A collapsible loess subgrade improvement device

Abstract

The present invention belongs to the technical field of subgrade improvement, and particularly relates to a collapsible loess subgrade improvement device, which includes a mobile transport vehicle. A mobile seat is fixedly connected to the front end of the mobile transport vehicle. Support rollers are connected to both opposite sides of the lower end of the mobile seat through wheel axles. A supporting plate is fixedly connected to the front end of the mobile seat, and a lifting driving mechanism is fixedly installed on the front side of the upper end of the supporting plate. The present invention ensures that the addition of sodium silicate solution is within a suitable range, reduces the waste of chemical solution, and can ensure the improvement quality of the collapsible loess subgrade, ensures the stability of the detection of the collapsibility degree of loess each time, and further ensures the precise control of the injection accuracy of the chemical solution. It can automatically perform chemical reinforcement operations on the loess subgrade at the current position according to the moving distance, with a high degree of automation, ensures the comprehensiveness of chemical reinforcement, avoids the problem of easy insufficient reinforcement, and has a higher reinforcement quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of subgrade improvement, and particularly relates to a collapsible loess subgrade improvement device. Background Art

[0002] The collapsible characteristics of collapsible loess foundation will cause varying degrees of harm to structures, resulting in significant settlement, cracking, and inclination of the structures, and even seriously affecting their safety and use. Therefore, when building structures such as bridges and culverts in loess areas, it is necessary to have a reliable determination method and a comprehensive understanding of the collapsible loess foundation, and take correct engineering measures to prevent or eliminate its collapsibility.

[0003] Currently, most collapsible loess accidents are treated by chemical reinforcement methods. Sodium silicate chemical solution is injected into the foundation soil, and through chemical reactions, gelling substances are generated or the surfaces of soil particles are activated, and they are cemented and solidified at the contact points to enhance the connection between soil particles and improve the mechanical strength of the soil mass.

[0004] Currently, the injection of sodium silicate chemical solution is mostly adjusted according to past experience for the injection volume. The judgment of the injection volume is not accurate enough. When the injection volume is too much, due to saturation, the mechanical strength of the soil mass cannot be further improved, resulting in waste of chemical solution and a significant increase in treatment costs. When the injection volume is too little, it will cause insufficient mechanical strength of the soil mass, affecting the improvement quality of the collapsible loess subgrade, making it very inconvenient in the improvement work of the collapsible loess subgrade, and it is difficult to guarantee the improvement quality.

[0005] Therefore, we propose a collapsible loess subgrade improvement device to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a collapsible loess subgrade improvement device for the above problems.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions: A collapsible loess subgrade improvement device includes a mobile transport vehicle. A mobile seat is fixedly connected to the front end of the mobile transport vehicle. Support rollers are connected to the opposite sides of the lower end of the mobile seat through wheel axles. A supporting plate is fixedly connected to the front end of the mobile seat. A lifting drive mechanism is fixedly installed on the front side of the upper end of the supporting plate. The output end of the lifting drive mechanism is fixedly connected to a self-checking mechanism for the collapsibility degree of loess. A cleaning mechanism for preventing errors is also fixedly installed on the front side of the upper end of the supporting plate and is located on one side of the self-checking mechanism for the collapsibility degree of loess. A chemical reinforcement mechanism is fixedly installed on the upper end of the mobile seat. A mobile distance detection feedback trigger mechanism connected to the wheel axle is also fixedly installed on the outer wall of the mobile seat.

[0008] In the above collapsible loess subgrade improvement device, the lifting drive mechanism includes an L-shaped vertical plate fixedly connected to the upper end of the supporting plate. One side of the lower end of the horizontal part of the L-shaped vertical plate is rotatably connected to the upper end of the supporting plate through a bearing with a reciprocating screw rod. An elevating screw barrel is threadedly sleeved on the rod wall of the reciprocating screw rod. A bidirectional conversion drive mechanism connected to the upper end of the reciprocating screw rod is fixedly installed on the upper end of the horizontal part of the L-shaped vertical plate. A PLC controller is also fixedly installed on the outer wall of the vertical part of the L-shaped vertical plate.

