Foundation pit supporting structure for foundation pit excavation

Abstract

The invention discloses a foundation pit supporting structure for foundation pit excavation, and relates to the technical field of foundation pit supporting. Comprising steel sheet piles; the supporting structure is arranged on the back face of the steel sheet pile and used for supporting and fixing the steel sheet pile; and the connecting structure is arranged at the top end of the supporting structure and used for increasing the height of the steel sheet piles and connecting the steel sheet piles. According to the supporting structure, the U-shaped connecting base is tightly attached to the back face of the steel sheet pile, the telescopic plate can be flexibly mounted through the mounting hole in the fixing plate, the length of the telescopic plate can be adjusted according to actual requirements in cooperation with the fixing block and the tooth structure, and the supporting force on the steel sheet pile is increased; and a supporting system formed by the threaded rods, the threaded sleeves, the supporting rods and the like further improves the fixing effect on the steel sheet piles, the lateral soil pressure is effectively resisted, and the stability of the foundation pit is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit support, in particular to a foundation pit support structure for foundation pit excavation. Background Art

[0002] In the foundation pit excavation operation of construction projects, the foundation pit support structure plays a vital role. It can effectively ensure the stability of the soil around the foundation pit, prevent the occurrence of collapse accidents, and ensure the safety of construction personnel and equipment.

[0003] Although traditional foundation pit support structures, such as steel sheet pile support, can meet the foundation pit support needs to a certain extent, the traditional support structure has limited support and fixation effects on steel sheet piles. In complex geological conditions or deep foundation pit construction, it is difficult to withstand large lateral soil pressure, which can easily cause steel sheet piles to deform or even become unstable. The height of existing steel sheet pile support structures is usually relatively fixed and cannot be flexibly adjusted according to actual construction needs. When the foundation pit excavation depth changes, steel sheet piles of different specifications need to be replaced, which not only increases construction costs but also prolongs the construction period.

[0004] Therefore, a foundation pit supporting structure for foundation pit excavation is proposed. Summary of the Invention

[0005] The object of the present invention is to provide a foundation pit supporting structure for foundation pit excavation to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a foundation pit support structure for foundation pit excavation, comprising steel sheet piles;

[0007] A supporting structure is provided on the back of the steel sheet piles and is used to support and fix the steel sheet piles;

[0008] The connecting structure is arranged at the top of the supporting structure and is used to increase the height of and connect the steel sheet piles.

[0009] Preferably, the support structure includes a connecting seat, which is a U-shaped structure. A fixing plate is installed on one side of the top of the connecting seat, and mounting holes are provided on the top and one side outer wall of the fixing plate.

[0010] Preferably, positioning holes are symmetrically provided at the top of the connecting seat, positioning pins are provided in the inner threads of the positioning holes, a telescopic plate is movably provided in the mounting hole, and one side of the telescopic plate is provided with an integrally formed tooth.

[0011] Preferably, a fixing bracket is provided parallel to the top of the connecting seat, the fixing bracket is an L-shaped structure, a threaded rod is provided between the inner side of the top of the fixing bracket and the top of the connecting seat, and a threaded sleeve is provided on the outer wall of the threaded rod.

[0012] Preferably, a support rod is hinged on the outer side of the threaded sleeve, a connector is installed at the end of the support rod, and a fixing block is hinged on the other end of the connector, and the fixing block is adapted to the teeth.

[0013] Preferably, a hinge seat is installed on one side of the fixing frame, the hinge seat is located on both sides of the mounting hole, and a support block is hinged between the inner walls of the hinge seat, and the support block is adapted to the teeth.

[0014] Preferably, the connecting structure includes symmetrically arranged support frames, connecting rods are arranged between the support frames, and the support frames are connected to the top of the telescopic plate, a bearing seat is installed on one side of the support frame, a fixing rod is provided on the inner wall of the bearing seat, a pawl is provided on the outer wall of the fixing rod, and a pull rod is installed on one side of the pawl.

[0015] Preferably, a fixed seat is installed at the top of the support frame, a rotating shaft is provided at the center of the inner wall of the fixed seat, a ratchet is installed on the outer wall of the head end of the rotating shaft, the ratchet is adapted to the pawl, a baffle is installed on one side of the support frame, the baffle is located below the pull rod, a locking plate is installed on the center outer wall of the fixed rod, and a hanging plate is installed at the center position of one side of the connecting rod.

