A multi-point bracing device for a diaphragm wall

Abstract

The present application belongs to the field of continuous wall support, and particularly relates to a multi-point support device for continuous wall, which comprises support plates on the inner walls of the two sides of the continuous wall, a main shaft arranged between the two support plates, three connecting rod mechanisms arranged in sequence from top to bottom in the axial direction of the main shaft, which are respectively a first connecting mechanism, a second connecting rod mechanism and a third connecting rod mechanism; the three connecting rod mechanisms each comprise two connecting rods symmetrically arranged on the two sides of the main shaft, the connecting rods are arranged obliquely, one end of each connecting rod is rotatably connected to the main shaft, and the other end of each connecting rod abuts against the support plate, the connecting rods on the three connecting rod mechanisms are connected to the upper end, the middle part and the lower end of the support plate respectively, and the main shaft is used for vertical movement, so that the connecting rods on the three connecting rod mechanisms push the support plates to extrude the inner walls of the continuous wall, the support plates are extruded on the upper end, the middle part and the lower end by the present application, the force on the support plates is more uniform, and the support of the continuous wall is more stable.

Description

Technical Field

[0001] This invention belongs to the field of continuous wall support, and specifically relates to a multi-point support device for continuous walls. Background Technology

[0002] A diaphragm wall, also known as a diaphragm wall, is a foundation engineering project where a trenching machine excavates a long, narrow trench along the perimeter of a deep excavation project, using slurry wall support. After cleaning the trench, a reinforcing cage is placed inside, and then underwater concrete is poured using the tremie method to form a unit trench segment. This process is repeated segment by segment to build a continuous reinforced concrete wall underground, serving as a water-cutting, seepage-proof, load-bearing, and water-retaining structure. Currently, the internal support system for diaphragm walls often uses a horizontal steel pipe support scheme. This involves using horizontal steel pipes to support the diaphragm wall on both sides of the trench, utilizing the axial force of the horizontal steel pipes to support the diaphragm wall. However, the current horizontal steel pipe support positions are usually located in the middle of the diaphragm wall, failing to provide adequate support at the top and bottom, resulting in a single support point for the current diaphragm wall system. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-point support device for diaphragm walls to solve the problems in the prior art. The technical solution adopted by this invention is as follows:

[0004] A multi-point support device for a diaphragm wall includes support plates located on the inner walls of both sides of the diaphragm wall. A main shaft is disposed between the two support plates. Three linkage mechanisms are arranged sequentially from top to bottom along the axial direction of the main shaft, namely a first connecting mechanism, a second linkage mechanism, and a third linkage mechanism. Each of the three linkage mechanisms includes two connecting rods symmetrically disposed on both sides of the main shaft. The connecting rods are inclined, with one end rotatably connected to the main shaft and the other end abutting against the support plate. The connecting rods on the three linkage mechanisms are respectively connected to the upper end, middle part, and lower end of the support plate. The main shaft is used for vertical movement, thereby causing the connecting rods on the three linkage mechanisms to push the support plate to press against the inner wall of the diaphragm wall.

[0005] Furthermore, it also includes a fourth linkage mechanism with the same structure as the second linkage mechanism. The second linkage mechanism is located above the fourth linkage mechanism. One end of the linkage on the second linkage mechanism is inclined upwards, and the other end of the linkage on the fourth linkage mechanism is inclined downwards. The bottom of the main shaft is threadedly connected to a lower push rod. The lower end of the lower push rod is rotatably connected to the opposite ends of two linkages on the third linkage mechanism. The upper end of the lower push rod is rotatably connected to the opposite ends of two linkages on the fourth linkage mechanism. When the main shaft moves downwards, the linkages on the second linkage mechanism and the first connecting mechanism press against the inner wall of the continuous wall, and the lower push rod moves upwards and pushes the linkages on the third linkage mechanism and the fourth linkage mechanism to press against the inner wall of the continuous wall.

[0006] Furthermore, the upper ends of the main shaft are rotatably connected to the opposite ends of two links on the fourth linkage mechanism, and the lower ends of the main shaft are rotatably connected to the opposite ends of two links on the second linkage mechanism.

[0007] Furthermore, the two connecting rods on the second linkage mechanism are rotatably connected at opposite ends to the two sides of the upper sliding disk, and the upper sliding disk is slidably sleeved on the main shaft; the two connecting rods on the four-bar linkage mechanism are rotatably connected at opposite ends to the two sides of the lower sliding disk, and the lower sliding disk is slidably sleeved on the lower push rod.

