A foundation pit support structure and construction method thereof

Abstract

The present invention belongs to the field of foundation pit support, especially a foundation pit support structure and its construction method. In view of the existing problems, the following scheme is proposed, which includes a polygonal retaining wall panel, multiple faces of the retaining wall panel are fixedly connected with support seats, and a support mechanism is installed between two adjacent support seats; the support mechanism includes a horizontal plate, which is fixed at the corner of the retaining wall panel and located between two support seats, and the surface of the horizontal plate is fixedly connected with a vertical plate, and one side of the vertical plate is rotatably connected with a hydraulic cylinder. The present invention significantly enhances the overall stability through a clever double-layer support system and connection mechanism design, and can effectively cope with local deformation of the foundation pit. The structure ensures stable support strength and direction, and prevents the connection seat from tilting through an anti-slip component, further improving stability. Its high adaptability enables flexible adjustment according to the shape and size of the foundation pit, while simplifying the installation and maintenance process, reducing construction difficulty and cost.

Description

Technical Field

[0001] The invention belongs to the field of foundation pit support and relates to a foundation pit support structure and a construction method thereof. Background Art

[0002] In the field of civil engineering, foundation pit support is an important part of ensuring construction safety and the stability of the surrounding environment. Traditional foundation pit support structures are often designed for foundation pits of specific shapes and are difficult to adapt to foundation pits of different shapes and sizes, resulting in low construction efficiency and high costs. Especially when facing polygonal or irregular shaped foundation pits, existing support structures often find it difficult to achieve stable and effective support.

[0003] In addition, the foundation pit support structure is exposed to the outdoor environment for a long time and is susceptible to natural factors such as wind and sun, which may cause corrosion and damage to various components. At the same time, the foundation pit itself may also undergo local deformation due to changes in geological conditions or construction factors, so it is necessary to replace or repair damaged parts. However, when replacing or repairing damaged parts, it is difficult to ensure effective support effects and accidents are prone to occur, which will greatly increase the difficulty and cost of replacing or repairing damaged parts.

[0004] Therefore, there is an urgent need for a support structure that can adapt to foundation pits of different shapes and sizes. The structure must be easy to adjust, stable and strong, and adaptable to foundation pit deformation. At the same time, considering the convenience and safety in actual construction, the support structure should also be easy to install, disassemble and maintain to reduce construction difficulty and cost. Summary of the invention

[0005] In view of this, in order to solve the problems existing in the above-mentioned existing foundation pit supporting structures, the present invention provides a foundation pit supporting structure and a construction method thereof.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A foundation pit support structure, comprising retaining wall panels installed on multiple surfaces inside the foundation pit, the shape of the foundation pit is circular or polygonal, multiple surfaces of the retaining wall panels are fixedly connected with support seats, and support mechanisms are installed between two adjacent support seats;

[0008] The supporting mechanism includes a horizontal plate, which is fixed at the corner of the retaining wall panel and located between two supporting seats. The surface of the horizontal plate is fixedly connected to a vertical plate, one side of the vertical plate is rotatably connected to a hydraulic cylinder, one end of the hydraulic cylinder piston rod is fixedly connected to a connecting seat, a second pin shaft is inserted into the surface of the connecting seat, and a first pin shaft is inserted into the surface of the supporting seats, and an inclined supporting component is rotatably connected between the two first pin shafts and the second pin shaft.

[0009] Furthermore, the supporting assembly includes a first connecting frame, a second connecting frame and an intermediate plate, the first connecting frame is rotatably connected to one side of the second pin shaft and the second pin shaft passes through the first connecting frame, the second connecting frame is rotatably connected to one side of the first pin shaft and the first pin shaft passes through the second connecting frame, the intermediate plate is arranged between the first connecting frame and the second connecting frame, two connecting plates are arranged on both sides of the intermediate plate, the four connecting plates are respectively located at both ends of the intermediate plate, and a plurality of fixing bolts are arranged between the two connecting plates at the same end, and the first connecting frame, the intermediate plate and the second connecting frame are connected and fixed by the fixing bolts.

[0010] Furthermore, an anti-slip component is arranged between the first connecting frame and the adjacent vertical plate, and the anti-slip component includes a first fixed seat and a second fixed seat, the first fixed seat is fixed to one side of the first connecting frame, a threaded rod is rotatably connected in the first fixed seat, and a positioning nut is connected to the circumferential thread of the threaded rod, the second fixed seat is fixed to one side of the vertical plate, a sleeve is rotatably connected in the second fixed seat, the sleeve is sleeved on the circumference of the threaded rod, and the positioning nut is located on one side of the sleeve.

