Foundation pit supporting equipment for geotechnical engineering

Abstract

The invention relates to the technical field of civil engineering, in particular to geotechnical engineering foundation pit supporting equipment which comprises a base, a first sliding supporting plate and a second sliding supporting plate which can slide towards the two sides in a positioning mode according to the width of a foundation pit are arranged at the two ends of the base, and supporting frames are fixedly connected to the first sliding supporting plate and the second sliding supporting plate correspondingly. The supporting frame is provided with a fixed-point supporting structure capable of adjusting supporting sites according to the depth of a foundation pit, the fixed-point supporting structure comprises a blocking plate capable of vertically moving along the side wall of the foundation pit, and the two ends of the first sliding supporting plate and the two ends of the second sliding supporting plate are each provided with a fixing structure matched with the fixed-point supporting structure. The fixing structure comprises a plug pin which can adjust the inclination angle according to the position of the barrier plate on the side wall of the foundation pit and is used for being matched with a stress site, and the problems that in the prior art, the supporting site of the barrier plate cannot be adjusted to support the side face of the foundation pit, and the stability of the plug pin and the ground of the foundation pit is poor are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, and in particular to foundation pit supporting equipment for geotechnical engineering. Background Art

[0002] Geotechnical engineering is a general term for any kind of rock and soil that make up the earth's crust from the perspective of engineering construction. Geotechnical engineering mainly focuses on solving engineering problems of rock and soil, and takes foundations and bases as research objects.

[0003] During the research of foundation, a foundation pit will be excavated. The foundation pit refers to the underground space excavated from the ground downwards. The excavation of the foundation pit will cause deformation of the surrounding soil, and after the excavation of the foundation pit, due to its large depth, the supporting force of the foundation pit side surface is poor. The buildings around the foundation pit side surface will collapse due to the instability of the foundation pit side surface. In order to ensure the smooth construction of the foundation pit and the safety of the surrounding buildings, a support structure is set between the foundation pit and the side walls of the foundation pit, and the blocking plates on the support structure are used to block the side walls.

[0004] However, the existing support structure still has the following shortcomings: 1. Since the base of the support equipment is installed in the foundation pit and the structure of the support equipment is fixed, when the depth of the foundation pit changes, the support position of the blocking plate cannot be adjusted to support the side surface of the foundation pit, and the applicability is poor; 2. The base is installed in the foundation pit, and usually it is necessary to use nails to fix the base in the foundation pit. After the supporting position of the blocking plate is adjusted, the force direction of the base on the side wall of the foundation pit through the blocking plate changes, causing the force point of the nail to change, affecting the stability of the nail and the foundation pit ground. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a foundation pit support equipment for geotechnical engineering, which effectively solves the problems in the prior art that the supporting position of the blocking plate cannot be adjusted to support the edge surface of the foundation pit and the stability of the nails and the foundation pit ground is poor.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A foundation pit support device for geotechnical engineering, comprising a base, wherein both ends of the base are provided with a first sliding support plate and a second sliding support plate which can be positioned and slid to both sides according to the width of the foundation pit, the first sliding support plate and the second sliding support plate are respectively fixedly connected with a support frame, the support frame is provided with a fixed-point support structure which can adjust the support position according to the depth of the foundation pit, the fixed-point support structure comprises a blocking plate which can move vertically along the side wall of the foundation pit, and both ends of the first sliding support plate and the second sliding support plate are respectively provided with a fixed structure which cooperates with the fixed-point support structure, the fixed structure comprises a pin which can adjust the inclination angle according to the position of the blocking plate on the side wall of the foundation pit to adapt to the force-bearing position.

[0007] Furthermore, the inner walls of the first sliding support plate and the second sliding support plate are respectively slidably connected to two sides of the base, and both ends of the first sliding support plate and the second sliding support plate are respectively provided with fixing bolts corresponding to the base.