[0008] Furthermore, the upper sliding disk and the lower sliding disk are connected by a spring, and the spring compresses the upper and lower sliding disks to move relative to each other.

[0009] Furthermore, an upper fixed ring is fixedly sleeved on the main shaft above the upper sliding disk, and a lower fixed ring is fixedly sleeved on the lower push rod above the lower sliding disk; the bottom of the upper fixed ring is rotatably connected to an upper rotating ring, and the top of the lower fixed ring is rotatably connected to a lower rotating ring; the top of the upper rotating ring is fixedly connected to the telescopic rod, and the bottom of the telescopic rod is fixedly connected to the lower rotating ring; the upper and lower rotating rings are coaxially arranged with the main shaft; multiple telescopic rods are distributed around the main shaft, and the telescopic rods pass through the upper and lower sliding disks; springs are sleeved at both ends of the telescopic rods, and the springs at both ends are distributed between the lower sliding disk and the lower rotating ring, and between the upper sliding disk and the upper rotating ring.

[0010] Furthermore, a screw is fixedly connected to the bottom of the main shaft, and the screw is threadedly connected to a lower push rod.

[0011] Furthermore, positioning strips are fixedly installed on opposite sides of the two support plates, and sliding frames are fastened to the positioning strips. Three through holes are provided on the sliding frames, and pressure blocks are slidably installed in the three through holes in the horizontal direction. The pressure blocks abut against the positioning strips in the through holes. The two uppermost pressure blocks are rotatably connected at opposite ends to the two opposite ends of the two connecting rods on the first connecting mechanism. The two middle pressure blocks are rotatably connected at opposite ends to the two opposite ends of the two connecting rods on the second and fourth connecting mechanisms. The two lowermost pressure blocks are rotatably connected at opposite ends to the two opposite ends of the two connecting rods on the third connecting mechanism.

[0012] Furthermore, a bearing plate is installed on the top of the continuous wall, the top of the main shaft rotatably passes through the bearing plate, a driven wheel is provided on the top of the main shaft, the driven wheel constrains the circumference of the main shaft and is slidably sleeved on the main shaft, the driven wheel is connected to the driving wheel, and the driving wheel is connected to the output end of the motor; the motor is detachably mounted on the bracket, and the bracket is fixedly connected to the bearing plate.

[0013] The present invention has the following beneficial effects: when the main shaft moves vertically downward, the connecting rods on the first, second and third linkage mechanisms rotate accordingly, generating a thrust that pushes the support plate outward, firmly pressing the support plate against the continuous wall, thereby achieving the purpose of support. The present invention can make the support plate more evenly stressed and provide more stable support for the continuous wall by squeezing and supporting the upper, middle and lower ends of the support plate. The present invention adopts a non-fixed structure, which can be used multiple times and is more green and environmentally friendly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a partially enlarged schematic diagram of the second and third linkage mechanisms;

[0016] Figure 3 Schematic diagram of the connection relationship between the master and driven wheels;

[0017] Figure 4 This is a top view of the positioning bar. Detailed Implementation

[0018] The following will be based on embodiments of the present invention. Figures 1-4 The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0019] like Figure 1 A multi-point support device for a diaphragm wall includes support plates 2 located on the inner walls of both sides of the diaphragm wall 1. A main shaft 12 is arranged between the two support plates 2. Three linkage mechanisms are arranged sequentially from top to bottom along the axial direction of the main shaft 12, namely a first connecting mechanism 5, a second linkage mechanism 6, and a third linkage mechanism 8. Each of the three linkage mechanisms includes two connecting rods symmetrically arranged on both sides of the main shaft 12. The connecting rods are inclined, with one end of the connecting rod rotatably connected to the main shaft 12 and the other end abutting against the support plate 2. The connecting rods on the three linkage mechanisms are respectively connected to the upper end, middle part, and lower end of the support plate 2. The main shaft 12 is used for vertical movement, thereby causing the connecting rods on the three linkage mechanisms to push the support plate 2 to press against the inner wall of the diaphragm wall 1.

[0020] The diaphragm wall 1 is existing technology. A groove is formed between two diaphragm walls 1. The support device of the present invention is set in the groove. Two support plates 2 are vertically set and attached to the opposite side of the two diaphragm walls 1. The main shaft 12 is vertically set.

