A square tube diagonal bracing device for foundation pit construction and a concrete support servo combination system

Abstract

The present invention discloses a square tube diagonal brace device and a concrete support servo combination system for foundation pit construction, and specifically relates to the field of foundation pit support. The square tube diagonal brace device includes a support connection assembly, a jack is installed at one end of the support connection assembly, a pressure component is installed at the output end of the jack, and the jack is used to drive the pressure component to press against the side wall of the concrete enclosure structure. The present invention sets a jack, a correction frame, a guide assembly and a positioning plate. When the pressure component removes the axial force on the concrete enclosure structure, the positioning plate corrects the position of the ball head, thereby correcting the axis of the support connection assembly, so that the axis of the support connection assembly coincides with the axis of the positioning plate again, and then the jack drives the pressure component to apply the axial force to the concrete enclosure structure again, thereby ensuring that the magnitude of the axial force is within the specified range and ensuring the effect of resisting the deformation of the foundation pit.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit support, and more specifically, to a square tube diagonal bracing device for foundation pit construction and a concrete support servo combination system. Background Art

[0002] With the needs of urban development, more and more deep foundation pits are being constructed close to subway operating lines. The deformation of the foundation pit retaining structure directly affects the surrounding surface settlement and building displacement. Therefore, such engineering projects have very strict requirements on the control of foundation pit deformation.

[0003] In the past, foundation pit support was made of reinforced concrete support or steel structure support. The concrete support system is constructed after the foundation pit is excavated, and can only play a certain control role in the subsequent excavation deformation, and cannot actively adjust and control the deformation that has occurred in the previous excavation; steel supports are mostly locked with wedge blocks, which easily cause the problem of support axial force relaxation in actual application. Therefore, the current mainstream use of concrete support servo combination system, that is, combining reinforced concrete support and steel structure support, which mainly includes concrete retaining structure and steel structure support supported between concrete retaining structure. The steel structure support includes support connectors and jacks installed at one end of the support connectors. The two ends of the steel structure support are pressed together with the top of the purlin of the concrete retaining structure, and the axial force is compensated by the jack, thereby reducing the deformation of the foundation pit retaining structure.

[0004] In the process of controlling the deformation of the foundation pit, the pit bottom bulge, pit dewatering and other effects will cause the foundation pit retaining structure to settle, which will make the support points at both ends of the steel structure support not on the same horizontal plane, that is, one end is slightly tilted, causing the direction of the support axial force to change, reducing the positive pressure of the jack on the concrete retaining structure, thereby reducing the control effect of the foundation pit deformation. Summary of the invention

[0005] The present invention provides a square tube diagonal brace device and a concrete support servo combination system for foundation pit construction, and aims to solve the technical problem that the settlement of the foundation pit retaining structure will cause the direction of the supporting axial force to change, thereby reducing the positive pressure of the jack on the concrete retaining structure, thereby reducing the control effect of the foundation pit deformation.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a square tube diagonal bracing device for foundation pit construction, comprising a support connection assembly, a jack is installed at one end of the support connection assembly, a pressure component is installed at the output end of the jack, the jack is used to drive the pressure component to press against the side wall of the concrete enclosure structure, when installed, the other end of the support connection assembly is fixed on the side wall of the concrete enclosure structure, so that the two ends of the support connection assembly apply axial force to the concrete enclosure structures on both sides; a correction frame is installed at one end of the support connection assembly close to the jack, and the circumferential direction of the correction frame A plurality of guiding components are provided, and a positioning pressure plate is provided at the front end of the correction frame. An annular groove is provided on the side wall of the positioning pressure plate close to the guiding component. A plurality of elastic telescopic parts are installed circumferentially of the positioning pressure plate. The elastic telescopic parts are used to keep the positioning pressure plate on the concrete retaining structure connected to the other end of the supporting connection component. The guiding component and the pressure component have opposite movement directions. When the pressure component applies an axial force to the concrete retaining structure, the positioning pressure plate is separated from the concrete retaining structure. When the pressure component removes the axial force from the concrete retaining structure, the guiding component is pressed against the inside of the annular groove.