[0011] Furthermore, a connecting mechanism is provided between the tops of two adjacent support seats, and the connecting mechanism includes two fixed columns, which are respectively fixed on the tops of the support seats. The two fixed columns are rotatably connected to threaded sleeves, and a screw is threadedly connected between the two threaded sleeves, and the threads at both ends of the screw are opposite.

[0012] Furthermore, a bolt head is fixedly connected to the middle portion of the screw rod.

[0013] Furthermore, a plurality of triangular blocks are fixedly connected to the bottom of the support seat and the bottom of the cross plate.

[0014] Furthermore, it also includes a pad, and one side of the support seat is fixed with the pad by bolts, and the side of the pad away from the support seat is arranged in an arc shape.

[0015] The present invention also provides a construction method of a foundation pit support structure, comprising the following steps:

[0016] S1: fix multiple support seats on multiple surfaces of the retaining wall panel respectively, install multiple support seats horizontally, and fix multiple brackets composed of multiple horizontal plates and vertical plates at the corners of the retaining wall panel at the same time. The support seats and the brackets are arranged at intervals. The length of the support assembly is adjusted according to the length of the retaining wall panel. When adjusting, select middle plates of different lengths, and connect the middle plate with the first connecting frame and the second connecting frame. When connecting, fit the connecting plate to one side of the middle plate, and use the fixing bolt to connect and fix the middle plate, the first connecting frame and the second connecting frame. After the connection and fixing, hoist the whole to one side of the support seat and connect them through the first pin shaft, and then insert the two first connecting frames into the connecting seat and connect them through the second pin shaft. The length of the support assembly can be adjusted according to the side length of the retaining wall panel. It is flexible to use and can adapt to different foundation pits.

[0017] S2: After the connection is completed, multiple hydraulic cylinders are started synchronously, and the hydraulic cylinders push the two adjacent support assemblies to rotate through the connecting seat. Since the support assemblies are set tilted, after the hydraulic cylinders are started, the support seats can be stably and firmly supported by the support assemblies, and the support strength can be adjusted;

[0018] S3: After the connection seat is displaced, the first connection frame drives the threaded rod to move. After the threaded rod is moved into place, the positioning nut is rotated so that the positioning nut contacts the sleeve, thereby achieving a supporting effect and improving the safety of use;

[0019] S4: Finally, the threaded sleeve and the screw rod are arranged between the two fixed columns. By rotating the screw rod, the threaded sleeve and the screw rod are stretched out to form a double-layer support effect between the support assembly to strengthen the support.

[0020] The beneficial effects of the present invention are:

[0021] 1. Double-layer support effect and flexible response to damage: The ingenious combination of support components and connecting mechanisms forms a unique double-layer support system. This design not only enhances the overall stability of the support structure, but also effectively responds to possible local deformation of the foundation pit. When the middle plate, the first connecting frame or the second connecting frame in the support component is damaged due to long-term wind and sun exposure or deformation of the foundation pit, the connecting mechanism can provide stable support to ensure that the support structure will not fail immediately, thereby providing valuable time for replacing or repairing damaged parts. Similarly, if the connecting mechanism is damaged, the support component can also play a temporary supporting role to ensure the safety of the foundation pit. The two complement each other and greatly improve the reliability and durability of the support structure.

[0022] 2. Stable support force and direction: One end of the hydraulic cylinder piston rod is fixedly connected to the connecting seat, ensuring the stable transmission of the support force. At the same time, the design of the anti-slip component can effectively prevent the connecting seat from tilting, ensuring that the force directions of the two support seats are consistent, further enhancing the stability of the support structure.

[0023] 3. High adaptability: The support structure proposed by the present invention can be flexibly adjusted according to foundation pits of different shapes and sizes. By replacing and adjusting the length of the support components, effective support for foundation pits of various shapes such as polygonal and circular shapes is achieved, which is significantly improved.

[0024] 4. Easy to install and maintain: The support structure and construction method proposed by the present invention simplify the installation and disassembly process, reduce the construction difficulty and cost. At the same time, the modular design of the support structure makes it easy to replace and maintain components when they are damaged or need to be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0026] Figure 1 It is a schematic diagram of the installation structure of a hexagonal foundation pit in a foundation pit support structure of the present invention;

[0027] Figure 2 It is a partial structural schematic diagram of a foundation pit supporting structure of the present invention;

[0028] Figure 3 For the present invention Figure 2 Another perspective structural diagram;

[0029] Figure 4 A schematic diagram of the installation structure of a support assembly of a foundation pit support structure of the present invention;

[0030] Figure 5 It is a schematic diagram of a four-side foundation pit installation structure of a foundation pit support structure of the present invention;

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of the circular foundation pit installation of a foundation pit support structure of the present invention.