[0009] In the above collapsible loess subgrade improvement device, the self-checking mechanism for the collapsibility degree of loess includes a fixed shell fixedly connected to one side of the elevating screw barrel. The side of the fixed shell away from the elevating screw barrel is open. On the inner walls of the front and rear opposite sides at the lower end of the fixed shell, multiple guiding slide rods are fixedly connected. The same stress block is slidably sleeved outside the multiple guiding slide rods. One end of the stress block extends out of the fixed shell and is fixedly connected to a fixed cylinder. A self-checking rod is rotatably sleeved in the fixed cylinder through a bearing. A strip-shaped through hole for the lower end of the self-checking rod to extend out is opened on the surface of the supporting plate. Multiple reset springs respectively sleeved outside the multiple guiding slide rods are fixedly connected between the rear inner wall of the fixed shell and the stress block. A trigger shell is fixedly connected to the top of the front inner wall of the fixed shell. Two through holes are opened on the side wall of the trigger shell close to the stress block, and push rods are movably inserted in the corresponding through holes. The ends of the two push rods outside the trigger shell are fixedly connected to the same push plate. Damping rubber sleeves that abut against the push rods are fixedly connected to the inner walls of the trigger shell corresponding to the through holes. The ends of the two push rods inside the trigger shell are fixedly connected to the same adjusting block. A conductive contact piece is fixedly connected to the upper end of the adjusting block. A resistance rod in electrical contact with the conductive contact piece is fixedly installed on the top inner wall of the trigger shell. A reset permanent magnet block is fixedly connected to the side wall of the adjusting block. A reset electromagnetic block opposite to the position of the reset permanent magnet block is fixedly connected to one side of the inner wall of the trigger shell.

[0010] In the above collapsible loess subgrade improvement device, the error-proof cleaning mechanism includes a supporting plate fixedly connected to the upper end of the supporting plate. Multiple through holes are opened on the side wall of the supporting plate, and push rods are movably inserted in the corresponding through holes. The ends of the multiple push rods close to the self-checking rod are fixedly connected to the same arc-shaped cleaning scraper with a hollow structure. A wiping cleaning pad is fixedly connected to the inner wall of the arc-shaped cleaning scraper. Multiple water permeable holes communicating with the wiping cleaning pad are opened inside the arc-shaped cleaning scraper. A water supply pipe is fixedly connected to the upper end of the arc-shaped cleaning scraper. A water supply pump is arranged on the water supply pipe. The water supply pump is fixed at the lower end of the horizontal part of the L-shaped vertical plate. A retaining plate is fixedly connected to the rear end of the push rod. A return spring sleeved outside the push rod is fixedly connected between the retaining plate and the supporting plate. Multiple thrust electromagnetic plates are fixedly connected to the side wall of the supporting plate. A thrust permanent magnet plate corresponding to the position of the thrust electromagnetic plate is fixedly connected to the rear side of the arc-shaped cleaning scraper.

[0011] In the above-mentioned device for improving collapsible loess roadbed, the chemical reinforcement mechanism includes a static pressure component fixedly connected to the upper end of the mobile seat, the output end of the static pressure component is fixedly connected to a connecting block, one end surface of the connecting block is fixedly sleeved with a filling pipe, the pipe wall of the filling pipe is evenly provided with a plurality of drug outlet holes, and a one-way valve is provided in the corresponding drug outlet holes, the surface of the supporting plate is provided with a through hole for the lower end of the filling pipe to extend out, a drug storage cavity is provided in the mobile transport vehicle, the upper end of the filling pipe is fixedly connected to a dosing pipe, one end of the dosing pipe extends into the drug storage cavity, a dosing pump is provided on the dosing pipe, the dosing pump is fixedly connected to the upper end of the mobile transport vehicle, and the upper end of the static pressure component is fixedly connected to a guide wheel for transferring the dosing pipe.

[0012] In the above-mentioned device for improving collapsible loess roadbed, the moving distance detection feedback trigger mechanism includes a reduction gear box fixedly connected to the outer wall of the moving seat, the input end of the reduction gear box and the shaft wall of the wheel axle are transmission-connected through a sprocket assembly, one side of the reduction gear box is also fixedly connected to an insulating circular shell, the output end of the reduction gear box extends into the insulating circular shell and is fixedly connected to an extension rod, one end of the extension rod is fixedly connected to an arc-shaped pressing block, one side of the inner wall of the insulating circular shell is also fixedly connected to a normally open press switch, and the outer wall of the reduction gear box is also fixedly installed with an audible and visual alarm.

[0013] The transmission mechanism is a pair of pair of pair of pair of opposite ends of the transmission mechanism, and the pair of pair of opposite ends is equipped with a pair of opposite ends of the transmission mechanism, and the pair of opposite ends of the transmission mechanism is equipped with a pair of opposite ends.

[0014] In the above-mentioned device for improving collapsible loess roadbed, a plurality of limit sliders are fixedly connected to the outer wall of the lifting screw barrel close to the L-shaped vertical plate, and a limit sliding groove is provided on the vertical side wall of the L-shaped vertical plate to match and slide with the limit slider.

[0015] Compared with the existing technology, the beneficial effects of the present invention are:

[0016] 1. By setting up a mobile transport vehicle, a movable seat, a wheel axle, support rollers, a supporting plate, a lifting drive mechanism, a self-checking mechanism for the collapsibility degree of loess, and a bidirectional conversion drive mechanism, the specific collapsibility degree of the collapsible loess subgrade can be self-checked, and the detected data information is fed back to the subsequent chemical reinforcement operation of the actual sodium silicate solution. The self-adjustment of the addition amount of the sodium silicate solution is carried out according to the collapsibility degree of the loess at the current position, ensuring that the addition of the sodium silicate solution is within a suitable range, reducing the waste of chemical solutions, and ensuring the improvement quality of the collapsible loess subgrade.