[0007] In a preferred embodiment, when the axis of the supporting connection assembly is on a horizontal plane, the axis of the positioning plate coincides with the axis of the supporting connection assembly.

[0008] In a preferred embodiment, the guiding assembly includes a guiding cylinder, which is movably arranged on the correction frame, and a guiding rod is movably inserted into one end of the guiding cylinder close to the positioning pressure plate, and an elastic component 2 is arranged inside the guiding cylinder, and the elastic component 2 is used to reset the guiding rod toward the direction of the positioning pressure plate. The moving direction of the guiding cylinder and the guiding rod is parallel to the axial direction of the supporting connection assembly.

[0009] In a preferred embodiment, the end of the guide rod close to the positioning pressure plate has a ball head, and when the ball head is pressed against the inside of the annular groove, the outer surface of the ball head fits with the inner surface of the annular groove.

[0010] In a preferred embodiment, the pressure-applying component includes a fixed cylinder, which is fixedly mounted at the output end of the jack, and a pressure seat is movably connected to the end of the fixed cylinder away from the jack. An elastic component 1 is arranged inside the fixed cylinder, and the elastic component 1 is used to reset the pressure seat toward the direction of the concrete retaining structure.

[0011] In a preferred embodiment, a transmission assembly is arranged between the pressure-applying component and each guide assembly, and the transmission assembly includes a connecting rod and a fixed shaft. The fixed shaft is fixedly installed on the correction frame. One end of the connecting rod is hinged to the outer wall of the fixed cylinder, and the other end and the middle part of the connecting rod are respectively provided with straight groove one and straight groove two. Straight groove two is movably sleeved on the outside of the fixed shaft. A connecting shaft is arranged on the outer wall of the guide cylinder, and a straight groove one is arranged on the outside of the connecting shaft.

[0012] In a preferred embodiment, a support assembly corresponding to the guide assembly one-to-one is provided on the correction frame, and the support assembly includes a movable cylinder movably inserted on the correction frame, and an insertion rod is movably inserted at one end of the movable cylinder close to the positioning pressure plate, and an elastic component three is provided inside the movable cylinder, and the elastic component three is used to reset the insertion rod toward the direction of the positioning pressure plate. Support holes corresponding to the insertion rod are provided on the positioning pressure plate, and when the axis of the support connection assembly is on a horizontal plane, the axis of the insertion rod coincides with the axis of the support hole.

[0013] In a preferred embodiment, the elastic telescopic member includes a fixed rod and a movable rod arranged opposite each other at the ends, an elastic component four is connected between the fixed rod and the movable rod, one end of the movable rod is fixedly connected to the positioning pressure plate, and the end of the fixed rod away from the positioning pressure plate is connected to a retaining seat, and the retaining seat is used to be fixed on the concrete retaining structure.

[0014] In a preferred embodiment, the supporting connection assembly includes a middle connection member and a left connection member and a right connection member respectively installed at both ends of the middle connection member, the jack is installed on the left connection member, and the right connection member includes a connection member body, a mounting seat and a plurality of square tubes. The connection member body is fixed to the end of the middle connection member, and the connection member body and the mounting seat are connected through a square tube. The mounting seat is used to be fixed on the concrete retaining structure.

[0015] The present invention also provides a concrete support servo combination system, including the above-mentioned square tube diagonal bracing device, and also including a concrete retaining structure, one end of the support connection assembly and the elastic telescopic member are fixedly installed on the concrete retaining structure, and the jack at the other end of the support connection assembly drives the pressure-applying component to press on the concrete retaining structure, so that the two ends of the support connection assembly apply axial force to the concrete retaining structures on both sides.

[0016] The technical effects and advantages of the present invention are as follows: the present invention arranges a jack, a correction frame, a guide assembly and a positioning pressure plate. When the pressure component removes the axial force on the concrete retaining structure, the positioning pressure plate corrects the position of the ball head, thereby correcting the axis of the supporting connection component, so that the axis of the supporting connection component coincides with the axis of the positioning pressure plate again, and then the jack drives the pressure component to apply axial force to the concrete retaining structure again, thereby ensuring that the magnitude of the axial force is within a specified range and ensuring the effect of resisting foundation pit deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall schematic diagram of the square tube diagonal bracing device of the present invention.