[0032] In the figure: 1. retaining wall panel; 2. supporting seat; 3. supporting mechanism; 4. connecting mechanism; 5. horizontal plate; 6. vertical plate; 7. supporting assembly; 8. fixing column; 9. threaded sleeve; 10. screw rod; 11. bolt head; 12. triangular block; 13. hydraulic cylinder; 14. connecting seat; 15. first fixing seat; 16. second fixing seat; 17. sleeve; 18. threaded rod; 19. positioning nut; 20. first connecting frame; 21. second connecting frame; 22. first pin shaft; 23. middle plate; 24. connecting plate; 25. fixing bolt; 26. second pin shaft; 27. pad. DETAILED DESCRIPTION

[0033] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0034] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0035] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] Reference Figure 1-Figure 6 A foundation pit support structure shown includes: a polygonal retaining wall panel 1, multiple surfaces of the retaining wall panel 1 are fixedly connected with support seats 2, and a support mechanism 3 is installed between two adjacent support seats 2.

[0037] The supporting mechanism 3 includes a transverse plate 5, which is fixed at the corner of the retaining wall panel 1 and is located between the two supporting seats 2. The surface of the transverse plate 5 is fixedly connected to the vertical plate 6, and one side of the vertical plate 6 is rotatably connected to the hydraulic cylinder 13. One end of the piston rod of the hydraulic cylinder 13 is fixedly connected to the connecting seat 14, and the surface of the connecting seat 14 is plugged with a second pin shaft 26 that penetrates through it. The surfaces of the supporting seats 2 are all plugged with first pin shafts 22, and the two first pin shafts 22 and the second pin shafts 26 are rotatably connected with an inclined supporting assembly 7. The hydraulic cylinder 13 pushes two adjacent supporting assemblies 7 to rotate through the connecting seat 14. Since the supporting assembly 7 is tilted, after the hydraulic cylinder 13 is started, the supporting seat 2 can be stably and firmly supported by the supporting assembly 7.

[0038] In the present invention, the support assembly 7 includes a first connecting frame 20, a second connecting frame 21 and an intermediate plate 23. The first connecting frame 20 is rotatably connected to one side of the second pin shaft 26 and the second pin shaft 26 passes through the first connecting frame 20. The second connecting frame 21 is rotatably connected to one side of the first pin shaft 22 and the first pin shaft 22 passes through the second connecting frame 21. The intermediate plate 23 is arranged between the first connecting frame 20 and the second connecting frame 21. Two connecting plates 24 are arranged on both sides of the intermediate plate 23. The four connecting plates 24 are respectively located at the two ends of the intermediate plate 23. A plurality of fixing bolts 25 are arranged between the two connecting plates 24 at the same end. The first connecting frame 20, the intermediate plate 23 and the second connecting frame 21 are connected and fixed by the fixing bolts 25. The intermediate plate 23 can be freely replaced, so that the length of the support assembly 7 can be adjusted according to the side length of the retaining wall panel 1, and then the foundation pit is supported. It is flexible to use and can adapt to different foundation pits.

[0039] In particular, an anti-skid component is arranged between the first connecting frame 20 and the adjacent vertical plate 6, and the anti-skid component includes a first fixed seat 15 and a second fixed seat 16. The first fixed seat 15 is fixed on one side of the first connecting frame 20, and a threaded rod 18 is rotatably connected in the first fixed seat 15, and a positioning nut 19 is threadedly connected to the circumference of the threaded rod 18. The second fixed seat 16 is fixed on one side of the vertical plate 6, and a sleeve 17 is rotatably connected in the second fixed seat 16, and the sleeve 17 is sleeved on the circumference of the threaded rod 18. The positioning nut 19 is located on one side of the sleeve 17. The positioning nut 19 is rotated to make the positioning nut 19 conflict with the sleeve 17, thereby playing a supporting effect, improving the safety of use, and avoiding danger after the hydraulic cylinder 13 is depressurized.

[0040] It should be noted that a connecting mechanism 4 is also provided between the tops of two adjacent support seats 2, and the connecting mechanism 4 includes two fixed columns 8, and the two fixed columns 8 are respectively fixed on the tops of the support seats 2, and the circumferences of the two fixed columns 8 are rotatably connected with threaded sleeves 9, and a screw rod 10 is threadedly connected between the two threaded sleeves 9, and the threads at both ends of the screw rod 10 are opposite. The threaded sleeve 9 and the screw rod 10 are sleeved between the two fixed columns 8, and by rotating the screw rod 10, the threaded sleeve 9 and the screw rod 10 are stretched out, forming a double-layer support effect between the support assembly 7, thereby strengthening the support.

