CN220335613U - Drainage anti-freezing structure for soft soil composite foundation in cold region - Google Patents
Drainage anti-freezing structure for soft soil composite foundation in cold region Download PDFInfo
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- CN220335613U CN220335613U CN202321840080.2U CN202321840080U CN220335613U CN 220335613 U CN220335613 U CN 220335613U CN 202321840080 U CN202321840080 U CN 202321840080U CN 220335613 U CN220335613 U CN 220335613U
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- 239000002689 soil Substances 0.000 title claims abstract description 90
- 238000007710 freezing Methods 0.000 title claims abstract description 23
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 239000004576 sand Substances 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000009413 insulation Methods 0.000 claims abstract description 10
- 239000004575 stone Substances 0.000 claims description 32
- 239000004746 geotextile Substances 0.000 claims description 21
- 238000001914 filtration Methods 0.000 claims description 20
- 238000007596 consolidation process Methods 0.000 abstract description 15
- 230000006378 damage Effects 0.000 abstract description 13
- 238000006073 displacement reaction Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 7
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 3
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- 238000010276 construction Methods 0.000 description 6
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- 238000000034 method Methods 0.000 description 5
- 238000009412 basement excavation Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 239000002352 surface water Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000002528 anti-freeze Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009746 freeze damage Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 208000001034 Frostbite Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model discloses a drainage anti-freezing structure of a soft soil composite foundation in a cold region, which belongs to the field of road engineering, and utilizes sand gravel to replace and fill to promote the drainage of the soft soil foundation and improve the bearing capacity, prevent the displacement of piles and promote the consolidation of the drainage of the soft soil, and the improvement of the consolidation of the drainage of the roadbed can effectively reduce the deformation and cracking of the roadbed caused by frost heaving, reduce the damage of the frost thawing effect on the road surface and effectively prevent and treat the frost damage of the road; the surface of the slope toe is paved with a slope toe heat insulation structure, and a drainage antifreezing ecological side ditch is arranged, so that the slope toe is insulated, and meanwhile, accumulated water outside the roadbed can be drained; the utility model has simple structure, can effectively reduce the humidity of the roadbed, quicken the drainage consolidation of the foundation, improve the whole bearing capacity of the roadbed, reduce the road diseases in cold areas, and adopts the antifreezing ecological side ditch to replace the drain pipe in the cold areas and the use of the concrete side ditch, thereby being an economic and effective measure which is beneficial to the original ecological environment and having popularization prospect.
Description
Technical Field
The utility model belongs to the field of road engineering, and particularly relates to a drainage anti-freezing structure of a soft soil composite foundation in a cold region.
Background
Most cold areas are widely distributed with soft soil, and the cold area soft soil mainly consists of mucky soil and a small amount of humus soil, so that the natural water content is high, the water permeability is poor, the time required for consolidation is long, the shear strength is low, the compression modulus is low, and the foundation settlement is large. Under seasonal freeze thawing environment, the soft soil foundation has very low bearing capacity, and in cold period, the roadbed filled soil and the lower soft soil layer may freeze with the change of temperature, ground temperature and humidity, and the roadbed filled soil and the lower soft soil layer may melt once the temperature is raised with the change of seasons, so that excessive settlement deformation is produced and serious loss is caused to engineering. Therefore, the construction of structures such as highways, railways and the like on the high and cold soft soil foundation can meet the serious problems of roadbed deformation and settlement, foundation instability, pavement cracking, frost heaving, slurry turning and the like. The existing research shows that: the formation of the frozen crust layer of the foundation can cause the increase of the soil pressure at the toe of the slope, so that the vertical settlement is increased, and the use of the roadbed can be seriously affected by the frost damage of the toe of the slope, which extends to the interior of the roadbed.
The existing design method has the following defects:
1. the water content in the soft soil foundation in the cold region is large, the bearing capacity is low, the drainage consolidation is difficult, the soft soil foundation is not easy to bear by only reinforcing the foundation by the drainage piles, the piles are positioned in the soft soil and can displace along with the settlement deformation of the soft soil, and if the displacement of the pile body is serious, the roadbed is possibly unstable and damaged.
2. The pvc pipe is laid in the roadbed along the highway for drainage, the mode has high cost and is not beneficial to economy, and the cold area pipeline gushes water and frost heaves are easy to crack.