[0018] Figure 2 A partial schematic diagram of the square tube diagonal bracing device of the present invention Figure 1 .

[0019] Figure 3 For the present invention Figure 1Side view of.

[0020] Figure 4 For the present invention Figure 3 Cross-sectional view at AA in the middle.

[0021] Figure 5 For the present invention Figure 4 A magnified view of the local structure at point B in the middle.

[0022] Figure 6 A partial schematic diagram of the pipe diagonal bracing device of the present invention Figure 2 .

[0023] Figure 7 It is a structural schematic diagram of the right connecting piece of the present invention.

[0024] Figure 8 It is a schematic diagram of the concrete support servo combination system of the present invention.

[0025] The accompanying drawings are marked as follows: 1. Support connection assembly; 11. Left connection piece; 12. Middle connection piece; 13. Right connection piece; 131. Connection piece body; 132. Square tube; 133. Mounting seat; 2. Jack; 21. Pressure component; 211. Fixing cylinder; 212. Pressure seat; 213. Elastic component 1; 3. Correction frame; 4. Guide assembly; 41. Guide cylinder; 411. Fork; 42. Guide rod; 421. Ball head ; 43. Elastic component two; 5. Positioning pressure plate; 51. Ring groove; 52. Support hole; 6. Transmission assembly; 61. Connecting rod; 611. Straight groove one; 612. Straight groove two; 62. Fixed shaft; 7. Support assembly; 71. Movable cylinder; 72. Insert rod; 73. Elastic component three; 8. Elastic telescopic member; 81. Fixed rod; 82. Movable rod; 83. Elastic component four; 9. Retaining seat; 100. Concrete enclosure structure. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Refer to the instruction manual Figure 1-Figure 8A square tube diagonal bracing device for foundation pit construction includes a support connection component 1, a jack 2 is installed at one end of the support connection component 1, a pressure component 21 is installed at the output end of the jack 2, and the jack 2 is used to drive the pressure component 21 to press on the side wall of the concrete enclosure structure 100. During installation, the other end of the support connection component 1 is fixed on the side wall of the concrete enclosure structure 100, so that the two ends of the support connection component 1 apply axial force to the concrete enclosure structure 100 on both sides; a correction frame 3 is installed at one end of the support connection component 1 close to the jack 2, and a plurality of guide components 4 are arranged in the circumferential direction of the correction frame 3. 3 is provided with a positioning platen 5 at the front end, and a ring groove 51 is provided on the side wall of the positioning platen 5 close to the guide component 4. A plurality of elastic telescopic members 8 are installed circumferentially of the positioning platen 5, and the elastic telescopic members 8 are used to keep the positioning platen 5 on the concrete enclosure structure 100 connected to the other end of the supporting connection component 1, and the guide component 4 moves in opposite directions to the pressure component 21; when the pressure component 21 applies an axial force to the concrete enclosure structure 100, the positioning platen 5 is separated from the concrete enclosure structure 100, and when the pressure component 21 removes the axial force from the concrete enclosure structure 100, the guide component 4 presses against the inside of the ring groove 51.

[0028] In the above technical solution, if Figure 4 and Figure 5 As shown, specifically, the pressure component 21 includes a fixed cylinder 211, which is fixedly installed at the output end of the jack 2, and a pressure seat 212 is movably inserted at one end of the fixed cylinder 211 away from the jack 2. An elastic component 213 is arranged inside the fixed cylinder 211, and the elastic component 213 is used to reset the pressure seat 212 toward the direction of the concrete enclosure structure 100.

[0029] It should be noted that, by driving the fixing cylinder 211 to move, the pressure seat 212 can be pressed on the concrete enclosure structure 100. When the fixing cylinder 211 is further driven to move, the elastic component 1 213 is compressed, and the axial force applied by the pressure seat 212 on the concrete enclosure structure 100 increases. Among them, the elastic component 1 213 is a compression spring.

