Recyclable power transmission and transformation project shallow foundation pit supporting device

Abstract

The invention belongs to the technical field of foundation pit supporting, and particularly relates to a recoverable power transmission and transformation project shallow foundation pit supporting device which comprises a base plate, a plurality of fixing holes are formed in the base plate, a first fixing mechanism used for fixing the base plate to the edge of a pit is arranged in the fixing holes in a penetrating mode, and a protective plate is hinged to one end of the base plate. An adjusting mechanism used for controlling the rotating angle of the protective plate is arranged on the base plate, and a second fixing mechanism used for fixing the protective plate to the side wall of the foundation pit is arranged on the protective plate. Compared with a cement pouring supporting mode, the supporting device can be repeatedly used and is more convenient to mount and dismount, the defect that a supporting mechanism is transversely arranged in a traditional foundation pit, and foundation pit operation is hindered is overcome, and the supporting reliability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit support, and in particular relates to a recyclable shallow foundation pit support device for power transmission and transformation engineering. Background Art

[0002] Traditional methods of shallow foundation pit support include steel sheet piles, wooden piles, cement soil walls, etc. Although these methods can meet the needs of foundation pit support to a certain extent, they have disadvantages such as long construction period, high material consumption, and difficulty in disassembly.

[0003] Therefore, it is necessary to design a recyclable shallow foundation pit support device for power transmission and transformation projects to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide a recyclable shallow foundation pit supporting device for power transmission and transformation engineering to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides a recyclable shallow foundation pit support device for power transmission and transformation projects, including a base plate, a plurality of fixing holes are provided on the base plate, a fixing mechanism 1 for fixing the base plate on the pit edge is penetrated in the fixing holes, a guard plate is hinged at one end of the base plate, an adjustment mechanism for controlling the rotation angle of the guard plate is provided on the base plate, and a fixing mechanism 2 for fixing the guard plate on the side wall of the foundation pit is provided on the guard plate.

[0006] Preferably, the adjustment mechanism includes a pad block connected to the top of the base plate, a plurality of hydraulic rods are connected to the pad block, a plurality of support rods are connected to the side of the pad block close to the guard plate, the support rods are arranged corresponding to the hydraulic rods, a connecting rod is hinged on the support rod, one end of the connecting rod is hinged to the telescopic end of the hydraulic rod, and the other end of the connecting rod is hinged to the guard plate.

[0007] Preferably, the fixing mechanism 1 comprises an anchor rod body, the interior of the anchor rod body is a hollow structure, and one end of the anchor rod body is set as a tip, a clamping assembly is arranged at the tip, and a driving assembly for driving the clamping assembly to perform clamping is arranged in the cavity of the anchor rod body.

[0008] Preferably, the clamping assembly includes two fixed brackets connected at the tip, and the two fixed brackets are symmetrically arranged on both sides of the anchor rod body. A sliding groove 2 is opened on the anchor rod body, and a slider is slidably connected in the sliding groove 2. Both ends of the slider extend out of the side wall of the anchor rod body and are hinged to one end of the connecting rod 2. One end of the connecting rod 1 is hinged to the fixed bracket, and the other end of the connecting rod 1 is hinged to the other end of the connecting rod 2.

[0009] Preferably, the driving assembly comprises a rod body, a pressure block is fixedly connected to one end of the anchor rod body away from its tip, the rod body is threadedly connected to the pressure block, and the rod body extends into the cavity of the anchor rod body and is in frictional contact with the slider.

[0010] Preferably, a spring is provided in the cavity of the anchor rod body, and two ends of the spring are respectively fixedly connected to the slider and a side of the anchor rod body close to the tip.

[0011] Preferably, the second fixing mechanism includes a box body fixedly connected to the guard plate, two brackets are connected in the box body, a worm is rotatably connected between the two brackets, one end of the worm passes through the side wall of the box body and is transmitted and matched with a driving member, a plurality of worm wheels are rotatably connected to the box body, the plurality of worm wheels are all meshed with the worm, a through hole is opened on the worm wheel, a limit block is connected to the inner wall of the through hole, and an anchor is connected to the limit block for sliding limit.

[0012] Preferably, the anchoring member comprises an anchor rod, a slide groove 1 is provided on the outer wall of the anchor rod along the axial direction of the anchor rod, the limit block is slidably fitted in the slide groove 1, and a spiral leaf is wound around the anchor rod.

