CN112281564B - Soft soil roadbed structure and reinforcing construction process - Google Patents
Soft soil roadbed structure and reinforcing construction process Download PDFInfo
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- CN112281564B CN112281564B CN202011157394.3A CN202011157394A CN112281564B CN 112281564 B CN112281564 B CN 112281564B CN 202011157394 A CN202011157394 A CN 202011157394A CN 112281564 B CN112281564 B CN 112281564B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
Abstract
The utility model provides a structure of weak soil roadbed for construction on soft soil layer is built, includes roadbed layer and stake, the vertical fixed mounting of stake is in the ground, and the stake upper end is arranged in roadbed layer, and the stake lower extreme extends to in the ground of soft soil layer below, and the stake is provided with a plurality ofly, is provided with the pressure-bearing girder steel between two adjacent stakes, pressure-bearing girder steel both ends respectively with two adjacent stake fixed connection. The bearing girder steel makes the roadbed between the vertical piles have a supporting structure, when the roadbed top has heavy objects such as pedestrians or vehicles to pass through, the heavy objects can have pressure to the roadbed, the bearing girder steel can conduct a part of pressure to the vertical piles to the pressure that makes the roadbed bear reduces, can reduce the possibility that the roadbed between the vertical piles sinks this moment, has reached the purpose that promotes the steadiness of soft soil roadbed.
Description
Technical Field
The application relates to the field of roadbed construction, in particular to a soft soil roadbed structure and a reinforcing construction process.
Background
At present, soft soil roadbed is a common roadbed in a special area, is mostly distributed in rivers, seacoasts, inland lakes, ponds, basins and rainy mountain depressions, needs special design and treatment, and can be reinforced in the construction of soft soil section in road engineering along with the continuous development of road construction.
The prior soft soil roadbed reinforcing construction process can refer to the invention patent with the publication number of CN105625301A, the immersed tube is immersed below the soft roadbed ground, and the construction is carried out by adopting a vibration immersed tube mode, so as to play a role in enhancing the soft roadbed ground strength.
In view of the above-mentioned related art, the subgrade between the immersed tubes has no support of the immersed tubes, and the soft soil below the subgrade has poor stability, so the subgrade between the immersed tubes is likely to sink more, and the soft soil subgrade has poor stability.
Disclosure of Invention
In order to promote the steadiness of soft soil roadbed, this application provides a structure and reinforcement construction technology of soft soil roadbed.
The application provides a soft soil roadbed's reinforcement construction technology adopts following technical scheme:
the utility model provides a structure of weak soil roadbed for construction on soft soil layer is built, includes roadbed layer and stake, the vertical fixed mounting of stake is in the ground, and the stake upper end is arranged in roadbed layer, and the stake lower extreme extends to in the ground of soft soil layer below, and the stake is provided with a plurality ofly, is provided with the pressure-bearing girder steel between two adjacent stakes, pressure-bearing girder steel both ends respectively with two adjacent stake fixed connection.
Through adopting above-mentioned technical scheme, the pressure-bearing girder steel has made the roadbed between the stake have had bearing structure, and when the roadbed top had heavy objects such as pedestrian or vehicle to pass through, the heavy object can have pressure to the roadbed, and the pressure-bearing girder steel can conduct some pressure for the stake to the pressure that makes the roadbed bear reduces, can reduce the possibility that the roadbed between the stake sinks this moment, has reached the purpose that promotes the steadiness of soft soil roadbed.
Preferably, the end of the pressure-bearing steel beam comprises a clamping block and a rubber pad, a clamping groove is formed in the vertical pile, the clamping block is vertically and fixedly connected to the end of the pressure-bearing steel beam, one side, away from the pressure-bearing steel beam, of the clamping block is inclined towards the direction close to the pressure-bearing steel beam from top to bottom and away from the pressure-bearing steel beam, the clamping block and the rubber pad are located in the vertical pile through the clamping groove, the clamping block is matched with the butt of the vertical pile, one side, away from the pressure-bearing steel beam, of the inner wall of the vertical pile formed by the clamping groove is inclined towards the direction close to the pressure-bearing steel beam from top to bottom and away from the pressure-bearing steel beam, the rubber pad is fixedly connected to the lower portion of the clamping block, and the rubber pad is fixedly connected with the vertical pile.
