CN111749073A - Water permeable reconstruction technology based on existing road base layer - Google Patents

Water permeable reconstruction technology based on existing road base layer Download PDF

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Publication number
CN111749073A
CN111749073A CN202010630245.8A CN202010630245A CN111749073A CN 111749073 A CN111749073 A CN 111749073A CN 202010630245 A CN202010630245 A CN 202010630245A CN 111749073 A CN111749073 A CN 111749073A
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layer
existing
water
permeable
storage tank
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CN202010630245.8A
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Chinese (zh)
Inventor
郭春辉
侯磊
袁敏航
范洁
郭钊博
王宗葳
袁琦
邓徐
饶杰
宋慧卿
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China Construction Water Affairs Environmental Protection Co Ltd
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China Construction Water Affairs Environmental Protection Co Ltd
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Priority to CN202010630245.8A priority Critical patent/CN111749073A/en
Publication of CN111749073A publication Critical patent/CN111749073A/en
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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
    • E01C11/00—Details of pavings
    • E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E01C11/224—Surface drainage of streets
    • E01C11/227—Gutters; Channels ; Roof drainage discharge ducts set in sidewalks
    • 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
    • E01C11/224—Surface drainage of streets
    • E01C11/225—Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
    • E03F1/002—Methods, systems, or installations for draining-off sewage or storm water with disposal into the ground, e.g. via dry wells
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F3/00—Sewer pipe-line systems
    • E03F3/04—Pipes or fittings specially adapted to sewers
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0401—Gullies for use in roads or pavements
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/06—Gully gratings
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/101—Dedicated additional structures, interposed or parallel to the sewer system
    • 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
    • E01C2201/00—Paving elements
    • E01C2201/20—Drainage details

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)

Abstract

The invention relates to the technical field of municipal engineering, in particular to a water permeable reconstruction technology based on an existing road base course, which comprises the following steps: removing the surface layer and the leveling layer of the impervious pavement to expose the existing roadbed layer; constructing a drain pipe from the existing roadbed layer to the existing cushion layer on the existing roadbed layer; constructing a water storage tank in the existing roadbed layer, and communicating the water storage tank with the drain pipe; and paving a water-permeable leveling layer and a water-permeable surface layer on the surface of the transformed existing road base layer in sequence. Firstly, a drain pipe and a water storage tank are constructed on the existing roadbed layer, so that the existing roadbed layer has the rainwater infiltration function, the existing roadbed layer and the existing cushion layer are removed from being detached and rebuilt, and meanwhile, the water storage tank can increase the flood discharge effect of the upper structure. The water permeable reconstruction technology solves the problems that when a water permeable structure is newly built, the water permeable structure is subject to large-scale disassembly and large-scale construction, a large amount of construction waste is generated, and a large amount of construction materials are required to be input again.

Description

Water permeable reconstruction technology based on existing road base layer
Technical Field
The invention relates to the technical field of municipal engineering, in particular to a water permeable reconstruction technology based on an existing road base layer.
Background
In recent years, global rainfall is increased, rainfall amount is redistributed, extreme weather is more and more, glaciers and frozen soil are ablated, sea level rises, debris flow is frequent, flood floods occur, urban inland inundation is caused, balance of a natural ecological system is damaged, and living environment of human beings is threatened. Rainwater infiltration is an important process of natural water circulation, however, facilities such as urban hardened pavements cut off the infiltration of surface water, so that the water level of urban underground water is reduced, the ground drainage pressure is increased, and the urban inland inundation is caused by unsmooth drainage, so that the traffic is inconvenient, and the loss of lives and properties of people is caused. Therefore, the construction of natural reserves, natural infiltration and natural purification environment-friendly sponge cities becomes one of the major construction projects for city construction.
The permeable building block paving structure, such as sand-based permeable bricks (rocks), cement permeable bricks, ceramic permeable bricks and the like, plays an important role in the construction of sponge cities in China in recent years, and the product has a smooth surface, various colors and shapes, has compressive strength superior to that of permeable concrete and can reach more than 40 MPa. By combining different colors and specifications, various paving effects can be realized, and the composite material is widely applied to places such as roads, parks, parking lots, squares, commercial streets and the like. In addition, part permeable structure does not possess rainwater infiltration ability because of regional ground osmotic coefficient is lower, or because of regional water resource is comparatively barren, often lays waterproof geotextile in permeable structure layer lower part to collect the retrieval and utilization to the rainwater.
