Pile foundation type diaphragm wall structure with height difference on two sides
By adding a cast-in-place concrete wall to the inside of the diaphragm wall and connecting it to the outer foundation to form an integral structure, the problem of the inability to construct pile foundations on the inside of the diaphragm wall was solved, and the effect of the pile foundation bearing the load of the main building was achieved.
Patent Information
- Application Number
- CN202422755491.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-12
AI Technical Summary
After the inner pile foundation of the diaphragm wall was completed, no additional pile foundation could be added, which meant that the main building design could not meet the construction conditions for adding pile foundations after modification.
By adding a new cast-in-place concrete wall inside the diaphragm wall, and connecting it to the diaphragm wall and the new foundation on the outside, an integral structure is formed to bear part of the load of the main building.
This enabled the pile foundation outside the diaphragm wall to bear the load of the main building, solved the problem of the inability to construct the pile foundation inside the diaphragm wall, and expanded the foundation area.
Smart Images
Figure CN223481821U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building structure technology, specifically to a diaphragm wall structure with pile foundations on both sides having a height difference. Background Technology
[0002] Currently, diaphragm walls are a common enclosure structure system. They offer high rigidity, good integrity, and excellent waterproofing, and can also serve as part of the basement's exterior wall. They are generally used in foundation pit projects with significant depths. The basement of the main building is enclosed within the diaphragm wall, while the outside elevation is the normal outdoor level. Typically, the foundation of the main building is buried quite deep within the diaphragm wall. In some projects, the diaphragm wall may have already been completed, but modifications to the main building within the diaphragm wall construction may have been made afterward. These modifications might require the addition of pile foundations, but the conditions for adding pile foundations within the diaphragm wall are no longer available. Utility Model Content
[0003] The purpose of this utility model is to overcome the defects of the prior art and provide a diaphragm wall structure with a pile foundation on both sides with a height difference, so as to solve the problem that the pile foundation on the inner side of the diaphragm wall can no longer be constructed, but it is still necessary to add pile foundations according to the project situation.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A diaphragm wall structure with a pile foundation on both sides includes a diaphragm wall and a newly added cast-in-place concrete wall located on one side of the diaphragm wall and connected to the diaphragm wall. The newly added cast-in-place concrete wall is fixedly connected to the main building foundation, and the outer side of the diaphragm wall is fixedly connected to the outer newly added foundation.
[0006] In this invention, the diaphragm wall and the newly added cast-in-place concrete wall are connected as a whole, achieving a fixed connection between the main building foundation and the newly added foundation on the outer side of the diaphragm wall at the diaphragm wall. This allows the pile foundation outside the diaphragm wall to also bear part of the main building's load. In other words, by increasing the connection node between the diaphragm wall and the foundation, the purpose of extending the main building's foundation outside the diaphragm wall is achieved.
[0007] Preferably, the sum of the wall thicknesses of the diaphragm wall and the newly added cast-in-place concrete wall is greater than or equal to the thickness of the newly added outer foundation.
[0008] Preferably, the sum of the wall thicknesses of the diaphragm wall and the newly added cast-in-place concrete wall is greater than or equal to the thickness of the main building foundation slab.
[0009] Preferably, the junction between the diaphragm wall and the newly added cast-in-place concrete wall has roughened concrete grooves.
[0010] Preferably, the junction of the diaphragm wall and the newly added cast-in-place concrete wall is connected by several steel rebar anchors.
[0011] Preferably, the rebar is a 10mm rebar, the spacing between adjacent rebars is ≤600mm, and the length of the rebar is ≥200mm.
[0012] In this utility model, the interface between the newly added cast-in-place concrete wall and the existing diaphragm wall must be roughened with concrete chiseling and connected with 10mm steel bars, with a spacing of no more than 600mm and a bar length of no less than 200mm, to ensure that the newly added cast-in-place concrete wall and the existing diaphragm wall form a whole.
[0013] Preferably, the amount of reinforcement on the outer side of the diaphragm wall is greater than or equal to the amount of bottom reinforcement of the main building foundation slab and the amount of bottom reinforcement of the newly added outer foundation slab, and the amount of reinforcement on the inner side of the newly added cast-in-place concrete wall is greater than or equal to the amount of top reinforcement of the main building foundation slab and the amount of top reinforcement of the newly added outer foundation slab. This design achieves a fixed connection between the foundations on both sides at the integral wall structure.
[0014] The advantages of this utility model compared with the prior art are:
[0015] In this invention, the diaphragm wall and the newly added cast-in-place concrete wall are connected as a whole, achieving a fixed connection between the main building foundation and the newly added foundation on the outer side of the diaphragm wall at the diaphragm wall. This allows the pile foundation outside the diaphragm wall to also bear part of the main building's load. In other words, by increasing the connection node between the diaphragm wall and the foundation, the purpose of extending the main building's foundation outside the diaphragm wall is achieved.
[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a plan view of a diaphragm wall structure with a pile foundation on both sides, according to the present invention.