[0013] Compared with the prior art, the present invention has the following advantages and technical effects:

[0014] The present invention provides a recyclable shallow foundation pit support device for power transmission and transformation projects. A fixing mechanism is provided to pass through a fixing hole and inserted into a hole drilled in advance on the pit edge, and a base plate is firmly fixed on the pit edge. Then, a rotation angle of a guard plate 2 is adjusted by a setting adjustment mechanism, and the guard plate 2 is made to fit on the side wall of the pit foundation. The guard plate 2 is firmly fixed on the side wall of the pit foundation by a setting fixing mechanism, thereby achieving support for the pit foundation soil blocks.

[0015] Compared with the support method of cement pouring, the present invention can be used repeatedly, is more convenient to install and disassemble, and also avoids the disadvantage of the traditional foundation pit horizontally setting a support mechanism, which hinders the foundation pit operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0017] Figure 1 This is a schematic structural diagram of a recyclable shallow foundation pit support device for power transmission and transformation engineering proposed by the present invention;

[0018] Figure 2It is a structural schematic diagram of the fixing mechanism 1 in the present invention;

[0019] Figure 3 It is a structural schematic diagram of the fixing mechanism 2 in the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the anchor member in the present invention;

[0021] Among them: 1. Base plate; 2. Guard plate; 3. Fixing hole; 4. Hydraulic rod; 5. Cushion block; 6. Support rod; 7. Connecting rod; 8. Fixing rod; 9. Box; 10. Bracket; 11. Worm; 12. Worm wheel; 13. Through hole; 14. Limit block; 15. Anchor rod; 16. Slide groove 1; 17. Spiral blade; 18. Fixed bracket; 19. Connecting rod 1; 20. Connecting rod 2; 21. Sliding block; 22. Spring; 23. Slide groove 2; 24. Rod body; 25. Pressure block; 26. Anchor rod body. DETAILED DESCRIPTION

[0022] 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.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] The technical terms in the embodiments are described below:

[0025] Transmission and transformation engineering is a general term for transmission line construction and transformer installation engineering. Its main function is to build a transmission line from the starting point of electric energy (power plant) to the end user (residential or industrial user), stably and efficiently transmit electric energy to ensure that people can use electricity safely and stably in their production and life. The following is a detailed introduction to transmission and transformation engineering:

[0026] 1. Definition and Classification

[0027] Definition: Power transmission and transformation projects achieve long-distance transmission and distribution of electric energy by constructing transmission lines and installing equipment such as transformers.

[0028] Classification: According to the voltage level and transmission mode, power transmission and transformation projects can be divided into AC power transmission and transformation projects and DC power transmission projects. AC power transmission and transformation projects include transmission lines and substations (or switch stations, series compensation stations), while DC power transmission projects include transmission lines, converter stations and grounding electrode systems.

[0029] 2. Characteristics and Importance

[0030] Features: The higher the voltage level of the power transmission and transformation project, the greater the power transmitted and the longer the transmission distance. This makes the ultra-high voltage power transmission and transformation project play an important role in power transmission.

[0031] Importance: Power transmission and transformation projects are an important part of the power system, which is related to the stable transmission and distribution of electric energy. Once a power transmission and transformation project fails, it will seriously affect the normal operation of the power system and even cause serious consequences such as large-scale power outages.

[0032] 3. Technology Application and Development Trend

[0033] Technology Application:

[0034] Transformer installation technology: Transformers are the core equipment for energy conversion and transmission in power grids, and their installation quality is directly related to the safe and stable operation of power grids. Therefore, special processes and transportation equipment are required during the installation process to ensure that the transformer can be installed smoothly and accurately.

[0035] Protection technology: In high-voltage transmission lines, the installation of lightning protection wires, lightning rods and other equipment can effectively prevent lightning from damaging the lines. In key locations such as converter stations, lightning arresters, grounding grids and other protective measures can ensure the safe operation of equipment under severe weather conditions such as lightning.

[0036] Intelligent power transmission and transformation technology: With the continuous development of science and technology, the application of intelligent power transmission and transformation technology in power transmission and transformation projects is becoming more and more extensive. By introducing computer, communication and automation technology, real-time monitoring, analysis and control of the power grid operation status are realized.

