PREFABRICATED CONCRETE TANKS

Abstract: Three kinds of reinforced concrete prefabricates, two of them being interdependent (A and B) and one (C) of universal use for the realization of side and partition walls of tanks. All components are provided with metal resting means which are to interact, in the installation phase, with a metal foundation component in order to simplify their installation. A double elastic gasket hydraulic sealing system, of neoprene or similar gives the structure non rigid connections and therefore the feature of absorbing, without damage, even exceptional loads. Additions can be directly connected to existing structures.

Description: Prefabricated concrete tanks, The present invention concerns a considerable improvement by means of prefabricated reinforced concrete components of peri etrical and partition walls of tanks of any dimen¬ sion and shape, particularly suited for the realization of water treatment systems. Furthermore, the object of the present invention may be also used in the realization or storage bins, support walls, docks, margin defences etc. The most considerable market portion consists in above mentioned system for the purification of the waste waters and for the treatment of the primary waters, which all re¬ quest tanks and basins particularly diversified, having complex structures, a perfect hydraulic sealing and very oftenly need a further enlargment.- Up to now, the prior art discloses three kinds of construc¬ tive techniques for the realization of the water purifica¬ tion and treatment systems , which are: 1) traditional construction: the walls are built in site, casting the reinforced concrete into wood or metal cais- sons comprising the reinforcment wires previously prov¬ ided. It is known that this process is slow and subject to all inconveniences concerning a working in the open and in more or less difficult areas; the quality of the reinforc¬ ed concrete is difficult to control (almost never the granulometric curve of the used inerts is appropriate, nor the cement proportions, particularly when the concre¬ te is provided by local beton plants); after the dismant¬ lement, the walls have to be whitewashed due to the de¬ fects of the caissons as well as oftenly to hide the "smockings" that arose in the casting but, most of all, to improve the hydraulic sealing which, in any case, is always a big problem. In fact, due to different reasons, flaws and/or smali damages may arise following to thermal phenomena or to the sinking of the ground or to the not correct placing • of the flexible coupling etc. Even if it is true that the quality of these works is proportional to the re¬ liability/extension of the performing firm, these works are usually entrusted, apart from the costs, to medium- small local firms. In spite of above mentioned inconveniences, this is the most used building technique. 2) A partially prefabricated or mixed construction. This system is used where it is impossible to find a com¬ plete series of prefabricated elements that may respond to the plans: therefore, a part of those elements will have to be realized according to the conventional sy¬ stem. Therefore, the factor advantages/disadvantages directly depends on the quantity relationship between those elements performed according to one or another technique. However, at least for what concerns the part realized according to the conventional system, above mentioned inconveniences may arise. 3) Construction with reinforced concrete prefabricated elements; this constructive technique is used when the requested prefabricated elements are available within 150 ÷ 300 km, said elements being interdepen¬ dent so as to form a complete "system" that will meet all requests of the plans. At present, a plurality of prefabricate systems are known showing, all of them, more or less valid solutions but in any case all showing considerable advantages with respect to the conventional construction mentioned in 1). The first of these advantages consists in the extremely short times requested for the delivery of the finished works; the second advantage concerns the quality of the product which, being realized in a plant doesn't need, after the installation, any finishing whitewash nor any waterproofing material. Also under the economical point of view, the "prefabri- cated" is profitable with respect to the "conventional" if the distance from the production centre to the instal¬ lation place is not above the one already mentioned, The limits in the advantage in which the "prefabrication" consists are given by the considerable incidence of the transport costs: with an increasing distance the conve- niency gradually decreases until it is completely anulled; and this is the main reason why the conventional construc- tive technique is still so much in use. • The production centres of such prefabricate systems being really efficient are not widely spread and in some areas they are not present at all. As this does not depend on a lacking request (and this is prooved by the still abun - dant use of the conventional construction system), the reasons are to be found in a plurality of causes, the main of which are: a) a prefabricate process consisting in an excessive πum- ber of components, like e.g.: one "wall element" when the tank is placed not in earth (only the push of the water on one side of the wall); a second "wall element" when the tank, is completely placed in earth (push on both sides of the wall); a third "wall element" for the