A repeatable assembled steel support for foundation pit construction

Abstract

The present invention relates to the technical field of foundation pit supports, and specifically to a reusable assembled steel support for foundation pit construction, comprising an extended steel support, a butt-jointed steel support, a main steel support, an axial force supplementary steel support, two jacks, and two steel purlins. The butt-jointed steel support and the main steel support are fixedly connected, the axial force supplementary steel support is slidably connected to the inner wall of the main steel support, and both ends of the axial force supplementary steel support and the extended steel support are fixedly connected to the jacks, respectively. The present invention sets a quick disassembly and assembly mechanism in conjunction with an anti-deformation mechanism to limit the axis of the extended steel support, thereby preventing the connection between the extended steel support and the butt-jointed steel support from collapsing due to gravity when the axial force is insufficient. At the same time, the fixed plate on the gravity supplementary axial force mechanism is used to change the direction of gravity of the steel support, so that the gravity of the steel support always acts downward on the hinged plate, thereby driving the sliding plate and the axial force supplementary steel support to press against the foundation pit. This design not only shortens the installation time, but also effectively controls the influence of the deadweight of the steel support.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit supports, and in particular to a repeatable assembled steel support for foundation pit construction. Background Art

[0002] With the development of urban construction, underground space is being exploited and utilized more extensively, and the excavation area and depth of foundation pits are also increasing. The scientific and rational design of the horizontal structure of the foundation pit support has a significant impact on the subsequent construction of the main project. The reasonable calculation of the support axial force not only improves the economic efficiency of the support structure, but also facilitates the real-time evaluation of the safety performance of the support during the foundation pit excavation. However, for large foundation pits, due to the large support range, the large number of steel supports used, and the continuous change of support axial force as excavation progresses, it is difficult to meet the support requirements based solely on pre-calculated axial force and steel support length design.

[0003] The patent with application number: CN202311297955.3 discloses a prestressed adjustment device for steel supports used for foundation pit support. The two ends of the steel support are connected to the foundation pit side through steel purlins. The steel support is provided with an adjustment section that can be controlled to extend or shorten by an adjustment part. The prestressed adjustment device includes an adjustment part, which includes a sliding seat, a telescopic part and a clamping seat. The sliding seat is slidably connected to the steel purlin, allowing the adjustment part to switch positions between different steel supports.

[0004] However, the above invention patent still has some shortcomings in actual use: 1. The connection of the extended steel support still adopts a plurality of bolts, and when the axial force is insufficient, no corresponding anti-deformation mechanism is provided. The bolts will be deformed due to the weight of the steel support itself, and finally it will be difficult to disassemble; 2. The axial force is increased by providing a prestressed pressure adjustment device, but the difficulty of installation increases and the dead weight of the steel support itself also increases. Therefore, a repeatable assembled steel support for foundation pit construction is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the background technology and to propose a repeatable assembled steel support for foundation pit construction.

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

[0007] A reusable assembled steel support for foundation pit construction includes an extended steel support, a butt-jointed steel support, a main steel support, an axial force supplementary steel support, two jacks, and two steel purlins. The butt-jointed steel support is fixedly connected to the main steel support, the axial force supplementary steel support is slidably connected to the inner wall of the main steel support, both ends of the axial force supplementary steel support and the extended steel support are respectively fixedly connected to the jacks, the two jacks are respectively fixedly connected to the two steel purlins via two bearing seats, and the two steel purlins are installed on both sides of the foundation pit. The invention also includes:

[0008] The quick disassembly and assembly mechanism includes an eccentric head, a butt joint and a first spring, wherein the eccentric head is fixedly connected to the eccentric shaft, the eccentric shaft is rotatably connected to the butt joint, the butt joint is fixedly connected to the butt joint steel support, and an integral drive assembly is provided on the inner wall of the butt joint steel support;

[0009] The anti-deformation mechanism includes a support cam, a first spring and a clamping block, wherein the support cam is fixedly connected to the eccentric shaft, the clamping block is slidably connected to the docking steel support, and the first spring is fixedly connected between the clamping block and the docking steel support;

[0010] The gravity axial force compensation mechanism includes a sliding plate, a hinged plate, a mounting column and a mounting block. The sliding plate is slidably connected to the inner wall of the main steel support, the hinged plate is hinged to the sliding plate, the mounting block is fixedly connected to the main steel support, and the mounting column is fixedly connected to the mounting block.

