Highway soft foundation treatment structure and construction method thereof

Abstract

The invention relates to a highway soft foundation treatment structure and a construction method thereof, and belongs to the technical field of highway soft foundation treatment.The highway soft foundation treatment structure comprises a rotating disc and a hollow pipe arranged on the rotating disc, and an opening and closing plate is hinged to a pipe opening, away from one end of the rotating disc, of the hollow pipe; the hollow pipe is provided with an adjusting piece used for adjusting the opening and closing plate to rotate in the direction close to the hollow pipe, an elastic piece is arranged at the end, away from the rotary disc, of the hollow pipe and located on the side, away from the hollow pipe, of the opening and closing plate, and an abutting strip is slidably arranged at the end, away from the rotary disc, of the hollow pipe. The abutting strip is located between the elastic piece and the opening and closing plate, the hollow pipe is provided with a first transmission part, and the first transmission part is used for pushing the abutting strip to move towards the elastic piece when the opening and closing plate rotates towards the direction away from the hollow pipe to open the hollow pipe. Under the condition that the cross sectional area of the hollow pipe is not changed, the effect of enlarging the contact area of gravel and the soft foundation to a certain extent is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of highway soft foundation treatment, and in particular to a highway soft foundation treatment structure and a construction method thereof. Background Art

[0002] In highway engineering, soft foundations such as clay, silt or other loose soils are usually treated in order to improve the bearing capacity and stability of the soft soil layer and ensure the long-term use of the road.

[0003] In the related art, a Chinese patent document with publication number CN112030642A discloses a highway soft foundation treatment structure and construction method, wherein the highway soft foundation treatment structure includes a U-shaped seat, a turntable and a hollow tube, wherein the hollow tube is spiral-shaped and arranged below the turntable, wherein the end of the hollow tube close to the turntable is connected to a through hole, and the end of the hollow tube away from the turntable is fixedly connected to a fin plate, and baffle plates are hinged on both sides of the fin plate. Meanwhile, a driving member for driving the turntable and the hollow tube to move is arranged on the U-shaped seat. When in use, sand and gravel are loaded into the hollow tube through the through hole, and the hollow tube is rotated into the soft foundation by driving the turntable and the hollow tube to rotate and move in coordination, and then the hollow tube is driven to rotate out of the soft foundation, and the sand and gravel in the hollow tube can abut against the baffle plate under the action of gravity to open the hollow tube, and then the sand and gravel are transported to the soft foundation through the hollow tube to form a spiral pile.

[0004] Regarding the above-mentioned related technologies, since the filling space of sand and gravel in the soft foundation is completely dependent on the cross-sectional size of the hollow tube, the contact area between the sand and gravel and the soft foundation is limited. Summary of the invention

[0005] In order to expand the contact area between sand and soft foundation to a certain extent without changing the cross-sectional area of ​​the hollow tube, the present application provides a highway soft foundation treatment structure and a construction method thereof.

[0006] In the first aspect, the present application provides a highway soft foundation treatment structure, which adopts the following technical solution: A highway soft foundation treatment structure comprises a turntable and a hollow tube arranged on the turntable, an opening and closing plate is hinged at the pipe mouth of the hollow tube away from the turntable, the hollow tube is provided with an adjusting member for adjusting the opening and closing plate to rotate in a direction close to the hollow tube, an elastic sheet is provided at the end of the hollow tube away from the turntable, the elastic sheet is located on the side of the opening and closing plate away from the hollow tube, an abutment bar is slidably provided at the end of the hollow tube away from the turntable, the abutment bar is located between the elastic sheet and the opening and closing plate, and the hollow tube is provided with a first transmission member, the first transmission member is used to make the opening and closing plate rotate in a direction away from the hollow tube, and push the abutment bar to move in a direction close to the elastic sheet when the hollow tube is opened.

[0007] Preferably, a rotating shaft is provided on the opening and closing plate, and the rotating shaft is rotatably arranged on the inner wall of the hollow tube. The adjusting member includes a torsion spring sleeved on the rotating shaft, one end of the torsion spring is arranged on the inner wall of the hollow tube, and the other end is arranged on the opening and closing plate. When the torsion spring is in a natural state, the opening and closing plate closes the corresponding end of the hollow tube.

