Foundation pit reinforcing device for constructional engineering

Abstract

The foundation pit reinforcing device comprises a supporting frame, a traction device, a first positioning device, a transmission assembly and a limiting assembly, a plurality of anchor rods are arranged on the supporting frame, the traction device is arranged on the supporting frame in a horizontally-moving mode, a plurality of traction pieces are distributed on the traction device and connected with the anchor rods correspondingly, and the first positioning device and the transmission assembly are arranged on the supporting frame. The traction device is used for pulling an anchor rod driven into a soil layer through a traction piece, the first positioning device is arranged at the bottom of the supporting frame, the first positioning device is connected with the traction device through a transmission assembly, and the first positioning device is used for fixing the supporting frame to the wall of a foundation pit and dragging the traction device through the transmission assembly at the same time; and the limiting assembly is connected with the first positioning device, and the limiting assembly is used for preventing the first positioning device from being pulled out of the ground. The invention belongs to the technical field of foundation pit supporting, and particularly relates to a foundation pit reinforcing device for constructional engineering.

Description

Technical Field

[0001] The present invention belongs to the technical field of foundation pit support, and in particular relates to a foundation pit reinforcement device for construction engineering. Background Art

[0002] As a key engineering technology, foundation pit support plays a crucial role in safeguarding the stability of underground spaces. It effectively protects the safety of construction personnel and equipment, prevents the influx of groundwater and soil, reduces the incidence of engineering accidents, and ensures the smooth progress of construction.

[0003] In related technologies, foundation pit support typically utilizes rigid sheet piles and other anti-overturning structures fixed to the inner walls of the pit. Because this support structure maintains a constant anti-overturning capacity, when the collapse force of a particular pit wall exceeds its anti-overturning capacity, the anti-overturning structure gradually deteriorates and fails, impacting the support and balance of the pit wall. Furthermore, the support method employed is limited to single-structure support structures such as sheet piles, which cannot effectively provide diverse support. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a foundation pit reinforcement device for construction engineering, which effectively solves the above problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a foundation pit reinforcement device for construction projects, including a support frame, a pulling device, a first positioning device, a transmission assembly and a limiting assembly. A plurality of anchor rods are arranged on the support frame, and the pulling device can be moved horizontally on the support frame. A plurality of pulling members are distributed on the pulling device, and the plurality of pulling members are respectively connected to a plurality of anchor rods. The pulling device is used to pull the anchor rods driven into the soil layer through the pulling members. The first positioning device is arranged at the bottom of the support frame, and the first positioning device is connected to the pulling device through the transmission assembly. The first positioning device is used to fix the support frame on the foundation pit wall while dragging the pulling device through the transmission assembly, and then cooperate with the anchor rod to provide support for the support frame to the foundation pit wall. The limiting assembly is connected to the first positioning device, and the limiting assembly is used to prevent the first positioning device from being pulled out of the ground.

[0006] Furthermore, the support frame is connected to multiple support plates, and multiple anchor rods are passed through the support plates. A limiting portion is provided at one end of the anchor rod, and the other end of the anchor rod movably passes through the support plate. A pulling steel cable is fixedly connected inside the anchor rod and passes through the limiting portion.

[0007] Furthermore, the pulling device includes a translation support beam, a main support cross plate, a secondary support cross plate and a pulling column. The main support cross plate, the pulling column and the secondary support cross plate are fixedly connected between the two translation support beams. The pulling column is arranged on both sides of the main support cross plate, and the secondary support cross plate is arranged on one side of the pulling column. A plurality of translation rocker arms are rotatably arranged on each translation support beam. One end of the translation rocker arm is rotatably connected to the translation support beam and the other end is rotatably connected to a support seat. The support seat is welded and fixed to both sides of the support frame. A plurality of pulling members are rotatably arranged on each pulling column, and the pulling members are connected to the pulling steel cables on the corresponding anchor rods.

[0008] Furthermore, the transmission assembly includes a transmission device, a transmission gear and a support frame. A transmission steel cable is connected between the transmission device and the main support cross plate. The transmission device can be raised and lowered on one side of the support frame. The support frame is fixed on the base. The base is fixed on the bottom of the support frame. The transmission gear can be rotatably set on the support frame.