realization of internal or partition walls, etc. .. A similar situation arises for the special components, needed for the joints (unions) of the "wall elements", i.e. angle elements, T-shaped elements, cross-shaped elements, etc. Each kind of "wall elements" needs a specific series of special components. Therefore, it may be easily understood that the multiplication of the "wall elements" means an increase of the special components, and consequently higher costs for the production equipment purchase. Furthermore, it should be underlined that the higher the number of the spe- cial elements to be realized, the less the series pro¬ duction thereof, with always increasing disadvanta¬ ges for the productivity. b) the installation takes place in the conventional way, i.e. placing the reinforced concrete elements on a bed of mortar. This means that each single element must be aligned, "plumbed", placed "at level", etc; said necessary as well as laborious operations have a considerable influence on the installation times and therefore on the costs (machines like a crane, trans¬ port means, etc). Considering it from a productive point of view, this corresponds to the technique of the "brick on brick". c) Excessively heavy prefabricated elements for the pro¬ ductive system with horizontal caissons (molds) (it is already known how this system does not allow to 5 - define the structure of an element provided with groo¬ ves on both sides), as well as because in some cases the element is realized with a part of the foundation at the foot thereof, while in other cases it is realiz- ed with the so called "holes"-system. In any case, it is impossible to obtain the best relationship between dimension and weight. d) The vertical connection between one element and the o- ther, obtained by means of an additional concrete (or special mortar) casting for cementing the irons and/or the metal blades projecting from the elements in the connection points; this operation is performed after the installation, and therefore requests further time (beyond operative disadvantages), but most of all it confers to the structure an excessive stiffness which will lead, in the long run, vertical flaws probably caused by a plurality of phenomena (dilatations, micro gives in the foundation, etc.). e) The hydraulic sealing, in correspondence with the ver¬ tical connections of the prefabricated, obtained by means of silicone products: without any doubt it is a very quick process, but in the long run it prooves to be unreliable because said products are subject to ageing (particularly if for any reason the tanks are empty for a long period. f) The impossibility of performing future enlargements, i.e. to realize further adjacent tanks, without pre¬ viously performing expensive regain, demolition and/or remaking operations, because the used elements were not provided for this purpose. g) Unlikeliness in the finishing degree of the fronts of the wall elements due to the horizontal casting production system, which means that the front obtain- ed by the caisson (the lower one) is perfectly fini¬ shed while the other one, the upper one, has an ap¬ proximate finishing degree and in any case unlike the other; to this disadvantage the one of the essential manual intervention shall be added. h) Oftenly the production of the prefabricate elements takes place in a specific plant, wherein this fact requests considerable economical investments which heavily increase the final cost of the product. Therefore, an optimal process for the realization of the prebabricate elements for above mentioned purposes must solve above listed disadvantages and have the following features: 1) this prefabricate process shall consist in hot more than three elements, prefabricate in reinforced con¬ crete, having a plurality of functions and suitable for the realization of inner and outer walls of tanks of any shape and of any height; 2) the installation shall be quick, precise and safe, which means that it shall be based on an innovator technique; 3) the prefabricate elements shall have such a structure as to offer the greatest guarantee of statics and func¬ tionality but, at the same time, they must be extremely light, exactly because of their structural features; all surfaces must have the same finishing degree with¬ out the need of any manual " intervention.; 4) the vertical connection (union) between one element and the other shall be obtained by means of an elastic and not by means of a rigid system and without the need of any additional concrete (or special mortar) castings after their placing; 5) the hydraulic sealing shall be guaranteed by a system free from-ageing phenomena and able to assure the great¬ est functionality, even in presence of casual deforma¬ tions of the walls; 6) the prefabricate elements shall have such a structure as to allow, in any moment, the addition of further tanks placed nearby to those previously realized, with¬ out the need of performing particular works; 7) for an economical advantage, the production of said prefabricate elements shall not require the installa¬ tion of a new plant, but said production shall be per¬ formed, following to a previous convention, in alrea- dy working plants producing other kinds of prefabrica¬ tes; the result is that while the owner of the pre¬ fabricate plant may add to his production new, inte¬ resting productive and commercial opportunities, the investment costs are limited to the ones strictly con- cerning the specific equipment, as the