[0011] And an anti-loosening mechanism, which is installed on the gravity axial force compensation mechanism.

[0012] Preferably, there are several quick disassembly and assembly mechanisms, which are distributed in a circular array. The end of the extended steel support is fixedly connected with a connecting section, and the outer wall of the connecting section is provided with docking holes. The number of the docking holes is consistent with that of the quick disassembly and assembly mechanisms. The end of the extended steel support is provided with an anti-deformation groove.

[0013] Preferably, the overall drive assembly includes a first gear, a telescopic slide rod, a bolt and a connecting seat, the first gear is rotatably connected to the outer wall of the docking steel support, the telescopic slide rod is fixedly connected to the first gear, the end of the telescopic slide rod away from the first gear is fixedly connected to the bolt, the outer wall of the bolt is threadedly connected to the connecting seat, and the connecting seat is fixedly connected to the docking steel support.

[0014] Preferably, the overall drive assembly also includes a rotating ring, an upper gear block group, several second gears and several first springs, the second gear of the locking rod is fixedly connected to several eccentric shafts respectively, the upper gear block group is fixedly connected to the rotating ring, and several lower gear block groups are fixedly connected to the rotating ring, the lower gear block group is meshed with the corresponding second gear, the upper gear block group is meshed with the outer wall of the first gear, and the rotating ring is rotatably connected to the inner wall of the docking steel support.

[0015] Preferably, a baffle is fixedly connected to the inner wall of the main steel support, and a third spring is fixedly connected between the main steel support and the mounting block.

[0016] Preferably, the outer wall of the main steel support is fixedly connected to two fixed blocks, the outer wall of the steel purlin is fixedly connected to two fixed blocks, the bottom outer wall of the main steel support is fixedly connected to a fixed plate, and the outer walls of the two fixed blocks are fixedly connected to a traction rope, and the traction rope passes through the fixed block and the baffle and is fixedly connected to the hinged plate.

[0017] Preferably, the anti-loosening mechanism includes a sliding cylinder, an inclined push plate and a second spring, the sliding cylinder is slidably connected to the outer wall of the mounting column, the inclined push plate is fixedly connected to the sliding cylinder, and the second spring is fixedly connected between the mounting block and the inclined push plate.

[0018] Preferably, the gravity axial force compensation mechanism also includes a connecting rod, an extrusion plate, a sliding seat, a resistance plate and a fourth spring. The connecting rod is slidingly connected to the main steel support, and the end of the connecting rod is slidingly connected to the inclined push plate through the set sliding groove and slider. The sliding seat is slidingly connected to the connecting rod, the resistance plate is fixedly connected to the extrusion plate, the extrusion plate is slidingly connected to the sliding seat, and the fourth spring is fixedly connected between the extrusion plate and the fourth spring.

[0019] Compared with the existing technology, the present invention has the following beneficial effects:

[0020] This invention utilizes a quick-disassembly mechanism linked to an anti-deformation mechanism to limit the axis of the extended steel support, preventing gravity-induced collapse at the connection between the extended and docking steel supports when axial force is insufficient. Simultaneously, the fixed plate on the gravity-compensating axial force mechanism redirects the gravity of the steel support, ensuring that the steel support's gravity consistently acts downward on the hinge plate, pushing it to continuously compress the sliding plate, which in turn drives the sliding plate and the axial force-compensating steel support against the foundation pit. This design not only shortens installation time but also effectively controls the influence of the steel support's own weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 This is a partial structural diagram of the gravity axial force compensation mechanism of the present invention;

[0023] Figure 3 This invention Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0024] Figure 4 This is a schematic diagram of the internal structure of the butt-jointed steel support of the present invention;

[0025] Figure 5 This invention Figure 4 A schematic diagram of the partially enlarged structure at point B in the middle;

[0026] Figure 6 It is a schematic diagram of the overall drive assembly structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the main steel support of the present invention;

[0028] Figure 8 This invention Figure 7 A schematic diagram of the partially enlarged structure at point C in the middle;

[0029] Figure 9 This invention Figure 7 The schematic diagram of the partially enlarged structure at D in the middle;

[0030] Figure 10 It is a schematic diagram of the internal structure of the sliding seat of the present invention.