[0009] Furthermore, the transmission device includes two symmetrically arranged transmission tooth plates, which are meshed with the transmission gears. The tops of the two transmission tooth plates are fixedly connected by an upper connecting plate. A first terminal is symmetrically provided on one side of the upper connecting plate. The first terminal is detachably connected to the transmission steel cable. The other end of the transmission steel cable is fixedly connected to a terminal board. The terminal board is rotatably arranged on both sides of the docking part. The docking part is fixedly arranged on the surface of the main support cross plate. The bottoms of the two transmission tooth plates are fixedly connected by a lower connecting plate. Sliding connectors are provided on both sides of the lower connecting plate. A limiting slide rod is passed through the sliding connector. The limiting slide rod is fixedly arranged on one side of the support frame.

[0010] Furthermore, the first positioning device can be raised and lowered and arranged on the other side of the support frame. The first positioning device includes a limit support plate, a positioning rod, a lower pressure plate and a limit member. The lower pressure plate is symmetrically arranged at the bottom of one side of the limit support plate. Multiple positioning rods are respectively fixed at the bottom of each lower pressure plate. A socket is opened on the base surface of the corresponding positioning rod. The limit member is fixed on one side surface of the limit support plate. The other side surface of the limit support plate is symmetrically provided with a rack portion, and the rack portion is engaged with the transmission gear.

[0011] Furthermore, the limit assembly includes a limit support frame, an adjusting screw and a limit pressure plate, the limit support frame is arranged on the front side of the limit support plate, the limit support frame is welded and fixed to the base, a limit slide groove is provided on one side of the limit support frame, a limit guide rod is vertically fixed in the limit slide groove, the adjusting screw is vertically arranged on one side of the limit guide rod, one end of the adjusting screw slides through the limit piece and is rotatably connected to the base and the other end thereof is rotatably connected to the top of the limit support frame, the other end of the adjusting screw is provided with a driving part, a rotating rod is movably provided on the driving part, and the limit pressure plate can be raised and lowered and arranged above the limit piece, one end of the limit pressure plate is threadedly connected to the adjusting screw and the other end thereof is connected to the limit slide groove and is slidably passed through by the limit guide rod.

[0012] Furthermore, the first positioning device is connected to the second positioning device, and the second positioning device includes a positioning pressure plate and a positioning plug plate. A plurality of positioning plug plates are distributed on the lower surface of the positioning pressure plate. A dragging portion is provided on the upper surface of the positioning pressure plate. The top of the support frame is fixedly connected to a supporting top plate. One end of the supporting top plate is rotatably provided with a plurality of pulleys, and a positioning steel cable is rollingly connected to the pulley. One end of the positioning steel cable is fixedly connected to the positioning pressure plate, and the other end of the positioning steel cable is fixedly connected to the top of the limiting support plate.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows: The support frame is used to fit the wall of the foundation pit to play the main supporting role. The pulling device movably arranged on the surface of the support frame cooperates with the anchor rod driven into the soil layer to play a pulling role. At the same time, the first positioning device tightens and drags the pulling device downward through the transmission assembly, further increasing the pulling effect of the pulling device. Under the relative action, the support frame is tightened and fits the wall of the foundation pit, providing a stable support effect.

[0014] The pulling device consists of a translation support beam, a translation swing arm, a main support cross plate pulling column and a pulling piece. During use, the anchor rod driven into the deep layer of the foundation pit wall is pulled by the pulling piece on the pulling column. When the support frame is tilted outward due to the pressure of the surface soil layer of the pit wall, the pulling of the anchor rod will cause the translation support beam to translate upward through the translation swing arm, so that the main support cross plate pulls the transmission device upward through the transmission steel cable. At this time, the first positioning device will move downward in linkage with it, so that the depth of the positioning rod arranged at its bottom inserted into the soil layer is further increased, and the supporting effect of the support frame is further increased in conjunction with the pulling device. As a tilt compensation for the support frame, it provides a continuous and stable support effect, and the support effect increases with the increase of the pressure on the foundation pit wall.