[0037] Development Trends:

[0038] High-voltage direct current transmission technology: It has attracted much attention for its high stability and high capacity. This technology can achieve long-distance, large-capacity, and low-loss power transmission, which is of great significance for solving the problem of uneven energy distribution and load centers far away from energy bases in my country.

[0039] Digital transformation: With the advancement of digital transformation, power transmission and transformation projects will pay more attention to the application of intelligent, automated and digital technologies. This will help improve the operating efficiency and reliability of the power grid and reduce operation and maintenance costs.

[0040] IV. Construction Management and Challenges

[0041] Construction management: During the construction of power transmission and transformation projects, a large number of engineering projects need to be carried out. Therefore, as a power construction department, it is necessary to strengthen the management of the construction site to ensure the safe and smooth progress of power transmission and transformation construction.

[0042] Challenges:

[0043] Irregular behavior of construction companies: such as subcontracting projects, taking on projects without a license or bypassing the level of the project management, etc. These problems may lead to uneven construction quality and make it difficult to ensure project quality.

[0044] Frequent extreme weather events: This poses a threat to the safe and stable operation of the power grid. Therefore, it is necessary to strengthen the disaster prevention and mitigation capabilities of the power grid and improve the resilience of the power system.

[0045] Urgent need for technology upgrade and transformation: With the continuous development of science and technology, some old equipment is no longer suitable for the current development of the power grid. Therefore, it is necessary to actively promote the upgrade and transformation of power transmission and transformation equipment.

[0046] Foundation pit support refers to the work of taking a series of measures to support and reinforce the foundation pit in order to prevent earthwork collapse and ensure construction safety during the construction process. The main purpose of foundation pit support is to ensure the safety of underground structure construction and the surrounding environment of the foundation pit.

[0047] The main functions of foundation pit support include water retaining, soil retaining, load unloading and preventing road deformation. Foundation pit support is a support, reinforcement and protection measure for the side walls and surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. It ensures the stability of the foundation pit and construction safety through temporary support, reinforcement and protection measures, as well as groundwater control.

[0048] Foundation pit support engineering is usually applicable to foundation pit (trench) support with excavation depth exceeding 3 meters (including 3 meters) or complicated geological conditions and surrounding environment. Special attention should be paid to foundation pit support engineering with excavation depth exceeding 5 meters (including 5 meters) or complicated geological conditions, surrounding environment and underground pipelines, or affecting the safety of adjacent buildings.

[0049] The design and construction of foundation pit support must comply with the "Technical Code for Building Foundation Pit Support" JGJ120-2012 to ensure its effectiveness and safety.

[0050] The principle of hydraulic rod is mainly based on Pascal's law, which converts hydraulic energy into mechanical energy through the hydraulic system to achieve the function of driving or controlling the load.

[0051] The hydraulic rod is mainly composed of a piston, a cylinder and hydraulic oil. When the hydraulic oil generates pressure under the action of the hydraulic pump, the hydraulic oil will flow into the hydraulic cylinder or hydraulic motor along the pipeline to push the piston or blade to move. The movement of the piston or blade converts hydraulic energy into mechanical energy, thereby driving or controlling the load. The working medium of the hydraulic rod is usually oil, and the internal air pressure presets the tension to support the load, such as the engine cover or trunk lid.

[0052] The principle of hydraulic rods also involves the pressure characteristics of liquids, that is, the pressure of a liquid is equal to the applied pressure divided by the area under force. Therefore, under the same applied force, the smaller the area under force, the greater the pressure of the liquid. This means that a small piston can give a large piston a huge force with just a slight force.

[0053] Hydraulic levers are widely used and are often used in light and powerful drive devices, such as automobiles, mechanical equipment, etc. They have reliable action, good operating performance, and can effectively transmit and control energy.

[0054] The main function of worm gear transmission is to transmit motion and power by reducing speed. Worm gear transmission consists of a worm and a worm wheel, and is usually used for transmission between staggered shafts. It has the characteristics of large transmission ratio and compact structure. In addition, worm gear transmission also has self-locking property. When the lead angle of the worm is less than the equivalent friction angle between the meshing gear teeth, the mechanism has self-locking property, which means that it can achieve reverse self-locking, that is, only the worm can drive the worm wheel, but not the worm wheel, which plays a role of safety protection in lifting machinery.

