Method of installing equipment into a pit container using an anchor member supporting mechanism and an anchor bolt unit

Efficiency of installation work of equipment such as an ECCS pump is enhanced. In an installation method of equipment, a pit can unit in which an upper side frame, a pit can, various reinforcing steels including vertical reinforcing bars reinforcing the above from a periphery, and an anchor plate supporting mechanism are integrated is manufactured in advance, and the pit can unit is placed on an MMR via a lower side frame. Further, an anchor bolt unit is disposed on the anchor plate supporting mechanism after primary concrete is deposited, a relative positional relationship of respective foundation bolts relative to the pit can is corrected by using a template, and secondary concrete is deposited under the state in which the positional relationship is corrected. After that, the ECCS pump is carried into the pit can, and an installation of the ECCS pump is completed by fixing the carried ECCS pump through the respective foundation bolts of which bottom sides are embedded.

TECHNICAL FIELD

The present invention relates to an installation method of equipment such as a vertical pump used at, for example, an atomic power plant, an anchor member supporting mechanism and an anchor bolt unit used when the installation method of equipment is executed.

BACKGROUND ART

Conventionally, a bottomed cylindrical container made of a steel plate called as a pit can is used for a placement of, for example, a large vertical pump in an atomic power plant and so on. The vertical pump and so on is fixed by foundation bolts under a state that a lower side of a pump main body is inserted into the pit can embedded in base concrete.

Besides, an installation method and so on to efficiently install the pit can are proposed. Namely, anchor bolts for equipment installation such as the vertical pump are attached at a periphery of the pit can in advance at a manufacturing factory in this installation method. Further, a coupling member is attached at a bottom portion of the pit can. After that, a pit can module is formed by attaching reinforcing steels for reinforcement at the periphery of the pit can in this installation method. Further, the pit can module is mounted on a member to be coupled placed on a base of an installation field of the vertical pump and so on via the coupling member in this installation method. After that, an installation of the pit can main body is completed by depositing concrete.

PRIOR ART REFERENCES

Patent References

SUMMARY OF THE INVENTION

Problems to Be Solved by the Invention

However, in the above-stated installation method, the anchor bolds for equipment installation are attached at the periphery of the pit can main body when the pit can module is manufactured. After that, the installation method further goes through a working process in which the reinforcing steels for reinforcement are attached at the periphery of the pit can main body. Accordingly, a relatively difficult work to place the reinforcing steels at the periphery of the pit can while avoiding interference with the anchor bolts on component layout is required in this installation method. It is therefore required to improve working efficiency as for the installation work of equipment including the installation of the pit can.

The present invention is made to solve the above-stated problems and an object thereof is to provide an installation method of equipment, an anchor member supporting mechanism, and an anchor bolt unit capable of enhancing installation work efficiency of the equipment.

Means for Solving the Problems

To attain the above-stated object, an installation method of equipment according to an aspect of the present invention includes: disposing a first frame at a position different from an installation location of the equipment; disposing reinforcing steels to reinforce the first frame and a pit container in a bottomed cylindrical state to be placed on the first frame from a periphery thereof; placing the pit container on the first frame positioning inside the reinforcing steels; attaching an anchor member supporting mechanism to the pit container, the anchor member supporting mechanism including a supporting member to support an anchor member in a ring state at an outer peripheral side of the pit container, and a reinforcing member in a ring state having a center hole and in which a part of each reinforcing steel is penetrated from a gap formed between the center hole and an outer peripheral portion of the pit container while reinforcing the supporting member from the outer peripheral side of the pit container; placing a second frame on a base to be the installation location of the equipment; placing a pit container unit on the second frame via the first frame, the pit container unit being formed by integrating the first frame, the reinforcing steels, the pit container and the anchor member supporting mechanism; embedding a portion at a lower side than the anchor member supporting mechanism of the pit container unit, together with the second frame, by primary concrete; disposing an anchor bolt unit in which respective bottom sides of plural foundation bolts for equipment installation are respectively fixed to the anchor member on the anchor member supporting mechanism after the embedding by the primary concrete; correcting a relative positional relationship of the respective foundation bolts relative to the pit container by using a template member having plural positioning holes into which the plural foundation bolts on the anchor bolt unit can be individually inserted from upper end sides thereof; embedding the pit container unit and the anchor bolt unit by secondary concrete except the template member under a state in which the positional relationship is corrected, an opening portion at upward of the pit container, and upper end sides of the plural foundation bolts; and carrying the equipment into the pit container after the template member is removed and fixing the carried equipment through the respective foundation bolts of which bottom sides are embedded.