[0015] The limiting assembly connected to the first positioning device can limit the first positioning device after installation by adjusting the cooperation between the lead screw and the limiting pressure plate to ensure that it is firmly inserted into the soil layer and prevent it from falling out. At the same time, the second positioning device connected to the first positioning device through the positioning steel cable is fixed on the soil layer at a certain distance from the top of the foundation pit, which has a reinforcement effect on the top of the support frame, diversifies the support method, and further improves the support effect of the foundation pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural diagram of a foundation pit reinforcement device for construction engineering proposed by the present invention; Figure 2 This is a structural diagram of a limiting assembly of a foundation pit reinforcement device for construction engineering proposed by the present invention; Figure 3This is a schematic diagram of the front view of a foundation pit reinforcement device for construction engineering proposed by the present invention; Figure 4 This is an enlarged structural diagram of the portion marked A of a foundation pit reinforcement device for construction engineering proposed by the present invention; Figure 5 This is a structural diagram of a pulling device for a foundation pit reinforcement device for construction engineering proposed by the present invention; Figure 6 This is a structural diagram of a transmission device for a foundation pit reinforcement device for construction engineering proposed by the present invention; Figure 7 This is a schematic structural diagram of a second positioning device of a foundation pit reinforcement device for construction engineering proposed by the present invention; Figure 8 This is a structural schematic diagram of a first positioning device of a foundation pit reinforcement device for construction engineering proposed by the present invention.

[0017] Among them, 1. Support frame; 2. Pulling device; 3. Anchor rod; 4. First positioning device; 5. Second positioning device; 6. Transmission assembly; 7. Limit assembly; 8. Base; 9. Support top plate; 10. Support plate; 11. Support seat; 12. Pulley; 13. Support frame; 14. Transmission gear; 15. Limit slide rod; 16. Socket; 17. Rotating rod; 18. Drive unit; 19. Adjusting screw; 20. Limit support frame; 21. Limit slide groove; 22. Limit guide rod; 23. Limit pressure plate; 24. Translation support beam; 25. Secondary support cross plate ; 26. Main supporting cross plate; 27. Translation rocker arm; 28. Pulling column; 29. ​​Pulling member; 30. Docking part; 31. Terminal block; 32. Transmission cable; 33. Transmission device; 34. Upper connecting plate; 35. Lower connecting plate; 36. Transmission gear plate; 37. First terminal; 38. Sliding connector; 39. Limiting support plate; 40. Rack part; 41. Limiting member; 42. Lower pressure plate; 43. Positioning rod; 44. Positioning pressure plate; 45. Positioning plug plate; 46. Drag part; 47. Limiting part; 48. Pulling cable; 49. Positioning cable.

[0018] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0021] like Figures 1-8 As shown, the present invention proposes a foundation pit reinforcement device for construction projects, including a support frame 1, a pulling device 2, a first positioning device 4, a transmission assembly 6 and a limit assembly 7. A plurality of anchor rods 3 are arranged on the support frame 1, and the pulling device 2 can be arranged on the support frame 1 for translational movement. A plurality of pulling members 29 are distributed on the pulling device 2, and the plurality of pulling members 29 are respectively connected to the plurality of anchor rods 3. The pulling device 2 is used to pull the anchor rods 3 driven into the soil layer through the pulling members 29. The first positioning device 4 is arranged at the bottom of the support frame 1, and the first positioning device 4 is connected to the pulling device 2 through the transmission assembly 6. The first positioning device 4 is used to fix the support frame 1 on the foundation pit wall while dragging the pulling device 2 through the transmission assembly 6, and then cooperate with the anchor rods 3 to provide support for the support frame 1 to the foundation pit wall. The limit assembly 7 is connected to the first positioning device 4, and the limit assembly 7 is used to prevent the first positioning device 4 from being pulled out of the ground.

[0022] In one embodiment of the present invention, a plurality of support plates 10 are connected to the support frame 1, and a plurality of anchor rods 3 are passed through the support plates 10. A limiting portion 47 is provided at one end of the anchor rod 3, and the other end of the anchor rod 3 movably passes through the support plate 10. A pulling steel cable 48 is fixedly connected inside the anchor rod 3 and passes through the limiting portion 47.

