Soft soil foundation reinforcement equipment and reinforcement method for highway construction

Abstract

The present invention relates to the technical field of highway construction, specifically to a soft soil foundation reinforcement device for highway construction and a reinforcement method thereof, comprising a machine body, a bearing plate rotatably mounted on the front end of the machine body, a load-bearing plate fixedly mounted at the four corners of the lower end face of the machine body, and a transfer mechanism for uniformly mixing soft soil and curing agent provided at the front end of the bearing plate. By first breaking up the blocky soft soil and then mixing it, the mixed soft soil and curing agent are made more uniform, so that the formed soft soil foundation can achieve a sufficient reinforcement effect, thereby improving the stability of the construction quality, and by vibrating the mixture of soft soil and curing agent after stirring, the bubbles formed in the mixture are discharged, thereby avoiding the presence of a large number of bubbles in the soft soil foundation after curing, thereby improving the construction quality of the highway, reducing the difficulty and complexity of construction, and reducing the requirements for the construction team.

Description

Technical Field

[0001] The present invention relates to the technical field of highway construction, in particular to soft soil foundation reinforcement equipment and a reinforcement method for highway construction. Background Art

[0002] Expressways are the main transportation infrastructure connecting provinces and cities. Soft soil foundations are often encountered during expressway construction. Soft soil roadbeds have the characteristics of excessively large porosity, poor permeability, and high rheological properties. Without effective management measures, these soft soil foundations will lead to poor shear strength and easy settlement of the expressway. Therefore, reinforcement work is usually required when expressways encounter soft soil foundations.

[0003] Common soft soil foundation reinforcement methods now include foundation replacement method, heavy hammer tamping foundation method, dynamic tamping foundation method, lime soil compaction column method, vibration method, deep mixing method and foundation grouting method. Among them, the deep mixing method is more widely used. The deep mixing method mainly uses existing machinery to drill a number of mixing holes on the soft soil foundation, and then uses cement, lime and other materials as curing agents. The deep mixing machine is used to forcibly mix the soft soil and curing agent in situ deep in the foundation. The series of physical and chemical reactions generated between the curing agent and the soft soil are used to harden the soft soil. Although the existing soft soil foundation reinforcement equipment and reinforcement methods for highway construction are more efficient, they still have the following disadvantages:

[0004] 1. When reinforcing a soft soil foundation, first add a curing agent and scrape out the soft soil in the mixing hole during the mixing process so that the curing agent can enter the scraped soft soil to achieve the purpose of mixing and solidification. However, the deep soft soil has strong adhesion. Therefore, the soft soil usually exists in lumps during the mixing process, resulting in uneven mixing of the soft soil and the curing agent after stirring. Therefore, the formed soft soil foundation cannot achieve sufficient reinforcement effect, which leads to unstable construction quality.

[0005] 2. During the above-mentioned mixing process, the soft soil and the curing agent are mixed by forced rotation. However, a large amount of air will be mixed into the mixture during the mixing and rotating process. Therefore, a large number of bubbles will exist in the solidified foundation, which will destroy the structural strength of the soft soil foundation and thus affect the construction quality of the highway.

[0006] Therefore, in order to ensure that the reinforced soft soil foundation can meet the construction requirements of the expressway, the present invention provides a soft soil foundation reinforcement device and reinforcement method for expressway construction. Summary of the Invention

[0007] In order to solve the above technical problems, the present invention provides a soft soil foundation reinforcement device and reinforcement method for highway construction, which are achieved by the following specific technical means:

[0008] A soft soil foundation reinforcement device for highway construction includes a body, a bearing plate fixedly mounted on the front end of the body, load-bearing plates fixedly mounted at the four corners of the lower end surface of the body, and a transfer filling mechanism for uniformly mixing soft soil and curing agent provided at the front end of the bearing plate.

[0009] The transfer filling mechanism includes a driving part slidably mounted on the front end surface of the carrying plate, a feeding part is fixedly mounted on the upper end surface of the body, and a structural part is provided on the driving part.

[0010] A slow-lifting mechanism for layered stirring and mixing of soft soil and curing agent is fixedly installed on the front end surface of the bearing plate.

[0011] The slow-lifting mechanism includes a main body fixedly mounted on the front end surface of the supporting plate, a self-stabilizing part fixedly mounted on the internal upper end of the main body, and a lifting part slidably mounted on the internal lower end of the main body.

[0012] The lower end surface of the slow-lifting mechanism is provided with a vibrating mechanism for vibrating the soft soil and the curing agent.