[0019] Figure 2 This is a cross-sectional view of a diaphragm wall structure with a pile foundation on both sides, according to the present invention. Detailed Implementation
[0020] The technical solution of this utility model is further described below with reference to specific embodiments:
[0021] like Figure 1 and Figure 2 As shown, this embodiment is a diaphragm wall structure with a pile foundation on both sides with a height difference. It includes a diaphragm wall 1 and a newly added cast-in-place concrete wall 2 located inside the diaphragm wall 1 and connected to the diaphragm wall. The newly added cast-in-place concrete wall 2 is fixedly connected to the main building foundation 3, and the outer side of the diaphragm wall 1 is fixedly connected to the outer newly added foundation 4.
[0022] In this embodiment, the diaphragm wall and the newly added cast-in-place concrete wall are connected as a whole, achieving a fixed connection between the main building foundation and the newly added foundation outside the diaphragm wall at the diaphragm wall. This allows the pile foundation outside the diaphragm wall to also bear part of the main building's load. In other words, by increasing the connection node between the diaphragm wall and the foundation, the purpose of extending the main building's foundation outside the diaphragm wall is achieved.
[0023] In one embodiment, the sum of the wall thicknesses of the diaphragm wall and the newly added cast-in-place concrete wall is greater than or equal to the thickness of the newly added outer foundation.
[0024] In one embodiment, the sum of the wall thicknesses of the diaphragm wall and the newly added cast-in-place concrete wall is greater than or equal to the thickness of the main building foundation slab.
[0025] This allows the main building's foundation to be rigidly connected to the wall side.
[0026] For details, please refer to Figure 2 In the picture:
[0027] a—Thickness of the newly added cast-in-place concrete wall; b—Thickness of the in-situ diaphragm wall.
[0028] c—Additional foundation thickness on the outer side of the wall; d—Main building foundation slab thickness
[0029] It must satisfy a+b≥c and a+b≥d.
[0030] In one embodiment, the junction between the diaphragm wall and the newly added cast-in-place concrete wall has roughened concrete grooves.
[0031] In one embodiment, the junction of the diaphragm wall and the newly added cast-in-place concrete wall is connected by several steel rebar anchors.
[0032] In one embodiment, the rebar anchor is a 10mm rebar anchor, the spacing between adjacent rebar anchors is ≤600mm (what unit is it), and the length of the rebar anchor is ≥200mm.
[0033] In this embodiment, the interface between the newly added cast-in-place concrete wall and the existing diaphragm wall must be roughened with concrete and connected with 10mm steel bars, with a spacing of no more than 600mm and a bar length of no less than 200mm, to ensure that the newly added cast-in-place concrete wall and the existing diaphragm wall form a whole.
[0034] In one embodiment, the amount of reinforcement on the outer side of the diaphragm wall is greater than or equal to the amount of bottom reinforcement of the main building foundation slab and the amount of bottom reinforcement of the newly added outer foundation slab. Similarly, the amount of reinforcement on the inner side of the newly added cast-in-place concrete wall is greater than or equal to the amount of top reinforcement of the main building foundation slab and the amount of top reinforcement of the newly added outer foundation slab. This configuration in this embodiment achieves a fixed connection between the foundations on both sides at the integral wall structure.
[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A diaphragm wall structure with pile foundations on both sides having a height difference, characterized in that, It includes a diaphragm wall and a newly added cast-in-place concrete wall located on one side of the diaphragm wall and connected to the diaphragm wall. The newly added cast-in-place concrete wall is fixedly connected to the main building foundation, and the outer side of the diaphragm wall is fixedly connected to the outer newly added foundation.
2. The diaphragm wall structure with pile foundations on both sides having a height difference as described in claim 1, characterized in that, The sum of the wall thicknesses of the diaphragm wall and the newly added cast-in-place concrete wall is greater than or equal to the thickness of the newly added outer foundation.
3. The diaphragm wall structure with pile foundations on both sides having a height difference as described in claim 2, characterized in that, The sum of the wall thicknesses of the diaphragm wall and the newly added cast-in-place concrete wall is greater than or equal to the thickness of the main building foundation slab.
4. The diaphragm wall structure with pile foundations on both sides having a height difference as described in any one of claims 1 to 3, characterized in that, The junction between the diaphragm wall and the newly added cast-in-place concrete wall has roughened concrete grooves.
5. The diaphragm wall structure with pile foundations on both sides having a height difference as described in claim 4, characterized in that, The junction between the diaphragm wall and the newly added cast-in-place concrete wall is connected by several steel rebar anchors.
6. The diaphragm wall structure with pile foundations on both sides having a height difference as described in claim 5, characterized in that, The rebar anchoring is 10mm rebar anchoring, the spacing between adjacent rebar anchoring is ≤600mm, and the length of the rebar anchoring is ≥200mm.
7. The diaphragm wall structure with pile foundations on both sides having a height difference as described in claim 1, characterized in that, The amount of reinforcement on the outer side of the diaphragm wall is greater than or equal to the amount of bottom reinforcement of the main building foundation slab and the amount of bottom reinforcement of the newly added outer foundation slab. The amount of reinforcement on the inner side of the newly added cast-in-place concrete wall is greater than or equal to the amount of top reinforcement of the main building foundation slab and the amount of top reinforcement of the newly added outer foundation slab.