In this installation method, the pit container unit in which the first frame, the pit container, the reinforcing steels reinforcing the above from a periphery, and the anchor member supporting mechanism are integrated is manufactured in advance, and the pit container unit is placed on a base to be the installation location of the equipment via the first and second frames. Further, in the installation method, the anchor bolt unit is disposed on the anchor member supporting mechanism after the portion at the lower side than the anchor member supporting mechanism of the pit container unit is embedded by primary concrete. Next, in this installation method, the relative positional relationship of the respective foundation bolts on the anchor bolt unit relative to the pit container is corrected by using the template member. Further, in this installation method, secondary concrete is deposited under the state in which the positional relationship of the respective foundation bolts is corrected. After that, in this installation method, the equipment is carried into the pit container, and an installation of the equipment such as a vertical pump is completed by fixing the carried equipment through the respective foundation bolts of which bottom sides are embedded.

Namely, the installation method of equipment according to this aspect is the one in which the reinforcing steels to reinforce the first frame and the pit container from the periphery thereof are disposed before the anchor bolt unit in which the plural foundation bolts are fixed is disposed at the pit container side. Accordingly, it is possible to perform the disposition work of the reinforcing steels around the pit container relatively easily without concerning the interference with the foundation bolts and so on, on the component layout according to the installation method. Besides, according to the installation method, it is possible to dispose the anchor bolt unit on the anchor member supporting mechanism under a state in which a part of each reinforcing steel is penetrated from a gap formed between the center hole of the ring state reinforcing member included by the anchor member supporting mechanism and the outer peripheral portion of the pit container (namely, under a state in which the positions of the reinforcing steels are controlled). According to the installation method, it is possible to improve the workability at the component disposition time.

Besides, the supporting member of the anchor member supporting mechanism may be made up of, for example, plural plate state members respectively protruding in a radial pattern from an outer peripheral portion of the pit container. Besides, the reinforcing member in the ring state may be made up to integrally support the plural plate state members from a bottom side.

Further, the anchor bolt unit is made up by respectively welding the respective bottom sides of the plural foundation bolts at predetermined positions on the anchor member respectively corresponding to positions of plural installation holes bored at a casing of the equipment in advance and positions of the plural positioning holes on the template member and so on. As stated above, it is possible to further improve the workability at the equipment installation time by applying the anchor bolt unit in which the plural foundation bolts and the anchor member are integrated in advance.

Effect of the Invention

According to the present invention, it is possible to provide the installation method of equipment, the anchor member supporting mechanism, and the anchor bolt unit capable of enhancing the efficiency of the installation work of equipment.

EMBODIMENTS FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention are described based on the drawings. Here,FIG. 1is a partial sectional view schematically illustrating a state in which an ECCS (Emergency Core Cooling System) pump71is installed by an installation method of equipment according to an embodiment of the present invention. Note that a peripheral structure at an embedded portion of the ECCS pump71is not illustrated inFIG. 1.

As illustrated inFIG. 1, the ECCS pump71is one of equipments placed in an atomic power plant and so on. The ECCS pump71is a vertical pump to supply cooling water to a reactor core in an emergency. The ECCS pump71includes a base part74and a lower casing75constituting a casing portion (a casing of a pump main body called also as a barrel), a water inlet part72where the water is entered, and a water outlet part73to be a discharge side of water, and so on.