[0013] As a preferred technical solution of the present invention, the driving part includes a driving box, a stirring drill pipe and a first motor. The front end surface of the supporting plate is slidably installed with the driving box through a set slide. The stirring drill pipe is rotatably installed inside the driving box, and the stirring drill pipe passes through the driving box. The first motor is fixedly installed inside the driving box, and the output end fixed sleeve of the first motor is provided with a first gear, and the fixed sleeve on the stirring drill pipe is provided with a second gear, and the first gear is meshed with the second gear.

[0014] As a preferred technical solution of the present invention, the feeding part includes a storage box, an extraction pump and a feeding pipe. The storage box is fixedly installed on the rear side of the upper end surface of the fuselage. The output end of the extraction pump is fixedly connected to the feeding pipe through an inclined pipe, and the feeding pipe is L-shaped. The extraction end of the extraction pump is inserted into the storage box.

[0015] As an optimal technical solution of the present invention, the structural part includes stirring blades, stirring drill bits, pipe grooves, feed troughs, discharge holes and positioning clamps. The side wall of the lower end of the stirring drill pipe is fixedly installed with a plurality of stirring blades in a circular array. The lower end surface of the stirring drill pipe is fixedly installed with a plurality of stirring drill bits distributed up and down in a circular array. A pipe groove is provided at the inner center of the stirring drill pipe, and the feed pipe is inserted into the pipe groove. A feed trough is provided at the inner lower end of the stirring drill pipe, and the pipe groove is connected to the feed trough. The stirring drill bit and the stirring blade surface are both provided with evenly distributed discharge holes, and the discharge holes are all connected to the feed trough. A plurality of positioning clamps are fixedly installed on the upper part of the stirring drill pipe in a linear array.

[0016] As a preferred technical solution of the present invention, the main body includes a working chamber, a cylinder, a lifting box and a self-stabilizing box. The working chamber is fixedly installed on the front end surface of the bearing plate and below the slide. The cylinders are fixedly installed symmetrically on the left and right inner lower end surface of the working chamber. The output ends of the left and right cylinders are jointly fixedly installed with a lifting box, and the lifting box is slidably connected in the working chamber. The self-stabilizing box is fixedly installed on the inner upper end of the working chamber, and the stirring drill pipes pass through the lifting box and the self-stabilizing box.

[0017] As a preferred technical solution of the present invention, the self-stabilizing part includes a first pressure supply pump, a first annular hydraulic tube, a spring telescopic rod, a support block and a ball. The self-stabilizing box and the working chamber are jointly fixedly installed with the first pressure supply pump. The lower end surface of the interior of the self-stabilizing box is fixedly installed with the first annular hydraulic tube, and the output end of the first pressure supply pump is fixedly connected to the first annular hydraulic tube. A plurality of first output pipes are arranged in a circular array on a side wall of the first annular hydraulic tube close to the stirring drill pipe. A spring telescopic rod is slidably installed inside the first output pipe. A support block is fixedly installed on the side wall of the spring telescopic rod close to the stirring drill pipe, and a ball is rotatably installed on the upper end surface of the support block.

[0018] As a preferred technical solution of the present invention, the lifting part includes a second pressure supply pump, a second annular hydraulic pipe, a semi-arc clamp and a limit rod. The second pressure supply pump is fixedly installed inside the lifting box, and the second annular hydraulic pipe is fixedly installed on the lower end surface of the interior of the lifting box, and the output end of the second pressure supply pump is fixedly connected to the second annular hydraulic pipe. The second annular hydraulic pipe is symmetrically provided with second output pipes on the left and right sides of a side wall close to the stirring drill pipe. The interiors of the symmetrical second output pipes are slidably connected with semi-arc clamps through provided piston rods, and the height of the semi-arc clamps is less than the distance between adjacent positioning clamps. Limit rods are symmetrically fixed between the semi-arc clamps and the second annular hydraulic pipe and in front and behind the second output pipe.

[0019] As a preferred technical solution of the present invention, the vibration mechanism includes a second motor, a gear disc, a top block and a protrusion. The second motor is fixedly installed on the inner lower end surface of the working chamber, and the output end of the second motor passes through the lower end surface of the working chamber and is fixedly sleeved with a third gear. A gear disc is rotatably installed at the center of the lower end surface of the working chamber, and the third gear is meshed with the gear disc. A vibration groove is opened at the center of the gear disc, and a number of top blocks are fixedly installed on the side walls of the vibration groove in a circumferential array. A number of protrusions corresponding to the top blocks are fixedly installed in a circumferential array on the middle and lower part of the side wall of the stirring drill pipe.

