Deep foundation pit supporting structure

Abstract

The utility model relates to a deep foundation pit supporting structure which comprises a plurality of supporting plates, the supporting plates are horizontally distributed along the inner wall of a foundation pit, the supporting plates are U-shaped steel plates, the adjacent supporting plates are connected in an inserted mode, the upper ends of the supporting plates are fixedly arranged on the foundation pit through fixing devices, and the lower ends of the supporting plates are supported through supporting devices. The supporting device comprises a supporting seat and a supporting rod, the supporting seat is arranged on the bottom wall of the foundation pit and close to the supporting plate, one end of the supporting rod is hinged to the supporting seat, the other end of the supporting rod abuts against the supporting plate, and a limiting assembly for limiting the rotating range of the supporting rod is arranged on the supporting seat. The upper ends of the single supporting plates are supported through the fixing devices, then the lower ends of the single supporting plates are supported through the supporting bases and the supporting rods, and then the possibility that follow-up construction is affected due to the fact that the inclined supporting rods and the supporting bases located in the center of the foundation pit occupy large space is reduced.

Description

Technical Field

[0001] The present application relates to the field of deep foundation pit support technology, and in particular to a deep foundation pit support structure. Background Art

[0002] A deep foundation pit refers to an engineering project with an excavation depth exceeding 5 meters (including 5 meters), or a project with a depth of less than 5 meters but with particularly complex geological conditions, surrounding environment and underground pipelines. The foundation pit project is an underground space excavated from the ground downwards. Vertical retaining structures are generally set up around the deep foundation pit. The retaining structure is generally a slab (pile) wall structure with a certain insertion depth under the base of the excavation surface.

[0003] The Chinese utility model patent with the authorization announcement number CN209907401U discloses a foundation pit support structure, including U-shaped steel plates arranged around the foundation pit, connectors for connecting adjacent U-shaped steel plates, reinforcing plates fixed on the U-shaped steel plates, and a protective mechanism arranged on the reinforcing plates to prevent the U-shaped steel plates from sinking, wherein the protective mechanism includes a slide groove provided on the reinforcing plates, a slide plate slidably matched with the slide groove, a baffle plate rotatably connected to the slide plate, and a fixing assembly for fixing the slide plate, wherein the slide groove is provided along the height direction of the reinforcing plates; the fixing assembly includes a card plate rotatably connected to the slide plate, a stud fixed on the reinforcing plates, and a nut threadedly connected to the stud, wherein the card plate is provided with an arc hole, and the stud is arranged at intervals in the height direction of the reinforcing plates. The utility model has the effect that the U-shaped steel plates will not sink, and no gaps will be generated between adjacent U-shaped steel plates.

[0004] There are several diagonal support rods arranged in the foundation pit, and one end of the diagonal support rod is abutted against the U-shaped steel plate, and the other end of the diagonal support rod is abutted against the support seat at the bottom center of the foundation pit, occupying more space of the foundation pit. Therefore, when the foundation pit is constructed, the diagonal support rod and the support seat in the center will affect the normal construction of the foundation pit. Utility Model Content

[0005] In order to reduce the possibility that diagonal braces and support seats may affect the normal construction of the foundation pit, the present application provides a deep foundation pit support structure.

[0006] The deep foundation pit support structure provided in this application adopts the following technical solution:

[0007] A deep foundation pit support structure includes a support plate, wherein a plurality of support plates are horizontally distributed along the inner wall of the foundation pit, the support plate is a U-shaped steel plate, adjacent support plates are plugged into each other, the upper end of the support plate is fixed to the foundation pit by a fixing device, and the lower end is supported by a supporting device, the supporting device includes a support seat and a support rod, the support seat is arranged on the bottom wall of the foundation pit and close to the support plate, one end of the support rod is hinged to the support seat, and the other end is abutted against the support plate, and a limit assembly for limiting the rotation range of the support rod is arranged on the support seat.

[0008] By adopting the above technical solution, when supporting the lower end of the support plate, the support rod is rotated on the support seat, and when the support rod abuts the limit assembly, the upper end of the support rod abuts the lower end of the support plate, and then the upper end of the support plate is supported by the fixing device. Since the upper and lower ends of the support rod are supported by a smaller structure, the possibility of affecting the normal construction of the foundation pit due to the large space occupied by the diagonal support rod and the support seat when supporting the support plate by the diagonal support rod and the support seat located in the center is reduced.

