Water collecting well and post-cast strip construction structure and BIM-based construction method thereof

Abstract

The invention discloses a water collecting well and post-cast strip construction structure and a BIM-based construction method thereof. The construction structure comprises a raft plate layer, a post-cast strip is arranged on the raft plate layer, and a water collecting well is arranged in the post-cast strip. The construction method comprises the following steps: carrying out BIM modeling design; preparing for excavation; pouring a cushion layer; performing waterproof construction; binding reinforcing steel bars; mounting a template; pouring a raft plate layer and a water-collecting well: pouring the raft plate layer and the water-collecting well on the cushion layer by adopting concrete, forming the raft plate layer on the upper layer of the cushion layer, forming a post-cast strip on the raft plate layer, and forming the water-collecting well penetrating through the cushion layer to the soil in the post-cast strip; and removing the mold and performing waterproof treatment. The post-cast strip has the beneficial effects that the water collecting well is arranged in the post-cast strip, and the problem that rainwater, maintenance accumulated water and the like of a traditional post-cast strip cannot be effectively drained can be effectively solved; the layout of the water collecting well is optimized, the post-cast strip and the water collecting well are integrally designed, the drainage path is shortened, and blockage caused by the complex drainage path is avoided.

Description

Technical Field

[0001] This application belongs to the technical field of post-cast strip construction for large-diameter raft foundations, and specifically relates to a construction structure for a sump and a post-cast strip, as well as a construction method based on BIM thereof. Background Art

[0002] In traditional post-cast strip construction, there are often problems such as ineffective drainage of rainwater and curing water accumulation. At the same time, it is difficult to clean up the construction waste remaining in the post-cast strip after tying steel bars and setting up water-stop steel plates. A large amount of manpower and material resources need to be invested in drainage and slag cleaning, and structural hidden dangers are easily caused by leakage. Although existing technologies have tried to drain water through embedded pipes or set up temporary drainage facilities, there are still problems such as low drainage efficiency and insufficient structural stability. Summary of the Invention

[0003] The purpose of this application is to provide a construction structure for a sump and a post-cast strip, as well as a construction method based on BIM thereof. A sump is arranged inside the post-cast strip at the bottom of the raft foundation to collect accumulated water, construction waste, etc. that may be generated during the construction process, significantly improving the casting quality of the post-cast strip and enhancing the overall performance of the foundation slab.

[0004] Combined with the actual situation on site, this application arranges the post-cast strip of the raft foundation through BIM technology. By optimizing the layout of the sump, shortening the drainage path, and directly arranging the sump inside the post-cast strip for integrated design, compared with traditional construction methods, it can greatly reduce the labor costs, material costs, and machinery costs for cleaning up construction waste and draining accumulated water in the later stage, shorten the construction period, and effectively reduce the structural hidden dangers caused by leakage, which is beneficial to project cost control, quality management, progress management, and energy conservation and environmental protection work.

[0005] The purpose of this application is achieved through the following technical solutions:

[0006] A construction structure for a sump and a post-cast strip includes a raft slab layer. There is a post-cast strip on the raft slab layer, and a sump is arranged inside the post-cast strip. The bottom surface of the post-cast strip is flush with the wellhead of the sump.

[0007] Furthermore, a cushion layer is arranged below the raft slab layer, and the lower part of the cushion layer is soil. The sump penetrates through the cushion layer to the soil; the cushion layer is made of plain concrete; a waterproof coating layer and a waterproof coiled material layer are arranged between the raft slab layer and the cushion layer; a waterproof coating layer and a waterproof coiled material layer are arranged between the sump and the cushion layer.

[0008] Furthermore, steel bars are arranged inside the raft slab layer and the sump. The raft slab layer and the sump are made of reinforced concrete; a water-stop plate extending into the post-cast strip is arranged inside the raft slab layer; the water-stop plate is made of steel plate; the water-stop plate is a capped eight-shaped structure; a cover plate covering the post-cast strip is arranged on the raft slab layer.

[0009] Furthermore, the water collection well is arranged at least at one of the intersections, corners and dense locations of the post-cast strip.