[0020] As a preferred technical solution of the present invention, the present invention also provides a specific reinforcement method for using the above-mentioned soft soil foundation reinforcement equipment for highway construction to perform specific work, which includes the following steps:

[0021] S1: Drilling mixing holes: Use existing machinery to drill several mixing holes and test the properties of the soft soil in the mixing holes.

[0022] S2: Extend the transfer filling mechanism: Extend the transfer filling mechanism to the bottom of the stirring hole processed by S1 through the slow lifting mechanism.

[0023] S3: Dispersing the soft soil in the mixing hole: The soft soil in the mixing hole after S1 treatment is dispersed by the driving unit.

[0024] S4: Injecting curing agent: Through the cooperation between the feeding part and the structural part, the curing agent is injected during the stirring process, so that the soft soil treated in S3 is fully mixed with the curing agent.

[0025] S5: Perform vibration compaction: Pause the driving part and perform vibration compaction on the soft soil and curing agent after the S4 treatment through the vibration compaction mechanism, and after the vibration compaction, lift the transfer filling mechanism through the slow lifting mechanism, and similarly perform stirring according to the properties of the soft soil in the stirring hole.

[0026] S6: Reinforcement work is completed: lift the transfer filling mechanism away from the mixing hole and wait for the soft soil to react with the curing agent to harden.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The soft soil foundation reinforcement equipment and reinforcement method for highway construction are used through the provided transfer filling mechanism to first forcefully stir the soft soil in the stirring hole, and then directly introduce the curing agent into the stirring soft soil during the stirring process. Therefore, by first breaking up the blocky soft soil and then mixing them, the mixed soft soil and curing agent are made more uniform, so that the formed soft soil foundation can achieve sufficient reinforcement effect, thereby improving the stability of construction quality.

[0029] 2. The soft soil foundation reinforcement equipment and reinforcement method for highway construction, through the use of the provided vibration mechanism, vibrates the mixture of soft soil and curing agent after stirring, thereby expelling bubbles formed in the mixture, thereby avoiding the presence of a large number of bubbles in the soft soil foundation after solidification, further improving the structural strength of the soft soil foundation, and thus improving the construction quality of the highway.

[0030] 3. The soft soil foundation reinforcement equipment and reinforcement method for highway construction, through the coordinated use of the transfer and filling mechanism and the slow-lifting mechanism, can adjust the mixing efficiency of the soft soil and curing agent mixture and the amount of curing agent added according to the different properties of the soft soil at different heights in the stirring hole. Therefore, while saving some material costs, it avoids the risk of foundation instability caused by soft soil liquefaction.

[0031] 4. The soft soil foundation reinforcement equipment and reinforcement method for highway construction simplify the steps of soft soil foundation reinforcement through the coordinated use of the transfer and filling mechanism, the vibration mechanism and the slow lifting mechanism. While ensuring the construction effect, this reduces the construction difficulty and complexity, and also reduces the requirements for the construction team. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the fuselage of the present invention.

[0033] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the fuselage of the present invention.

[0034] Figure 3 It is a schematic diagram of the three-dimensional structure of the driving part of the present invention.

[0035] Figure 4 This is a three-dimensional schematic diagram of the structural stirring drill pipe of the present invention.

[0036] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0037] Figure 6 It is a schematic diagram of the three-dimensional structure of the self-stabilizing part of the present invention.

[0038] Figure 7 for Figure 6 Schematic diagram of the enlarged structure at point B in the middle.

[0039] Figure 8 It is a schematic diagram of the three-dimensional structure of the lifting part of the present invention.

[0040] Figure 9 It is a schematic diagram of the three-dimensional structure of the vibration compaction mechanism of the present invention.

[0041] Figure 10 for Figure 9 Schematic diagram of the enlarged structure at point C in the middle.

[0042] In the figure: 1. Body; 2. Loading plate; 3. Loading plate; 4. Transfer mechanism; 41. Drive unit; 411. Drive box; 412. Mixing drill pipe; 413. First motor; 42. Feed unit; 421. Storage box; 422. Extraction pump; 423. Feed pipe; 43. Structural unit; 431. Mixing blade; 432. Mixing drill bit; 433. Pipe trough; 434. Feed trough; 435. Discharge hole; 436. Positioning clamp; 5. Slow-lift mechanism; 51. Main body; 511 , working chamber; 512, cylinder; 513, lifting box; 514, self-stabilizing box; 52, self-stabilizing part; 521, first pressure supply pump; 522, first annular hydraulic pipe; 523, spring telescopic rod; 524, support block; 525, ball; 53, lifting part; 531, second pressure supply pump; 532, second annular hydraulic pipe; 533, semi-arc clamping block; 534, limiting rod; 6, vibrating mechanism; 601, second motor; 602, gear disc; 603, top block; 604, protrusion. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0044] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 A soft soil foundation reinforcement equipment for highway construction includes a fuselage 1, a bearing plate 2 is fixedly installed at the front end of the fuselage 1, a load-bearing plate 3 is fixedly installed at the four corners of the lower end surface of the fuselage 1, and a transfer filling mechanism 4 for uniformly mixing soft soil and curing agent is provided at the front end of the bearing plate 2.