Through adopting above-mentioned technical scheme, when the roadbed receives heavy object pressure, the roadbed can produce decurrent pressure to the pressure-bearing girder steel, this moment the pressure-bearing girder steel can be relative the pilework downstream, the rubber pad is compressed in vertical direction, the slope that pressure-bearing girder steel one side was kept away from to the pilework inner wall that the draw-in groove formed sets up the distance that makes pressure-bearing girder steel both ends and reduces, micro-deformation can take place for the pressure-bearing girder steel, the pressure-bearing girder steel can rebound at the in-process of reconversion, can produce an ascending thrust to the roadbed this moment, thereby reduce the sunken possibility of roadbed, the purpose of increase weak soil roadbed steadiness has been reached.
Preferably, the pressure-bearing steel beam is arched.
Through adopting above-mentioned technical scheme, when the pressure-bearing girder steel received the pressure that the roadbed layer transmitted, the pressure-bearing girder steel probably received pressure, and pressure-bearing girder steel both ends are the minimum of pressure-bearing girder steel, and the pressure-bearing girder steel can reduce the pressure-bearing girder steel permanent deformation possibility of even fracture for the pile with the more transmission of power that receives this moment, has reached the purpose that promotes the pressure-bearing girder steel steadiness.
Preferably, the roadbed layer comprises a sand cushion layer, a gravel layer, a volcanic rock layer, a concrete layer and an asphalt surface layer, the roadbed groove is formed in the soft soil layer, the sand cushion layer is laid at the bottom of the roadbed groove, and the gravel layer, the volcanic rock layer, the concrete layer and the asphalt surface layer are sequentially laid above the sand cushion layer from bottom to top.
Through adopting above-mentioned technical scheme, sand cushion layer, rubble layer, volcanic rock layer, concrete layer and pitch top layer all make the shear strength of the relative weak soil of shear strength of roadbed layer bigger, consequently can increase the bearing capacity of soft soil roadbed, have reached the purpose that improves soft soil roadbed steadiness.
Preferably, the vertical pile comprises a fixing pile, a connecting pile and a limiting block, the fixing pile is located below the connecting pile, the upper end of the fixing pile is located in the sand cushion layer, the lower end of the fixing pile extends into the ground below the soft soil layer, the connecting pile and the pressure-bearing steel beam are located in the gravel layer, the end portion of the pressure-bearing steel beam is connected with the connecting pile, and the lower end of the connecting pile is fixedly connected with the upper end of the fixing pile through the limiting block.
Through adopting above-mentioned technical scheme, when the installation grudging post, the operating personnel can learn the degree of depth in the ground of grudging post lower extreme insertion soft soil layer below through observing the relative sand bed course of stopper to can reduce the highly different possibility of different grudging post lower extreme, reach the purpose that improves the load stability of soft soil roadbed.
Preferably, the horizontal sectional area of the limiting block is gradually increased from top to bottom.
Through adopting above-mentioned technical scheme, when soft soil roadbed load, the stopper can receive decurrent power, because the area of stopper below is great, consequently can reduce the stopper possibility of relative roadbed downwards movement to can reduce the possibility of stake relative ground downwards movement, and the horizontal cross section of stopper top is less, has reached the purpose of carrying save material.
Preferably, pressure-sensitive adhesives are arranged between the connecting piles and the gravel layer and between the pressure-bearing steel beam and the gravel layer.
Through adopting above-mentioned technical scheme, pressure-sensitive adhesive makes between connecting pile and the metalling, between pressure-bearing girder steel and the metalling be connected more firmly, and the relative metalling downstream's of connecting pile and pressure-bearing girder steel possibility that moves down this moment reduces to reduced the relative ground downstream's of stake possibility, reached the purpose that promotes soft soil roadbed structural stability.
Preferably, drainage channels are formed in two sides of the road base layer.
Through adopting above-mentioned technical scheme, when there is the rainfall in soft soil roadbed near region, partly rainwater can flow in water drainage tank, and the rainfall amount that flows in the soft soil through the roadbed layer this moment can reduce to the water content that makes roadbed layer and soft soil layer can reduce, has reached the purpose that improves soft soil roadbed stability.
Preferably, a water-stop sheet is fixedly connected to one side, close to the roadbed layer, of the drainage channel.
Through adopting above-mentioned technical scheme, bin up the rainwater back in water drainage tank, the water-stop sheet can reduce the rainwater in the water drainage tank and pass through the roadbed layer to the volume of infiltration in the soft soil layer to make soft soil layer structural stability rise, reached the purpose that promotes soft soil roadbed stability.
