Reinforcing body combining lattice type ground wall and flexible pile for foundation pit engineering

Abstract

The utility model discloses a lattice type ground wall and flexible pile combined reinforcing body for foundation pit engineering, the reinforcing body comprises a plurality of T-shaped enclosure ground walls, a plurality of T-shaped reinforcing ground walls and a plurality of flexible reinforcing piles, the T-shaped enclosure ground walls are arranged along the outer periphery of a foundation pit, the T-shaped reinforcing ground walls are arranged along the inner periphery of the foundation pit, and the flexible reinforcing piles are arranged on the T-shaped enclosure ground walls and the T-shaped reinforcing ground walls. The T-shaped enclosure ground wall and the T-shaped reinforcing ground wall are connected to form a grid cavity, and the multiple flexible reinforcing piles are arranged in the grid cavity. The lattice type underground diaphragm wall has the advantages that the lattice type underground diaphragm wall part has two functions of foundation pit support and reinforcement of a passive area in a pit, the integrity of reinforcement in the pit is further enhanced, the rigidity and the bearing capacity of the ground wall are further improved, mechanical analysis is more uniform and clear, and the restraining function of the rigid ground wall on a soil body at the bottom of the pit is fully exerted; the grid cavities are filled with the flexible piles for reinforcement, so that the deep pit reinforcement requirement at the welt deep pit in the pit can be met.

Description

Technical Field

[0001] This utility model relates to the technical field of foundation pit support, and in particular to a reinforcement system that combines a grid-shaped ground wall with flexible piles for foundation pit engineering. Background Technology

[0002] In soft soil areas, for deep and large foundation pits using diaphragm walls as retaining structures, pre-reinforcement of the foundation pit soil is often employed to reduce the impact on the surrounding environment. This enhances the compressive strength and lateral resistance of the soil in the passive zone, reducing soil compression and retaining wall displacement. Commonly used reinforcement methods include compaction grouting, jet grouting, and soil mixing pile reinforcement. However, a support system composed of multiple construction techniques can easily lead to problems such as long construction periods, extended curing times, inconsistent pile quality, and high project costs.

[0003] The patent with publication number CN219240560U proposes a combined underground continuous wall for foundation pit protection and internal reinforcement. A T-shaped underground continuous wall is set within a certain depth range inside the foundation pit, which is connected or closely attached to the outer underground continuous wall to form an integral whole. This effectively reduces the compression deformation of the soil inside the pit. This structure can effectively solve the problems of complex processes, long construction period, high project cost and uncontrollable deformation in deep and large foundation pit support systems.

[0004] However, this system still has drawbacks. Because the reinforced walls within the pit are dispersed units, the stiffness they provide is relatively limited, and they cannot fully achieve an equal increase in the lateral stiffness of the retaining wall by the rigid reinforcement, thus resulting in some resource waste. Furthermore, due to its discrete and uniformly distributed characteristics, it is highly effective in passive zone reinforcement applications to overcome spatial effects, but it cannot achieve a deep pit reinforcement envelope in the irregularly and scattered deep pit areas near the edges, thus limiting its application scope. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the existing technology by providing a reinforced structure combining a grid-shaped retaining wall and flexible piles for foundation pit engineering. This reinforced structure consists of a T-shaped retaining wall, a T-shaped reinforcing wall, and flexible reinforcing piles. This reinforced structure improves the arrangement of the reinforcing wall, better utilizes the restraining effect of the inner side of the retaining wall, and significantly increases the lateral resistance of the retaining wall. At the same time, it uses traditional flexible reinforcing piles to fill the grid cavity, utilizing the gravity retaining wall slope protection principle formed by the flexible reinforcing piles to meet the needs of stability reinforcement of the deep pit sidewall. Furthermore, after the soil in the grid cavity is reinforced, it avoids the problem of excavation and transportation difficulties caused by the difficulty of dewatering and drainage due to the closed surrounding area.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A reinforced body combining a grid-shaped ground wall and flexible piles for foundation pit engineering, the reinforced body including a T-shaped retaining ground wall, a T-shaped reinforcing ground wall and flexible reinforcing piles, wherein several T-shaped retaining ground walls are arranged around the outside of the foundation pit, and several T-shaped reinforcing ground walls are arranged around the inside of the foundation pit, the T-shaped retaining ground walls and the T-shaped reinforcing ground walls are connected to form a grid cavity, and several flexible reinforcing piles are arranged in the grid cavity.

[0008] Both the T-shaped retaining wall and the T-shaped reinforced wall include a main section and a connecting section arranged perpendicularly to each other. The main section of the T-shaped retaining wall is located outside the foundation pit, and the connecting section of the T-shaped retaining wall is located inside the foundation pit. Both the main section and the connecting section of the T-shaped reinforced wall are located inside the foundation pit, and the connecting section of the T-shaped retaining wall is connected to the connecting section of the T-shaped reinforced wall.