[0010] A construction method for a water collection well and a post-casting strip construction structure based on BIM comprises the following steps:

[0011] Step S01, BIM modeling and design: BIM is used to model the raft layer, post-casting belt and water collection well, and the post-casting belt and the water collection well are designed in an integrated manner, and the water collection well is built into the post-casting belt;

[0012] Step S02, excavation preparation: for the soil leveling working surface, determine the position, size and elevation of the raft layer, post-casting belt and water collection well according to the BIM design drawings, and reserve the height of the cushion layer;

[0013] Step S03, pouring the cushion layer: using concrete to pour the cushion layer on the soil, and reserving a position for the water collection well to pass through;

[0014] Step S04, waterproof construction: applying waterproof coating on the cushion layer and laying waterproof membrane for the raft layer and the water collection well;

[0015] Step S05, steel bar binding: performing steel bar binding operation according to the position, size and elevation of the raft layer, post-casting strip and water collection well;

[0016] Step S06, template installation: installing the template according to the position, size and elevation of the raft layer, post-casting strip and water collection well;

[0017] Step S07, pouring of raft layer and water collection well: pouring of raft layer and water collection well on cushion layer by using concrete, forming raft layer on cushion layer, forming post-casting strip on raft layer, forming water collection well in post-casting strip which passes through cushion layer to soil;

[0018] Step S08, demoulding and waterproofing.

[0019] Furthermore, in step S01, the layout positions of the post-cast strips and the water collection wells are optimized through the integrated BIM three-dimensional model of the raft layer, the post-cast strips and the water collection wells, and the structural collision is optimized.

[0020] Furthermore, in step S04, a polymer cement waterproof coating is applied on the cushion layer, and at the same time, a pre-laid polymer self-adhesive waterproofing membrane HDPE sheet is laid, and the joints of the membrane are reinforced.

[0021] Furthermore, in step S06, formwork is laid around the water collection well, and the bottom formwork and side formwork are installed and reinforced with wood and steel pipes to ensure that the formwork does not shift or tilt during the pouring process, while ensuring that the formwork joints are tight and the support is firm.

[0022] Further, in step S07, anti-seepage concrete is poured in layers to ensure thorough vibration compaction, and the concrete strength grade is increased by one level compared to the original structure.

[0023] Further, in step S08, when the concrete strength reaches above the design strength and it is ensured that the concrete surface and edges will not be damaged due to form removal, the formwork is removed and covered with geotextile for watering and curing for ≥ 14 days, and then the surface residues are cleaned up.

[0024] Advantages of this application:

[0025] (1) By arranging a sump well inside the post-cast strip in this application, the problems that rainwater, curing water accumulation, etc. cannot be effectively drained after the steel bars and waterstop steel plates are tied in the traditional post-cast strip can be effectively solved. At the same time, it can also be used as a later construction waste removal pool, which is convenient for removing the residues in the post-cast strip later.

[0026] (2) By optimizing the layout of the sump well through BIM technology in this application and integrating the design of the post-cast strip and the sump well, the drainage path is shortened, the blockage caused by the complex drainage path is avoided, the low drainage efficiency is avoided, and the possible structural leakage risk is reduced.

[0027] (3) The construction quality of this application is reliable, which can effectively improve the overall performance and anti-seepage performance of the raft slab, and is also convenient for the subsequent rapid construction. The sump well and the post-cast strip are formed at one time, which is green and environmentally friendly.

[0028] (4) Through the implementation of this application, the construction personnel can directly use a water gun to flush the remaining construction waste and the generated water accumulation into the sump well in the later stage. Compared with the traditional scheme, the construction is more convenient, the operation is simpler, a large amount of manpower and material resources for cleaning are avoided, the construction cost is saved, and the construction efficiency is improved at the same time.

[0029] The main solution of this application and its various further alternative solutions can be freely combined to form multiple solutions, all of which are the solutions that can be adopted and claimed in this application; and in this application, (each non-conflicting option) can be freely combined with each other and with other options. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of this application, all of which are the technical solutions to be protected in this application, and will not be enumerated here. Description of the Drawings

[0030] Figure 1 is the plane layout schematic diagram of this application.

[0031] Figure 2 is the partial structure three-dimensional view of this application.