[0008] Furthermore, the fixed-point support structure also includes a positioning pin barrel fixedly arranged on the base, a screw rod is rotatably connected in the positioning pin barrel, a sliding block is arranged between the support frames, a first fixed axis block is arranged at one end of the sliding block, a screw barrel threadably connected to the screw rod is fixedly connected to the inner wall of the first fixed axis block, sliding plates are slidably connected to the inner walls of both sides of the sliding block, a mounting block fixedly connected to the sliding plate is arranged in the support frame, sliding pins slidably connected to the inner wall of the support frame are respectively arranged at both ends of the mounting block, and a spur rack is also arranged on the mounting block.

[0009] The gear train is a gear that is coupled to the first gear and the gear is coupled to the first gear, and the gear train is a gear that is coupled to the first gear and the gear is coupled to the first gear.

[0010] The second end of the second guide wheel assembly is connected to the second rotatable plate, and the second guide wheel assembly is connected to the second rotatable plate by the spring, and the spring is connected to the second guide wheel assembly at the second rotatable plate.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention sets a fixed-point support structure, moves the blocking plate along the side wall of the foundation pit to the upper edge of the foundation pit, and uses the blocking plate to block and support the upper edge of the foundation pit to avoid collapse of the foundation pit edge. The present invention can support the edges of foundation pits of different depths and has strong applicability.

[0012] 2. By setting a fixed structure, after the supporting position of the blocking plate is adjusted, the force direction of the side wall of the foundation pit on the base through the blocking plate changes, and the deflection direction of the first rotating frame and the second rotating frame is the same as the tilt direction of the pin. Therefore, when the blocking plate is pressed on the base, there will be oblique pressure. Therefore, by fixing the pin in the foundation pit with the insertion direction opposite to the force direction, on the one hand, corresponding pressure can be applied to the pin, and on the other hand, a large deviation between the insertion direction of the pin and the force direction can be avoided, which will cause the pin to tilt and affect the stability of the pin and the foundation pit ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a first structural schematic diagram of a foundation pit supporting device for geotechnical engineering of the present invention; Figure 2 It is a second structural schematic diagram of a foundation pit supporting device for geotechnical engineering of the present invention; Figure 3 It is a structural schematic diagram of a first sliding support plate of a foundation pit supporting device for geotechnical engineering of the present invention; Figure 4 It is a structural schematic diagram of a sliding support block of a foundation pit supporting equipment for geotechnical engineering of the present invention; Figure 5 It is a structural schematic diagram of a blocking plate of a foundation pit supporting equipment for geotechnical engineering of the present invention; Figure 6 It is a structural schematic diagram of a first rotating frame and a second rotating frame of a foundation pit supporting device for geotechnical engineering of the present invention; Figure 7 It is a structural schematic diagram of a meshing gear and a fixed gear of a foundation pit supporting device for geotechnical engineering of the present invention; Figure 8 It is a structural schematic diagram of a fixed structure of a foundation pit supporting equipment for geotechnical engineering of the present invention; Fig. 9 It is a structural schematic diagram of a rotating frame block of a foundation pit supporting equipment for geotechnical engineering of the present invention; Fig.10 A foundation pit support device for geotechnical engineering of the present invention Figure 1 A partial enlarged view of area A; In the figure: 1, base, 2, first sliding support plate, 3, second sliding support plate, 4, support frame, 5, blocking plate, 6, pin, 7, fixed support plate, 8, sliding support block, 9, sliding support plate, 10, mounting block, 11, screw rod, 12, first fixed shaft block, 13, rotating handle, 14, screw barrel, 15, spur rack, 16, sliding pin, 17, second rotating frame, 18, first rotating frame, 19, spur gear, 20, fixed rod, 21, auxiliary rotating rod, 2 2. transverse rod, 23. active rotating rod, 24. meshing gear, 25. fixed gear, 26. turntable, 27. first fixed pin, 28. slide rod, 29. turntable block, 30. second fixed shaft block, 31. rotating column, 32. first slide, 33. second fixed pin, 34. limit block, 35. second transmission rod, 36. first transmission rod, 37. positioning pin cylinder, 38. second slide, 39. third slide, 40. fixing bolt. DETAILED DESCRIPTION