[0023] In one embodiment of the present invention, the pulling device 2 includes a translation support beam 24, a main support cross plate 26, a secondary support cross plate 25 and a pulling column 28. The main support cross plate 26, the pulling column 28 and the secondary support cross plate 25 are fixedly connected between the two translation support beams 24. The pulling column 28 is arranged on both sides of the main support cross plate 26, and the secondary support cross plate 25 is arranged on one side of the pulling column 28. A plurality of translation rocker arms 27 are rotatably arranged on each translation support beam 24. One end of the translation rocker arm 27 is rotatably connected to the translation support beam 24 and the other end is rotatably connected to the support seat 11. The support seat 11 is welded and fixed to both sides of the support frame 1. A plurality of pulling members 29 are rotatably arranged on each pulling column 28. The pulling members 29 are connected to the pulling steel cable 48 on the corresponding anchor rod 3.

[0024] In one embodiment of the present invention, the transmission assembly 6 includes a transmission device 33, a transmission gear 14 and a support frame 13. A transmission steel cable 32 is connected between the transmission device 33 and the main support cross plate 26. The transmission device 33 can be raised and lowered on one side of the support frame 13. The support frame 13 is fixed on the base 8. The base 8 is fixed on the bottom of the support frame 1. The transmission gear 14 can be rotatably set on the support frame 13.

[0025] In one embodiment of the present invention, the transmission device 33 includes two symmetrically arranged transmission tooth plates 36, which are meshed with the transmission gear 14. The tops of the two transmission tooth plates 36 are fixedly connected by an upper connecting plate 34. A first terminal 37 is symmetrically provided on one side of the upper connecting plate 34. The first terminal 37 is detachably connected to the transmission steel cable 32. The other end of the transmission steel cable 32 is fixedly connected to a terminal block 31. The terminal block 31 is rotatably arranged on both sides of the docking portion 30. The docking portion 30 is fixedly arranged on the surface of the main support cross plate 26. The bottoms of the two transmission tooth plates 36 are fixedly connected by a lower connecting plate 35. Sliding connectors 38 are provided on both sides of the lower connecting plate 35. A limiting slide bar 15 is passed through the sliding connector 38. The limiting slide bar 15 is fixedly arranged on one side of the support frame 13.

[0026] In one embodiment of the present invention, the first positioning device 4 can be raised and lowered and arranged on the other side of the support frame 13. The first positioning device 4 includes a limiting support plate 39, a positioning rod 43, a lower pressure plate 42 and a limiting member 41. The lower pressure plate 42 is symmetrically arranged at the bottom of one side of the limiting support plate 39. A plurality of positioning rods 43 are respectively fixed at the bottom of each lower pressure plate 42. A socket 16 is provided on the surface of the base 8 corresponding to the positioning rod 43. The limiting member 41 is fixed on the surface of one side of the limiting support plate 39. The rack portion 40 is symmetrically arranged on the other side surface of the limiting support plate 39, and the rack portion 40 is engaged with the transmission gear 14.

[0027] In one embodiment of the present invention, the limit assembly 7 includes a limit support frame 20, an adjusting screw 19 and a limit pressure plate 23. The limit support frame 20 is arranged on the front side of the limit support plate 39, and the limit support frame 20 is welded and fixed to the base 8. A limit slide groove 21 is provided on one side of the limit support frame 20, and a limit guide rod 22 is vertically fixed in the limit slide groove 21. The adjusting screw 19 is vertically arranged on one side of the limit guide rod 22, one end of the adjusting screw 19 slides through the limit member 41 and is rotatably connected to the base 8 and its other end is rotatably connected to the top of the limit support frame 20, the other end of the adjusting screw 19 is provided with a driving part 18, and a rotating rod 17 is movably provided on the driving part 18, and the limit pressure plate 23 can be lifted and lowered above the limit member 41, one end of the limit pressure plate 23 is threadedly connected to the adjusting screw 19 and its other end is connected to the limit slide groove 21 and is slidably penetrated by the limit guide rod 22.

[0028] In one embodiment of the present invention, the first positioning device 4 is connected to the second positioning device 5, and the second positioning device 5 includes a positioning pressure plate 44 and a positioning plug plate 45. A plurality of positioning plug plates 45 are distributed on the lower surface of the positioning pressure plate 44, and a dragging portion 46 is provided on the upper surface of the positioning pressure plate 44. The top of the support frame 1 is fixedly connected to a supporting top plate 9, and one end of the supporting top plate 9 is rotatably provided with a plurality of pulleys 12. A positioning steel cable 49 is rollingly connected to the pulley 12, and one end of the positioning steel cable 49 is fixedly connected to the positioning pressure plate 44, and the other end of the positioning steel cable 49 is fixedly connected to the top of the limiting support plate 39.

