Quick-construction supporting belt replacing device capable of being disassembled and recycled and construction method

Abstract

The invention discloses a quick-construction supporting belt replacing device capable of being disassembled and recycled and a construction method, and relates to the technical field of underground structure engineering foundation pit supporting. The quick-construction supporting belt replacing device comprises a steel plate box body, and a left supporting steel plate and a right supporting steel plate which are connected through a telescopic assembly are arranged on the two sides of the steel plate box body correspondingly; a manual rotating disc assembly is assembled in the middle of the upper portion of the steel plate box body, the manual rotating disc assembly is fixedly connected with the top end of a vertical rod, the vertical rod vertically penetrates through the steel plate box body and is rotationally connected with the steel plate box body through a bottom bearing, and horizontal bevel gears are fixedly connected to the upper section, the middle section and the lower section of the vertical rod. The device is hoisted to a designated position between a foundation pit supporting pile and a basement outer wall through hoisting equipment, the vertical rod is driven to rotate by means of the manual rotating disc assembly, the telescopic assembly is driven through meshing transmission of the horizontal bevel gear and the vertical bevel gear to achieve rapid movement of the supporting steel plate, complex pouring and maintenance processes are not needed, and the construction efficiency is improved. The mounting efficiency of the support replacing belt is obviously improved, and the construction period is effectively shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground structure engineering foundation pit support, in particular to a detachable and reusable rapid construction support belt replacement device and construction method. BACKGROUND

[0002] In the field of underground structure construction, foundation pit support is a key link to ensure construction safety, especially for deep underground engineering. The stability of foundation pit support directly affects the safety and cost of the project. With the advancement of underground structure construction, when the main structure of the basement is completed to a certain height, support replacement operation is needed to replace the original horizontal steel support. At this time, the method of pouring concrete support belt is usually used. As a traditional support replacement method, concrete support belt is widely used in deep foundation pit engineering, but its construction process and structural characteristics have a significant impact on project progress and cost.

[0003] Traditional concrete support belt has many limitations: the construction process is complicated, from formwork erection, concrete pouring to maintenance, etc. It requires a lot of manpower and material resources; the concrete support belt must wait until its strength reaches the design requirement before the original horizontal steel support can be removed, which significantly prolongs the construction period and seriously affects the overall progress of the project; the concrete support belt is a one-time use structure and cannot be reused, which increases the material cost. SUMMARY

[0004] The purpose of the present application is to provide a detachable and reusable rapid construction support belt replacement device and construction method to solve the problems existing in the background art.

[0005] The purpose of the present application can be achieved by the following technical solutions: A detachable and reusable rapid construction support belt replacement device, comprising a steel plate box body, the steel plate box body is provided with a left support steel plate and a right support steel plate connected by a telescopic assembly on both sides; A manual turntable assembly is assembled at the middle position of the upper part of the steel plate box body, the manual turntable assembly is fixedly connected with the top end of a vertical rod, the vertical rod is vertically arranged and rotatably connected with the steel plate box body through a bottom bearing, and horizontal bevel gears are fixedly connected to the upper, middle and lower sections of the vertical rod; The manual turntable assembly can be driven by hand to rotate the vertical rod and horizontal bevel gears, and then drive the telescopic assembly to extend or retract to quickly adjust the two support steel plates.

[0006] As a further scheme of the present application: the telescopic assembly comprises a second steel pipe fixedly welded with the steel plate box body, and a drill rod is embedded in the second steel pipe, one end of the drill rod close to the vertical bevel gear is fixedly connected with the vertical bevel gear, and the other end is fixedly connected with a rotating disc; The rotating disc is fixedly connected with a rotating shaft on the side away from the drill rod, and a threaded steel sleeve is threadedly connected with the rotating shaft, and a first steel pipe is sleeved and fixedly connected with the threaded steel sleeve, and a steel end plate is fixedly connected with the first steel pipe away from the threaded steel sleeve.

[0007] As a further scheme of the present application, the manual rotating disc assembly comprises a rotating shaft fixedly connected with the top end of the vertical rod, and a rotating wheel is sleeved and fixedly connected with the upper portion of the rotating shaft, and a positioning ring is fixedly installed on the outer portion of the rotating shaft; A protective ring is fixedly connected with the top portion of the steel plate box corresponding to the position of the rotating shaft, and a positioning bolt is threadedly connected with the outer periphery of the protective ring, and the end portion of the positioning bolt is movable into the protective ring to limit the rotation of the rotating shaft.