[0045] The transfer mechanism 4 includes a driving portion 41 slidably mounted on the front end surface of the carrier plate 2 , a feeding portion 42 is fixedly mounted on the upper end surface of the body 1 , and a structural portion 43 is provided on the driving portion 41 .

[0046] See also Figure 6 、 Figure 7 、 Figure 8 and Figure 9 A slow-lifting mechanism 5 for layered stirring and mixing of soft soil and curing agent is fixedly installed on the front end surface of the bearing plate 2.

[0047] The slow-lift mechanism 5 includes a main body 51 fixedly mounted on the front end of the supporting plate 2 , a self-stabilizing portion 52 fixedly mounted on the upper end of the main body 51 , and a lifting portion 53 slidably mounted on the lower end of the main body 51 .

[0048] See also Figure 9 and Figure 10 The lower end surface of the slow-lifting mechanism 5 is provided with a vibrating mechanism 6 for vibrating the soft soil and the curing agent.

[0049] See also Figure 3 The driving part 41 includes a driving box 411, a stirring drill pipe 412 and a first motor 413. The driving box 411 is slidably installed on the front end surface of the supporting plate 2 through a set slide. The stirring drill pipe 412 is rotatably installed inside the driving box 411, and the stirring drill pipe 412 passes through the driving box 411. The first motor 413 is fixedly installed inside the driving box 411, and the output end of the first motor 413 is fixedly sleeved with a first gear, and the stirring drill pipe 412 is fixedly sleeved with a second gear, and the first gear is meshed with the second gear.

[0050] During the specific work, before reinforcing the soft soil foundation, several mixing holes are drilled on the corresponding soft soil using machinery according to the design requirements, and the properties of the soft soil at different depths in the mixing holes are tested after drilling. After the test, the fuselage 1 is moved to the corresponding mixing hole, and the mixing drill pipe 412 is placed directly above the mixing hole. At this time, the load-bearing plate 3 below will ensure the stability of the fuselage 1 during operation.

[0051] When the stirring drill pipe 412 descends in the stirring hole, the drive box 411 will follow the stirring drill pipe 412 to descend in the slide of the supporting plate 2. When it descends to the lowest point, the first motor 413 is started to rotate with the first gear, and the stirring drill pipe 412 starts to rotate by engaging the second gear. During the rotation, the stirring blades 431 at the lower end of the stirring drill pipe 412 disperse the soft soil on the side wall of the stirring hole, and the stirring drill bit 432 stirs the soft soil at the bottom.

[0052] See also Figure 6 The main body 51 includes a working chamber 511, a cylinder 512, a lifting box 513 and a self-stabilizing box 514. The working chamber 511 is fixedly installed on the front end surface of the supporting plate 2 and below the slide. The cylinder 512 is fixedly installed on the lower end surface of the working chamber 511 symmetrically on the left and right. The output ends of the left and right cylinders 512 are jointly fixedly installed with the lifting box 513, and the lifting box 513 is slidably connected in the working chamber 511. The self-stabilizing box 514 is fixedly installed on the upper end of the working chamber 511, and the stirring drill pipe 412 passes through the lifting box 513 and the self-stabilizing box 514.

[0053] See also Figure 6 and Figure 7The self-stabilizing part 52 includes a first pressure supply pump 521, a first annular hydraulic tube 522, a spring telescopic rod 523, a support block 524 and a ball 525. The self-stabilizing box 514 and the working chamber 511 are jointly fixedly installed with the first pressure supply pump 521. The lower end surface of the interior of the self-stabilizing box 514 is fixedly installed with the first annular hydraulic tube 522, and the output end of the first pressure supply pump 521 is fixedly connected to the first annular hydraulic tube 522. A side wall of the first annular hydraulic tube 522 close to the stirring drill pipe 412 is provided with a plurality of first output pipes in a circumferential array. The inside of the first output pipe is slidably installed with a spring telescopic rod 523. The spring telescopic rod 523 is fixedly installed with a support block 524 on the side wall close to the stirring drill pipe 412, and the upper end surface of the support block 524 is rotatably installed with a ball 525.