[0021] In specific implementation, when the main shaft 12 moves vertically downward, the connecting rods on the first, second and third linkage mechanisms rotate accordingly, generating a thrust that pushes the support plate 2 outward, firmly pressing the support plate 2 onto the continuous wall 1, thereby achieving the purpose of support. By compressing and supporting the upper, middle and lower ends of the support plate 2, this invention can make the support plate 2 more evenly stressed and provide more stable support for the continuous wall 1.

[0022] like Figure 1 , Figure 2 The specific structure of the linkage mechanism is described below:

[0023] Furthermore, it also includes a fourth linkage mechanism 7 with the same structure as the second linkage mechanism 6. The second linkage mechanism 6 is located above the fourth linkage mechanism 7. One end of the connecting rod on the second linkage mechanism 6 is inclined upwards to the main shaft 12, and one end of the connecting rod on the fourth linkage mechanism 7 is inclined downwards to the main shaft 12. The bottom of the main shaft 12 is threadedly connected to a lower push rod 14. The lower ends of the lower push rod 14 are rotatably connected to the opposite ends of two connecting rods on the third linkage mechanism 8, and the upper ends of the lower push rod 14 are rotatably connected to the opposite ends of two connecting rods on the fourth linkage mechanism 7. When the main shaft 12 moves downwards, the connecting rods on the second linkage mechanism 6 and the first connecting mechanism 5 press against the inner wall of the continuous wall 1, and the lower push rod 14 moves upwards and pushes the connecting rods on the third linkage mechanism 8 and the fourth linkage mechanism 7 to press against the inner wall of the continuous wall 1.

[0024] Specifically, the second and fourth linkage mechanisms have the same structure and are symmetrically arranged, as do the first and third linkage mechanisms; the two connecting rods on the first connecting mechanism 5 have opposite ends, i.e., the ends connected to the main shaft 12, that are inclined upwards; the two connecting rods on the third linkage mechanism 8 have opposite ends, i.e., the ends connected to the main shaft 12, that are inclined downwards; and the connecting rods on the first and second linkage mechanisms have the same inclination angle, as do the connecting rods on the third and fourth linkage mechanisms.

[0025] When the main shaft 12 moves downward, the lower push rod 14 moves upward. At this time, the main shaft 12 causes the connecting rods on the first and second linkage mechanisms to deflect downward, thereby generating a pushing force on the support plate 2. The lower push rod 14 causes the connecting rods on the third and fourth linkage mechanisms to deflect upward, thereby generating a pushing force on the support plate 2. When the main shaft 12 moves upward, the lower push rod 14 moves downward, at which point the pressure on the support plate 2 is released, and the device is unlocked.

[0026] Furthermore, the upper ends of the main shaft 12 are rotatably connected to the opposite ends of two links on the fourth linkage mechanism 7, and the lower ends of the main shaft 12 are rotatably connected to the opposite ends of two links on the second linkage mechanism 6. The first, second, third and fourth linkage mechanisms are distributed sequentially from top to bottom.

[0027] Furthermore, the two connecting rods on the second linkage mechanism 6 are rotatably connected at opposite ends to the two sides of the upper sliding disk 601, and the upper sliding disk 601 is slidably sleeved on the main shaft 12; the two connecting rods on the four-bar linkage 7 are rotatably connected at opposite ends to the two sides of the lower sliding disk 701, and the lower sliding disk 701 is slidably sleeved on the lower push rod 14.

[0028] Furthermore, the upper sliding disk 601 and the lower sliding disk 701 are connected by a spring 102, and the spring 102 compresses the upper and lower sliding disks to move relative to each other.

[0029] Furthermore, an upper fixing ring 121 is fixedly sleeved on the main shaft 12 above the upper sliding disk 601, and a lower fixing ring 141 is fixedly sleeved on the lower push rod 14 above the lower sliding disk 701. The bottom of the upper fixing ring 121 is rotatably connected to an upper rotating ring 101, and the top of the lower fixing ring 141 is rotatably connected to a lower rotating ring 111. The upper rotating ring 101 is fixedly connected to the top of the telescopic rod 10, and the bottom of the telescopic rod 10 is fixedly connected to the lower rotating ring 111. The upper and lower rotating rings are coaxially arranged with the main shaft 12. Multiple telescopic rods 10 are distributed around the main shaft 12, and the telescopic rods 10 pass through the upper and lower sliding disks. Springs 102 are sleeved on both ends of the telescopic rods 10, and the springs 102 at both ends are distributed between the lower sliding disk 701 and the lower rotating ring 111, and between the upper sliding disk 601 and the upper rotating ring 101.