A soft soil roadbed reinforcement construction process comprises the following steps:
s1, pre-arranging a clamping groove on the connecting pile, and installing a rubber pad;
s2, defining a construction range, and forming a roadbed groove on the soft soil layer;
s3, paving a sand cushion layer at the bottom of the soft soil layer;
s4, driving the vertical piles into the sand cushion;
s5, mounting a pressure-bearing steel beam relative to the connecting pile;
s6, coating a pressure-sensitive adhesive outside the connecting pile and the pressure-bearing steel beam;
s7, paving a gravel layer, a volcanic rock layer, a concrete layer and an asphalt surface layer above the sand cushion layer from bottom to top in sequence.
Through adopting above-mentioned technical scheme, at the in-process of building soft soil roadbed, at first set up the draw-in groove in advance on the connecting pile, then set up the roadbed groove on soft soil layer, and lay the sand cushion layer bottom soft soil layer, relative sand cushion layer squeezes into the back of founding the stake again, can pass through the draw-in groove butt with the pressure-bearing reinforcing bar in founding the stake, then lay the metalling, the volcano rock stratum, concrete layer and pitch top layer in proper order behind connecting pile and the outer coating pressure-sensitive adhesive of pressure-bearing girder steel, this process makes things convenient for the construction operation, reached the purpose that promotes the efficiency of construction.
In summary, the present application includes at least one of the following beneficial technical effects:
1. by arranging the pressure-bearing steel beams, the possibility of sinking of the roadbed layer between the vertical piles can be reduced, and the purpose of improving the stability of the soft soil roadbed is achieved;
2. by arranging the fixture blocks and the rubber pads, the possibility of sinking of the roadbed layer can be reduced, and the purpose of increasing the stability of the soft soil roadbed is achieved;
3. through seting up the draw-in groove in advance on connecting the stake, directly pass through the draw-in groove butt with the pressure-bearing reinforcing bar in the stake during construction, reached the purpose that promotes the efficiency of construction.
Drawings
FIG. 1 is a cross-sectional view of the soft soil subgrade structure of the present application;
FIG. 2 is a perspective view highlighting a bearing steel beam;
fig. 3 is an enlarged view of a portion a of fig. 1.
Description of reference numerals: 1. a soft soil layer; 2. a roadbed layer; 21. a sand cushion layer; 22. a crushed stone layer; 23. a volcanic rock formation; 24. a concrete layer; 25. an asphalt surface layer; 3. a support device; 31. erecting a pile; 311. fixing the pile; 312. connecting piles; 3121. a card slot; 313. a limiting block; 32. a pressure-bearing steel beam; 321. a clamping block; 322. a rubber pad; 4. a water discharge tank; 5. a drain pipe; 6. a water-stop sheet.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses structure of soft soil roadbed for be under construction on soft soil layer 1 and build. Referring to fig. 1, the soft soil roadbed structure includes a roadbed layer 2 and supporting devices 3, the roadbed layer 2 is laid on a soft soil layer 1, the supporting devices 3 are installed in the roadbed layer 2, and the lower portions of the supporting devices 3 extend into the ground below the soft soil layer 1. Strutting arrangement 3 can consolidate roadbed 2, reduces the possibility that roadbed 2 removed relatively, has reached the purpose that promotes soft soil roadbed steadiness.
Referring to fig. 1, the roadbed layer 2 comprises a sand cushion layer 21, a gravel layer 22, a volcanic layer 23, a concrete layer 24 and an asphalt surface layer 25, a roadbed groove is formed in the soft soil layer 1, the sand cushion layer 21 is laid at the bottom of the roadbed groove, and the gravel layer 22, the volcanic layer 23, the concrete layer 24 and the asphalt surface layer 25 are sequentially laid above the sand cushion layer 21 from bottom to top. The sand cushion layer 21, the gravel layer 22, the volcano rock layer 23, the concrete layer 24 and the asphalt surface layer 25 all enable the shear strength of the roadbed layer 2 to be larger than that of soft soil, so that the bearing capacity of the soft soil roadbed can be increased, and the purpose of improving the stability of the soft soil roadbed is achieved.