[0008] Preferably, two elastic sheets are arranged opposite to each other, the opening and closing plate is located between the two elastic sheets, the abutment strips correspond to the elastic sheets one by one, and the abutment strips are located between the corresponding elastic sheets and the opening and closing plates.

[0009] Preferably, the first transmission member includes a connecting rod hinged on the abutment bar, the abutment bar is aligned with the side of the opening and closing plate close to the rotating shaft, the two connecting rods on the abutment bars are hinged to each other, the hinge axis of the connecting rod is perpendicular to the hinge axis of the opening and closing plate, the connecting rod extends toward the side of the abutment bar away from the rotating shaft, and the opening and closing plate is used to abut against one end of the two connecting rods that are hinged to each other.

[0010] Preferably, when the opening and closing plate abuts against the inner wall of the hollow tube to close the hollow tube, an end of the opening and closing plate away from the rotating shaft is inclined toward an end of the hollow tube away from the rotating disk.

[0011] Preferably, a connecting block is provided relatively to the end of the hollow tube away from the turntable, and the connecting block corresponds to the elastic sheet one by one. The elastic sheet is slidably provided on the corresponding connecting block, and the sliding direction of the elastic sheet is parallel to the axial direction of the end of the hollow tube away from the turntable. The abutment strip is slidably provided on the connecting block on the corresponding side, and a second transmission member is provided on the elastic sheet, and the second transmission member is used to drive the elastic sheet to move in the direction away from the hollow tube when the opening and closing plate rotates in the direction away from the hollow tube.

[0012] Preferably, the second transmission member includes a limit block arranged on the side of the elastic sheet away from the hollow tube, the limit block extends in a direction close to the opening and closing plate, and the limit block is located on the side of the opening and closing plate away from the hollow tube.

[0013] Preferably, a first magnet is provided on the abutment strip, and a second magnet is provided on the connection block. The first magnet is used to be adsorbed and fixed with the second magnet on the corresponding connection block. When the first magnet is adsorbed and fixed with the corresponding second magnet, the abutment strip and the elastic sheet are in a disengaged state.

[0014] Preferably, a fixing block is provided on the connecting block, and the fixing block is located on the side of the corresponding elastic sheet close to the hollow tube. The fixing block is provided with an adhesive for bonding and fixing the elastic sheet. When the adhesive is bonded and fixed to the elastic sheet, a side of the elastic sheet away from the fixing block is flush with a side of the abutment strip away from the connecting block.

[0015] In the second aspect, the present application provides a construction method for treating soft foundation of a highway, which adopts the following technical scheme: A construction method for treating soft foundation of a highway, using the above-mentioned soft foundation treatment structure of the highway, further comprising the following steps: Pre-treatment: Clean and survey the road surface to be treated, and crush the road surface rocks with a crusher; Screw pile forming: the equipment is placed on both sides of the pre-treated road surface, and the opening and closing plates are adjusted by the adjusting parts to close the end of the hollow tube away from the turntable, and the turntable and the hollow tube are driven to rotate and move, so that the hollow tube is rotated into the ground, and then sand and gravel are loaded into the hollow tube from the upper end of the hollow tube, so that the hollow tube is rotated into the required depth in the soft foundation, and the hollow tube forms a spiral channel in the soft foundation, and then the hollow tube is driven to gradually rotate out of the soft foundation. At the same time, the opening and closing plates rotate in the direction away from the hollow tube under the action of the gravity of the sand and gravel to open the hollow tube, and the abutment bar is pushed by the first transmission member to move in the direction close to the elastic sheet, and the abutment bar pushes the elastic sheet to deform and evert in the direction away from the hollow tube. In the process of the hollow tube being rotated out, the elastic sheet abuts against the inner wall of the spiral channel to expand the spiral channel, and the sand and gravel in the hollow tube are transported along the hollow tube to the soft foundation to form a screw pile; Paving and compaction: The road surface is flattened using a road compactor.

