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CN114508019A - Urban tunnel drainage system based on sponge city idea - Google Patents

Urban tunnel drainage system based on sponge city idea Download PDF

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Publication number
CN114508019A
CN114508019A CN202210289545.3A CN202210289545A CN114508019A CN 114508019 A CN114508019 A CN 114508019A CN 202210289545 A CN202210289545 A CN 202210289545A CN 114508019 A CN114508019 A CN 114508019A
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CN
China
Prior art keywords
water
permeable
layer
drainage system
urban
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210289545.3A
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Chinese (zh)
Inventor
蒋有有
江文烨
张天义
孙萌阳
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Changan University
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Changan University
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Filing date
Publication date
Application filed by Changan University filed Critical Changan University
Priority to CN202210289545.3A priority Critical patent/CN114508019A/en
Publication of CN114508019A publication Critical patent/CN114508019A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C7/00Coherent pavings made in situ
    • E01C7/08Coherent pavings made in situ made of road-metal and binders
    • E01C7/32Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
    • E01C7/34Coherent 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
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00Details of pavings
    • E01C11/22Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E01C11/224Surface drainage of streets
    • E01C11/225Paving specially adapted for through-the-surfacing drainage, e.g. perforated, porous; Preformed paving elements comprising, or adapted to form, passageways for carrying off drainage
    • E01C11/226Coherent pavings
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00Details of pavings
    • E01C11/22Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
    • E01C11/224Surface drainage of streets
    • E01C11/227Gutters; Channels ; Roof drainage discharge ducts set in sidewalks
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F3/00Sewer pipe-line systems
    • E03F3/04Pipes or fittings specially adapted to sewers
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/04Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0401Gullies for use in roads or pavements
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/101Dedicated additional structures, interposed or parallel to the sewer system
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/10Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/105Accessories, e.g. flow regulators or cleaning devices
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F16/00Drainage
    • E21F16/02Drainage of tunnels
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/30Flood prevention; Flood or storm water management, e.g. using flood barriers

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Public Health (AREA)
  • Health & Medical Sciences (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Lining And Supports For Tunnels (AREA)

Abstract

The invention discloses an urban tunnel drainage system based on a sponge city idea, wherein a water seepage road section with a certain length is arranged at a tunnel portal, the water seepage road section comprises a water seepage surface layer, a water seepage base layer and a soil layer from top to bottom, the water seepage surface layer is paved by using water seepage concrete containing diatomite and water seepage concrete containing fly ash, and the water seepage base layer is in contact with the soil by adopting coarse aggregate. Make water not influenced by capillary phenomenon and rise when conveniently discharging the water to the road bed, can effectively increase the permeation rate, solve traditional concrete void structure control difficulty, the easy problem of blockking up. The problem that water is difficult to accumulate when water is drained from the urban underpass tunnel portal is solved by combining a sponge urban drainage system, the problem of disease recurrence in the later period can be avoided, and the treatment method is strong in operability, safe and reliable and has good economic benefits.