[0054] During the specific work, after the preliminary preparations are completed, the first pressure supply pump 521 is in a state of pressurizing the first annular hydraulic pipe 522. Therefore, under the action of the hydraulic pressure, the spring telescopic rods 523 are all pushed out from the first output pipe toward the stirring drill pipe 412 to the maximum distance, so that a circle of support blocks 524 are all extended and fit into the stirring drill pipe 412. At this time, several support blocks 524 jointly support the same positioning clamping ring 436, thereby supporting the stirring drill pipe 412, and thus fixing the stirring drill pipe 412 in the self-stabilizing box 514.

[0055] When the stirring drill pipe 412 rotates, the ball 525 can reduce the friction force on the stirring drill pipe 412, and the spring telescopic rod 523 with the support block 524 can limit the position of the stirring drill pipe 412, thereby stabilizing its rotation position.

[0056] See also Figure 8 and Figure 9 The lifting part 53 includes a second pressure supply pump 531, a second annular hydraulic pipe 532, a semi-arc clamping block 533 and a limit rod 534. The second pressure supply pump 531 is fixedly installed inside the lifting box 513, and the second annular hydraulic pipe 532 is fixedly installed on the lower end surface of the interior of the lifting box 513, and the output end of the second pressure supply pump 531 is fixedly connected to the second annular hydraulic pipe 532. The second annular hydraulic pipe 532 is symmetrically provided with a second output pipe on the left and right sides of the side wall near the stirring drill pipe 412. The interiors of the symmetrical second output pipes are slidably connected with a semi-arc clamping block 533 through a set piston rod, and the height of the semi-arc clamping block 533 is less than the distance between adjacent positioning clamping rings 436. Limiting rods 534 are symmetrically fixed between the semi-arc clamping block 533 and the second annular hydraulic pipe 532 and in front and behind the second output pipe.

[0057] During specific operation, when the mixing drill pipe 412 needs to be lowered to the bottom of the mixing hole, the cylinder 512 is first started to move it upward with the lifting box 513 to the maximum distance. At this time, the lifting box 513 is just located between adjacent positioning clamps 436.

[0058] At this time, the second pressure supply pump 531 is started to supply pressure to the second annular hydraulic pipe 532. Under the action of the hydraulic pressure, the piston rod in the second output pipe pushes the semi-arc clamp 533 in the direction of the stirring drill pipe 412 at the same time. During this process, the limit rod 534 limits the moving direction of the semi-arc clamp 533, and when the piston rod moves the maximum distance, the semi-arc clamps 533 on both sides will clamp the stirring drill pipe 412. At this time, the semi-arc clamps 533 on both sides are located between adjacent positioning clamps 436, so that the cylinder 512 will support the stirring drill pipe 412 with the lifting box 513.

[0059] Then start the first pressure supply pump 521 to reduce the pressure on the first annular hydraulic pipe 522. The hydraulic pressure at this time will pull the spring telescopic rod 523 inward in the first output pipe, thereby moving the support block 524 away from the stirring drill pipe 412 and no longer supporting the positioning clamping ring 436, so that the stirring drill pipe 412 can move up and down in the self-stabilizing box 514 with the positioning clamping ring 436.

[0060] At this time, the cylinder 512 can be started in reverse to move the stirring drill pipe 412 fixed with the lifting box 513 downward. After it descends a certain distance, the first pressure supply pump 521 is started again to pressurize the first annular hydraulic pipe 522, so that the self-stabilizing part 52 fixes the stirring drill pipe 412 again. Then the second pressure supply pump 531 is started to reduce the pressure in the second annular hydraulic pipe 532, so that the lifting box 513 is separated from the stirring drill pipe 412. Then the above operation can be repeated to lower the stirring drill pipe 412 to the lowest point of the stirring hole, and it should be lowered slowly to avoid the stirring drill pipe 412 hitting the bottom of the stirring hole and damaging the stirring drill bit 432 when it descends rapidly.

[0061] See also Figure 2 The feeding part 42 includes a storage box 421, an extraction pump 422 and a feeding pipe 423. The storage box 421 is fixedly installed on the rear side of the upper end surface of the fuselage 1, and the extraction pump 422 is fixedly installed on the front end surface of the storage box 421. The output end of the extraction pump 422 is fixedly connected to the feeding pipe 423 through an inclined pipe, and the feeding pipe 423 is L-shaped, and the extraction end of the extraction pump 422 is inserted into the storage box 421.

