CN219509335U - Large-scale thin wall spent fuel stainless steel pool construction structure - Google Patents

Abstract

The utility model discloses a construction structure of a large thin-wall spent fuel stainless steel pool, which comprises a cladding plate positioning structure and a grouting supporting structure. According to the utility model, the panel layer of the grouting support structure, the keel layer are used for blocking the stainless steel panel layer, and four sides of the full framing support are horizontally propped and supported, so that the structural stability of a support system during back grouting of the operating stainless steel panel can be ensured, the whole construction structure is easy to set up and push, and conditions are created for realizing the large-scale post-pasting construction of the large stainless steel pool. Meanwhile, the construction period risk and construction safety risk brought by construction of the large-scale stainless steel cladding can be effectively reduced, the construction progress of the main body of the nuclear island is ensured, and the construction period of the main cold test critical path of the nuclear power station construction is shortened.

Description

Large-scale thin wall spent fuel stainless steel pool construction structure

Technical Field

The utility model belongs to the field of building construction, and particularly relates to a construction structure of a large thin-wall spent fuel stainless steel pool.

Background

The plane size of the spent fuel stainless steel pool of the nuclear power plant is large, and the spent fuel stainless steel pool can span a plurality of construction horizons during construction, for example, the spent fuel stainless steel pool existing in a nuclear power plant fuel factory building in the elevation range of +4.500m to +17.500m, and the length, width and height of the spent fuel stainless steel pool can reach 11.7m, 10.3m and 13m. The construction method adopted at present for the spent fuel stainless steel pool is generally a traditional post-pasting method, namely plastering and leveling are firstly carried out on a wall body on site, and then welding and assembling of stainless steel cladding are carried out on one by one. The method only needs to set up double rows of operation frames, but a large amount of welding and assembling work needs to be carried out on site, the installation efficiency is low, and the risk of a larger construction period exists for the construction of a new reactor type nuclear power station, especially the construction of a first reactor.

Compared with the traditional post-pasting method, the large plate post-pasting and back grouting construction method can reduce the time consumed by the splicing and welding links of the stainless steel cladding board on the construction site, but is based on the traditional construction technology, such as the support method of an operation frame, and does not have the construction conditions for implementing the large plate post-pasting and back grouting.

Disclosure of Invention

The technical aim of the utility model is to design a large thin-wall spent fuel stainless steel pool construction structure capable of realizing post-pasting and back grouting construction of a large plate aiming at the defects in the prior art, so as to improve the construction efficiency of the stainless steel pool and reduce the risk of construction period.

The technical scheme provided by the utility model is as follows:

the utility model provides a large-scale thin wall spent fuel stainless steel pool construction structure, includes cladding panel location structure and grout supporting construction, its characterized in that:

the cladding board positioning structure comprises a plurality of groups of cushion block connectors which are distributed in a pool grouting layer, wherein the grouting layer is a connecting layer between the side wall of a pool foundation wall surface and a stainless steel cladding board layer which covers the side wall of the pool foundation wall surface, and the cushion block connectors are used for fixedly connecting the side wall of the pool foundation wall surface and the stainless steel cladding board;

the grouting support structure comprises a panel layer, a keel layer, a full framing and a top support, wherein the panel layer is enclosed and blocked on the outer side of the stainless steel cladding panel layer and is attached to the outer surface of the stainless steel cladding panel; the keel layer consists of battens arranged in an array and is arranged on the outer side of the panel layer; the full framing includes horizontal pole and vertical pole, the horizontal pole includes horizontal pole and vertical horizontal pole again, and wherein, the top is all installed at the both ends of arbitrary horizontal pole, and the horizontal pole passes through the top at its both ends and clamps on the batten of the fossil fragments layer of the relative both sides in pond to the panel layer top of relative both sides is tight with the mode of propping up the top support, makes it hug closely stainless steel cladding layer.

