Backfilling and anti-leakage structure between basement structure outer wall and underground building outer wall under cantilever floor slab

Abstract

The utility model provides a backfill and anti-leakage structure between a basement structure outer wall under a cantilever floor slab and an underground building outer wall, which solves the backfill problem between the basement structure outer wall under the cantilever floor slab and the underground building outer wall by vertically arranging a grouting hole backfill foamed concrete in the cantilever floor slab. A first waterproof coating layer is brushed on the periphery of a grouting hole, then a first concrete layer is poured in the grouting hole, a second waterproof coating layer continues to be brushed on the grouting hole and the periphery of the grouting hole after solidification maintenance, a second concrete layer continues to be poured in the grouting hole, and a third waterproof coating layer is brushed on the second concrete layer and the peripheral area of the second concrete layer after solidification maintenance. And the leakage problem possibly occurring in the grouting hole is solved. The foamed concrete can be used for replacing backfill soil to solve the problem that backfill of the underground limited space is difficult, and meanwhile the problem of leakage possibly caused by backfill can be solved.

Description

Technical Field

[0001] This utility model relates to the field of building backfilling engineering technology, and particularly to the field of backfilling technology between the exterior wall of the basement structure under the cantilever floor slab and the exterior wall of the building. Specifically, it refers to a backfilling and seepage prevention structure between the exterior wall of the basement structure under the cantilever floor slab and the exterior wall of the underground building. Background Technology

[0002] Backfilling refers to earthwork operations carried out during construction, where excavated soil is refilled into the excavated pit to restore the ground surface or to reinforce the foundation. The main functions of backfilling include: 1) restoring the terrain to its original state; 2) reinforcing the foundation and improving its bearing capacity; and 3) ensuring the stability and safety of the engineering structure.

[0003] With the development of the construction industry and the diversification of architectural designs, the backfilling between the basement structural exterior walls and the underground building exterior walls under cantilevered floor slabs has become a problem. The basement is separated from the outdoor soil by the basement structural exterior walls. The underground building exterior walls are the outlines of the basement extending outwards and corresponding to the above-ground buildings. They are usually constructed of shale bricks. Backfilling is carried out outside the basement structural exterior walls. General backfilling is carried out using backfill soil. After compaction, the underground building exterior walls are built to seal the backfill area under the cantilevered floor slab. General backfilling cannot be carried out to the design height due to the presence of the cantilevered floor slab. There is still a cavity under the cantilevered floor slab, which poses a risk of water retention.

[0004] Therefore, there is a problem of backfilling difficulties in the confined space between the basement structure exterior wall and the underground building exterior wall under the cantilever floor slab. In order to solve the technical problem of backfilling, the inventors opened grouting holes in the cantilever floor slab and poured foamed concrete into the confined space to solve the backfilling difficulty problem. However, the technical solution of opening grouting holes in the cantilever floor slab and pouring foamed concrete still has the problem of sealing the grouting holes.

[0005] Therefore, it is desirable to provide a backfill and seepage prevention structure between the basement structure exterior wall and the underground building exterior wall under the cantilever floor slab, which can use foamed concrete to replace backfill soil to solve the problem of difficult backfilling in underground confined spaces, and at the same time solve the leakage problem that may be caused by backfilling. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, one objective of this utility model is to provide a backfill and seepage prevention structure between the basement structure exterior wall and the underground building exterior wall under the cantilever floor slab. It can use foamed concrete to replace backfill soil to solve the problem of difficult backfilling in underground confined spaces, and at the same time solve the leakage problem that may be caused by backfilling. It is suitable for large-scale promotion and application.

[0007] To achieve the above objectives, this utility model provides a backfilling and seepage prevention structure between the basement structural exterior wall and the underground building exterior wall under a cantilevered floor slab, comprising a cantilevered floor slab, a basement structural exterior wall, an underground building exterior wall, and backfill soil. Both the basement structural exterior wall and the underground building exterior wall are vertically arranged and aligned front-to-back, with left-to-right intervals. The cantilevered floor slab is horizontally arranged on both the basement structural exterior wall and the underground building exterior wall. The backfill soil is located to the right of the basement structural exterior wall and abuts against it. The cantilevered floor slab is located above the backfill soil. The lower part of the underground building exterior wall is inserted into the backfill soil. The characteristic feature is that the backfilling and seepage prevention structure between the basement structural exterior wall and the underground building exterior wall under the cantilevered floor slab further includes foamed concrete, a first waterproof coating layer, a second waterproof coating layer, a third waterproof coating layer, a first concrete layer, and a second concrete layer, wherein:

[0008] The cantilevered floor slab is vertically provided with grouting holes. The first waterproof coating layer includes a first upper horizontal coating, a first vertical annular coating, and a first lower horizontal coating. The first upper horizontal coating, the first vertical annular coating, and the first lower horizontal coating are respectively applied to the area surrounding the grouting holes on the top surface of the cantilevered floor slab, the wall of the grouting holes, and the area surrounding the grouting holes on the bottom surface of the cantilevered floor slab. The upper and lower ends of the first vertical annular coating are respectively connected to the first upper horizontal coating and the first lower horizontal coating. The foamed concrete is filled between the backfill soil, the basement structure exterior wall, the cantilevered floor slab, the first lower horizontal coating, and the underground building exterior wall. The first concrete layer is poured in the first vertical annular coating and on the foamed concrete.

[0009] The second waterproof coating layer includes a second upper horizontal coating, a second vertical annular coating, and a second lower horizontal coating. The second upper horizontal coating, the second vertical annular coating, and the second lower horizontal coating are respectively applied to the first upper horizontal coating, the first vertical annular coating, and the first concrete layer. The upper end and the lower end of the second vertical annular coating are respectively connected to the second upper horizontal coating and the second lower horizontal coating. The second concrete layer is poured in the second vertical annular coating and on the second lower horizontal coating. The third waterproof coating layer is applied to the second upper horizontal coating and the second concrete layer.

[0010] Preferably, the foamed concrete is A05 foamed concrete.

[0011] Preferably, there are multiple grouting openings, which are arranged horizontally at intervals.

[0012] More preferably, there are two grouting openings, which are spaced apart from each other on the left and right.

[0013] Preferably, the cross-section of the grouting opening is rectangular.

[0014] More preferably, the length and width of the cross-section of the grouting opening are both 200mm.

[0015] Preferably, both the first upper horizontal coating and the first lower horizontal coating are rectangular annular waterproof coating layers.

[0016] More preferably, the distance from the inner edge to the outer edge of the rectangular annular waterproof coating layer is 300mm.

[0017] Preferably, the height of the first concrete layer is half the height of the cantilever slab.

[0018] Preferably, the top surface of the second concrete layer is flush with the top surface of the second upper horizontal coating.

[0019] The main beneficial effects of this utility model are as follows:

[0020] In this utility model, the cantilevered floor slab, which serves as the backfill and seepage prevention structure between the basement exterior wall and the underground building exterior wall under the cantilevered floor slab, has vertically grouted openings. The first upper horizontal coating, the first vertical annular coating, and the first lower horizontal coating of the first waterproof coating layer are respectively applied to the area surrounding the grouted openings on the top surface of the cantilevered floor slab, the wall of the grouted openings, and the area surrounding the grouted openings on the bottom surface of the cantilevered floor slab. Foamed concrete is filled between the backfill soil, the basement exterior wall, the cantilevered floor slab, the first lower horizontal coating, and the underground building exterior wall. The first concrete layer is poured onto the first vertical annular coating... The second waterproof coating layer is applied to the first upper horizontal coating, the first vertical annular coating, and the first concrete layer, respectively. The second concrete layer is poured into the second vertical annular coating and on the second lower horizontal coating. The third waterproof coating layer is applied to the second upper horizontal coating and the second concrete layer. Therefore, it can use foamed concrete to replace backfill soil to solve the problem of difficult backfilling in underground confined spaces, and at the same time solve the leakage problem that may be caused by backfilling, making it suitable for large-scale promotion and application.

[0021] These and other objects, features and advantages of this utility model will be fully apparent from the following detailed description and drawings, and can be achieved by the means, devices and combinations thereof specifically pointed out in the description of the utility model. Attached Figure Description

[0022] Figure 1This is a partial front sectional view of a specific embodiment of the backfilling and seepage prevention structure between the exterior wall of the basement structure under the cantilevered floor slab and the exterior wall of the underground building according to this utility model.

[0023] Figure 2 yes Figure 1 A partially enlarged schematic diagram of a specific embodiment is shown.