[0030] In the above technical solution, if Figure 1 As shown, three elastic telescopic parts 8 are provided, specifically, the elastic telescopic parts 8 include a fixed rod 81 and a movable rod 82 which are arranged opposite to each other at the ends, an elastic part 83 is connected between the fixed rod 81 and the movable rod 82, one end of the movable rod 82 is fixedly connected to the positioning pressure plate 5, and the end of the fixed rod 81 away from the positioning pressure plate 5 is connected to a retaining seat 9, and the retaining seat 9 is used to be fixed on the concrete enclosure structure 100.

[0031] It should be noted that the elastic component 483 is sleeved on the outside of the fixed rod 81, and the end of the movable rod 82 is slidably set on the fixed rod 81 through a frame. The two ends of the elastic component 483 are pressed together with the fixed rod 81 and the frame, so that the elastic component 483 can reset the movable rod 82 in the direction of the fixed rod 81, wherein the elastic component 483 is a compression spring. During installation, the retaining seat 9 is installed on the concrete enclosure structure 100, so as to retain the positioning plate 5 on the side of the concrete enclosure structure 100 where the retaining seat 9 is installed. The diameters of the fixed rod 81 and the movable rod 82 can be reasonably selected according to the distance requirements of the two sides of the concrete enclosure structure 100 to ensure sufficient rigidity so that the positioning plate 5 is not easy to shake.

[0032] In the above technical solution, if Figure 4 and Figure 5 As shown, three guide assemblies 4 are provided, specifically, the guide assembly 4 includes a guide cylinder 41, the guide cylinder 41 is movably arranged on the correction frame 3, a guide rod 42 is movably inserted into one end of the guide cylinder 41 close to the positioning pressure plate 5, an elastic component 43 is arranged inside the guide cylinder 41, the elastic component 43 is used to reset the guide rod 42 toward the positioning pressure plate 5, the moving direction of the guide cylinder 41 and the guide rod 42 is parallel to the axial direction of the supporting connection assembly 1, wherein the elastic component 43 is a compression spring.

[0033] Furthermore, when the axis of the supporting connection component 1 is on a horizontal plane, the axis of the positioning plate 5 coincides with the axis of the supporting connection component 1. When the axis of the supporting connection component 1 is on a horizontal plane, it is in a normal state. In this state, the end of the supporting connection component 1 is not deflected.

[0034] Furthermore, one end of the guide rod 42 close to the positioning plate 5 has a ball head 421 . When the ball head 421 is pressed against the inside of the annular groove 51 , the outer surface of the ball head 421 fits with the inner surface of the annular groove 51 .

[0035] Furthermore, a transmission assembly 6 is arranged between the pressure-applying component 21 and each guide assembly 4, and the transmission assembly 6 includes a connecting rod 61 and a fixed shaft 62. The fixed shaft 62 is fixedly installed on the correction frame 3. One end of the connecting rod 61 is hinged to the outer wall of the fixed cylinder 211, and the other end and the middle part of the connecting rod 61 are respectively provided with a straight groove 1 611 and a straight groove 2 612. The straight groove 2 612 is movably sleeved on the outside of the fixed shaft 62. A connecting shaft is arranged on the outer wall of the guide cylinder 41, and the straight groove 1 611 is sleeved on the outside of the connecting shaft.

[0036] It should be noted that if Figure 5As shown, when the jack 2 drives the pressure component 21 to press on the concrete retaining structure 100, the fixed cylinder 211 drives the connecting rod 61 to swing, the fixed shaft 62 slides inside the straight groove 612 relative to the straight groove 612, the connecting shaft slides inside the straight groove 611 relative to the straight groove 611, and the upper end of the connecting rod 61 drives the guiding cylinder 41 to move away from the positioning pressure plate 5, so that the moving directions of the pressure component 21 and the guiding assembly 4 are opposite. When the jack 2 drives the pressure component 21 away from the concrete retaining structure 100, the guiding assembly 4 moves toward the positioning pressure plate 5.

