阅读说明：本技术 一种采用钢筋笼石笋桩的路基加固结构及其施工工艺 (Roadbed reinforcing structure adopting steel reinforcement cage bamboo shoot piles and construction process of roadbed reinforcing structure ) 是由 计立华 于 2020-12-11 设计创作，主要内容包括：本申请涉及一种采用钢筋笼石笋桩的路基加固结构及其施工工艺,涉及公路工程的领域,其包括软土层以及软土层下方的硬土层,软土层内设置有两道挡墙,两道挡墙分别位于路面宽度方向的两侧,挡墙的长度方向与路面的长度方向相同,挡墙是由若干个石笋桩相互抵接而成,石笋桩的底端埋设在硬土层内,石笋桩包括钢筋笼以及填充在钢筋笼内部的碎石芯,两道挡土墙相互远离的一侧均挖设有排水沟,排水沟内设置有第一碎石层。本申请具有减少路基中软土层内的地下水,提高地基中软土层的密实度,从而提高了路基的支撑强度和稳定性的效果。(The utility model relates to an adopt roadbed reinforced structure of steel reinforcement cage stone bamboo shoot stake and construction process thereof, relate to highway engineering's field, it includes soft soil layer and the hard soil layer of soft soil layer below, be provided with twice barricade in the soft soil layer, twice barricade is located road surface width direction's both sides respectively, the length direction of barricade is the same with the length direction on road surface, the barricade is formed by the mutual butt of a plurality of stone bamboo shoot stake, the bottom of stone bamboo shoot stake is buried underground in the hard soil layer, the stone bamboo shoot stake includes steel reinforcement cage and fills the rubble core in steel reinforcement cage inside, one side that two way barricades the wall and keeps away from each other all digs and is equipped with the escape canal, be provided. This application has the intraformational groundwater of soft soil in the reduction road bed, improves the closely knit degree on soft soil layer in the ground to the effect of the support intensity and the stability of road bed has been improved.)

1. The utility model provides an adopt roadbed reinforced structure of steel reinforcement cage stone bamboo shoot stake, hard soil layer (2) including soft soil layer (1) and soft soil layer (1) below, a serial communication port, be provided with twice barricade in soft soil layer (1), the twice barricade is located road surface width direction's both sides respectively, the length direction of barricade is the same with the length direction on road surface, the barricade is formed by the mutual butt of a plurality of stone bamboo shoot stake (3), the bottom of stone bamboo shoot stake (3) is buried underground in hard soil layer (2), stone bamboo shoot stake (3) include steel reinforcement cage (31) and pack at inside rubble core (32) of steel reinforcement cage (31), one side that two retaining walls kept away from each other all digs and is equipped with escape canal (11), be provided with first rubble layer (8) in escape canal (11).

2. The roadbed reinforcement structure adopting the steel reinforcement cage bamboo shoot piles as claimed in claim 1, wherein a plurality of vertical fixing columns (321) are embedded in the gravel core (32), the bottom ends of the fixing columns (321) extend to the lower part of the bamboo shoot piles (3) and are inserted into the hard soil layer (2).

3. A roadbed reinforcement structure adopting a steel reinforcement cage bamboo shoot pile according to claim 1, wherein a drainage groove (13) is arranged below the first gravel layer (8), the top surface of the drainage groove (13) is open, and the top surface of the drainage groove (13) is covered with a steel wire mesh (15).

4. The roadbed reinforcement structure adopting the steel reinforcement cage bamboo shoot piles as claimed in claim 1, wherein a steel plate (4), a second gravel layer (5), a first backfill soil layer (6) and an asphalt layer (7) are sequentially arranged above a soft soil layer (1) between two retaining walls from bottom to top.

5. The roadbed reinforcement structure adopting the steel reinforcement cage bamboo shoot piles as claimed in claim 4, wherein a plurality of vertical reinforcement columns (41) are inserted on the steel plate (4), and the bottom ends of the reinforcement columns (41) penetrate through the soft soil layer (1) and are inserted in the hard soil layer (2).

6. The roadbed reinforcing structure adopting the steel reinforcement cage bamboo shoot piles as claimed in claim 1, wherein a water suction pump (16) is arranged above the soft soil layer (1), a water suction pipe (161) is installed on the water suction pump (16), and one end, far away from the water suction pump (16), of the water suction pipe (161) extends into the drainage ditch (11).