[0014] like Figure 1-10 As shown, a foundation pit support equipment for geotechnical engineering comprises a base 1, wherein both ends of the base 1 are provided with a first sliding support plate 2 and a second sliding support plate 3 which can be positioned and slid to both sides according to the width of the foundation pit, and the first sliding support plate 2 and the second sliding support plate 3 are respectively fixedly connected with a support frame 4, and the support frame 4 is provided with a fixed-point support structure which can adjust the support position according to the depth of the foundation pit, and the fixed-point support structure comprises a blocking plate 5 which can move vertically along the side wall of the foundation pit, and both ends of the first sliding support plate 2 and the second sliding support plate 3 are respectively provided with a fixed structure which cooperates with the fixed-point support structure, and the fixed structure comprises a pin 6 which can adjust the inclination angle according to the position of the blocking plate 5 on the side wall of the foundation pit to adapt to the force position.

[0015] When the support plate 5 is in the upper position, the support plate 5 is moved to the upper position, and the support plate 5 is supported by the support plate 6, so that the support plate 6 can be supported on the upper position, and the support plate 6 can be supported on the lower position, so that the support plate 5 can be supported on the lower position, and the support plate 6 can be supported on the lower position, so that the support plate 5 can be supported on the lower position, and the support plate 6 can be supported on the lower position, so that the support plate 6 can be supported on the lower position, and the support plate 6 can be supported on the lower position,

[0016] The inner walls of the first sliding support plate 2 and the second sliding support plate 3 are slidably connected to the two sides of the base 1 respectively, and the two ends of the first sliding support plate 2 and the second sliding support plate 3 are respectively provided with fixing bolts 40 corresponding to the base 1.

[0017] like Figure 2 As shown, the first sliding plate 2 and the second sliding plate 3 can usually be slidably connected to the base 1, and the distance between the first sliding plate 2 and the second sliding plate 3 can be adjusted according to the width of the foundation pit. The fixing bolts 40 can fix the relative positions of the base 1 and the first sliding plate 2 and the second sliding plate 3.

[0018] The fixed-point support structure also includes a positioning pin barrel 37 fixedly arranged on the base 1, and a screw rod 11 is rotatably connected in the positioning pin barrel 37. A sliding block 8 is arranged between the support frames 4, and a first fixed axis block 12 is arranged at one end of the sliding block 8. A screw barrel 14 threadedly connected to the screw rod 11 is fixedly connected to the inner wall of the first fixed axis block 12. The inner walls on both sides of the sliding block 8 are respectively slidably connected to sliding support plates 9. A mounting block 10 fixedly connected to the sliding support plate 9 is arranged in the support frame 4, and sliding pins 16 slidably connected to the inner wall of the support frame 4 are respectively arranged at both ends of the mounting block 10. A spur rack 15 is also arranged on the mounting block 10.

[0019] like Figure 1 and 2 As shown in 4, the positioning pin barrel 37 supports and limits the rotation of the screw rod 11. A turning handle 13 is provided at the upper end of the screw rod 11, and the turning handle 13 drives the screw rod 11 to rotate. During the rotation of the screw rod 11, the screw barrel 14 threadedly cooperates with the inner wall of the first fixed shaft block 12 to drive the sliding block 8 to move axially along the screw rod 11. The sliding block 8 drives the sliding plates 9 at both ends to move up and down respectively. The sliding plates 9 can slide toward both ends along the inner wall of the sliding block 8 to accommodate the movement of the first sliding support plate 2 and the second sliding support plate 3. The sliding support plate 9 drives the mounting block 10 to move up and down along the inner wall of the support frame 4 under the limitation of the sliding pin 16, and the mounting block 10 drives the spur rack 15 to move in the vertical direction.