[0030] Specifically, the upper sliding disk 601, the lower sliding disk 701, the upper rotating ring 101, the lower rotating ring 111, the upper fixed ring 121, and the lower fixed ring 141 are coaxially arranged and coaxially arranged with the main shaft 12. Annular grooves are provided at the bottom of the upper fixed ring 121 and the top of the lower fixed ring 141, and the upper rotating ring 101 and the lower rotating ring 111 are rotatably connected in the annular grooves of the two rings, respectively.

[0031] When the main shaft 12 and the lower push rod 14 move relative to each other, the upper fixed ring 121 presses the upper end of the spring 102 downward, thereby causing the spring 102 to exert downward pressure on the upper sliding disk 601, forcing the connecting rod on the second linkage mechanism 6 to press the support plate 2; at this time, the lower rotating ring 111 presses the lower end of the spring 102 upward, thereby causing the spring 102 to exert upward pressure on the lower sliding disk 701, forcing the connecting rod on the fourth linkage mechanism 7 to press the support plate 2.

[0032] That is to say, in the present invention, the second link mechanism 6 and the fourth link mechanism 7 support and press the support plate 2 by the elastic force of the spring 102, while the first and third link mechanisms are in a rigid abutting manner. The advantage of such a design is that the links on the first and third link mechanisms can fully support the support plate 2. If the second and fourth link mechanisms also adopt the rigid abutting manner, then in the case of length errors in the four link mechanisms, it is easy to cause the link on one of the link mechanisms to have fully abutted against the support plate 2, while there is still a gap between the other links and the support plate 2. In the present invention, the second and fourth link mechanisms in the middle position adopt elastic support to avoid affecting the upper and lower ends of the support plate 2 where the first and third link mechanisms cannot be tightly abutted, so as to make the overall support structure more stable and uniform.

[0033] Furthermore, a screw rod 13 is fixedly connected to the bottom of the main shaft 12. The screw rod 13 is threadedly connected to the lower push rod 14. The main shaft 12, the screw rod 13 and the lower push rod 14 are coaxially distributed.

[0034] Such as Figure 1 、 Figure 4 , the following describes the specific connection structure of the support plate 2;

[0035] Furthermore, positioning strips 3 are respectively fixedly arranged on the opposite sides of the two support plates 2. A sliding frame 4 is buckled on the positioning strip 3. Three through holes are provided on the sliding frame 4. Three pressure blocks 9 are respectively slidably arranged in the three through holes, and the sliding direction is the horizontal direction. The pressure blocks 9 abut against the positioning strip 3 in the through holes; the opposite ends of the two pressure blocks 9 at the uppermost position are respectively rotatably connected to the opposite ends of the two links on the first connection mechanism 5. The opposite ends of the two pressure blocks 9 in the middle are respectively rotatably connected to the opposite ends of the two links on the second and fourth link mechanisms. The opposite ends of the two pressure blocks 9 at the lowermost position are respectively rotatably connected to the opposite ends of the two links on the third link mechanism 8.

[0036] Specifically, in the length direction of the diaphragm wall 1, a plurality of equally spaced positioning strips 3 are set. The purpose of the two positioning strips 3 is to position and install the sliding frame 4. A plurality of the four link mechanisms can be arranged in the length direction of the diaphragm wall 1, and a plurality of the positioning strips 3 can be selected for positioning.

[0037] The sliding frame 4 has a "C" - shaped structure, and its opening is buckled on the positioning strip 3. The length of its through hole is adapted to the pressure block 9. The through hole restricts the sliding direction of the pressure block 9, making it only able to slide horizontally and unable to move up and down, thereby restricting the up - and - down movement of the end of the link, enabling the end of the link connected to the main shaft 12 to move up and down, so as to achieve the purpose of squeezing the pressure block 9 and then achieving the purpose of tightly abutting against the support plate 2 through the pressure block 9.

[0038] Each of the four linkage mechanisms has a pressure block 9 at both ends. In the vertical direction, three pressure blocks 9 are distributed on the positioning strip 3, corresponding to the upper, middle and lower positions of the support plate 2.

