Foundation pit reinforcing structure

Abstract

The utility model discloses a foundation pit reinforcing structure and belongs to the technical field of foundation reinforcement, the foundation pit reinforcing structure comprises two side wall supporting bodies, two skirt reinforcing bodies and a plurality of stripping reinforcing bodies, the two side wall supporting bodies are respectively connected with two side walls of a foundation pit; the two skirt reinforcing bodies are arranged at the bottom of the foundation pit and located between the two side wall supporting bodies, and the two skirt reinforcing bodies are connected with the two side wall supporting bodies correspondingly; the multiple stripping reinforcing bodies are arranged at the bottom of the foundation pit and located between the two skirt reinforcing bodies, the multiple stripping reinforcing bodies are arranged at intervals, and the two ends, in the length direction, of the stripping reinforcing bodies are connected with the two skirt reinforcing bodies correspondingly.

Description

Technical Field

[0001] This utility model relates to the field of foundation reinforcement technology, and in particular to a foundation pit reinforcement structure. Background Technology

[0002] In construction projects, when deep foundation pits are supported by retaining piles, the presence of a weak bottom layer in the pit area can lead to increased earth pressure on the retaining piles as the excavation depth increases. The weak soil layer causes deformation of the soil in the passive earth pressure zone, resulting in harmful risks such as displacement of the retaining piles and heave of the soil at the bottom of the pit.

[0003] In related technologies, the common construction structure for foundation pits is to increase the length of the support piles and reinforce the soft soil. However, this construction structure generally suffers from low construction efficiency and high cost. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a foundation pit reinforcement structure that reduces the risk of large displacement of the sidewall supports and soil heave at the bottom of the foundation pit, while also offering high construction efficiency and low cost.

[0005] The foundation pit reinforcement structure according to an embodiment of the present utility model includes: two side wall supports, which are respectively connected to the two side walls of the foundation pit; two skirt reinforcement bodies, which are disposed at the bottom of the foundation pit and located between the two side wall supports, and the two skirt reinforcement bodies are respectively connected to the two side wall supports; and multiple strip reinforcement bodies, which are all disposed at the bottom of the foundation pit and located between the two skirt reinforcement bodies, the multiple strip reinforcement bodies are arranged at intervals, and the two ends of the strip reinforcement bodies along the length direction are respectively connected to the two skirt reinforcement bodies.

[0006] The foundation pit reinforcement structure according to the embodiment of this utility model has at least the following beneficial effects: two side wall supports are located on the inner side of the foundation pit and are respectively connected to the two side walls of the foundation pit, thereby providing support for the foundation pit. The foundation pit reinforcement structure also includes skirt reinforcement and strip reinforcement, both of which are located at the bottom of the foundation pit. The two skirt reinforcements are respectively connected to the two side wall supports, while multiple strip reinforcements are located between the two skirt reinforcements. The two ends of each strip reinforcement along its length are respectively connected to the two skirt reinforcements. That is, the foundation pit reinforcement structure, through the skirt reinforcement and strip reinforcement... The solid supports provide structural support to the lower ends of the two sidewall supports, thereby limiting their displacement towards each other and reducing the risk of large displacements. The strip reinforcement and skirt reinforcement are connected to the lower end of the pit to resist deformation at the bottom of the pit and reduce the risk of soil heave caused by deformation of the soft soil layer. Multiple strip reinforcements are arranged at intervals, with a gap between adjacent strip reinforcements. This pit reinforcement structure, through the cooperation of skirt reinforcement and strip reinforcement, helps to improve construction efficiency and reduce the cost of the pit reinforcement structure.

[0007] According to some embodiments of the present invention, one end of the skirt reinforcement body along the width direction is connected to the side wall support body, and the skirt reinforcement body includes a plurality of first blocks arranged in a row, and the plurality of first blocks are spliced ​​together sequentially along their width direction.

[0008] Specifically, one end of the skirt reinforcement body along the width direction is connected to the side wall support body to achieve full contact between the skirt reinforcement body and the side wall support body, which is beneficial to enhance the support effect of the side wall support body. The skirt reinforcement body includes multiple first blocks arranged in a row. The multiple first blocks are spliced ​​together sequentially along the width direction to form the skirt reinforcement body. The splicing method of the first blocks is beneficial to improve the construction accuracy and enhance the support effect of the skirt reinforcement body.