[0009] Optionally, the limiting assembly includes a limiting frame and a reset member, the limiting frame is arranged on the support seat, the hinge point between the support rod and the support seat is located in the limiting frame, and the reset member is arranged in the limiting frame and assists the support rod in resetting.

[0010] By adopting the above technical solution, when the limit assembly limits the support rod, the support rod abuts against the limit frame, and the limit frame limits the rotation position of the support rod. When the support rod rotates to the highest position and still does not contact the limit frame, the reset member abuts against the support rod; when the support rod no longer supports the support rod, the reset member drives the support rod to reset, thereby reducing the possibility that the support rod is in an inclined state when not in use.

[0011] Optionally, the limit frame includes a limit portion and two support portions, the two support portions are distributed on both sides of the hinge point between the support rod and the support seat along the distribution direction of the multiple support plates, the limit portion is arranged on the two support portions and is located above the hinge point between the support rod and the support seat, a limit slot is provided on the limit portion, and the reset member is arranged on the two support seats.

[0012] By adopting the above technical solution, the support rod abuts against the limiting groove opened on the limiting part, and the limiting groove reduces the possibility of the support rod shaking during support. The reset member abuts against the support rod below the limiting part. On the one hand, it allows the support rod to be better supported on the support plate; on the other hand, it facilitates the reset of the support rod.

[0013] Optionally, the reset member includes a mounting seat, an abutment block and an elastic member, the mounting seat is arranged on two support parts, a sliding groove is opened on the inner wall on the opposite side of the two support parts, the abutment block is slidably arranged in the sliding groove, and one end of the elastic member is arranged on the abutment block, and the other end is arranged on the mounting seat.

[0014] By adopting the above technical solution, when the support rod rotates upward and is supported on the support plate, the support rod abuts against the abutment block. As the support rod abuts, the abutment block slides in the sliding groove and compresses the elastic part, so that the elastic part is gradually in a compressed state, thereby driving the abutment block to abut the support rod.

[0015] Optionally, a clearance groove is provided on the abutment block, and the support rod is located in the clearance groove when supporting the support plate.

[0016] By adopting the above technical solution, the support rod contacts the inner wall of the clearance groove during the upward rotation process, thereby reducing the possibility of shaking of the support rod when rotating upward and reducing the possibility of misalignment of the support rod with the limit groove when the support rod rotates to the uppermost position.

[0017] Optionally, the fixing device includes a fixing seat and a fixing bolt, and the fixing seat and the support plate are both provided with through holes, and the fixing bolt passes through the through holes and is threadedly connected to the foundation pit.

[0018] By adopting the above technical solution, the fixing bolts pass through the through holes on the fixing seat and the support plate in sequence, thereby fixing the support plate on the inner wall of the foundation pit, thereby reducing the possibility of the upper end of the support plate tilting.

[0019] Optionally, a first sealing gasket is provided on one end of the fixing seat facing the support plate, the sealing gasket abuts against the support plate, a second sealing gasket is provided on the surface of one end of the fixing seat facing away from the support plate, and the end of the fixing bolt abuts against the second sealing gasket.

[0020] By adopting the above technical solution, the first sealing gasket abuts against the support plate, and the head of the fixing bolt abuts against the second sealing gasket, thereby reducing the possibility of moisture in the soil outside the foundation pit penetrating into the support plate through the through hole.

[0021] Optionally, a crossbeam is provided in the middle portion of the support plate, and a positioning assembly is provided between the crossbeam and the support plate, and the positioning assembly fixes the crossbeam on the support plate.

[0022] By adopting the above technical solution, the middle part of the support plate is fixed by the crossbeam and the positioning assembly, thereby reducing the possibility that the middle part of the support plate protrudes toward the middle position of the foundation pit.

[0023] Optionally, a plug-in block is provided on one side of the beam facing the support plate, the plug-in block is in contact with the inner wall of the support plate on one side facing the support plate, and the positioning assembly positions the plug-in block and the beam.

[0024] By adopting the above technical solution, the plug-in block is inserted into the groove of the support plate, so that the side of the beam facing the support plate is in contact with the support plate, reducing the possibility of the support plate protruding toward the center of the foundation pit at the contact point of the beam.

[0025] Optionally, a sealing member for preventing water seepage is provided between adjacent support plates.

