CN115341427B - Highway seepage-proofing drainage structure based on capillary isolation principle and construction method thereof - Google Patents
Highway seepage-proofing drainage structure based on capillary isolation principle and construction method thereof Download PDFInfo
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- CN115341427B CN115341427B CN202211083552.4A CN202211083552A CN115341427B CN 115341427 B CN115341427 B CN 115341427B CN 202211083552 A CN202211083552 A CN 202211083552A CN 115341427 B CN115341427 B CN 115341427B
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- 238000002955 isolation Methods 0.000 title claims abstract description 26
- 238000010276 construction Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000004567 concrete Substances 0.000 claims abstract description 16
- 239000011384 asphalt concrete Substances 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 120
- 238000000926 separation method Methods 0.000 claims description 11
- 230000035699 permeability Effects 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 9
- 239000002344 surface layer Substances 0.000 claims description 8
- 239000004746 geotextile Substances 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 description 8
- 239000002689 soil Substances 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000004858 capillary barrier Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
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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
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
-
- 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
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/221—Kerbs or like edging members, e.g. flush kerbs, shoulder retaining means ; Joint members, connecting or load-transfer means specially for kerbs
-
- 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
- E01C11/00—Details of pavings
- E01C11/24—Methods or arrangements for preventing slipperiness or protecting against influences of the weather
-
- 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
- E01C21/00—Apparatus or processes for surface soil stabilisation for road building or like purposes, e.g. mixing local aggregate with binder
-
- 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
- E01C3/003—Foundations for pavings characterised by material or composition used, e.g. waste or recycled material
-
- 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
-
- 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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
- E01C7/34—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ made of several courses which are not bound to each other ; Separating means therefor, e.g. sliding layers
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a highway seepage-proofing drainage structure based on capillary isolation principle and a construction method thereof, wherein the drainage structure sequentially comprises a bearing structure layer, a cushion layer, a base layer, a capillary isolation belt and a pavement layer from bottom to top; the capillary isolation belt comprises fine aggregate, coarse aggregate and two cloth-film; the pavement layer comprises an asphalt concrete layer and a gravel concrete layer. The invention designs a highway seepage-proofing and drainage combined structure based on a capillary isolation principle. According to the composite structure, the fine aggregate is paved on the coarse aggregate, and the impermeable geomembrane is paved between the fine aggregate and the coarse aggregate, so that the maximum impermeable drainage can be realized, the road base layer is always in an unsaturated water state during service, and the stability of the bearing structure layer is maintained.
Description
Technical Field
The invention relates to the technical field of highway slope water prevention, in particular to a highway seepage-proofing drainage structure based on a capillary isolation principle and a construction method thereof.
Background
The China traffic infrastructure is taken as the first world, the rapid development of industries such as high-speed rail, highways, water conservancy and the like is greatly promoted, but for the southern areas of China mainly including tropical subtropical monsoon climate, the rainfall characteristics of high-temperature heavy rain in summer, large rainfall influence range and strong local rain form a larger test on the drainage system of highways.
The stability of highway mainly relies on the bearing road basic unit, just needs to ensure the unsaturated water state of bearing road basic unit to guarantee the stable bearing of bearing road basic unit. The existence of unsaturated water can provide a certain negative pore water pressure, thereby causing the inside of soil body to generate matrix suction force and playing a positive role in bearing of the road base layer. However, after a large rainfall, for some roads with insufficient drainage or large permeability, as the rainwater permeates into the bearing roadbed layer, the roadbed layer is changed from an unsaturated water state to a saturated state, pore water pressure in the soil body is continuously increased, matrix suction force is reduced, and strength and bearing capacity of the roadbed are reduced. When a larger vehicle load caused by larger vehicle flow is encountered, the roadbed is damaged due to insufficient bearing capacity, and the life and property safety of people is seriously threatened. Therefore, in areas with high rainfall, it is a critical problem how to keep the unsaturated water state of the load-bearing road base layer from being destroyed.