Referring to fig. 1, the supporting device 3 includes a vertical pile 31, the vertical pile 31 is vertically and fixedly installed in the ground, the upper end of the vertical pile 31 is located in the roadbed layer 2, the lower end of the vertical pile 31 extends into the ground below the soft soil layer 1, the vertical pile 31 is provided with a plurality of vertical piles, a pressure-bearing steel beam 32 is arranged between two adjacent vertical piles 31, and two ends of the pressure-bearing steel beam 32 are respectively and fixedly connected with two adjacent vertical piles 31. When there are heavy objects such as pedestrian or vehicle to pass through in 2 tops of roadbed, the heavy object can have pressure to roadbed 2, and pressure-bearing girder steel 32 can conduct some pressure for spud 31 to the pressure that makes roadbed 2 bear reduces, can reduce the possibility that roadbed 2 between the spud 31 sinks this moment, has reached the purpose that promotes the steadiness of soft soil roadbed.
Referring to fig. 2 and 3, it may be that the end of pressure-bearing steel beam 32 further includes a clamping block 321 and a rubber pad 322, a clamping groove 3121 has been provided on stud 31, the vertical fixed connection of clamping block 321 is at the end of pressure-bearing steel beam 32, one side of clamping block 321 far away from pressure-bearing steel beam 32 is from top to bottom, incline towards the direction close to pressure-bearing steel beam 32 by far away from pressure-bearing steel beam 32, clamping block 321 and rubber pad 322 are all located in stud 31 through clamping groove 3121, clamping block 321 cooperates with stud 31 butt, one side of inner wall of stud 31 formed by clamping groove 3121 far away from pressure-bearing steel beam 32 is from top to bottom, incline towards the direction close to pressure-bearing steel beam 32 by far away from pressure-bearing steel beam 32, rubber pad 322 is fixedly connected below clamping block 321, and rubber pad 322 and stud 31 are fixedly connected. When the soft soil roadbed receives heavy object pressure, the soft soil roadbed may produce decurrent pressure to pressure-bearing girder steel 32, this moment pressure-bearing girder steel 32 may be relative found stake 31 downstream, rubber pad 322 is compressed in vertical direction, the slope that pressure-bearing girder steel 32 one side was kept away from to the found stake 31 inner wall that draw-in groove 3121 formed sets up the distance that makes pressure-bearing girder steel 32 both ends and reduces, micro-deformation can take place for pressure-bearing girder steel 32, pressure-bearing girder steel 32 is likely rebound at the in-process of reconversion, can produce an ascending thrust to the soft soil roadbed this moment, thereby reduce the possibility that the soft soil roadbed sinks, the purpose of increase soft soil roadbed steadiness has been reached.
If pressure-bearing steel beam 32 level sets up, when pressure-bearing steel beam 32 received decurrent pressure, pressure size that pressure-bearing steel beam 32 middle part and pressure-bearing steel beam 32 both ends received equals, pressure-bearing steel beam 32 both ends have the stump 31 to support, but the middle part below does not have the support, pressure-bearing steel beam 32 middle part atress this moment is great, permanent deformation can take place in the middle part of pressure-bearing steel beam 32 and set up the fracture, reduce pressure-bearing steel beam 32 steadiness, for the steadiness that promotes pressure-bearing steel beam 32, refer to fig. 1, can set up pressure-bearing steel beam 32 and be the arch. When pressure-bearing steel beam 32 receives the pressure that road bed layer 2 transmitted, pressure-bearing steel beam 32 probably receives pressure, and pressure-bearing steel beam 32 both ends are the minimum of pressure-bearing steel beam 32, and pressure-bearing steel beam 32 can transmit the power that receives more to vertical pile 31 this moment, and the stress reduces in pressure-bearing steel beam 32 middle part, can reduce the possibility that pressure-bearing steel beam 32 middle part permanent deformation even fracture, has reached the purpose that promotes pressure-bearing steel beam 32 steadiness.