[0009] The main body and connecting sections of the T-shaped retaining wall and the T-shaped reinforced wall are both vertically arranged. The main body and connecting sections of the T-shaped retaining wall are at the same height, and the main body and connecting sections of the T-shaped reinforced wall are at the same height.

[0010] The main sections of the T-shaped retaining wall, the main sections of the T-shaped reinforced wall, and the connecting sections of the T-shaped retaining wall and the T-shaped reinforced wall are all flexible connections.

[0011] The top of the T-shaped retaining wall is located below the ground and the bottom extends to the bottom of the foundation pit. The top of the T-shaped reinforced wall is located below the bottom of the foundation pit and the bottom extends to the bottom of the foundation pit.

[0012] The bottom of the T-shaped retaining wall is located below the bottom of the T-shaped reinforced wall.

[0013] The flexible reinforcing piles are installed throughout the cavity.

[0014] The advantages of this utility model are: the grid-type underground continuous wall section serves two functions: foundation pit protection and passive zone reinforcement within the pit, further enhancing the overall integrity of the pit reinforcement, improving the rigidity and bearing capacity of the wall, and making the mechanical analysis more uniform and clear, fully leveraging the constraint effect of the rigid wall on the soil at the bottom of the pit; the flexible pile reinforcement filling the grid cavity can meet the deep pit reinforcement needs at the edge of the pit; in foundation pits with extremely stringent environmental protection requirements, the deformation control capability of this reinforcement body is further improved, and it also has the capability for deep pit reinforcement; in terms of economic benefits, it is also more outstanding compared to traditional skirt or full-cavity flexible pile reinforcement methods. Attached Figure Description

[0015] Figure 1 This is a top view of the reinforced structure combining a grid-shaped ground wall and flexible piles used in foundation pit engineering according to this utility model.

[0016] Figure 2 This is a cross-sectional view of the reinforced body of the present invention, which combines a grid-shaped ground wall with flexible piles for use in foundation pit engineering.

[0017] like Figures 1-2 As shown in the figure, the labels represent:

[0018] T-shaped retaining wall 10, main section 101, connecting section 102, T-shaped reinforced wall 20, main section 201, connecting section 202, flexible reinforcing pile 30;

[0019] A outside the foundation pit, B inside the foundation pit. Detailed Implementation

[0020] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0021] Example: Figures 1-2 As shown, this embodiment relates to a reinforced structure combining a lattice-shaped retaining wall and flexible piles for foundation pit engineering. The reinforced structure mainly includes a T-shaped retaining wall 10, a T-shaped reinforcing wall 20, and flexible reinforcing piles 30. Several T-shaped retaining walls 10 are arranged around the outside A of the foundation pit, and several T-shaped reinforcing walls 20 are arranged around the inside B of the foundation pit. The top of the T-shaped retaining wall 10 is located at the ground level, and the bottom extends below the bottom of the foundation pit. The top of the T-shaped reinforcing wall 20 is located at the bottom of the foundation pit, and the bottom extends below the bottom of the foundation pit. The bottom of the T-shaped retaining wall 10 is located below the bottom of the T-shaped reinforcing wall 20. Both the T-shaped retaining wall 10 and the T-shaped reinforcing wall 20 are reinforced. The thickness and reinforcement of the T-shaped retaining wall 10 are selected according to the stress calculation, while the T-shaped reinforcing wall 20 can be appropriately optimized to meet the minimum reinforcement ratio. The T-shaped retaining wall 10 and the T-shaped reinforced wall 20 are connected to form a cavity. Several flexible reinforcing piles 30 are installed within the cavity, with the piles filling the entire cavity. Either mixing piles or jet grouting piles can be used. After reinforcement, the soil within the cavity does not require dewatering, while simultaneously meeting the stability requirements of the deep pit sidewalls. The connection between the T-shaped retaining wall 10 and the T-shaped reinforced wall 20 strengthens the overall integrity of the pit reinforcement, further improving the rigidity and bearing capacity of the walls. This fully utilizes the spatial constraint effect of the rigid walls on the pit bottom soil, resulting in clearer mechanical properties and facilitating relevant scientific research and analysis. The flexible reinforcing piles 30, combined with the T-shaped retaining wall 10 and the T-shaped reinforced wall 20, can encompass the scattered and irregular distribution of the deep pit sidewalls, meeting the requirements for reinforcement of the stability of the deep pit sidewall soil due to elevation differences. This further enhances the application of the system in deep foundation pits under extremely stringent environmental protection conditions without reducing economic efficiency.