3. The concrete side ditch is adopted outside the slope toe to carry out surface transverse drainage, and the side ditch is easy to crack in a cold area due to poor freezing resistance of the concrete, so that surface water seepage is caused, and the damage to a foundation is extremely large.
4. The slope toe in the cold region is isolated and insulated by using the cohesive soil, frost heaving can occur above a cohesive soil freezing line, and the paving of the cohesive soil at the slope toe parts at two sides of the road is not attractive, and if the road is scoured in rainy seasons, the heat insulation effect is reduced and the ecology is unfavorable.
Therefore, the soft soil is settled due to the freeze thawing action of the cold region, so that the foundation is displaced, the bearing capacity of the foundation is reduced, the settlement is easy to occur, and serious damage is caused to the foundation and the road surface.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the drainage anti-freezing structure of the soft soil composite foundation in the cold region, which can not be settled, improves the bearing capacity, reduces the damage of the freeze thawing effect to the road surface, and effectively prevents and controls the road freeze injury.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a drainage anti-freezing structure of a soft soil composite foundation in a cold region comprises a geocell;
the geocell is arranged at the bottom of the roadbed in the cold area; the geocell chamber is filled with a broken stone cushion layer;
a gravel layer is paved at the bottom of the broken stone cushion layer; the sand gravel layer is thickened in sequence at the road shoulder and the slope toe to form a step-shaped structure;
a toe heat insulation structure is paved on the surface of the toe;
the sand gravel layer is connected with an antifreezing ecological side ditch for removing accumulated water outside the roadbed; the antifreezing ecological side ditch is arranged on the outer side of the slope toe.
Further, the sand gravel layer comprises a first sand gravel layer, a second sand gravel layer and a third sand gravel layer, and the thickness of the first sand gravel layer, the second sand gravel layer and the third sand gravel layer is sequentially increased and communicated.
Further, the first sand gravel layer is filled with sand gravel with the thickness of 40 cm; the second sand gravel layer is filled with sand gravel with the thickness of 60 cm; the third sand gravel layer was filled with sand gravel having a thickness of 80 cm.
Further, the toe insulation structure comprises a meadow soil layer A and a broken stone layer which are paved from top to bottom on the surface of the toe; the gravel layer is paved on the surface of the gravel layer.
Further, the surface of the crushed stone layer is wrapped with reverse filtering geotextile.
Further, cold area meadow A is transplanted on the meadow soil layer A.
Further, the antifreezing ecological side ditch comprises a meadow soil layer B, a coarse grain graded broken stone permeable layer and a fine grain graded broken stone permeable layer which are paved in sequence from top to bottom.
Further, cold area meadow B is transplanted on the meadow soil layer B.
Further, a reverse filtering geotextile A is arranged between the meadow soil layer B and the coarse grain graded broken stone permeable layer; a reverse filtering geotextile B is arranged between the coarse-grain graded broken stone permeable layer and the fine-grain graded broken stone permeable layer; the surface of the antifreezing ecological side ditch is wrapped by waterproof geotextile.
Further, one side of the antifreezing ecological side ditch, which is far away from the roadbed, is provided with a flexible water retaining structure with a raised surface.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides a drainage anti-freezing structure of a soft soil composite foundation in a cold region, which is characterized in that a gravel cushion layer is filled in a geocell chamber, a gravel layer is paved at the bottom of the gravel cushion layer, and sequentially thickened at road shoulders and slope feet to form a stepped structure, the soft soil foundation drainage and bearing capacity improvement can be promoted by utilizing the replacement and filling of the gravel, the displacement of piles and the consolidation of the soft soil drainage are prevented, the improvement of the roadbed drainage consolidation can effectively reduce roadbed deformation and cracking caused by frost heaving, the damage effect of frost thawing on a road surface is reduced, the road frost damage is effectively prevented and the surface transverse drainage can be carried out through the stepped structure; the surface of the slope toe is paved with a slope toe heat insulation structure, and an antifreezing ecological side ditch is arranged, so that the slope toe is insulated, and meanwhile, accumulated water outside the roadbed can be discharged; the utility model has simple structure, can effectively reduce the humidity of the roadbed, quicken the drainage consolidation of the foundation, improve the whole bearing capacity of the roadbed, reduce the road diseases in cold areas, and adopts the antifreezing ecological side ditch to replace the drain pipe in the cold areas and the use of the concrete side ditch, thereby being an economic and effective measure which is beneficial to the original ecological environment and having popularization prospect.