[0009] According to some embodiments of the present invention, the strip-reinforced solid includes a plurality of second blocks arranged in a row, and the plurality of second blocks are spliced ​​together sequentially along their length direction.

[0010] Specifically, the strip reinforcement body includes multiple second blocks arranged in a row. These second blocks are spliced ​​together sequentially along their length to form the strip reinforcement body. The splicing method of the second blocks helps to improve the construction accuracy and enhance the support effect of the skirt reinforcement body.

[0011] According to some embodiments of this utility model, the spacing between two adjacent strip-reinforced solids is consistent with the width of the second block.

[0012] Specifically, the spacing between two adjacent strip-shaped reinforcement bodies is consistent with the width of the second block. While ensuring the support of the side wall support and the resistance to the heave of the bottom soil, it can reduce the construction difficulty of the foundation pit reinforcement structure, making the construction efficiency of the foundation pit reinforcement structure high, the cost low, and the economy better.

[0013] According to some embodiments of this utility model, the length of the first block and the second block is 5m, and the width of the first block and the second block is 3m.

[0014] Specifically, the length of the first and second blocks is 5m and the width of the first and second blocks is 3m, so as to achieve a smooth transition in construction between the skirt reinforcement and the strip reinforcement. The appropriate specifications of the first and second blocks help to improve the strength and deformation resistance of the skirt reinforcement and the strip reinforcement.

[0015] According to some embodiments of this utility model, the skirt reinforcement and / or strip reinforcement are composed of a curing agent and soil.

[0016] Specifically, the skirt reinforcement and / or strip reinforcement are composed of a curing agent and soil. That is, the foundation pit reinforcement structure can be formed by in-situ curing process. The curing agent is mixed with the soft soil at the bottom of the foundation pit by stirring and spraying, thereby forming the skirt reinforcement and / or strip reinforcement. This helps to reduce construction difficulty and cost, effectively support the side wall support, and reduce the risk of soil heave at the bottom.

[0017] According to some embodiments of the present invention, the foundation pit reinforcement structure further includes a first support column, the two ends of which are arranged laterally and respectively connected to the upper ends of the two side wall supports.

[0018] Specifically, the two ends of the first support column are arranged laterally and connected to the upper ends of the side wall supports respectively, which helps to enhance the support performance of the two side wall supports, helps to limit the relative displacement of the two side wall supports, and helps to improve the support effect of the foundation pit reinforcement structure on the foundation pit.

[0019] According to some embodiments of this utility model, the foundation pit reinforcement structure also includes columns, the upper end of which is connected to the first support column, and the lower end of which is connected to the skirt reinforcement body or the strip reinforcement body.

[0020] Specifically, the foundation pit reinforcement structure also includes columns. The upper end of the columns is connected to the first support column, and the lower end of the columns is connected to the skirt reinforcement or strip reinforcement. The installation of columns helps to fix the relative positional relationship between the first support column and the skirt reinforcement or strip reinforcement, thereby improving the overall stability of the foundation pit reinforcement structure and enhancing its support effect on the foundation pit.

[0021] According to some embodiments of the present invention, the foundation pit reinforcement structure further includes a second support column, which is located between the first support column and the skirt reinforcement body or the strip reinforcement body. The two ends of the second support column are arranged laterally and are respectively connected to two side wall supports.

[0022] Specifically, the foundation pit reinforcement structure also includes a second support column, which is located between the first support column and the skirt reinforcement or strip reinforcement. The two ends of the second support column are arranged laterally and connected to the two side wall supports respectively. This is beneficial to enhance the support performance of the two side wall supports, to limit the relative displacement of the two side wall supports, and to improve the support effect of the foundation pit reinforcement structure on the foundation pit.

[0023] According to some embodiments of the present invention, the sidewall support includes a plurality of cast-in-place piles and a plurality of jet grouting piles arranged in a row, the jet grouting piles being located outside the cast-in-place piles, and the plurality of jet grouting piles jointly defining a water-stop curtain.