In addition to the above, a further improved or preferred embodiment further includes:

further, the top support comprises a support head, a screw rod and a nut sleeve, the support head comprises a top plate perpendicular to the screw rod, and the four corners of the top plate of the support head are provided with stop blocks protruding from the surface of the top plate and used for clamping a main batten;

the nut sleeve is arranged on the screw rod and is connected with the screw rod in a matched manner through a threaded structure;

the horizontal rod is of a tubular structure, the diameter of the screw rod is smaller than the diameter of the pipe orifice at the end part of the horizontal rod, the outer outline size of the nut sleeve is larger than the diameter of the pipe orifice at the end part of the horizontal rod, the screw rod is inserted into the pipe orifice at the end part of the horizontal rod in the state that the top support and the horizontal rod are assembled, the supporting head is positioned outside the pipe orifice at the end part, the nut sleeve is blocked outside the pipe orifice at the end part of the horizontal rod, and the length of the top support positioned outside the pipe orifice at the end part is adjusted by screwing the nut sleeve along the screw rod.

Further, the top support comprises a plurality of stiffening steel plates which are uniformly distributed around the head of the screw rod, the stiffening steel plates are right triangle reinforcing plates, one side right-angle edges of the stiffening steel plates are fixedly connected with the top plate of the support head, and the right-angle edges of the other side are parallel to the axial direction of the screw rod and are fixedly connected with the screw rod.

Further, the keel layer comprises a secondary keel layer and a main keel layer, wherein the secondary keel layer is closely adhered to the panel layer and is formed by arranging a plurality of horizontally arranged battens from top to bottom; the main joist layer is arranged on the outer side of the secondary joist layer and consists of a plurality of wood Fang Pailie which are vertically arranged and are horizontally or longitudinally paved.

Further, the panel constituting the panel layer is plywood.

Further, a vertical scissor support structure and a horizontal scissor support structure are arranged in the full framing.

Further, the cushion block plug connector consists of a clamping groove and a clamping head matched with the clamping groove, wherein the clamping groove is fixed on the side wall of the pool foundation wall surface, and the clamping head is fixed on the back surface of the stainless steel cladding panel.

Further, the clamping groove is provided with a rectangular groove cavity extending vertically, and the top end of the clamping groove and one side close to the stainless steel cladding layer are provided with openings; the clamping head is of a T shape and consists of a base and a top plate with the width larger than that of the base, and the width of the top plate of the clamping head is matched with that of the rectangular groove cavity; the opening arranged on one side of the clamping groove has a width smaller than that of the rectangular groove cavity and that of the top plate of the clamping head, and is larger than that of the base of the clamping head, and the clamping head is inserted from the top end of the rectangular groove cavity and is limited and installed in the rectangular groove cavity.

The beneficial effects of the utility model are as follows:

the construction structure of the large thin-wall spent fuel stainless steel pool disclosed by the utility model can ensure the structural stability of a bracket system during back grouting of the operating stainless steel cladding plate through the surrounding baffle of the panel layer and the keel layer to the stainless steel cladding plate layer and the horizontal opposite supporting of four sides of a full framing, and the whole construction structure is easy to set up and push, thereby creating conditions for realizing the construction of the large stainless steel pool by a large-plate post-pasting method. Meanwhile, the construction period risk and construction safety risk brought by construction of the large-scale stainless steel cladding can be effectively reduced, the construction progress of the main body of the nuclear island is ensured, and the construction period of the main cold test critical path of the nuclear power station construction is shortened.

Drawings

FIG. 1 is a schematic plan view of a construction structure for a stainless steel pool facing;

FIG. 2 is a schematic cross-sectional view taken along the direction A-A in FIG. 1;

FIG. 3 is a front view of the jacking construction;

FIG. 4 is a side view of the jacking construction;

FIG. 5 is a top view of the jacking construction;

FIG. 6 is a semi-sectional structural view of the nut sleeve;

FIG. 7 is a top view of the nut sleeve;

FIG. 8 is an enlarged partial block diagram of FIG. 1;

fig. 9 is a schematic view of a panel positioning structure.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings.

The embodiment is described by taking a rectangular large thin-wall spent fuel stainless steel pool as an example, wherein the rectangular stainless steel pool is provided with two opposite side walls. The construction structure shown in fig. 1 and 2 is a construction structure of the stainless steel pool side wall cladding panel, and specifically comprises a cladding panel positioning structure and a grouting supporting structure.

The cladding board positioning structure consists of a plurality of groups of cushion block connectors distributed in the pool grouting layer 3. The grouting layer 3 is a connecting layer between the side wall of the pool concrete foundation wall and the stainless steel cladding layer 5 covering the side wall, and is formed by injecting concrete between the side wall of the pool concrete foundation wall and the stainless steel cladding layer 5. The cushion block plug connector is used for fixedly connecting the side wall of the pool foundation wall surface and the stainless steel cladding board, and specifically comprises a clamping groove 8-1 and a clamping head 8-2 matched with the clamping groove.

