Foundation pit supporting device

Abstract

The utility model discloses a foundation pit supporting device which comprises a pit position, a supporting wall, a cross beam and a triangular supporting frame, the pit position is in a sunken shape, and the side edge of the pit position is provided with a wall face. The supporting wall is fixed on the wall surface, and part of the supporting wall protrudes out of the pit position; the two ends of the cross beam are fixedly connected with the two opposite supporting walls respectively, the cross beam stretches across the upper portion of the pit position, and a plurality of stand columns are arranged between the cross beam and the ground of the pit position; the triangular supporting frames are mutually spliced and combined to form a supporting structure, and the supporting structure is fixedly connected with the bottom face of the pit position, the stand columns and the supporting wall. The supporting structure formed by combining a plurality of triangular supporting frames can better disperse stress, reduce local stress concentration and improve supporting performance.

Description

Technical Field

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

[0002] In existing foundation pits, the support structure, underground structure, and foundation are constructed independently. The support structure only serves to protect the pit wall during the excavation stage. After backfilling, a large portion of the support structure is buried in the soil, separated from the underground structure and foundation, wasting the compressive and tensile strength of the support structure. To address this technical problem, Chinese Patent No. CN207812457U discloses an integrated structure for the foundation of the foundation pit support structure and the underground structure. It includes a single-row rigid composite pile support wall composed of precast corbel piles and surrounding cement-soil piles. The precast corbel piles are equipped with corbels and reverse corbels. The top and middle of the support pile wall are connected to the underground structure (top slab, first basement slab, second basement slab, bottom slab, etc.) through reinforced concrete slabs. The upper part of the inner row of support pile walls is tightly bonded to the basement exterior wall through micro-expansion cement-soil, and the lower part of the inner row of support pile walls is connected to the foundation rigid composite piles through multiple rows of grid-like continuously overlapping cement-soil piles. This utility model utilizes the compressive and tensile strength of the support structure in the building foundation, reducing the number of foundation piles required for compression and tensile strength. The foundation area is expanded from the original base slab area to the entire pit area (increasing the area of ​​the trench and support structure). Measures are taken from the top to the bottom of the support piles to ensure reliable connection with the underground structure and foundation, coordinating load-bearing capacity, resulting in good overall stability and reduced building settlement. However, in the above scheme, the simple fixed segment array may cause local stress concentration, leading to insufficient support. Utility Model Content

[0003] 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 support device that can improve support performance.

[0004] According to a first aspect of the present invention, a foundation pit support device includes:

[0005] The pit is sunken and has walls on its sides;

[0006] A supporting wall is fixed to the wall surface, and part of the supporting wall protrudes above the pit.

[0007] A crossbeam is fixedly connected to two opposing support walls at both ends. The crossbeam spans across the pit, and several columns are set between the crossbeam and the ground of the pit.

[0008] A triangular support frame is provided, and multiple triangular support frames are spliced ​​together to form a support structure. The support structure is fixedly connected to the bottom surface of the pit, the column, and the support wall.

[0009] The foundation pit support device according to the embodiments of the present utility model has at least the following beneficial effects: the support structure composed of multiple triangular support frames can better disperse stress, reduce local stress concentration, and improve support.

[0010] According to some embodiments of the present invention, the triangular support frame is an isosceles triangle, and the support structure includes:

[0011] The support section is composed of four triangular support frames spliced ​​together. The four triangular support frames are connected in a ring around each other in sequence, and the isosceles sides of two adjacent triangular support frames are fixedly connected to make the support section rectangular.

[0012] The upper connecting part is composed of a single triangular support structure, the bottom edge of the upper connecting part is fixedly connected to the upper edge of the support part, and the top corner of the upper connecting part is fixedly connected to the crossbeam;

[0013] The lower connecting part is composed of a single triangular support structure. The bottom edge of the lower connecting part is fixedly connected to the lower edge of the support part, and the top corner of the lower connecting part is fixedly connected to the bottom surface of the pit.

