CN112281806A - Spring soil roadbed unsaturated horizontal drainage device and construction method thereof - Google Patents
Spring soil roadbed unsaturated horizontal drainage device and construction method thereof Download PDFInfo
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- CN112281806A CN112281806A CN202011265186.5A CN202011265186A CN112281806A CN 112281806 A CN112281806 A CN 112281806A CN 202011265186 A CN202011265186 A CN 202011265186A CN 112281806 A CN112281806 A CN 112281806A
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- 238000010276 construction Methods 0.000 title claims abstract description 34
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- 210000001736 Capillaries Anatomy 0.000 claims abstract description 34
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
- E02D3/103—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains by installing wick drains or sand bags
Abstract
The invention relates to the field of civil engineering foundation treatment construction, in particular to a spring soil roadbed unsaturated horizontal drainage device and a construction method thereof, which are characterized in that: including setting up the drainage structures tied in a bundle in the road bed, the drainage structures tied in a bundle includes that drain pipe tied in a bundle and drainage collect the discharge port, is equipped with a plurality of capillary drainage channels that extend along length direction in the drain pipe tied in a bundle, drain pipe tied in a bundle communicate to the drainage collects the discharge port. The S-shaped cluster drainage pipe is adopted, and the seepage water can be drained under the unsaturated condition through the conduction of the geotextile. The damage of water seepage to the roadbed and the road surface structure can be effectively reduced, the deformation of the embankment can be reduced, the bearing performance of the road surface structure and the roadbed is ensured, the road surface structure is safer, and the construction process is more advanced. The method can efficiently treat the problems that the spring soil and the expansive soil of the clay stratum cannot be compacted and the like, can directly replace the blind ditch, eliminates the clogging problem after long-term use in the blind ditch, and has remarkable economic and social benefits.
Description
Technical Field
The invention relates to the field of civil engineering foundation treatment construction, in particular to a spring soil roadbed unsaturated horizontal drainage device and a construction method thereof.
Background
Spring soil is a cohesive soil body that cannot be compacted because the water content of the soil is higher than that required to achieve a specified degree of compaction. When the foundation is cohesive soil and has high water content and tends to be saturated, the foundation has a vibrating feeling when being stepped on after being rammed, so the foundation is named as spring soil. The pavement structure layer and the roadbed system are usually in an unsaturated state, and due to the formation of a capillary effect, the traditional drainage method cannot effectively discharge capillary water in the unsaturated state, and the blockage problem occurs after long-term use in the blind ditches. Rainwater can permeate into a pavement layer and roadbed soil through the pavement, so that the pavement structure is weakened, uneven deformation caused by expansion and contraction of the roadbed is aggravated, and spring soil is formed.
Disclosure of Invention
An object of the present invention is to solve at least the above problems by providing a spring soil unsaturated horizontal drainage device for draining water infiltrated into a road surface structure and an embankment in time, ensuring the load-bearing performance of the road surface structure and a roadbed, reducing deformation of the embankment, and providing at least the advantages described later.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: spring dirt road bed unsaturated level drainage device, its characterized in that: the drainage structure comprises a cluster drainage pipe and a drainage collection outlet, wherein the cluster drainage structure is arranged in a roadbed and comprises a cluster drainage pipe and a drainage collection outlet, a plurality of capillary drainage channels extending along the length direction are arranged in the cluster drainage pipe, and the cluster drainage pipe is communicated to the drainage collection outlet.
Preferably, the bundled drain pipe comprises a plurality of capillary drain pipes spliced side by side, and the capillary drain pipe is formed at intervals among the capillary drain pipes.
Preferably, the cross section of the capillary drainage pipe is S-shaped.
Preferably, the bundling drainage pipe is wrapped with geotextile, and the geotextile is geotextile.
Preferably, the drainage structure further comprises a lower drainage structure layer, the lower drainage structure layer comprises transverse drainage grooves and longitudinal drainage grooves which are communicated in a criss-cross mode, the cluster drainage structure is arranged in the lower drainage structure layer, the cluster drainage pipes are arranged in the transverse drainage grooves and the longitudinal drainage grooves, the cluster drainage pipes extend along the length direction of the drainage grooves, and the cluster drainage pipes are connected in series and then are collected to the drainage collection outlet.