In the process of driving the pile 31 into the ground, the operator cannot directly observe the depth of driving the pile 31 into the ground, and in this case, the depth of driving different piles 31 into the ground may be different, and thus the load stability of the soft soil roadbed may be poor. In order to increase the load stability of the soft soil roadbed, referring to fig. 1, the vertical pile 31 may be provided and include a fixed pile 311, a connection pile 312 and a limit block 313, the fixed pile 311 is located below the connection pile 312, the upper end of the fixed pile 311 is located in the sand cushion layer 21, the lower end of the fixed pile 311 extends into the ground below the soft soil layer 1, the connection pile 312 and the pressure-bearing steel beam 32 are both located in the gravel layer 22, the end of the pressure-bearing steel beam 32 is connected with the connection pile 312, and the lower end of the connection pile 312 is fixedly connected with the upper end of the fixed pile 311 through the limit block 313. When the vertical pile 31 is installed, an operator can know the depth of the lower end of the vertical pile 31 inserted into the ground below the soft soil layer 1 by observing the height of the limiting block 313 relative to the sand cushion 21, so that the possibility of different heights of the lower ends of different vertical piles 31 can be reduced, and the purpose of improving the load stability of the soft soil roadbed is achieved.
When the soft soil roadbed is loaded, stopper 313 receives a downward force, and if the area of the bottom of stopper 313 is small, stopper 313 is likely to move downward with respect to roadbed layer 2, and the possibility that pile 31 moves downward with respect to the ground increases. To reduce the likelihood of downward movement of the pile 31 relative to the ground, referring to fig. 1, a stop 313 may be provided having a gradually increasing horizontal cross-sectional area from top to bottom. When the soft soil roadbed carries load, the limit block 313 can be stressed downwards, and the area below the limit block 313 is large, so that the possibility that the limit block 313 moves downwards relative to the roadbed layer 2 can be reduced, the possibility that the vertical pile 31 moves downwards relative to the ground can be reduced, the horizontal cross section above the limit block 313 is small, and the purpose of saving materials is achieved.
The gravel layer 22 is laid on the sand cushion layer 21, the connecting piles 312 and the pressure-bearing steel beams 32 are positioned in the gravel layer 22, and at the moment, the connecting piles 312 and the pressure-bearing steel beams 32 are connected with the gravel layer 22 with low stability, so that the vertical piles 31 may move downwards relative to the ground, and the stability of the soft soil roadbed structure is poor. In order to improve the structural stability of the soft soil roadbed, pressure-sensitive adhesives can be arranged between the connecting piles 312 and the gravel layer 22 and between the pressure-bearing steel beams 32 and the gravel layer 22. The pressure-sensitive adhesive enables the connection between the connecting pile 312 and the gravel layer 22 and between the pressure-bearing steel beam 32 and the gravel layer 22 to be firmer, and the possibility that the connecting pile 312 and the pressure-bearing steel beam 32 move downwards relative to the gravel layer 22 is reduced, so that the possibility that the vertical pile 31 moves downwards relative to the ground is reduced, and the purpose of improving the stability of the soft soil roadbed structure is achieved.
The poor main reason of soft soil layer 1 structural stability is because the water content is higher in the soft soil of soft soil layer 1, when there is rainfall in the region near soft soil roadbed, most rainwater can flow into soft soil layer 1 through roadbed layer 2 to make 1 structural stability in soft soil layer descend, and then make soft soil roadbed stability poor. In order to improve the stability of the soft soil roadbed, referring to fig. 1, drainage channels 4 can be formed in two sides of the roadbed layer 2, drainage plates are installed above the drainage channels 4, a drainage pipe 5 is installed in the volcanic rock layer 23, and the drainage end of the drainage pipe 5 is communicated with the drainage channels 4. When there is rainfall in the region near the soft soil roadbed, it can directly flow into water drainage tank 4 to hoard some rainwater on pitch top layer 25, and infiltration roadbed 2's rainwater still partly can flow into water drainage tank 4 through drain pipe 5, and the rainfall amount that flows into the soft soil through roadbed 2 at this moment can reduce to make roadbed 2 and soft soil layer 1's water content can reduce, reached the purpose that improves soft soil roadbed stability.
More rainwater may be stocked in the water drainage tank 4, and the rainwater of stocking may increase the water content of soft soil layer 1 through among the soft soil layer 1 of roadbed 2 infiltration to make 1 structural stability in soft soil layer descend, and then make soft soil roadbed stability relatively poor, for the stability of promoting the soft soil roadbed, refer to fig. 1, can set up and be close to 2 one side fixedly connected with water-stop sheet 6 of roadbed in the water drainage tank 4. After storing up the rainwater in water drainage tank 4, water-stop sheet 6 can reduce the amount of rainwater in water drainage tank 4 through roadbed layer 2 to infiltration in the soft soil layer 1 to make 1 structural stability in soft soil layer rise, reached the purpose that promotes soft soil roadbed stability.