[0016] In summary, this application includes the following beneficial technical effects: When in use, the opening and closing plate is adjusted by the adjusting member to close the end of the hollow tube away from the turntable, the turntable and the hollow tube are driven to rotate toward the ground, and sand and gravel are loaded into the hollow tube from the upper end of the hollow tube, and then the hollow tube is continuously rotated into the soft foundation. After rotating to the required depth, the hollow tube forms a spiral channel in the soft foundation; then the hollow tube is driven to gradually rotate out of the soft foundation, and at the same time, the opening and closing plate is rotated in the direction away from the hollow tube under the action of the gravity of the sand and gravel to open the hollow tube. When the opening and closing plate rotates in the direction away from the hollow tube, the abutting bar is pushed by the first transmission member to move in the direction close to the elastic sheet, and the abutting bar pushes the elastic sheet to deform and evert in the direction away from the hollow tube, so that in the process of rotating the hollow tube out, the elastic sheet abuts against the inner wall of the spiral channel to expand the spiral channel, and the sand and gravel in the hollow tube are transported along the hollow tube to the soft foundation to form a spiral pile, thereby expanding the contact area between the sand and gravel and the soft foundation to a certain extent without changing the cross-sectional area of ​​the hollow tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0018] Figure 2 It is a partial structural exploded diagram of an embodiment of the present application.

[0019] Figure 3 yes Figure 2 Enlarged view of part A.

[0020] Figure 4 It is a partial structural exploded diagram from another perspective of an embodiment of the present application.

[0021] Explanation of the accompanying drawings: 1. turntable; 2. hollow tube; 3. opening and closing plate; 4. elastic sheet; 5. abutment strip; 6. rotating shaft; 7. torsion spring; 8. connecting rod; 9. connecting block; 10. limiting block; 11. first magnet; 12. second magnet; 13. fixing block; 14. guide rail; 15. sliding strip; 16. support. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-4 This application is described in further detail.

[0023] The present application embodiment discloses a highway soft foundation treatment structure. Figure 1 The highway soft foundation treatment structure includes a turntable 1 and a hollow tube 2. The hollow tube 2 is fixedly connected to the lower end of the turntable 1. The hollow tube 2 is spiral and extends toward the ground. The cross-sectional shape of the hollow tube 2 is a teardrop shape. A through hole is provided on the turntable 1 and communicated with the upper end of the hollow tube 2, so as to facilitate the loading of sand and gravel into the hollow tube 2. In the embodiment of the present application, the driving structure for driving the turntable 1 and the hollow tube 2 to move and rotate is the same as that in the related art, and will not be repeated here.

[0024] Reference Figure 1 , Figure 2 and Figure 3 A support 16 is fixed to the inner wall of the pipe opening of the end of the hollow tube 2 away from the turntable 1, and the support 16 is located at the end of the hollow tube 2 with a smaller cross section. An opening and closing plate 3 for opening and closing the pipe opening corresponding to the end of the hollow tube 2 is hinged on the support 16. A rotating shaft 6 is fixed on the opening and closing plate 3, and the rotating shaft 6 is rotatably penetrated on the support 16. The hinge axis of the hollow tube 2 is perpendicular to the axial direction of the end of the hollow tube 2 away from the turntable 1. An adjusting member is provided on the support 16 for adjusting the opening and closing plate 3 to rotate toward the direction close to the hollow tube 2.

[0025] Reference Figure 2 and Figure 3 , the hollow tube 2 is away from the turntable 1 (refer to Figure 1 ) A connecting block 9 is fixed on the outer wall of one end, and an elastic sheet 4 is arranged on the connecting block 9. The elastic sheet 4 is located on the side of the opening and closing plate 3 away from the hollow tube 2. The elastic sheet 4 extends along the axial direction of the corresponding end of the hollow tube 2. The elastic sheet 4 is made of elastic steel sheet.

[0026] Reference Figure 2 and Figure 4A contact bar 5 is slidably provided on the connecting block 9, and the sliding direction of the contact bar 5 is perpendicular to the axial direction of the end of the hollow tube 2 away from the turntable 1. Specifically, the sliding direction of the contact bar 5 is parallel to the plane where the pipe opening of the end of the hollow tube 2 away from the turntable 1 is located. A guide rail 14 is fixed on the connecting block 9, and the contact bar 5 slides with the guide rail 14. The guide rail 14 is set to guide the sliding direction of the contact bar 5 and prevent the contact bar 5 from detaching from the connecting block 9; the contact bar 5 is located between the elastic sheet 4 and the opening and closing plate 3, and the contact bar 5 is used to push the elastic sheet 4 to deform and turn outward in the direction away from the hollow tube 2. A first transmission member is provided on the connecting block 9, and the first transmission member is used to make the opening and closing plate 3 rotate in the direction away from the hollow tube 2 to open the hollow tube 2, and push the contact bar 5 to move in the direction close to the elastic sheet 4.