The method for keeping the bearing road base layer in the unsaturated state all the time in the service period mainly starts from two aspects: increase the drainage of the road surface and prevent excessive moisture from penetrating into the road base layer. The traditional drainage and seepage-proofing methods mainly comprise the steps of arranging a drainage pipe, a drainage plate, placing a seepage-proofing isolation layer and the like. However, these conventional methods still have disadvantages such as complicated operation, poor barrier effect, excessive cost, and the like. Therefore, it is particularly important to find a combined structure with flexible and convenient construction and good drainage and seepage prevention effects.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, provides a highway anti-seepage drainage structure based on a capillary isolation principle and a construction method thereof, and designs a highway anti-seepage drainage combined structure based on the capillary isolation principle. According to the composite structure, the fine aggregate is paved on the coarse aggregate, and the impermeable geomembrane is paved between the fine aggregate and the coarse aggregate, so that the maximum impermeable drainage can be realized, the road base layer is always in an unsaturated water state during service, and the stability of the bearing structure layer is maintained.
In order to solve the technical problems, the invention adopts the following technical scheme: a highway seepage-proofing drainage structure based on a capillary isolation principle is characterized in that a bearing structure layer, a cushion layer, a base layer, a capillary isolation belt and a pavement layer are sequentially arranged from bottom to top.
The capillary isolation belt comprises fine aggregate, coarse aggregate and two cloth-film; the pavement layer comprises an asphalt concrete layer and a gravel concrete layer.
Further preferably, the invention further comprises a curb and a shoulder, so that water can be drained at a position far away from the traffic lane, the traffic risk is reduced, and the stability of the traffic lane can be protected.
Further preferably, the asphalt concrete layer is arranged on the top of the gravel concrete layer and covers the gravel concrete layer, so that a road surface layer is formed, and the transverse arch gradient of the road surface layer is 2% -4% so as to realize the drainage of rainwater to two sides.
Further preferably, the capillary separation zone is a first layer of fine aggregate, geotextile, a second layer of fine aggregate, coarse aggregate, a third layer of fine aggregate, two-cloth-one-film and a fourth layer of fine aggregate from top to bottom, respectively.
The thickness of the first layer of fine aggregate is larger than 30cm, and the first layer of fine aggregate is used for transversely draining most of rainwater; the thickness of the second layer of fine aggregate, the third layer of fine aggregate and the fourth layer of fine aggregate is 1-10 cm.
It is further preferred that the coarse aggregate layer is made of construction waste, such as waste concrete, waste masonry.
The grain diameter range d of the coarse aggregate is 4.75-20 mm; the permeability coefficient k w≤10-10 m/s of the coarse aggregate layer is when the volume water content theta w approaches 0.
As a further preferred aspect of the present invention, the fine aggregate has a particle size in the range of 0.05 to 1mm and a permeability coefficient at saturation of more than 10 -5 m/s.
The construction method of the highway seepage-proofing drainage structure based on the capillary isolation principle comprises the following steps:
step 1, selecting two cloth films meeting waterproof requirements according to the specification before highway construction;
step 2, filling each layer of structure is sequentially arranged from bottom to top;
the cushion layer material is selected from high-quality sand and broken stone, and the thickness is 10-30 cm;
the top of the cushion layer is a base layer, 2 layers or 3 layers can be arranged on the base layer, and the thickness is 30-80 cm;
The top of the base layer is provided with a capillary isolation belt, and the capillary isolation belt sequentially comprises 30cm fine aggregate, geotextile cloth, 5cm fine aggregate, 10cm thick coarse aggregate, 5cm fine aggregate, two cloth-one films and 10cm fine aggregate from the top to the bottom; compacting each layer, and paving 10cm thick crushed stone concrete and 7cm thick asphalt concrete on the upper part to finish the construction of the highway;
Step 3, when the rainfall is large, rainwater can flow to two sides of the pavement layer to be discharged; the rainwater partially permeated into the road surface layer can be temporarily absorbed and stored through the fine aggregate and then can be discharged to two sides, and the redundant water permeated from the fine aggregate layer can be adsorbed by the coarse aggregate, so that the high-efficiency seepage prevention and water drainage of the road structural layer are realized.