[0017] 2. By setting up an anti-error cleaning mechanism, the dirt on the surface of the self-checking rod can be automatically cleaned every time the self-checking operation is completed in the self-checking mechanism for the collapsibility degree of loess, avoiding the problem that the dirt attached to the self-checking rod affects the subsequent detection of the collapsibility degree of loess, ensuring the stability of the detection of the collapsibility degree of loess each time, and thus ensuring the precise control of the accuracy of the chemical solution injection.

[0018] 3. By setting up a chemical reinforcement mechanism and a moving distance detection feedback trigger mechanism, the chemical reinforcement operation of the current position of the loess subgrade can be automatically carried out according to the moving distance, with a high degree of automation, more convenient operation, better applicability, ensuring the comprehensiveness of chemical reinforcement, avoiding the problem of easy incomplete reinforcement, and having a higher reinforcement quality.

[0019] In summary: The present invention ensures that the addition of the sodium silicate solution is within a suitable range, reduces the waste of chemical solutions, and can ensure the improvement quality of the collapsible loess subgrade, ensures the stability of the detection of the collapsibility degree of loess each time, and thus ensures the precise control of the accuracy of the chemical solution injection. It can automatically carry out the chemical reinforcement operation of the current position of the loess subgrade according to the moving distance, with a high degree of automation, ensures the comprehensiveness of chemical reinforcement, avoids the problem of easy incomplete reinforcement, and has a higher reinforcement quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a collapsible loess subgrade improvement device provided by the present invention;

[0021] Figure 2 is a schematic structural diagram of the lifting drive mechanism of a collapsible loess subgrade improvement device provided by the present invention;

[0022] Figure 3 is a schematic side view structural diagram of the self-checking mechanism for the collapsibility degree of loess of a collapsible loess subgrade improvement device provided by the present invention;

[0023] Figure 4 is a schematic structural diagram of the anti-error cleaning mechanism of a collapsible loess subgrade improvement device provided by the present invention;

[0024] Figure 5 It is a schematic structural diagram of a moving distance detection feedback trigger mechanism of a collapsible loess subgrade improvement device provided by the present invention;

[0025] Figure 6 It is a schematic structural diagram of a bidirectional conversion drive mechanism of a collapsible loess subgrade improvement device provided by the present invention.

[0026] In the figure: 1 mobile transport vehicle, 2 lifting drive mechanism, 21 L-shaped vertical plate, 22 reciprocating screw rod, 23 lifting screw barrel, 24 PLC controller, 3 self-checking mechanism for collapsibility degree of loess, 31 fixed shell, 32 guiding slide bar, 33 stress block, 34 fixed cylinder, 35 self-checking rod, 36 strip-shaped through hole, 37 return spring, 38 trigger shell, 39 extrusion push rod, 310 extrusion push plate, 311 damping rubber sleeve, 312 adjusting block, 313 conductive connecting piece, 314 resistance rod, 315 return permanent magnet block, 316 return electromagnetic block, 4 anti-error cleaning mechanism, 41 support plate, 42 pushing rod, 43 arc cleaning scraper, 44 wiping cleaning pad, 45 water supply pipe, 46 water supply pump, 47 anti-disconnection plate, 48 return spring, 49 thrust electromagnetic plate, 410 thrust permanent magnet plate, 5 chemical reinforcement mechanism, 51 static pressure component, 52 connecting block, 53 filling pipe, 54 medicine outlet hole, 55 through hole, 56 medicine storage cavity, 57 medicine adding pipe, 58 medicine adding pump, 59 guiding wheel, 6 moving distance detection feedback trigger mechanism, 61 reduction gearbox, 62 sprocket assembly, 63 insulating circular shell, 64 extension rod, 65 arc pressing block, 66 normally open pressing switch, 67 sound and light alarm, 7 bidirectional conversion drive mechanism, 71 double-shaft motor, 72 bearing seat, 73 transmission shaft, 74 connecting electromagnetic plate, 75 connecting permanent magnet plate, 76 first bevel gear assembly, 77 rotating shaft, 78 second bevel gear assembly, 79 inserting block, 710 inserting seat, 8 moving seat, 9 wheel axle, 10 supporting roller, 11 supporting plate. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0028] Such as Figures 1 - 6As shown, a device for improving collapsible loess roadbed comprises a mobile transport vehicle 1, the front end of the mobile transport vehicle 1 is fixedly connected to a mobile seat 8, the lower end of the mobile seat 8 is connected to supporting rollers 10 on both sides through wheel axles 9, the front end of the mobile seat 8 is fixedly connected to a supporting plate 11, and a lifting drive mechanism 2 is fixedly installed on the front side of the upper end of the supporting plate 11, and the lifting drive mechanism 2 comprises an L-shaped vertical plate 21 fixedly connected to the upper end of the supporting plate 11, and a reciprocating screw rod 22 is rotatably connected to the upper end of the supporting plate 11 on one side of the horizontal part of the L-shaped vertical plate 21 through a bearing, and a lifting screw barrel 23 is threadedly sleeved on the rod wall of the reciprocating screw rod 22, and a plurality of limit sliders are fixedly connected to the outer wall of the lifting screw barrel 23 close to the L-shaped vertical plate 21, and a limit slide groove is provided on the side wall of the vertical part of the L-shaped vertical plate 21 for matching and sliding with the limit slider.