[0027] When in use, the opening and closing plate 3 is adjusted by the adjusting piece to rotate toward the direction close to the hollow tube 2 to close the end of the hollow tube 2 away from the turntable 1, and then the turntable 1 and the hollow tube 2 are driven to rotate toward the ground, and then sand and gravel are loaded into the hollow tube 2 from the upper end of the hollow tube 2, and then the hollow tube 2 is continued to be rotated into the soft foundation. After rotating to the required depth, the hollow tube 2 forms a spiral channel in the soft foundation; then the hollow tube 2 is driven to gradually rotate out of the soft foundation, and at the same time, the opening and closing plate 3 is rotated in the direction away from the hollow tube 2 under the action of the gravity of the sand and gravel to open the hollow tube 2, and the opening and closing plate When the hollow tube 2 rotates in a direction away from the hollow tube 2, the abutting bar 5 is pushed by the first transmission member to move in a direction close to the elastic sheet 4, and the abutting bar 5 pushes the elastic sheet 4 to deform and turn outward in a direction away from the hollow tube 2. Therefore, in the process of the hollow tube 2 being rotated out, the elastic sheet 4 abuts against the inner wall of the spiral channel to expand the spiral channel, and sand and gravel are transported along the hollow tube 2 to the soft foundation to form a spiral pile. In addition, without changing the cross-sectional area of ​​the hollow tube 2, the contact area between the sand and gravel and the soft foundation is expanded to a certain extent, thereby further ensuring the safety of vehicle operation on the road surface.

[0028] Reference Figure 2 and Figure 3 In order to facilitate the adjustment of the opening and closing plate 3 to open or close the hollow tube 2, the adjusting member includes a torsion spring 7, which is sleeved on the rotating shaft 6, one end of the torsion spring 7 is fixed on the support 16, and the other end is fixed on the opening and closing plate 3. When the torsion spring 7 is in a natural state, the opening and closing plate 3 closes the corresponding end of the hollow tube 2, and the gravity of the sand and gravel in the hollow tube 2 is greater than the torsion of the torsion spring 7. When the hollow tube 2 is rotated toward the ground, the opening and closing plate 3 is subjected to the abutment force of the soil, so that the sand and gravel in the hollow tube 2 will not push the opening and closing plate 3 to rotate in the direction away from the hollow tube 2; when the hollow tube 2 is rotated out in the direction away from the ground, the opening and closing plate 3 is no longer abutted by the soil, and the sand and gravel in the hollow tube 2 moves along the hollow tube 2 under the action of gravity, and then abuts the opening and closing plate 3 to rotate in the direction away from the hollow tube 2, so that the torsion spring 7 is deformed to open the hollow tube 2, so as to facilitate the sand and gravel to fill the spiral channel in the soft foundation.

[0029] Reference Figure 2 and Figure 3 When the opening and closing plate 3 abuts against the inner wall of the hollow tube 2 to close the hollow tube 2, the end of the opening and closing plate 3 away from the rotating shaft 6 tilts toward the end of the hollow tube 2 away from the turntable 1, so that the opening and closing plate 3 cannot rotate toward the direction close to the hollow tube 2 and open the hollow tube 2 in the opposite direction, and thus the opening and closing plate 3 will not be affected by the abutment force of the soil to open the hollow tube 2 in the opposite direction, which helps to ensure that the soil cannot enter the hollow tube 2.

[0030] Reference Figure 2 and Figure 4 There are two connecting blocks 9 symmetrically arranged along the axial direction of the hollow tube 2, the elastic sheet 4 corresponds to the connecting blocks 9 one by one, the opening and closing plate 3 is located between the two elastic sheets 4, the abutment strip 5 corresponds to the elastic sheet 4 one by one, the abutment strip 5 is located between the corresponding elastic sheet 4 and the opening and closing plate 3, the abutment strip 5 is aligned with the side of the opening and closing plate 3 close to the rotating shaft 6, and two opposite elastic sheets 4 are arranged, which helps to further ensure the expansion effect of the spiral channel in the soft foundation and further expand the contact area between the sand and the soft foundation.