[0014] The bracket has multiple connecting rods fixedly connected to both sides, and the connecting rods on both sides of the bracket are fixedly connected to the supporting wall and the column, respectively.

[0015] According to some embodiments of the present invention, on the same side of the bracket portion, multiple connecting rods are arranged at intervals from top to bottom and are arranged in parallel, and an "X"-shaped reinforcing rod is fixedly connected between two adjacent connecting rods.

[0016] According to some embodiments of the present invention, the connecting rod near the supporting wall and the supporting wall are fixedly connected by a flange.

[0017] According to some embodiments of this utility model, the ground of the pit is fixed with a support pier, and the top corner of the lower connecting part is welded and fixed to the support pier.

[0018] According to some embodiments of this utility model, diagonal bracing rods are fixedly connected between the isosceles side of the lower connecting part and the bottom surface of the pit, and between the isosceles side of the upper connecting part and the crossbeam.

[0019] According to some embodiments of this utility model, a basement structure is also included, the basement structure comprising:

[0020] The underground base slab is fixed to the crossbeam;

[0021] An underground wall is provided around the underground floor slab, and the underground wall is fixedly connected to the supporting wall;

[0022] The underground ceiling is fixed to the upper edge of the underground wall.

[0023] According to some embodiments of this utility model, multiple support columns are provided between the underground floor slab and the underground roof surface, and multiple support beams are provided between the support columns and the underground floor slab, as well as between the underground roof surface.

[0024] According to some embodiments of the present invention, a fixing pit is provided on the ground of the pit location, and the column is inserted into the fixing pit.

[0025] According to some embodiments of the present invention, on the vertical cross section of the foundation pit support device, the bottom surface of the crossbeam is provided with two arched concave portions, the two arched concave portions are spaced apart, and the column is fixed between the two arched concave portions.

[0026] 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

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0028] Figure 1 This is a schematic diagram of the foundation pit support device according to an embodiment of the present utility model;

[0029] Figure 2 This is a schematic diagram showing the connection between the crossbeam and the support wall of the foundation pit support device according to an embodiment of this utility model.

[0030] 100. Pit location; 110. Wall surface; 120. Support pier; 130. Fixed pit;

[0031] 200. Supporting wall;

[0032] 300. Horizontal beam; 310. Column; 320. Arc-shaped recess; 330. Reinforcing beam;

[0033] 400. Support structure; 410. Bracket part; 411. Connecting rod; 412. Reinforcing rod; 420. Upper connecting part; 430. Lower connecting part; 401. Triangular support frame;

[0034] 500, diagonal brace;

[0035] 600. Basement structure; 610. Basement floor slab; 620. Basement walls; 630. Basement ceiling; 640. Supporting columns; 650. Supporting beams; Detailed Implementation

[0036] 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.

[0037] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0038] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0039] 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.

[0040] Reference Figure 1 The foundation pit support device of this utility model embodiment includes a pit 100, a support wall 200, a crossbeam 300, and a triangular support frame 401. The pit 100 is sunken and has a wall 110 on its side. The support wall 200 is fixed to the wall 110 and a portion of the support wall 200 protrudes above the pit 100. The two ends of the crossbeam 300 are fixedly connected to two opposite support walls 200, and the crossbeam 300 spans across the pit 100. Several columns 310 are set between the crossbeam 300 and the ground of the pit 100. The triangular support frame 401 is spliced ​​together to form a support structure 400. The support structure 400 is fixedly connected to the bottom surface of the pit 100, the columns 310, and the support wall 200.

[0041] In practical use, the vertical support network of support wall 200-beam 300-column 310, combined with the diagonal reinforcement of triangular support frame 401, forms a spatial truss structure, realizing the three-dimensional dispersion and transmission of lateral earth pressure and vertical load of the foundation pit. The splicing design of triangular support frame 401 can effectively transmit structural stress along the diagonal direction to support wall 200 and column 310, reducing stress concentration. In addition, triangular support frame 401 can be used as a prefabricated component, and multiple triangular support frames 401 can be fixed together by welding, without the need for on-site welding manufacturing of triangular support frame 401, which can reduce the amount of welding work on the construction site and improve work efficiency.