[0055] Reference Figures 1 to 4 As shown, the present invention provides a recyclable shallow foundation pit support device for power transmission and transformation projects, including a base plate 1, a plurality of fixing holes 3 are provided on the base plate 1, a fixing mechanism 1 for fixing the base plate 1 on the pit edge is penetrated in the fixing holes 3, a guard plate 2 is hinged at one end of the base plate 1, an adjustment mechanism for controlling the rotation angle of the guard plate 2 is provided on the base plate 1, and a fixing mechanism 2 for fixing the guard plate 2 on the side wall of the foundation pit is provided on the guard plate 2.

[0056] Through the setting of the fixing mechanism, the fixing hole 3 is passed through and inserted into the hole drilled in advance on the edge of the pit, and the base plate 1 is firmly fixed on the edge of the pit. Then, the rotation angle of the guard plate 2 is adjusted through the setting of the adjusting mechanism, and the guard plate 2 is made to fit on the side wall of the pit foundation. Through the setting of the fixing mechanism, the guard plate 2 is firmly fixed on the side wall of the pit foundation, thereby realizing the support of the pit foundation soil.

[0057] Compared with the support method of cement pouring, the present invention can be used repeatedly, is more convenient to install and disassemble, and also avoids the disadvantage of the traditional foundation pit horizontally setting a support mechanism, which hinders the foundation pit operation.

[0058] Furthermore, the adjustment mechanism includes a pad block 5 connected to the top of the base plate 1, a plurality of hydraulic rods 4 are connected to the pad block 5, a plurality of support rods 6 are connected to the side of the pad block 5 close to the guard plate 2, the support rods 6 are arranged corresponding to the hydraulic rods 4, a connecting rod 7 is hinged on the support rod 6, one end of the connecting rod 7 is hinged to the telescopic end of the hydraulic rod 4, and the other end of the connecting rod 7 is hinged to the guard plate 2.

[0059] In this embodiment, a fixing rod 8 is vertically connected to the guard plate 2 , and the connecting rod 7 is hinged to the fixing rod 8 .

[0060] Through the telescopic end of the hydraulic rod 4, one end of the connecting rod 7 is pressed, and a fulcrum is formed through the set support rod 6, and the connecting rod 7 is rotated on the support rod 6. The other end of the connecting rod 7 is provided with the guard plate 2 for rotation through the fixed rod 8, and the soil blocks on the side wall of the foundation pit can be squeezed through the guard plate 2.

[0061] Furthermore, the fixing mechanism 1 includes an anchor rod body 26, the interior of the anchor rod body 26 is a cavity structure, and one end of the anchor rod body 26 is set as a tip, a clamping assembly is arranged at the tip, and a driving assembly for driving the clamping assembly to perform clamping is arranged in the cavity of the anchor rod body 26.

[0062] Furthermore, the clamping assembly includes two fixed brackets 18 connected at the tip, and the two fixed brackets 18 are symmetrically arranged on both sides of the anchor rod body 26. A slide groove 23 is opened on the anchor rod body 26, and a slider 21 is slidably connected in the slide groove 23. Both ends of the slider 21 extend out of the side wall of the anchor rod body 26 and are hinged to one end of a connecting rod 20. One end of a connecting rod 19 is hinged to the fixed bracket 18, and the other end of the connecting rod 19 is hinged to the other end of the connecting rod 20.

[0063] The driving assembly pushes the slider 21 to slide along the second slide groove 23 and move closer to the tip of the anchor rod body 26. The second slide groove 23 drives the second connecting rod 20 to rotate, and the second connecting rod 20 drives the first connecting rod 19 to rotate, so that the angle between the second connecting rod 20 and the first connecting rod 19 gradually decreases, and the hinge point between the second connecting rod 20 and the first connecting rod 19 gradually moves away from the anchor rod body 26, and then penetrates into the soil on the inner wall of the hole to achieve compression and fixation.

[0064] Furthermore, the driving assembly includes a rod body 24 , a pressure block 25 is fixedly connected to one end of the anchor rod body 26 away from its tip, the pressure block 25 is threadedly connected to the rod body 24 , and the rod body 24 extends into the cavity of the anchor rod body 26 and is in frictional contact with the slider 21 .

[0065] The pressing assembly is driven by rotating the rod body 24 to make the pressing slider 21 approach the tip of the anchor rod body 26 .

[0066] Furthermore, a spring 22 is provided in the cavity of the anchor rod body 26 , and two ends of the spring 22 are respectively fixed to the slider 21 and one side of the anchor rod body 26 close to the tip.