[0031] Reference Figure 2 and Figure 4 Specifically, in order to facilitate the opening and closing plate 3 to rotate in the direction away from the hollow tube 2 and push the abutment bar 5 to move in the direction close to the elastic sheet 4, the first transmission member includes a connecting rod 8, the connecting rod 8 corresponds to the abutment bar 5 one by one, one end of the connecting rod 8 is hinged on the abutment bar 5, and the ends of the two connecting rods 8 away from the abutment bar 5 are hinged to each other, the hinge axis of the connecting rod 8 is perpendicular to the hinge axis of the opening and closing plate 3, and the connecting rod 8 moves toward the abutment bar 5 away from the rotating shaft 6 (refer to Figure 3 ), and the opening and closing plate 3 is used to abut against one end of the two connecting rods 8 that are hinged to each other.

[0032] When the opening and closing plate 3 rotates in the direction away from the hollow tube 2, the opening and closing plate 3 gradually approaches the two connecting rods 8, and then the side of the opening and closing plate 3 away from the hollow tube 2 abuts against one end of the two connecting rods 8 hinged to each other. As the opening and closing plate 3 continues to rotate, the opening and closing plate 3 abuts against the two connecting rods 8, so that the connecting rods 8 push the corresponding abutment strips 5 to move in the direction close to the elastic sheet 4, thereby helping the abutment strips 5 to push the elastic sheet 4 to deform outward to expand the cross-section of the spiral channel.

[0033] Reference Figure 2 and Figure 4, a first magnet 11 is fixed to the side of the abutment bar 5 away from the corresponding elastic sheet 4, and a second magnet 12 is fixed to the end of the guide rail 14 close to the opening and closing plate 3. The first magnet 11 is used to be adsorbed and fixed with the second magnet 12 on the corresponding guide rail 14. When the first magnet 11 is adsorbed and fixed with the corresponding second magnet 12, the abutment bar 5 is separated from the elastic sheet 4, and the abutment bar 5 is filled with the corresponding guide rail 14, so that the soil is not easily blocked in the guide rail 14. The sum of the adsorption forces of the two first magnets 11 and the second magnet 12 is less than the gravity of the sand and stone. The bonding and fixing of the first magnet 11 and the second magnet 12 helps to fix the abutment bar 5 in the initial state, so that when the hollow tube 2 is screwed into the soil, the abutment bar 5 is not easy to move, and the soil will not be blocked in the guide rail 14.

[0034] Reference Figure 2 and Figure 4 A sliding bar 15 is slidably provided on the outer wall of the connecting block 9. The sliding bar 15 is arc-shaped. The elastic sheet 4 is fixed on the sliding bar 15 on the same side. The elastic sheet 4 is an arc sheet. The elastic sheet 4 and the sliding bar 15 are both convex in the direction away from the hollow tube 2, so that the elastic sheet 4 and the corresponding connecting block 9 are slidably connected through the sliding bar 15. The sliding direction of the sliding bar 15 and the elastic sheet 4 is parallel to the hollow tube 2 away from the turntable 1 (refer to Figure 1 ) in the axial direction of one end, a second transmission member is arranged on the elastic sheet 4, and the second transmission member is used to drive the elastic sheet 4 to move in the direction away from the hollow tube 2 when the opening and closing plate 3 rotates in the direction away from the hollow tube 2.

[0035] Reference Figure 2 and Figure 4 In order to facilitate the opening and closing plate 3 to rotate in the direction away from the hollow tube 2 and drive the elastic sheet 4 to move in the direction away from the hollow tube 2, the second transmission member includes a limit block 10, the limit block 10 is fixed to the side of the elastic sheet 4 away from the abutment strip 5, the limit block 10 extends toward the opening and closing plate 3, the extension direction of the limit block 10 is perpendicular to the moving direction of the sliding strip 15, and the limit block 10 is located on the side of the opening and closing plate 3 away from the hollow tube 2.

