A diaphragm wall structure system

Abstract

The application discloses a diaphragm wall structure system, characterized in that comprising: a diaphragm wall, a bottom plate, an existing structure and a filling layer, the diaphragm wall is formed with a diaphragm wall gap, first rotary jet pile structure groups and second rotary jet pile structure groups are arranged on both sides of the diaphragm wall gap along the thickness direction of the diaphragm wall, a rotary jet pile diffusion structure group is formed between the first rotary jet pile structure groups and the second rotary jet pile structure groups in the diaphragm wall gap, the bottom plate is arranged in the diaphragm wall gap and located at the top of the rotary jet pile diffusion structure group, the existing structure penetrates the diaphragm wall gap and is located at the top of the bottom plate and has a gap with the bottom plate, and the filling layer is filled in the diaphragm wall gap, covers the bottom plate and covers the existing structure. The diaphragm wall structure system solves the problems of pipeline relocation process difficulty, great relocation risk and the like, shortens the construction period and saves the cost.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a diaphragm wall structure system. Background Technology

[0002] The retaining structure often employs a continuous wall design with internal bracing. Simply put, after the continuous wall is formed and closed, the foundation pit is excavated in conjunction with dewatering. When existing structures exist within the construction area (such as underground stations), such as power corridors, gas pipelines, water supply pipes, or stormwater culverts, the retaining structure of the foundation pit cannot be closed in a timely manner. The usual practice is to wait until the pipelines are relocated before constructing the remaining retaining structure to achieve closure. Alternatively, temporary sealing walls can be installed within the foundation pit area, dividing it into smaller pits and leaving space for pipelines. Construction can then proceed with the relocation of the pipelines within this space. However, this method involves a long construction period and numerous procedures. When pipeline relocation is not considered, the retaining structure within the pipeline area cannot be constructed normally or the risk of construction by translation is too high (reinforcing steel cages need to be hoisted close to high-voltage power cables). If temporary sealing walls are used to divide the foundation pit into smaller foundation pits, although a partially closed foundation pit can be formed to facilitate foundation pit excavation, the pipeline will always exist, and there will still be problems with the construction of the retaining structure within the pipeline area.

[0003] In view of the above, this utility model is hereby proposed. Utility Model Content

[0004] To solve one of the above-mentioned technical problems, this utility model provides a diaphragm wall structure system.

[0005] This application provides the following technical solution:

[0006] This application provides a diaphragm wall structure system, including:

[0007] A diaphragm wall with a diaphragm wall gap is provided on both sides of the diaphragm wall gap along the thickness direction of the diaphragm wall, and a first jet grouting pile structure group and a second jet grouting pile structure group are provided on both sides of the diaphragm wall gap. A jet grouting pile diffusion structure group is formed in the diaphragm wall gap between the first jet grouting pile structure group and the second jet grouting pile structure group.

[0008] The base plate is set inside the diaphragm wall notch and is located on top of the jet grouting pile diffusion structure assembly;

[0009] An existing structure, which penetrates the gap in the diaphragm wall and is located at the top of the base plate, with a gap between it and the base plate;

[0010] A backfill layer is used to fill the gap in the diaphragm wall, cover the base plate, and encase the existing structure.

[0011] Optionally, along the length of the diaphragm wall, the extension length of the first jet grouting pile structure group is greater than that of the second jet grouting pile structure group;

[0012] The second jet grouting pile structure group is located on one side of the area enclosed by the diaphragm wall.

[0013] Optionally, the extension length of the second jet grouting pile structure group along the length direction of the diaphragm wall is no more than 2.5m.

[0014] Optionally, the ratio of the extension length of the first jet grouting pile structure group to the length of the diaphragm wall gap is (1.3~3):1.

[0015] Optionally, the base plate includes steel reinforcement and concrete;

[0016] The steel reinforcement group includes stirrups and longitudinal bars, and the concrete covers the stirrups and longitudinal bars.

[0017] Optionally, the steel reinforcement group includes connecting steel bars;

[0018] The diaphragm wall has an embedded part on one side of the diaphragm wall gap;

[0019] The connecting steel bar and the embedded part are connected and fixed, and the connecting steel bar is connected to the stirrup and / or longitudinal bar.

[0020] Optionally, the steel reinforcement group includes internal connecting bars;

[0021] The internal connecting bars extend along the thickness direction of the diaphragm wall, and the two ends of the internal connecting bars are respectively connected to the longitudinal bars or stirrups located on opposite sides of the gap in the diaphragm wall.

[0022] Optionally, the thickness of the base plate is 50mm to 230mm.

[0023] Optionally, the thickness of the fill layer is 1m to 2m.

[0024] Optionally, the diaphragm wall notch is provided with shotcrete on one or both sides along the thickness direction of the diaphragm wall.

[0025] By adopting the above technical solution, this application has the following beneficial effects:

[0026] The diaphragm wall structure system proposed in this application effectively solves the problems of difficulties and high risks in pipeline relocation, while also shortening the construction period and saving costs. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0028] Figure 1 This is a top view of the diaphragm wall structure system provided in an embodiment of the present invention;

[0029] Figure 2 This is a side view of the diaphragm wall structure system provided in an embodiment of the present invention.