[0026] By adopting the above technical solution, the space between two adjacent support plates is sealed by a seal, thereby reducing the possibility of moisture in the foundation pit soil penetrating into the interior of the support plates through the gap between the two adjacent support plates.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The upper end of the support plate is fixed by a fixing device, and the lower end of the support plate is supported by a support rod and a support seat. Both ends of the support plate are supported by a smaller structure to reduce the possibility that the diagonal support rod or the support seat placed in the center of the foundation pit will affect the subsequent construction of the foundation pit due to occupying more space;

[0029] 2. A limiting groove is provided on the limiting part. When the support rod is supported on the support plate, the limiting rod is located in the limiting groove, thereby reducing the possibility that the support rod shakes on the limiting part and affects the supporting effect;

[0030] 3. The middle part of the support plate is supported by a crossbeam and then fixed by a positioning assembly to reduce the possibility of the middle position of the support plate protruding toward the center of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0032] Figure 2 yes Figure 1 The enlarged view of point A in the middle is used to show the installation diagram of the seal.

[0033] Figure 3 It is a schematic diagram of the installation of the support device and the beam in the embodiment of the present application.

[0034] Figure 4 It is an exploded schematic diagram of the fixing device in the embodiment of the present application.

[0035] Figure 5 It is a schematic diagram of the installation of the limit assembly in the embodiment of the present application.

[0036] Explanation of the accompanying drawings: 1. foundation pit; 2. support plate; 21. sealing member; 22. through hole; 3. fixing device; 31. fixing seat; 32. fixing bolt; 33. first sealing gasket; 34. second sealing gasket; 4. supporting device; 41. supporting seat; 42. supporting rod; 5. crossbeam; 51. positioning assembly; 52. plug-in block; 6. limiting assembly; 61. limiting frame; 611. limiting portion; 612. supporting portion; 613. sliding groove; 614. limiting groove; 62. resetting member; 621. mounting seat; 622. elastic member; 623. abutment block; 624. clearance groove. DETAILED DESCRIPTION

[0037] The following is combined with Figures 1 to 5 This application is described in further detail.

[0038] The present application embodiment discloses a deep foundation pit support structure. Figure 1 and Figure 2 , including support plates 2, multiple support plates 2 are horizontally distributed along the inner wall of the foundation pit 1, adjacent support plates 2 are plugged into each other, and the plug-in parts of adjacent support plates 2 are sealed and installed through sealing members 21.

[0039] The seal 21 includes a sealing gasket block, which is made of elastically deformable rubber, and the shape of the sealing gasket block is consistent with the shape of the plug-in part of the support plate 2. The sealing gasket block is installed on one of the support plates 2, and the other support plate 2 is plugged into the sealing gasket block. Through the installation of the sealing gasket block, the possibility of moisture on the periphery of the foundation pit 1 penetrating into the interior of the support plate 2 through the plug-in part of the support plate 2 is reduced.

[0040] The upper end of the support plate 2 is mounted on the inner wall of the foundation pit 1 through a fixing device 3 , and the lower end is supported and mounted through a supporting device 4 .

[0041] Reference Figure 3 and Figure 4 The fixing device 3 includes a fixing seat 31 and a fixing bolt 32. A through hole 22 is opened on the fixing seat 31 and the support plate 2. A first sealing gasket 33 is installed on one side of the fixing seat 31 facing the support plate 2, and a second sealing gasket 34 is concealedly installed on the side of the fixing seat 31 facing away from the support seat 41. The fixing bolt 32 passes through the through holes 22 on the fixing seat 31 and the support plate 2 and is threadedly connected to the inner wall of the foundation pit 1. The first sealing gasket 33 on the fixing seat 31 abuts on the support plate 2, and the head of the fixing bolt 32 abuts on the second sealing gasket 34. The upper end of the support plate 2 is fixed by the fixing bolt 32, reducing the possibility of the support plate 2 detaching from the foundation pit 1. At the same time, the space occupied by the fixing seat 31 and the fixing bolt 32 is small, reducing the possibility of occupying a large space and being inconvenient for subsequent construction. By installing the first sealing gasket 33 and the second sealing gasket 34, the possibility of water outside the foundation pit 1 extending into the inner side of the support plate 2 from the through hole 22 is reduced.