The ECCS pump71is installed under a state in which the lower casing75is accommodated in a later-described pit can20aof a pit can unit20embedded inside secondary concrete (concrete body)61. In detail, plural installation holes74afor equipment installation are bored in advance at the base part74. The ECCS pump71is installed on the secondary concrete61under a state in which respective foundation bolts54of which bottom sides are embedded are inserted into these installation holes74a, and engaged by nuts54a.

Next, the installation method of equipment of the present embodiment is described by using flowcharts illustrated inFIG. 2toFIG. 4, and views mechanically illustrating respective working processes ofFIG. 1andFIG. 5toFIG. 24. Here, the working processes illustrated by dotted lines inFIG. 2toFIG. 4represent construction side works (works relating to construction application), on the other hand, the working processes illustrated by solid lines represent mechanical side works (works relating to attachment of various components) other than the construction side works.

At first, as illustrated inFIG. 2andFIG. 5, a surface plate (ground assembling surface plate)15is placed on a G.L (Ground Line)12by the construction side work at the other location (manufacturing factory and so on) different from a final installation location of the ECCS pump71. Besides, temporary receiving structures14are provided on the surface plate15. Further, a scaffold (ground assembling scaffold)16is provided on the G.L12(S[ step]1).

Next, as illustrated inFIG. 2andFIG. 6, an upper side frame (first frame)17made of, for example, steel to place the pit can20aon the surface plate15via the temporary frame14is mounted and a level adjustment in a height direction is performed (S2).

Further, as illustrated inFIG. 2andFIG. 7, vertical reinforcing bars18to be reinforcing steels to reinforce the upper side frame17and the pit can20afrom a periphery thereof are disposed (inserted and temporary disposed) by the construction side work so that an upper side thereof becomes a posture standing in a vertical direction (S3) before the pit can20ais placed (temporary set) on the upper side frame17.

Next, as illustrated inFIG. 2andFIG. 8, a temporary placing (temporary setting) of the pit can20ato which suspended pieces (suspended clasps)46are attached is performed by suspending on the upper side frame17by an equipment side work (S4). Here, the pit can20ais constituted by a bottomed cylindrical pit container made of, for example, a steel plate having a space capable of accommodating the lower casing75of the ECCS pump71from an upper side as illustrated inFIG. 1andFIG. 8.

Subsequently, as illustrated inFIG. 2andFIG. 9AtoFIG. 9C, an anchor plate supporting mechanism (anchor member supporting mechanism)21including an anchor plate supporting member (called also as an anchor plate receiving beam)22functioning as a supporting member and a ring state dummy anchor plate22afunctioning as a reinforcing member are attached to a pit can20aside (S5). Here, the anchor plate supporting member22is constituted by plural plate state (or block state) members respectively protruding from an outer peripheral portion of the pit can20ain a radial pattern. The anchor plate supporting member22supports a later-described ring state anchor plate58(refer toFIG. 20) at an outer peripheral side of the pit can20a.

Here, the attachment of the anchor plate supporting member22is described in more detail. As illustrated inFIG. 9AandFIG. 9B, marking positions of an angle member23attached to the pit can20aare checked. For example, 12 pieces of anchor plate supporting members22are welded at the marking positions (positions spaced with intervals of, for example, every 30 degrees in a circumferential direction of the angle member23) of the angle member23. At this time, it should be noted not to directly weld the anchor plate supporting member22and the pit can20a. Besides, suspended pieces (suspended clasps)24are attached to the upper side frame17as illustrated inFIG. 9B.

As illustrated inFIG. 9AtoFIG. 9C, the ring state dummy anchor plate22ahas a center hole22bformed with, for example, an inside diameter of P1. The dummy anchor plate22areinforces the anchor plate supporting member22from an outer peripheral side of the pit can20a. In the dummy anchor plate22a, a part (a tip portion) of each vertical reinforcing bar18is penetrated from a gap formed between the center hole22band the outer peripheral portion of the pit can20aas illustrated inFIG. 9A.