7. A roadbed reinforcement structure adopting reinforcement cage bamboo shoot piles as claimed in claim 3, wherein the bottom surfaces of the drainage ditches (11) and the side surfaces far away from the bamboo shoot piles (3) are provided with waterproof layers (12).

8. A roadbed reinforcement structure adopting a steel reinforcement cage bamboo shoot pile, which is characterized in that a geotextile layer (14) is fixedly arranged below the steel wire mesh (15).

9. A roadbed reinforcement structure adopting reinforcement cage bamboo shoot piles according to claim 3, characterized in that a third gravel layer (9) is arranged above the first gravel layer (8), and a second backfill layer (10) is arranged above the third gravel layer (9).

10. The construction process of the roadbed reinforcement structure according to any one of the claims 1 to 9, wherein the construction process comprises the following steps:

s1: digging drainage ditches (11) on two sides of the width direction of the road surface, putting a plurality of stone bamboo shoot piles (3) which are mutually abutted into one side of each drainage ditch (11) which is close to each other to form two retaining walls, extruding the two retaining walls towards the direction which is close to each other, embedding the bottom ends of the stone bamboo shoot piles (3) in a hard soil layer (2) downwards, and vertically downwards driving a plurality of fixed columns (321) into a stone core (32) to ensure that the bottom ends of the fixed columns (321) are inserted into the hard soil layer (2);

s2: arranging a drainage groove (13) on one side, far away from each other, of two retaining walls in a drainage ditch (11), covering a reinforcing mesh on the top surface of the drainage groove (13), paving broken stones on the reinforcing mesh to form a first broken stone layer (8), placing a water suction pump (16) on a soft soil layer (1), and inserting a water suction pipe (161) on the water suction pump (16) into the drainage groove (13);

s3: laying a steel plate (4) on a soft soil layer (1) between two retaining walls, then laying broken stones on the steel plate (4) to form a second broken stone layer (5), then filling a first backfill soil layer (6) on the second broken stone layer (5), and laying an asphalt layer (7) on the first backfill soil layer (6);

s4: and paving broken stones on the first crushed stone layer (8) to form a third crushed stone layer (9), and filling a second backfill soil layer (10) on the third crushed stone layer (9).

Technical Field

The application relates to the field of highway engineering, in particular to a roadbed reinforcing structure adopting reinforcement cage bamboo shoot piles and a construction process thereof.

Background

The roadbed is the foundation of the road surface, provides necessary conditions for pavement laying and driving operation, and bears static load and dynamic load of the road surface and traffic load. For soft soil areas, the subgrade in the soft soil area is generally treated to ensure the bearing capacity and stability of the pavement.

At present, the roadbed treatment method in the soft soil area mainly adopts a digging and filling method, namely digging and filling soft soil, and adopting qualified filling materials to carry out layered rolling and backfilling. In view of the above-mentioned related technologies, the inventor believes that a large amount of groundwater exists in the soft soil layer in the soft soil region, and if the groundwater is not treated, even if the soil layer in the soft soil region is excavated and backfilled, the groundwater can permeate into the backfilled soil layer again, so that the density of the roadbed is low, the supporting strength of the roadbed on the road surface is limited, and the situation of road surface collapse can often occur, which affects the normal operation of road traffic.

Disclosure of Invention

In order to reduce the intraformational groundwater of soft soil in the road bed, improve the closely knit degree of soft soil layer in the ground to improve the support intensity and the stability of road bed, this application provides a road bed reinforced structure who adopts steel reinforcement cage stone bamboo shoot pile and construction process thereof.

First aspect, this application provides an adopt roadbed reinforced structure of steel reinforcement cage stone bamboo shoot pile, adopts following technical scheme:

the utility model provides an adopt roadbed reinforced structure of steel reinforcement cage stone bamboo shoot stake, hard soil layer including soft soil layer and soft soil layer below, be provided with twice barricade in the soft soil layer, twice barricade is located road surface width direction's both sides respectively, the length direction of barricade is the same with the length direction on road surface, the barricade is formed by the mutual butt of a plurality of stone bamboo shoot stake, the bottom of stone bamboo shoot stake is buried underground in hard soil layer, the stone bamboo stake includes steel reinforcement cage and fills the rubble core in steel reinforcement cage inside, one side that two barricades were kept away from each other all digs and is equipped with the escape canal, be provided with first metalling in the escape.