[0024] Specifically, the sidewall support structure includes multiple cast-in-place piles and multiple jet grouting piles arranged in a row. The arrangement of multiple cast-in-place piles helps to support the sidewalls of the foundation pit, thereby improving the stability of the foundation pit. The multiple jet grouting piles are arranged in a row and located outside the cast-in-place piles. The multiple jet grouting piles together define the water-stop curtain, which can play a supporting and water-stopping role, effectively preventing the escape of the curing agent or the grout of the solidified body, and effectively limiting the lateral displacement of the soil layer.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0027] Figure 1 This is a longitudinal structural diagram of a foundation pit reinforcement structure according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the planar structure of a foundation pit reinforcement structure according to an embodiment of the present invention.

[0029] Icon labels:

[0030] 100. Foundation pit;

[0031] 200. Side wall support; 210. Cast-in-place pile; 220. Jet grouting pile;

[0032] 300. Skirt reinforcement solid; 310. First block;

[0033] 400. Solidification by stripping; 410. Second block;

[0034] 500. First support column;

[0035] 600, Second support column;

[0036] 700. Column. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the 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.

[0039] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0040] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0041] In foundation pit engineering in soft soil areas, soft soil has low mechanical properties such as internal friction angle and cohesion, and is characterized by high compressibility, poor permeability, low strength, large deformation, and rheological properties. The soil at the bottom of the deep foundation pit 100 has little resistance to the external earth pressure of the support structure, which can cause soil heave at the bottom of the pit and excessive lateral displacement of the support structure. This utility model proposes a foundation pit reinforcement structure that can reduce the risk of large displacement of the sidewall support 200 and soil heave at the bottom of the foundation pit 100, and it also has high construction efficiency and low cost.

[0042] Reference Figure 1 and Figure 2 As shown, an embodiment of the foundation pit reinforcement structure of this utility model is applied to the support of foundation pit 100, and is particularly suitable for use in scenarios where the bottom of foundation pit 100 is soft soil. The foundation pit reinforcement structure includes: two side wall supports 200, two skirt reinforcement bodies 300, and multiple strip reinforcement bodies 400.

[0043] Reference Figure 1 and Figure 2 As shown, two side wall supports 200 are located inside the foundation pit 100, and the two side wall supports 200 are respectively connected to the two side walls of the foundation pit 100, thereby playing a supporting role for the side walls of the foundation pit 100, which is conducive to improving the stability of the foundation pit 100 and limiting the lateral displacement of the soil layer on the side of the foundation pit 100.

[0044] Reference Figure 1 and Figure 2 As shown, specifically, the sidewall support 200 includes multiple cast-in-place piles 210 and multiple jet grouting piles 220 arranged in a row. The jet grouting piles 220 are located outside the cast-in-place piles 210, and the multiple jet grouting piles 220 together define the water-stop curtain. The arrangement of the multiple cast-in-place piles 210 is beneficial to supporting the sidewall of the foundation pit 100, thereby improving the stability of the foundation pit 100. The multiple jet grouting piles 220 are arranged in a row and located outside the cast-in-place piles 210. The multiple jet grouting piles 220 interlock with each other to jointly define the water-stop curtain. The water-stop curtain can play a supporting and water-stopping role, effectively preventing the escape of the curing agent or the grout of the solidified body, and effectively limiting the lateral displacement of the soil layer.

[0045] Reference Figure 1 and Figure 2As shown, two skirt reinforcement bodies 300 and multiple strip reinforcement bodies 400 are all located at the bottom of the foundation pit 100, with the two skirt reinforcement bodies 300 situated between the two side wall supports 200. Each skirt reinforcement body 300 is connected to one of the two side wall supports 200. Specifically, the skirt reinforcement body 300 is rectangular in shape, with one end along its width connected to the side wall support 200, ensuring full contact between the skirt reinforcement body 300 and the side wall support 200, thus enhancing the support effect on the side wall support 200. Furthermore, the length of the skirt reinforcement body 300 is the same as the length of the side wall support 200, further enhancing the support effect on the side wall support 200.

[0046] Reference Figure 1 and Figure 2 As shown, multiple pull-out reinforcements 400 are located between two skirt reinforcements 300. The following description takes the two skirt reinforcements 300 arranged left and right as an example. The two ends of the pull-out reinforcements 400 are set along the left and right sides, and the multiple pull-out reinforcements 400 are arranged along the front and back direction, with a gap between adjacent pull-out reinforcements 400. The two ends of the pull-out reinforcements 400 along the length direction are respectively connected to the two skirt reinforcements 300.