Preferably, the present utility model employs a sand gravel layer including a first sand gravel layer, a second sand gravel layer and a third sand gravel layer, and having thicknesses of 40cm, 60cm and 80cm, respectively, having the following advantages: (1) The water drainage consolidation function is good in water permeability of the sand gravel, and the stepped sand-changing gravel can accelerate transverse drainage by utilizing water pressure change, so that the water drainage consolidation function of soft soil near the pile top is facilitated; (2) The displacement constraint function is used for constraining the pile top to displace along with the deformation and settlement of soft soil, in particular to horizontal displacement; (3) And the bearing function is that the sand gravel bearing capacity is strong, and the sand gravel bearing capacity is used for replacing and filling the soft soil foundation, so that the settlement damage of the toe due to the overlarge vertical load after the structural layer on the upper part of the toe is applied can be prevented.
Preferably, the heat insulation structure of the toe of the slope comprises a meadow soil layer A and a gravel layer paved on the surface of the toe from top to bottom, and the meadow soil layer A is transplanted with the meadow A in a cold region, so that the toe of the slope can be insulated through the meadow A in the cold region and the meadow soil layer A, and the gravel is wrapped by the reverse-filtering geotextile at the lower part of the meadow soil layer A to drain, thereby improving the drainage effect.
Preferably, the antifreezing ecological side ditch adopts a meadow transplanted in a cold area to lay the top of the side ditch, the lower part of a meadow soil layer B is paved with reverse filtration geotextile interception soil particles to promote surface drainage, the lower part of the meadow soil layer B is provided with a coarse particle grading macadam permeable layer and a fine particle grading permeable layer to promote drainage, the periphery of the antifreezing ecological side ditch is wrapped by waterproof geotextile to prevent surface water from flowing back into a roadbed, and the outer side of the side ditch uses a meadow soil layer to manufacture protrusions to serve as flexible structure water retaining; like this, adopt the ecological side ditch that prevents frostbite to replace concrete side ditch, utilize cold district meadow B to keep warm and the side ditch drainage manger plate to the toe, full play ecological self-regulating ability blocks ground and pavement structure moisture and gets into the road bed body, has reduced the road bed freeze injury to improve cold district road bed's frost resistance, improved road bed intensity, solved cold district concrete side ditch and had frozen poor resistance easily fracture problem.
Drawings
Fig. 1 is a schematic structural diagram of a drainage and anti-freezing structure for a soft soil composite foundation in a cold region according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a part of a toe insulation structure and an antifreezing ecological side ditch according to an embodiment of the present utility model;
fig. 3 is a partial enlarged view of an antifreezing ecological side ditch provided by the embodiment of the utility model.
Reference numerals:
geocell-1; a gravel cushion layer-2; a first gravel layer-3; a second gravel layer-4; cold area meadow A-5; a meadow soil layer A-6; a crushed stone layer-7; an antifreezing ecological side ditch-8; a third gravel layer-9; a flexible water retaining structure-10; cold area meadow B-8a; meadow soil layer B-8B; reversely filtering geotextile A-8c; coarse grain graded broken stone permeable layer-8 d; reversely filtering geotextile B-8e; fine-grain graded macadam permeable layer-8 f; waterproof geotextile-8 g.
Detailed Description
The utility model provides a drainage anti-freezing structure of a soft soil composite foundation in a cold region, which comprises a geocell 1; the geocell 1 is arranged at the bottom of a roadbed in a cold region; the geotechnical cells 1 are filled with gravel cushions 2; a gravel layer is paved at the bottom of the gravel cushion layer 2; sequentially thickening the gravel layer at the road shoulder and the slope toe to form a stepped structure; a toe heat-insulating structure is laid on the surface of the toe; the sand gravel layer is connected with an antifreezing ecological side ditch 8 for removing accumulated water outside the roadbed; the antifreezing ecological side ditch 8 is arranged on the outer side of the toe.
The gravel layer comprises a first gravel layer 3, a second gravel layer 4 and a third gravel layer 9, and the thicknesses of the first gravel layer, the second gravel layer and the third gravel layer are sequentially increased and are communicated.