[0037] In this embodiment, the implementation method is as follows: during use, the device is first installed, such as Figure 8 As shown, one end of the support connection assembly 1 and the retaining seat 9 are installed on the concrete retaining structure 100, and then the pressure component 21 is driven by the jack 2 to press the pressure seat 212 on the concrete retaining structure 100, thereby achieving the purpose of foundation pit support. If during the support process, the foundation pit retaining structure settles due to various reasons such as pit bottom uplift, foundation pit precipitation, etc., the end of the support connection assembly 1 installed on the concrete retaining structure 100 will be deflected based on the end of the support connection assembly 1 installed on the concrete retaining structure 100. The direction of deflection varies depending on the settlement situation. In the deflected state, the axis of the positioning pressure plate 5 does not coincide with the axis of the support connection assembly 1. At this time, the force applied by the jack 2 has a component in the vertical direction, causing the axial force (positive pressure) of the jack 2 on the concrete retaining structure 100 to decrease, reducing the control effect on the deformation of the foundation pit. In order to avoid this problem, the position can be corrected at intervals of a period of time T. During correction, such as Figure 4 and Figure 8 As shown, the pressure component 21 is driven away from the concrete retaining structure 100 by the jack 2, so that the axial force of the pressure seat 212 on the concrete retaining structure 100 is reduced. During this process, the fixed cylinder 211 drives the guiding component 4 to move toward the positioning pressure plate 5 through the connecting rod 61, so that the ball head 421 enters the interior of the annular groove 51 and fits with the inner wall of the annular groove 51. Since the axis of the positioning pressure plate 5 coincides with the axis of the supporting connection component 1 when there is no normal deviation, when the three ball heads 421 enter the annular groove 51 and are pressed, the annular groove 51 can guide the three ball heads 421, that is, the axis of the supporting connection component 1 is re-aligned with the axis of the positioning pressure plate 5, and then the pressure component 21 is driven to move toward the concrete retaining structure 100 by the jack 2, so that the pressure seat 212 re-applies axial force to the concrete retaining structure 100, so that the posture of the supporting connection component 1 is corrected.

[0038] It should be noted that, in the foundation pit, this device is installed in many places, and the correction can be controlled in sequence, and the situation of simultaneous correction should be avoided.

[0039] The above technical solution is provided with a jack 2, a correction frame 3, a guide assembly 4 and a positioning pressure plate 5. When the pressure component 21 removes the axial force on the concrete retaining structure 100, the positioning pressure plate 5 corrects the position of the ball head 421, thereby correcting the axis of the supporting connection component 1, so that the axis of the supporting connection component 1 is re-aligned with the axis of the positioning pressure plate 5, and then the jack 2 drives the pressure component 21 to apply the axial force to the concrete retaining structure 100 again, thereby ensuring that the magnitude of the axial force is within the specified range and ensuring the effect of resisting deformation of the foundation pit.

[0040] Refer to the instruction manual Figure 1-Figure 8 After the axis of the supporting and connecting component 1 is corrected, the jack 2 drives the pressure component 21 to re-apply the axial force to the concrete enclosure structure 100. Since the axial force gradually increases, in order to prevent the force between the annular groove 51 and the ball head 421 from decreasing during this process, thereby causing the axis of the supporting and connecting component 1 to deflect again, the following technical scheme is further proposed. Specifically, a supporting component 7 corresponding to the guiding component 4 is provided on the correction frame 3. The supporting component 7 includes a movable cylinder 71 movably inserted on the correction frame 3. The movable cylinder 71 is movably inserted with an insertion rod 72 at one end close to the positioning pressure plate 5. An elastic component three 73 is provided inside the movable cylinder 71. The elastic component three 73 is used to reset the insertion rod 72 toward the direction of the positioning pressure plate 5. The positioning pressure plate 5 is provided with a support hole 52 corresponding to the insertion rod 72. When the axis of the supporting and connecting component 1 is on a horizontal plane, the axis of the insertion rod 72 coincides with the axis of the support hole 52.