Through adopting above-mentioned technical scheme, in the work progress, the twice barricade can extrude the soft soil layer between the twice barricade, make intraformational groundwater of weak soil can be extruded, and flow through in the gap by steel reinforcement cage and the stone bamboo shoot stake, and then flow to the one side that the twice barricade was kept away from each other, then flow down to the escape canal bottom in the gap between by first metalling, thereby the intraformational groundwater of weak soil in the road bed has effectively been reduced, the closely knit degree on soft soil layer in the ground has been improved, the support intensity and the stability of road bed have been improved, the phenomenon that the road surface appears collapsing has been reduced.

Preferably, a plurality of vertical fixing columns are embedded in the gravel core, the bottom ends of the fixing columns extend to the lower portion of the stalagmite pile, and the fixing columns are inserted into the hard soil layer.

Through adopting above-mentioned technical scheme, set up the fixed column in the rubble core to the bottom that makes the fixed column is inserted and is established in hard soil layer, can play support and additional strengthening to the stalagmite stake, has effectively improved the structural strength and the stability of stalagmite stake, avoids the stalagmite stake to take place to incline or remove and makes groundwater flow back again to the weak soil layer between the twice barricade in, ensures the extrusion effect of twice barricade to soft soil layer.

Preferably, a drainage groove is arranged below the first gravel layer, the top surface of the drainage groove is in an open shape, and a steel wire mesh is covered on the top surface of the drainage groove.

Through adopting above-mentioned technical scheme, set up the water drainage tank in the escape canal, the intraformational groundwater of weak soil flows down the back from first metalling, can pass the wire net and flow to the water drainage tank in, the water drainage tank can play to store and collect the effect to groundwater, further avoids groundwater to flow back again to the weak soil layer between the twice barricade in.

Preferably, the steel plate, the second gravel layer, the first backfill soil layer and the asphalt layer are sequentially arranged above the soft soil layer between the retaining walls from bottom to top.

Through adopting above-mentioned technical scheme, set up the steel sheet on soft soil layer, the second metalling, behind first backfill layer and the pitch layer, the steel sheet can compress tightly on soft soil layer, and to the second metalling of its top, first backfill layer and pitch layer play the stabilizing support effect, the infiltration effect on road surface can be ensured on the metalling, also can play the supporting role to the pitch layer simultaneously, first backfill layer can strengthen the closely knit degree of pitch layer below, further improve the supporting effect to the pitch layer, the intensity and the stability on road surface can be ensured on the pitch layer, thereby the structural strength of weak soil district road bed has effectively been improved.

Preferably, a plurality of vertical reinforcing columns are inserted into the steel plate, and the bottom ends of the reinforcing columns penetrate through the soft soil layer and are inserted into the hard soil layer.

Through adopting above-mentioned technical scheme, wear to establish the enhancement post at the steel sheet setting to make the bottom of strengthening the post insert and establish in hard soil layer, strengthen the post and can play the supporting role to the steel sheet, improved the stability of steel sheet, and then strengthened the steel sheet to the supporting role on the second metalling, first backfill soil layer and the pitch layer of its top, further improved the structural strength of weak soil district road bed.

Preferably, soft soil layer top sets up the suction pump, installs the drinking-water pipe on the suction pump, and the one end that the drinking-water pump was kept away from to the drinking-water pipe extends to in the escape canal.

Through adopting above-mentioned technical scheme, in the work progress, the intraformational groundwater of soft soil is extruded to the escape canal back by twice barricade, and the suction pump can be with the groundwater pump pumping in the escape canal to subaerial, not only realizes the drainage process to groundwater, also can further avoid the groundwater in the escape canal to flow back again to the soft soil layer between the twice barricade in, has improved the closely knit degree in roadbed below soft soil layer.

Preferably, the bottom surface of escape canal and the side of keeping away from the stone bamboo shoot stake all are provided with the waterproof layer.

Through adopting above-mentioned technical scheme, set up the waterproof layer in the escape canal, the waterproof layer can play the isolation to the groundwater in the escape canal, not only is convenient for carry out centralized processing and collection to the groundwater in the escape canal, also can avoid the escape canal to keep away from in the intraformational a large amount of offal of soft soil of stone bamboo shoot pile one side and flow to the escape canal.

Preferably, a geotextile layer is fixedly arranged below the steel wire mesh.