The first gravel layer 3 is filled with sand gravel having a thickness of 40 cm; the second gravel layer 4 is filled with sand gravel having a thickness of 60 cm; the third gravel layer 9 was filled with sand gravel having a thickness of 80 cm.
The toe insulation structure comprises a meadow soil layer A6 and a broken stone layer 7 which are paved from top to bottom on the surface of the toe; the gravel layer 7 is paved on the surface of the sand gravel layer; the surface of the crushed stone layer 7 is wrapped with reverse filtering geotextile; cold area meadow A5 is transplanted on the meadow soil layer A6.
The antifreezing ecological side ditch 8 comprises a meadow soil layer B8B, a coarse grain graded broken stone permeable layer 8d and a fine grain graded broken stone permeable layer 8f which are paved in sequence from top to bottom; cold area meadow B8a is transplanted on the meadow soil layer B8B.
Specifically, a reverse-filtering geotextile A8c is arranged between a meadow soil layer B8B and a coarse-grain graded broken stone permeable layer 8d; a reverse filtering geotextile B8e is arranged between the coarse-grain graded broken stone permeable layer 8d and the fine-grain graded broken stone permeable layer 8f; the surface of the antifreezing ecological side ditch is wrapped by waterproof geotextile 8g.
In consideration of effectively blocking the road area water, a flexible water blocking structure 10 with raised surface is arranged on one side of the antifreezing ecological side ditch 8 away from the roadbed.
The present utility model will be further described with reference to the following embodiments of the utility model and the accompanying drawings, wherein, of course, the described embodiments are merely some, but not all embodiments of the utility model.
Examples
As shown in fig. 1, this embodiment provides a drainage and freeze protection structure for a soft soil composite foundation in a cold region, which comprises a geocell 1, a gravel cushion layer 2, a first gravel layer 3, a second gravel layer 4, a cold region meadow A5, a meadow soil layer A6, a gravel layer 7, an anti-freezing ecological side ditch 8, a third gravel layer 9 and a flexible water retaining structure 10, wherein the specific structure of the drainage and freeze protection structure is as follows:
the sand gravel layers below the pile tops are distributed in a step shape, so that not only is the difference of vertical pressure at different positions considered, but also water in the roadbed is guided and discharged out of the roadbed by utilizing water pressure change.
As shown in fig. 2, the slope angle is laid by utilizing a meadow A5 and a meadow soil layer A6 in a cold region, the lower part is wrapped by a reverse filtering layer (reverse filtering geotechnical cloth) to promote drainage, an antifreezing ecological side ditch 8 is arranged outside the slope foot, a meadow soil layer is arranged outside the side ditch to naturally bulge, a flexible structure water retaining effect is achieved, and a flexible water retaining structure 10 is formed.
As shown in fig. 3, the structure of the antifreeze ecological side ditch 8 is mainly divided into three layers, namely an upper layer of meadow B8a and a meadow soil layer B8B, which are used for keeping warm the side ditch according to local conditions by utilizing the ecological environment of the cold region, a middle layer is a coarse-grain graded broken stone permeable layer 8d, and a lower layer is a fine-grain graded broken stone permeable layer 8f, and a reverse-filtering geotechnical cloth A8c and a reverse-filtering geotechnical cloth B8e separation structure layer are respectively adopted to prevent soil grain loss, and the whole antifreeze ecological side ditch is surrounded by waterproof geotechnical cloth 8g to prevent surface water from flowing to the roadbed.
Based on the same design concept, the embodiment also provides a construction method of the drainage anti-freezing structure of the soft soil composite foundation in the cold region, which specifically comprises the following steps based on the structure:
step one: and (3) preparation of construction: and verifying the replacement depth and range, preparing construction machinery equipment, and preparing materials such as waterproof geotextile, reverse-filtering geotextile, sand gravel, graded broken stone and the like.
Step two: unqualified soil excavation: and after different excavation depth ranges are determined, the excavator is matched with manual excavation, the foundation is cleaned and leveled after the excavator is excavated to the corresponding depth, and backfilling can be performed after the foundation is inspected to be qualified.
Step three: backfilling sand gravel: the sand gravel is paved in layers, the thickness of each layer is not more than 30cm, the layers are paved and then are rolled back and forth by a road roller, and the edge joint is compacted by a small-sized compactor, wherein the compaction degree is not less than 95%.