[0062] See also Figure 4 and Figure 5The structural part 43 includes a stirring blade 431, a stirring drill bit 432, a pipe groove 433, a feed groove 434, a discharge hole 435 and a positioning clamp 436. The side wall of the lower end of the stirring drill pipe 412 is fixedly installed with a plurality of stirring blades 431 distributed up and down in a circular array. The lower end surface of the stirring drill pipe 412 is fixedly installed with a plurality of stirring drill bits 432 in a circular array. A pipe groove 433 is provided at the inner center of the stirring drill pipe 412, and the feed pipe 423 is inserted into the pipe groove 433. A feed groove 434 is provided at the inner lower end of the stirring drill pipe 412, and the pipe groove 433 is connected to the feed groove 434. The stirring drill bit 432 and the stirring blade 431 are both provided with evenly distributed discharge holes 435, and the discharge holes 435 are all connected to the feed groove 434. A plurality of positioning clamps 436 are fixedly installed on the upper part of the stirring drill pipe 412 in a linear array.

[0063] During specific operation, during the stirring process, the extraction pump 422 is started to extract the curing agent in the storage box 421 from the extraction end and inject it into the feed pipe 423. The curing agent is finally injected into the feed trough 434 through the feed pipe 423. When the curing agent fills it up, the curing agent will be squeezed out from the discharge hole 435 of the stirring blade 431 and the stirring drill bit 432, so that the curing agent is fully mixed into the soft soil during the stirring process, so that the mixed soft soil and curing agent are more uniform, so that the formed soft soil foundation can achieve sufficient reinforcement effect, thereby improving the stability of construction quality.

[0064] See also Figure 9 and Figure 10 The vibration mechanism 6 includes a second motor 601, a gear disc 602, a top block 603 and a protrusion 604. The second motor 601 is fixedly installed on the inner lower end surface of the working chamber 511, and the output end of the second motor 601 passes through the lower end surface of the working chamber 511 and is fixedly sleeved with a third gear. A gear disc 602 is rotatably installed at the center of the lower end surface of the working chamber 511, and the third gear is engaged with the gear disc 602. A vibration groove is opened at the center of the gear disc 602, and a number of top blocks 603 are fixedly installed on the side wall of the vibration groove in a circumferential array. A number of protrusions 604 corresponding to the top blocks 603 are fixedly installed in a circumferential array on the middle and lower part of the side wall of the stirring drill pipe 412.

[0065] During specific operation, after stirring for a certain period of time, the operation of the first motor 413 is stopped, and then the second motor 601 is started to rotate the gear disc 602 through the third gear. During its rotation, the top block 603 of the gear disc 602 will continuously contact the protrusion 604 of the stirring drill pipe 412, causing the two to undergo elastic deformation, thereby vibrating the stirring drill pipe 412, so that the stirring drill pipe 412 can vibrate the mixture of soft soil and curing agent, thereby expelling the bubbles formed in the mixture, thereby avoiding the presence of a large number of bubbles in the soft soil foundation after solidification, further improving the structural strength of the soft soil foundation, and thus improving the construction quality of the highway.

[0066] After the compaction is completed, the cylinder 512 is started in reverse so that it moves the lifting box 513 downward to the minimum distance of the telescopic end of the cylinder 512, and the second pressure supply pump 531 is used to supply pressure to the second annular hydraulic pipe 532, so that the lifting part 53 fixes the stirring drill pipe 412, and then the first pressure supply pump 521 is started to reduce the pressure on the first annular hydraulic pipe 522, so that the self-stabilizing part 52 releases the stirring drill pipe 412. At this time, the cylinder 512 is started to move the lifting box 513 upward, and the stirring drill pipe 412 is fixed by the self-stabilizing part 52 at the maximum distance, and then the lifting part 53 releases the stirring drill pipe 412 again and returns to its original position, and the upper layer of soft soil in the stirring hole is reinforced through the transfer filling mechanism 4, and the above operation is repeated until the stirring drill pipe 412 is out of the stirring hole.

[0067] The mixing efficiency of the soft soil and curing agent mixture and the amount of curing agent added can be adjusted according to the different properties of the soft soil at different heights in the mixing hole, thereby saving some material costs while avoiding the risk of soft soil liquefaction leading to foundation instability.

[0068] The present invention also provides a specific reinforcement method for using the above-mentioned soft soil foundation reinforcement equipment for highway construction to perform specific work, which includes the following steps:

[0069] S1: Drilling mixing holes: Before reinforcing the soft soil foundation, several mixing holes are drilled in the corresponding soft soil using machinery according to the design requirements. After drilling, workers test the properties of the soft soil at different depths in the mixing holes. After the test, the fuselage 1 is moved to the corresponding mixing hole, and the mixing drill pipe 412 is placed directly above the mixing hole.