general infra¬ structures are already existing (concrete mixing e- quipment, concrete feeding means, lifting means and other systems). Above mentioned purposes are reached by means of an im¬ proved process according to the present invention, con¬ sisting of the following components shown in the enclos¬ ed drawings: - a prefabricate element A of reinforced concrete with a large surface (wall element), shown in figure I; - a prefabricate element B of reinforced concrete, hav¬ ing a. plurality of functions and being interdependent with said element A, shown in figure II; - a prefabricate element C of reinforced concrete, of universal use and therefore independent from said e- lements A and B, shown ih figure III; - a metal device for the automatic centring-aligπmeπt-le- velling, for the support and the temporary hooking of the prefabricate elements A, B and C, shown in figures IV and V; - a system for a non rigid connection between one prefa¬ bricate element and the other consisting of a double elastic neoprene or similar gasket for the hydraulic sealing. All prefabricate elements A, B and C have the interface sides shaped in male and female with vertical grooves for the housing of the elastic gaskets and are provided for the mechanical locking of the same. Beyond said joint system for the connection and the hy¬ draulic sealing, said prefabricate elements A, B and C have in common: - metal resting means for the quick installation thereof on device A; - the bivalence In use for the realization of perimetri- cal and inner walls; - surfaces with an identical' finishing degree obtained by means of a vertical casting; - a particularly reduced weight due to their specific structural features; - the possibility of increasing the number of tanks also in different time periods, and in any direction, mak- ing use of the already existing walls, without the need of expensive demolition and/or take-up works. Hereinbelow the features of above mentioned elements will be described more in detail according to the already men¬ tioned drawings. Element A shall be considered a wall element; the height thereof is determined by the height of the finished wall (of which in fact said element forms a section), and the width thereof is usually determined by the rules of the road transport (in Italy 2.50 m), if a special and/or exceptional transport (more expensive) shall be avoided. It is however possible to obtain larger or.smaller ele- ments by modifying, by means of appropriate distancing elements of known kind, the trim of the production moulds. It is also possible to modify, in a known way, the- incli¬ nation of the heads (16) so as to obtain, with more com¬ ponents of the same kind, tanks having a poligonal plant, as well as components having an outwardly open channel (15), as shown in figure 6. Figures 1, 2 and 3 respectively show a front view, a ver¬ tical section and a transversal section of element A. Figures 4 and 5 respectively show a detail of two connect¬ ed elements (in plant) and, in an axonometric view, two elements ready for the interface connection thereof. The element A, as shown in the figures,shows in its struc¬ ture a thin wall 1 devellopping in the central part the¬ reof and downwardly separating into two walls 2 having the shape of an "Y" truned upside down so as to internally 5. form a hollow aread 6 provided with openings 7 and out¬ wardly two inclined or "chamfered" planes 2. Said thin wall 1-2 is laterally limited by ribs 3, has a central rib 4 and upwardly a horizontal rib 5. 0 The vertical ribs 3 and 4 may have a variable thickness, i.e. tapered from the bottom to the height according to the hydrostatic push; the horizontal rib 5 is dimensioned so as to support loads acting on the same and to trans¬ mit them,.- by means of a rigid connection, to said vertical 5 ribs rigidly connected to the basing by means of the pro¬ jecting reinforcement irons 14 and 13. For the statical purposes each element is provided as a shelf and therefore may discharge to the basing the ho- 0 rizontal as well as the vertical loads acting on the surfaces thereof, and therefore each element is indepen¬ dent from the others forming the " tank. The rigid foot connection, i.e. between the base of the 5 element and the bed P, is further guaranteed by the fill¬ ing with concrete of the hollow area 6 through openings 7; at the same time, the concrete casting also provides a better base hydraulic sealing. The inclined planes formed by thin walls 2 have the func¬ tional purposes to avoid the forming of dead angles; in fact, they form two chamferings between the outside of the thin wall 1 and the outer line (base) of ribs 3 and 4, hav- ing the purpose of avoiding the setting of sedimentable substances. For what concerns the ribs, they are shown and described only for exemplifying purposes as, according to the di- mensional features of the prefabricate, they could be increased or reduced in their number and consequently also differently shaped. The element is provided at the base thereof with external vertical ribs 3, with two metal bracket feet 13 -which may be included in the pro- duction phase of the prefabricate and may, or not, com¬ plete the reinforcing iron; the same, they may be ap¬ plied in a following phase by means of welding and/or other fixing system, or they may also assume a not r ne- cessarily bracket shape. The function of the resting feet or means 13 is the one of allowing, in the installation phase, the automatic centring-alignment-levelling onto