Step four: leveling and acceptance: when in construction, each layer should be leveled, the compactness is checked, the stone content of the gravel is notified to the on-site supervision and verification, and the lower layer paving is continued after the gravel is qualified. After the final lamination (ramming) is completed, the surface should be leveled with the wires and the design specified elevation should be met.
Step five: and (3) maintenance of roadbed: after the roadbed is filled, the roadbed is closed, the roadbed cannot be driven within 3 days at least, and one sprinkling maintenance is required to be carried out at intervals.
Step six: digging and trimming ecological side ditches: after the road base surface construction is completed, paying off the side ditch and excavating the side ditch, adopting an excavator to collect the side ditch, wherein the compactness of the side ditch is not less than 80%, and after the excavation, trimming and tamping the side ditch.
Step seven: laying waterproof geotextile: and after the side ditch is excavated and trimmed, paving the whole side ditch by using waterproof geotextile.
The embodiment provides a cold region weak soil composite foundation drainage freeze-proof structure, its structural feature and have the advantage as follows:
and (3) designing a drainage structure: the method is characterized in that 40cm sand gravel is filled under the pile top, and the thickness of the sand gravel is increased by 20cm at the road shoulder and the slope toe respectively by considering the influence of vertical pressure at the road shoulder and the slope toe, so that the section of the foundation sand gravel structure is in a step shape.
The beneficial effects are as follows: the water drainage consolidation function is good, the stepped sand-filled gravel can accelerate transverse drainage by utilizing the water pressure change, and the water drainage consolidation function of soft soil near the pile top is facilitated; b, under the displacement constraint effect, the pile top is constrained to displace along with the deformation and settlement of soft soil, and especially the displacement is horizontally displaced; and c, the bearing function, because of strong sand gravel bearing capacity, the soft soil foundation is replaced by the sand gravel bearing capacity, and the settlement damage of the toe due to overlarge vertical load after the application of the structural layer on the upper part of the toe can be prevented.
And (3) the structural design of freeze protection: the method is characterized in that a cold region meadow is transplanted at the toe of a slope for heat preservation, broken stone is wrapped by reverse filtering geotechnical cloth at the lower part of a meadow soil layer for drainage, and an antifreezing ecological side ditch is arranged outside the toe of the slope for surface transverse drainage.
The specific implementation method of the ecological side ditch comprises the following steps: the method is characterized in that the upper part of a side ditch is paved in a meadow in a transplanted cold area, reverse-filtering geotechnical cloth intercepting soil particles are paved on the lower part of a meadow soil layer to promote surface drainage, a coarse-grain graded broken stone permeable layer and a fine-grain graded permeable layer are arranged on the lower part of the soil layer to promote drainage, waterproof geotechnical cloth is wrapped around the ecological side ditch to prevent surface water from flowing back into a roadbed, and a meadow soil layer manufacturing bulge is utilized on the outer side of the side ditch to make flexible-structure water retaining.
The beneficial effects are that: the concrete side ditch is replaced by the antifreezing ecological side ditch, the cold area meadow is utilized for heat preservation of the slope toe and water drainage and retaining of the side ditch, ecological self-regulating capability is fully exerted, moisture in the foundation and pavement structure is blocked from entering the roadbed body, and the roadbed freezing injury is reduced, so that the antifreezing capability of the cold area roadbed is improved, the roadbed strength is improved, and the problem that the cold area concrete side ditch is poor in freezing resistance and easy to crack is solved.
According to the embodiment, the soft soil foundation is replaced and filled with sand gravel to promote drainage of the soft soil foundation, the bearing capacity is improved, the displacement of piles is prevented, the soft soil drainage consolidation is promoted, the roadbed drainage consolidation improvement can effectively reduce roadbed deformation cracking caused by frost heaving, the damage of the frost thawing effect on the road surface is reduced, and the road frost damage is effectively prevented.
The embodiment has simple structure, can effectively reduce the humidity of the roadbed, quicken the drainage consolidation of the foundation, improve the whole bearing capacity of the roadbed, reduce the road diseases of the cold region, adopt the antifreezing ecological side ditch to replace the drain pipe of the cold region and the use of the concrete side ditch, be an economic and effective measure which is beneficial to the original ecological environment and have popularization prospect.