[0036] Reference Figure 2 and Figure 4 A fixing block 13 is fixed to the side of the connecting block 9 away from the abutment strip 5. The fixing block 13 is located on the side of the corresponding elastic sheet 4 close to the hollow tube 2. An adhesive member for bonding and fixing the sliding strip 15 and the elastic sheet 4 is provided on the fixing block 13. Specifically, the adhesive member includes a third magnet (not shown in the figure) fixed to the fixing block 13 and a fourth magnet fixed to the sliding strip 15. When the third magnet and the fourth magnet are bonded and fixed, the side of the elastic sheet 4 away from the fixing block 13 is flush with the side of the abutment strip 5 away from the connecting block 9. In other embodiments, the third magnet and the fourth magnet can be replaced by Velcro, and the relative fixation of the elastic sheet 4 can also be achieved by bonding and matching the two Velcros.

[0037] When the hollow tube 2 is screwed into the soil, the third magnet and the fourth magnet are bonded and fixed so that the elastic sheet 4 is attached to the outer wall of the corresponding connecting block 9, so that during the rotation of the hollow tube 2, the elastic sheet 4 is not easily deformed by the squeezing of the soil; when the opening and closing plate 3 rotates in the direction away from the hollow tube 2, it will first abut the limit block 10 to disengage the third magnet from the fourth magnet. Since the hollow tube 2 is spiral and the connecting block 9 is inclined, the sliding bar 15 and the elastic sheet 4 will be moved in the direction away from the hollow tube 2 under the action of gravity, so that the elastic sheet 4 extends out of the connecting block 9, and then the abutting bar 5 is aligned with the middle part of the elastic sheet 4, so that the abutting bar 5 abuts the elastic sheet 4 to deform and evert in the direction away from the hollow tube 2.

[0038] The implementation principle of the highway soft foundation treatment structure of the embodiment of the present application is: when in use, the opening and closing plate 3 abuts against the end of the hollow tube 2 away from the turntable 1 under the action of the torsion spring 7 to close the hollow tube 2, and the third magnet and the fourth magnet are adsorbed and matched to make the elastic sheet 4 fit on the outer wall of the connecting block 9. At this time, the limit block 10 is located on the side of the opening and closing plate 3 away from the hollow tube 2, and then the first magnet 11 and the second magnet 12 are adsorbed and matched to make the abutment bar 5 and the connecting rod 8 in the initial position.

[0039] Then, the turntable 1 and the hollow tube 2 are driven to rotate and move, so that the hollow tube 2 is rotated into the ground. After the lower end of the hollow tube 2 is rotated into the ground to a certain depth, the movement of the hollow tube 2 is stopped. At this time, the opening and closing plate 3 is squeezed by the soil. Then, sand and gravel are loaded into the hollow tube 2 from the upper end of the hollow tube 2. Since the opening and closing plate 3 is squeezed by the soil at this time, it will not rotate in the direction away from the hollow tube 2; then, the hollow tube 2 is continued to be driven to rotate into the soft foundation. When it is rotated to the required depth, the hollow tube 2 forms a spiral channel in the soft foundation; then, the hollow tube 2 is driven to rotate and move in the opposite direction, so that the hollow tube 2 is gradually rotated out of the soft foundation. When the opening and closing plate 3 is not abutted by the soil, the sand and gravel in the hollow tube 2 abuts against the opening and closing plate 3 under the action of gravity and rotates in the direction away from the hollow tube 2 to gradually open the hollow tube 2.

[0040] Then the opening and closing plate 3 first abuts the limit block 10 and moves in the direction away from the hollow tube 2, so that the third magnet is disengaged from the fourth magnet, and the sliding bar 15 and the elastic sheet 4 are away from the hollow tube 2 under the action of gravity. Then the opening and closing plate 3 abuts the mutual hinge of the two connecting rods 8, so that the connecting rod 8 pushes the corresponding abutting bar 5 to move in the direction close to the elastic sheet 4, thereby helping the abutting bar 5 to push the elastic sheet 4 to turn outward, so that the elastic sheet 4 squeezes the inner wall of the spiral channel to expand the cross-section of the spiral channel, and sand and gravel fall along the hollow tube 2 into the spiral channel in the soft foundation to form spiral piles. Through the equipment of the present application, the cross-sectional area of ​​the spiral channel can be expanded to a certain extent without changing the cross-sectional area of ​​the hollow tube 2, which helps to expand the contact area between sand and gravel and the soft foundation, and further ensure the safety of vehicle operation on the road surface.