[0030] In the diagram: 1. Diaphragm wall; 11. Embedded part; 2. Diaphragm wall notch; 3. First jet grouting pile structure group; 4. Second jet grouting pile structure group; 5. Jet grouting pile diffusion structure group; 6. Base plate; 61. Stirrups; 62. Longitudinal reinforcement; 63. Connecting reinforcement; 64. Internal connecting reinforcement; 7. Existing structure; 8. Backfill layer; 9. Shotcrete layer; 10. Ground surface. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "upper", "lower", "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.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] like Figure 1 and Figure 2As shown, this application embodiment provides a diaphragm wall structure system, including: a diaphragm wall 1, a base slab 6, an existing structure 7, and a backfill layer 8. The diaphragm wall 1 is located below ground level 10. The existing structure 7 can be a power corridor, gas pipe, water supply pipe, or rainwater culvert, etc. The diaphragm wall 1 has a diaphragm wall gap 2, which is used to avoid the existing structure 7. On both sides of the diaphragm wall gap 2 along the thickness direction of the diaphragm wall 1, a first jet grouting pile structure group 3 and a second jet grouting pile structure group 4 are provided. The first jet grouting pile structure group 3 and the second jet grouting pile structure group 4 are both multiple rows of jet grouting piles arranged sequentially along the direction perpendicular to the thickness direction of the diaphragm wall 1. A jet grouting pile diffusion structure group 5 is formed within the diaphragm wall gap 2 between the first jet grouting pile structure group 3 and the second jet grouting pile structure group 4. The jet grouting pile diffusion structure group 5 can be a diffusion structure that is naturally formed at the bottom of the diaphragm wall gap 2 during the construction of the first jet grouting pile structure group 3 and the second jet grouting pile structure group 4 due to the diffusion of grout. The first jet grouting pile structure group 3 and the second jet grouting pile structure group 4 are located on both sides of the diaphragm wall gap 2, enhancing foundation stability and acting as a water barrier. The base plate 6 is situated within the diaphragm wall gap 2 and is located on top of the jet grouting pile diffusion structure group 5. The base plate 6 connects the two diaphragm walls 1, enhancing structural strength. The existing structure 7 penetrates the diaphragm wall gap 2 and is located on top of the base plate 6, with a gap between them. The backfill layer 8 fills the diaphragm wall gap 2, covering the base plate 6 and encasing the existing structure 7, thus protecting the existing structure 7.

[0035] The diaphragm wall structure system of this application can form a closed foundation pit, which facilitates the excavation of the foundation pit. The diaphragm wall structure system of this application effectively solves the problems of difficulty and high risk in pipeline relocation, and shortens the construction period and saves costs.

[0036] In some possible implementations, the first jet grouting pile structure group 3 extends longer than the second jet grouting pile structure group 4 along the length of the diaphragm wall 1. The second jet grouting pile structure group 4 is located on one side of the area enclosed by the diaphragm wall 1, i.e., on the side of the foundation pit. The first jet grouting pile structure group 3 is located outside the foundation pit, and its number and scale can be appropriately increased.

[0037] In some possible implementations, the extension length of the second jet grouting pile structure group 4 along the length of the diaphragm wall 1 is no more than 2.5m. The ratio of the extension length of the first jet grouting pile structure group 3 to the length of the diaphragm wall gap 2 is (1.3~3):1. The length of the first jet grouting pile structure group 3 is much greater than that of the second jet grouting pile structure group 4. It has been verified that this size ratio setting results in good structural stability of the diaphragm wall 1.

[0038] In some possible implementations, the base plate 6 includes a steel reinforcement group and concrete, the steel reinforcement group including stirrups 61 and longitudinal bars 62, the concrete covering the stirrups 61 and longitudinal bars 62.

[0039] In this implementation plan, the base plate 6 is a reinforced concrete structure. The reinforced concrete base plate 6 serves as the foundation structure layer, directly bearing the vertical pressure of the backfill and the possible lateral pressure. It transfers the load to the jet grouting pile diffusion structure group 5 at the bottom through its own compressive strength and stiffness.

[0040] The steel reinforcement group includes connecting steel bars 63. An embedded part 11 is provided on one side of the diaphragm wall 1 at the diaphragm wall gap 2. The connecting steel bars 63 and the embedded part 11 are connected and fixed. The connecting steel bars 63 are connected to the stirrups 61 and / or longitudinal bars 62, thereby connecting the steel reinforcement group in the base plate 6 and the embedded part 11 in the diaphragm wall 1 into one, which enhances the connection strength and structural stability of the base plate 6 and the diaphragm wall 1.

[0041] In some possible implementations, the reinforcing bar assembly includes an internal connecting bar 64 extending along the thickness direction of the diaphragm wall 1. The two ends of the internal connecting bar 64 are respectively connected to the longitudinal bars 62 or stirrups 61 located on opposite sides of the diaphragm wall notch 2. The internal connecting bar may have an inclined angle with the diaphragm wall 1, and hooks are provided at both ends for attaching to the longitudinal bars 62 on both sides along the thickness direction of the diaphragm wall 1. The internal connecting bar achieves a tight and effective connection of the reinforcing bar assembly.