[0031] Figure: 1, steel purlin; 2, bearing seat; 3, jack; 4, extended steel support; 5, connecting section; 6, butt joint steel support; 7, eccentric head; 8, butt joint; 9, fixed block 1; 10, main steel support; 11, sliding plate; 12, baffle; 13, mounting column; 14, traction rope; 15, axial force supplementary steel support; 16, fixed block; 17, extrusion plate; 18, sliding seat; 19, connecting rod; 20, hinged plate; 21, fixed plate; 22, butt joint hole; 23, anti-deformation groove; 24, third spring; 25 , eccentric shaft; 26, rotating ring; 27, supporting cam; 28, first spring; 29, clamping block; 30, mounting block; 31, second spring; 32, first gear; 33, telescopic slide rod; 34, bolt; 35, connecting seat; 36, contact plate; 37, second gear; 38, lower gear block group; 39, upper gear block group; 40, sliding cylinder; 41, inclined push plate; 42, fourth spring; 101, quick disassembly and assembly mechanism; 202, anti-deformation mechanism; 303, anti-loosening mechanism; 404, gravity axial force compensation mechanism. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] Reference Figures 1-10A reusable assembled steel support for foundation pit construction includes an extended steel support 4, a butt-jointed steel support 6, a main steel support 10, an axial force supplementary steel support 15, two jacks 3, and two steel purlins 1. The butt-jointed steel support 6 is fixedly connected to the main steel support 10, the axial force supplementary steel support 15 is slidably connected to the inner wall of the main steel support 10, the ends of the axial force supplementary steel support 15 and the extended steel support 4 are respectively fixedly connected to the jacks 3, the two jacks 3 are respectively fixedly connected to the two steel purlins 1 through two bearing seats 2, and the two steel purlins 1 are installed on both sides of the foundation pit. The invention also includes:

[0035] The quick disassembly mechanism 101 includes an eccentric head 7, a docking head 8, and a first spring 28. The eccentric head 7 is fixedly connected to the eccentric shaft 25, the eccentric shaft 25 is rotatably connected to the docking head 8, and the docking head 8 is fixedly connected to the docking steel support 6. The inner wall of the docking steel support 6 is provided with an integral drive assembly.

[0036] The anti-deformation mechanism 202 includes a support cam 27, a first spring 28, and a clamping block 29. The support cam 27 is fixedly connected to the eccentric shaft 25. The clamping block 29 is slidably connected to the docking steel support 6. The first spring 28 is fixedly connected between the clamping block 29 and the docking steel support 6.

[0037] The gravity axial force compensation mechanism 404 includes a sliding plate 11, a hinged plate 20, a mounting column 13, and a mounting block 30. The sliding plate 11 is slidably connected to the inner wall of the main steel support 10, the hinged plate 20 is hinged to the sliding plate 11, the mounting block 30 is fixedly connected to the main steel support 10, and the mounting column 13 is fixedly connected to the mounting block 30.

[0038] And the anti-loosening mechanism 303, the anti-loosening mechanism 303 is installed on the gravity axial force compensation mechanism 404.

[0039] Among them, there are several quick disassembly and assembly mechanisms 101, and the quick disassembly and assembly mechanisms 101 are distributed in a circular array. The end of the extended steel support 4 is fixedly connected with a connecting section 5, and the outer wall of the connecting section 5 is provided with docking holes 22. The number of the docking holes 22 is consistent with that of the quick disassembly and assembly mechanisms 101. The end of the extended steel support 4 is provided with an anti-deformation groove 23.

[0040] Among them, the overall driving assembly includes a first gear 32, a telescopic slide rod 33, a bolt 34 and a connecting seat 35. The first gear 32 is rotatably connected to the outer wall of the docking steel support 6, the telescopic slide rod 33 is fixedly connected to the first gear 32, and the end of the telescopic slide rod 33 away from the first gear 32 is fixedly connected to the bolt 34. The outer wall of the bolt 34 is threadedly connected to the connecting seat 35, and the connecting seat 35 is fixedly connected to the docking steel support 6.