Preferably, the drainage gradient of the transverse drainage groove is 2% -4%.
Preferably, the drainage collection outlet is provided with a one-way drainage device.
Preferably, the bottom of the transverse drainage groove and the bottom of the longitudinal drainage groove are provided with sand gravel cushion layers, the cluster drainage pipe is laid above the sand gravel cushion layers, and a water permeable material is filled between the cluster drainage pipe and the transverse drainage groove as well as between the cluster drainage pipe and the longitudinal drainage groove.
Preferably, the middle coarse sand cushion layer, the water-proof geomembrane layer and the upper drainage structure layer are sequentially arranged between the lower drainage structure layer and the pavement structure layer from bottom to top, the cluster drainage structure is arranged in the upper drainage structure layer, the geotextile is laid above the cluster drainage structure of the upper drainage structure layer, the cluster drainage pipe in the lower drainage structure layer is of a round pipe shape, and the cluster drainage pipe in the upper drainage structure layer is of a flat strip shape.
The construction method of the spring soil roadbed unsaturated horizontal drainage device is characterized by comprising the following steps of:
step a, construction preparation: preparing equipment materials, performing construction measurement lofting and rechecking, and leveling a field;
step b, excavating an underground water drainage channel: positioning and paying off are carried out according to the trend and the depth of a pipe groove shown in a construction drawing, then earth excavation is carried out, the slope of a bottom slope is consistent with that of a roadbed cross slope, and finally drainage is carried out to a nearest rainwater well, a drainage ditch or a culvert in the groove;
step c, assembling the cluster drainage pipe: assembling the S-shaped capillary drainage pipes into a cluster drainage pipe;
d, mounting a lower bundling water drainage pipe: after the detection of the groove is finished, firstly, a sand gravel cushion layer is backfilled, then, the processed bundled drain pipes are buried in the center of the groove, the part of the bundled drain pipes are processed into a round pipe shape and externally coated with geotechnical cloth, the bundled drain pipes are connected through a straight-through pipe, a tee joint and a four-way pipe, the geotechnical cloth is wrapped at the connecting parts and is adhered tightly by using an adhesive tape, and after all the bundled drain pipes at the lower part are connected in series, the bundled drain pipes are led to the nearest drainage collecting and discharging port and finally led to the nearest rainwater well, drainage ditch or culvert;
step e, backfilling the water permeable material: after the cluster drainage pipe is installed and inspected, backfilling a water permeable material until the water permeable material is backfilled to the elevation of the bottom of the roadbed, then flatly compacting the roadbed surface, and finally spreading a medium coarse sand cushion layer on the roadbed surface for protecting the geomembrane playing a water-resisting role;
step f, laying a waterproof geomembrane: flattening the medium-coarse sand cushion layer, firstly putting the film material into a road bed groove, unfolding the film from bottom to top at one end of the film material which is vertical to the axis of a road, and bonding the film one by one;
step g, installing a cluster drain pipe at the upper part: the upper bundling drain pipe is processed into a flat strip shape, geotechnical cloth is wrapped outside the flat strip type bundling drain pipe, the flat strip type bundling drain pipe is connected by adopting a straight-through joint, a three-way joint and a four-way joint with corresponding specifications, the geotechnical cloth is wrapped at the connecting part and is tightly adhered by using an adhesive tape, the upper bundling drain pipe is completely connected in series and then is led to a nearest drain collecting outlet and finally is led to a nearest rainwater well, a drain ditch or a culvert, the geotechnical cloth is laid after the upper bundling drain pipe is installed, the geotechnical cloth is laid, and the construction requirement is met by smooth lapping length;
step h: construction of a pavement structure layer: and after the geotextile is laid, the construction of the pavement structure layer can be carried out.