[0029] Working principle: When using a foundation pit reinforcement device for construction engineering of the present invention to support and reinforce the foundation pit wall, the device is first installed at the designated pit wall. The relevant personnel will fit the support frame 1 at the designated pit wall, and then drive multiple groups of anchor rods 3 through the support plate 10 into the depth of the pit wall, so that a certain space is left between the limit part 47 set at the end of the anchor rod 3 and the support plate 10, and then the pulling steel cable 48 extending from the limit part 47 is connected to the pulling piece 29 on the pulling column 28, and the space and posture between the pulling device 2 and the remaining support plate 10 are maintained as follows. Figure 1 The state shown in FIG1 makes the translation support beam 24 cooperate with the translation rocker arm 27 to be in an upward translation posture under the traction of the anchor rod 3, so that when subjected to subsequent force, it can move upward under the drive of this structure, and then the relevant personnel drive the first positioning device 4 on one side into the soil layer at that location, wherein the relevant personnel use relevant hammers or pressure devices to press down the lower pressure plate 42, so that the positioning rod 43 set at its bottom passes through the socket 16 on the base 8 and is inserted into the soil layer below to a certain depth, and reserves space for further exploration, and then the relevant personnel can drive the adjusting screw 19 by the rotating rod 17 to adjust the limit pressure plate 23 downward and fit it on the limit member 41 to limit the limit support plate 39 as a whole. At the same time, under the linkage of the transmission gear 14, the transmission device 33 on one side is driven upward by the transmission tooth plate 36, and then the relevant personnel use the transmission steel cable 32 to connect the docking part 30 with the first terminal 37 at the upper connecting plate 34. At this time, the transmission device 33 forms a downward pulling effect on the pulling device 2; In the embodiment of the present application, relevant personnel can also set a second positioning device 5 on the surface of the soil layer at a certain distance from the top of the foundation pit, insert the positioning plug plate 45 distributed at the bottom of the positioning pressure plate 44 into the soil layer, and use the positioning steel cable 49 to connect with the first positioning device 4 under the transmission of the pulley 12 installed on the supporting top plate 9, so as to form a pulling and reinforcing effect on the top of the supporting frame 1, and then complete the static support effect of the foundation pit wall; In one embodiment of the present application, the support frame 1 under static support may be squeezed by the soil layer of the foundation pit wall and tilted outward. During this process, the pulling device 2 can be reinforced with the first positioning device 4 under the cooperation of the transmission component 6. Among them, when the upper part of the support frame 1 tilts outward, under the pulling of the anchor rod 3, the pulling device 2 and the support frame 1 are moved upward through the translation rocker bar 27 under the interaction force. At this time, the docking part 30 provided on the main support cross plate 26 can pull up the transmission device 33 through the transmission steel cable 32. At this time, the upper connecting plate 34 drives the transmission tooth plate 36 to move upward, so that the lower connecting plate 35 moves up along the limiting slide bar 15 provided on the support frame 13 through the sliding connectors 38 on both sides. , under the cooperation of the transmission gear 14 and the transmission tooth plate 36, the transmission gear 14 drives the rack part 40 set on one side of the first positioning device 4 to descend, thereby causing the limit support plate 39 to descend as a whole, and the positioning rod 43 distributed at the bottom of the lower pressure plate 42 cooperates with the anchor rod 3 and the pulling device 2 to limit the inclination of the support frame 1 through the resistance of the soil layer, and gradually increases the depth of insertion into the soil layer, and cooperates with the pulling device 2 to further increase the reinforcement effect. At the same time, the second positioning device 5 can also pull the first positioning device 4 through the positioning steel cable 49, while reinforcing the upper part of the support frame 1, it supports and limits the inclination of the support frame 1 in cooperation with the pulling device 2, thereby achieving a dynamic support effect, which can increase the support effect as the pressure on the foundation pit wall increases.