Based on the characteristics, when the water permeable structure is newly built, the engineering requirements of large-scale disassembly and large-scale construction are often met. As the paving materials of all layers of the existing non-permeable structure are not permeable, the comprehensive excavation needs to be carried out, and the ground excavation depth can reach 300-500 mm. And a large amount of low-quality construction waste is generated after the construction waste is removed, and a large amount of energy and land resources are consumed in the transportation, storage and consumption processes of the construction waste. When the structure is newly built, a large amount of natural resources or building materials such as sand, concrete, permeable building blocks and the like need to be added again. In addition, because the scale of the engineering excavation and the new construction is large and the period is long, the method also has certain influence on surrounding residents and the environment.
In conclusion, although the newly-built permeable block brick paving structure plays a good positive role in the aspects of urban landscape, flood control, waterlogging reduction, groundwater recharge and the like, the conventional technology has the problems of high resource and energy consumption, high building waste yield, high interference of residents and the like in the building process. In addition, the permeable pavement structure is different from common cement concrete, has special requirements on raw materials, product production and structural construction, is constructed on a large scale in partial areas of China, and has certain technical, economic and resource limitations.
Disclosure of Invention
The invention aims to provide a permeable transformation technology based on the existing road base, which has the characteristics of material saving, consumption reduction and quick construction, and is convenient for large-scale popularization and application of a permeable concrete pavement structure.
The invention provides a water permeability improvement technology based on an existing road base course, which comprises the following steps:
firstly, a drain pipe and a water storage tank are constructed on an existing road base layer, then a permeable layer is laid on the surface of the modified existing road base layer, and the permeable modification of the existing road base layer is completed.
The permeable building block structure pavement is a common permeable structure in sponge city construction in China, when the structure is newly built, an existing impermeable structure needs to be dismantled and then rebuilt, the process has the characteristics of large dismantling engineering quantity, high building waste yield, large scale of new material investment and the like, and especially for super-large cities, the challenges of large resources and environments are faced in the aspects of disposing of building waste and obtaining of building materials. In order to solve the problems, the invention provides a water permeable reconstruction technology based on an existing road base layer, firstly, a drain pipe and a water storage tank are constructed on the existing road base layer, so that the existing road base layer and the existing cushion layer have the rainwater infiltration function, the removal and reconstruction of the existing road base layer and the existing cushion layer are avoided, meanwhile, the water storage tank can temporarily collect surface runoff to increase the flood discharge effect of an upper structure. Then, a permeable layer is laid on the surface of the transformed existing roadbed layer, and the transformation of the impermeable existing roadbed layer is further completed. Therefore, the permeable transformation technology has the characteristics of material saving, consumption reduction and quick construction, solves the problems that when a permeable structure is newly built, large-scale disassembly and large-scale construction are required, a large amount of building garbage is generated, and a large amount of building materials are required to be input again, and is convenient for large-scale popularization and application of a permeable concrete pavement structure.
Further, the method specifically comprises the following steps:
s1, removing the surface layer and the leveling layer of the impervious pavement to expose the existing roadbed layer;
s2, constructing a drainage pipe from the existing road base layer to the existing cushion layer on the existing road base layer;
s3, constructing a water storage tank in the existing roadbed layer, and communicating the water storage tank with the water drainage pipe;
and S4, paving a water-permeable leveling layer and a water-permeable surface layer on the surface of the transformed existing road base layer in sequence.