From the above description, the spring soil roadbed unsaturated horizontal drainage device and the construction method thereof provided by the invention have the following beneficial effects:
the invention adopts the cluster drainage pipe assembled by S-shaped drainage pipes, and quickly conducts surface water, rainwater, lower-drainage underground water and seepage water through the geotextile conducting layer and the capillary pipelines in the cluster drainage pipe, thereby realizing the horizontal drainage effect of the roadbed under the unsaturated condition, and further achieving the effects of improving the bearing capacity and the structural durability of the roadbed;
secondly, on one hand, horizontal drainage is enhanced through the lower drainage structure layer to control capillary water to rise, on the other hand, horizontal drainage is enhanced through the upper drainage structure layer to reduce moisture accumulation of a pavement structure to the maximum extent, so that underground water is prevented from entering a roadbed bearing structure layer, and meanwhile, water seepage is conducted to the upper part;
the damage of water seepage to the roadbed and the pavement structure can be effectively reduced, the deformation of the embankment can be reduced, the bearing performance of the pavement structure and the roadbed can be ensured, the pavement structure is safer, and the construction process is more advanced;
the problems that the spring soil and the expansive soil of the clay stratum cannot be compacted and the like can be efficiently treated, the blind ditch can be directly replaced, the clogging problem after long-term use in the blind ditch is eliminated, and the method has obvious economic and social benefits;
and fifthly, the geotextile with the enhanced horizontal drainage capability is used in the frost-susceptible area, so that not only can a capillary blocking effect be formed to prevent underground water from entering the frost area, but also accumulated water can be drained to the edge of the pavement.
Drawings
Fig. 1 is a schematic structural view of a cluster drainage structure.
Fig. 2 is a cross-sectional view of a bundled drain pipe in the lower drainage structural layer.
Fig. 3 is a schematic cross-sectional view of a bundled drain pipe in an upper drainage structural layer.
Fig. 4 is a structural diagram of a lower drainage structure layer.
FIG. 5 is a cross-sectional view of a spring dirt subgrade unsaturated horizontal drainage device.
Detailed Description
The invention is further described below by means of specific embodiments.
The present invention will be further described with reference to the following detailed description so that the technical means, the creation features, the achievement purposes and the effects of the present invention can be easily understood.
As shown in fig. 1-3, the spring soil subgrade unsaturated horizontal drainage device of the invention comprises a cluster drainage structure 1 arranged in a subgrade, wherein the cluster drainage structure 1 comprises a cluster drainage pipe 11 and a drainage collection outlet 12, a plurality of capillary drainage channels 112 extending along the length direction are arranged in the cluster drainage pipe 11, and the cluster drainage pipe 11 is communicated with the drainage collection outlet 12. The bundled drain pipes 11 are distributed along the longitudinal direction and the transverse direction, and the longitudinal direction and the transverse direction of the bundled drain pipes 11 are communicated with each other.
The bundled drain pipe 11 includes a plurality of capillary drain pipes 111 spliced side by side with each other, and an open capillary drain passage 112 is formed at an interval between the capillary drain pipes 111.
In this embodiment, the cross section of the capillary drainage pipe 111 is S-shaped, the S-shaped capillary drainage pipes 111 are arranged side by side to form the bundle drainage pipe 11, and not only the capillary drainage channel 112 is provided inside the bundle drainage pipe 11, but also an open gap is provided between the S-shaped capillary drainage pipes 111 on adjacent side walls of the bundle drainage pipe, so that water can enter the capillary drainage channel 112 from the gap, in other embodiments, the cross section of the capillary drainage pipe 111 may be in other shapes, such as C-shaped, E-shaped, W-shaped, and the like.
In this embodiment, the bundled drain pipes 11 in the lower drainage structure layer 2 are circular pipes, the bundled drain pipes 11 in the upper drainage structure layer 2 are flat bars, and in other embodiments, the cross sections of the bundled drain pipes 11 in the lower drainage structure layer 2 and the upper drainage structure layer 2 may be in other shapes.