[0029] The upper end of the horizontal portion of the L-shaped vertical plate 21 is fixedly provided with a bidirectional conversion drive mechanism 7 connected to the upper end of the reciprocating screw 22. The outer wall of the vertical portion of the L-shaped vertical plate 21 is also fixedly provided with a PLC controller 24. The bidirectional conversion drive mechanism 7 includes a biaxial motor 71 fixedly connected to the upper end of the L-shaped vertical plate 21. The upper end of the L-shaped vertical plate 21 is also fixedly connected to two bearing seats 72 symmetrically arranged about the biaxial motor 71. The inner wall of the bearing seat 72 is rotatably sleeved with a transmission shaft 73 through a ball bearing. The output ends of both ends of the biaxial motor 71 are fixedly connected to a connecting electromagnetic plate 74. The transmission shaft 73 is fixedly provided with a ball bearing. One end of the L-shaped vertical plate 21 is fixedly connected to a connecting permanent magnet plate 75 that contacts the connecting electromagnetic plate 74. One end of one transmission shaft 73 is transmission-connected to the upper end of the reciprocating screw 22 through a first bevel gear assembly 76. A through hole is also provided on one side surface of the upper end of the L-shaped vertical plate 21, and a rotating shaft 77 is rotatably sleeved in the corresponding through hole through a bearing. One end of the other transmission shaft 73 is transmission-connected to the upper end of the rotating shaft 77 through a second bevel gear assembly 78. The lower end of the rotating shaft 77 is fixedly connected to a plug-in block 79. The upper end of the self-test rod 35 is fixedly connected to a plug-in socket 710 that matches the plug-in block 79.

[0030] The output end of the lifting drive mechanism 2 is fixedly connected with a self-checking mechanism 3 for the collapsibility degree of loess. The self-checking mechanism 3 for the collapsibility degree of loess includes a fixed shell 31 fixedly connected to one side of the lifting screw barrel 23. The side of the fixed shell 31 away from the lifting screw barrel 23 is an opening. On the inner walls of the front and rear opposite sides at the lower end of the fixed shell 31, a plurality of guiding slide rods 32 are fixedly connected. A same stress block 33 is slidably sleeved outside the plurality of guiding slide rods 32. One end of the stress block 33 extends outside the fixed shell 31 and is fixedly connected with a fixed cylinder 34. Inside the fixed cylinder 34, a self-checking rod 35 is rotatably sleeved through a bearing. A strip-shaped through hole 36 for the lower end of the self-checking rod 35 to extend out is formed on the surface of the supporting plate 11. Between the rear inner wall of the fixed shell 31 and the stress block 33, a plurality of return springs 37 respectively sleeved outside the plurality of guiding slide rods 32 are fixedly connected. At the top of the front inner wall of the fixed shell 31, a trigger shell 38 is fixedly connected. Two through holes are formed on the side wall of the trigger shell 38 close to the stress block 33, and corresponding push rods 39 are movably inserted into the through holes. One ends of the two push rods 39 located outside the trigger shell 38 are fixedly connected with a same push plate 310. The inner walls of the trigger shell 38 corresponding to the through holes are fixedly connected with damping rubber sleeves 311 abutting against the outside of the push rods 39. One ends of the two push rods 39 located inside the trigger shell 38 are fixedly connected with a same adjusting block 312. An electrically conductive contact piece 313 is fixedly connected to the upper end of the adjusting block 312. A resistance rod 314 in electrical contact with the electrically conductive contact piece 313 is fixedly installed on the top inner wall of the trigger shell 38. A reset permanent magnet 315 is fixedly connected to the side wall of the adjusting block 312. A reset electromagnet 316 opposite to the position of the reset permanent magnet 315 is fixedly connected to one side of the inner wall of the trigger shell 38.