Through adopting above-mentioned technical scheme, set up the geotechnological cloth layer below the steel wire mesh, the geotechnological cloth layer can make the groundwater under the first rubble laminar flow pass through, and in the water drainage tank under the cocurrent flow, can also play the isolation to the rubble and the soil of its top, avoid rubble and soil to pile up in the water drainage tank through the geotechnological cloth layer and to prevent that the water drainage tank from receiving the influence to the collection effect of groundwater.

Preferably, a third gravel layer is arranged above the first gravel layer, and a second backfill soil layer is arranged above the third gravel layer.

Through adopting above-mentioned technical scheme, set up third rubble layer and second backfill soil layer on first rubble layer, can not only play the effect of sheltering from to the top on third rubble layer, also can improve the closely knit degree that road surface one side was kept away from to the stone bamboo shoot stake, further improve the stability of soft soil district road bed.

The second aspect, this application provides an adopt roadbed reinforced structure's of steel reinforcement cage stone bamboo shoot pile construction process, adopts following technical scheme:

a construction process of a roadbed reinforcing structure adopting steel bar cage bamboo shoot piles comprises the following steps:

s1: digging drainage ditches on two sides of the width direction of the road surface, putting a plurality of stone bamboo shoot piles which are mutually abutted into one side of each drainage ditch which is mutually close to each other to form two retaining walls, extruding the two retaining walls towards the mutually close direction, embedding the bottom ends of the stone bamboo shoot piles in hard soil downwards, and vertically driving a plurality of fixed columns downwards into the stone cores to enable the bottom ends of the fixed columns to be inserted in the hard soil;

s2: arranging a drainage channel on one side, far away from each other, of two retaining walls in the drainage ditch, covering a reinforcing mesh on the top surface of the drainage channel, laying broken stones on the reinforcing mesh to form a first broken stone layer, placing a water suction pump on the soft soil layer, and inserting a water suction pipe on the water suction pump into the drainage channel;

s3: laying a steel plate on a soft soil layer between two retaining walls, laying broken stones on the steel plate to form a second broken stone layer, filling a first backfill soil layer on the second broken stone layer, and laying an asphalt layer on the first backfill soil layer;

s4: and paving broken stones on the first broken stone layer to form a third broken stone layer, and then filling a second backfill soil layer on the third broken stone layer.

By adopting the technical scheme, during construction, the two retaining walls are extruded towards the direction close to each other, so that underground water in the soft soil layer between the two retaining walls can be extruded into the drainage ditch, and the stalagmite pile is fixed in the hard soil layer, so that the stability of the stalagmite pile is ensured; the water suction pump can pump out the underground water in the drainage ditch, so that the underground water is prevented from flowing back to the soft soil layer between the two retaining walls; and (3) a steel plate. The second gravel layer, the first backfill soil layer and the asphalt layer can improve the structural strength of the roadbed and reinforce the roadbed; the first gravel layer and the third gravel layer can ensure the flow smoothness of underground water, and can play a role in stably supporting the second backfill soil layer, so that the supporting strength and the stability of the roadbed are further improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. two retaining walls are arranged on two sides of a soft soil layer below the road surface, and the retaining walls extrude the soft soil layer, so that underground water in the soft soil layer in the roadbed is effectively reduced, the compactness of the soft soil layer in the foundation is improved, the supporting strength and the stability of the roadbed are improved, and the phenomenon of collapse of the road surface is reduced;

2. the fixing columns are arranged in the broken stone cores, so that the supporting and reinforcing effects on the stalagmite piles can be achieved, and the structural strength and the stability of the stalagmite piles are effectively improved;

3. through setting up water drainage tank, the intraformational groundwater of soft soil can pass and flow to water drainage tank in from first metalling, avoids groundwater to flow back again to the soft soil layer between the twice barricade in.

Drawings

FIG. 1 is a schematic structural diagram of the present application;

fig. 2 is a sectional view intended to show a reinforcing column.

Description of reference numerals: 1. a soft soil layer; 11. a drainage ditch; 12. a waterproof layer; 13. a water discharge tank; 14. a geotextile layer; 15. steel wire mesh; 16. a water pump; 161. a water pumping pipe; 2. a hard soil layer; 3. piling the stalagmite; 31. a reinforcement cage; 32. a stone core; 321. fixing a column; 4. a steel plate; 41. a reinforcement column; 5. a second crushed stone layer; 6. a first backfill soil layer; 7. an asphalt layer; 8. a first crushed stone layer; 9. a third crushed stone layer; 10. and a second backfill soil layer.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a roadbed reinforcing structure adopting steel reinforcement cage bamboo shoot piles.