The exterior of the cluster drainage pipe 11 is covered with geotextile 13, and in the embodiment, the geotextile 13 is geotextile. The geotextile is a water-permeable geosynthetic material formed by needling or weaving synthetic fibers, has high strength, can keep sufficient strength and elongation in a dry and wet state due to the use of plastic fibers, is corrosion-resistant, can resist corrosion for a long time in soil and water with different pH values, has good water permeability because of having gaps among the fibers, has good water permeability, and guides water in the roadbed into the open capillary drain pipe 111 in the bundling drain pipe 11 through the water seepage of the geotextile to be finally discharged.
Fig. 5 is a sectional view of the spring soil roadbed unsaturated horizontal drainage device, the spring soil roadbed unsaturated horizontal drainage device of the invention further comprises a lower drainage structure layer 2, a middle coarse sand cushion layer 3, a water-resisting geomembrane layer 4 and an upper drainage structure layer 5 from bottom to top in sequence, and a pavement structure layer is arranged above the upper drainage structure layer 5. The pavement structure layer sets up according to the construction requirement, for example can be from up including pavement structure cement stable layer 6, pavement structure gravel layer 7 and pavement structure asphalt concrete surface course 8 down in proper order.
As shown in fig. 4, the lower drainage structure layer 2 includes a transverse drainage channel 21 and a longitudinal drainage channel 22 which are criss-cross communicated with each other, the transverse drainage channel 21 is arranged along the transverse direction of the road surface, the longitudinal drainage channel 22 extends along the long direction of the road surface, a cluster drainage structure 1 is arranged in the lower drainage structure layer 2, cluster drainage pipes 11 are laid in the transverse drainage channel 21 and the longitudinal drainage channel 22, the cluster drainage pipes 11 extend along the long direction of the drainage channels, the cluster drainage pipes 11 are connected in series and then collected to a drainage collection outlet 12, the lower drainage structure layer 2 collects the seepage water of the lower part of the roadbed into the cluster drainage pipes 11 through the transverse drainage channel 21 and the longitudinal drainage channel 22, water is collected to the drain collecting outlet 12 through the capillary drain passage 112 in the collecting drain pipe 11, and arranged to be adjacent to a rain (sewage) well or culvert, and a drainage collection and discharge port 12 is arranged at the lower side of the cross slope.
The bottom slope of the transverse drainage channel 21 is consistent with the transverse slope of the roadbed, and the drainage slope is 2-4%. The drainage collection outlet 12 is provided with a one-way drainage device, for example, a one-way drainage mechanism such as a sleeve type flap valve is adopted, so that water can not enter or exit, and the roadbed is prevented from being soaked by backward flowing.
As shown in fig. 5, sand-gravel cushion layers 23 are arranged at the bottoms of the transverse drainage grooves 21 and the longitudinal drainage grooves 22, the bundling drainage pipes 11 are laid above the sand-gravel cushion layers 23, water permeable materials 24 are filled between the bundling drainage pipes 11 and the transverse drainage grooves 21 and between the bundling drainage pipes 22 and the longitudinal drainage grooves 22, and the water permeable materials 24 are water permeable materials of common pavement base drainage layers, such as cement or asphalt treated gravel aggregates.
The upper drainage structure layer 5 is also internally provided with a cluster drainage structure 1, and geotextile is laid above the cluster drainage structure 1 of the upper drainage structure layer 5.