[0042] In summary, the support structure 400, composed of multiple triangular support frames 401, can better disperse stress, reduce local stress concentration, and improve support.

[0043] In some embodiments, the triangular support frame 401 is an isosceles triangle. The support structure 400 includes a support portion 410, an upper connecting portion 420, and a lower connecting portion 430. The support portion 410 is formed by splicing four triangular support frames 401, which are sequentially and adjacently connected around each other. The isosceles sides of two adjacent triangular support frames 401 are fixedly connected to make the support portion 410 rectangular. The upper connecting portion 420 is formed by a single triangular support frame 401, and the base of the upper connecting portion 420 is connected to the support portion. The upper edge of 410 is fixedly connected, and the top corner of the upper connecting part 420 is fixedly connected to the crossbeam 300; the lower connecting part 430 is composed of a single triangular support frame 401, the bottom edge of the lower connecting part 430 is fixedly connected to the lower edge of the support part 410, and the top corner of the lower connecting part 430 is fixedly connected to the bottom surface of the pit 100; wherein, multiple connecting rods 411 are fixedly connected to both sides of the support part 410, and the connecting rods 411 on both sides of the support part 410 are fixedly connected to the support wall 200 and the column 310 respectively.

[0044] In this embodiment, the two sides of the entire support structure 400 are fixedly connected to the column 310 and the support wall 200 through the connecting rod 411, so as to effectively transfer the load to both sides. The upper connecting part 420 and the lower connecting part 430 are used to bear the pressure from above and below, and transfer the load to the middle support part 410, and the support part 410 distributes the load to the surrounding area to improve the bearing capacity. In addition, in order to further improve the resistance to lateral loads, diagonal bracing rods 500 are fixedly connected between the isosceles side of the lower connecting part 430 and the bottom surface of the pit 100, and between the isosceles side of the upper connecting part 420 and the crossbeam 300.

[0045] Specifically, the top of the upper connecting part 420 is directly welded and fixed to the crossbeam 300, while regarding the lower connecting part 430, a support pier 120 is fixed to the ground of the pit 100, and the top corner of the lower connecting part 430 is welded and fixed to the support pier 120.

[0046] In some embodiments, the function of the connecting rod 411 is to transmit load. In order to improve the load capacity of the connecting rod 411, multiple connecting rods 411 are arranged at intervals from top to bottom and in parallel on the same side of the support portion 410. An "X"-shaped reinforcing rod 412 is fixedly connected between two adjacent connecting rods 411 to facilitate load distribution. Preferably, the connecting rods 411 near the support wall 200 are fixedly connected to the support wall 200 by a flange.

[0047] In some embodiments, the foundation pit support device further includes a basement structure 600, which includes an underground floor slab 610, an underground wall 620, and an underground top surface 630. The underground floor slab 610 is fixed to the crossbeam 300; the underground wall 620 is arranged around the underground floor slab 610 and is fixedly connected to the support wall 200; the underground top surface 630 is fixed to the upper edge of the underground wall 620.

[0048] Among them, as the supporting structure for the entire basement structure 600, multiple supporting columns 640 are set between the underground floor slab 610 and the underground top surface 630, and multiple supporting beams 650 are set between the supporting columns 640 and the underground floor slab 610, as well as between the underground top surface 630.

[0049] In some embodiments, a fixing pit 130 is provided in the ground of the pit 100, and the column 310 is inserted into the fixing pit 130 for positioning and fixing the column 310.

[0050] It is worth mentioning that, in the vertical section of the foundation pit support device, the bottom surface of the crossbeam 300 is provided with two arched recesses 320, which are spaced apart, and the column 310 is fixed between the two arched recesses 320. The arched structure can improve the load-bearing capacity and further improve the support strength of the entire foundation pit support device.