[0041] It should be noted that if Figure 5 As shown, a shift fork 411 is provided at the bottom of the guiding cylinder 41 , and an annular groove is provided at the rear end of the movable cylinder 71 , and the shift fork 411 is inserted into the annular groove, so that the movable cylinder 71 can move synchronously with the guiding cylinder 41 . When the jack 2 drives the pressure component 21 to remove the axial force on the concrete enclosure structure 100, the guide component 4 moves toward the direction of the positioning pressure plate 5. Since the axis of the support connection component 1 is deflected, the insertion rod 72 cannot be inserted into the interior of the support hole 52. The elastic component three 73 is compressed. When the ball head 421 completely enters the annular groove 51, the support connection component 1 is corrected. At this time, the axis of the insertion rod 72 coincides with the axis of the support hole 52. Under the action of the elastic component three 73, the insertion rod 72 is inserted into the interior of the support hole 52. In the process of the jack 2 driving the pressure component 21 to apply axial force to the concrete enclosure structure 100, although the force between the annular groove 51 and the ball head 421 is reduced, the insertion rod 72 will not leave the support hole 52 immediately. Therefore, the insertion rod 72 can play a supporting role to ensure that the axis of the support connection component 1 will not be deflected again. Among them, the elastic component three 73 is a compression spring.

[0042] Refer to the instruction manual Figure 1-Figure 2and Figure 7-Figure 8 The supporting connection assembly 1 includes a middle connection member 12 and a left connection member 11 and a right connection member 13 respectively installed at both ends of the middle connection member 12. The jack 2 is installed on the left connection member 11. The right connection member 13 includes a connection member body 131, a mounting seat 133 and a plurality of square tubes 132. The connection member body 131 is fixed to the end of the middle connection member 12. The connection member body 131 and the mounting seat 133 are connected through the square tube 132. The mounting seat 133 is used to be fixed on the concrete enclosure structure 100.

[0043] It should be noted that if Figure 7 As shown, the square tube 132 is tilted to increase the installation surface and improve the stability of the installation.

[0044] Refer to the instruction manual Figure 1-Figure 8 A concrete support servo combination system includes the above-mentioned square tube diagonal bracing device and a concrete retaining structure 100. One end of the support connection component 1 and the elastic telescopic member 8 are fixedly installed on the concrete retaining structure 100. The jack 2 at the other end of the support connection component 1 drives the pressure component 21 to press on the concrete retaining structure 100, so that the two ends of the support connection component 1 apply axial force to the concrete retaining structure 100 on both sides.

[0045] It should be noted that by combining the reinforced concrete support and the steel structure support together, the axial force compensation can be performed through the jack 2, thereby effectively reducing the deformation of the foundation pit.

[0046] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A square tube diagonal bracing device for foundation pit construction, characterized in that: The invention comprises a support connection assembly (1), wherein a jack (2) is installed at one end of the support connection assembly (1), and a pressure component (21) is installed at the output end of the jack (2), and the jack (2) is used to drive the pressure component (21) to press against the side wall of the concrete enclosure structure (100); during installation, the other end of the support connection assembly (1) is fixed on the side wall of the concrete enclosure structure (100), so that the two ends of the support connection assembly (1) apply axial force to the concrete enclosure structures (100) on both sides; A correction frame (3) is installed at one end of the support connection component (1) close to the jack (2), a plurality of guide components (4) are arranged in the circumferential direction of the correction frame (3), a positioning plate (5) is arranged at the front end of the correction frame (3), a side wall of the positioning plate (5) close to the guide component (4) is provided with an annular groove (51), a plurality of elastic telescopic parts (8) are installed in the circumferential direction of the positioning plate (5), the elastic telescopic parts (8) are used to keep the positioning plate (5) on the concrete enclosure structure (100) connected to the other end of the support connection component (1), and the guide component (4) moves in the opposite direction to the pressure component (21); When the pressure component (21) applies an axial force to the concrete enclosure structure (100), the positioning pressure plate (5) is separated from the concrete enclosure structure (100); when the pressure component (21) removes the axial force from the concrete enclosure structure (100), the guide assembly (4) is pressed against the inside of the annular groove (51); The guiding assembly (4) comprises a guiding cylinder (41), the guiding cylinder (41) being movably arranged on the correction frame (3), a guiding rod (42) being movably inserted into one end of the guiding cylinder (41) close to the positioning pressure plate (5), a second elastic component (43) being arranged inside the guiding cylinder (41), the second elastic component (43) being used for resetting the guiding rod (42) in the direction of the positioning pressure plate (5), and the moving direction of the guiding cylinder (41) and the guiding rod (42) being parallel to the axial direction of the supporting connection assembly (1); The end of the guide rod (42) close to the positioning plate (5) has a ball head (421), and when the ball head (421) is pressed against the inside of the annular groove (51), the outer surface of the ball head (421) fits with the inner surface of the annular groove (51); The pressure-applying component (21) comprises a fixed cylinder (211), the fixed cylinder (211) being fixedly mounted on the output end of the jack (2), a pressure-applying seat (212) being movably plugged into one end of the fixed cylinder (211) away from the jack (2), an elastic component 1 (213) being arranged inside the fixed cylinder (211), the elastic component 1 (213) being used to reset the pressure-applying seat (212) in the direction of the concrete enclosure structure (100); The support connection assembly (1) comprises a middle connection member (12) and a left connection member (11) and a right connection member (13) respectively mounted at two ends of the middle connection member (12); the jack (2) is mounted on the left connection member (11); the right connection member (13) comprises a connection member body (131), a mounting seat (133) and a plurality of square tubes (132); the connection member body (131) is fixed to the end of the middle connection member (12); the connection member body (131) and the mounting seat (133) are connected via the square tube (132); and the mounting seat (133) is used to be fixed on a concrete enclosure structure (100).