[0031] On the front side of the upper end of the supporting plate 11, an error-preventing cleaning mechanism 4 is also fixedly installed on one side of the self-checking mechanism 3 for the collapsibility degree of loess. The error-preventing cleaning mechanism 4 includes a supporting plate 41 fixedly connected to the upper end of the supporting plate 11. A plurality of through holes are formed on the side wall of the supporting plate 41, and corresponding push rods 42 are movably inserted into the through holes. One ends of the plurality of push rods 42 close to the self-checking rod 35 are fixedly connected with a same arc-shaped cleaning scraper 43 with a hollow structure. A wiping cleaning pad 44 is fixedly connected to the inner wall of the arc-shaped cleaning scraper 43. A plurality of water permeable holes communicating with the wiping cleaning pad 44 are formed inside the arc-shaped cleaning scraper 43. A water supply pipe 45 is fixedly connected to the upper end of the arc-shaped cleaning scraper 43. A water supply pump 46 is arranged on the water supply pipe 45. The water supply pump 46 is fixed to the lower end of the horizontal part of the L-shaped vertical plate 21. A retaining plate 47 is fixedly connected to the rear end of the push rod 42. A return spring 48 sleeved outside the push rod 42 is fixedly connected between the retaining plate 47 and the supporting plate 41. A plurality of thrust electromagnetic plates 49 are fixedly connected to the side wall of the supporting plate 41. A thrust permanent magnet 410 corresponding to the position of the thrust electromagnetic plate 49 is fixedly connected to the rear side of the arc-shaped cleaning scraper 43.

[0032] A chemical reinforcement mechanism 5 is fixedly installed on the upper end of the movable seat 8, and the chemical reinforcement mechanism 5 includes a static pressure component 51 fixedly connected to the upper end of the movable seat 8, and the output end of the static pressure component 51 is fixedly connected to a connecting block 52, and a filling pipe 53 is fixedly sleeved on the surface of one end of the connecting block 52. A plurality of drug outlet holes 54 are evenly opened on the wall of the filling pipe 53, and a one-way valve is provided in the corresponding drug outlet hole 54. A through hole 55 for the lower end of the filling pipe 53 to extend out is opened on the surface of the supporting plate 11, and a drug storage chamber 56 is provided in the mobile transport vehicle 1. The upper end of the filling pipe 53 is fixedly connected to a dosing pipe 57, and one end of the dosing pipe 57 extends into the drug storage chamber 56. A dosing pump 58 is provided on the dosing pipe 57, and the dosing pump 58 is fixedly connected to the upper end of the mobile transport vehicle 1. The upper end of the static pressure component 51 is fixedly connected to a guide wheel 59 for moving the dosing pipe 57.

[0033] The outer wall of the moving seat 8 is also fixedly provided with a moving distance detection feedback trigger mechanism 6 connected to the wheel axle 9. The moving distance detection feedback trigger mechanism 6 includes a reduction gear box 61 fixedly connected to the outer wall of the moving seat 8. The input end of the reduction gear box 61 is connected to the shaft wall of the wheel axle 9 through a sprocket assembly 62. One side of the reduction gear box 61 is also fixedly connected to an insulating circular shell 63. The output end of the reduction gear box 61 extends into the insulating circular shell 63 and is fixedly connected to an extension rod 64. One end of the extension rod 64 is fixedly connected to an arc-shaped pressing block 65. One side of the inner wall of the insulating circular shell 63 is also fixedly connected to a normally open press switch 66. The outer wall of the reduction gear box 61 is also fixedly provided with an audible and visual alarm 67.