The invention has the following beneficial effects:
1. The invention designs a highway anti-seepage drainage combined structure based on a capillary isolation principle, which can realize the maximum anti-seepage drainage by paving fine aggregate on coarse aggregate and paving an anti-seepage geomembrane between the fine aggregate and the coarse aggregate, so that a road base layer is always in an unsaturated water state during service, and the stability of a bearing structure layer is maintained.
2. The coarse aggregate selected in the invention can use waste garbage generated in the building dismantling process, realizes waste utilization, is environment-friendly, and is favorable for repeated and efficient utilization of resources and sustainable development of the environment.
3. In the aspect of construction technology, the composite structure adopted by the invention is flexible and simple in construction, and the requirements of drainage and seepage prevention can be met by only arranging the capillary isolation belt between the surface layer and the base layer. And is easier to construct and refurbish.
Drawings
Fig. 1 is a structural elevation view of the highway anti-seepage drainage structure based on the capillary separation principle of the present invention.
FIG. 2 is a schematic diagram of a capillary separation tape of a highway anti-seepage drainage structure based on the principle of capillary separation according to the present invention.
The method comprises the following steps: 10. a load bearing structural layer; 20. a cushion layer; 30. a base layer; 40. a capillary separation tape; 41. fine aggregate; 42. coarse aggregate; 43. two films are distributed; 44. geotextile; 50. a road surface layer; 51. an asphalt concrete layer; 52. a crushed stone concrete layer; 60. a curb; 70. road shoulders.
Detailed Description
In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and "first", "second", etc. do not indicate the importance of the components, and thus are not to be construed as limiting the present invention. The specific dimensions adopted in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present invention.
The principle on which the invention is based is the principle of capillary separation, also known as capillary screening. The permeability coefficient of coarse aggregate is much smaller than that of fine aggregate when the soil is in a low saturation state (relatively dry). The fine aggregate is placed above the coarse aggregate, and the coarse aggregate with low saturation forms a set of natural waterproof curtain to prevent rainwater from penetrating into soil. On the other hand, a drainage system is arranged on the fine aggregate layer, and the stored rainwater is discharged out of the fine aggregate layer in a design time. Capillary barrier system advantage: because the void ratio of the fine aggregate layer is relatively high, the fine aggregate layer can be used as a temporary rainwater storage bin, and the coarse aggregate can block the infiltration of rainwater to the soil body of the side slope due to the low permeability coefficient. On the other hand, after the rainfall is finished, the rainwater stored in the fine aggregate layer can be gradually discharged, so that a new temporary storage space is provided for the subsequent rainfall.
The invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
As shown in fig. 1, a highway seepage-proofing drainage structure based on capillary isolation principle is characterized in that: the load bearing structure layer 10, the cushion layer 20, the base layer 30, the capillary separation tape 40, the road surface layer 50, the curb 60, and the road shoulder 70 are sequentially laid from bottom to top.
The pavement layer 50 includes an asphalt concrete layer 51 and a gravel concrete layer 52. The first layer is an asphalt concrete layer 51 which can keep the road surface smooth; the second layer is a gravel concrete layer 52 for filling the pavement level. The asphalt concrete layer 51 is laid on top of the gravel concrete layer 52 and covers the gravel concrete layer 52, thereby constituting the pavement layer 50. The lateral arch slope of the pavement layer 50 is 2% -4% in order to exert the maximum efficiency of the capillary barrier.
The capillary separation zone 40 is positioned between the pavement layer 50 and the base layer 30 of the highway so that rainwater is drained before entering the base layer 30, and the base layer 30 and the cushion layer 20 are positioned under the capillary separation zone 40 to ensure that moisture does not enter the load-bearing structural layer 10.