The clamping groove 8-1 is fixed on the side wall of the pool foundation wall and is provided with a rectangular groove cavity extending vertically, as shown in fig. 9, the clamping groove 8-1 comprises two clamping groove units with symmetrical structures, each clamping groove unit consists of a pair of angle steels welded together, the angle steels are respectively a first angle steel and a second angle steel, the first angle steels of the two clamping groove units are used as folded edges, the folded edges are anchored on the pool concrete foundation wall side wall through bolts, the folded angles of the second angle steels of the two clamping groove units are oppositely arranged, a certain distance is kept, and side openings through which the rectangular groove cavity and the chuck base pass are formed.

The clamping head 8-2 is T-shaped and consists of a base and a top plate with the width larger than that of the base. The base is made of channel steel, and the clamping head 8-2 is fixedly connected with the stainless steel cladding panel through the base. The width of the top plate of the clamping head is matched with the width of the rectangular groove cavity, so that the top plate of the clamping head can be inserted into the rectangular groove cavity from the top surface, and the clamping head cannot shake or separate from the side surface opening easily. The width of the side opening is smaller than the width of the rectangular groove cavity and the width of the chuck top plate, and is larger than the width of the chuck base.

The grouting support structure comprises a panel layer 4, a keel layer, a full framing 6 and a top support 7.

The stainless steel cladding layer 5 is formed by splicing a plurality of stainless steel cladding plates. The panel layer 4 is formed by splicing plywood, and is enclosed and blocked on the outer side of the stainless steel cladding panel layer 5 and attached to the outer surface of the stainless steel cladding panel, and the stainless steel pool cladding panel is assisted to bear the horizontal lateral pressure generated by back grouting.

The keel layer comprises a secondary keel layer 1 and a main keel layer 2, wherein the secondary keel layer 1 is closely adhered to the panel layer 4 and is formed by arranging a plurality of horizontally arranged battens from top to bottom; the main joist layer 2 is arranged on the outer side of the secondary joist layer 1 and is formed by arranging a plurality of wood squares which are vertically arranged along the transverse direction or the longitudinal direction, namely, the wood squares of the main joist layer 2 are orthogonal to the wood squares of the secondary joist layer 1. The main keels and the secondary keels directly lean against the surface of the plywood to bear the horizontal load transmitted by the plywood, and transmit the force to the full framing 6 through the top support 7, so that the main keels and the secondary keels together with the plywood can be equivalently a bottom die structure of a cast-in-place concrete floor slab.

The full framing 6 comprises horizontal bars, vertical bars 6-3, vertical scissors supporting structures and horizontal scissors supporting structures (the scissors supporting structures are reinforcing bars crossed on the supporting frames and used for improving stability of the supporting frames), and the horizontal bars comprise transverse horizontal bars 6-1 and longitudinal horizontal bars 6-2. Namely, the full framing 6 forms a "#" shaped support in the horizontal direction, wherein, the two ends of any horizontal rod are provided with the propping 7, the horizontal rod is clamped on the battens of the main joist layers 2 at the opposite sides of the pool through the propping 7 at the two ends of the horizontal rod, and the propping pressure is transmitted to the battens of the secondary joist layers 1 through the battens of the main joist layers 2 in a propping support mode and then transmitted to the panel layers 4 at the opposite sides, so that the panel layers 5 are clung to the stainless steel cladding layers. The horizontal rod 6-1 of the full framing 6 bears the axial force transmitted by the top support 4, and is in an axial compression state during grouting, which is equivalent to a cast-in-place concrete floor full-hall supporting frame structure.