[0042] A crossbeam 5 is installed in the middle position of the support plate 2, and a plug-in block 52 is installed on the surface of the crossbeam 5 facing the support plate 2. The plug-in block 52 is fitted with the inner wall of the support plate 2 on the side facing the support plate 2. The crossbeam 5 fixes the support plate 2 to the inner wall of the foundation pit 1 through a positioning component 51. The positioning component 51 is a positioning bolt. The positioning bolt passes through the crossbeam 5, the plug-in block 52 and the support plate 2 in sequence and is threadedly connected to the inner wall of the foundation pit 1, thereby supporting the middle part of the support plate 2 more stably on the inner wall of the foundation pit 1, reducing the possibility of the middle part of the support plate 2 protruding toward the center of the foundation pit 1.

[0043] The supporting device 4 includes a supporting seat 41 and a supporting rod 42. The supporting seat 41 is installed on the inner bottom wall of the foundation pit 1. One end of the supporting rod 42 abuts against the supporting plate 2, and the other end is hinged on the supporting seat 41. A limiting assembly 6 for limiting the rotation range of the supporting rod 42 is installed on the supporting seat 41. The supporting rod 42 abuts against the bottom end of the supporting plate 2, and the supporting seat 41 is close to the supporting plate 2 on the inner bottom wall of the foundation pit 1, thereby reducing the possibility that the diagonal support rod occupies a large space and affects subsequent construction.

[0044] Reference Figure 3 and Figure 5 The limiting assembly 6 includes a limiting frame 61 and a reset member 62. The limiting frame 61 includes a limiting portion 611 and two supporting portions 612. The two supporting portions 612 are installed on the support seat 41. The two supporting portions 612 are distributed on both sides of the hinge point between the support rod 42 and the support seat 41 along the distribution direction of the multiple support plates 2. The limiting portion 611 is installed between the two supporting portions 612. A limiting groove 614 is provided on the side of the limiting portion 611 facing the support rod 42. The inner wall of the limiting groove 614 is the same as the shape of the support rod 42. When the support rod 42 rotates to abut against the limiting portion 611, it is supported on the lower end of the support plate 2, thereby reducing the possibility that the lower end of the support plate 2 will be lifted and affect subsequent construction.

[0045] The reset member 62 includes a mounting seat 621, an abutment block 623 and an elastic member 622. The mounting seat 621 is mounted on the two support portions 612. A sliding groove 613 is provided on the surface of the opposite side of the two support portions 612. The two ends of the abutment block 623 correspond to the two sliding grooves 613 one by one and the end of the abutment block 623 is slidably mounted in the sliding groove 613. The elastic member 622 includes a reset spring. One end of the reset spring is mounted on the mounting seat 621 and the other end is mounted on the abutment block 623. When the support rod 42 supports the support plate 2, the support rod 42 slides upward on the support plate 2 toward one end of the support plate 2. The support rod 42 abuts against the abutment block 623 and compresses the reset spring. After the reset spring is compressed, it is convenient for the support rod 42 to reset when it is not supported.

[0046] A clearance groove 624 is formed on the abutment block 623 , and the support rod 42 is located in the clearance groove 624 when supporting the support plate 2 , thereby reducing the possibility of the support rod 42 shaking left and right.

[0047] The implementation principle of a deep foundation pit support structure in the embodiment of the present application is:

[0048] When the support plate 2 is installed on the inner wall of the deep foundation pit 1, when the lower end of the support plate 2 is supported, the support rod 42 is pulled up, one end of the support rod 42 is rotated on the support seat 41, and the other end is abutted on the support plate 2, and the support rod 42 abuts on the limiting portion 611 and the abutting block 623, thereby supporting the lower end of the support rod 42, and the support rod 42 is supported on the support plate 2, thereby supporting the lower end of the support plate 2.

[0049] The upper end of the support plate 2 is threadedly connected to the inner wall of the foundation pit 1 by passing the fixing bolts 32 through the fixing seat 31 and the through holes 22 on the support plate 2, thereby fixing the upper end of the support plate 2 on the foundation pit 1, reducing the possibility of the upper end of the support plate 2 detaching from the inner wall of the foundation pit 1.

[0050] The head of the fixing bolt 32 abuts the second sealing gasket 34 , and the fixing seat 31 abuts the first sealing gasket 33 on the support plate 2 , thereby reducing the possibility of moisture in the soil outside the foundation pit 1 penetrating into the support plate 2 through the through holes 22 on the support plate 2 and the fixing seat 31 .