[0034] The operating principle of the present invention is described as follows: the mobile transport vehicle 1 is used for the movement and propulsion of the entire device. The mobile transport vehicle 1 pushes the mobile seat 8 and the supporting roller 10 at the bottom of the mobile seat 8 to move synchronously on the loess roadbed. The wheel shaft 9 on the supporting roller 10 cooperates with the sprocket assembly 62 to drive the input end of the reduction gear box 61 to move synchronously, and then perform reduction transmission. The output end of the reduction gear box 61 drives the extension rod 64 to drive the arc-shaped pressing block 65 to rotate slowly. When the entire device moves 20m, the arc-shaped pressing block 65 acts on the normally open press switch 66, first connecting the power supply circuit of the sound and light alarm 67, and cooperating with the time relay to make the sound and light alarm 67 work for 5s, promptly reminding the driver of the mobile transport vehicle 1 to stop the movement of the entire device, and The feedback signal is given to the PLC controller 24, so that the dual-axis motor 71 works first, and the power supply circuit of the electromagnetic plate 74 corresponding to the first bevel gear assembly 76 of the dual-axis motor 71 is connected synchronously. The electromagnetic plate 74 and the permanent magnet plate 75 cooperate to make the dual-axis motor 71 drive the reciprocating screw 22 to rotate. The threaded connection between the reciprocating screw 22 and the lifting screw 23 makes the lifting screw 23 drive the self-checking rod 35 to move downward, so that the lower end of the self-checking rod 35 passes through the strip opening 36 on the surface of the supporting plate 11, penetrates the lower end of the supporting plate 11, and extends into the loess roadbed 50 cm. The driver then drives the mobile transport vehicle 1 to drive the detection device to rotate in place, thereby making the self-checking rod 35 move relatively in the loess roadbed. When the loess roadbed is more collapsible, the self-checking rod 35 moves relatively in the loess roadbed. The resistance of the feedback received by the inspection rod 35 is small, and the self-inspection rod 35 cooperates with the fixed cylinder 34 to drive the force block 33 to overcome the short distance of the return spring 37. One side of the force block 33 acts on the pushing plate 310, and the pushing plate 310 cooperates with the pushing rod 39 to push the adjustment block 312 to move a small distance, thereby making the conductive contact 313 move a small distance on the resistance rod 314. The resistance rod 314 is connected in series to the power supply circuit of the dosing pump 58. The distance the conductive contact 313 moves is small, and the resistance of the resistance rod 314 relative to the power supply circuit of the dosing pump 58 is small. The power supply current of the entire power supply circuit is large. The dosing pump 58 is a DC pump. Since the resistance of the dosing pump 58 itself is unchanged, the power supply voltage generated to the dosing pump 58 is larger, and its own working power is larger. In this subsequent chemical reinforcement operation, the dosing pump 58 has a relatively large amount of dosing in the timed filling work controlled by the PLC controller 24. On the contrary, when the loess roadbed is highly collapsible, the loess roadbed has a large relative resistance to the self-test rod 35, the relative movement distance of the force block 33 is large, and the movement distance of the conductive contact 313 is synchronously increased, thereby making the access resistance value of the resistor rod 314 larger, thereby making the power of the dosing pump 58 small, and making the dosing amount small. After 6 seconds of self-test work, the dual-axis motor 71 is driven again to drive the reciprocating screw rod 22 to rotate, so that the self-test rod 35 moves up and resets. At this time, the static pressure component 51 is automatically started by the PLC controller 24. The static pressure component 51 can be an anchor static pressure pile driver, so that the filling pipe 53 can be stably pressed into the loess roadbed.Start the chemical dosing pump 58 in combination with the connection relationship between the conductive tab 313 and the resistance rod 314, and cooperate with the chemical solution outlet hole 54 on the pipe wall of the dosing pipe 53 to achieve the injection of sodium silicate chemical solution into the loess subgrade. The action range of the sodium silicate chemical solution is 10 m. Therefore, during continuous operation, it can cover the entire loess subgrade, automatically perform chemical reinforcement operations on the loess subgrade at the current position according to the moving distance, with high automation, simpler operation, better applicability, and ensure the comprehensiveness of chemical reinforcement, avoiding the problem of easy incomplete reinforcement, with higher reinforcement quality. The sodium silicate solution is pressed into the soil and interacts with the water-soluble salts in the soil to form silica gel, which cements the soil and improves the mechanical strength of the loess subgrade. After the injection is completed, the dosing pipe 53 moves up and resets, and can self-detect the specific collapsibility degree of the collapsible loess subgrade, and feedback the detected data information to the subsequent actual chemical reinforcement operation of the sodium silicate solution, and self-adjust the dosage of the sodium silicate solution relative to the collapsibility degree of the loess at the current position, ensuring that the addition of the sodium silicate solution is within a suitable range, reducing the waste of chemical solution, and ensuring the improvement quality of the collapsible loess subgrade;