[0041] In the present invention, a bolt head 11 is fixedly connected to the middle of the screw rod 10 , and the bolt head 11 facilitates people to rotate the screw rod 10 .

[0042] In particular, a plurality of triangular blocks 12 are fixedly connected to the bottom of the support base 2 and the bottom of the cross plate 5 , and the triangular blocks 12 increase the stability of the support base 2 and the cross plate 5 .

[0043] Based on foundation pits of different shapes, the retaining wall panel 1 of the present invention is manufactured accordingly.

[0044] Embodiment 1

[0045] Reference Figure 1 , the retaining wall panel 1 is in an equilateral hexagon.

[0046] Embodiment 2

[0047] Reference Figure 5 , the retaining wall panel 1 is square.

[0048] Embodiment 3

[0049] Reference Figure 6 The retaining wall panel 1 is circular. In this embodiment, a pad 27 is also included. A pad 27 is fixed to one side of the support seat 2 by bolts. The side of the pad 27 away from the support seat 2 is in an arc shape. Adding the pad 27 can facilitate the use of the support seat 2 in conjunction with the underground continuous wall, thereby increasing the flexibility of use.

[0050] The present invention also provides a construction method of a foundation pit support structure, comprising the following steps:

[0051] S1: When in use, first fix multiple support seats 2 on multiple surfaces of the retaining wall panel 1 respectively, and multiple support seats 2 are installed horizontally. At the same time, multiple brackets composed of multiple horizontal plates 5 and vertical plates 6 are fixed at the corners of the retaining wall panel 1. The support seats 2 and the brackets are spaced apart. The length of the support assembly 7 is adjusted according to the length of the retaining wall panel 1. When adjusting, select the middle plates 23 of different lengths, and connect the middle plates 23 with the first connecting frame 20 and the second connecting frame 21. When connecting, fit the connecting plate 24 on one side of the middle plate 23, and use the fixing bolt 25 to connect and fix the middle plate 23, the first connecting frame 20 and the second connecting frame 21. After the connection and fixation, hoist the whole to one side of the support seat 2, and connect them through the first pin shaft 22, and then insert the two first connecting frames 20 into the connecting seat 14, and connect them through the second pin shaft 26. The length of the support assembly 7 can be adjusted according to the side length of the retaining wall panel 1. It is flexible to use and can adapt to different foundation pits.

[0052] S2: After the connection is completed, multiple hydraulic cylinders 13 are started synchronously, and the hydraulic cylinders 13 push two adjacent support assemblies 7 to rotate through the connecting seat 14. Since the support assembly 7 is tilted, after the hydraulic cylinders 13 are started, the support assembly 7 can stably and firmly support the support seat 2, and the support strength can be adjusted;

[0053] S3: After the connection seat 14 is displaced, the first connection frame 20 drives the threaded rod 18 to move. After the threaded rod 18 is moved into place, the positioning nut 19 is rotated so that the positioning nut 19 contacts the sleeve 17, thereby achieving a supporting effect and improving the safety of use;

[0054] S4: Finally, the threaded sleeve 9 and the screw rod 10 are sleeved between the two fixed columns 8. By rotating the screw rod 10, the threaded sleeve 9 and the screw rod 10 are stretched out to form a double-layer support effect with the support assembly 7 to strengthen the support.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A foundation pit support structure, comprising retaining wall panels (1) installed on multiple surfaces inside the foundation pit, It is characterized in that The shape of the foundation pit is circular or polygonal, multiple surfaces of the retaining wall panel (1) are fixedly connected to support seats (2), and a support mechanism (3) is installed between two adjacent support seats (2); The support mechanism (3) comprises a horizontal plate (5), which is fixed at a corner of the retaining wall plate (1) and is located between two support seats (2); a vertical plate (6) is fixedly connected to the surface of the horizontal plate (5); a hydraulic cylinder (13) is rotatably connected to one side of the vertical plate (6); one end of a piston rod of the hydraulic cylinder (13) is fixedly connected to a connecting seat (14); a second pin shaft (26) is inserted through the surface of the connecting seat (14); first pin shafts (22) are inserted into the surfaces of the support seats (2); and an inclined support assembly (7) is rotatably connected between the two first pin shafts (22) and the second pin shafts (26); The support assembly (7) comprises a first connecting frame (20), a second connecting frame (21) and an intermediate plate (23); the first connecting frame (20) is rotatably connected to one side of a second pin shaft (26) and the second pin shaft (26) passes through the first connecting frame (20); the second connecting frame (21) is rotatably connected to one side of a first pin shaft (22) and the first pin shaft (22) passes through the second connecting frame (21); the intermediate plate (23) is arranged between the first connecting frame (20) and the second connecting frame (21); two connecting plates (24) are arranged on both sides of the intermediate plate (23); the four connecting plates (24) are respectively located at two ends of the intermediate plate (23); a plurality of fixing bolts (25) are arranged between the two connecting plates (24) at the same end; the first connecting frame (20), the intermediate plate (23) and the second connecting frame (21) are connected and fixed by the fixing bolts (25); A connection mechanism (4) is further provided between the tops of two adjacent support seats (2), the connection mechanism (4) comprising two fixing columns (8), the two fixing columns (8) being respectively fixed to the tops of the support seats (2), the circumferences of the two fixing columns (8) being rotatably connected to threaded sleeves (9), a screw rod (10) being threadedly connected between the two threaded sleeves (9), the threads at both ends of the screw rod (10) being opposite, and a bolt head (11) being fixedly connected to the middle of the screw rod (10).