[0030] To sum up, the present invention is a foundation pit reinforcement device for construction projects: a support frame is used to fit the foundation pit wall to play a main supporting effect, a pulling device movably arranged on the surface of the support frame cooperates with the anchor rod driven into the soil layer to play a pulling effect, and at the same time, the first positioning device tightens and drags the pulling device downward through the transmission assembly, further increasing the pulling effect of the pulling device, and under the relative action, the support frame is tightly fitted to the foundation pit wall, providing a stable support effect. The pulling device consists of a translation support beam, a translation swing arm, a main support cross plate pulling column and a pulling piece. During use, the anchor rod driven into the deep layer of the foundation pit wall is pulled by the pulling piece on the pulling column. When the support frame is tilted outward due to the pressure of the surface soil layer of the pit wall, the pulling of the anchor rod will cause the translation support beam to translate upward through the translation swing arm, so that the main support cross plate pulls the transmission device upward through the transmission steel cable. At this time, the first positioning device will move downward in linkage with it, so that the depth of the positioning rod arranged at its bottom inserted into the soil layer is further increased, and the supporting effect of the support frame is further increased in conjunction with the pulling device. As a tilt compensation for the support frame, it provides a continuous and stable support effect, and the support effect increases with the increase of the pressure on the foundation pit wall. The limiting assembly connected to the first positioning device can limit the first positioning device after installation by adjusting the cooperation between the lead screw and the limiting pressure plate to ensure that it is firmly inserted into the soil layer and prevent it from falling out. At the same time, the second positioning device connected to the first positioning device through the positioning steel cable is fixed on the soil layer at a certain distance from the top of the foundation pit, which has a reinforcement effect on the top of the support frame, diversifies the support method, and further improves the support effect of the foundation pit.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0033] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A foundation pit reinforcement device for construction engineering, characterized by: It comprises a support frame (1), a pulling device (2), a first positioning device (4), a transmission assembly (6) and a limit assembly (7); The support frame (1) is provided with a plurality of anchor rods (3); The pulling device (2) is arranged on the support frame (1) in a translationally movable manner. A plurality of pulling members (29) are distributed on the pulling device (2). The plurality of pulling members (29) are respectively connected to a plurality of anchor rods (3). The pulling device (2) is used to pull the anchor rods (3) driven into the soil layer through the pulling members (29); The first positioning device (4) is arranged at the bottom of the support frame (1), and the first positioning device (4) is connected to the pulling device (2) through the transmission component (6). The first positioning device (4) is used to fix the support frame (1) on the foundation pit wall, and at the same time, drag the pulling device (2) through the transmission component (6), thereby cooperating with the anchor rod (3) to provide support for the support frame (1) to the foundation pit wall. The limiting assembly (7) is connected to the first positioning device (4), and the limiting assembly (7) is used to prevent the first positioning device (4) from being pulled out from the ground.

2. A foundation pit reinforcement device for construction engineering according to claim 1, characterized in that: A plurality of support plates (10) are connected to the support frame (1), and a plurality of anchor rods (3) are passed through the support plates (10). A limiting portion (47) is provided at one end of the anchor rod (3), and the other end of the anchor rod (3) movably passes through the support plate (10). A pulling steel cable (48) is fixedly connected inside the anchor rod (3) and passes through the limiting portion (47).

3. The foundation pit reinforcement device for construction engineering according to claim 2, characterized in that: The pulling device (2) comprises a translation support beam (24), a main support transverse plate (26), a secondary support transverse plate (25) and a pulling column (28); A main support transverse plate (26), a pulling column (28) and a secondary support transverse plate (25) are fixedly connected between the two translation support beams (24), wherein the pulling column (28) is arranged on both sides of the main support transverse plate (26), and the secondary support transverse plate (25) is arranged on one side of the pulling column (28); A plurality of translation rocker arms (27) are rotatably provided on each translation support beam (24), one end of the translation rocker arm (27) is rotatably connected to the translation support beam (24) and the other end is rotatably connected to a support seat (11), and the support seat (11) is welded and fixed to both sides of the support frame (1); A plurality of pulling members (29) are rotatably arranged on each pulling column (28), and the pulling members (29) are connected to the pulling steel cables (48) on the corresponding anchor rods (3).