[0032] Figure 3 is the sectional view of the integrated design structure of the post-cast strip and the sump well of this application.

[0033] Figure 4 This is the three-dimensional view of the integral design structure of the post-cast strip and the sump in the present application.

[0034] In the figure: 1 - soil, 2 - cushion layer, 3 - raft slab layer, 4 - steel bars, 5 - post-cast strip, 6 - water stop plate, 7 - sump, 8 - cover plate. Specific embodiments

[0035] The following non-limiting embodiments are used to illustrate the present application.

[0036] Embodiment 1

[0037] Reference Figures 1 to 4 As shown, a construction structure of a sump and a post-cast strip includes soil 1, cushion layer 2, raft slab layer 3, steel bars 4, post-cast strip 5, water stop plate 6, sump 7 and cover plate 8.

[0038] The raft slab layer 3 is the base layer, which is used to form an integral supporting structure under the building to ensure sufficient bearing capacity for the building or to avoid uneven settlement of the building. A post-cast strip 5 is provided on the raft slab layer 3. The post-cast strip temporarily divides the raft slab layer into several parts. After the internal shrinkage of the raft slab layer, concrete is poured again after a certain period of time to connect the structure into a whole.

[0039] A sump 7 is provided inside the post-cast strip 5, that is, the sump 7 is directly placed inside the post-cast strip 5, not arranged on the side or at a certain interval, but directly placed below the post-cast strip 5 to shorten the drainage path. The bottom surface of the post-cast strip 5 is flush with the wellhead of the sump 7, so that the accumulated water and construction waste in the post-cast strip 5 can directly flow into the sump 7 without worrying about blockage and retention.

[0040] A cushion layer 2 is provided below the raft slab layer 3. The cushion layer 2 is made of 100-mm-thick plain concrete and is used for water isolation, drainage and anti-freezing to improve the working conditions of the raft slab layer and the soil. The soil 1 is below the cushion layer 2. The cushion layer 2 is directly constructed on the soil 1, and the sump 7 penetrates through the cushion layer 2 to the soil 1 to avoid the cushion layer 2 restricting the layout space of the sump 7.

[0041] A waterproof coating layer and a waterproof coiled material layer are provided between the raft slab layer 3 and the cushion layer 2, and a waterproof coating layer and a waterproof coiled material layer are provided between the sump 7 and the cushion layer 2 to ensure the waterproof effect of the valve plate layer 3 and the sump 7 and avoid water leakage.

[0042] Steel bars 4 are provided in the raft slab layer 3 and the sump 7. The raft slab layer 3 and the sump 7 are made of reinforced concrete. The raft slab layer 3 is designed with a laying thickness according to the bearing requirement. The post-cast strip 5 has the same thickness as the raft slab layer 3. The width of the post-cast strip 5 is 800 mm, and the size of the sump is 600*600*300 mm.

[0043] A cover plate 8 covering the post-cast strip 5 is provided on the raft layer 3 to seal the post-cast strip 5, thereby forming a flat working surface with the raft layer 3 to facilitate the movement of personnel and equipment.

[0044] A waterstop plate 6 is provided in the raft layer 3 and extends from both sides to the post-cast strip 5. The waterstop plate 6 is a steel plate and is a capped figure-eight structure. The waterstop plate 6 improves the overall waterproof effect after the concrete is poured in the post-cast strip and blocks the gap between the concrete of the post-cast strip and the concrete of the raft layer.

[0045] The water collection well 7 is arranged at the intersection, corner and dense location of the post-cast strip 5. The intersection and corner are both node locations of the post-cast strip 5, and the dense location is a location where more post-cast strips are arranged within a certain range but there is no node. By optimizing the arrangement position of the water collection well 7, the water collection well 7 is fully utilized to facilitate construction operations.

[0046] Example 2

[0047] A construction method for a water collection well and a post-casting strip construction structure based on BIM comprises the following steps:

[0048] Step S01, BIM modeling design: Combined with the design drawings, BIM's revit is used to model the raft layer 3, the post-casting strip 5 and the water collection well 7 to achieve rapid positioning. The post-casting strip 5 and the water collection well 7 are designed as an integrated whole, and the water collection well 7 is built into the post-casting strip 5.