In order to solve the challenges in the process of dismantling and rebuilding the existing road with the waterproof structure, the invention discloses a water-permeable road reconstruction technology based on the existing road base layer, wherein firstly, a surface layer and a leveling layer of the waterproof pavement are dismantled to expose the existing road base layer; then, a drain pipe from the existing roadbed layer to the existing cushion layer is constructed on the existing roadbed layer, so that the existing roadbed layer and the existing cushion layer have the function of rainwater infiltration, and the existing roadbed layer and the existing cushion layer are removed and rebuilt; in order to solve the problems of large surface runoff strength and weak ground permeability of a pavement bottom layer of a proposed project, a water storage tank can be constructed in the existing roadbed layer and is communicated with a water drainage pipe so as to temporarily collect the surface runoff in the water storage tank and increase the flood discharge effect; and finally, paving a permeable leveling layer and a permeable surface layer on the surface of the transformed existing roadbed layer in sequence, and further completing the transformation of the impermeable existing roadbed layer and the existing cushion layer.
Further, step S1 specifically includes: and removing the surface layer and the leveling layer of the impervious pavement, exposing the existing roadbed layer, repairing, compacting and leveling the existing roadbed layer, and spraying waterproof materials or paving waterproof geotextiles on the leveled existing roadbed layer.
In order to slow down or prevent the damage of the service performance of the roadbed, a waterproof material can be sprayed or a waterproof geotextile can be laid on the existing leveled roadbed layer, wherein the waterproof material can be sprayed or the waterproof geotextile can be laid on the top surface of the existing roadbed layer aiming at the hydraulic damage with the strongest destructive power to the service performance of the roadbed so as to slow down or prevent the damage of the service performance of the roadbed.
Further, step S2 specifically includes: and constructing a drain pipe from the existing roadbed layer to the existing cushion layer, inserting a PVC pipe into the drain pipe, uniformly drilling holes on the pipe wall of the existing cushion layer part of the PVC pipe, and filling geotextile into the drilled holes.
The PVC pipe is inserted into the drainage pipe to ensure the stability of a rainwater infiltration channel, the pipe wall of the PVC pipe positioned on the existing cushion layer part is uniformly drilled to ensure the drainage effect of the PVC pipe, and the drilled hole is filled with geotextile to prevent granular substances from blocking the drilled hole.
Further, the diameter of the drain pipe is 20-60mm, and the arrangement density of the drain pipe is 1-5/m2(ii) a The diameter of the drill hole is 2-5 mm.
The diameter of the drainage pipe is determined according to the surface runoff strength, the width of a pavement structure, the elevation change and other parameters, and preferably, the diameter of the drainage pipe is 20-60mm, and the arrangement density is 1-5/m2. And the diameter of a drilled hole on the pipe wall of the PVC pipe positioned on the existing cushion layer part is 2-5mm, and each drilled hole is filled with geotextile so as to prevent granular substances from blocking the drilled hole.
Further, step S3 further includes: and covering a cover plate with a plurality of through holes on the upper covering surface of the water storage tank, and then sequentially covering the water permeable grille and the fiber mesh cloth on the upper surfaces of the water drainage pipe and the through holes.
After the water storage tank is constructed, firstly, a cover plate with a plurality of through holes is arranged on the upper covering surface of the water storage tank to form a drainage grid, so that large particles on the upper portion of the existing roadbed layer are prevented from falling into the water storage tank, and then the water permeable grid and fiber mesh cloth are sequentially covered on the upper surfaces of the drainage pipe and the through holes to prevent upper particles from falling into the water storage tank to influence the quality of drainage water.
Further, the diameter of the water storage tank is 100-600mm, the length of the water storage tank is 200-500mm, and the distribution density of the water storage tank is 1-5/25 m2。
The water storage tank is selectively arranged in the existing road base layer only under the conditions of large surface runoff strength and slow pipeline seepage of the project to be built, and is communicated with the drain pipe to facilitate the drainage of the enriched rainwater, wherein the diameter of the water storage tank is 100-600mm, the length of the water storage tank is 200-500mm, and the arrangement density of the water storage tank is 1-5/25 m2。
Further, the water storage tank is arranged outside the water drainage pipe, and the length of the water drainage pipe extending into the water storage tank is 100-300 mm.