[0016] Preferably, a mounting bracket is installed on the outer wall of the end of the rotating shaft, and a mounting plate is provided on the top of the mounting bracket.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The foundation pit support structure used for foundation pit excavation is equipped with a supporting structure that fits tightly with the back of the steel sheet pile through a U-shaped connecting seat. The telescopic plate can be flexibly installed using the mounting holes on the fixed plate. In combination with the fixed block and the tooth structure, the length of the telescopic plate can be adjusted according to actual needs to increase the supporting force for the steel sheet pile. At the same time, the support system composed of components such as threaded rods, threaded sleeves and support rods further enhances the fixing effect of the steel sheet pile, effectively resists lateral soil pressure, and ensures the stability of the foundation pit.

[0019] At the same time, the support frame, ratchet and pawl in the connecting structure cooperate to realize the convenient heightening and connection of the steel sheet piles. When the height of the steel sheet piles needs to be increased, the pawl is engaged with the ratchet by operating the pull rod, driving the rotating shaft to rotate, and then adjusting the position of the mounting frame and the mounting plate to achieve precise adjustment of the height of the steel sheet piles. It does not need to replace the steel sheet piles to adapt to the excavation needs of foundation pits of different depths, reducing construction costs and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall axial side schematic diagram of the present invention;

[0021] Figure 2 This is a schematic axial view of the support structure of the present invention;

[0022] Figure 3 Schematic diagram of the support structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the back structure of the support structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the axial side structure of the connection structure of the present invention;

[0025] Figure 6 It is a schematic side view of the connection structure of the present invention;

[0026] Figure 7 For the present invention Figure 6 A is an enlarged schematic diagram.

[0027] In the figure: 1. Steel sheet pile; 2. Support structure; 20. Connecting seat; 21. Fixing plate; 22. Positioning pin; 23. Mounting hole; 24. Fixing frame; 25. Support rod; 26. Articulated seat; 27. Support block; 28. Telescopic plate; 29. Teeth; 291. Fixing block; 292. Connecting head; 293. Threaded sleeve; 3. Connecting structure; 30. Support frame; 31. Connecting rod; 32. Bearing seat; 33. Fixing rod; 34. Locking plate; 35. Fixing seat; 36. Hanging plate; 37. Ratchet; 38. Pawl; 39. Pull rod; 391. Stop rod; 392. Mounting frame; 393. Mounting plate. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "above," or "below" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0034] like Figures 1 to 7 As shown, the present invention provides a technical solution: a foundation pit support structure for foundation pit excavation, comprising a steel sheet pile 1;

[0035] A support structure 2 is provided on the back of the steel sheet pile 1 and is used to support and fix the steel sheet pile 1;

[0036] The connecting structure 3 is provided at the top of the supporting structure 2 and is used to increase the height of the steel sheet piles 1 and connect them.

[0037] The support structure 2 includes a connecting seat 20, which is a U-shaped structure. A fixing plate 21 is installed on one side of the top of the connecting seat 20. The top and one side outer wall of the fixing plate 21 are provided with mounting holes 23. The top of the connecting seat 20 is symmetrically provided with positioning holes, and the inner thread of the positioning hole is provided with a positioning nail 22. A telescopic plate 28 is movably provided in the mounting hole 23. One side of the telescopic plate 28 is provided with an integrally formed tooth 29. A fixing frame 24 is provided in parallel with the top of the connecting seat 20. The fixing frame 24 is an L-shaped structure. The inner side of the top of the fixing frame 24 A threaded rod is provided between the top of the connecting seat 20, and a threaded sleeve 293 is provided on the outer wall of the threaded rod. A support rod 25 is hinged on the outer side of the threaded sleeve 293. A connecting head 292 is installed at the end of the support rod 25. The other end of the connecting head 292 is hinged to a fixed block 291, and the fixed block 291 is adapted to the teeth 29. A hinge seat 26 is installed on one side of the fixing plate 21. The hinge seat 26 is located on both sides of the mounting hole 23. A support block 27 is hinged between the inner walls of the hinge seat 26, and the support block 27 is adapted to the teeth 29. Among them, the steel sheet pile 1 is connected to the telescopic plate 28 on the supporting structure 2 by bolts, and then the connecting seat 20 is fixedly connected to the ground of the foundation pit by the positioning nail 22. The top of the threaded rod passes through the top of the fixing frame 24, and the top outer wall of the threaded rod is movably provided with a rotating handle. The rotating handle can drive the rotation of the threaded rod, and the threaded rod and the connecting seat 20 are connected by a plane bearing. The support rod 25 can be telescopic and can be extended and retracted according to the height of the telescopic plate 28, thereby supporting the telescopic plate 28. A connecting head 292 is fixedly connected to the telescopic end of the support rod 25, and the connecting head 292 is connected to the fixing block 291 by bolts. Since there is a gap between the teeth 29, the fixing block 291 can be inserted into the gap between the teeth 29, thereby fixing the telescopic plate 28. At the same time, a hinged seat 26 is also provided on the outer side of the fixing frame 24, and the inner wall of the hinged seat 26 is connected to the support block 27 by bolts. The support block 27 can also support the telescopic plate 28.