[0024] (Symbol Explanation)

[0025] 1. Cantilevered floor slab; 2. Basement structural exterior wall; 3. Underground building exterior wall; 4. Backfill soil; 5. Foamed concrete; 6. First waterproof coating layer; 7. Second waterproof coating layer; 8. Third waterproof coating layer; 9. First concrete layer; 10. Second concrete layer; 11. Grouting opening; 12. First upper horizontal coating; 13. First vertical ring coating; 14. First lower horizontal coating; 15. Second upper horizontal coating; 16. Second vertical ring coating; 17. Second lower horizontal coating. Detailed Implementation

[0026] In order to better understand the technical content of this utility model, the following embodiments are provided for detailed description.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Please see Figures 1-2 As shown, in a specific embodiment of this utility model, the backfill and seepage prevention structure between the basement structure exterior wall and the underground building exterior wall under the cantilever floor slab includes a cantilever floor slab 1, a basement structure exterior wall 2, an underground building exterior wall 3, backfill soil 4, foamed concrete 5, a first waterproof coating layer 6, a second waterproof coating layer 7, a third waterproof coating layer 8, a first concrete layer 9, and a second concrete layer 10, wherein:

[0029] The basement structural exterior wall 2 and the underground building exterior wall 3 are both vertically arranged and arranged along the front-to-back direction and spaced apart from each other on the left and right. The cantilever floor slab 1 is horizontally arranged and is respectively arranged on the basement structural exterior wall 2 and the underground building exterior wall 3. The backfill soil 4 is located on the right side of the basement structural exterior wall 2 and abuts against the basement structural exterior wall 2. The cantilever floor slab 1 is located above the backfill soil 4. The lower part of the underground building exterior wall 3 is inserted into the backfill soil 4.

[0030] The cantilever slab 1 is vertically provided with a grouting hole 11. The first waterproof coating layer 6 includes a first upper horizontal coating 12, a first vertical annular coating 13, and a first lower horizontal coating 14. The first upper horizontal coating 12, the first vertical annular coating 13, and the first lower horizontal coating 14 are respectively applied to the area surrounding the grouting hole 11 on the top surface of the cantilever slab 1, the wall of the grouting hole 11, and the area surrounding the grouting hole 11 on the bottom surface of the cantilever slab 1. The upper end and the lower end of the first vertical annular coating 13 are respectively connected to the first upper horizontal coating 12 and the first lower horizontal coating 14. The foamed concrete 5 is filled between the backfill soil 4, the basement structure exterior wall 2, the cantilever slab 1, the first lower horizontal coating 14, and the underground building exterior wall 3. The first concrete layer 9 is poured in the first vertical annular coating 13 and on the foamed concrete 5.

[0031] The second waterproof coating layer 7 includes a second upper horizontal coating 15, a second vertical annular coating 16, and a second lower horizontal coating 17. The second upper horizontal coating 15, the second vertical annular coating 16, and the second lower horizontal coating 17 are respectively applied to the first upper horizontal coating 12, the first vertical annular coating 13, and the first concrete layer 9. The upper end and the lower end of the second vertical annular coating 16 are respectively connected to the second upper horizontal coating 15 and the second lower horizontal coating 17. The second concrete layer 10 is poured in the second vertical annular coating 16 and on the second lower horizontal coating 17. The third waterproof coating layer 8 is applied to the second upper horizontal coating 15 and the second concrete layer 10.

[0032] The foamed concrete 5 can be any suitable type of foamed concrete. In a specific embodiment of this utility model, the foamed concrete 5 is A05 foamed concrete.

[0033] The number of grouting openings 11 can be determined as needed. Preferably, there are multiple grouting openings 11, which are arranged horizontally at intervals. "Multiple" here refers to two or more. Please refer to [link to relevant documentation]. Figure 1 As shown, in a specific embodiment of this utility model, there are two grouting openings 11, which are spaced apart from each other.

[0034] The cross-section of the grouting opening 11 can have any suitable shape. In a specific embodiment of the present invention, the cross-section of the grouting opening 11 is rectangular.

[0035] The length and width of the cross-section of the grouting opening 11 can be determined as needed. In a specific embodiment of this utility model, the length and width of the cross-section of the grouting opening 11 are both 200mm.

[0036] The first upper horizontal coating 12 and the first lower horizontal coating 14 can have any suitable shape. In a specific embodiment of the present invention, the first upper horizontal coating 12 and the first lower horizontal coating 14 are both rectangular annular waterproof coating layers.

[0037] The distance from the inner edge to the outer edge of the rectangular annular waterproof coating layer can be determined as needed. In a specific embodiment of this utility model, the distance from the inner edge to the outer edge of the rectangular annular waterproof coating layer is 300mm. Preferably, the first lower horizontal coating 14 covers the entire bottom surface of the cantilever slab 1, and even the right side of the basement structural exterior wall 2 is coated with waterproof coating.

[0038] The height of the first concrete layer 9 can be determined as needed. In a specific embodiment of this utility model, the height of the first concrete layer 9 is half the height of the cantilever floor slab 1.

