  260  are installed at regular intervals in longitudinal directions at both sides of the drainage canal body  200 . When the side reinforcing plates  260  are assembled to a side portion of the drainage canal body  200 , the fixing surface  301  of the engaging bar  300  surface-contacts with the inner side of the drainage canal body  200  and is fixed at the inner side of the drainage canal body  200  through the first through hole  303  of the fixing surface. At this time, the bolt  50  passes through the first through hole  303  formed at the bottom of the fixing surface  301  and though one surface of one inner side of the drainage canal body  200  and through one surface of the side reinforcing plate  260  and is engaged with a nut  55 , so one surface of the inner side of the drainage canal body  200  and one surface of the side reinforcing plate  260  are integrally engaged with a bolt  50  and a nut  55  or a rivet. 
         [0100]    The side reinforcing plate  260  of the drainage canal body  200  where the engaging bar  300  is installed, is installed at an inner side of the drainage canal body  200 . There is provided a drainage canal structure  100  in which a side reinforcing plate  260  is further installed at one surface of the outer side of the drainage canal body  200  so as to obtain more stable engaging force by which to prevent the disengagement of the drainage canal structure  100  in the drainage canal. 
         [0101]    As shown in  FIGS. 4 to 42 , there is provided an outer reinforcing member  32  which has features in that a side support bar  321  is vertically fixed in a longitudinal direction at both outer sides of the drainage canal body  200 . A bottom support bar  322  surface-contacts with the lower end of the side support bar  321  and is horizontally fixed at the bottom of the outer side of the drainage canal body  200  and extends in the direction of both sides of the drainage canal body  200 , and a slope bar  323  is installed at a certain slope at one surface of the bottom support bar  322  on one surface of the side support bar  321 . 
         [0102]    The side support bar  321  of the outer reinforcing member  320  is vertically installed at an outer surface of the drainage canal body  200  and is fixed at a side surface of the drainage canal body  200  with a bolt and a nut, a rivet or a piece. The lower end of the side support bar  321  is fixedly engaged to one surface of the bottom support bar  322  and is attached to the bottom of the outer lower side of the drainage canal body  200  and is fixed with a bolt and a nut, a rivet or a piece. 
         [0103]    The side support bar  321  and the bottom support bar  322  of the outer reinforcing member  320  are fixed at both side surfaces and the bottom of the drainage canal body  200 , respectively, for thereby more stably keeping the structure of the drainage canal body  200  (preventions of distortion and bending of the drainage canal body). A slope bar  23  is installed at a certain slope at one surface of the bottom support bar  322  in one surface of the side support bar  321  so as to provide a resistance force against the soil pressure at the outer sides of the drainage canal body  200  before and after the construction for thereby resolving the problems related with the soil pressure. 
         [0104]    A plurality of outer reinforcing members  320  are installed at an outer surface of the drainage canal body  200  for thereby more stably supporting the drainage canal body  200 . 
         [0105]    The side support bar  321  of the outer reinforcing member  320  is vertically installed in consideration of the configuration of the drainage canal body  200 ; however it is obvious that the side support bar  321  of the outer reinforcing member  320  is sloped at a certain angle when both sides of the drainage canal body  200  are sloped at certain angles. 
         [0106]    In addition, a plurality of the outer reinforcing members  320  are installed at an outer surface of the drainage canal. When it is installed at a drainage canal of a slope area, it is possible to increase the friction force with the ground thanks to the outer reinforcing member  320 , so the drainage canal body  200  is not slipped or disengaged from the ground for thereby accurately installing the drainage canal body  200  at the drainage canal in the middle of the construction. In addition, it is possible to keep the drainage canal body  200  in place in the drainage canal after the construction. 
         [0107]    According to another embodiment of the present invention, as shown in  FIG. 42 , there is provided a drainage canal structure comprising a plurality of through holes arranged at regular intervals in longitudinal directions at the tops of both sides of the drainage canal body  200  of  FIG. 40 . Since a plurality of the through holes  230  are arranged at regular intervals in longitudinal directions at the tops of both sides of the drainage canal body  200 , the drainage canal body  200  can be stably installed at the drainage canal, so the rain water flowing in along with the soil and sand from both sides of the drainage canal is guided to flow through the through holes  230  for thereby preventing the collapses of the soil and sand of both sides of the drainage canal. 
         [0108]    As shown in  FIGS. 45 and 46 , a plurality of inner reinforcing members  330  are installed at regular intervals at the inner surface of the drainage canal body  200  wherein the inner reinforcing member  330  is formed as the connection bars  331  are connected in quadrangle shapes for the same to surface-contact with the inner surface of the drainage canal body  200  and to be fixed. 
         [0109]    The inner reinforcing member  330  has features in that the connection bars  331  looking like a straight line are connected in a quadrangle shape, and the inner reinforcing member  330  formed in the quadrangle shape surface-contacts with a circumferential surface of the drainage canal body  200  and is fixed with a bolt and a nut, a rivet or a piece. 
         [0110]    The connection bars  331  forming both sides and the bottom of the inner reinforcing member  330  are fixedly installed surface-contacting with both inner surfaces and inner bottom of the drainage canal body  200 . 
         [0111]    As shown in  FIG. 47 , there is further provided a connection bar  331  connecting the connection bars  331  of both sides to the inner side of the connection bar  331  at both sides in the inner reinforcing member  330  for thereby supporting the external impacts against the intermediate portions of both sides of the drainage canal body  200 . 
         [0112]    In the drainage canal body  200  which comprises a pair of reinforcing pieces  310  arranged in a X-shape traversing in an oblique direction in relation with the engaging bars  300  which face each other or in the drainage canal body  200  equipped with the outer reinforcing member  320  or in the drainage canal body  200  equipped with the inner reinforcing member  330 , a plurality of through holes  230  may be installed at regular intervals in longitudinal direction at the tops of both sides of the drainage canal body  200 , and a guide unit  270  is installed in a longitudinal direction at the tops of both sides of the drainage canal body  200  and comprises a horizontal flat plate shaped guide surface  271  and an engaging surface  272  vertically bent and extending from both ends of the guide surface  271 , and a mesh shaped protection net  300  may be installed so as to cover the top of the drainage canal body  200 , and a plurality of steel angle shaped side reinforcing plates  260  may be installed in longitudinal directions at both sides of the drainage canal body  200 , and a plurality of upper reinforcing plates  280  may be connected at regular intervals traversing the engaging surface  272  of the guide unit  270  formed at both sides of the drainage canal body  200 . 
         [0113]    As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described examples are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.