[0041] Among them, the overall drive assembly also includes a rotating ring 26, an upper gear block group 39, several second gears 37 and several first springs 28. The second gear 37 of the locking rod is fixedly connected to several eccentric shafts 25 respectively, the upper gear block group 39 is fixedly connected to the rotating ring 26, and several lower gear block groups 38 are all fixedly connected to the rotating ring 26. The lower gear block group 38 is engaged with the corresponding second gear 37, the upper gear block group 39 is engaged with the outer wall of the first gear 32, and the rotating ring 26 is rotatably connected to the inner wall of the docking steel support 6.

[0042] When the cam 27 is in the working state, the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state, and the cam 27 is in the working state, so that the cam 27 is in the working state,

[0043] The inner wall of the main steel support 10 is fixedly connected with a baffle 12 , and a third spring 24 is fixedly connected between the main steel support 10 and the mounting block 30 .

[0044] Among them, the outer wall of the main steel support 10 is fixedly connected to two fixed blocks 9, the outer wall of the steel purlin 1 is fixedly connected to two fixed blocks 16, the bottom outer wall of the main steel support 10 is fixedly connected to a fixed plate 21, and the outer walls of the two fixed blocks 9 are fixedly connected to a traction rope 14, and the traction rope 14 passes through the fixed block 16 and the baffle 12 and is fixedly connected to the hinged plate 20.

[0045] Among them, the anti-loosening mechanism 303 includes a sliding cylinder 40, an inclined push plate 41 and a second spring 31. The sliding cylinder 40 is slidably connected to the outer wall of the mounting column 13, the inclined push plate 41 is fixedly connected to the sliding cylinder 40, and the second spring 31 is fixedly connected between the mounting block 30 and the inclined push plate 41.

[0046] In this embodiment, since the eccentric head 7 and the eccentric shaft 25 are eccentrically arranged relative to the docking joint 8, the eccentric head 7 naturally presses the connecting section 5 against the docking steel support 6 after rotation, completing the rapid docking. Then, the sliding seat 18 is moved downward, and the extrusion plate 17 and the contact plate 36 squeeze the bolt 34 to prevent the bolt 34 from falling out.

[0047] Among them, the gravity axial force compensation mechanism 404 also includes a connecting rod 19, an extrusion plate 17, a sliding seat 18, a resistance plate 36 and a fourth spring 42. The connecting rod 19 is slidingly connected to the main steel support 10, and the end of the connecting rod 19 is slidingly connected to the inclined push plate 41 through the set sliding groove and slider. The sliding seat 18 is slidingly connected to the connecting rod 19, the resistance plate 36 is fixedly connected to the extrusion plate 17, the extrusion plate 17 is slidingly connected to the sliding seat 18, and the fourth spring 42 is fixedly connected between the extrusion plate 17 and the fourth spring 42.

[0048] In this embodiment, the connected steel support is connected to the bearing seat 2 on both sides, the pressure of the jack 3 is adjusted, and then the traction rope 14 is hung on the fixed block 16. The fixed block 16 can be in the form of a hook. The traction rope 14 is set to be in a taut state after being hung on the fixed block 16. Therefore, when the foundation pit is deformed and the pressure of the jack 3 is insufficient, the traction rope 14 between the fixed block 16 and the fixed block 9 is pulled by the gravity of the steel support itself, and the direction of the force is changed through the fixed plate 21, so that the gravity acts on On the hinged plate 20, the gravity of the steel support always pulls the hinged plate 20 downward, so that the hinged plate 20 will always squeeze the sliding plate 11, driving the sliding plate 11 and the axial force supplementary steel support 15 to squeeze the foundation pit. In the initial state, the sliding plate 11 is close to the baffle 12. At the same time, when the hinged plate 20 moves downward, it will also drive the sliding cylinder 40 and the inclined push plate 41 to move downward, so that the sliding seat 18, the extrusion plate 17 and the contact plate 36 on the connecting rod 19 squeeze the bolt 34, forming a limit on the bolt 34, thereby ensuring the stability of the connection.