The top support 7 is an adjustable top support and comprises a support head 7-1, a stiffening steel plate 7-2, a screw rod 7-3 and a nut sleeve 7-4, as shown in figures 3-5. The supporting head 7-1 comprises a top plate perpendicular to the screw rod 7-3, and the four corners of the top plate of the supporting head are provided with stop blocks protruding from the surface of the top plate and used for clamping the battens of the main keel layer 2. The nut sleeve 7-4 is arranged on the screw rod 7-3 and is connected with the screw rod 7-3 in a matched manner through a threaded structure. For ease of screwing, the nut case 7-4 is a nut case with a handle, as shown in fig. 7. The stiffening steel plates 7-2 are right triangle reinforcing plates and are uniformly distributed around the head of the screw rod 7-3, one side right-angle side of each stiffening steel plate is fixedly connected with the top plate of the support head, and the other side right-angle side of each stiffening steel plate is parallel to the axial direction of the screw rod 7-3 and is fixedly connected with the screw rod 7-3 so as to improve the structural strength of the top support.

In this embodiment, the horizontal rod and the vertical rod are steel pipes. The diameter of the screw rod 7-3 is smaller than that of the pipe orifice at the end of the horizontal rod, and the outer contour dimension (the distance between the two ends of the handle) of the nut sleeve 7-4 is larger than that of the pipe orifice at the end of the horizontal rod. So when the top support 7 and the horizontal rod are assembled, the screw rod 7-3 can be inserted into the pipe orifice at the end part of the horizontal rod, the support head 7-1 and the nut sleeve 7-4 are positioned outside the pipe orifice at the end part, the nut sleeve 7-4 is blocked at the pipe orifice at the end part of the horizontal rod, the nut sleeve 7-4 is screwed to move along the screw rod 7-3, the distance from the nut sleeve 7-4 to the support head 7-1 can be adjusted, or the length of the top support 7 positioned outside the horizontal rod can be adjusted, so that the top support 7 can tightly prop against the main joist square, and the adjustment of the pressing force of the top support on the horizontal rod is realized.

The construction flow of the construction structure of this embodiment is mainly performed in the following 6 major parts:

1. constructing a pool wall and anchoring parts;

2. setting up a middle full framing;

3. hoisting the stainless steel cladding plate into place;

4. installing a top support, perfecting and reinforcing a grouting support structure;

5. pouring grouting material;

6. and (5) removing the grouting support structure.

The pool has larger plane size, a full framing is erected by leaving a surplus space for the full framing to be erected from the middle to the periphery in the installation process of the surrounding wall construction or anchoring and leakage detection system, a panel supporting and covering hoisting space is reserved within a range of 2m close to the covering pre-installation position, and the full framing is continued to be erected after the covering is hoisted in place. The joint is ensured to be staggered to meet the requirements, and the subsequent end joint treatment is convenient. The method can lead the erection of the full framing and the earlier stage of the cladding hoisting to be synchronously carried out, thereby saving the whole construction period. When the middle part of the full framing is erected, the vertical scissor struts are arranged according to the requirements, the temporary scissor struts are horizontally arranged, and after the complete frame body is formed, the scissor struts are arranged perfectly.

After the stainless steel cladding is hoisted in place, the panel and the keel are paved, and finally an integral supporting system is formed with the middle frame body, and the building sequence from the near to the far is as follows: plywood panel, secondary joist, main joist, top support and full framing.

The full framing can also be synchronously erected along with the construction of the structure, and can be used as an operating platform for wall construction and installation of an anchoring system. Thereby reducing the repeated erection of the scaffold operating platform.

Practice of practical engineering proves that the structure of the embodiment can enable the large thin-wall spent fuel stainless steel pool to be constructed safely and stably by adopting a construction method of large plate post-pasting and back grouting, can obviously improve working efficiency, reduces construction period risks of construction of the large thin-wall spent fuel stainless steel pool, and particularly shortens cold test main critical path time of a nuclear power station, and has obvious economic benefit and social benefit.

The above is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the utility model without departing from the principles thereof are intended to be within the scope of the utility model as set forth in the following claims.

Claims (8)

1. The utility model provides a large-scale thin wall spent fuel stainless steel pool construction structure, includes cladding panel location structure and grout supporting construction, its characterized in that:

the cladding board positioning structure comprises a plurality of groups of cushion block connectors distributed in a pool grouting layer (3), the grouting layer (3) is a connecting layer between the side wall of a pool foundation wall and a stainless steel cladding board layer (5) covering the side wall of the pool foundation wall, and the cushion block connectors are used for fixedly connecting the side wall of the pool foundation wall and the stainless steel cladding board;