[0051] It is worth mentioning that, referring to Figure 2 A reinforcing beam 330 is also fixedly connected between the crossbeam 300 and the supporting wall 200.

[0052] 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 support device, characterized in that, include: The pit (100) is sunken and has a wall (110) on its side; A support wall (200) is fixed to the wall surface (110), and part of the support wall (200) protrudes above the pit (100); A crossbeam (300) is fixedly connected to two opposing support walls (200) at both ends. The crossbeam (300) spans across the pit (100) above it. Several columns (310) are provided between the crossbeam (300) and the ground of the pit (100). A triangular support frame (401) is formed by splicing multiple triangular support frames (401) together to form a support structure (400). The support structure (400) is fixedly connected to the bottom surface of the pit (100), the column (310), and the support wall (200).

2. The foundation pit support device according to claim 1, characterized in that, The triangular support frame (401) is an isosceles triangle, and the support structure (400) includes: The support section (410) is composed of four triangular support frames (401) spliced ​​together. The four triangular support frames (401) are connected in a ring around each other in sequence. The isosceles sides of two adjacent triangular support frames (401) are fixedly connected so that the support section (410) is rectangular. The upper connecting part (420) is composed of a single triangular support frame (401), the bottom edge of the upper connecting part (420) is fixedly connected to the upper edge of the support part (410), and the top corner of the upper connecting part (420) is fixedly connected to the crossbeam (300); The lower connecting part (430) is composed of a single triangular support frame (401). The bottom edge of the lower connecting part (430) is fixedly connected to the lower edge of the support part (410), and the top corner of the lower connecting part (430) is fixedly connected to the bottom surface of the pit (100). The bracket (410) has multiple connecting rods (411) fixedly connected to both sides. The connecting rods (411) on both sides of the bracket (410) are fixedly connected to the support wall (200) and the column (310), respectively.

3. The foundation pit support device according to claim 2, characterized in that, On the same side of the bracket (410), multiple connecting rods (411) are arranged at intervals from top to bottom and are arranged in parallel. An "X"-shaped reinforcing rod (412) is fixedly connected between two adjacent connecting rods (411).

4. The foundation pit support device according to claim 2, characterized in that, The connecting rod (411) near the support wall (200) is fixedly connected to the support wall (200) by a flange.

5. The foundation pit support device according to claim 2, characterized in that, The pit (100) is fixed to the ground with a support pier (120), and the top corner of the lower connecting part (430) is welded to the support pier (120).

6. The foundation pit support device according to claim 2, characterized in that, Diagonal bracing rods (500) are fixedly connected between the isosceles side of the lower connecting part (430) and the bottom surface of the pit (100), and between the isosceles side of the upper connecting part (420) and the crossbeam (300).

7. The foundation pit support device according to claim 1, characterized in that, It also includes a basement structure (600), said basement structure (600) comprising: The underground base plate (610) is fixed to the crossbeam (300); An underground wall (620) is provided around the underground base plate (610), and the underground wall (620) and the supporting wall (200) are fixedly connected; The underground top surface (630) is fixed to the upper edge of the underground wall surface (620).

8. The foundation pit support device according to claim 7, characterized in that, Multiple support columns (640) are provided between the underground floor slab (610) and the underground roof surface (630), and multiple support beams (650) are provided between the support columns (640) and the underground floor slab (610), as well as between the underground roof surface (630).

9. The foundation pit support device according to claim 1, characterized in that, The pit (100) has a fixed pit (130) on the ground, and the column (310) is inserted into the fixed pit (130).

10. The foundation pit support device according to claim 1, characterized in that, On the vertical section of the foundation pit support device, the bottom surface of the crossbeam (300) is provided with two arched concave portions (320), the two arched concave portions (320) are spaced apart, and the column (310) is fixed between the two arched concave portions (320).

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