[0008] As a further scheme of the present application, the manual rotating disc assembly drives the vertical rod and the rotating shaft to rotate synchronously by rotating the rotating wheel leftward and rightward, thereby driving the horizontal bevel gear fixedly connected with the vertical rod to rotate together with the vertical rod.

[0009] As a further scheme of the present application, vertical bevel gears are correspondingly arranged on the left and right sides of the horizontal bevel gears of the upper, middle and lower three sections of the vertical rod, the horizontal bevel gears and the vertical bevel gears in the telescopic assembly are mutually engaged, and the horizontal bevel gears can drive the vertical bevel gears to rotate synchronously when the horizontal bevel gears rotate.

[0010] As a further scheme of the present application, the outer ring of the bearing at the bottom end of the vertical rod is fixedly welded with the inner wall at the bottom end of the steel plate box, and the inner ring is fixedly connected with the outer periphery at the bottom end of the vertical rod, so that the vertical rod can stably rotate relative to the steel plate box.

[0011] As a further scheme of the present application, two lifting rings for hoisting are fixedly connected with the top portion of the steel plate box, the two lifting rings are symmetrically welded at the two ends of the top portion of the steel plate box, the ring bodies of the lifting rings are consistent with the length direction of the steel plate box, and the lifting rings are used for cooperating with hoisting equipment to realize the hoisting and installation of the device.

[0012] As a further scheme of the present application, the round holes correspond one by one to the mounting positions of the telescopic assembly, and provide avoiding spaces for the telescopic movement of the telescopic assembly.

[0013] As a further scheme of the present application, the side away from the first steel pipe of the steel end plate is fixedly welded with the inner side of the left supporting steel plate or the right supporting steel plate, so that the telescopic movement of the telescopic assembly can directly drive the supporting steel plate to move synchronously.

[0014] The quick construction method of the detachable week turnover supporting device for foundation pit support comprises the following steps: After the foundation pit support and the basement outer wall are constructed and the concrete strength reaches the standard; The device is hoisted to the gap between the foundation pit support pile and the basement outer wall by hoisting equipment through the lifting rings, and is vertically installed according to the drawing. Rotating the rotating wheel causes the vertical rod to rotate; The vertical rod drives the horizontal bevel gear to rotate, which in turn drives the vertical bevel gear and the connected rotating disk and shaft to rotate. The rotation of the shaft causes the threaded steel sleeve to move the first steel pipe, the steel end plate, and the supporting steel plate. After the supporting steel plate is in close contact with the support piles and the main body of the basement, the positioning bolts are tightened to lock it in place; after the underground structure is completed, the positioning bolts are loosened to allow the support to retract and the device is removed.

[0015] The beneficial effects of this invention are: (1) The present invention uses a lifting device to lift the device to a designated position between the foundation pit support pile and the basement exterior wall. The vertical rod is driven to rotate by the manual turntable assembly. Through the meshing transmission of the horizontal bevel gear and the vertical bevel gear, the telescopic assembly is driven to realize the rapid movement of the support steel plate. There is no need for complicated pouring and curing process, which significantly improves the installation efficiency of the replacement support belt and effectively shortens the construction cycle. (2) The present invention can realize the extension and retraction adjustment of the support steel plate by manually rotating the turntable assembly. It can flexibly adjust the support length according to the actual distance between the foundation pit support pile and the basement exterior wall, ensuring that the support steel plate is in close contact with the support pile and the basement main structure, meeting the support requirements under different working conditions, and has stronger adaptability. Attached Figure Description

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] Figure 1 This is a perspective view of the support replacement device of the present invention; Figure 2 This is a cross-sectional view of the support replacement device of the present invention; Figure 3 This is a front sectional view of the telescopic component of the support replacement device of the present invention; Figure 4 For the present invention Figure 1 Enlarged view of the manual turntable assembly of the intermediate support device; Figure 5 For the present invention Figure 2 Enlarged view of the bevel gear meshing in the intermediate support device.