[0047] Reference Figure 1 and Figure 2 As shown, the foundation pit reinforcement structure, through the skirt reinforcement 300 and the strip reinforcement 400, can support the lower ends of the two side wall supports 200, thereby limiting the displacement of the lower ends of the two side wall supports 200 in the direction of moving closer to each other, and reducing the risk of large displacement of the side wall supports 200. The strip reinforcement 400 and the skirt reinforcement 300 are connected to the lower end of the foundation pit 100, reducing the risk of the bottom soil heave caused by deformation of the soft soil layer.

[0048] Reference Figure 1 and Figure 2 As shown, compared to the full-area reinforcement process at the bottom of the foundation pit 100, the multiple strip reinforcement bodies 400 of the foundation pit reinforcement structure provided in this embodiment are arranged at intervals, that is, there is a gap between two adjacent strip reinforcement bodies 400. Through the cooperation of the skirt reinforcement body 300 and the strip reinforcement body 400, the foundation pit reinforcement structure has high integrity and strong targeting of the passive earth pressure zone of the foundation pit 100, and the reinforcement effect of the foundation pit 100 is significant. It ensures the balance of earth pressure transmission on both sides of the side wall support 200, prevents soil heave from affecting the bottom quality of the foundation pit 100, and is conducive to improving construction efficiency, reducing the cost of the foundation pit reinforcement structure, and is more economical.

[0049] Reference Figure 1 and Figure 2As shown, it can be understood that the skirt reinforcement body 300 includes a plurality of first blocks 310 arranged in a row. The plurality of first blocks 310 are spliced ​​together in sequence along their width direction to form the skirt reinforcement body 300. The splicing method of the first blocks 310 helps to improve the construction accuracy and enhance the support effect of the skirt reinforcement body 300.

[0050] Reference Figure 1 and Figure 2 As shown, the skirt reinforcement 300 is composed of a curing agent and soil. That is, the foundation pit reinforcement structure can be formed by in-situ curing process. The curing agent is mixed with the soft soil at the bottom of the foundation pit 100 by stirring and spraying, thereby forming the skirt reinforcement 300. This helps to reduce construction difficulty and construction cost, and can effectively support the side wall support 200 and reduce the risk of bottom soil heave.

[0051] Reference Figure 1 and Figure 2 As shown, it can be understood that, specifically, the strip reinforcement 400 includes multiple second blocks 410 arranged in a row. The multiple second blocks 410 are spliced ​​together sequentially along their length to form the strip reinforcement 400. The splicing method of the second blocks 410 helps to improve the construction accuracy and enhance the support effect of the skirt reinforcement 300.

[0052] Reference Figure 1 and Figure 2 As shown, the strip reinforcement body 400 is composed of a curing agent and soil. That is, the foundation pit reinforcement structure can be formed by in-situ curing process. The curing agent is mixed with the soft soil at the bottom of the foundation pit 100 by stirring and spraying, thereby forming the strip reinforcement body 400. This helps to reduce construction difficulty and construction cost, and can effectively support the side wall support body 200 and reduce the risk of bottom soil heave.

[0053] Reference Figure 1 and Figure 2 As shown, specifically, construction workers can attach a curing head to the boom of a rotary drilling rig. The curing head is connected to a slurry supply system, which can simultaneously supply multiple curing agents, including cement, with a maximum pressure of no less than 3 MPa. During construction, the curing head operates forward, gradually penetrating the soil at the bottom of the mixing pit and spraying the curing agent until it reaches the bottom of the foundation curing depth. Then, the curing head reverses direction, slowly lifting and spraying the curing agent, thus achieving mixing between the curing agent and the soil.

[0054] Reference Figure 1 and Figure 2As shown, the stirring lifting or lowering rate of the curing head can be controlled at 10s to 20s per meter, and the spraying rate of the curing agent can be controlled at 80kg / min to 120kg / min. For each construction point, it needs to be moved back and forth 2-3 times in the vertical direction.

[0055] Reference Figure 1 and Figure 2 As shown, it should be noted that the curing agent can be a mixture of cement-based and organic compound-based agents, etc.