[0020] The upper and lower ends of the support frame 4 are rotatably connected with the first transmission rod 36 and the second transmission rod 35, respectively. The first transmission rod 36 and the second transmission rod 35 are respectively fixedly connected with the first rotating frame 18 and the second rotating frame 17, respectively. The first rotating frame 18 and the second rotating frame 17 are arranged in parallel, and the rotation axis points of the first rotating frame 18 and the second rotating frame 17 on the support frame 4 are arranged in parallel with the vertical direction of the support frame 4. The first transmission rod 36 is fixedly connected with a spur gear 19 meshing with the spur rack 15, and one end of the first rotating frame 18 is rotatably connected with a meshing gear 24, and the two ends of the meshing gear 24 are respectively coaxially fixedly connected with An active rotating rod 23, one end of the second rotating frame 17 is fixedly connected with a fixed gear 25 meshing with the meshing gear 24, and both ends of the fixed gear 25 are coaxially rotatably connected with an auxiliary rotating rod 21 arranged parallel to the active rotating rod 23, and both ends of the meshing gear 24 and the fixed gear 25 are respectively provided with a fixed rod 20, and the fixed rod 20 is arranged parallel to the rotating axis point of the first rotating frame 18 and the second rotating frame 17 on the support frame 4, and the active rotating rod 23 and the auxiliary rotating rod 21 are respectively rotatably connected with a transverse rod 22 parallel to the fixed rod 20, and the transverse rod 22 is provided with a fixed support plate 7 fixedly connected to the blocking plate 5.

[0021] like Figure 3 and 5As shown in 6 and 7, the mounting block 10 drives the spur rack 15 to move downward, and the spur rack 15 drives the spur gear 19 to rotate counterclockwise, and the spur gear 19 drives the first rotating frame 18 to rotate through the first transmission rod 36. One end of the first rotating frame 18 is connected to one end of the second rotating frame 17 through the fixed rod 20, and the fixed rod 20 is parallel to the rotating axis points of the first rotating frame 18 and the second rotating frame 17 on the support frame 4. Since the first rotating frame 18 and the second rotating frame 17 are arranged in parallel, when the first rotating frame 18 and the second rotating frame 17 remain in a parallel state and rotate counterclockwise, there is a transmission ratio difference between the meshing gear 24 rotatably arranged at one end of the first rotating frame 18 and the fixed gear 25 fixedly connected at one end of the second rotating frame 17. Therefore, the meshing gear 24 will mesh with the fixed gear 25 as the first rotating frame 18 swings, thereby driving the meshing gear 24 to rotate. Since the meshing gear 24 is coaxially fixedly connected to the active rotating rod 23, the meshing gear 24 The gear 24 drives the active rotating rod 23 to rotate. The active rotating rod 23 is arranged parallel to the auxiliary rotating rod 21, and the other ends of the active rotating rod 23 and the auxiliary rotating rod 21 are respectively rotatably arranged on the transverse connecting rod 22, and the transverse connecting rod 22 is arranged parallel to the fixed rod 20. Therefore, the transverse connecting rod 22 and the fixed rod 20 and the active rotating rod 23 and the auxiliary rotating rod 21 form a parallelogram structure, and the transverse connecting rod 22 always maintains a vertically parallel state for up and down movement, and when the first rotating frame 18 and the second rotating frame 17 deflect upward counterclockwise, the fixed support plate 7 will tend to move in the direction of the support frame 4, and the active rotating rod 23 and the auxiliary rotating rod 21 will also deflect upward clockwise, and the fixed support plate 7 will tend to move in the opposite direction of the support frame 4, thereby compensating for the horizontal movement deviation of the fixed support plate 7, ensuring that the fixed support plate 7 always maintains vertical movement, and the fixed support plate 7 drives the blocking plate 5 to move in the vertical direction, and adjusts the supporting position of the fixed support plate 7 on the foundation pit according to the depth of the foundation pit.