Referring to fig. 1, a roadbed reinforced structure adopting steel reinforcement cage stone bamboo shoot piles, including soft soil layer 1 and hard soil layer 2 of 1 below of soft soil layer, be provided with the parallel barricade of twice in the soft soil layer 1, the barricade of twice is located road surface width direction's both sides respectively, 1 tops of soft soil layer between the barricade of twice have set gradually steel sheet 4 from bottom to top, second metalling 5, first backfill soil layer 6 and pitch layer 7, one side that two retaining walls kept away from each other all digs and is equipped with escape canal 11.

Referring to fig. 1, the length direction of barricade is the same with the length direction on road surface, and the barricade is formed by the mutual butt of a plurality of stalagmite 3, and stalagmite 3 is vertical to be set up, and the bottom of stalagmite 3 is buried underground in hardpan 2, and the top of stalagmite 3 is higher than the top surface of pitch layer 7. The shiitake pile 3 comprises a reinforcement cage 31 and a gravel core 32, the cross section of the reinforcement cage 31 is rectangular, the gravel core 32 is formed by filling a plurality of gravels filled in the reinforcement cage 31, and the diameter range of the gravels in the gravel core 32 is 30-50 mm. Referring to fig. 2, a plurality of vertical fixing columns 321 are embedded in the gravel core 32, the top surfaces of the fixing columns 321 are flush with the top surface of the gravel core 32, the bottom ends of the fixing columns 321 extend to the lower side of the stone bamboo shoot piles 3, and the bottom ends of the fixing columns 321 are pointed and inserted into the hard soil layer 2.

After the barricade is all set up in road surface width direction's both sides, through all extrude the twice barricade towards the direction that is close to each other, can make the groundwater of soft soil layer 1 between the twice barricade extrude to flow to escape canal 11 in the gap through steel reinforcement cage 31 and rubble core 32, thereby effectively reduced the groundwater in the soft soil layer 1 in the road bed, improved the closely knit degree of soft soil layer 1 in the ground, thereby improved the support intensity and the stability of road bed.

Referring to fig. 2, the steel plate 4 is horizontally laid on the soft soil layer 1 between two retaining walls, a plurality of vertical reinforcing columns 41 are inserted into the steel plate 4, the top ends of the reinforcing columns 41 are higher than the top surface of the steel plate 4 and are inserted into the second gravel layer 5, the reinforcing columns 41 are arranged in the soft soil layer 1 in a penetrating manner, and the bottom ends of the reinforcing columns 41 are pointed and inserted into the hard soil layer 2. The second gravel layer 5 is formed by paving a plurality of gravel stones with the diameter ranging from 20mm to 30 mm.

Steel sheet 4 can compress tightly on the soft soil layer 1 between the gauge outfit for a journey barricade, plays the steady supporting role to second metalling 5, first backfill soil layer 6 and pitch layer 7, and reinforced column 41 can play enhancement and supporting role to steel sheet 4, makes the pressure that the reinforcing plate received can transmit in hardpan 2, plays the reinforcing role to the road bed, and then has effectively improved soft soil district road bed support intensity and stability.

Referring to fig. 2, a first gravel layer 8, a third gravel layer 9 and a second backfill soil layer 10 are sequentially arranged in a drainage ditch 11 from bottom to top, the first gravel layer 8 is formed by paving a plurality of gravels with the diameter ranging from 30mm to 50mm, and the top surface of the first gravel layer 8 is higher than that of the soft soil layer 1 between two retaining walls; the third gravel layer 9 is formed by paving a plurality of gravel with the diameter ranging from 20mm to 30 mm; the top surface of the second backfill layer 10 is flush with the top surface of the bitumen layer 7. First rubble layer 8, third rubble layer 9 and second backfill soil layer 10 can play the stable supporting effect to the road surface both sides, have further improved soft soil district road bed support intensity and stability.

Groundwater in the wall is kept off in the twice passes through 3 circulation value escape canals 11 backs of stone bamboo shoot stake, can flow down through the gap in third rubble layer 9 and the first rubble layer 8 to flow to the bottom of escape canal 11, ensure the infiltration of groundwater, be convenient for collect groundwater.