[0018] In the diagram: 1. Steel plate housing; 2. Left support steel plate; 3. Telescopic assembly; 4. Manual turntable assembly; 5. Lifting ring; 6. Right support steel plate; 7. Vertical rod; 8. Horizontal bevel gear; 9. Bearing; 10. Circular hole; 31. First steel pipe; 32. Threaded steel sleeve; 33. Rotating shaft; 34. Second steel pipe; 35. Rotating disk; 36. Drill rod; 37. Vertical bevel gear; 38. Steel end plate; 41. Positioning bolt; 42. Protective ring; 43. Rotating wheel; 44. Rotating shaft; 45. Positioning ring. Detailed Implementation

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0020] Embodiment one Please refer to Figures 1-5 The present application is a detachable and reusable fast construction support belt changing device, which comprises a steel plate box body 1, left and right support steel plates 2 and 6 connected by telescopic assemblies 3 on both sides of the steel plate box body 1. A manual turntable assembly 4 is arranged at the upper middle position of the steel plate box body 1, the manual turntable assembly 4 is fixedly connected with the top end of a vertical rod 7, the vertical rod 7 is vertically arranged and rotatably connected with the steel plate box body 1 through a bottom bearing 9, and horizontal bevel gears 8 are fixedly connected with the upper, middle and lower sections of the vertical rod 7. The manual turntable assembly 4 is driven manually to rotate the vertical rod 7 and the horizontal bevel gears 8, so as to drive the telescopic assemblies 3 to extend or retract, thereby realizing the fast adjustment of the two support steel plates.

[0021] In the present application, the telescopic assembly 3 comprises a second steel pipe 34 fixedly welded with the steel plate box body 1, a drill rod 36 is embedded in the second steel pipe 34, one end of the drill rod 36 close to a vertical bevel gear 37 is fixedly connected with the vertical bevel gear 37, and the other end is fixedly connected with a rotating disc 35. A rotating shaft 33 is fixedly connected with one side of the rotating disc 35 away from the drill rod 36, a threaded steel sleeve pipe 32 is threadedly connected with the outer periphery of the rotating shaft 33, a first steel pipe 31 is sleeved and fixedly connected with the outer periphery of the threaded steel sleeve pipe 32, and a steel end plate 38 is fixedly connected with one end of the first steel pipe 31 away from the threaded steel sleeve pipe 32.

[0022] It should be noted that the threaded transmission is converted into the linear displacement of the support steel plate through the connection of the steel end plate 38 and the support steel plate, so as to realize the support length adjustment.

[0023] In the present application, the manual turntable assembly 4 comprises a rotating shaft 44 fixedly connected with the top end of the vertical rod 7, a rotating wheel 43 is sleeved and fixedly connected with the upper portion of the rotating shaft 44, and a positioning ring 45 is fixedly installed on the outer periphery of the rotating shaft 44. A protective ring 42 is fixedly connected with the position corresponding to the rotating shaft 44 on the top of the steel plate box body 1, a positioning bolt 41 is threadedly connected with the outer periphery of the protective ring 42, and the end portion of the positioning bolt 41 can be moved into the protective ring 42 to limit the rotation of the rotating shaft 44.

[0024] In the application, the manual rotary disc assembly 4 drives the rotating shaft 44 and the vertical rod 7 to rotate synchronously by rotating the rotating wheel 43 left and right, and then drives the horizontal bevel gear 8 fixed to the vertical rod 7 to rotate with the vertical rod 7.

[0025] In the application, the vertical rod 7 is provided with vertical bevel gears 37 on the left and right sides of the upper, middle and lower three sections of the horizontal bevel gear 8, and the horizontal bevel gear 8 and the vertical bevel gear 37 in the telescopic assembly 3 are meshed with each other, so that the horizontal bevel gear 8 can drive the vertical bevel gear 37 to rotate synchronously when the horizontal bevel gear 8 rotates.

[0026] More specifically, the vertical rod 7 is provided with vertical bevel gears 37 on the left and right sides of the upper, middle and lower three sections of the horizontal bevel gear 8, and the horizontal bevel gear 8 and the vertical bevel gear 37 in the telescopic assembly 3 form a spatial staggered shaft bevel gear pair, so that the horizontal bevel gear 8 can drive the vertical bevel gear 37 to rotate synchronously around its own axis through the circumferential force transmission of gear meshing when the horizontal bevel gear 8 rotates, and the rotating motion of the vertical rod is converted into the axial telescopic motion of the telescopic assembly.

[0027] In the application, the outer ring of the bearing 9 at the bottom end of the vertical rod 7 is welded and fixed to the inner wall at the bottom end of the steel plate box body 1, and the inner ring is fixed to the outer periphery at the bottom end of the vertical rod 7, so that the vertical rod 7 can stably rotate relative to the steel plate box body 1.