[0038] like Figures 1 to 7As shown, the connecting structure 3 includes symmetrically arranged support frames 30, and connecting rods 31 are arranged between the support frames 30, and the support frames 30 are connected to the top of the telescopic plate 28, and a bearing seat 32 is installed on one side of the support frame 30, and a fixing rod 33 is provided on the inner wall of the bearing seat 32, and a pawl 38 is provided on the outer wall of the fixing rod 33, and a pull rod 39 is installed on one side of the pawl 38, and a fixing seat 35 is installed on the top of the support frame 30, and a rotating shaft is provided at the center of the inner wall of the fixing seat 35, and a ratchet 37 is installed on the outer wall of the head end of the rotating shaft, and the ratchet 37 is adapted to the pawl 38, and a blocking rod 391 is installed on one side of the support frame 30, and the blocking rod 391 is located below the pull rod 39, and a locking plate 34 is installed on the center outer wall of the fixing rod 33, and a hanging plate 36 is installed at the center position of one side of the connecting rod 31, and a mounting frame 392 is installed on the outer wall of the end of the rotating shaft, and a mounting plate 393 is provided on the top of the mounting frame 392. The support frame 30 is connected to the top of the telescopic plate 28 by bolts, and a connecting rod 31 is fixedly connected between the support frames 30. The connecting rod 31 can play a role in the stability of the support frame 30. The outer side of the support frame 30 is connected to a bearing seat 32 by bolts. A plane bearing is installed in the bearing seat 32, and the connecting rod 31 is located on the inner wall of the plane bearing. A pawl 38 is fixedly connected to the outer wall of the connecting rod 31 located on the outer side of the plane bearing. At the same time, a fixing seat 35 is also installed on the top of the support frame 30 by bolts. The inner wall of the fixing seat 35 is also provided with a plane bearing. The rotating shaft is located at On the central inner wall of the plane bearing, a ratchet 37 is connected to the outer wall of one end of the rotating shaft, and a mounting bracket 392 is connected to the outer wall of the other end. In order to facilitate the loosening and fixing of the pawl 38 and the ratchet 37, a pull rod 39 is fixedly connected to one end of the pawl 38, and the pull rod 39 can be driven downward to realize the rotation of the ratchet 37. A locking plate 34 is fixedly connected to the outer wall of the fixing rod 33, and a hanging plate 36 is fixedly connected to the outer side of the support frame 30. The hanging plate 36 and the locking plate 34 are connected by a movable hook, thereby realizing the fixation of the position of the mounting bracket 392.

[0039] The working process of the present invention is as follows: first, the steel sheet pile 1 is driven into the edge of the foundation pit that needs to be protected, and then the connecting seat 20 is fixed to the ground by the positioning nail 22, and then the telescopic plate 28 in the fixing frame 24 is pulled out, and then the threaded rod is driven to rotate by the external rotating handle, and the rotating threaded rod will drive the threaded sleeve 293 to rise. In order to prevent the threaded sleeve 293 from rotating with the threaded rod, first the connecting head 292 connected to the support rod 25 is clamped between the teeth 29 to support the telescopic plate 28, and then the telescopic plate 28 is supported by the support block 27 hinged on the hinged seat 26. When it is necessary to support a deeper foundation pit, fix the support frame 30 and the telescopic plate 28 with bolts, and then press down the pull rod 39 to separate the pawl 38 and the ratchet 37. Then, manually press down the mounting plate 393 installed on the mounting frame 392. After pressing it to the appropriate position, release the pull rod 39 to engage the pawl 38 with the ratchet 37. At the same time, in order to prevent the fixing rod 33 from rotating at any time, lock the hanging plate 36 and the locking plate 34 through a hook, and then connect the steel sheet pile 1 to the mounting plate 393 with bolts, so as to realize the installation of the steel sheet pile 1.

[0040] To sum up: the foundation pit support structure used for foundation pit excavation includes steel sheet piles 1, a supporting structure 2, which is arranged on the back of the steel sheet piles 1 and is used to support and fix the steel sheet piles 1, and a connecting structure 3, which is arranged at the top of the supporting structure 2 and is used to increase the height and connect the steel sheet piles 1.