[0051] The middle part of the support plate 2 is abutted by the cross beam 5 and the plug-in block 52 and fixed by positioning bolts, thereby reducing the possibility that the middle part of the support plate 2 protrudes into the inside of the foundation pit 1 and thus affects the supporting effect of the support plate 2.

[0052] After the support plate 2 is disassembled, the mounting seats 621 on the two support parts 612 and the return spring drive the abutment block 623 to push the support rod 42, so that the upper end of the support rod 42 rotates downward, which is convenient for the retraction and extension of the support rod 42.

[0053] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A deep foundation pit support structure, comprising a support plate (2), wherein a plurality of support plates (2) are horizontally distributed along the inner wall of a foundation pit (1), wherein the support plates (2) are U-shaped steel plates, and adjacent support plates (2) are plugged into each other, and characterized in that: The upper end of the support plate (2) is fixedly arranged on the foundation pit (1) by a fixing device (3), and the lower end is supported by a supporting device (4); the supporting device (4) comprises a supporting seat (41) and a supporting rod (42); the supporting seat (41) is arranged on the bottom wall of the foundation pit (1) and close to the support plate (2); one end of the support rod (42) is hingedly arranged on the supporting seat (41) and the other end is in contact with the support plate (2); a limiting component (6) for limiting the rotation range of the support rod (42) is arranged on the supporting seat (41).

2. A deep foundation pit support structure according to claim 1, characterized in that: The limiting assembly (6) comprises a limiting frame (61) and a reset member (62); the limiting frame (61) is arranged on the support seat (41); the hinge point between the support rod (42) and the support seat (41) is located in the limiting frame (61); the reset member (62) is arranged in the limiting frame (61) and assists the support rod (42) in resetting.

3. A deep foundation pit support structure according to claim 2, characterized in that: The limiting frame (61) comprises a limiting portion (611) and two supporting portions (612); the two supporting portions (612) are distributed on both sides of a hinge point between a supporting rod (42) and a supporting seat (41) along a distribution direction of the plurality of supporting plates (2); the limiting portion (611) is arranged on the two supporting portions (612) and is located above a hinge point between the supporting rod (42) and the supporting seat (41); a limiting groove (614) is provided on the limiting portion (611); and the reset member (62) is arranged on the two supporting seats (41).

4. A deep foundation pit support structure according to claim 3, characterized in that: The reset member (62) comprises a mounting seat (621), a contact block (623) and an elastic member (622); the mounting seat (621) is arranged on two supporting portions (612); a sliding groove (613) is provided on the inner wall of one side opposite to the two supporting portions (612); the contact block (623) is slidingly arranged in the sliding groove (613); one end of the elastic member (622) is arranged on the contact block (623) and the other end is arranged on the mounting seat (621).

5. A deep foundation pit support structure according to claim 4, characterized in that: The abutment block (623) is provided with a clearance groove (624), and the support rod (42) is located in the clearance groove (624) when supporting the support plate (2).

6. A deep foundation pit support structure according to claim 1, characterized in that: The fixing device (3) comprises a fixing seat (31) and a fixing bolt (32); a through hole (22) is provided on the fixing seat (31) and the support plate (2); and the fixing bolt (32) passes through the through hole (22) and is threadedly connected to the foundation pit (1).

7. A deep foundation pit support structure according to claim 6, characterized in that: A first sealing gasket (33) is arranged on one end of the fixing seat (31) facing the supporting plate (2), and the first sealing gasket (33) abuts against the supporting plate (2). A second sealing gasket (34) is arranged on the surface of one end of the fixing seat (31) facing away from the supporting plate (2), and the head of the fixing bolt (32) abuts against the second sealing gasket (34).

8. The deep foundation pit support structure according to claim 1, characterized in that: A crossbeam (5) is provided in the middle portion of the support plate (2), a positioning assembly (51) is provided between the crossbeam (5) and the support plate (2), and the positioning assembly (51) fixes the crossbeam (5) on the support plate (2).

9. A deep foundation pit support structure according to claim 8, characterized in that: A plug-in block (52) is provided on one side of the cross beam (5) facing the support plate (2); the plug-in block (52) is in contact with the inner wall of the support plate (2) on the side facing the support plate (2); and the positioning assembly (51) positions the plug-in block (52) and the cross beam (5).

10. A deep foundation pit support structure according to claim 1, characterized in that: A sealing member (21) for preventing water seepage is provided between adjacent support plates (2).

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