Referring to fig. 1, waterproof layers 12 are laid on the bottom surface of the drainage ditch 11 and the side surface far away from the stone bamboo shoot piles 3. Drainage tank 13 is provided with below the first rubble layer 8, and drainage tank 13's top surface is the opening form, and drainage tank 13's top surface lid is equipped with horizontally wire net 15, and wire net 15's bottom surface is fixed and is provided with geotechnological cloth layer 14. A water suction pump 16 is arranged above the soft soil layer 1 on one side, away from the retaining wall, of the drainage ditch 11, a water suction pipe 161 is arranged on the water suction pump 16, and one end, away from the water suction pump 16, of the water suction pipe 161 sequentially penetrates through the second backfill soil layer 10, the third gravel layer 9, the first gravel layer 8, the steel wire mesh 15 and the geotextile layer 14 and is communicated with the inside of the drainage groove 13.

After groundwater in the two retaining walls flows down from the gap in third rubble layer 9 and first rubble layer 8, can pass wire net 15 and geotechnological cloth layer 14, then flow to in water drainage tank 13, the groundwater in water drainage tank 13 can be taken out through drinking-water pipe 161 to suction pump 16 this moment, realizes the discharge process of groundwater, avoids the groundwater too much in water drainage tank 13 and flows back again to in the soft soil layer 1 between the two retaining walls.

The embodiment of the application relates to a roadbed reinforcement structure adopting reinforcement cage bamboo shoot piles, and the implementation principle is as follows: after the barricade is all set up in road surface width direction's both sides, through all extrude the direction that is close to each other with twice barricade, can make the groundwater of soft soil layer 1 between the twice barricade extrude, and flow to in escape canal 11 in the gap through steel reinforcement cage 31 and rubble core 32, then flow down through the gap in third rubble layer 9 and the first rubble layer 8, pass wire net 15 and geotechnological cloth layer 14 again, flow to in the water drainage tank 13 at last, the suction pump 16 can be taken out the groundwater in water drainage tank 13 through drinking-water pipe 161 this moment, avoid the groundwater in water drainage tank 13 too much and flow back again to in the soft soil layer 1 between twice barricade, thereby effectively reduced the groundwater in soft soil layer 1 in the road bed, the closely knit degree of soft soil layer 1 in the ground has been improved, thereby the support intensity and the stability of road bed have been improved.

The embodiment of the application further discloses a construction process of the roadbed reinforcing structure adopting the steel reinforcement cage 31 bamboo shoot piles 3 in the shallow soft soil area.

A construction process of a roadbed reinforcing structure adopting steel bar cage bamboo shoot piles comprises the following steps:

s1: digging drainage ditches 11 on two sides of the width direction of the road surface, putting a plurality of stone bamboo shoot piles 3 which are mutually abutted into one side of each drainage ditch 11 which is close to each other to form two retaining walls, extruding the two retaining walls towards the direction which is close to each other, embedding the bottom ends of the stone bamboo shoot piles 3 downwards into the hard soil layer 2, and vertically driving a plurality of fixing columns 321 downwards into the stone core 32 to enable the bottom ends of the fixing columns 321 to be inserted into the hard soil layer 2;

s2: the method comprises the steps of placing a prefabricated drainage groove 13 on one side, away from each other, of two retaining walls in a drainage ditch 11, covering a reinforcing mesh on the top surface of the drainage groove 13, paving broken stones with the diameter ranging from 30mm to 50mm on the reinforcing mesh to form a first gravel layer 8, placing a water suction pump 16 on a soft soil layer 1, enabling a water suction pipe 161 on the water suction pump 16 to penetrate through the first gravel layer 8, the reinforcing mesh and a geotextile layer 14, and inserting the water suction pipe into the drainage groove 13.

S3: laying a steel plate 4 on a soft soil layer 1 between two retaining walls, vertically driving a plurality of reinforcing columns 41 downwards on the steel plate 4 to enable the bottom ends of the reinforcing columns 41 to be inserted into the hard soil layer 2, then laying broken stones with the diameter ranging from 20mm to 30mm on the steel plate 4 to form a second gravel layer 5, then filling a first backfill soil layer 6 on the second gravel layer 5, and laying an asphalt layer 7 on the first backfill soil layer 6.

S4: macadam with the diameter range of 20mm-30mm is laid on the first macadam layer 8 to form a third macadam layer 9, and then a second backfill soil layer 10 is filled in the third macadam layer 9, so that the reinforcement process of removing the roadbed by soft filling is realized, underground water in the soft soil layer 1 in the roadbed is reduced, the compactness of the soft soil layer 1 in the roadbed is improved, and the supporting strength and the stability of the roadbed are improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.