[0028] More specifically, the outer ring of the bearing 9 at the bottom end of the vertical rod 7 is welded and fixed to the inner wall at the bottom end of the steel plate box body 1, and the inner ring is fixed to the outer periphery at the bottom end of the vertical rod 7 through interference fit, so that the vertical rod 7 can stably rotate around its own axis relative to the steel plate box body 1 through the rotation constraint of the bearing, and simultaneously bears the radial load during the rotation of the vertical rod, thereby guaranteeing the stability of power transmission.

[0029] In the application, two lifting rings 5 for lifting are fixed to the top of the steel plate box body 1, the two lifting rings 5 are symmetrically welded to the two ends of the top of the steel plate box body 1, the ring bodies of the lifting rings 5 are consistent with the length direction of the steel plate box body 1, and the lifting rings 5 are used for cooperating with hoisting equipment to realize the lifting installation of the device.

[0030] In the application, three round holes 10 are formed at the left and right ends of the steel plate box body 1, and the round holes 10 are uniformly distributed along the height direction of the steel plate box body 1, and the round holes 10 correspond to the mounting positions of the telescopic assembly 3 one by one, thereby providing a space for the telescopic motion of the telescopic assembly 3.

[0031] In the application, the side of the steel end plate 38 away from the first steel pipe 31 is welded and fixed to the inner side of the left supporting steel plate 2 or the right supporting steel plate 6, so that the telescopic motion of the telescopic assembly 3 can directly drive the supporting steel plate to move synchronously.

[0032] In the implementation process, the rotating wheel 43 of the manual rotating disc assembly 4 is manually rotated, the rotating wheel 43 is fixedly connected with the rotating shaft 44, the rotating shaft 44 is rotated, and then the vertical rod 7 fixedly connected with the rotating shaft 44 is synchronously rotated, the horizontal conical gear 8 fixedly connected with the vertical rod 7 rotates with the vertical rod 7, as a driving end of power transmission, the rotation of the vertical rod 7 is transmitted to the vertical conical gear 37 engaged with the vertical rod 7 by using the meshing characteristics of the conical gear; The vertical conical gear 37 is fixedly connected with one end of the drill rod 36, the vertical conical gear 37 drives the drill rod 36, the rotating disc 35 and the rotating shaft 33 to rotate, the outer periphery of the rotating shaft 33 is threadedly connected with the threaded steel sleeve 32, according to the screw transmission principle, when the rotating shaft 33 rotates, the threaded steel sleeve 32 moves along the rotating shaft 33 in the axial direction, and then drives the first steel pipe 31, the steel end plate 38 and the left or right supporting steel plate 2 or 6 to move, so that the supporting steel plate is extended or retracted, the support adjustment of the foundation pit support is completed, when the supporting steel plate is in close contact with the support pile and the basement main body, the positioning bolt 41 is tightened, the positioning bolt 41 is threadedly connected with the protective ring 42 along the middle part of the positioning ring 45, the rotating shaft 44 is limited to rotate, and the supporting state is locked; the reverse operation can be performed when the device is removed; After the construction is completed, the supporting steel plate is retracted by loosening the positioning bolt 41 and rotating the rotating wheel 43, the device as a whole can be lifted and removed by using the lifting ring 5 in cooperation with the hoisting equipment, after the removed device is inspected and simply maintained, the device can be transported to other foundation pit projects, the support replacement operation is repeatedly performed, the turnover use is realized, and the construction cost is reduced.

[0033] Example two The quick construction method of the detachable turnover support device for the foundation pit support comprises the following steps. After the foundation pit support and the basement outer wall are constructed and the concrete strength is up to the standard; The device is lifted and transported to the gap between the foundation pit support pile and the basement outer wall by using the hoisting equipment through the lifting ring 5, and is vertically installed according to the drawing support replacement position; The rotating wheel 43 is rotated to drive the vertical rod 7 to rotate; The vertical rod 7 drives the horizontal conical gear 8 to rotate, and drives the vertical conical gear 37, the rotating disc 35 and the rotating shaft 33 connected with the vertical conical gear 37 to rotate; The rotating shaft 33 rotates to drive the threaded steel sleeve 32 to drive the first steel pipe 31, the steel end plate 38 and the supporting steel plate to move; After the supporting steel plate is in close contact with the support pile and the basement main body, the positioning bolt 41 is locked; after the underground structure is completed, the positioning bolt 41 is loosened to make the supporting steel plate retract and remove the device.