[0056] Reference Figure 1 and Figure 2 As shown, it is understandable that the spacing between two adjacent strip reinforcement bodies 400 is consistent with the width of the second block 410. While ensuring the support of the side wall support body 200 and the resistance to the heave of the bottom soil, it can reduce the construction difficulty of the foundation pit reinforcement structure, making the foundation pit reinforcement structure more efficient, less expensive, and more economical.

[0057] Reference Figure 1 and Figure 2 As shown, specifically, the length of the first block 310 and the second block 410 is 5m, and the width of the first block 310 and the second block 410 is 3m, so as to achieve a smooth transition in construction between the skirt reinforcement 300 and the strip reinforcement 400. By setting the first block 310 and the second block 410 with appropriate specifications, it is beneficial to improve the strength and deformation resistance of the skirt reinforcement 300 and the strip reinforcement 400.

[0058] Reference Figure 1 and Figure 2 As shown, it is understood that, specifically, the two ends of the first support column 500 are arranged laterally and connected to the upper ends of the side wall support 200 respectively, which is beneficial to enhance the support performance of the two side wall supports 200, to limit the relative displacement of the two side wall supports 200, and to improve the support effect of the foundation pit reinforcement structure on the foundation pit 100.

[0059] Reference Figure 1 and Figure 2 As shown, specifically, the first support column 500 can be made of concrete, and multiple first support columns 500 are provided. The multiple first support columns 500 are arranged in a front-to-back interval, which is conducive to enhancing the support effect on the two side wall support bodies 200. While supporting the side wall support bodies 200, it is also conducive to completing the construction work inside the foundation pit 100.

[0060] Reference Figure 1 and Figure 2As shown, it can be understood that the foundation pit reinforcement structure also includes a column 700. The upper end of the column 700 is connected to the first support column 500, and the lower end of the column 700 is connected to the skirt reinforcement 300 or the strip reinforcement 400. The setting of the column 700 helps to fix the relative positional relationship between the first support column 500 and the skirt reinforcement 300 or the strip reinforcement 400, so as to improve the overall stability of the foundation pit reinforcement structure and improve the support effect of the foundation pit reinforcement structure on the foundation pit 100.

[0061] Reference Figure 1 and Figure 2 As shown, the column 700 can be made of steel, which can be recycled and reused. Multiple columns 700 are set up, which helps to enhance the connection stability of the foundation pit reinforcement structure.

[0062] Reference Figure 1 and Figure 2 As shown, it is understood that the foundation pit reinforcement structure also includes a second support column 600. The second support column 600 is located between the first support column 500 and the skirt reinforcement 300 or the strip reinforcement 400. The two ends of the second support column 600 are arranged laterally and connected to the two side wall supports 200 respectively. This is beneficial to enhance the support performance of the two side wall supports 200, to limit the relative displacement of the two side wall supports 200, and to improve the support effect of the foundation pit reinforcement structure on the foundation pit 100.

[0063] Reference Figure 1 and Figure 2 As shown, the second support column 600 can be made of steel and can be recycled and reused. Multiple second support columns 600 are provided and arranged in a front-to-back interval, which helps to enhance the support effect on the two side wall supports 200. While supporting the side wall supports 200, it is also helpful to complete the construction work inside the foundation pit 100.

[0064] Reference Figure 1 and Figure 2 As shown, during construction, after the side walls and side wall supports 200 of the foundation pit 100 are completed, the construction personnel can use the on-site curing method to construct the skirt reinforcement 300 and the strip reinforcement 400 in the passive earth pressure zone within the bottom area of ​​the foundation pit 100. The skirt reinforcement 300 on both sides can be constructed first, and then the strip reinforcement 400 in the middle can be constructed. After the construction is completed, curing is carried out, and then the construction of the first support column 500, the second support column 600 and the column 700 can be carried out.

[0065] Reference Figure 1 and Figure 2As shown, it is understandable that during construction, when workers apply the 300mm solid reinforcement to the skirt and the 400mm solid reinforcement to the strip, the following steps can be used:

[0066] 1. Remove surface debris, mud, and other impurities, and level the site after cleaning to facilitate subsequent construction.