the grouting support structure comprises a panel layer (4), a keel layer, a full framing (6) and a top support (7), wherein the panel layer (4) is enclosed and blocked on the outer side of the stainless steel cladding panel layer (5) and is attached to the outer surface of the stainless steel cladding panel; the keel layer consists of battens arranged in an array and is arranged at the outer side of the panel layer (4); the full framing (6) comprises horizontal rods and vertical rods (6-3), each horizontal rod comprises a transverse horizontal rod (6-1) and a longitudinal horizontal rod (6-2), each horizontal rod is provided with a jacking support (7) at two ends, each horizontal rod is clamped on the battens of keel layers at two opposite sides of the pond through the jacking supports (7) at two ends of each horizontal rod, and the panel layers (4) at two opposite sides are tightly jacked in a jacking supporting mode, so that the panel layers are tightly attached to the stainless steel cladding layer (5).

2. The construction structure of the large thin-wall spent fuel stainless steel pool, which is characterized in that:

the top support (7) comprises a support head (7-1), a screw rod (7-3) and a nut sleeve (7-4), the support head (7-1) comprises a top plate perpendicular to the screw rod (7-3), and four corners of the top plate of the support head are provided with stop blocks protruding from the surface of the top plate and used for clamping a wood part;

the nut sleeve (7-4) is arranged on the screw rod (7-3) and is connected with the screw rod (7-3) in a matched manner through a threaded structure;

the horizontal rod is of a tubular structure, the diameter of the screw rod (7-3) is smaller than the diameter of the end opening of the horizontal rod, the outer outline size of the nut sleeve (7-4) is larger than the diameter of the end opening of the horizontal rod, the screw rod (7-3) is inserted into the end opening of the horizontal rod in the assembled state of the top support (7) and the horizontal rod, the support head (7-1) is positioned outside the end opening, the nut sleeve (7-4) is blocked outside the end opening of the horizontal rod, and the length of the top support (7) outside the end opening is adjusted by screwing the nut sleeve (7-4) along the screw rod (7-3).

3. The construction structure of the large thin-wall spent fuel stainless steel pool, which is characterized in that:

the top support (7) comprises a plurality of stiffening steel plates (7-2) which are uniformly distributed around the head of the screw rod, the stiffening steel plates (7-2) are right triangle reinforcing plates, one side right-angle sides of the stiffening steel plates are fixedly connected with the top plate of the support head, and the right-angle sides of the other side are parallel to the axial direction of the screw rod (7-3) and are fixedly connected with the screw rod (7-3).

4. The construction structure of the large thin-wall spent fuel stainless steel pool, which is characterized in that:

the keel layer comprises a secondary keel layer (1) and a main keel layer (2), wherein the secondary keel layer (1) is closely attached to the panel layer (4) and is formed by arranging a plurality of horizontally arranged battens from top to bottom; the main keel layer (2) is arranged on the outer side of the secondary keel layer (1) and is composed of a plurality of vertically arranged wood Fang Pailie which are paved along the transverse direction or the longitudinal direction.

5. The construction structure of the large thin-wall spent fuel stainless steel pool, which is characterized in that:

the panel constituting the panel layer (4) is plywood.

6. The construction structure of the large thin-wall spent fuel stainless steel pool, which is characterized in that:

a vertical scissor support structure and a horizontal scissor support structure are arranged in the full framing (6).

7. The construction structure of the large thin-wall spent fuel stainless steel pool, which is characterized in that:

the cushion block plug connector consists of a clamping groove (8-1) and a clamping head (8-2) matched with the clamping groove, wherein the clamping groove (8-1) is fixed on the side wall of the pool foundation wall, and the clamping head (8-2) is fixed on the back surface of the stainless steel cladding panel.

8. The construction structure of the large thin-wall spent fuel stainless steel pool, which is characterized in that:

the clamping groove (8-1) is provided with a rectangular groove cavity extending vertically, and the top end of the clamping groove and one side close to the stainless steel cladding layer (5) are provided with openings; the clamping head (8-2) is T-shaped and consists of a base and a top plate with the width larger than that of the base, and the width of the top plate of the clamping head is matched with that of the rectangular groove cavity; the opening arranged on one side of the clamping groove (8-1) is smaller than the width of the rectangular groove cavity and the width of the clamping head top plate, and larger than the width of the clamping head base, and the clamping head (8-2) is inserted from the top end of the rectangular groove cavity and is limited and installed in the rectangular groove cavity.