[0022] The fixed structure also includes a rotating disk 26 fixedly connected to the second transmission rod 35, a first fixing pin 27 is arranged at the non-center of the rotating disk 26, and two ends of the first sliding support plate 2 and the second sliding support plate 3 are respectively provided with a sliding groove rod 28, and the sliding groove rod 28 is respectively provided with a first sliding groove 32 and a second sliding groove 38, and the lower end of the sliding groove rod 28 is provided with a limiting block 34, the first fixing pin 27 is arranged in the first sliding groove 32, and the two ends of the first sliding support plate 2 and the second sliding support plate 3 are respectively provided with a rotating frame block 29 corresponding to the sliding groove rod 28, the middle end of the rotating frame block 29 is fixedly connected to a rotating column 31, and the upper end of the rotating frame block 29 is fixedly connected to a second fixing pin 33 arranged in parallel with the vertical axis of the rotating column 31, the second fixing pin 33 is arranged in the second sliding groove 38, and the rotating frame block 29 is fixedly connected to a second fixed shaft block 30, and the second fixed shaft block 30 is provided with the said pin 6.

[0023] like Figure 3 and 8As shown in -10, when the second rotating frame 17 deflects counterclockwise, it drives the second transmission rod 35 to rotate, the second transmission rod 35 drives the rotating disk 26 to rotate, and the rotating disk 26 drives the first fixing pin 27 to rotate, and the first fixing pin 27 corresponds to the first sliding groove 32 on the sliding groove rod 28, thereby driving the sliding groove rod 28 to slide under the action of the limit block 34, and the first sliding support plate 2 and the second sliding support plate 3 are respectively provided with a third sliding groove 39 slidably connected to the limit block 34 at both ends. During the sliding process of the sliding groove rod 28, the second sliding groove 38 corresponds to the second fixing pin 33 on the rotating frame block 29, thereby driving the rotating frame block 29 to deflect with the rotating column 31 as the axis, and the rotating column 31 is respectively rotatably arranged on the first sliding support plate 2 and the second sliding support plate 3, and the rotating frame block 29 adjusts the inclination angle of the pin 6 through the second fixed axis block 30, and is Figure 2 It can be seen that the deflection direction of the first rotating frame 18 and the second rotating frame 17 is the same as the tilting direction of the pin 6. Therefore, when the blocking plate 5 is pressed and applied to the base 1, there will be an oblique pressure. Therefore, by fixing the insertion direction of the pin 6 in the foundation pit opposite to the force direction, on the one hand, the corresponding pressure can be applied to the pin 6, and on the other hand, it can also avoid a large deviation between the insertion direction of the pin 6 and the force direction, which will cause the pin 6 to tilt and affect the stability of the pin 6 and the foundation pit ground.

[0024] The working process of the present invention is as follows: when the present invention is in use, the first sliding plate 2 and the second sliding plate 3 are adjusted according to the width of the foundation pit to slide toward the two ends of the base 1 until the blocking plate 5 is in contact with the side wall of the foundation pit, and the fixing bolts 40 can fix the relative positions of the base 1 and the first sliding plate 2 and the second sliding plate 3.