[0039] The height of the cantilevered floor slab 1 can be determined as needed. In a specific embodiment of this utility model, the height of the cantilevered floor slab 1 is 180mm.

[0040] The top surface of the second concrete layer 10 may or may not be flush with the top surface of the second upper horizontal coating layer 15. Please refer to [link / reference]. Figure 2 As shown, in a specific embodiment of this utility model, the top surface of the second concrete layer 10 is flush with the top surface of the second upper horizontal coating layer 15.

[0041] The depth to which the lower part of the underground building exterior wall 3 is inserted into the backfill soil 4 can be determined as needed. In a specific embodiment of this utility model, the depth to which the lower part of the underground building exterior wall 3 is inserted into the backfill soil 4 is 300mm.

[0042] During construction, vertical grouting openings 11 are made in the cantilever slab 1. Waterproof coatings are applied to the area surrounding the grouting openings 11 on the top surface of the cantilever slab 1, the walls of the grouting openings 11, and the area surrounding the grouting openings 11 on the bottom surface of the cantilever slab 1, forming a first upper horizontal coating 12, a first vertical annular coating 13, and a first lower horizontal coating 14, which is the first waterproof coating layer 6. Backfilling is carried out on the right side of the basement structural exterior wall 2 using backfill soil 4. After compaction, the underground building exterior wall 3 is constructed to seal the backfill area under the cantilever slab 1. Foamed concrete 5 is poured through the grouting openings 11 to the design elevation, forming the first vertical annular coating layer 6. Concrete is poured into the foamed concrete 5 in the shaped coating 13. After solidification and curing, a first concrete layer 9 is formed, sealing the grouting hole 11. Waterproof coating is applied to the first upper horizontal coating 12, the first vertical annular coating 13, and the first concrete layer 9 to form a second upper horizontal coating 15, a second vertical annular coating 16, and a second lower horizontal coating 17, which is the second waterproof coating layer 7. Concrete is poured into the second vertical annular coating 16 and the second lower horizontal coating 17. After solidification and curing, a second concrete layer 10 is formed. Waterproof coating is applied to the second upper horizontal coating 15 and the second concrete layer 10 to form a third waterproof coating layer 8.

[0043] Therefore, this utility model provides a backfilling and seepage prevention structure for underground confined spaces (areas where backfilling is difficult, such as the area between the exterior walls of a basement structure and the exterior walls of an underground building under a cantilevered floor slab). This solves the technical problem of backfilling underground confined spaces. Since the underground confined space cannot meet the backfilling requirements, grouting holes are opened in the cantilevered floor slab in the backfilling area. Foamed concrete is injected through these holes to achieve the backfilling purpose. In other words, the backfilling problem is solved by backfilling foamed concrete through grouting holes in the cantilevered floor slab. Solving the backfilling problem also requires addressing the sealing of the grouting holes opened in the cantilevered floor slab for pouring foamed concrete. A first waterproof coating layer is applied around the grouting hole, followed by the pouring of a first concrete layer into the grouting hole. After curing, a second waterproof coating layer is applied on top of and around the grouting hole. A second concrete layer is then poured into the grouting hole, and after curing, a third waterproof coating layer is applied to the second concrete layer and its surrounding area.

[0044] This invention solves the backfilling problem between the exterior walls of the basement structure and the exterior walls of the underground building under the cantilever floor slab. By replacing the backfill soil with foamed concrete in areas that are difficult to backfill, the backfilling purpose is achieved, solving the problem of difficult outdoor backfilling due to design variations. At the same time, the grouting holes opened in the cantilever floor slab due to the foamed concrete backfill pose a potential leakage risk. This problem is solved by applying three layers of waterproof coating and pouring two layers of concrete. Thus, the backfilling construction is completed, and the purpose of preventing leakage is achieved, ensuring the construction quality.

[0045] In summary, the backfilling and seepage prevention structure between the basement structure exterior wall and the underground building exterior wall under the cantilever floor slab of this utility model can use foamed concrete to replace backfill soil to solve the problem of difficult backfilling in confined underground spaces, and at the same time solve the leakage problem that may be caused by backfilling, making it suitable for large-scale promotion and application.

[0046] Therefore, it is evident that the objective of this utility model has been fully and effectively achieved. The function and structural principles of this utility model have been demonstrated and explained in the embodiments. Without departing from the stated principles, any modifications can be made to the implementation methods. Therefore, this utility model includes all modified embodiments based on the spirit and scope of the claims.