the apposite metal device that will be described in detail hereinbelow, « and by which said feet or means 13 will be supported and temporarily hooked to. The vertical connection (union) between one element and the other is obtained by male-female joints 8-9, obtain¬ ed in the production phase by an appropriate shaping of the lateral ends of each element in correspondence with the sides of the ribs 3. More precisely, each component has a male-shaped side 8 and a female-shaped side 9. At the sides of the respective joints 8 and 9, and along the whole height of the element, apposite grooves 10 are provided for the placing of the double elastic gasket 11. In the installation phase, the female-shaped side 9 of the element to be mounted is placed ahead of the male- shaped side 8 of the previously installed element al¬ ready provided with gaskets 11; a plurality of bolts passing through holes 12 provided on ribs 3 cause, by means of the screwing of the nuts, the fe al side to perform the due mechanical compression onto gaskets 11. The reason for the male-female joint is not so much the one of making the components liable from a statical point of view, because - at it has already been mentioned - for this purpose each component is independent from the others; but rather the one to guide the elements in the coupling phase and to maintain the elastic gaskets in the wanted alignment, as well as the one (function of the male) of protecting said gaskets from casual actions that might be caused by the training of the component to mounted; therefore, the joint shall not necessarily be male-female. The second prefabricated element B of reinforced concre- te, interdependent with element A, assumes, in its struc¬ ture, the shape of an internally empy pillar having a square section base (with a side equal to the side of element A) and the opposite end having an octogonal shape. Figures 7 and 8 respectively show a vertical section and the plant thereof; in this last view it can be seen how the element is characterized in four sides, of which two are provided for a male 8 and two for a female 9 joint, all perfectly ' compatible because they are equal to those of prefabricate A to which element B shall be interfaced on two, three or on all four sides, respectively forming unions at a 90° angle R, "T"-shaped for the connection with an internal wall, cross-shaped CR when a wall is interfaced in the same point by an other one. Figure 9 shows from the outside a perspective detail of an angle gasket CR; figure 10 shows a connection CR; fi¬ gure 11 shows a possible planimetrical scheme that may be obtained with the combination of elements A and B; the dotted lines show the possible applications of fur- ther additions. Element B has in inner cavity 16 with an octogonal sec¬ tion tapered from the top to the bottom for providing the prefabricate with the minimum weight, and the peri¬ metral structure a differential thickness, i.e. propor¬ tional to the hydraulic push decreasing from the bottom to the top. A further function of said inner cavity is the one of assuring a connection to the foot (component base-bed CA) of the maximum reliance for the statical purposes as well as for the hydraulic sealing purposes, by a concrete casting through the upper part. The element B is pro ided with metal resting means for the already mentioned purposes and is connected, dur¬ ing the installation, with an identical double elastic gasket system, as for element A; the mechanical locking action is performed in this case with bolts 22, passing through holes 12 of the ribs 3 of element A and acting on apposite bushings P (already known) drowned in the production- phase in said element B. The third reinforced concrete prefabricate consists of element C whose aim it is to realize perimetral as well as internal walls for tanks having also a wide planime- trical development, like those of the water depuration plants, of the beds for the drying process of mud, or of sand or similar filters, all having an average height of 1 meter. In consideration of low hydraulic push in said cases said element shall not be structurally provided with tapered walls nor with internal hollow areas, nor with particular devices for the connection of the basis the¬ reof to the bed, except for the drowning, in said bed, of the apposite reinforcing irons 14 projecting, for this purpose, from the lower side thereof. For what concerns the dimensions, in consideration of what already men¬ tioned and for economical reasons (production and instal¬ lation times) the component has substantially the shape of a slab having a height, according to the requests, of about one meter and the length about the one of the ground of a tractor (about six meters); greater or smal¬ ler length may be obtained according to the featural dimentions of the tanks to be realized and also according to the modulus given by the distance between the centres of the vertical ribs of the prefabricate. Figure 12 shows a perspective view of the element C; fi¬ gures 13, 14 and 15 show three sections, and respective¬ ly: vertical in correspondence With the thin wall 17; vertical in correspondence with the ribs 18, and trans- versale in the central part. All vertical ribs of one face are provided like a male 8 like a smaller side; all ribs on the other face are pro- vided like a f°male 9 like the other smaller side. This constructive peculiarity allows to connect more components of the same kind on the same axis as well as at a 90° an- gle R, and