In order to facilitate drainage, the water storage tank is arranged on the outer side of the drain pipe, and the water storage tank is selectively arranged on the outer side of the drain pipe according to the strength of surface runoff of the proposed project. The length of the drain pipe extending into the water storage tank is 100-300mm, and in order to improve the water quality of the downward-seeping rainwater, the length of the drain pipe extending into the water storage tank can be increased so as to improve the retention time of the rainwater in the water storage tank, the water retained in the water storage tank can inevitably undergo the processes of sedimentation, microbial purification and the like, so that the biological purification efficiency is improved, the stagnant water effect is formed, and when the water level rises again due to next rainfall, the purified water is discharged underground, so that the drainage water quality is obviously improved.
Further, step S3 includes burying a filler having a height of 50 to 500mm into the bottom of the water storage tank.
Further, the filler is any one or more of waste brick aggregate, ceramic particles, volcanic rock and film-forming materials.
In order to improve the water quality of surface runoff rainwater in the water storage tank, a packing layer with the height of 50-500mm is arranged at the bottom of the water storage tank, and the packing of the packing layer is any one or more of waste brick aggregate, ceramic particles, volcanic rocks and film-forming materials, so that the enrichment and film-forming propagation of microorganisms by the packing are facilitated.
Compared with the prior art, the water permeable reconstruction technology based on the existing road base layer has the following technical effects:
according to the water permeable reconstruction technology based on the existing road base layer, the drain pipe is arranged on the existing road base layer, so that the existing structure is not dismantled on a large scale in the process of building the water permeable building block pavement structure, and only the water permeable leveling layer and the water permeable surface layer need to be constructed again. The water permeable reconstruction technology has the advantages that the existing road bed layer and the existing cushion layer have the rainwater infiltration function through embedding of the distributed infiltration drain pipes, the water permeable construction is newly built with small engineering quantity, the generation of construction waste is reduced, the investment of building materials such as natural sand stones, cement and concrete is saved, the engineering period can be shortened, the influence on surrounding residents and the environment is reduced, and the large-scale popularization and application of the water permeable concrete pavement structure are facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of a permeable road paving structure based on an existing road base layer according to the present invention;
fig. 2 is a schematic view of a preferred technical scheme of a permeable road pavement structure based on an existing road base layer.
Description of reference numerals:
1: an existing cushion layer; 2: an existing roadbed layer; 3: a permeable leveling layer; 4: a water permeable facing; 5: a drain pipe; 6: drilling; 7: a water storage tank; 8: a cover plate; 9: and (4) filling.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The water permeable reconstruction technology based on the existing road base layer is applied to the reconstruction of the road structure of a certain parking lot and a park.
Example 1
The existing pavement structure of a parking lot in a certain residential area is paved by waterproof building blocks, the rock soil at the bottom layer of the pavement structure is sandy soil, and the permeability coefficient is 6 × 10-5m/s. At present, due to transformation, the surface layer needs to be replaced, the parking lot is transformed into a permeable structure, and the permeability coefficient is 0.2mm/s after the permeable structure is transformed.
The road reconstruction method comprises the following steps:
s11, removing a surface layer and a leveling layer of the impervious pavement to expose the existing roadbed layer 2, repairing, compacting and leveling the existing roadbed layer 2, and spraying waterproof materials on the leveled existing roadbed layer 2;
s12, constructing a drain pipe 5 with the length of 400mm and the diameter of 20mm from the existing roadbed layer 2 to the existing cushion layer 1, inserting the existing cushion layer 1 into the tail end of the drain pipe 5, namely tamping a sand soil layer, wherein the gap of the drain pipe 5 is 0.5m multiplied by 0.5m, inserting a PVC pipe with the outer diameter of 20mm into the drain pipe 5, uniformly drilling holes 6 in the pipe wall of the PVC pipe on the existing cushion layer 1 part, and filling geotextile into the drilled holes 6, wherein the diameter of the drilled holes 6 is 2 mm;
s13, covering a stainless steel grid and fiber mesh cloth on the opening of the PVC pipe;
s14, paving a water permeable leveling layer 3 and a water permeable surface layer 4 on the surface of the transformed existing road base layer 2 in sequence, wherein the water permeable leveling layer 3 and the water permeable surface layer 4 are conventional water permeable bricks.