Description

Urban tunnel drainage system based on sponge city idea
Technical Field
The invention relates to the technical field of tunnel drainage, in particular to an urban tunnel entrance drainage system based on a sponge city concept.
Background
At present, in the urban general planning stage of domestic cities, the shunt system is generally determined as the drainage system of the urban drainage pipe network system, and the shunt system is used as the planning guidance basis in the construction implementation stage. The shutoff type combined flow system is only used as a transition form in the construction process of the split flow system, and the split flow system is finally required to be realized in the urban drainage pipe network system under the guidance of planning.
In recent years, as the environmental bearing pressure is gradually increased, when the weather is greatly changed, the urban water ecology is easy to have extreme problems in two aspects: on one hand, the potential safety hazard exists in part of cities in rainy days, and the urban development is influenced due to serious waterlogging when the precipitation is large; on the other hand, most cities lack stable natural water resources, and the water supply is seriously insufficient.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an urban tunnel entrance drainage system based on a sponge city idea, which effectively solves the problem of a treatment structure for serious accumulated water in a tunnel.
The invention is realized by the following technical scheme:
a city tunnel drainage system based on a sponge city idea comprises a water seepage section with a preset length arranged at a tunnel portal, wherein a water intercepting ditch is arranged at the junction of the water seepage section and the tunnel portal, the water intercepting ditch is arranged along the width direction of the water seepage section, and two ends of the water intercepting ditch are connected with a water collecting system;
the permeable road section comprises a permeable surface layer, a permeable base layer and a soil layer from top to bottom, the permeable surface layer is made of permeable concrete containing diatomite and permeable concrete containing fly ash and used for guiding permeated rainwater to the intercepting ditch, the permeable base layer is made of coarse aggregate materials and used for preventing underground water from rising due to capillary phenomenon, and meanwhile, redundant moisture is collected at the position and enters the drainage system.
Preferably, the permeable surface layer comprises a first permeable layer and a second permeable layer which are laid from top to bottom, the second permeable layer is laid on the surface of the permeable base layer, the second permeable layer is made of permeable concrete containing fly ash, and the first permeable layer is made of permeable concrete containing diatomite.
Preferably, a straight-through type water permeable channel is arranged in the first water permeable layer.
Preferably, the bone ash ratio of the first permeable layer and the second permeable layer is 3-4, the water-cement ratio is 0.2-0.3, the compressive strength is controlled to be 15-35 MPa, and the flexural strength is controlled to be 3-5 MPa.
Preferably, the end parts of the permeable surface layer and the permeable base layer, which are close to the tunnel portal, are provided with end surface permeable layers.
Preferably, the end surface permeable layer is made of permeable concrete containing fly ash or permeable concrete containing diatomite.
Preferably, the permeable base layer is formed by paving coarse aggregates with the particle size larger than 5mm, and the paving thickness is 20-30 cm.
Preferably, the water collecting system is a water collecting well and an urban water recycling system;
and water collecting wells are arranged at two ends of the intercepting ditch and are connected with the urban water recycling system through drain pipes.
Preferably, both sides of the water seepage section are provided with intercepting ditches which are communicated with the intercepting ditches at the end part of the water seepage section.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention discloses an urban tunnel drainage system based on a sponge city idea, wherein a water seepage road section with a certain length is arranged at a tunnel portal, the water seepage road section comprises a water seepage surface layer, a water seepage base layer and a soil layer from top to bottom, the water seepage surface layer is formed by paving water seepage concrete containing diatomite and water seepage concrete containing fly ash, and the water seepage base layer is formed by directly contacting a coarse aggregate with the soil layer. Make water not influenced by capillary phenomenon and rise when conveniently discharging the water to the road bed, can effectively increase the permeation rate, solve traditional concrete void structure control difficulty, the easy problem of blockking up. The problem that water is difficult to accumulate when water is drained from the urban underpass tunnel portal is solved by combining a sponge urban drainage system, the problem of disease recurrence in the later period can be avoided, and the treatment method is strong in operability, safe and reliable and has good economic benefits.
Further, be provided with through type permeable channel in the first permeable bed, increase rivers infiltration rate prevents that the precipitation from gathering in a large number when great surface water from influencing driving safety, solves the difficult and easy problem of blockking up of traditional concrete void structure control.
Furthermore, the compressive strength of the mixture in the first permeable layer and the second permeable layer is controlled to be 15-35 MPa, the breaking strength is controlled to be 3-5 MPa, and the service life of the pavement is prolonged.
Furthermore, the permeable base layer is formed by paving coarse aggregates with the particle size larger than 5mm, and the coarse aggregate particles have the effects of improving the strength of the roadbed, removing the capillary action of underground water and effectively preventing the damage of the foundation. Rainwater passing through the two permeable layers flows into the intercepting ditch along the soil layer through the gap between the coarse aggregates. Meanwhile, the coarse aggregate can prevent water from rising under the influence of capillarity, namely, the water in the soil layer is prevented from permeating upwards.