[0039] In addition, an elastic part can be fixedly provided at the end of the pressure block 9, and the pressure block 9 presses the support plate 2 through the elastic part.

[0040] like Figure 1 , Figure 3 The specific connection structure of the bearing plate 15 is described below;

[0041] A bearing plate 15 is installed on the top of the continuous wall 1. The top of the main shaft 12 rotatably passes through the bearing plate 15. A driven wheel 16 is provided on the top of the main shaft 12. The driven wheel 16 constrains the circumference of the main shaft 12 and is slidably sleeved on the main shaft 12. The driven wheel 16 is connected to the driving wheel 17, and the driving wheel 17 is connected to the output end of the motor 11. The motor 11 is detachably mounted on the bracket 18, and the bracket 18 is fixedly connected to the bearing plate 15.

[0042] The support plate 15 can be installed on the top of the two continuous walls 1 using expansion bolts, nail heads, and other components. The driven wheel 16 is sleeved and connected to the rotating seat 161, which is rotatably connected to the support plate 15. The rotating seat 161 has a hollow structure, and the top of the main shaft 12 passes through its hollow portion. The main shaft 12 and the rotating seat 161 can be connected by a sliding key, or a protrusion can be provided on the inner side of the rotating seat 161, and a groove can be provided on the outer circumferential surface of the main shaft 12. The protrusion is located in the groove, and the torque is transmitted through the protrusion and the groove. The main shaft 12 can move up and down. The driven wheel 16 rotates but its height remains unchanged. The driven wheel 16 and the driving wheel 17 can be connected by a belt. The driving wheel 17 is sleeved and connected to the connecting seat 171. The connecting seat 171 is rotatably connected to the top of the support plate 15. A blind hole is provided on the top of the connecting seat 171. The output end of the motor 11 is inserted into the blind hole and connected to the connecting seat 171 by spline and gear engagement. The torque of the motor 11 is transmitted to the connecting seat 171, causing the driving wheel 17 to rotate. The motor 11 and the bracket 18 can be connected by screws.

[0043] In practice, the main shaft 12 rotates when the motor 11 rotates, and the main shaft 12 rotates accordingly. Through the cooperation between its threaded part and the lower push rod 14, the main shaft 12 and the lower push rod 14 can move relative to each other. When the motor 11 changes direction, the main shaft 12 and the lower push rod 14 can move in opposite directions. When they move in opposite directions, the pressure blocks 9 on both sides move relative to each other toward the middle, thereby unlocking the support plates 2 on both sides.

[0044] During recycling, the present invention first unlocks the pressure block 9 from the support plate 2 by rotating the motor 11, and then the support plate 2 loses its supporting force. After that, the support device of the present invention is removed by lifting the top of the main shaft 12 and the top of the bearing plate 15 to complete the recycling. The present invention adopts a non-fixed structure, which can be used multiple times and is more green and environmentally friendly.

[0045] In addition, the motor 11 can be removed after the linkage mechanism is in place. Multiple support devices of the present invention are arranged along the length of the continuous wall 1, and can share one motor 11. The linkage mechanism on each support device is pressed against the support plate 2 in sequence, and unlocked in sequence when it is retracted.