[0049] The following is a detailed explanation of the specific working principle and method of use of the present invention: when in use, the sliding seat 18 is moved up along the connecting rod 19 so that the contact plate 36 will not block the bolt 34. At the same time, the extended steel support 4 is docked with the docking steel support 6. After the eccentric head 7 passes through the docking hole 22, the end of the extended steel support 4 also extends into the docking steel support 6. The worker then turns the bolt 34, and the bolt 34 is screwed into the connecting seat 35 toward the first gear 32. The telescopic slide rod 33 is compressed. At the same time, the first gear 32 rotates through the upper gear block group 39 to drive the rotating ring 26 to rotate. The rotating ring 26 drives the second gear 37 to rotate through the lower gear block group 38. The second gear 37 drives the supporting cam 27 to rotate through the eccentric shaft 25. The protruding side of the supporting cam 27 squeezes the block 29, forcing the block 29 to extend into the anti-deformation groove 23, thereby limiting the axis of the extended steel support 4 and preventing the connection between the extended steel support 4 and the docking steel support 6 from collapsing due to gravity when the axial force is insufficient.

[0050] At the same time, since the eccentric head 7 and the eccentric shaft 25 are eccentrically arranged relative to the docking joint 8, the eccentric head 7 naturally presses the connecting section 5 against the docking steel support 6 after rotation, completing the rapid docking. Then the sliding seat 18 is moved downward, and the extrusion plate 17 and the contact plate 36 squeeze the bolt 34 to prevent the bolt 34 from falling out.

[0051] Connect the connected steel support to the bearing seats 2 on both sides, adjust the pressure of the jack 3, and then hang the traction rope 14 on the fixed block 16. The fixed block 16 can be in the form of a hook. Set the traction rope 14 to be in a taut state after hanging on the fixed block 16. Therefore, when the foundation pit is deformed and the pressure of the jack 3 is insufficient, the traction rope 14 between the fixed block 16 and the fixed block 9 is pulled by the gravity of the steel support itself, and the direction of the force is changed through the fixed plate 21, so that the gravity acts on the hinged plate 2. 0, so the gravity of the steel support always pulls the hinge plate 20 downward, so that the hinge plate 20 will always squeeze the sliding plate 11, driving the sliding plate 11 and the axial force supplementary steel support 15 to squeeze the foundation pit. In the initial state, the sliding plate 11 is close to the baffle 12. At the same time, when the hinge plate 20 moves downward, it will also drive the sliding cylinder 40 and the inclined push plate 41 to move downward, so that the sliding seat 18, the extrusion plate 17 and the contact plate 36 on the connecting rod 19 squeeze the bolt 34, forming a limit on the bolt 34, and ensuring the stability of the connection.

[0052] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are common means well known to those skilled in the art.

[0053] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A reusable assembled steel support for foundation pit construction, comprising an extended steel support (4), a butt-jointed steel support (6), a main steel support (10), an axial force supplementary steel support (15), two jacks (3) and two steel purlins (1), wherein the butt-jointed steel support (6) and the main steel support (10) are fixedly connected, the axial force supplementary steel support (15) is slidably connected to the inner wall of the main steel support (10), the two ends of the axial force supplementary steel support (15) and the extended steel support (4) are respectively fixedly connected to the jacks (3), the two jacks (3) are respectively fixedly connected to the two steel purlins (1) through two bearing seats (2), and the two steel purlins (1) are installed on both sides of the foundation pit, characterized in that Also includes: A quick disassembly and assembly mechanism (101) comprises an eccentric head (7), a docking head (8) and a first spring (28), wherein the eccentric head (7) is fixedly connected to the eccentric shaft (25), the eccentric shaft (25) is rotatably connected to the docking head (8), the docking head (8) is fixedly connected to the docking steel support (6), and an integral drive assembly is provided on the inner wall of the docking steel support (6); The anti-deformation mechanism (202) comprises a support cam (27), a first spring (28) and a clamping block (29), wherein the support cam (27) is fixedly connected to the eccentric shaft (25), the clamping block (29) is slidably connected to the docking steel support (6), and the first spring (28) is fixedly connected between the clamping block (29) and the docking steel support (6); The gravity axial force compensation mechanism (404) comprises a sliding plate (11), a hinged plate (20), a mounting column (13) and a mounting block (30), wherein the sliding plate (11) is slidably connected to the inner wall of the main steel support (10), the hinged plate (20) is hinged to the sliding plate (11), the mounting block (30) is fixedly connected to the main steel support (10), and the mounting column (13) is fixedly connected to the mounting block (30); and an anti-loosening mechanism (303), the anti-loosening mechanism (303) being mounted on the gravity axial force compensation mechanism (404); A baffle (12) is fixedly connected to the inner wall of the main steel support (10), and a third spring (24) is fixedly connected between the main steel support (10) and the mounting block (30); The outer wall of the main steel support (10) is fixedly connected to two fixing blocks (9), the outer wall of the steel purlin (1) is fixedly connected to two fixing blocks (16), the bottom outer wall of the main steel support (10) is fixedly connected to a fixing plate (21), and the outer walls of the two fixing blocks (9) are fixedly connected to a traction rope (14), and the traction rope (14) passes through the fixing block (16) and the baffle (12) and is fixedly connected to the hinge plate (20).