Example 2
The existing road structure of a park square is a waterproof asphalt pavement, the bottom rock and soil of the pavement structure is a gravel layer, and the permeability coefficient is 8 × 10-4m/s. At present, the surface layer needs to be replaced due to transformation, the square is transformed into a water permeable structure, and the water permeability coefficient is 1.2mm/s after the water permeable transformation.
The road reconstruction method comprises the following steps:
s21, removing a surface layer and a leveling layer of the waterproof pavement to expose the existing roadbed layer 2, repairing, compacting and leveling the existing roadbed layer 2, and paving a waterproof geotextile on the leveled existing roadbed layer 2;
s22, constructing a drain pipe 5 with the length of 400mm and the diameter of 50mm from the existing roadbed layer 2 to the existing cushion layer 1, inserting the existing cushion layer 1 into the tail end of the drain pipe 5, namely tamping a sand soil layer, wherein the gap of the drain pipe 5 is 1m multiplied by 1m, inserting a PVC pipe with the outer diameter of 50mm into the drain pipe 5, uniformly drilling holes 6 in the pipe wall of the PVC pipe on the existing cushion layer 1 part, and then filling geotextile into the drilled holes 6;
s23, in order to increase the infiltration speed of rainwater in the center of the square and areas with low terrain and reduce surface runoff drainage, a water storage tank 7 is constructed outside the drain pipe 5, the water storage tank 7 is a corrugated pipe with the diameter of 500mm multiplied by 300mm, the maximum water storage capacity of the corrugated pipe is 58L, and the installation gap is 5m multiplied by 5 m. The upper part of the water storage tank 7 is covered with a reinforced concrete cover plate 8 with the diameter of 550mm multiplied by the height of 100mm, the surface of the cover plate 8 is provided with 3 groups of through holes with the diameter of 40mm, and then a water permeable grid and fiber mesh cloth are sequentially covered on the upper surfaces of the drain pipe 5 and the through holes;
s24, paving a water permeable leveling layer 3 and a water permeable surface layer 4 on the surface of the transformed existing road base layer 2 in sequence, wherein the water permeable leveling layer 3 and the water permeable surface layer 4 are conventional water permeable bricks.
Example 3
The existing road structure of a certain residential area is a waterproof asphalt pavement road surface, the rock soil at the bottom layer of the pavement structure is a gravel layer, and the permeability coefficient is 4 × 10-4m/s. Now, because of the transformation, the surface layer needs to be replaced, the ground is transformed into a water permeable structure, after the water permeable transformation,the water permeability coefficient is 1.0 mm/s.
The road reconstruction method comprises the following steps:
s31, removing a surface layer and a leveling layer of the waterproof pavement to expose the existing roadbed layer 2, repairing, compacting and leveling the existing roadbed layer 2, and paving a waterproof geotextile on the leveled existing roadbed layer 2;
s32, constructing a drain pipe 5 with the length of 400mm and the diameter of 35mm along the existing roadbed layer 2 to the existing cushion layer 1, inserting the existing cushion layer 1 into the tail end of the drain pipe 5, namely tamping a sandy soil layer, wherein the gap of the drain pipe 5 is 0.5m multiplied by 1m, inserting a PVC pipe with the outer diameter of 35mm into the drain pipe 5, uniformly drilling holes 6 in the pipe wall of the PVC pipe on the existing cushion layer 1 part, and filling geotextile into the drilled holes 6, wherein the diameter of the drilled holes 6 is 2 mm;
s33, in order to increase the infiltration speed of rainwater in the center of a community and areas with low terrain and reduce surface runoff drainage, a water storage tank 7 is constructed outside the drain pipe 5, the water storage tank 7 is a corrugated pipe with the diameter of 600mm multiplied by 200mm, the maximum water storage capacity of the corrugated pipe is 58L, and the installation gap is 3m multiplied by 3 m. The upper part of the water storage tank 7 is covered with a reinforced concrete cover plate 8 with the diameter of 650mm multiplied by the height of 100mm, the surface of the cover plate 8 is provided with 4 groups of through holes with the diameter of 40mm, and then a water permeable grid and fiber mesh cloth are sequentially covered on the upper surfaces of the drain pipe 5 and the through holes;
s34, paving a water permeable leveling layer 3 and a water permeable surface layer 4 on the surface of the transformed existing road base layer 2 in sequence, wherein the water permeable leveling layer 3 and the water permeable surface layer 4 are conventional water permeable bricks.