[0041] The present application also discloses a construction method for treating soft foundation of a highway. The construction method for treating soft foundation of a highway uses the above-mentioned structure for treating soft foundation of a highway, and further includes the following steps: Step 1, pre-treatment: clean and survey the road surface to be treated, and crush the road surface rocks by crusher; Step 2, spiral pile forming: the equipment is placed on both sides of the pre-treated road surface, and the opening and closing plate 3 closes the end of the hollow tube 2 away from the turntable 1 under the action of the torsion spring 7, and then the turntable 1 and the hollow tube 2 are driven to rotate and move, so that the hollow tube 2 is screwed into the ground to a certain depth, and then the hollow tube 2 stops moving, and then sand and gravel are loaded into the hollow tube 2 from the upper end of the hollow tube 2, and then the hollow tube 2 continues to be screwed into the soft foundation and rotated to the required depth. The hollow tube 2 forms a spiral channel in the soft foundation, and then the hollow tube 2 is driven to move in the opposite direction and gradually screwed out of the soft foundation, so that the opening and closing plate 3 is no longer squeezed by the soil, and the weight of the sand and gravel in the hollow tube 2 Under the action of force, it rotates in the direction away from the hollow tube 2, gradually opening the hollow tube 2, then the opening and closing plate 3 abuts against the limit block 10 to drive the elastic sheet 4 and the sliding bar 15 to move in the direction away from the hollow tube 2, then the opening and closing plate 3 abuts against one end of the two connecting rods 8 hinged to each other, pushing the connecting rod 8, so that the connecting rod 8 pushes the abutting bar 5 to move in the direction close to the elastic sheet 4, and the abutting bar 5 pushes the elastic sheet 4 to deform and evert in the direction away from the hollow tube 2. In the process of the hollow tube 2 being screwed out, the elastic sheet 4 squeezes the inner wall of the spiral channel to expand the spiral channel, and the sand and gravel in the hollow tube 2 are transported along the hollow tube 2 to the soft foundation to form a spiral pile; Step 3, paving and compacting: Use a road compactor to flatten the road surface.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A highway soft foundation treatment structure, comprising a turntable (1) and a hollow tube (2) arranged on the turntable (1), characterized in that: An opening and closing plate (3) is hingedly connected to the pipe mouth of the hollow tube (2) at one end away from the rotating disk (1); the hollow tube (2) is provided with an adjusting member for adjusting the opening and closing plate (3) to rotate in a direction close to the hollow tube (2); an elastic sheet (4) is provided at one end of the hollow tube (2) away from the rotating disk (1); the elastic sheet (4) is located on the side of the opening and closing plate (3) away from the hollow tube (2); an abutment bar (5) is slidably provided at one end of the hollow tube (2) away from the rotating disk (1); the abutment bar (5) is located between the elastic sheet (4) and the opening and closing plate (3); the hollow tube (2) is provided with a first transmission member, the first transmission member is used to make the opening and closing plate (3) rotate in a direction away from the hollow tube (2) to open the hollow tube (2), so as to push the abutment bar (5) to move in a direction close to the elastic sheet (4).

2. A highway soft foundation treatment structure according to claim 1, characterized in that: The opening and closing plate (3) is provided with a rotating shaft (6), and the rotating shaft (6) is rotatably arranged on the inner wall of the hollow tube (2). The adjusting member comprises a torsion spring (7) sleeved on the rotating shaft (6), one end of the torsion spring (7) is arranged on the inner wall of the hollow tube (2), and the other end is arranged on the opening and closing plate (3). When the torsion spring (7) is in a natural state, the opening and closing plate (3) closes the corresponding end of the hollow tube (2).

3. A highway soft foundation treatment structure according to claim 2, characterized in that: Two elastic sheets (4) are arranged opposite to each other, the opening and closing plate (3) is located between the two elastic sheets (4), the abutment strips (5) correspond to the elastic sheets (4) one by one, and the abutment strips (5) are located between the corresponding elastic sheets (4) and the opening and closing plate (3).