The construction method of the spring soil subgrade unsaturated horizontal drainage device comprises the following steps:
step a, construction preparation: preparing construction technical data and equipment materials, performing construction measurement lofting and rechecking, and leveling a field;
step b, excavating an underground water drainage channel: positioning and paying off are carried out according to the trend and the depth of a pipe groove shown in a construction drawing, the bottom width of the groove is 30cm, the average depth of the groove is 50cm, then earth excavation is carried out, the slope of a bottom slope is consistent with that of a roadbed cross slope, and finally drainage is carried out to a nearest rainwater well, a drainage ditch or a culvert in the groove;
step c, assembling the bundled drainage pipes 11: assembling the S-shaped capillary drainage pipe 111 into a cluster drainage pipe 11;
step d, installing the lower bundling water drain pipe 11: after the detection of the groove is finished, firstly, a sand gravel cushion layer 23 of 5cm is backfilled, then, the processed bundled drain pipes 11 are buried in the center of the groove, the implementation is summarized, the part of the bundled drain pipes 11 are processed into a round pipe type with the diameter of 7.5cm, 8-15S-shaped drain pipes are bundled into a pipe, geotechnical cloth is coated outside, the bundled drain pipes 11 are connected by adopting DMG-phi 75 straight-through type, tee joint, four-way joint and the like, the connecting parts are coated with geotechnical cloth and are tightly adhered by using adhesive tapes, and after the lower bundled drain pipes 11 are all connected in series, the bundled drain pipes are led to the nearest drain collecting outlet 12 and finally led to the nearest rainwater well, drain ditch or culvert;
step e, backfilling the water permeable material: after the cluster drain pipe 11 is installed and inspected, backfilling a water permeable material, wherein the concrete method of backfilling the water permeable material can refer to a blind ditch construction scheme, backfilling the water permeable material to the elevation of the bottom of the roadbed, then flatly compacting the roadbed surface, and finally spreading a medium coarse sand cushion layer 3 on the roadbed surface for protecting the geomembrane playing a role of water resistance;
step f, laying a waterproof geomembrane: flattening the medium coarse sand cushion layer 3, firstly putting the film material into a roadbed groove, unfolding the film from bottom to top at one end of the film material which is vertical to the axis of the road, and bonding the film one by one; the geomembrane uses plastic film as the anti-seepage base material, and is a geotechnical anti-seepage material formed by compounding with non-woven fabrics, and the water-resisting geomembrane has two functions: on one hand, the underground water is prevented from rising to erode and destroy a road surface structure layer, on the other hand, the road surface rainwater is prevented from infiltrating and soaking a road foundation soil layer to cause the water invasion and the damage of the road foundation, the geomembrane belongs to the flexible geotextile 13, and the laying quality has direct influence on the stress environment of the geomembrane. Therefore, when the supporting layer (the medium coarse sand cushion layer 3) is laid, the sand cushion layer is required to be flattened, so that the supporting effect of the supporting layer is enhanced.
Step g, installing the upper bundling water drain pipe 11: the upper bundling drain pipe 11 is processed into a 10cm 2cm flat strip type, 5-8S-shaped drain pipes are bundled into a pipe, geotechnical cloth is wrapped outside the pipe, the flat strip type bundling drain pipe 11 is connected by adopting a straight-through pipe, a three-way pipe and a four-way pipe with corresponding specifications, the geotechnical cloth is wrapped at the connecting part and is tightly adhered by using an adhesive tape, the upper bundling drain pipe 11 is completely connected in series and then is led to the nearest drainage collecting outlet 12 and finally led to the nearest rainwater well, drainage ditch or culvert, and after the upper bundling drain pipe 11 is installed, geotechnical cloth laying is carried out, and the geotechnical cloth laying is smooth, and the lap joint length meets the construction requirement;
step h: construction of a pavement structure layer: and after the geotextile is laid, the construction of the pavement structure layer can be carried out.