Therefore, after the water permeability improvement technology is used for improving the road surfaces of parking lots, parks and districts, the corresponding water permeability coefficients are respectively 6 × 10-5m/s、8×10-4m/s、4×10-4The m/s increased to 0.2mm/s, 1.2mm/s and 1.0 mm/s.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a transformation technique permeates water based on existing road basic unit which characterized in that includes following step:
firstly, a drain pipe (5) and a water storage tank (7) are constructed on an existing road base layer (2), then a permeable layer is laid on the surface of the transformed existing road base layer (2), and the transformation of the permeable of the existing road base layer is completed.
2. The water permeable modification technique of claim 1, which comprises the following steps:
s1, removing the surface layer and the leveling layer of the impervious pavement to expose the existing roadbed layer (2);
s2, constructing a drain pipe (5) from the existing road base layer (2) to the existing cushion layer (1) on the existing road base layer (2);
s3, constructing a water storage tank (7) in the existing roadbed layer (2), and enabling the water storage tank (7) to be communicated with the drain pipe (5);
s4, paving a water permeable leveling layer (3) and a water permeable surface layer (4) on the surface of the transformed existing road base layer (2) in sequence.
3. The water permeable modification technology of claim 2, wherein the step S1 specifically includes: and (2) removing the surface course and the leveling layer of the impervious pavement, exposing the existing roadbed layer (2), repairing, compacting and leveling the existing roadbed layer (2), and spraying waterproof materials or paving waterproof geotextiles on the existing roadbed layer (2) after leveling.
4. The water permeable modification technology of claim 2, wherein the step S2 specifically includes: the method comprises the following steps that a drain pipe (5) is constructed from the existing roadbed layer (2) to the existing cushion layer (1), a PVC pipe is inserted into the drain pipe (5), and after holes (6) are uniformly drilled in the pipe wall of the existing cushion layer (1) part of the PVC pipe, geotextile is filled in the drilled holes (6).
5. Water permeable renovation technique according to claim 4, characterized in that the diameter of the drain pipe (5) is 20-60mm, and the arrangement density of the drain pipe (5) is 1-5 pieces/m2(ii) a The diameter of the drill hole (6) is 2-5 mm.
6. The water permeable modification technique of claim 2, wherein the step S3 further comprises: and covering a cover plate (8) with a plurality of through holes on the upper covering surface of the water storage tank (7), and then sequentially covering the water permeable grating and the fiber mesh cloth on the upper surfaces of the drain pipe (5) and the through holes.
7. The water permeable reconstruction technique as claimed in claim 6, wherein the diameter of the water storage tank (7) is 100-600mm, the length is 200-500mm, and the arrangement density of the water storage tank (7) is 1-5/25 m2。
8. The water permeable reconstruction technique according to claim 6, characterized in that the water storage tank (7) is arranged outside the water discharge pipe (5), and the length of the water discharge pipe (5) extending into the water storage tank (7) is 100mm and 300 mm.
9. The water permeable reforming technique according to claim 6, wherein the step S3 further comprises embedding a filler (9) with a height of 50-500mm into the bottom of the water storage tank (7).
10. The water permeable modification technique of claim 9, wherein the filler (9) is any one or more of waste brick aggregate, ceramic particles, volcanic rock and film-forming material.
CN202010630245.8A 2020-07-03 2020-07-03 Water permeable reconstruction technology based on existing road base layer Withdrawn CN111749073A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113062168A (en) * 2021-03-17 2021-07-02 中国一冶集团有限公司 Method for improving water permeability of pavement
CN115450114A (en) * 2022-10-28 2022-12-09 中建七局交通建设有限公司 A drainage structure and its construction method for prolonging the service life of asphalt bridge deck

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113062168A (en) * 2021-03-17 2021-07-02 中国一冶集团有限公司 Method for improving water permeability of pavement
CN115450114A (en) * 2022-10-28 2022-12-09 中建七局交通建设有限公司 A drainage structure and its construction method for prolonging the service life of asphalt bridge deck

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