4. The foundation pit reinforcement device for construction engineering according to claim 3, characterized in that: The transmission assembly (6) includes a transmission device (33), a transmission gear (14) and a support frame (13); A transmission steel cable (32) is connected between the transmission device (33) and the main support horizontal plate (26), and the transmission device (33) is arranged on one side of the support frame (13) in a liftable manner; The support frame (13) is fixedly arranged on the base (8), and the base (8) is fixedly arranged on the bottom of the support frame (1); The transmission gear (14) is rotatably arranged on the support frame (13).

5. The foundation pit reinforcement device for construction engineering according to claim 4, characterized in that: The transmission device (33) includes two symmetrically arranged transmission tooth plates (36), the transmission tooth plates (36) meshing with the transmission gear (14), the tops of the two transmission tooth plates (36) being fixedly connected via an upper connecting plate (34), one side of the upper connecting plate (34) being symmetrically provided with a first terminal (37), the first terminal (37) being detachably connected to the transmission steel cable (32), the other end of the transmission steel cable (32) being fixedly connected to a terminal board (31), the terminal board (31) being rotatably arranged on both sides of the docking portion (30), and the docking portion (30) being fixedly arranged on the surface of the main support horizontal plate (26); The bottoms of the two transmission tooth plates (36) are fixedly connected via a lower connecting plate (35), and sliding connectors (38) are provided on both sides of the lower connecting plate (35). A limiting slide rod (15) is passed through the sliding connector (38), and the limiting slide rod (15) is fixedly provided on one side of the support frame (13).

6. The foundation pit reinforcement device for construction engineering according to claim 5, characterized in that: The first positioning device (4) is liftable and arranged on the other side of the support frame (13), and the first positioning device (4) comprises a limiting support plate (39), a positioning rod (43), a lower pressing plate (42) and a limiting member (41); The lower pressing plate (42) is symmetrically arranged at the bottom of one side of the limiting support plate (39); A plurality of positioning rods (43) are respectively fixedly arranged at the bottom of each lower pressing plate (42), and a socket (16) is provided on the surface of the base (8) corresponding to the positioning rod (43); The limiting member (41) is fixedly arranged on a side surface of the limiting support plate (39); A rack portion (40) is symmetrically provided on the other side surface of the position-limiting support plate (39), and the rack portion (40) is meshed with the transmission gear (14).

7. The foundation pit reinforcement device for construction engineering according to claim 6, characterized in that: The limiting assembly (7) includes a limiting support frame (20), an adjusting screw (19) and a limiting pressure plate (23); The limiting support frame (20) is arranged on the front side of the limiting support plate (39), the limiting support frame (20) is welded and fixed to the base (8), a limiting slide groove (21) is provided on one side of the limiting support frame (20), and a limiting guide rod (22) is vertically fixed in the limiting slide groove (21); The adjusting screw (19) is vertically arranged on one side of the limiting guide rod (22), one end of the adjusting screw (19) slides through the limiting member (41) and is rotatably connected to the base (8), and the other end is rotatably connected to the top of the limiting support frame (20), and the other end of the adjusting screw (19) is provided with a driving part (18), and a rotating rod (17) is movably provided on the driving part (18); The limiting pressure plate (23) can be lifted and lowered above the limiting member (41), one end of the limiting pressure plate (23) is threadedly connected to the adjusting screw (19) and the other end is connected to the limiting slide groove (21) and is slidably penetrated by the limiting guide rod (22).

8. The foundation pit reinforcement device for construction engineering according to claim 7, characterized in that: The first positioning device (4) is connected to a second positioning device (5), and the second positioning device (5) includes a positioning pressure plate (44) and a positioning plug plate (45). A plurality of the positioning plug plates (45) are distributed on the lower surface of the positioning pressure plate (44). A dragging portion (46) is provided on the upper surface of the positioning pressure plate (44). The top of the support frame (1) is fixedly connected to a supporting top plate (9). One end of the supporting top plate (9) is rotatably provided with a plurality of pulleys (12). A positioning steel cable (49) is rollingly connected to the pulley (12). One end of the positioning steel cable (49) is fixedly connected to the positioning pressure plate (44), and the other end of the positioning steel cable (49) is fixedly connected to the top of the limiting support plate (39).

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