4. A highway soft foundation treatment structure according to claim 3, characterized in that: The first transmission member comprises a connecting rod (8) hinged on the abutment bar (5), the abutment bar (5) is aligned with the side of the opening and closing plate (3) close to the rotating shaft (6), the two connecting rods (8) on the abutment bars (5) are hinged to each other, the hinge axis of the connecting rod (8) is perpendicular to the hinge axis of the opening and closing plate (3), the connecting rod (8) extends toward the side of the abutment bar (5) away from the rotating shaft (6), and the opening and closing plate (3) is used to abut against one end of the two connecting rods (8) hinged to each other.

5. A highway soft foundation treatment structure according to claim 2, characterized in that: When the opening and closing plate (3) abuts against the inner wall of the hollow tube (2) to close the hollow tube (2), the end of the opening and closing plate (3) away from the rotating shaft (6) tilts toward the end of the hollow tube (2) away from the rotating disk (1).

6. A highway soft foundation treatment structure according to any one of claims 1 to 5, characterized in that: A connecting block (9) is arranged opposite to the end of the hollow tube (2) away from the rotating disk (1), and the connecting block (9) corresponds to the elastic sheet (4) one by one. The elastic sheet (4) is slidably arranged on the corresponding connecting block (9), and the sliding direction of the elastic sheet (4) is parallel to the axial direction of the end of the hollow tube (2) away from the rotating disk (1). The abutment strip (5) is slidably arranged on the connecting block (9) on the corresponding side, and a second transmission member is arranged on the elastic sheet (4), and the second transmission member is used to drive the elastic sheet (4) to move in the direction away from the hollow tube (2) when the opening and closing plate (3) rotates in the direction away from the hollow tube (2).

7. A highway soft foundation treatment structure according to claim 6, characterized in that: The second transmission member comprises a limit block (10) arranged on a side of the elastic sheet (4) away from the hollow tube (2), the limit block (10) extending in a direction close to the opening and closing plate (3), and the limit block (10) is located on a side of the opening and closing plate (3) away from the hollow tube (2).

8. A highway soft foundation treatment structure according to claim 6, characterized in that: The abutment strip (5) is provided with a first magnet (11), and the connection block (9) is provided with a second magnet (12). The first magnet (11) is used to be adsorbed and fixed with the second magnet (12) on the corresponding connection block (9). When the first magnet (11) is adsorbed and fixed with the corresponding second magnet (12), the abutment strip (5) and the elastic sheet (4) are in a disengaged state.

9. A highway soft foundation treatment structure according to claim 6, characterized in that: The connecting block (9) is provided with a fixing block (13), the fixing block (13) being located on a side of the corresponding elastic sheet (4) close to the hollow tube (2), and the fixing block (13) is provided with an adhesive member for bonding and fixing the elastic sheet (4), and when the adhesive member is bonding and fixing the elastic sheet (4), a side of the elastic sheet (4) away from the fixing block (13) is flush with a side of the abutting strip (5) away from the connecting block (9).

10. A construction method for treating soft foundation of a highway, using the soft foundation treatment structure of a highway as claimed in any one of claims 1 to 9, characterized in that: The following steps are also included: Pre-treatment: clean and survey the road surface to be treated, and crush the road surface rocks with a crusher; Screw pile forming: the equipment is placed on both sides of the pre-treated road surface, and the opening and closing plate (3) is adjusted by the adjusting member to close the end of the hollow tube (2) away from the turntable (1), and the turntable (1) and the hollow tube (2) are driven to rotate and move, so that the hollow tube (2) is screwed into the ground, and then sand and gravel are loaded into the hollow tube (2) from the upper end, so that the hollow tube (2) is screwed into the soft foundation to the required depth, and the hollow tube (2) forms a spiral channel in the soft foundation, and then the hollow tube (2) is driven to be gradually screwed out of the soft foundation, and at the same time When the opening and closing plate (3) rotates in a direction away from the hollow tube (2) under the action of the gravity of the sand and gravel to open the hollow tube (2), the abutment bar (5) is pushed by the first transmission member to move in a direction close to the elastic sheet (4), and the abutment bar (5) pushes the elastic sheet (4) to deform and turn outward in a direction away from the hollow tube (2). During the process of the hollow tube (2) being screwed out, the elastic sheet (4) abuts against the inner wall of the spiral channel to expand the spiral channel, and the sand and gravel in the hollow tube (2) are transported along the hollow tube (2) into the soft foundation to form a spiral pile; Paving and compaction: The road surface is flattened using a road compactor.

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