[0025] According to the depth of the foundation pit, the screw 11 is driven to rotate by the turning handle 13. During the rotation of the screw 11, the screw barrel 14 on the inner wall of the first fixed shaft block 12 is threadedly matched to drive the sliding block 8 to move axially along the screw 11. The sliding block 8 drives the sliding support plates 9 at both ends to move up and down respectively. The sliding support plates 9 can slide along the inner wall of the sliding support block 8 to both ends, and are used for the movement of the first sliding support plate 2 and the second sliding support plate 3. The sliding support plate 9 drives the mounting block 10 to move up and down along the inner wall of the support frame 4 under the limitation of the sliding pin 16. The mounting block 10 drives the spur rack 15 to move in the vertical direction. The mounting block 10 The spur rack 15 is driven to move downward, and the spur rack 15 drives the spur gear 19 to rotate counterclockwise. The spur gear 19 drives the first rotating frame 18 to rotate through the first transmission rod 36. One end of the first rotating frame 18 is connected to one end of the second rotating frame 17 through the fixing rod 20, and the fixing rod 20 is parallel to the rotating shaft points of the first rotating frame 18 and the second rotating frame 17 on the supporting frame 4. Since the first rotating frame 18 and the second rotating frame 17 are arranged in parallel, when the first rotating frame 18 and the second rotating frame 17 are kept in a parallel state and rotate counterclockwise, the meshing gear 24 arranged at one end of the first rotating frame 18 rotates with the second rotating frame 17. The fixed gear 25 fixedly connected at one end has a transmission ratio difference, so the meshing gear 24 will mesh with the fixed gear 25 when the first rotating frame 18 swings, thereby driving the meshing gear 24 to rotate. Since the meshing gear 24 is coaxially fixedly connected to the active rotating rod 23, the meshing gear 24 drives the active rotating rod 23 to rotate. Since the active rotating rod 23 is arranged in parallel with the auxiliary rotating rod 21, and the other ends of the active rotating rod 23 and the auxiliary rotating rod 21 are respectively rotatably arranged on the transverse rod 22, and the transverse rod 22 is arranged in parallel with the fixed rod 20, the transverse rod 22, the fixed rod 20 and the active rotating rod 23 And the auxiliary rotating rod 21 forms a parallelogram structure, the cross-linking rod 22 always maintains a vertically parallel state to move up and down, and when the first rotating frame 18 and the second rotating frame 17 deflect counterclockwise upward, the fixed support plate 7 will tend to move towards the support frame 4, the active rotating rod 23 and the auxiliary rotating rod 21 also deflect clockwise upward, and the fixed support plate 7 will tend to move in the opposite direction of the support frame 4, thereby compensating for the horizontal movement deviation of the fixed support plate 7, ensuring that the fixed support plate 7 always maintains vertical movement, the fixed support plate 7 drives the blocking plate 5 to move in the vertical direction, and adjusts the supporting position of the fixed support plate 7 on the foundation pit according to the depth of the foundation pit.

[0026] When the second rotating frame 17 deflects counterclockwise, it drives the second transmission rod 35 to rotate, the second transmission rod 35 drives the rotating disk 26 to rotate, the rotating disk 26 drives the first fixing pin 27 to rotate, the first fixing pin 27 corresponds to the first sliding groove 32 on the sliding groove rod 28, and then drives the sliding groove rod 28 to slide under the action of the limit block 34, and during the sliding process of the sliding groove rod 28, the second sliding groove 38 corresponds to the second fixing pin 33 on the rotating frame block 29, thereby driving the rotating frame block 29 to deflect with the rotating column 31 as the axis, and the rotating frame block 29 adjusts the inclination angle of the pin 6 through the second fixed axis block 30, and is Figure 2 It can be seen that the deflection direction of the first rotating frame 18 and the second rotating frame 17 is the same as the tilting direction of the pin 6. Therefore, when the blocking plate 5 is pressed and applied to the base 1, there will be an oblique pressure. Therefore, by fixing the insertion direction of the pin 6 in the foundation pit opposite to the force direction, on the one hand, the corresponding pressure can be applied to the pin 6, and on the other hand, it can also avoid a large deviation between the insertion direction of the pin 6 and the force direction, which will cause the pin 6 to tilt and affect the stability of the pin 6 and the foundation pit ground.

[0027] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foundation pit support device for geotechnical engineering, comprising a base (1), characterized in that: The two ends of the base (1) are provided with a first sliding support plate (2) and a second sliding support plate (3) which can be positioned and slid to both sides according to the width of the foundation pit; the first sliding support plate (2) and the second sliding support plate (3) are respectively fixedly connected to a support frame (4); the support frame (4) is provided with a fixed-point support structure whose support position can be adjusted according to the depth of the foundation pit; the fixed-point support structure includes a blocking plate (5) which can move vertically along the side wall of the foundation pit; the two ends of the first sliding support plate (2) and the second sliding support plate (3) are respectively provided with a fixed structure matched with the fixed-point support structure; the fixed structure includes a pin (6) whose inclination angle can be adjusted according to the position of the blocking plate (5) on the side wall of the foundation pit for adapting to the force bearing position.