[0067] 2. Construction shall be carried out by first constructing the side skirt reinforcement 300 and then constructing the central strip reinforcement 400. The side skirt reinforcement 300 and the strip reinforcement 400 shall be cured in sections. That is, the side skirt reinforcement 300 shall be formed by splicing multiple first blocks 310 and the strip reinforcement 400 shall be formed by splicing multiple second blocks 410. There shall be a double overlap width of not less than 20cm at the splicing point of the first block 310 and the second block 410. There shall also be a double overlap width of not less than 20cm at the splicing point of the second block 410 and the first block 310. The reinforcement depth is 5m.

[0068] By adding a curing head to the rotary drilling rig arm, which is connected to a slurry supply system, multiple curing agents such as cement can be supplied simultaneously, and the maximum pressure of the slurry supply system is no less than 3MPa. The curing head can operate forward to gradually penetrate the soil at the bottom of the mixing pit and spray curing agent until it reaches the bottom of the foundation curing depth. After that, the curing head reverses its operation, slowly lifting and mixing the soil while spraying curing agent, thereby achieving mixing of the curing agent and the soil.

[0069] 3. One to two days after the mixing of the construction area is completed, pre-compaction or other foundation treatment measures can be taken. The thickness of the plain soil backfill for pre-compaction can be about 0.5m. After pre-compaction, leveling and curing should be carried out to ensure the integrity of the mixed slab and the compaction of the surface soil. The curing time should be more than 7 days.

[0070] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A foundation pit reinforcement structure, characterized in that, include: Two side wall supports (200) are respectively connected to the two side walls of the foundation pit (100); Two skirt reinforcement bodies (300) are provided at the bottom of the foundation pit (100) and located between the two side wall supports (200), and the two skirt reinforcement bodies (300) are respectively connected to the two side wall supports (200); Multiple strip reinforcement bodies (400) are provided at the bottom of the foundation pit (100) and located between the two skirt reinforcement bodies (300). The multiple strip reinforcement bodies (400) are arranged in a spaced-apart manner, and the two ends of the strip reinforcement bodies (400) along the length direction are respectively connected to the two skirt reinforcement bodies (300).

2. The foundation pit reinforcement structure according to claim 1, characterized in that: One end of the skirt reinforcement body (300) along the width direction is connected to the side wall support (200). The skirt reinforcement body (300) includes a plurality of first blocks (310) arranged in a row, and the plurality of first blocks (310) are spliced ​​together in sequence along their width direction.

3. The foundation pit reinforcement structure according to claim 2, characterized in that: The strip-reinforced solid (400) includes a plurality of second blocks (410) arranged in a row, and the plurality of second blocks (410) are spliced ​​together sequentially along their length direction.

4. The foundation pit reinforcement structure according to claim 3, characterized in that: The spacing between two adjacent strip-reinforced solids (400) is consistent with the width of the second block (410).

5. The foundation pit reinforcement structure according to claim 3, characterized in that: The length of the first block (310) and the second block (410) is 5m, and the width of the first block (310) and the second block (410) is 3m.

6. The foundation pit reinforcement structure according to claim 1, characterized in that: The skirt reinforcement (300) and / or the strip reinforcement (400) are composed of a curing agent and soil.

7. The foundation pit reinforcement structure according to claim 1, characterized in that: It also includes a first support column (500), the two ends of which are arranged laterally and connected to the upper ends of the two side wall supports (200) respectively.

8. The foundation pit reinforcement structure according to claim 7, characterized in that: It also includes a column (700), the upper end of which is connected to the first support column (500), and the lower end of which is connected to the skirt reinforcement (300) or the drawstring reinforcement (400).

9. The foundation pit reinforcement structure according to claim 7, characterized in that: It also includes a second support column (600), which is located between the first support column (500) and the skirt reinforcement (300) or the drawstring reinforcement (400). The two ends of the second support column (600) are arranged laterally and are respectively connected to the two side wall supports (200).

10. The foundation pit reinforcement structure according to claim 1, characterized in that: The sidewall support (200) includes a plurality of cast-in-place piles (210) and a plurality of jet grouting piles (220) arranged in a row. The jet grouting piles (220) are located outside the cast-in-place piles (210), and the plurality of jet grouting piles (220) together define a water-stop curtain.

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