2. A square tube diagonal bracing device for foundation pit construction according to claim 1, characterized in that: When the axis of the supporting connection assembly (1) is on a horizontal plane, the axis of the positioning pressure plate (5) coincides with the axis of the supporting connection assembly (1).

3. A square tube diagonal bracing device for foundation pit construction according to claim 1, characterized in that: A transmission assembly (6) is provided between the pressure-applying component (21) and each guide assembly (4), the transmission assembly (6) comprising a connecting rod (61) and a fixed shaft (62), the fixed shaft (62) being fixedly mounted on the correction frame (3), one end of the connecting rod (61) being hinged to the outer wall of the fixed cylinder (211), the other end and the middle of the connecting rod (61) being respectively provided with a straight groove 1 (611) and a straight groove 2 (612), the straight groove 2 (612) being movably sleeved on the outer side of the fixed shaft (62), the outer wall of the guide cylinder (41) being provided with a connecting shaft, the straight groove 1 (611) being sleeved on the outer side of the connecting shaft.

4. A square tube diagonal bracing device for foundation pit construction according to claim 1, characterized in that: The correction frame (3) is provided with a support assembly (7) corresponding to the guide assembly (4) one by one. The support assembly (7) comprises a movable cylinder (71) movably plugged into the correction frame (3). An end of the movable cylinder (71) close to the positioning pressure plate (5) is movably plugged with an insertion rod (72). An elastic component three (73) is provided inside the movable cylinder (71). The elastic component three (73) is used to reset the insertion rod (72) in the direction of the positioning pressure plate (5). The positioning pressure plate (5) is provided with a support hole (52) corresponding to the insertion rod (72). When the axis of the support connection assembly (1) is on a horizontal plane, the axis of the insertion rod (72) coincides with the axis of the support hole (52).

5. A square tube diagonal bracing device for foundation pit construction according to claim 1, characterized in that: The elastic telescopic member (8) comprises a fixed rod (81) and a movable rod (82) whose ends are arranged opposite to each other, an elastic component four (83) is connected between the fixed rod (81) and the movable rod (82), one end of the movable rod (82) is fixedly connected to the positioning plate (5), and one end of the fixed rod (81) away from the positioning plate (5) is connected to a retaining seat (9), and the retaining seat (9) is used to be fixed on the concrete enclosure structure (100).

6. A concrete support servo combination system, characterized in that: A square tube diagonal bracing device according to any one of claims 1 to 5, further comprising a concrete retaining structure (100), wherein one end of the support connection assembly (1) and the elastic telescopic member (8) are fixedly mounted on the concrete retaining structure (100), and a jack (2) at the other end of the support connection assembly (1) drives a pressure component (21) to press against the concrete retaining structure (100), so that the two ends of the support connection assembly (1) apply axial force to the concrete retaining structure (100) on both sides.

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