[0070] S2: Extend the transfer mechanism 4: After the preliminary preparations are completed, the stirring drill pipe 412 is fixed in the self-stabilizing box 514. When the stirring drill pipe 412 needs to be lowered to the bottom of the stirring hole, first start the cylinder 512 to move it with the lifting box 513 to the maximum distance, and then start the second pressure supply pump 531 to clamp the stirring drill pipe 412 through the lifting part 53.

[0071] Then, the first pressure supply pump 521 is started to reduce the pressure on the first annular hydraulic pipe 522, and the restriction of the self-stabilizing part 52 on the stirring drill pipe 412 is released. The cylinder 512 can then be started in reverse to move the stirring drill pipe 412 fixed with the lifting box 513 downward. After descending a certain distance, the stirring drill pipe 412 is fixed again by the self-stabilizing part 52, and the lifting box 513 is separated from the stirring drill pipe 412 by the lifting part 53. Then the above operation can be repeated to lower the stirring drill pipe 412 to the lowest point of the stirring hole.

[0072] S3: Disperse the soft soil in the stirring hole: Start the first motor 413 to make the driving part 41 start to rotate with the stirring drill pipe 412. During the rotation, the stirring blades 431 at the lower end of the stirring drill pipe 412 disperse the soft soil on the side wall of the stirring hole, and the stirring drill bit 432 stirs the soft soil at the bottom.

[0073] S4: Injecting curing agent: During the stirring process, the extraction pump 422 is started to transfer the curing agent in the storage box 421 through the feeding part 42 and the structural part 43, so that the curing agent is fully mixed into the soft soil during the stirring process.

[0074] S5: Vibration: After stirring for a certain period of time, the first motor 413 is stopped, and then the second motor 601 is started to vibrate the stirring drill pipe 412 through the vibration mechanism 6, so that the stirring drill pipe 412 can vibrate the mixture of soft soil and curing agent, thereby expelling bubbles formed in the mixture.

[0075] After the compaction is completed, the soft soil at different depths in the mixing hole is reinforced through the cooperation between the transfer filling mechanism 4 and the slow lifting mechanism 5, and the above operation is repeated until the mixing drill pipe 412 is separated from the mixing hole.

[0076] S6: Reinforcement work is completed: After the transfer filling mechanism 4 is lifted away from the mixing hole, the next mixing hole can be reinforced and the soft soil and the curing agent are allowed to react and harden.

[0077] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A soft soil foundation reinforcement device for highway construction, comprising a body, characterized in that: A bearing plate is fixedly installed at the front end of the fuselage, and a load-bearing plate is fixedly installed at the four corners of the lower end surface of the fuselage. A transfer filling mechanism for uniformly mixing soft soil and curing agent is provided at the front end of the bearing plate; The transfer mechanism includes a driving part slidably mounted on the front end surface of the carrier plate, a feeding part is fixedly mounted on the upper end surface of the body, and a structural part is provided on the driving part; A slow-lifting mechanism for layered mixing of soft soil and curing agent is fixedly installed on the front end of the bearing plate; The slow-lift mechanism includes a main body fixedly mounted on the front end surface of the carrier plate, a self-stabilizing portion fixedly mounted on the upper end of the main body, and a lifting portion slidably mounted on the lower end of the main body; The lower end surface of the slow-lifting mechanism is provided with a vibrating mechanism for vibrating the soft soil and the curing agent; The main body includes a working chamber, a cylinder, a lifting box and a self-stabilizing box. The working chamber is fixedly installed on the front end surface of the carrying plate and below the slide. The cylinders are fixedly installed on the lower end surface of the working chamber symmetrically. The output ends of the left and right cylinders are fixedly installed with the lifting box, and the lifting box is slidably connected in the working chamber. The self-stabilizing box is fixedly installed on the upper end of the working chamber, and the stirring drill pipe passes through the lifting box and the self-stabilizing box. The self-stabilizing part includes a first pressure supply pump, a first annular hydraulic pipe, a spring telescopic rod, a support block and a ball bearing. The self-stabilizing box and the working chamber are jointly fixedly installed with the first pressure supply pump. The first annular hydraulic pipe is fixedly installed on the lower end surface of the interior of the self-stabilizing box, and the output end of the first pressure supply pump is fixedly connected to the first annular hydraulic pipe. A side wall of the first annular hydraulic pipe close to the stirring drill pipe is provided with a plurality of first output pipes in a circumferential array. The interior of each of the first output pipes is slidably installed with a spring telescopic rod, and a side wall of the spring telescopic rod close to the stirring drill pipe is fixedly installed with a support block, and the upper end surface of each support block is rotatably installed with a ball bearing. The lifting part includes a second pressure supply pump, a second annular hydraulic pipe, a semi-arc clamp and a limit rod. The second pressure supply pump is fixedly installed inside the lifting box, and the second annular hydraulic pipe is fixedly installed on the lower end surface of the interior of the lifting box, and the output end of the second pressure supply pump is fixedly connected to the second annular hydraulic pipe. The second annular hydraulic pipe is symmetrically provided with second output pipes on the left and right sides of a side wall close to the stirring drill pipe. The interiors of the symmetrical second output pipes are slidably connected with semi-arc clamps through set piston rods, and the height of the semi-arc clamps is less than the distance between adjacent positioning clamps. Limit rods are symmetrically fixed between the semi-arc clamps and the second annular hydraulic pipe and in front and behind the second output pipe.