[0041] The support structure 2 is set up to fit tightly with the back of the steel sheet pile 1 through the U-shaped connecting seat 20. The telescopic plate 28 can be flexibly installed using the mounting hole 23 on the fixing frame 24. In conjunction with the fixing block 291 and the tooth 29 structure, the length of the telescopic plate 28 can be adjusted according to actual needs to increase the supporting force for the steel sheet pile 1. At the same time, the support system composed of components such as the threaded rod, the threaded sleeve 293 and the support rod 25 further enhances the fixing effect of the steel sheet pile 1, effectively resists lateral soil pressure, and ensures the stability of the foundation pit.

[0042] At the same time, the support frame 30, ratchet 37 and pawl 38 in the connecting structure 3 cooperate to realize convenient heightening and connection of the steel sheet pile 1. When the height of the steel sheet pile 1 needs to be increased, the pawl 38 is engaged with the ratchet 37 by operating the pull rod 39, driving the rotating shaft to rotate, and then adjusting the position of the mounting frame 392 and the mounting plate 393 to achieve precise adjustment of the height of the steel sheet pile 1. It is possible to adapt to the excavation requirements of foundation pits of different depths without replacing the steel sheet pile 1, thereby reducing construction costs and improving construction efficiency.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is limited by the accompanying embodiments and their equivalents.

Claims

1. A foundation pit support structure for foundation pit excavation, characterized in that: including steel sheet piles (1); A supporting structure (2) is provided on the back of the steel sheet pile (1) and is used to support and fix the steel sheet pile (1); The connecting structure (3) is arranged at the top of the supporting structure (2) and is used to increase the height of and connect the steel sheet piles (1).

2. A foundation pit supporting structure for foundation pit excavation according to claim 1, characterized in that: The support structure (2) includes a connecting seat (20), which is a U-shaped structure. A fixing plate (21) is installed on one side of the top of the connecting seat (20), and mounting holes (23) are provided on the top and one side outer wall of the fixing plate (21).

3. The foundation pit support structure for foundation pit excavation according to claim 2, characterized in that: The top of the connecting seat (20) is symmetrically provided with a positioning hole, the inner thread of the positioning hole is provided with a positioning pin (22), a telescopic plate (28) is movably provided in the mounting hole (23), and one side of the telescopic plate (28) is provided with an integrally formed tooth (29).

4. The foundation pit support structure for foundation pit excavation according to claim 2, characterized in that: A fixing frame (24) is provided parallel to the top of the connecting seat (20), and the fixing frame (24) is an L-shaped structure. A threaded rod is provided between the inner side of the top of the fixing frame (24) and the top of the connecting seat (20), and a threaded sleeve (293) is provided on the outer wall of the threaded rod.

5. The foundation pit supporting structure for foundation pit excavation according to claim 4, characterized in that: The outer side of the threaded sleeve (293) is hinged with a support rod (25), the end of the support rod (25) is installed with a connector (292), the other end of the connector (292) is hinged with a fixing block (291), and the fixing block (291) is adapted to the teeth (29).

6. The foundation pit support structure for foundation pit excavation according to claim 4, characterized in that: A hinge seat (26) is installed on one side of the fixing plate (21), and the hinge seat (26) is located on both sides of the mounting hole (23). A support block (27) is hinged between the inner walls of the hinge seat (26), and the support block (27) is adapted to the teeth (29).

7. The foundation pit supporting structure for foundation pit excavation according to claim 1, characterized in that: The connecting structure (3) includes symmetrically arranged support frames (30), a connecting rod (31) is arranged between the support frames (30), and the support frames (30) are connected to the top of the telescopic plate (28), a bearing seat (32) is installed on one side of the support frame (30), a fixing rod (33) is provided on the inner wall of the bearing seat (32), a pawl (38) is provided on the outer wall of the fixing rod (33), and a pull rod (39) is installed on one side of the pawl (38).

8. The foundation pit supporting structure for foundation pit excavation according to claim 7, characterized in that: A fixing seat (35) is installed at the top of the support frame (30), a rotating shaft is provided at the center of the inner wall of the fixing seat (35), a ratchet (37) is installed on the outer wall of the first end of the rotating shaft, and the ratchet (37) is adapted to the pawl (38), a blocking rod (391) is installed on one side of the support frame (30), and the blocking rod (391) is located below the pull rod (39), a locking plate (34) is installed on the center outer wall of the fixing rod (33), and a hanging plate (36) is installed at the center position of one side of the connecting rod (31).

9. The foundation pit supporting structure for foundation pit excavation according to claim 8, characterized in that: A mounting frame (392) is mounted on the outer wall of the end of the rotating shaft, and a mounting plate (393) is provided on the top of the mounting frame (392).

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