As shown in fig. 2, the capillary separation zone 40 is composed of a first layer of fine aggregate 41, geotextile 44, a second layer of fine aggregate 41, coarse aggregate 42, a third layer of fine aggregate 41, two-cloth-one membrane 43 and a fourth layer of fine aggregate 41 from top to bottom, respectively.
The thickness of the first layer of fine aggregate 41 is more than 30cm, the grain diameter of the fine aggregate 41 ranges from 0.05 mm to 1mm, the permeability coefficient at saturation is more than 10 -5 m/s, and the first layer of fine aggregate 41 is used for draining most rainwater transversely.
The thickness of the second layer fine aggregate 41, the third layer fine aggregate 41 and the fourth layer fine aggregate 41 is 1 to 10cm, which function to protect the geotextile 44 and both sides of the two-over-one membrane 43 from being pierced by crushed stones or punctured.
The coarse aggregate 42 layers are made of construction waste, such as waste concrete and waste masonry; the grain diameter range d of the coarse aggregate 42 is 4.75-20 mm; the coarse aggregate 42 has a permeability coefficient k w≤10-10 m/s as the volume moisture content θ w approaches 0.
When rainwater falls to the road ground, most of the water is discharged to the drainage ditches on two sides through the fine aggregate 41 and the geotechnical cloth 44, and redundant water enters the coarse aggregate 42 after penetrating through the geotechnical cloth 44 and is absorbed by the matrix suction force of the coarse aggregate 42, and the two cloth films 43 at the lowest part can ensure that no redundant water penetrates into the lower structure of the road.
As is clear from comparison of the soil-water characteristic curves of the coarse aggregate 42 and the fine aggregate 41, the suction force of the matrix at the time of drying of the coarse aggregate having a particle diameter in the range of 4.75 to 20mm is larger than that of the fine aggregate, and a large amount of moisture can be prevented from being permeated.
Based on the device, the construction method of the highway seepage-proofing and drainage structure based on the capillary isolation principle can realize the seepage-proofing and drainage of the highway to the greatest extent, so that the bearing performance of the bearing roadbed of the highway in the service period is kept stable.
The construction method specifically comprises the following steps:
Step 1, selecting two cloth films 43 meeting waterproof requirements according to the specification before highway construction;
step 2, filling each layer of structure is sequentially arranged from bottom to top;
The underlayer 20 is made of high-quality sand and gravels, and the thickness is 10-30 cm;
the top of the cushion layer 20 is a base layer 30, 2 layers or 3 layers can be arranged on the base layer 30, and the thickness is 30-80 cm;
The top of the base layer 30 is provided with a capillary isolation belt 40, and the capillary isolation belt 40 is sequentially provided with 30cm fine aggregate 41, geotextile cloth 44,5cm fine aggregate 41, 10cm thick coarse aggregate 42,5cm fine aggregate 41, two cloth films 43 and 10cm fine aggregate 41 from top to bottom; compacting each layer, and paving a 10cm thick crushed stone concrete layer 52 and a 7cm thick asphalt concrete layer 51 on the upper part to finish the construction of the highway;
Step 3, when the rainfall is large, rainwater can flow to two sides of the pavement layer 50 to be discharged; the rainwater partially permeated into the pavement layer 50 is temporarily absorbed and stored through the first layer of fine aggregate 41 and then absorbed by the coarse aggregate 42, thereby achieving efficient seepage prevention and drainage of the road structural layer.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the equivalent changes belong to the protection scope of the present invention.