in "T"-shape, in cross-shape; but it allows also the intersection of two walls in the same point. Figure 16 shows a plant view of a detail of the cross joint CR obtained with four equal components; figure 17 shows an example of planimetrical scheme of a series of adjacent tanks, some of which provided with an internal partition wall realized with element C; the internal dotted lines show the position which the walls might have assumed according to the predetermined modulus, and the external dotted lines show the possible further ad¬ ditions. Said element C has in common with above described pre- febricate elements A and B: - metal resting means; - the installation process on a metal device D; ' - the connection.system between one component and the o- ther and the hydraulic sealing being assured by a doub¬ le elastic gasket to be placed in grooves 10; - perfectly finished surfaces due to t h e known vertical casting production system; - a particularly reduced weight realizing the prefabrica- te like a thin wall 17 defined by vertical ribs 18 and by horizontal ribs 19; - the pecularity of being applicable like perimetral as well as like internal walls; - the mechanical locking system by means of bolts passing through holes 12 operated by known tie-rods. The fourth component of the improving consists of a me- tal device D having the function, in the installation pha¬ se of the prefabricate elements A, B and C, of providing for their automatic centring, alignment and levelling, for thei support and te porari hooking. Said device may be realized according to various structures having similar functions, but in a possible constructive variant, exempli¬ fied in figure 18, 19 and 20 it consists of a plurality of metal profiles welded one to the other and to be drown¬ ed in the concrete of the foundation CS. Figure 18 shows an exploded axo ometric view of device D and of a resting means 13 of a prefabricate in the instal¬ lation phase; the dotted lines show the final placing of the resting means 13 on the two support planes 20 provid¬ ed on the axis and on the ideal plane. The four sections 21 and the section 22 are out of one piece with the sec¬ tions (planes) 20, whereby said section 22 forms, together with the lower end of sections 21, the resting base of device D, and said base will be drowned, together with i- ron pieces 23 provided within section 22 and having the function of tie-rods, in a mortar bed placed on ground P1, being a land ground. The exact placing of the device D is performed: - planimetrically, on the ideal axis of the wall to be realized, in distance between the centres equal to the width/length of the prefabricates; - altrimetrically, according to the exact rate predeter- mined for the resting of the feet of the prefabricates and corresponding, in the device, to the planes of sections 20; each device thus placed will support the resting means of two prefabricates, as shown in figure 20. In drawing V, the figures 21, 22 adn 23 show respective¬ ly: the ground P1 prepared for the placing of the mortar, the mortar placed with the drowned component D and the pieces of the hooking irons 23; the same device, in a - front view, after the performed concrete caasting CS. A- fter the hardening of the concrete CS, the installation of the prefabricates may start. Figures 24 and 25 show the effected installation of the same respectively in a front and in a lateral view. In figures 26 and 27 the .performed placing of the reinforcing irons 24 in the bed CA is shown, said irons being ocnnected to the irons 14 projecting from the prefabricates. • While the prefabricates are installed and connected by a mechanical action performed onto bolts 22 passing through holes 12, the same are hooked to the sections 21 of the device D in correspondence with the resting means with a known system. Said hooking has the purpose of preventing, in the installation phase, the falling down of the prefa¬ bricates due to accidental causes. Once said wall is mounted so as to form one single piece due to the action of bolts 22, the base hooking system is removed for beinα used in a further similar application. After having provided the reinforcing irons 24 of the bed CA, as shown in figures 26 and 27, the concrete casting of the same will be performed, as shown in figures 28 and 29, as well as of the hollow areas 6 of element A and 16 of element B; once the reinforced concrete of the bed CA has hardened, also bolts 22 are removed for the use in a fol¬ lowing installation. The tanks realized in this way are ready for the use ac¬ cording to the provided purposes. The improved installation process according to the present invention proves to be particularly quick, exact, easy and reliable and shows an absolutely new technique, with respect to the one of the "brick on brick" used until now: for the manual assistance to the installation no worker of the building field is needed,.but of the mechanical field, in similarity to what happens when mechanical ele¬ ments are mounted onto metal structures, e.g. on the faces skyscrapers, etc. This has been made possible, and this is the main princi¬ ple of the improving according to the present invention, for having provided the prefabricate elements with appro¬ priate metal resting means which, furthermore, provide said components with extremely exact dimentional features able to be interfaced with the metal support device: the¬ refore metal on metal and no longer concrete on concrete or metal on concrete or vice versa.