According to the technical scheme of the specific embodiment, the spring soil roadbed unsaturated horizontal drainage device and the construction method thereof provided by the invention have the following beneficial effects that:
firstly, the cluster drainage pipe 11 formed by assembling S-shaped drainage pipes is adopted, surface water, rainwater, lower-drainage underground water and seepage water are quickly conducted through the geotextile conduction layer and capillary pipelines in the cluster drainage pipe 11, and the horizontal drainage effect of the roadbed under the unsaturated condition is realized, so that the effects of improving the bearing capacity and the structural durability of the roadbed are achieved;
secondly, on one hand, the lower drainage structure layer 2 enhances horizontal drainage to control capillary water to rise, and on the other hand, the upper drainage structure layer 5 enhances horizontal drainage to reduce the water accumulation of the pavement structure to the maximum extent, so that underground water is prevented from entering the roadbed bearing structure layer, and meanwhile, the upper seepage water is conducted;
the damage of water seepage to the roadbed and the pavement structure can be effectively reduced, the deformation of the embankment can be reduced, the bearing performance of the pavement structure and the roadbed can be ensured, the pavement structure is safer, and the construction process is more advanced;
the problems that the spring soil and the expansive soil of the clay stratum cannot be compacted and the like can be efficiently treated, the blind ditch can be directly replaced, the clogging problem after long-term use in the blind ditch is eliminated, and the method has obvious economic and social benefits;
and fifthly, the geotextile 13 with the enhanced horizontal drainage capability is used in the frost-susceptible area, so that not only can a capillary blocking effect be formed to prevent underground water from entering the frost area, but also accumulated water can be drained to the edge of the pavement.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly, e.g., as meaning fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed; the type of the electrical appliance provided by the invention is only used for reference. For those skilled in the art, different types of electrical appliances with the same function can be replaced according to actual use conditions, and for those skilled in the art, the specific meaning of the above terms in the present invention can be understood in specific situations.
The above description is only a few specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by the design concept should fall within the scope of the present invention.
Claims (10)
1. Spring dirt road bed unsaturated level drainage device, its characterized in that: the drainage structure comprises a cluster drainage pipe and a drainage collection outlet, wherein the cluster drainage structure is arranged in a roadbed and comprises a cluster drainage pipe and a drainage collection outlet, a plurality of capillary drainage channels extending along the length direction are arranged in the cluster drainage pipe, and the cluster drainage pipe is communicated to the drainage collection outlet.
2. The spring dirt subgrade unsaturated horizontal drainage device of claim 1, characterized in that: the bundling drainage pipe comprises a plurality of capillary drainage pipes which are spliced side by side, and capillary drainage channels are formed at intervals among the capillary drainage pipes.
3. The spring dirt subgrade unsaturated horizontal drainage device of claim 2, characterized in that: the section of the capillary drain pipe is S-shaped.
4. The spring dirt subgrade unsaturated horizontal drainage device of claim 1, characterized in that: the cluster drain pipe is wrapped with geotextile, and the geotextile is geotextile.
5. The spring dirt subgrade unsaturated horizontal drainage device of claim 1, characterized in that: the drainage structure comprises a lower drainage structure layer and is characterized by further comprising a lower drainage structure layer, wherein the lower drainage structure layer comprises transverse drainage grooves and longitudinal drainage grooves which are communicated in a criss-cross mode, the lower drainage structure layer is internally provided with the cluster drainage structures, the transverse drainage grooves and the longitudinal drainage grooves are internally provided with the cluster drainage pipes, the cluster drainage pipes extend along the long direction of the drainage grooves, and the cluster drainage pipes are connected in series and then are collected to be communicated to a drainage collection outlet.
6. The spring dirt subgrade unsaturated horizontal drainage device of claim 1, characterized in that: the drainage gradient of the transverse drainage groove is 2% -4%.
7. The spring dirt subgrade unsaturated horizontal drainage device of claim 1, characterized in that: the drainage collection outlet is provided with a one-way drainage device.
8. The spring dirt subgrade unsaturated horizontal drainage device of claim 1, characterized in that: the sand gravel cushion layer is arranged at the bottoms of the transverse drainage grooves and the longitudinal drainage grooves, the cluster drainage pipe is laid above the sand gravel cushion layer, and a water permeable material is filled between the cluster drainage pipe and the transverse drainage grooves and between the cluster drainage pipe and the longitudinal drainage grooves.
9. The spring dirt subgrade unsaturated horizontal drainage device of claim 1, characterized in that: the improved water-proof and water-proof road surface drainage structure comprises a lower drainage structure layer and a road surface structure layer, and is characterized in that a medium coarse sand cushion layer, a water-proof geomembrane layer and an upper drainage structure layer are sequentially arranged between the lower drainage structure layer and the road surface structure layer from bottom to top, the cluster drainage structure is arranged in the upper drainage structure layer, geotextile is laid above the cluster drainage structure of the upper drainage structure layer, a cluster drainage pipe in the lower drainage structure layer is of a circular pipe shape, and a cluster drainage pipe in the upper drainage structure layer.