[0067] In order to facilitate the insertion of the anchor rod body 26 into the hole pre-punched on the pit edge, the rebound force of the spring 22 causes the slider 21 to move away from the tip of the anchor rod body 26, so that the angle between the connecting rod 19 and the connecting rod 20 is close to 180°.

[0068] Furthermore, the second fixing mechanism includes a box body 9 fixedly connected to the guard plate 2, two brackets 10 are connected inside the box body 9, a worm 11 is rotatably connected between the two brackets 10, one end of the worm 11 passes through the side wall of the box body 9 and is transmitted and matched with a driving member, a plurality of worm wheels 12 are rotatably connected to the box body 9, the plurality of worm wheels 12 are all meshed with the worm 11, a through hole 13 is opened on the worm wheel 12, a limit block 14 is connected to the inner wall of the through hole 13, and an anchor is connected to the limit block 14 for sliding limit.

[0069] In this embodiment, the driving member is a motor, and the output shaft of the motor is connected to a driving sprocket. One end of the worm 11 extending out of the box 9 is connected to a driven sprocket, which is driven by a chain transmission, thereby driving the two worm wheels 12 to rotate synchronously. The rotating worm wheels 12 drive the anchor to penetrate the side wall of the pit foundation and are fastened to the guard plate 2 by nuts.

[0070] Furthermore, the anchoring member includes an anchor rod 15 , a slide groove 16 is provided on the outer wall of the anchor rod 15 along the axial direction of the anchor rod 15 , the limit block 14 is slidably fitted in the slide groove 16 , and a spiral leaf 17 is wound around the anchor rod 15 .

[0071] By setting the limit block 14 and the sliding limit of the slide groove 16, the rotating worm gear 12 drives the anchor rod 15 to rotate, and the rotating anchor rod 15 drives the spiral blade 17 to rotate to drill into the side wall of the pit foundation, and the fastening nut is threadedly connected to the anchor rod 15 to fix the guard plate 2.

[0072] The recyclable shallow foundation pit support device for power transmission and transformation engineering provided by the present invention has a working principle as follows: when in use, the base plate 1 is placed on the edge of the excavated pit. According to the length of the pit edge, a plurality of the support devices can be arranged side by side. A drilling tool is used to align the fixing hole 3 and perform drilling. The tip of the anchor rod body 26 is passed downward through the fixing hole 3, and the angle between the connecting rod 19 and the connecting rod 20 is made close to 180°. Finally, the anchor rod body 26 is inserted into the drilled hole, and the rod body 24 is rotated to press the slider 21 toward the tip of the anchor rod body 26. When the slider 21 approaches, the connecting rod 20 is pulled to rotate, and the connecting rod 20 drives the connecting rod 1 19 to rotate, so that the angle between the connecting rod 20 and the connecting rod 1 19 is gradually reduced, so that the hinge point between the connecting rod 20 and the connecting rod 1 19 is gradually away from the anchor rod body 26, and then penetrates into the soil of the inner wall of the hole to achieve compression and fixation. After the compression is completed, the outer end of the rod body 24 that leaks out of the substrate 1 is threadedly connected to the nut, so that the nut is crimped on the substrate 1 to achieve the fixation of the substrate 1. Subsequently, the two hydraulic rods 4 are started, and the extension end of the hydraulic rod 4 is extended to One end of the top-pressing connecting rod 7 is formed as a fulcrum through the support rod 6, and the connecting rod 7 is rotated on the support rod 6. The other end of the connecting rod 7 drives the guard plate 2 to rotate through the fixing rod 8, and the guard plate 2 is squeezed on the soil block on the side wall of the foundation pit. The anchor is passed through the outer wall of the box body 9 and inserted into the through hole 13, so that the limit block 14 slides into the slide groove 16 on the anchor rod 15, and the worm 11 is driven to rotate through the driving member, and the worm 11 drives the two worm wheels 12 to rotate synchronously, and the anchor rod 15 is driven to rotate through the rotating worm wheel 12. The anchor rod 15 drives the spiral blade 17 to rotate and drill into the side wall of the pit foundation. Then the fastening nut is threadedly connected to the anchor rod 15 to fix the guard plate 2. Repeat the above operations to complete the support of the pit foundation device. When dismantling the device, it is necessary to note that the nut on the anchor rod 15 must be removed first, and then the hydraulic rod 4 is controlled to shrink. The guard plate 2 rotates upward under the drive of the connecting rod 7, so that the box 9 and the through hole 13 are separated from the anchor rod 15, and then the anchor rod 15 is driven to rotate in the opposite direction with the help of tools to remove the anchor from the side wall of the pit foundation.