[0034] During the implementation process, when the foundation pit support construction is completed, the basement outer wall is poured, and the concrete strength reaches the design and construction specification requirements, the operation conditions for replacing the support are met, and each part of the support replacing device is checked: it is confirmed that the steel plate box 1 has no deformation or cracks; the drill pipe 36 and the rotating shaft 33 of the telescopic assembly 3 rotate flexibly, the threaded steel sleeve 32 and the rotating shaft 33 are smoothly threaded; the rotating wheel 43 of the manual turntable assembly 4 rotates freely, and the positioning bolt 41 can effectively lock the rotating shaft 44; the lifting ring 5 is welded firmly without cracking or deformation; the bearing 9 rotates without abnormality such as jamming; The lifting hook of the hoisting equipment is connected to the support replacing belt device through the lifting ring 5, the device is slowly lifted, the device posture is adjusted, and the steel plate box 1 is kept in a substantially vertical state; The lifting device is lifted to the gap between the foundation pit support pile and the basement outer wall, the device position is accurately adjusted according to the position of the support replacing belt in the construction drawing, it is ensured that the steel plate box 1 is perpendicular to the basement outer wall surface, and the left and right support steel plates 6 correspond to the support design position, after adjustment, the device is slowly lowered to make the device stably fall into position; The rotating wheel 43 of the manual turntable assembly 4 is manually rotated by the construction personnel, the rotating wheel 43 drives the rotating shaft 44 and the vertical rod 7 to rotate, the horizontal conical gear 8 on the vertical rod 7 rotates, the horizontal conical gear 8 drives the meshed vertical conical gear 37 to rotate, and then drives the drill pipe 36, the rotating disc 35, and the rotating shaft 33 to rotate. Since the rotating shaft 33 is threadedly connected with the threaded steel sleeve 32, when the rotating shaft 33 rotates, the threaded steel sleeve 32 moves axially outward along the rotating shaft 33, drives the first steel pipe 31, the steel end plate 38, and the left and right support steel plates 2 and 6 to extend outward; The rotating wheel 43 is continuously rotated, the contact condition of the support steel plate with the foundation pit support pile and the basement outer wall is observed, until the support steel plate is in close contact with the support pile and the basement main structure, and the designed support effect is achieved, then the positioning bolt 41 is tightened, the positioning bolt 41 is threadedly connected with the protective ring 42 along the middle part of the positioning ring 45, the rotating shaft 44 is limited to rotate to lock the support state, and the support replacing operation is completed; After the underground structure construction is completed, the rotating wheel 43 of the manual turntable assembly 4 is reversely rotated, the rotating shaft 33 is reversely rotated, the threaded steel sleeve 32 drives the first steel pipe 31, the steel end plate 38, and the support steel plate to retract towards the steel plate box 1, and the positioning bolt 41 is loosened to release the locking of the rotating shaft 44; The support replacing belt device is lifted and removed by connecting the device through the lifting ring 5 of the hoisting equipment, transported to the designated site, cleaned, inspected, and necessary maintenance, and then transported to other foundation pit projects to repeat the above support replacing operation process to realize the turnover use.

[0035] The above detailed description of the embodiments of the present application is only preferred embodiments of the present application, and should not be considered as limiting the scope of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the patent coverage of the present application.

Claims

1. A detachable and reusable quick-construction support replacement device, characterized in that, It includes a steel plate box body (1), and the two sides of the steel plate box body (1) are respectively provided with a left support steel plate (2) and a right support steel plate (6) connected by a telescopic component (3); The upper middle position of the steel plate box (1) is equipped with a manual turntable assembly (4). The manual turntable assembly (4) is fixedly connected to the top of the vertical rod (7). The vertical rod (7) is vertically inserted and rotatably connected to the steel plate box (1) through the bottom bearing (9). Horizontal bevel gears (8) are fixedly connected to the upper, middle and lower sections of the vertical rod (7). The manual turntable assembly (4) can be manually driven to rotate the vertical rod (7) and the horizontal bevel gear (8), thereby driving the telescopic assembly (3) to extend and retract to achieve rapid adjustment of the two supporting steel plates.