10. A method of constructing a springy dirt subgrade unsaturated horizontal drainage device according to any one of claims 1 to 9, characterised in that it comprises the following steps:
step a, construction preparation: preparing equipment materials, performing construction measurement lofting and rechecking, and leveling a field;
step b, excavating an underground water drainage channel: positioning and paying off are carried out according to the trend and the depth of a pipe groove shown in a construction drawing, then earth excavation is carried out, the slope of a bottom slope is consistent with that of a roadbed cross slope, and finally drainage is carried out to a nearest rainwater well, a drainage ditch or a culvert in the groove;
step c, assembling the cluster drainage pipe: assembling the S-shaped capillary drainage pipes into a cluster drainage pipe;
d, mounting a lower bundling water drainage pipe: after the detection of the groove is finished, firstly, a sand gravel cushion layer is backfilled, then, the processed bundled drain pipes are buried in the center of the groove, the part of the bundled drain pipes are processed into a round pipe shape and externally coated with geotechnical cloth, the bundled drain pipes are connected through a straight-through pipe, a tee joint and a four-way pipe, the geotechnical cloth is wrapped at the connecting parts and is adhered tightly by using an adhesive tape, and after all the bundled drain pipes at the lower part are connected in series, the bundled drain pipes are led to the nearest drainage collecting and discharging port and finally led to the nearest rainwater well, drainage ditch or culvert;
step e, backfilling the water permeable material: after the cluster drainage pipe is installed and inspected, backfilling a water permeable material until the water permeable material is backfilled to the elevation of the bottom of the roadbed, then flatly compacting the roadbed surface, and finally spreading a medium coarse sand cushion layer on the roadbed surface for protecting the geomembrane playing a water-resisting role;
step f, laying a waterproof geomembrane: flattening the medium-coarse sand cushion layer, firstly putting the film material into a road bed groove, unfolding the film from bottom to top at one end of the film material which is vertical to the axis of a road, and bonding the film one by one;
step g, installing a cluster drain pipe at the upper part: the upper bundling drain pipe is processed into a flat strip shape, geotechnical cloth is wrapped outside the flat strip type bundling drain pipe, the flat strip type bundling drain pipe is connected by adopting a straight-through joint, a three-way joint and a four-way joint with corresponding specifications, the geotechnical cloth is wrapped at the connecting part and is tightly adhered by using an adhesive tape, the upper bundling drain pipe is completely connected in series and then is led to a nearest drain collecting outlet and finally is led to a nearest rainwater well, a drain ditch or a culvert, the geotechnical cloth is laid after the upper bundling drain pipe is installed, the geotechnical cloth is laid, and the construction requirement is met by smooth lapping length;
step h: construction of a pavement structure layer: and after the geotextile is laid, the construction of the pavement structure layer can be carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011265186.5A CN112281806A (en) | 2020-11-13 | 2020-11-13 | Spring soil roadbed unsaturated horizontal drainage device and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011265186.5A CN112281806A (en) | 2020-11-13 | 2020-11-13 | Spring soil roadbed unsaturated horizontal drainage device and construction method thereof |
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| CN112281806A true CN112281806A (en) | 2021-01-29 |
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| CN202011265186.5A Withdrawn CN112281806A (en) | 2020-11-13 | 2020-11-13 | Spring soil roadbed unsaturated horizontal drainage device and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113529757A (en) * | 2021-08-24 | 2021-10-22 | 山东省交通科学研究院 | Step type water permeability building rubbish slope supporting structure and construction method |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113529757A (en) * | 2021-08-24 | 2021-10-22 | 山东省交通科学研究院 | Step type water permeability building rubbish slope supporting structure and construction method |
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Application publication date: 20210129 |