Next, as illustrated inFIG. 2,FIG. 10AandFIG. 10B, a ground assembling of reinforcing steels for reinforcement around the pit can20ais performed. Namely, circumferential reinforcing bars26, hairpin reinforcements27, and setup reinforcements25are placed (S6). The circumferential reinforcing bar26is a reinforcing steel to reinforce an outer peripheral side of the vertical reinforcing bar18. The hairpin reinforcement27is a reinforcing steel to reinforce between an inner side of the vertical reinforcing bar18and the lower side of the pit can20a. The setup reinforcement25is a reinforcing steel to reinforce between the inner side of the vertical reinforcing bar18and the anchor plate supporting member22, and between the inner side of the vertical reinforcing bar18and the hairpin reinforcement27.

When the reinforcing steels for reinforcement as stated above are placed, the ground assembling of the reinforcing bars around the pit can20ais performed so that a separation distance P2falls within a tolerance range in consideration of the inside diameter P1of the dummy anchor plate22aas illustrated inFIG. 10AandFIG. 10B, and thereby, the vertical reinforcing bars18are permanently placed. The separation distance P2is a distance between the outer peripheral portion of the pit can20aand the inner side portion of the vertical reinforcing bar18. The pit can unit (pit container unit)20in which the upper side frame17, the pit can20a, the anchor plate supporting mechanism21, and the reinforcing steels (the vertical reinforcing bars18, the circumferential reinforcing bars26, the hairpin reinforcements27, and the setup reinforcements25) around the pit can20aincluding the vertical reinforcing bars18are unitized (prefabricated), is thereby constituted. Here, in the installation method of equipment of the present embodiment, the reinforcing steels (the vertical reinforcing bars18, the circumferential reinforcing bar26, and so on) around the pit can20aare constructed as illustrated inFIG. 10AandFIG. 10Bbefore a later-described anchor bolt unit57to which the foundation bolts54are fixed is disposed at the pit can20aside. According to the installation method of equipment of the present embodiment, it is possible to easily perform a disposing work of the reinforcing steels around the pit can20awithout concerning interference with the foundation bolts54on a component layout.

On the other hand, the ground is dug down until a base rock exposes at the installation location of the ECCS pump71, and an inspection of the exposed base rock is performed as illustrated inFIG. 3(S11). Next, concrete is deposited on the base rock after the inspection is completed while curing is performed (S12), and an MMR (MerMaid Rock)11being so-called an artificial base rock is formed as illustrated inFIG. 11A.

Subsequently, as illustrated inFIG. 11AandFIG. 11B, a post cast plate32is placed on the MMR11via a metal anchor and so on after a marking of a placement position of a lower side frame (second frame)30constituted by steel and so on for placing the pit can unit20is performed on the MMR11.

Further, the lower side frame30which is already prefabricated (which is already component processed and temporary assembled) is carried in by using a crane and so on. After a positioning and a level adjustment (height adjustment) of the carried lower side frame30are performed, respective leg parts of the lower side frame30are fixed on the post cast plate32by welding. Besides, span seals31as a sealing material are attached to the respective leg parts of the lower side frame30as illustrated inFIG. 3andFIG. 12. Further, lower step reinforcing members33are stretched across at the lower side of adjacent leg parts of the lower side frame30with each other to reinforce the lower side frame30(S13).

After the lower side frame30is placed, bottom reinforcements (reinforcing steels for reinforcement of bottom end portion)34are disposed in a matrix state as illustrated inFIG. 3,FIG. 13A, andFIG. 13B. Next, units of the bottom reinforcements34are disposed in the matrix state are overlaid for three steps, upper step reinforcing members35are stretched across at upper sides of the adjacent leg parts of the lower side frame30with each other, to further reinforce the lower side frame30(S14). Next, as illustrated inFIG. 14, bottom reinforcements (reinforcing steels)36are disposed in a matrix state at a further upper part of the upper step reinforcing members35. Subsequently, a work reinforcement frame37is placed in a vicinity of the lower side frame30on the bottom reinforcements36.