2. A foundation pit support structure according to claim 1, It is characterized in that An anti-skid component is provided between the first connecting frame (20) and the adjacent vertical plate (6), the anti-skid component comprising a first fixing seat (15) and a second fixing seat (16), the first fixing seat (15) being fixed to one side of the first connecting frame (20), a threaded rod (18) being rotatably connected inside the first fixing seat (15), a circumferential thread connection of the threaded rod (18) being connected to a positioning nut (19), the second fixing seat (16) being fixed to one side of the vertical plate (6), a sleeve (17) being rotatably connected inside the second fixing seat (16), the sleeve (17) being sleeved on the circumference of the threaded rod (18), and the positioning nut (19) being located on one side of the sleeve (17).

3. A foundation pit support structure according to claim 1, It is characterized in that The bottom of the support seat (2) and the bottom of the horizontal plate (5) are both fixedly connected with a plurality of triangular blocks (12).

4. A foundation pit support structure according to claim 1, It is characterized in that It also comprises a backing plate (27), one side of the support seat (2) being fixed with the backing plate (27) by means of bolts, and the side of the backing plate (27) away from the support seat (2) is arranged in an arc shape.

5. A construction method of a foundation pit support structure according to claim 2, It is characterized in that The following steps are involved: S1: When in use, firstly, a plurality of support seats (2) are fixed to a plurality of surfaces of the retaining wall panel (1), the plurality of support seats (2) are installed horizontally, and at the same time, a plurality of brackets consisting of a plurality of horizontal plates (5) and vertical plates (6) are fixed to the corners of the retaining wall panel (1), the support seats (2) and the brackets are arranged at intervals, and the length of the support assembly (7) is adjusted according to the length of the retaining wall panel (1). When adjusting, an intermediate plate (23) of different lengths is selected, and the intermediate plate (23) is connected to the first connecting frame (20) and the second connecting frame (21). When connected, , the connecting plate (24) is attached to one side of the middle plate (23), and the middle plate (23), the first connecting frame (20) and the second connecting frame (21) are connected and fixed by using the fixing bolt (25). After the connection and fixation, the whole is hoisted to one side of the support seat (2) and connected by the first pin shaft (22), and then the two first connecting frames (20) are inserted into the connecting seat (14) and connected by the second pin shaft (26). The length of the support assembly (7) can be adjusted according to the side length of the retaining wall panel (1), and it is flexible to use and adaptable to different foundation pits; S2: After the connection is completed, the plurality of hydraulic cylinders (13) are started synchronously, and the hydraulic cylinders (13) push two adjacent support assemblies (7) to rotate via the connection seat (14). Since the support assemblies (7) are arranged tilted, after the hydraulic cylinders (13) are started, the support seat (2) can be stably and firmly supported by the support assemblies (7), and the support strength can be adjusted; S3: After the connection seat (14) is displaced, the first connection frame (20) drives the threaded rod (18) to move. After the threaded rod (18) is moved into position, the positioning nut (19) is rotated so that the positioning nut (19) contacts the sleeve (17), thereby achieving a supporting effect and improving safety in use; S4: Finally, the threaded sleeve (9) and the screw rod (10) are sleeved between the two fixed columns (8), and the screw rod (10) is rotated so that the threaded sleeve (9) and the screw rod (10) are stretched out, thereby forming a double-layer support effect with the support assembly (7) to strengthen the support.

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