Claims: CLAIMS 1. An improvement in the realization processes with prefa¬ bricate reinforced concrete elements, of perimetral and partition walls having a perfect hydraulic sealing for tanks of any kind, characterized in that it consists of: only three prefabricate reinforced concrete elements (A, B and C), two of which (A and B) being interdependent,and the third one (C) of universal use; of a metal device (D) having the purpose, in the installation phase of the pre¬ fabricates (A, B and C), all of them being provided with metal resting means, of allowing the automatic centring- alignment-levelling thereof, the support and the tempora¬ ry hooking thereof; of a non rigid connection system bet- ween one prefabricate and the other, and of a hydraulic sealing system, consisting in turn of an elastic neoprene or similar gasket to be pre-placed in appropriate guides provided in the male-femal Ω joint interfacing points of all prefabricates (A, B and C), provided with apposite holes for the passing of bolts which will be actioned for • the mechanical compression of said elastic gaskets. 2. An improvement according to claim 1 characterized in that the first prefabricate element kind (A) consists in a thin wall (1) devellopping in the central part thereof and downwardly parting into two walls (2) having the shape oι an upside-down turned "Y", so as to create in the in- ternal part thereof a hollow space (6) that will assure a rigid base connection by means of the filling up of the same, during the installation, with concrete through the apposite openings (7). 3. An improvement according to claims 1 and 2, characterized in that the two parting inclined walls (2) prevent, for the functional purposes, the forming of dead angles and areas of setting of sedi entable settings in the area from the base of the vertical ribs ( ' 3 and 4). 4. An improvement according to the precedent claims, charac- terzied in that said first kind element (A) may be used for inner or outer walls, being provided with faces hav- ing identical structural and functional features and with the same finishing degree. 5. An improvement according to claim.1, characterized in that - the prefabricate ele ent of the second kind (B), substan- tially having the shape of an inwardly empty pillar (16) being square at the base and octogonal at the top, has • four perfect^ compatible sides being therefore perfectly suited for interfacing, two by two, with the sides of the first kind element (A), and therefore it will be possible to realize, together with said element (A) ; right angle walls (R), "T"-shaped walls and cross-walls (CR). 6. An improvement according to claim 1, characterized in that the third kind component (C), mainly consisting of a thin wall slab (17) provided with horizontal (19) and vertical (18) ribs, said vertical ribs being male-shaped (8) on one side and female-shaped on the other side (9), as . well as the sides, allows in combination with other ele¬ ments of the same kind, the realization of external as well as internal walls of any length and being connecta- ble one to the other at a right angle (R), in "T"-s " hape or at cross (CR) ccording to the predetermined module. 7. An improvement according to claims 5 and 6, characterized in that the prefabricate components of the second and third kind (B and C) allow eventual amplifications of those works in which they are used as they may be connect¬ ed, in any moment, to components of the first kind (A) and to further components of the kind (C), so as to al¬ low the full use of the already existing walls without the need of demolition or take-up works. 8. An improvement according to claim 1, characterized in that all prefabricate elements (A,B and C) are provided with metal resting means which give them the wanted di¬ mensional precision, being a pecularity of the mechanical components, and allows the installation thereof in a quick and precise way on an apposite ietal . device (D). 3. An improvement according to claim 1, characterized in that one component (D), consisting of an appropriate me- tale device is placed by means of drowning on the axis and on the ideal plane of the wall to be realized, with 5 a distance between the centres corresponding to the length of the prefabricates to be installed, so as to allow the centring-alignment-levelling, the support and the temporary hooking of said prefabricates. 1010. An improvement according to claims 1, 8 and 9, characte¬ rized in that the prefabricates (A, B and C) installa¬ tion process, wherein said prefabricates are provided with metal resting means that will interface with me¬ tal device (D), is mainly based onto the interaction 15 metal on metal which allows extremely exact, quick and safe operative applications. 11. An improvement according to claim 1, characterized in the hydraulic sealing sistem by means of a double ela- 0 stic gasket or similar, having an appropriate section, placed in apposite vertical seats in the interfacing sides of the prefabricates, said sealing being obtained " by means of a mechanical compression operated on said prefabricated by means of apposite bolts, passing 5 through holes provided in said prefabricated, whereby said double elastic gasket system assures a non rigid connection between one prefabricate and the other so prevents the walls from eventual flaws, even due to acci¬ dental causes. 12. An improvement according to claims 1 and 11, characteriz- ed in the mechanical locking, between one prefabricate . and the other, so as to appropriately compress the ela¬ stic gaskets and temporarily make out of one piece all prefabricate elements forming the whole wall, obtained by means of bolts (22) passing through holes (12) suita- bly provided in the prefabricates.

Inventors: TAGLIAPIETRA DIEGO, TAGLIAPIETRA, DIEGO
Applicants: TAGLIAPIETRA DIEGO, TAGLIAPIETRA, DIEGO
Application year: 1987
Main classification: E04H7
IPC codes: E04H7