[0049] In step S01, the layout positions of the post-cast strip 5 and the water collection well 7 are optimized through the integrated BIM three-dimensional model of the raft layer 3, the post-cast strip 5 and the water collection well 7, and the water collection well 7 is arranged at the intersection, corner and dense area of the post-cast strip 5, which can facilitate the rapid treatment of accumulated water and construction waste in the later stage. Optimize structural collision, perform collision detection based on the three-dimensional model, and make structural adjustments in time to eliminate collisions.

[0050] Step S02, excavation preparation: level the working surface of the soil 1, determine the position, size and elevation of the raft layer 3, post-casting strip 5 and water collection well 7 according to the BIM design drawings, and the water collection well inside the post-casting strip needs to level the working surface to below the design elevation to ensure the construction space of the water collection well. And reserve the height of the cushion layer 2 with a thickness of 100m.

[0051] Step S03, cushion layer pouring: C15 concrete is used to pour the cushion layer 2 on the soil 1, and a position for the water collection well 7 to pass through is reserved.

[0052] Step S04, waterproof construction: apply waterproof coating on the cushion layer 2 and lay waterproof membrane for the raft layer 3 and the water collection well 7 to ensure the subsequent waterproof effect of the raft layer 3 and the water collection well 7 relative to the cushion layer 2.

[0053] In step S04, apply 1.5 mm polymer cement waterproof coating (JS-II type) on the cushion layer 2, and at the same time lay a 1.2 mm thick pre-laid high molecular self-adhesive waterproof coiled material HDPE sheet (a 1.5 mm cross-layer film double-sided self-adhesive coiled material is selected for the additional layer), and strengthen the joints of the coiled material.

[0054] Step S05, steel bar binding: Carry out the binding operation of the steel bars 4 according to the positions, dimensions and elevations of the raft slab layer 3, the post-cast strip 5 and the sump 7.

[0055] Step S06, formwork installation: Carry out the installation operation of the formwork according to the positions, dimensions and elevations of the raft slab layer 3, the post-cast strip 5 and the sump 7.

[0056] In step S06, lay the formwork around the sump 7, and install and reinforce the bottom formwork and the side formwork with wooden squares and steel pipes to ensure that the formwork does not shift or tilt during the pouring process, and at the same time ensure that the joints of the formwork are tight and the supports are firm.

[0057] Step S07, pouring of the raft slab layer and the sump: Carry out the pouring operation of the raft slab layer 3 and the sump 7 on the cushion layer 2 with concrete, form the raft slab layer 3 on the upper layer of the cushion layer 2, form the post-cast strip 5 on the raft slab layer 3, the post-cast strip 5 has the same thickness as the raft slab layer 3, the width of the post-cast strip 5 is 800 mm, and form the sump 7 that penetrates through the cushion layer 2 to the soil 1 in the post-cast strip 5, and the size of the sump is 600*600*300 mm.

[0058] In step S07, use anti-seepage concrete (above P6 grade) for layered pouring to ensure dense vibration, and the concrete strength grade is increased by one level compared with the original structure.

[0059] Step S08, remove the formwork and carry out waterproof treatment.

[0060] In step S08, when the concrete strength reaches above the design strength and it is ensured that the surface and edges of the concrete will not be damaged due to formwork removal, remove the formwork and cover it with geotextile and sprinkle water for curing for ≥14 days, and then clean the surface residue.

[0061] The foregoing basic example of the present application and its various further selected examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in the present application. In the solution of the present application, each selected example can be arbitrarily combined with any basic example and selected example.

[0062] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A construction structure for a sump and a post-cast strip, comprising a raft slab layer (3), characterized in that: A post-cast strip (5) is provided on the raft slab layer (3). A sump (7) is provided in the post-cast strip (5), and the bottom surface of the post-cast strip (5) is flush with the wellhead of the sump (7).

2. The construction structure of the sump and post-cast strip according to claim 1, characterized in that: A cushion layer (2) is provided below the raft slab layer (3). The soil (1) is below the cushion layer (2). The sump (7) penetrates through the cushion layer (2) to the soil (1). The cushion layer (2) is made of plain concrete. A waterproof coating layer and a waterproof coiled material layer are provided between the raft slab layer (3) and the cushion layer (2). A waterproof coating layer and a waterproof coiled material layer are provided between the sump (7) and the cushion layer (2).