[0042] In some possible implementations, the thickness of the base slab 6 is 50mm to 230mm. The thickness of the fill layer 8 is 1m to 2m. The thicknesses of the base slab 6 and the fill layer 8 are designed to meet bearing capacity requirements and ensure structural stability.

[0043] In some possible implementations, a shotcrete layer 9 is provided on one or both sides of the diaphragm wall gap 2 along the thickness direction of the diaphragm wall 1. For example, shotcrete can be sprayed on the side of the diaphragm wall gap 2 away from the foundation pit to form the shotcrete layer 9.

[0044] The shotcrete layer 9 can quickly seal the rock surface. High-pressure spraying rapidly covers the rock surface, isolating it from air and water, preventing weathering and detachment of the surrounding rock, and providing a stable environment for subsequent construction. The shotcrete layer 9 forms initial support, actively restraining rock deformation, improving rock stability, and preventing loosening. Through early high-strength support, it provides timely resistance to the surrounding rock, inhibiting further loosening and ensuring construction safety.

[0045] The following are the construction steps for the diaphragm wall 1 structural system of this application:

[0046] Step S1: Construct multiple layers of jet grouting piles on both sides of the diaphragm wall gap 2 along the thickness direction of the diaphragm wall 1 to strengthen the foundation structure;

[0047] In this step, a first jet grouting pile structure group 3 and a second jet grouting pile structure group 4 are formed on both sides of the diaphragm wall gap 2, and a jet grouting pile diffusion structure group 5 is formed at the bottom of the diaphragm wall gap 2.

[0048] Step S2: Excavate the soil in the area of ​​the diaphragm wall gap 2 and spray concrete on the side to form a sprayed concrete layer 9;

[0049] Step S3: Erect a steel reinforcement group on top of the jet grouting pile diffusion structure group 5 and pour it to form the base plate 6;

[0050] At this step, the steel reinforcement group and the embedded parts 11 on the two side diaphragm walls 1 are connected.

[0051] Step S4: Fill the top of the base plate 6 with soil until it covers the existing structure 7.

[0052] Step S5: Construction complete.

[0053] The preferred embodiments disclosed above are merely illustrative of this application. These preferred embodiments do not exhaustively describe all details, nor do they limit the application to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A diaphragm wall structure system, characterized in that, include: A diaphragm wall with a diaphragm wall gap is provided on both sides of the diaphragm wall gap along the thickness direction of the diaphragm wall, and a first jet grouting pile structure group and a second jet grouting pile structure group are provided on both sides of the diaphragm wall gap. A jet grouting pile diffusion structure group is formed in the diaphragm wall gap between the first jet grouting pile structure group and the second jet grouting pile structure group. The base plate is set inside the diaphragm wall notch and is located on top of the jet grouting pile diffusion structure assembly; An existing structure, which penetrates the gap in the diaphragm wall and is located at the top of the base plate, with a gap between it and the base plate; A backfill layer is used to fill the gap in the diaphragm wall, cover the base plate, and encase the existing structure.

2. The diaphragm wall structure system according to claim 1, characterized in that, Along the length of the diaphragm wall, the extension length of the first jet grouting pile structure group is greater than that of the second jet grouting pile structure group; The second jet grouting pile structure group is located on one side of the area enclosed by the diaphragm wall.

3. The diaphragm wall structure system according to claim 1, characterized in that, Along the length of the diaphragm wall, the extension length of the second jet grouting pile structure group is no more than 2.5m.

4. The diaphragm wall structure system according to claim 1, characterized in that, The ratio of the extension length of the first jet grouting pile structure group to the length of the diaphragm wall gap is (1.3~3):

1.

5. The diaphragm wall structure system according to claim 1, characterized in that, The base plate includes steel reinforcement and concrete; The steel reinforcement group includes stirrups and longitudinal bars, and the concrete covers the stirrups and longitudinal bars.

6. The diaphragm wall structure system according to claim 5, characterized in that, The steel reinforcement group includes connecting steel bars; The diaphragm wall has an embedded part on one side of the diaphragm wall gap; The connecting steel bar and the embedded part are connected and fixed, and the connecting steel bar is connected to the stirrup and / or longitudinal bar.

7. The diaphragm wall structure system according to claim 5, characterized in that, The steel reinforcement group includes internal connecting bars; The internal connecting bars extend along the thickness direction of the diaphragm wall, and the two ends of the internal connecting bars are respectively connected to the longitudinal bars or stirrups located on opposite sides of the gap in the diaphragm wall.

8. The diaphragm wall structure system according to claim 1, characterized in that, The thickness of the base plate is 50mm to 230mm.

9. The diaphragm wall structure system according to claim 1, characterized in that, The thickness of the fill layer is 1m to 2m.

10. The diaphragm wall structure system according to any one of claims 1-9, characterized in that, A sprayed concrete layer is provided on one or both sides of the diaphragm wall gap along the thickness direction of the diaphragm wall.

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