2. The soft soil foundation reinforcement equipment for highway construction according to claim 1, characterized in that: The driving part includes a driving box, a stirring drill pipe and a first motor. The front end surface of the supporting plate is slidably installed with the driving box through a set slide. The stirring drill pipe is rotatably installed inside the driving box, and the stirring drill pipe passes through the driving box. The first motor is fixedly installed inside the driving box, and the output end of the first motor is fixedly sleeved with a first gear, and the stirring drill pipe is fixedly sleeved with a second gear, and the first gear is meshed with the second gear.

3. The soft soil foundation reinforcement equipment for highway construction according to claim 1, characterized in that: The feeding part includes a storage box, an extraction pump and a feeding pipe. The storage box is fixedly installed on the rear side of the upper end surface of the fuselage, and the extraction pump is fixedly installed on the front end surface of the storage box. The output end of the extraction pump is fixedly connected to the feeding pipe through an inclined pipe, and the feeding pipe is L-shaped, and the extraction end of the extraction pump is inserted into the storage box.

4. The soft soil foundation reinforcement equipment for highway construction according to claim 2, characterized in that: The structural part includes stirring blades, stirring drill bits, pipe grooves, feed troughs, discharge holes and positioning clamps. The side wall of the lower end of the stirring drill pipe is fixedly installed with a number of stirring blades distributed up and down in a circular array. The lower end surface of the stirring drill pipe is fixedly installed with a number of stirring drill bits in a circular array. A pipe groove is provided at the inner center of the stirring drill pipe, and the feed pipe is inserted into the pipe groove. A feed trough is provided at the inner lower end of the stirring drill pipe, and the pipe groove is connected to the feed trough. The stirring drill bit and the stirring blade surface are both provided with evenly distributed discharge holes, and the discharge holes are all connected to the feed trough. A number of positioning clamps are fixedly installed on the upper part of the stirring drill pipe in a linear array.

5. The soft soil foundation reinforcement equipment for highway construction according to claim 1, characterized in that: The vibration mechanism includes a second motor, a gear disc, a top block and a protrusion. The second motor is fixedly installed on the inner lower end surface of the working chamber, and the output end of the second motor passes through the lower end surface of the working chamber and is fixedly sleeved with a third gear. A gear disc is rotatably installed at the center of the lower end surface of the working chamber, and the third gear is meshed with the gear disc. A vibration groove is opened at the center of the gear disc, and a number of top blocks are fixedly installed on the side walls of the vibration groove in a circumferential array. A number of protrusions corresponding to the top blocks are fixedly installed in a circumferential array on the middle and lower part of the side wall of the stirring drill pipe.

6. A method for reinforcing a soft soil foundation for highway construction, accomplished in conjunction with the soft soil foundation reinforcement equipment for highway construction according to claim 1, characterized in that: The specific reinforcement method includes the following steps: S1: Drilling mixing holes: Use existing machinery to drill several mixing holes and test the properties of the soft soil in the mixing holes; S2: Extend the transfer filling mechanism: Extend the transfer filling mechanism to the bottom of the stirring hole processed by S1 through the slow lifting mechanism; S3: Dispersing the soft soil in the mixing hole: The driving unit disperses the soft soil in the mixing hole after S1 treatment; S4: Injecting curing agent: Through the cooperation between the feeding part and the structural part, the curing agent is injected during the stirring process, so that the soft soil treated in S3 is fully mixed with the curing agent; S5: Perform vibration compaction: Pause the driving part and compact the soft soil and curing agent after S4 through the vibration compaction mechanism, and after compaction, lift the transfer filling mechanism through the slow lifting mechanism, and similarly, stir according to the properties of the soft soil in the mixing hole; S6: Reinforcement work is completed: lift the transfer filling mechanism away from the mixing hole and wait for the soft soil to react with the curing agent to harden.

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