A soft soil roadbed reinforcement construction process comprises the following steps:
s1, pre-arranging a clamping groove 3121 on the connecting pile 312, and installing a rubber pad 322;
s2, defining a construction range, and forming a roadbed groove on the soft soil layer 1;
s3, paving a sand cushion 21 at the bottom of the soft soil layer 1;
s4, driving the vertical pile 31 into the sand cushion 21;
s5, mounting the pressure-bearing steel beam 32 opposite to the connecting pile 312;
s6, coating a pressure-sensitive adhesive outside the connecting pile 312 and the pressure-bearing steel beam 32;
s7, paving a gravel layer 22, a volcanic rock layer 23, a concrete layer 24 and an asphalt surface layer 25 above the sand cushion 21 from bottom to top in sequence.
In the process of building the soft soil roadbed, firstly, the connecting pile 312 is provided with the clamping groove 3121 in advance, then the roadbed groove is formed in the soft soil layer 1, the sand cushion 21 is paved at the bottom of the soft soil layer 1, and then the vertical pile 31 is driven into the sand cushion 21, pressure-bearing steel bars can be abutted in the vertical pile 31 through the clamping groove 3121 and fixed through the rubber pad 322, then the gravel layer 22, the volcanic rock layer 23, the concrete layer 24 and the asphalt surface layer 25 are sequentially paved after the connecting pile 312 and the pressure-bearing steel beam 32 are coated with pressure-sensitive adhesives, the process is convenient for construction operation, and the purpose of improving the construction efficiency is achieved.
The implementation principle of the structure and the reinforcement construction process of the soft soil roadbed in the embodiment of the application is as follows: offer draw-in groove 3121 in advance on connecting pile 312, then offer the roadbed groove on soft soil layer 1, and lay sand cushion layer 21 in soft soil layer 1 bottom, after driving into vertical pile 31 relative sand cushion layer 21 again, can pass through draw-in groove 3121 butt with the pressure-bearing reinforcing bar and fix in vertical pile 31, when heavy objects such as pedestrian or vehicle pass through above roadbed 2, the heavy object can be to roadbed 2 pressure, pressure-bearing girder steel 32 can conduct some pressure for vertical pile 31, thereby make the pressure that roadbed 2 bore reduce, roadbed 2 subside's possibility between the vertical pile 31 can be reduced this moment, the mesh that has reached promotion soft soil roadbed's steadiness.
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.
Claims (9)
1. The utility model provides a structure of soft soil roadbed for construction on soft soil layer (1) is built, includes roadbed layer (2) and stake (31), the vertical fixed mounting of stake (31) is in the ground, and stake (31) upper end is located roadbed layer (2), and in stake (31) lower extreme extended to the ground of soft soil layer (1) below, stake (31) were provided with a plurality ofly, its characterized in that: a pressure-bearing steel beam (32) is arranged between two adjacent vertical piles (31), and two ends of the pressure-bearing steel beam (32) are respectively and fixedly connected with the two adjacent vertical piles (31);
the end part of the pressure-bearing steel beam (32) comprises a clamping block (321) and a rubber pad (322), a clamping groove (3121) is formed in the vertical pile (31), the clamping block (321) is vertically and fixedly connected to the end part of the pressure-bearing steel beam (32), one side, far away from the pressure-bearing steel beam (32), of the clamping block (321) inclines towards the direction close to the pressure-bearing steel beam (32) from top to bottom, the clamping block (321) and the rubber pad (322) are both located in the vertical pile (31) through the clamping groove (3121), the clamping block (321) is in butt fit with the vertical pile (31), one side, far away from the pressure-bearing steel beam (32), of the inner wall of the vertical pile (31) formed by the clamping groove (3121) is from top to bottom, the side, far away from the pressure-bearing steel beam (32) inclines towards the direction close to the pressure-bearing steel beam (32), the rubber pad (322) is fixedly connected to the lower part of the clamping block (321), and the rubber pad (322) is fixedly connected with the vertical pile (31).
2. A soft soil subgrade structure according to claim 1, characterised in that: the pressure-bearing steel beam (32) is arched.