2. The removable and reusable quick-construction support replacement device according to claim 1, characterized in that, The telescopic component (3) includes a second steel pipe (34) welded and fixed to the steel plate box (1), and a drill rod (36) is embedded inside the second steel pipe (34). At the same time, one end of the drill rod (36) near the vertical bevel gear (37) is fixedly connected to the vertical bevel gear (37), and the other end is fixedly connected to a rotating disk (35). The rotating disk (35) is fixedly connected to a rotating shaft (33) on the side away from the drill rod (36), and a threaded steel sleeve (32) is threadedly connected to the outer circumference of the rotating shaft (33). At the same time, a first steel pipe (31) is sleeved and fixedly connected to the outside of the threaded steel sleeve (32), and a steel end plate (38) is fixedly connected to the end of the first steel pipe (31) away from the threaded steel sleeve (32).

3. The removable and reusable quick-construction support replacement device according to claim 1, characterized in that, The manual turntable assembly (4) includes a rotating shaft (44) fixedly connected to the top of the vertical rod (7), and a rotating wheel (43) is sleeved and fixedly connected to the upper part of the rotating shaft (44). A positioning ring (45) is fixedly installed on the outside of the rotating shaft (44). The top of the steel plate box (1) is fixed with a protective ring (42) corresponding to the position of the rotating shaft (44), and the outer circumference of the protective ring (42) is threaded with a positioning bolt (41). At the same time, the end of the positioning bolt (41) can be moved into the protective ring (42) to restrict the rotation of the rotating shaft (44).

4. A detachable and reusable quick-construction support replacement device according to claim 1, characterized in that, The manual turntable assembly (4) drives the rotating shaft (44) and the vertical rod (7) to rotate synchronously by rotating the rotating wheel (43) left and right, thereby driving the horizontal bevel gear (8) fixed to the vertical rod (7) to rotate together with the vertical rod (7).

5. A detachable and reusable quick-construction support replacement device according to claim 1, characterized in that, The horizontal bevel gears (8) of the upper, middle and lower sections of the vertical rod (7) are provided with vertical bevel gears (37) on both the left and right sides. The horizontal bevel gears (8) mesh with the vertical bevel gears (37) in the telescopic assembly (3). When the horizontal bevel gears (8) rotate, they can drive the vertical bevel gears (37) to rotate synchronously.

6. A detachable and reusable quick-construction support replacement device according to claim 1, characterized in that, The outer ring of the bearing (9) at the bottom of the vertical rod (7) is welded and fixed to the inner wall of the bottom of the steel plate box (1), and the inner ring is fixed to the outer periphery of the bottom of the vertical rod (7), so that the vertical rod (7) can rotate stably relative to the steel plate box (1).

7. A detachable and reusable quick-construction support replacement device according to claim 1, characterized in that, The top of the steel plate box (1) is fixed with two lifting rings (5) for hoisting. The two lifting rings (5) are symmetrically welded to the top two ends of the steel plate box (1). The rings (5) face the same direction as the length of the steel plate box (1) and are used to cooperate with the lifting equipment to realize the hoisting and installation of the device.

8. A detachable and reusable quick-construction support replacement device according to claim 1, characterized in that, The steel plate box (1) has three round holes (10) at each of its left and right ends, and the round holes (10) are evenly distributed along the height direction of the steel plate box (1). The round holes (10) correspond one-to-one with the installation position of the telescopic component (3), providing clearance space for the telescopic movement of the telescopic component (3).

9. A detachable and reusable quick-construction support replacement device according to claim 2, characterized in that, The steel end plate (38) is welded and fixed to the inner side of the left support steel plate (2) or the right support steel plate (6) on the side away from the first steel pipe (31), so that the telescopic movement of the telescopic component (3) can directly drive the support steel plate to move synchronously.

10. A rapid construction method for a detachable and reusable replacement support device for foundation pit support, comprising a detachable and reusable rapid construction replacement support device as described in any one of claims 1-9, characterized in that... Includes the following steps: After the foundation pit support and basement exterior wall construction are completed and the concrete strength meets the standards; The device is lifted by lifting equipment using the lifting ring (5) to the gap between the foundation pit support pile and the basement exterior wall, and then installed vertically according to the position of the replacement support belt in the drawing; Rotating the rotating wheel (43) causes the vertical rod (7) to rotate; The vertical rod (7) drives the horizontal bevel gear (8) to rotate, which in turn drives the vertical bevel gear (37) and the connected rotating disk (35) and rotating shaft (33) to rotate. The rotation of the shaft (33) causes the threaded steel sleeve (32) to move the first steel pipe (31), the steel end plate (38) and the supporting steel plate. After the supporting steel plate is in close contact with the support pile and the basement main body, the positioning bolt (41) is tightened to lock it; after the underground structure is completed, the positioning bolt (41) is loosened to allow the support to retract and the device is removed.

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