[0035] After the chemical reinforcement is completed and the reset is achieved, power is supplied to the reset electromagnet block 316 through the PLC controller 24. Through the cooperation of the reset electromagnet block 316 and the reset permanent magnet block 315, the adjustment block 312 drives the conductive contact piece 313 to reset to the original position. Also, due to the action of the reset spring 37, the force receiving block 33 drives the self-checking rod 35 to reset to the initial position. At this time, power is automatically supplied to the thrust electromagnetic plate 49 through the PLC controller 24 again. The thrust electromagnetic plate 49 generates magnetism when powered on and cooperates with the thrust permanent magnet plate 410 to make the arc-shaped cleaning scraper 43 and the wiping cleaning pad 44 contact the outside of the self-checking rod 35. When the self-checking rod 35 resets and moves upward, the socket 710 connected to the top end of the self-checking rod 35 is inserted and matched with the insertion block 79 connected to the lower end of the rotating shaft 77, realizing the relative connection between the rotating shaft 77 and the self-checking rod 35. At this time, power supply to the electromagnetic plate 74 connected near the first bevel gear assembly 76 is cut off through the PLC controller 24, and power supply to the electromagnetic plate 74 connected near the second bevel gear assembly 78 is synchronously connected. The dual-axis motor 71 drives the rotating shaft 77 to rotate the self-checking rod 35 synchronously through the second bevel gear assembly 78. The self-checking rod 35 rotates within the arc-shaped cleaning scraper 43 and the wiping cleaning pad 44. First, the arc-shaped cleaning scraper 43 scrapes off the soil adhering to the surface of the self-checking rod 35. The water supply pump 46 cooperates with the water supply pipe 45 to supply water into the arc-shaped cleaning scraper 43, and then the cleaning water is transported to the wiping cleaning pad 44 to wet the wiping cleaning pad 44, further cleaning the surface of the self-checking rod 35. It can automatically clean the dirt on the surface of the self-checking rod 35 each time the self-checking rod 35 completes the detection operation in the loess collapsibility degree self-checking mechanism 3, avoiding the problem that the dirt attached to the self-checking rod 35 affects the subsequent detection of the loess, thus ensuring the stability of the detection of the collapsibility degree of the loess each time, and further ensuring the precise control of the accuracy of the chemical solution injection.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for improving collapsible loess roadbed, comprising a mobile transport vehicle (1), characterized in that: The front end of the mobile transport vehicle (1) is fixedly connected to a mobile seat (8), and the lower end of the mobile seat (8) is connected to supporting rollers (10) on both opposite sides through axles (9). The front end of the mobile seat (8) is fixedly connected to a supporting plate (11), and a lifting drive mechanism (2) is fixedly installed on the front side of the upper end of the supporting plate (11). The output end of the lifting drive mechanism (2) is fixedly connected to a loess wetting degree self-checking mechanism (3), and the upper end front side of the supporting plate (11) is also fixedly installed with an anti-error cleaning mechanism (4) located on one side of the loess wetting degree self-checking mechanism (3). The upper end of the mobile seat (8) is fixedly installed with a chemical reinforcement mechanism (5), and the outer wall of the mobile seat (8) is also fixedly installed with a moving distance detection feedback trigger mechanism (6) connected to the axle (9); The loess collapsibility self-checking mechanism (3) comprises a fixed shell (31), a plurality of guide slide bars (32) are fixedly connected to the inner wall of the front and rear opposite sides of the lower end of the fixed shell (31), and the plurality of guide slide bars (32) are slidably sleeved with the same force block (33) on the outside, one end of the force block (33) extends out of the fixed shell (31) and is fixedly connected to a fixed cylinder (34), a self-checking rod (35) is rotatably sleeved in the fixed cylinder (34) via a bearing, a strip-shaped opening (36) for the lower end of the self-checking rod (35) to extend is provided on the surface of the supporting plate (11), a plurality of return springs (37) respectively sleeved on the outside of the plurality of guide slide bars (32) are fixedly connected between the rear inner wall of the fixed shell (31) and the force block (33), a trigger shell (38) is fixedly connected to the top of the front inner wall of the fixed shell (31), and the trigger shell (38) is close to the side of the force block (33). Two through holes are provided on the side wall, and a push rod (39) is provided in the movable sleeve corresponding to the through hole. One end of the two push rods (39) located outside the trigger shell (38) is fixedly connected to the same push plate (310). The inner wall of the trigger shell (38) corresponding to the through hole is fixedly connected to a damping rubber sleeve (311) that contacts the outside of the push rod (39). One end of the two push rods (39) located inside the trigger shell (38) is fixedly connected to the same adjustment block (312). The upper end of the adjustment block (312) is fixedly connected to a conductive contact (313). A resistor rod (314) electrically contacting the conductive contact (313) is fixedly installed on the top of the inner wall of the trigger shell (38). A reset permanent magnet block (315) is fixedly connected to the side wall of the adjustment block (312). A reset electromagnetic block (316) opposite to the reset permanent magnet block (315) is fixedly connected to one side of the inner wall of the trigger shell (38).

2. The collapsible loess roadbed improvement device according to claim 1, characterized in that: The lifting drive mechanism (2) includes an L-shaped vertical plate (21) fixedly connected to the upper end of the supporting plate (11), a reciprocating screw (22) is rotatably connected to the upper end of the supporting plate (11) on one side of the lower end of the horizontal portion of the L-shaped vertical plate (21) through a bearing, and a lifting screw barrel (23) is threadedly sleeved on the rod wall of the reciprocating screw rod (22), a two-way conversion drive mechanism (7) connected to the upper end of the reciprocating screw rod (22) is fixedly installed on the upper end of the horizontal portion of the L-shaped vertical plate (21), and a PLC controller (24) is also fixedly installed on the outer wall of the vertical portion of the L-shaped vertical plate (21), and the fixed shell (31) is fixedly connected to one side of the lifting screw barrel (23), and the fixed shell (31) is opened on the side away from the lifting screw barrel (23).