Claims

1. A backfilling and seepage prevention structure between the exterior wall of a basement structure and the exterior wall of an underground building under a cantilevered floor slab, comprising a cantilevered floor slab, an exterior wall of the basement structure, an exterior wall of the underground building, and backfill soil. The exterior wall of the basement structure and the exterior wall of the underground building are both vertically arranged and along the front-to-back direction, and are spaced apart from each other on the left and right sides. The cantilevered floor slab is horizontally arranged and is respectively installed on the exterior wall of the basement structure and the exterior wall of the underground building. The backfill soil is located on the right side of the exterior wall of the basement structure and abuts against it. The cantilevered floor slab is located above the backfill soil. The lower part of the exterior wall of the underground building is inserted into the backfill soil. The structure is characterized in that... The backfill and seepage prevention structure between the basement exterior wall and the underground building exterior wall under the cantilevered floor slab also includes foamed concrete, a first waterproof coating layer, a second waterproof coating layer, a third waterproof coating layer, a first concrete layer, and a second concrete layer, wherein: The cantilevered floor slab is vertically provided with grouting holes. The first waterproof coating layer includes a first upper horizontal coating, a first vertical annular coating, and a first lower horizontal coating. The first upper horizontal coating, the first vertical annular coating, and the first lower horizontal coating are respectively applied to the area surrounding the grouting holes on the top surface of the cantilevered floor slab, the wall of the grouting holes, and the area surrounding the grouting holes on the bottom surface of the cantilevered floor slab. The upper and lower ends of the first vertical annular coating are respectively connected to the first upper horizontal coating and the first lower horizontal coating. The foamed concrete is filled between the backfill soil, the basement structure exterior wall, the cantilevered floor slab, the first lower horizontal coating, and the underground building exterior wall. The first concrete layer is poured in the first vertical annular coating and on the foamed concrete. The second waterproof coating layer includes a second upper horizontal coating, a second vertical annular coating, and a second lower horizontal coating. The second upper horizontal coating, the second vertical annular coating, and the second lower horizontal coating are respectively applied to the first upper horizontal coating, the first vertical annular coating, and the first concrete layer. The upper end and the lower end of the second vertical annular coating are respectively connected to the second upper horizontal coating and the second lower horizontal coating. The second concrete layer is poured in the second vertical annular coating and on the second lower horizontal coating. The third waterproof coating layer is applied to the second upper horizontal coating and the second concrete layer.

2. The backfilling and seepage prevention structure between the exterior wall of the basement structure under the cantilevered floor slab and the exterior wall of the underground building as described in claim 1, characterized in that, The foamed concrete is A05 foamed concrete.

3. The backfilling and seepage prevention structure between the basement structure exterior wall and the underground building exterior wall under the cantilevered floor slab as described in claim 1, characterized in that, The number of grouting openings is multiple, and the multiple grouting openings are arranged horizontally at intervals.

4. The backfilling and seepage prevention structure between the exterior wall of the basement structure under the cantilevered floor slab and the exterior wall of the underground building as described in claim 3, characterized in that, There are two grouting openings, which are spaced apart from each other on the left and right.

5. The backfilling and seepage prevention structure between the exterior wall of the basement structure under the cantilevered floor slab and the exterior wall of the underground building as described in claim 1, characterized in that, The cross-section of the grouting opening is rectangular.

6. The backfilling and seepage prevention structure between the exterior wall of the basement structure under the cantilevered floor slab and the exterior wall of the underground building as described in claim 5, characterized in that, The length and width of the cross-section of the grouting opening are both 200mm.

7. The backfilling and seepage prevention structure between the exterior wall of the basement structure under the cantilevered floor slab and the exterior wall of the underground building as described in claim 1, characterized in that, Both the first upper horizontal coating and the first lower horizontal coating are rectangular annular waterproof coating layers.

8. The backfilling and seepage prevention structure between the exterior wall of the basement structure under the cantilevered floor slab and the exterior wall of the underground building as described in claim 7, characterized in that, The distance from the inner edge to the outer edge of the rectangular annular waterproof coating layer is 300mm.

9. The backfilling and seepage prevention structure between the exterior wall of the basement structure under the cantilevered floor slab and the exterior wall of the underground building as described in claim 1, characterized in that, The height of the first concrete layer is half the height of the cantilever slab.

10. The backfilling and seepage prevention structure between the exterior wall of the basement structure under the cantilevered floor slab and the exterior wall of the underground building as described in claim 1, characterized in that, The top surface of the second concrete layer is flush with the top surface of the second upper horizontal coating.

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