3. A soft soil subgrade structure according to claim 1, characterised in that: the roadbed layer (2) comprises a sand cushion layer (21), a gravel layer (22), a volcanic stratum (23), a concrete layer (24) and an asphalt surface layer (25), a roadbed groove is formed in the soft soil layer (1), the sand cushion layer (21) is laid at the bottom of the roadbed groove, and the gravel layer (22), the volcanic stratum (23), the concrete layer (24) and the asphalt surface layer (25) are sequentially laid above the sand cushion layer (21) from bottom to top.
4. A soft soil subgrade structure according to claim 3, characterised in that: the vertical pile (31) comprises a fixed pile (311), a connecting pile (312) and a limiting block (313), the fixed pile (311) is located below the connecting pile (312), the upper end of the fixed pile (311) is located in a sand cushion layer (21), the lower end of the fixed pile (311) extends into the ground below a soft soil layer (1), the connecting pile (312) and a pressure-bearing steel beam (32) are located in a gravel layer (22), the end part of the pressure-bearing steel beam (32) is connected with the connecting pile (312), and the lower end of the connecting pile (312) is fixedly connected with the upper end of the fixed pile (311) through the limiting block (313).
5. A soft soil subgrade structure according to claim 4, characterised in that: the horizontal sectional area of the limiting block (313) is gradually increased from top to bottom.
6. A soft soil subgrade structure according to claim 4, characterised in that: pressure-sensitive adhesives are arranged between the connecting piles (312) and the gravel layer (22) and between the pressure-bearing steel beam (32) and the gravel layer (22).
7. A soft soil subgrade structure according to claim 1, characterised in that: and drainage grooves (4) are formed in two sides of the roadbed layer (2).
8. A soft soil subgrade structure according to claim 7, characterised in that: and a water-stop sheet (6) is fixedly connected to one side, close to the roadbed layer (2), in the drainage groove (4).
9. A soft soil roadbed reinforcement construction process according to any one of claims 4, 5 and 6, characterized by comprising the following steps:
s1, pre-forming a clamping groove (3121) on the connecting pile (312);
s2, defining a construction range, and forming a roadbed groove on the soft soil layer (1);
s3, paving a sand cushion (21) at the bottom of the soft soil layer (1);
s4, driving the vertical pile (31) into the sand cushion (21);
s5, mounting the pressure-bearing steel beam (32) relative to the connecting pile (312);
s6, coating a pressure-sensitive adhesive outside the connecting pile (312) and the pressure-bearing steel beam (32);
s7, paving a gravel layer (22), a volcanic rock layer (23), a concrete layer (24) and an asphalt surface layer (25) above the sand cushion layer (21) from bottom to top in sequence.
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| CN202011157394.3A CN112281564B (en) | 2020-10-26 | 2020-10-26 | Soft soil roadbed structure and reinforcing construction process |
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| CN113293664B (en) * | 2021-05-21 | 2022-10-14 | 湖南中耀交通工程有限公司 | Large-area weak roadbed reinforcing structure |
| CN113668310B (en) * | 2021-08-20 | 2023-09-22 | 安徽鸿宇路桥工程有限公司 | Waterproof structure of municipal highway engineering roadbed |
| CN114673040A (en) * | 2022-03-18 | 2022-06-28 | 中铁二院成都勘察设计研究院有限责任公司 | Roadbed supporting structure |
| CN115305759A (en) * | 2022-08-08 | 2022-11-08 | 中国十七冶集团有限公司 | Road foundation protection system for deep soft foundation and construction method thereof |
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| CN101476325B (en) * | 2008-11-28 | 2010-08-11 | 华南理工大学 | Rigid gridding and pile combined foundation and its use in soft soil foundation reinforcement |
| CN106400636B (en) * | 2016-10-20 | 2018-08-21 | 宁波市交通规划设计研究院有限公司 | A kind of control method of the soft soil roadbed differential settlement of Multi-layer road |
| CN207812204U (en) * | 2017-12-02 | 2018-09-04 | 江苏惠淳建设有限公司 | Deep ＆ thick silt matter Reinforcement of Soft Soil Subgrade structure |
| CN210458827U (en) * | 2019-07-30 | 2020-05-05 | 湖南高速公路配套设施有限公司 | Roadbed structure for soft soil area |
| CN211057527U (en) * | 2019-09-21 | 2020-07-21 | 西安永夷建设工程有限责任公司 | Roadbed structure of soft foundation pavement |
| CN111395063B (en) * | 2020-03-25 | 2021-04-27 | 中铁二院工程集团有限责任公司 | Light soil roadbed structure, roadbed system and design method |
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