[0022] like Figures 1-2 As shown, the T-shaped retaining wall 10 includes a main section 101 and a connecting section 102 arranged perpendicularly to each other. The T-shaped reinforced wall 20 includes a main section 201 and a connecting section 202 arranged perpendicularly to each other. The main section 101 of the T-shaped retaining wall 10 is located outside the foundation pit A, and the connecting section 102 of the T-shaped retaining wall 10 is located inside the foundation pit B. Both the main section 201 and the connecting section 202 of the T-shaped reinforced wall 20 are located inside the foundation pit B, and the connecting section 102 of the T-shaped retaining wall 10 is connected to the connecting section 202 of the T-shaped reinforced wall 20. Both the main section 101 and the connecting section 102 of the T-shaped retaining wall 10 are vertically arranged, and the main section 101 and the connecting section 102 of the T-shaped retaining wall 10 are at the same height, that is, the top surface of the main section 101 is level with the top surface of the connecting section 102, and the bottom surface of the main section 101 is level with the bottom surface of the connecting section 102. Both the main body section 201 and the connecting section 202 of the T-shaped reinforced wall 20 are vertically arranged, and the main body section 201 and the connecting section 202 of the T-shaped reinforced wall 20 are at the same height, that is, the top surface of the main body section 201 is level with the top surface of the connecting section 202, and the bottom surface of the main body section 201 is level with the bottom surface of the connecting section 202. The main body sections 101 of the T-shaped retaining wall 10, the main body sections 201 of the T-shaped reinforced wall 20, and the connecting sections 102 of the T-shaped retaining wall 10 and the connecting sections 202 of the T-shaped reinforced wall 20 are all flexibly connected using interlocking pipes.

[0023] The beneficial technical effects of this embodiment are as follows: the grid-type diaphragm wall serves two purposes: foundation pit protection and passive zone reinforcement within the pit. This further enhances the overall integrity of the pit reinforcement, improves the rigidity and bearing capacity of the wall, and makes the mechanical analysis more uniform and clear, fully leveraging the constraint effect of the rigid wall on the soil at the bottom of the pit. The flexible pile reinforcement within the grid cavity can meet the deep pit reinforcement requirements at the edge of the pit. In foundation pits with extremely stringent environmental protection requirements, the deformation control capability of this reinforcement body is further improved, and it also has the capability for deep pit reinforcement. In terms of economic benefits, it is also more outstanding compared to traditional skirt or full-cavity flexible pile reinforcement methods.

[0024] Although the above embodiments have been described in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A reinforced body combining a grid-type ground wall and flexible piles for foundation pit engineering, characterized in that... The reinforced body includes a T-shaped retaining wall, a T-shaped reinforcing wall, and flexible reinforcing piles. Several T-shaped retaining walls are arranged around the outside of the foundation pit, and several T-shaped reinforcing walls are arranged around the inside of the foundation pit. The T-shaped retaining walls and the T-shaped reinforcing walls are connected to form a grid cavity, and several flexible reinforcing piles are arranged in the grid cavity.

2. The reinforced body combining a grid-type ground wall and flexible piles for foundation pit engineering as described in claim 1, characterized in that... Both the T-shaped retaining wall and the T-shaped reinforced wall include a main section and a connecting section arranged perpendicularly to each other. The main section of the T-shaped retaining wall is located outside the foundation pit, and the connecting section of the T-shaped retaining wall is located inside the foundation pit. Both the main section and the connecting section of the T-shaped reinforced wall are located inside the foundation pit, and the connecting section of the T-shaped retaining wall is connected to the connecting section of the T-shaped reinforced wall.

3. The reinforced body combining a grid-type ground wall and flexible piles for foundation pit engineering as described in claim 2, characterized in that... The main body and connecting sections of the T-shaped retaining wall and the T-shaped reinforced wall are both vertically arranged. The main body and connecting sections of the T-shaped retaining wall are at the same height, and the main body and connecting sections of the T-shaped reinforced wall are at the same height.

4. The reinforced body combining a grid-type ground wall and flexible piles for foundation pit engineering as described in claim 2, characterized in that... The main sections of the T-shaped retaining wall, the main sections of the T-shaped reinforced wall, and the connecting sections of the T-shaped retaining wall and the T-shaped reinforced wall are all flexible connections.

5. A reinforced body combining a grid-type ground wall and flexible piles for foundation pit engineering as described in claim 1, characterized in that... The top of the T-shaped retaining wall is located below the ground and the bottom extends to the bottom of the foundation pit. The top of the T-shaped reinforced wall is located below the bottom of the foundation pit and the bottom extends to the bottom of the foundation pit.

6. The reinforced body combining a grid-type ground wall and flexible piles for foundation pit engineering as described in claim 5, characterized in that... The bottom of the T-shaped retaining wall is located below the bottom of the T-shaped reinforced wall.

7. A reinforced body combining a grid-type ground wall and flexible piles for foundation pit engineering as described in claim 1, characterized in that... The flexible reinforcing piles are installed throughout the cavity.

Images