2. The reusable steel support for foundation pit construction according to claim 1, characterized in that: A plurality of quick disassembly and assembly mechanisms (101) are provided, and the quick disassembly and assembly mechanisms (101) are distributed in a circumferential array. The end of the extended steel support (4) is fixedly connected to a connecting section (5), and the outer wall of the connecting section (5) is provided with docking holes (22). The number of the docking holes (22) is the same as the number of the quick disassembly and assembly mechanisms (101). The end of the extended steel support (4) is provided with an anti-deformation groove (23).

3. The reusable steel support for foundation pit construction according to claim 1 is characterized in that: The overall driving assembly includes a first gear (32), a telescopic slide rod (33), a bolt (34) and a connecting seat (35), wherein the first gear (32) is rotatably connected to the outer wall of the docking steel support (6), the telescopic slide rod (33) is fixedly connected to the first gear (32), an end of the telescopic slide rod (33) away from the first gear (32) is fixedly connected to the bolt (34), the outer wall of the bolt (34) is threadedly connected to the connecting seat (35), and the connecting seat (35) is fixedly connected to the docking steel support (6).

4. The reusable steel support for foundation pit construction according to claim 3 is characterized by: The integral drive assembly further comprises a rotating ring (26), an upper tooth block group (39), a plurality of second gears (37) and a plurality of first springs (28); the second gears (37) of the locking rod are respectively fixedly connected to the plurality of eccentric shafts (25); the upper tooth block group (39) is fixedly connected to the rotating ring (26); the plurality of lower tooth block groups (38) are all fixedly connected to the rotating ring (26); the lower tooth block groups (38) are meshed with the corresponding second gears (37); the upper tooth block group (39) is meshed with the outer wall of the first gear (32); and the rotating ring (26) is rotatably connected to the inner wall of the docking steel support (6).

5. The repeatable assembled steel support for foundation pit construction according to claim 1, characterized in that: The anti-loosening mechanism (303) comprises a sliding cylinder (40), an inclined push plate (41) and a second spring (31), wherein the sliding cylinder (40) is slidably connected to the outer wall of the mounting column (13), the inclined push plate (41) is fixedly connected to the sliding cylinder (40), and the second spring (31) is fixedly connected between the mounting block (30) and the inclined push plate (41).

6. The repeatable assembled steel support for foundation pit construction according to claim 5, characterized in that: The gravity axial force compensation mechanism (404) further includes a connecting rod (19), an extrusion plate (17), a sliding seat (18), a contact plate (36) and a fourth spring (42), wherein the connecting rod (19) is slidably connected to the main steel support (10), the end of the connecting rod (19) is slidably connected to the inclined push plate (41) through a set slide groove and a slider, the sliding seat (18) is slidably connected to the connecting rod (19), the contact plate (36) is fixedly connected to the extrusion plate (17), the extrusion plate (17) is slidably connected to the sliding seat (18), and the fourth spring (42) is fixedly connected between the extrusion plate (17) and the fourth spring (42).

Images