Next, as illustrated inFIG. 15, a work scaffold40is placed by using the reinforcement frame37. After that, wires41,43and a suspended balance42are attached to the pit can unit20carried from a temporary assembling location. In this state, the pit can unit20is suspended in (carried in) to an upper surface of the lower side frame30, and the pit can unit20is placed on the lower side frame30via the upper side frame17(S21) as illustrated inFIG. 4andFIG. 15. In detail, the upper side frame17is welded along with marking lines and so on marked on the lower side frames30in advance, and the pit can unit20is installed.

Further, as illustrated inFIG. 15andFIG. 16, wires (stay materials)45to prevent the pit can20afrom floating and falling in liquid state cement and mortar are each coupled between the suspended piece46at the pit can20aside and the suspended piece24of the upper side frame17. Here, it is checked if a placement position in a plane direction, a level in a height direction, and a vertical degree (and a circularity) of the pit can20afalls within the tolerance range.

After that, a portion at the lower side of the pit can unit20than the anchor plate supporting mechanism21is embedded by primary concrete51together with the lower side frame30as illustrated inFIG. 4andFIG. 17(the primary concrete51is deposited up to a primary concrete deposit virtual surface51aillustrated inFIG. 17) (S22).

As illustrated inFIG. 4andFIG. 18, after the embedding process by the primary concrete51is completed, the wires45as the stay materials and the suspended pieces46of the pit can20aare removed (S23). Next, as illustrated inFIG. 19AtoFIG. 21B, the anchor bolt unit57to which respective bottom sides of the plural foundation bolts (called also as the anchor bolt)54for equipment installation are respectively fixed to the anchor plate58is disposed on the anchor plate supporting mechanism21of the pit can unit20as illustrated inFIG. 20(S24). Here, in the installation method of equipment of the present embodiment, it is possible to dispose the anchor bolt unit57on the anchor plate supporting mechanism21under the state in which the tip portions of the vertical reinforcing bars18are penetrated from the gap formed between the center hole22bof the ring state dummy anchor plate22aincluded by the anchor plate supporting mechanism21and the outer peripheral portion of the pit can20a(a state in which the positions of the reinforcing steels around the pit can20aare controlled) as illustrated inFIG. 9AandFIG. 9B. Accordingly, the working efficiency at the component disposing time can be improved.

Besides, as illustrated inFIG. 19AandFIG. 19B, in the plural foundation bolts54on the anchor bolt unit57, the respective bottom sides of the foundation bolt main bodies are respectively (engaged by nuts54b,54cand) welded at predetermined positions on the anchor plate58respectively corresponding to the positions of the plural installation holes74abored in advance at the base part74of the ECCS pump71and positions of plural positioning holes53aon a later-described template (template member)53(refer toFIG. 21A). Besides, the respective positioning holes53aon the template53are bored (coaxially processed) at, for example, the same step as a boring process of the installation holes74aon the base part74so as to place the foundation bolts54with high accuracy.

Further, as illustrated inFIG. 21AandFIG. 21B, a relative positional relationship of the respective foundation bolts54relative to the pit can20ais corrected by using the template53made of, for example, a steel plate having the plural positioning holes53ainto which the plural foundation bolts54on the anchor bolt unit57can be individually inserted from upper end sides thereof. In detail, for example, the template53is positioned such that, for example, positions of marks marked on the template53in advance match with positions of marks marked on the pit can20ain advance.

In more detail, a temporary disposition (temporary setting) of the template53is performed firstly as illustrated inFIG. 4,FIG. 21A, andFIG. 21B(S25). Specifically, the template53is fixed via the nuts54aunder the state in which the respective foundation bolts54are inserted into the positioning holes53a. Further, a position (a position in height and plane directions) of the template53is displaced by using, for example, a liner (spacer) and so on, the positional relationship is fallen within the tolerance range, and thereafter, the anchor plate supporting member22on the anchor plate supporting mechanism21and the anchor plate58at a bottom portion of the anchor bolt unit57are spot welded.