2. The foundation pit support equipment for geotechnical engineering according to claim 1, characterized in that: The inner walls of the first sliding support plate (2) and the second sliding support plate (3) are respectively slidably connected to the two sides of the base (1), and fixing bolts (40) corresponding to the base (1) are respectively provided at both ends of the first sliding support plate (2) and the second sliding support plate (3).

3. The foundation pit support equipment for geotechnical engineering according to claim 1, characterized in that: The fixed-point support structure further comprises a positioning pin barrel (37) fixedly arranged on the base (1), a screw rod (11) being rotatably connected in the positioning pin barrel (37), a sliding block (8) being arranged between the support frames (4), a first fixed axis block (12) being arranged at one end of the sliding block (8), a screw barrel (14) being threadedly connected to the screw rod (11) being fixedly connected to the inner wall of the first fixed axis block (12), sliding plates (9) being slidably connected to the inner walls of both sides of the sliding block (8), a mounting block (10) fixedly connected to the sliding plate (9) being arranged in the support frame (4), sliding pins (16) being slidably connected to the inner wall of the support frame (4) being arranged at both ends of the mounting block (10), and a spur rack (15) being further arranged on the mounting block (10).

4. The foundation pit support equipment for geotechnical engineering according to claim 3, characterized in that: The upper and lower ends of the support frame (4) are rotatably connected to a first transmission rod (36) and a second transmission rod (35), respectively; the first transmission rod (36) and the second transmission rod (35) are respectively fixedly connected to a first rotating frame (18) and a second rotating frame (17), respectively; the first rotating frame (18) and the second rotating frame (17) are arranged in parallel; the rotation axis points of the first rotating frame (18) and the second rotating frame (17) on the support frame (4) are arranged in parallel with the vertical direction of the support frame (4); the first transmission rod (36) is fixedly connected to a spur gear (19) meshing with the spur rack (15); one end of the first rotating frame (18) is rotatably connected to a meshing gear (24), and the two ends of the meshing gear (24) are respectively coaxially fixedly connected to an active A rotating rod (23), one end of the second rotating frame (17) is fixedly connected to a fixed gear (25) meshing with the meshing gear (24), and both ends of the fixed gear (25) are coaxially rotatably connected to auxiliary rotating rods (21) arranged parallel to the active rotating rod (23), and both ends of the meshing gear (24) and the fixed gear (25) are respectively provided with fixed rods (20), and the fixed rods (20) are arranged parallel to the rotating shaft points of the first rotating frame (18) and the second rotating frame (17) on the support frame (4), and the active rotating rod (23) and the auxiliary rotating rod (21) are respectively rotatably connected to a transverse rod (22) parallel to the fixed rod (20), and the transverse rod (22) is provided with a fixed support plate (7) fixedly connected to the blocking plate (5).

5. The foundation pit support equipment for geotechnical engineering according to claim 4, characterized in that: The fixed structure also includes a rotating disk (26) fixedly connected to the second transmission rod (35); a first fixing pin (27) is arranged at a non-center portion of the rotating disk (26); two ends of the first sliding support plate (2) and the second sliding support plate (3) are respectively provided with a sliding groove rod (28); a first sliding groove (32) and a second sliding groove (38) are respectively provided on the sliding groove rod (28); a limiting block (34) is arranged at the lower end of the sliding groove rod (28); the first fixing pin (27) is arranged in the first sliding groove (32); the first sliding support plate The first and second sliding support plates (2) and the second sliding support plate (3) are respectively provided with rotating frame blocks (29) corresponding to the sliding groove rod (28); the middle end of the rotating frame block (29) is fixedly connected with a rotating column (31); the upper end of the rotating frame block (29) is fixedly connected with a second fixing pin (33) arranged in parallel with the vertical axis of the rotating column (31); the second fixing pin (33) is arranged in the second sliding groove (38); the rotating frame block (29) is fixedly connected with a second fixed axis block (30); the second fixed axis block (30) is provided with the inserted pin (6).

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