[0046] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, substitutions, or variations made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A multi-point support device for diaphragm walls, characterized in that: Includes support plates (2) located on the inner walls of both sides of the continuous wall (1), and a main shaft (12) is provided between the two support plates (2). Three linkage mechanisms are arranged from top to bottom in the axial direction of the main shaft (12), namely the first connecting mechanism (5), the second linkage mechanism (6) and the third linkage mechanism (8). The three linkage mechanisms each include two connecting rods symmetrically arranged on both sides of the main shaft (12). The connecting rods are inclined and one end of the connecting rod is rotatably connected to the main shaft (12), while the other end abuts against the support plate (2). The connecting rods on the three linkage mechanisms are respectively connected to the upper end, middle part and lower end of the support plate (2). The main shaft (12) is used for vertical movement, so that the connecting rods on the three linkage mechanisms push the support plate (2) to squeeze the inner wall of the continuous wall (1). It also includes a fourth linkage mechanism (7) with the same structure as the second linkage mechanism (6). The second linkage mechanism (6) is located above the fourth linkage mechanism (7). One end of the connecting rod of the second linkage mechanism (6) is inclined upward, and one end of the connecting rod of the fourth linkage mechanism (7) is inclined downward. The bottom of the main shaft (12) is threadedly connected to the lower push rod (14). The lower end of the lower push rod (14) is rotatably connected to the opposite ends of two links on the third linkage mechanism (8). The upper end of the lower push rod (14) is rotatably connected to the opposite ends of two links on the fourth linkage mechanism (7). When the main shaft (12) moves downward, the connecting rods on the second linkage mechanism (6) and the first connecting mechanism (5) press against the inner wall of the continuous wall (1), and the lower push rod (14) moves upward and pushes the connecting rods on the third linkage mechanism (8) and the fourth linkage mechanism (7) to press against the inner wall of the continuous wall (1). Positioning strips (3) are fixedly provided on opposite sides of the two support plates (2). A sliding frame (4) is fastened on the positioning strip (3). Three through holes are provided on the sliding frame (4). A pressure block (9) is slidably provided in each of the three through holes. The sliding direction is horizontal. The pressure block (9) abuts against the positioning strip (3) in the through hole. The two uppermost pressure blocks (9) are rotatably connected at opposite ends to the two opposite ends of the two connecting rods on the first connecting mechanism (5). The two middle pressure blocks (9) are rotatably connected at opposite ends to the two opposite ends of the two connecting rods on the second and fourth linkage mechanisms. The two lowermost pressure blocks (9) are rotatably connected at opposite ends to the two opposite ends of the two connecting rods on the third linkage mechanism (8).

2. A multi-point support device for diaphragm walls according to claim 1, characterized in that: The upper ends of the main shaft (12) are rotatably connected to the opposite ends of two links on the fourth linkage mechanism (7), and the lower ends of the main shaft (12) are rotatably connected to the opposite ends of two links on the second linkage mechanism (6).

3. A multi-point support device for diaphragm walls according to claim 1, characterized in that: The two connecting rods on the second linkage mechanism (6) are rotatably connected at opposite ends to the two sides of the upper sliding disk (601), and the upper sliding disk (601) is slidably sleeved on the main shaft (12); the two connecting rods on the four-bar linkage mechanism (7) are rotatably connected at opposite ends to the two sides of the lower sliding disk (701), and the lower sliding disk (701) is slidably sleeved on the lower push rod (14).

4. A multi-point support device for diaphragm walls according to claim 3, characterized in that: The upper sliding disk (601) and the lower sliding disk (701) are connected by a spring (102), and the spring (102) compresses the upper and lower sliding disks to move relative to each other.

5. A multi-point support device for diaphragm walls according to claim 4, characterized in that: An upper fixing ring (121) is fixedly sleeved on the main shaft (12) above the upper sliding disk (601), and a lower fixing ring (141) is fixedly sleeved on the lower push rod (14) above the lower sliding disk (701). The upper fixed ring (121) is rotatably connected to the upper rotating ring (101) at its bottom, and the lower fixed ring (141) is rotatably connected to the lower rotating ring (111) at its top. The upper rotating ring (101) is fixedly connected to the top of the telescopic rod (10), and the bottom of the telescopic rod (10) is fixedly connected to the lower rotating ring (111). The upper and lower rotating rings are coaxially arranged with the main shaft (12). Multiple telescopic rods (10) are distributed around the main shaft (12). The telescopic rods (10) pass through the upper and lower sliding discs. Both ends of the telescopic rod (10) are fitted with springs (102), and the springs (102) at both ends are distributed between the lower sliding plate (701) and the lower rotating ring (111), and between the upper sliding plate (601) and the upper rotating ring (101).

6. A multi-point support device for diaphragm walls according to claim 1, characterized in that: The bottom of the main shaft (12) is fixedly connected to a screw (13), and the screw (13) is threadedly connected to a push rod (14).

7. A multi-point support device for diaphragm walls according to claim 1, characterized in that: The top of the continuous wall (1) is equipped with a bearing plate (15), the top of the main shaft (12) can rotatably pass through the bearing plate (15), the top of the main shaft (12) is provided with a driven wheel (16), the driven wheel (16) constrains the circumference of the main shaft (12) and is slidably sleeved on the main shaft (12), the driven wheel (16) is connected to the driving wheel (17), and the driving wheel (17) is connected to the output end of the motor (11); The motor (11) is detachably mounted on the bracket (18), which is fixedly connected to the support plate (15).

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