3. The collapsible loess roadbed improvement device according to claim 1, characterized in that: The error-proof cleaning mechanism (4) includes a support plate (41) fixedly connected to the upper end of the supporting plate (11), a plurality of through holes are opened on the side wall of the support plate (41), and a push rod (42) is movably inserted into the corresponding through holes, and a plurality of the push rods (42) are fixedly connected to an arc-shaped cleaning scraper (43) with the same hollow structure at one end close to the self-test rod (35), and a wiping cleaning pad (44) is fixedly connected to the inner wall of the arc-shaped cleaning scraper (43), and a plurality of water seepage holes connected to the wiping cleaning pad (44) are opened on the inner side of the arc-shaped cleaning scraper (43), and the upper end of the arc-shaped cleaning scraper (43) is fixedly connected to the inner wall of the arc-shaped cleaning scraper (43). A water supply pipe (45) is fixedly connected to the water supply pipe (45), and a water supply pump (46) is provided on the water supply pipe (45). The water supply pump (46) is fixed to the lower end of the horizontal portion of the L-shaped vertical plate (21). The rear end of the propulsion rod (42) is fixedly connected to an anti-slip plate (47). A return spring (48) sleeved on the outside of the propulsion rod (42) is fixedly connected between the anti-slip plate (47) and the support plate (41). A plurality of thrust electromagnetic plates (49) are fixedly connected to the side wall of the support plate (41). The rear side of the arc-shaped cleaning scraper (43) is fixedly connected to a thrust permanent magnet plate (410) corresponding to the position of the thrust electromagnetic plate (49).

4. The collapsible loess roadbed improving device according to claim 1, characterized in that: The chemical reinforcement mechanism (5) comprises a static pressure component (51) fixedly connected to the upper end of the movable seat (8), the output end of the static pressure component (51) is fixedly connected to a connecting block (52), one end surface of the connecting block (52) is fixedly sleeved with a filling pipe (53), a pipe wall of the filling pipe (53) is evenly provided with a plurality of drug outlet holes (54), and a one-way valve is provided in each of the drug outlet holes (54), and a surface of the supporting plate (11) is provided with a valve for the lower end of the filling pipe (53) to extend. A through hole (55) is formed in the mobile transport vehicle (1), a medicine storage chamber (56) is provided in the mobile transport vehicle (1), the upper end of the filling pipe (53) is fixedly connected to a medicine dosing pipe (57), one end of the medicine dosing pipe (57) extends into the medicine storage chamber (56), a medicine dosing pump (58) is provided on the medicine dosing pipe (57), and the medicine dosing pump (58) is fixedly connected to the upper end of the mobile transport vehicle (1), and the upper end of the static pressure component (51) is fixedly connected to a guide wheel (59) for transferring the medicine dosing pipe (57).

5. The collapsible loess roadbed improving device according to claim 1, characterized in that: The moving distance detection feedback trigger mechanism (6) comprises a reduction gear box (61) fixedly connected to the outer wall of the moving seat (8), an input end of the reduction gear box (61) and the shaft wall of the wheel shaft (9) are connected in transmission via a sprocket assembly (62), one side of the reduction gear box (61) is also fixedly connected to an insulating round shell (63), the output end of the reduction gear box (61) extends into the insulating round shell (63) and is fixedly connected to an extension rod (64), one end of the extension rod (64) is fixedly connected to an arc-shaped pressing block (65), one side of the inner wall of the insulating round shell (63) is also fixedly connected to a normally open press switch (66), and an outer wall of the reduction gear box (61) is also fixedly provided with an audible and visual alarm (67).

6. The collapsible loess roadbed improving device according to claim 2, characterized in that: The bidirectional conversion drive mechanism (7) includes a dual-axis motor (71) fixedly connected to the upper end of the L-shaped vertical plate (21), and the upper end of the L-shaped vertical plate (21) is also fixedly connected to two bearing seats (72) symmetrically arranged about the dual-axis motor (71), and the inner wall of the bearing seat (72) is rotatably sleeved with a transmission shaft (73) through a ball bearing, and both output ends of the dual-axis motor (71) are fixedly connected to a connecting electromagnetic plate (74), and one end of the transmission shaft (73) is fixedly connected to a connecting permanent magnet plate (75) that contacts the connecting electromagnetic plate (74), and one of the two ends of the transmission shaft (73) is fixedly connected to the connecting permanent magnet plate (75) that contacts the connecting electromagnetic plate (74). One end of the transmission shaft (73) is connected to the upper end of the reciprocating screw (22) through a first bevel gear assembly (76); a through hole is provided on one side surface of the upper end of the L-shaped vertical plate (21); and a rotating shaft (77) is rotatably sleeved in the corresponding through hole through a bearing; one end of the other transmission shaft (73) is connected to the upper end of the rotating shaft (77) through a second bevel gear assembly (78); a plug-in block (79) is fixedly connected to the lower end of the rotating shaft (77); and a plug-in socket (710) that matches and plugs into the plug-in block (79) is fixedly connected to the upper end of the self-test rod (35).

7. The collapsible loess roadbed improving device according to claim 2, characterized in that: A plurality of limiting sliding blocks are fixedly connected to the outer wall of one side of the lifting screw barrel (23) close to the L-shaped vertical plate (21), and a limiting sliding groove that matches and slides with the limiting sliding blocks is opened on the vertical side wall of the L-shaped vertical plate (21).

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