Although the embodiments of the present utility model have been described above with reference to the accompanying drawings and examples, the present utility model is not limited to the above-described specific embodiments and application fields, which are illustrative, instructive, and not restrictive. Those skilled in the art, having the benefit of this disclosure, may make many forms without departing from the scope of the utility model as claimed.
Claims (10)
1. The drainage anti-freezing structure of the soft soil composite foundation in the cold region is characterized by comprising a geocell (1);
the geocell (1) is arranged at the bottom of a roadbed in a cold region; the geotechnical grid chamber (1) is filled with a broken stone cushion layer (2);
a gravel layer is paved at the bottom of the broken stone cushion layer (2); the sand gravel layer is thickened in sequence at the road shoulder and the slope toe to form a step-shaped structure;
a toe heat insulation structure is paved on the surface of the toe;
the sand gravel layer is connected with an antifreezing ecological side ditch (8) for removing accumulated water outside the roadbed; the antifreezing ecological side ditch (8) is arranged on the outer side of the slope toe.
2. The cold region soft soil composite foundation drainage freeze-proof structure according to claim 1, wherein the sand gravel layer comprises a first sand gravel layer (3), a second sand gravel layer (4) and a third sand gravel layer (9), and the thickness of the first sand gravel layer, the second sand gravel layer and the third sand gravel layer is sequentially increased and communicated.
3. The cold region soft soil composite foundation drainage freeze protection structure according to claim 2, wherein the first gravel layer (3) is filled with sand gravel with a thickness of 40 cm; the second gravel layer (4) is filled with sand gravel with the thickness of 60 cm; the third gravel layer (9) was filled with sand gravel having a thickness of 80 cm.
4. The cold region soft soil composite foundation drainage antifreezing structure according to claim 1, wherein the toe heat insulation structure comprises a meadow soil layer A (6) and a gravel layer (7) paved from top to bottom on the surface of the toe; the gravel layer (7) is paved on the surface of the gravel layer.
5. The drainage and anti-freezing structure of the soft soil composite foundation in the cold region according to claim 4, wherein the surface of the crushed stone layer (7) is wrapped with anti-filtering geotextile.
6. The cold region soft soil composite foundation drainage anti-freezing structure according to claim 4, wherein cold region meadow A (5) is transplanted on the meadow soil layer A (6).
7. The cold region soft soil composite foundation drainage anti-freezing structure according to claim 1, wherein the anti-freezing ecological side ditch (8) comprises a meadow soil layer B (8B), a coarse grain graded broken stone permeable layer (8 d) and a fine grain graded broken stone permeable layer (8 f) which are paved in sequence from top to bottom.
8. The cold region soft soil composite foundation drainage freeze-proof structure according to claim 7, wherein cold region meadow B (8 a) is transplanted on the meadow soil layer B (8B).
9. The cold region soft soil composite foundation drainage anti-freezing structure according to claim 7, wherein a reverse filtering geotextile A (8 c) is arranged between the meadow soil layer B (8B) and the coarse grain graded broken stone permeable layer (8 d); a reverse filtering geotextile B (8 e) is arranged between the coarse-grain graded broken stone permeable layer (8 d) and the fine-grain graded broken stone permeable layer (8 f); the surface of the antifreezing ecological side ditch is wrapped by waterproof geotextile (8 g).
10. The drainage and anti-freezing structure of the soft soil composite foundation in the cold region according to claim 1, wherein a flexible water retaining structure (10) with a raised surface is arranged on one side of the anti-freezing ecological side ditch (8) away from the roadbed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321840080.2U CN220335613U (en) | 2023-07-12 | 2023-07-12 | Drainage anti-freezing structure for soft soil composite foundation in cold region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321840080.2U CN220335613U (en) | 2023-07-12 | 2023-07-12 | Drainage anti-freezing structure for soft soil composite foundation in cold region |
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| CN220335613U true CN220335613U (en) | 2024-01-12 |
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| CN202321840080.2U Active CN220335613U (en) | 2023-07-12 | 2023-07-12 | Drainage anti-freezing structure for soft soil composite foundation in cold region |
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- 2023-07-12 CN CN202321840080.2U patent/CN220335613U/en active Active
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