After that, the template53is temporary removed (S26), and top reinforcements55being reinforcing steels to reinforce around an upper side of the pit can unit20are disposed for, for example, two steps in a matrix state (S27) as illustrated inFIG. 4andFIG. 22. After that, as illustrated inFIG. 4andFIG. 23, the template53is placed again (permanent disposition) (S28), and the position of the template53is displaced. Accordingly, the relative positional relationship of the respective foundation bolts54relative to the pit can20ais finally corrected (S29).

Next, the pit can unit20and the anchor bolt unit57are embedded by secondary concrete61(deposit the secondary concrete61up to a secondary concrete deposit virtual surface61aillustrated inFIG. 23) as illustrated inFIG. 4andFIG. 24except the template53in the state in which the positional relationship thereof is finally corrected, an opening portion at upside of the pit can20a, and upper end sides of the respective foundation bolts54(S30).

After the secondary concrete61is deposited, various measurements are performed after the template53is removed as illustrated inFIG. 4andFIG. 24(S31). For example, it is checked if concentricity of a center of the template53and a center of the pit can20afalls within the tolerance range. Besides, it is checked if a height level at an upper end of the foundation bolt54falls within the tolerance range, and so on.

Further, as illustrated inFIG. 4andFIG. 24, the ECCS pump71is carried into an accommodating space of the pit can20aafter the template53is removed as illustrated inFIG. 1, and the carried ECCS pump71is fixed via the respective foundation bolts54of which bottom sides are embedded and the nuts54a(S32).

As stated above, in the installation method of equipment according to the present embodiment, the pit can unit20in which the upper side frame17, the pit can20a, various reinforcing steels including the vertical reinforcing bars18reinforcing the above from a periphery thereof, and the anchor plate supporting mechanism21are integrated is manufactured in advance. Further, the manufactured pit can unit20is placed on the MMR11to be the installation location of the equipment via the lower side frame30and the upper side frame17. Further, the anchor bolt unit57is disposed on the anchor plate supporting mechanism21after the portion at the lower side of the pit can unit20than the anchor plate supporting mechanism21is embedded by the primary concrete51. Next, the positional relationship of the respective foundation bolts54on the anchor bolt unit57relative to the pit can20ais corrected by using the template53. Further, the secondary concrete61is deposited under a state in which the positional relationship of the respective foundation bolts54is corrected. After that, the ECCS pump71is carried into the pit can20a, and the installation of the ECCS pump71is completed by fixing the carried ECCS pump71through the respective foundation bolts54of which bottom sides are embedded.

Namely, the installation method of equipment of the present embodiment is the method in which the reinforcing steels around the pit can20asuch as the vertical reinforcing bars18and the circumferential reinforcing bars26are disposed as illustrated inFIG. 10AandFIG. 10Bbefore the anchor bolt unit57to which the plural foundation bolts are fixed is disposed at the pit can20aside. According to the installation method of equipment of the present embodiment, it is possible to easily perform the disposition work of the reinforcing steels around the pit can20awithout concerning the interference with the foundation bolts54on the component layout.

Besides, according to the installation method of equipment of the present embodiment, it is possible to dispose the anchor bolt unit57on the anchor plate supporting mechanism21under the state in which the tip portions of the vertical reinforcing bars18are penetrated from the gap formed between the center hole22bof the ring state dummy anchor plate22aincluded by the anchor plate supporting mechanism21and the outer peripheral portion of the pit can20a(namely, under the state in which the positions of the reinforcing steels around the pit can20aare controlled) as illustrated inFIG. 9AandFIG. 9B. Accordingly, it is possible to improve the assembling workability at the component disposition time according to the installation method of equipment of the present embodiment. In other words, the dummy anchor plate22aenables the function to reinforce the anchor plate supporting member22and the function to control the positions of the reinforcing steels around the pit can20aincluding the vertical reinforcing bars18by a single member.

As stated above, the present invention is concretely described by the embodiments, but the present invention is not limited only to these embodiments, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

INDUSTRIAL APPLICABILITY

The present invention is also useful in a case when an equipment, for example, such as a sump tank is installed in addition to the installation of the vertical pump such as the ECCS pump.

EXPLANATION OF NUMERALS AND SYMBOLS