[0073] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0074] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A recyclable shallow foundation pit support device for power transmission and transformation engineering, characterized in that: The invention comprises a base plate (1), a plurality of fixing holes (3) are provided on the base plate (1), a fixing mechanism (1) for fixing the base plate (1) on the pit edge is provided in the fixing hole (3), a guard plate (2) is hingedly connected to one end of the base plate (1), an adjustment mechanism for controlling the rotation angle of the guard plate (2) is provided on the base plate (1), and a fixing mechanism (2) for fixing the guard plate (2) on the side wall of the foundation pit is provided on the guard plate (2).

2. The recyclable shallow foundation pit support device for power transmission and transformation engineering according to claim 1 is characterized in that: The adjustment mechanism comprises a cushion block (5) connected to the top of the base plate (1), a plurality of hydraulic rods (4) being connected to the cushion block (5), a plurality of support rods (6) being connected to a side of the cushion block (5) close to the guard plate (2), the support rods (6) being arranged corresponding to the hydraulic rods (4), a connecting rod (7) being hinged to the support rod (6), one end of the connecting rod (7) being hinged to the telescopic end of the hydraulic rod (4), and the other end of the connecting rod (7) being hinged to the guard plate (2).

3. The recyclable shallow foundation pit support device for power transmission and transformation engineering according to claim 1 is characterized in that: The fixing mechanism 1 comprises an anchor rod body (26), the interior of the anchor rod body (26) is a hollow structure, and one end of the anchor rod body (26) is set as a tip, a clamping assembly is arranged at the tip, and a driving assembly for driving the clamping assembly to perform clamping is arranged in the hollow cavity of the anchor rod body (26).

4. The recyclable shallow foundation pit support device for power transmission and transformation engineering according to claim 3 is characterized in that: The clamping assembly comprises two fixed brackets (18) connected at the tip, the two fixed brackets (18) are symmetrically arranged on both sides of the anchor rod body (26), the anchor rod body (26) is provided with a second slide groove (23), a slider (21) is slidably connected in the second slide groove (23), both ends of the slider (21) extend out of the side wall of the anchor rod body (26) and are hinged to one end of the second connecting rod (20), one end of the first connecting rod (19) is hinged to the fixed bracket (18), and the other end of the first connecting rod (19) is hinged to the other end of the second connecting rod (20).

5. The recyclable shallow foundation pit support device for power transmission and transformation engineering according to claim 4 is characterized in that: The driving assembly comprises a rod body (24), a pressure block (25) is fixedly connected to one end of the anchor rod body (26) away from its tip, the pressure block (25) is threadedly connected to the rod body (24), and the rod body (24) extends into the cavity of the anchor rod body (26) and is in frictional contact with the slider (21).

6. The recyclable shallow foundation pit support device for power transmission and transformation engineering according to claim 5 is characterized in that: A spring (22) is arranged in the cavity of the anchor rod body (26), and two ends of the spring (22) are respectively fixedly connected to the slider (21) and a side of the anchor rod body (26) close to the tip.

7. The recyclable shallow foundation pit support device for power transmission and transformation engineering according to claim 1 is characterized in that: The second fixing mechanism comprises a box body (9) fixedly connected to the guard plate (2), two brackets (10) are connected inside the box body (9), a worm (11) is rotatably connected between the two brackets (10), one end of the worm (11) passes through the side wall of the box body (9) and is transmission-coordinated with a driving member, a plurality of worm wheels (12) are rotatably connected to the box body (9), the plurality of worm wheels (12) are all meshed with the worm (11), a through hole (13) is provided on the worm wheel (12), a limit block (14) is connected to the inner wall of the through hole (13), and an anchor is slidably connected to the limit block (14).

8. The recyclable shallow foundation pit support device for power transmission and transformation engineering according to claim 7 is characterized in that: The anchoring piece comprises an anchor rod (15), a slide groove (16) is provided on the outer wall of the anchor rod (15) along the axial direction of the anchor rod (15), the limit block (14) is slidably fitted in the slide groove (16), and a spiral leaf (17) is wound around the anchor rod (15).

Images