3. The construction structure of the sump and post-cast strip according to claim 1, wherein: Steel bars (4) are provided in the raft slab layer (3) and the sump (7). The raft slab layer (3) and the sump (7) are made of reinforced concrete. A waterstop plate (6) extending into the post-cast strip (5) is provided in the raft slab layer (3). The waterstop plate (6) is made of steel plate. The waterstop plate (6) is a capped inverted V-shaped structure. A cover plate (8) covering the post-cast strip (5) is provided on the raft slab layer (3).

4. The construction structure of the catch pit and the post-cast strip according to claim 1, 2 or 3, characterized in that: The sump (7) is arranged at least at one of the intersections, corners and dense areas of the post-cast strip (5).

5. A construction method for a sump and post-cast strip construction structure based on BIM, characterized in that, It includes the following steps: Step S01, BIM modeling design: Use BIM to model the raft slab layer (3), the post-cast strip (5) and the sump (7). The post-cast strip (5) and the sump (7) are integrally designed, and the sump (7) is placed inside the post-cast strip (5). Step S02, excavation preparation: Level the working surface for the soil (1). Determine the positions, dimensions and elevations of the raft slab layer (3), the post-cast strip (5) and the sump (7) according to the BIM design drawings, and reserve the height of the cushion layer (2). Step S03, cushion layer pouring: Use concrete to carry out the pouring operation of the cushion layer (2) on the soil (1). And reserve the penetration position of the sump (7). Step S04, waterproof construction: Apply waterproof coating and lay waterproof coiled material on the cushion layer (2) for the raft slab layer (3) and the sump (7). Step S05, steel bar binding: Carry out the binding operation of the steel bars (4) according to the positions, dimensions and elevations of the raft slab layer (3), the post-cast strip (5) and the sump (7). Step S06, formwork installation: Carry out the formwork installation operation according to the positions, dimensions and elevations of the raft slab layer (3), the post-cast strip (5) and the sump (7). Step S07, raft slab layer and sump pouring: Use concrete to carry out the pouring operation of the raft slab layer (3) and the sump (7) on the cushion layer (2). A raft slab layer (3) is formed on the upper layer of the cushion layer (2). A post-cast strip (5) is formed on the raft slab layer (3). A sump (7) penetrating through the cushion layer (2) to the soil (1) is formed in the post-cast strip (5). Step S08, remove the formwork and carry out waterproof treatment.

6. The construction method of the sump and post-pouring belt construction structure based on BIM according to claim 5, characterized in that: In step S01, through the integrated BIM three-dimensional model of the raft slab layer (3), the post-cast strip (5) and the sump (7), optimize the layout positions of the post-cast strip (5) and the sump (7), and optimize the structural collision.

7. The construction method based on BIM for the construction structure of the sump and post-cast strip according to claim 5, characterized in that: In step S04, apply polymer cement waterproof coating on the cushion layer (2), and at the same time lay pre-laid high molecular self-adhesive waterproof coiled material HDPE sheet, and strengthen the treatment of the joints of the coiled material.

8. The construction method based on BIM for the construction structure of the sump and post-cast strip according to claim 5, characterized in that: In step S06, formwork is laid around the sump (7). The bottom formwork and the side formwork are installed and reinforced with wooden squares and steel pipes to ensure that the formwork does not shift or tilt during the pouring process, and at the same time ensure that the formwork joints are tight and the supports are firm.

9. The construction method based on BIM for the construction structure of the sump and post-cast strip according to claim 5, characterized in that: In step S07, anti-seepage concrete is poured in layers to ensure dense vibration, and the concrete strength grade is one level higher than that of the original structure.

10. The construction method of the sump and post-pouring belt construction structure based on BIM according to claim 5, characterized in that: In step S08, when the concrete strength reaches above the design strength and it is ensured that the concrete surface and edges will not be damaged due to formwork removal, the formwork is removed and covered with geotextiles for sprinkler curing for ≥ 14 days, and then the surface residues are cleaned up.

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