Claims (2)
1. The utility model provides a highway prevention of seepage drainage structure based on capillary isolation principle which characterized in that: sequentially arranging a bearing structure layer (10), a cushion layer (20), a base layer (30), a capillary isolation belt (40) and a pavement layer (50) from bottom to top; the capillary separation belt (40) comprises fine aggregate (41), coarse aggregate (42) and two cloth-one films (43);
The pavement layer (50) comprises an asphalt concrete layer (51) and a gravel concrete layer (52);
The asphalt concrete layer (51) is arranged on the top of the gravel concrete layer (52) and covers the gravel concrete layer (52), so that a road surface layer (50) is formed, and the transverse arch gradient of the road surface layer (50) is 2% -4%;
The capillary isolation belt (40) is respectively provided with a first layer of fine aggregate (41), geotextile (44), a second layer of fine aggregate (41), coarse aggregate (42), a third layer of fine aggregate (41), two cloth-membrane (43) and a fourth layer of fine aggregate (41) from top to bottom;
the thickness of the first layer of fine aggregate (41) is larger than 30cm, and the first layer of fine aggregate (41) is used for transversely draining most of rainwater; the thickness of the second layer of fine aggregate (41), the third layer of fine aggregate (41) and the fourth layer of fine aggregate (41) is 1-10 cm;
the coarse aggregate (42) layer is made of construction waste;
The grain diameter range d of the coarse aggregate (42) is 4.75-20 mm; the permeability coefficient k w≤10-10 m/s of the coarse aggregate (42) when the volume water content theta w approaches 0;
The grain diameter of the fine aggregate (41) ranges from 0.05 mm to 1mm, and the permeability coefficient at saturation is more than 10 -5 m/s.
2. The highway seepage-proofing drainage structure based on capillary isolation principle according to claim 1, wherein: also comprises a curb (60) and a curb (70).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211083552.4A CN115341427B (en) | 2022-09-06 | 2022-09-06 | Highway seepage-proofing drainage structure based on capillary isolation principle and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211083552.4A CN115341427B (en) | 2022-09-06 | 2022-09-06 | Highway seepage-proofing drainage structure based on capillary isolation principle and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115341427A CN115341427A (en) | 2022-11-15 |
| CN115341427B true CN115341427B (en) | 2024-05-28 |
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| CN202211083552.4A Active CN115341427B (en) | 2022-09-06 | 2022-09-06 | Highway seepage-proofing drainage structure based on capillary isolation principle and construction method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101245574A (en) * | 2007-02-14 | 2008-08-20 | 中国神华能源股份有限公司 | Method for building over loading railway road-bed on salting ground |
| CN104863116A (en) * | 2015-06-08 | 2015-08-26 | 铁道第三勘察设计院集团有限公司 | Directional drainage two-cloth one-film anti-seepage drainage structure |
| CN210916845U (en) * | 2019-08-14 | 2020-07-03 | 孙程 | Cold region improved clay roadbed with water drainage structure added at edge of pavement cushion layer |
| CN111827031A (en) * | 2020-07-15 | 2020-10-27 | 中国二十冶集团有限公司 | Construction method of stone-filled embankment |
| CN112942004A (en) * | 2021-01-29 | 2021-06-11 | 东南大学 | Double-layer capillary barrier drainage seepage-proofing structure of embankment |
-
2022
- 2022-09-06 CN CN202211083552.4A patent/CN115341427B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101245574A (en) * | 2007-02-14 | 2008-08-20 | 中国神华能源股份有限公司 | Method for building over loading railway road-bed on salting ground |
| CN104863116A (en) * | 2015-06-08 | 2015-08-26 | 铁道第三勘察设计院集团有限公司 | Directional drainage two-cloth one-film anti-seepage drainage structure |
| CN210916845U (en) * | 2019-08-14 | 2020-07-03 | 孙程 | Cold region improved clay roadbed with water drainage structure added at edge of pavement cushion layer |
| CN111827031A (en) * | 2020-07-15 | 2020-10-27 | 中国二十冶集团有限公司 | Construction method of stone-filled embankment |
| CN112942004A (en) * | 2021-01-29 | 2021-06-11 | 东南大学 | Double-layer capillary barrier drainage seepage-proofing structure of embankment |
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| CN115341427A (en) | 2022-11-15 |
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