Drawings
FIG. 1 is an application diagram of an urban tunnel drainage system based on the sponge city concept;
FIG. 2 is a transverse section view of an urban tunnel drainage system based on the sponge city concept;
FIG. 3 is a cross-sectional view of a permeable section of the present invention;
FIG. 4 is a longitudinal cross-sectional view of a water-permeable section according to the present invention;
FIG. 5 is a cross-sectional view of the intercepting drain of the present invention.
In the figure: 1. a first water permeable layer; 2. a second water permeable layer; 3. a coarse aggregate layer; 4. a soil layer; 5. a drain pipe; 6. intercepting a ditch; 7. a water collecting well 8 and a transverse pervious concrete layer.
Detailed Description
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.
Referring to fig. 1-5, an urban tunnel drainage system based on a sponge city concept comprises a water seepage section with a preset length arranged at a tunnel portal, wherein a water intercepting ditch is arranged at the junction of the water seepage section and the tunnel portal, the water intercepting ditch is arranged along the width direction of the water seepage section, and two ends of the water intercepting ditch are connected with a water collecting system.
The permeable road section comprises a permeable surface layer, a permeable base layer 3 and a soil layer 4 from top to bottom, the permeable surface layer is made of permeable concrete containing diatomite and permeable concrete containing fly ash and used for guiding permeated rainwater to the intercepting ditch, the permeable base layer 3 is used for preventing underground water from rising due to capillary phenomenon, and meanwhile, redundant moisture is collected at the position and enters the drainage system.
Referring to fig. 3, the permeable surface layer includes a first permeable layer 1 and a second permeable layer 2 laid from top to bottom, the second permeable layer 2 is laid on the surface of the permeable base layer, the second permeable layer 2 is made of permeable concrete containing fly ash, the first permeable layer 1 is made of permeable concrete containing diatomite, the permeable concrete belongs to an ecological pavement building material, and when rainwater is more, part of rainwater can be intercepted.
A plurality of through type permeable channels are arranged in the first permeable layer 1, so that the water flow infiltration rate is increased, and the influence of large accumulation of surface water on traffic safety when the precipitation amount is large is prevented. First permeable bed 1 and vehicle and external rivers direct contact adopt the penetration rate of through type structure increase water, and the reinforcing bar is reserved before adopting the initial concrete that solidifies in the structural design, takes out the reinforcing bar before the concrete condenses to finish, forms the even through type passageway that permeates water in space, solves the difficult and easy problem that blocks up of traditional concrete void structure control.
The tip that the highway section of permeating water is close to the tunnel portal is provided with terminal surface permeable bed 8, terminal surface permeable bed 8 is and lie in the intercepting ditch, terminal surface permeable bed 8 covers first permeable bed 1, second permeable bed 2 and the basic unit 3 that permeates water, terminal surface permeable bed 8's material is the same, first permeable bed 1, second permeable bed 2 and permeate water basic unit 3's infiltration pass through terminal surface permeable bed 8 and get into in the intercepting ditch, terminal surface permeable bed 8 guarantees the surface course that permeates water and 3 tip intensity of basic unit that permeate water simultaneously, avoid collapsing.
The concrete in the first permeable layer 1 and the second permeable layer 2 adopts high-grade cement as a cementing material, the bone ash ratio is 3-4, the water-cement ratio is 0.2-0.3, the compressive strength is controlled at 15-35 MPa, and the flexural strength is controlled at 3-5 MPa.
The permeable base layer 3 is formed by paving coarse aggregates with the particle size larger than 5mm, the paving thickness is 20-30cm, the coarse aggregate particles have the effects of improving the strength of the roadbed, removing the capillary action of underground water and effectively preventing the damage of the foundation. Rainwater passing through the two permeable layers flows into the intercepting ditch along the soil layer through the gap between the coarse aggregates. Meanwhile, the coarse aggregate can prevent water from rising due to the influence of capillary phenomenon, namely, water in a soil layer is prevented from permeating upwards, and if underground water is too abundant to flow upwards, the upwards overflowing underground water can flow to a water intercepting ditch along the gradient of the tunnel inlet longitudinal slope through the coarse aggregate layer and finally flows into the urban sponge system.
Referring to fig. 2, in this embodiment, the tunnel is a sinking tunnel, the water-permeable section has a certain downward gradient, and the cross section of the intercepting ditch is 60 × 60cm and is located at a gentle junction of the tunnel entrance, so that the water storage capacity is increased, rainwater which does not penetrate into the road surface is prevented from flowing into the tunnel, and the risk of waterlogging of the sinking tunnel is reduced.
Referring to fig. 4, the water collecting system is a water collecting well and a city water recycling system, the water collecting well 7 is arranged at each of two ends of the intercepting ditch, the intercepting ditch 6 collects water flow on the road surface and seeps downwards, the collected water flow enters the water collecting well 7, water in the water collecting well flows into a pre-laid pipeline of the city sponge engineering through a water drainage pipe 5, the water drainage pipe 5 is buried in a soil layer, and the collected water flow enters the city water recycling system through the water drainage pipe, so that the purpose of recycling is achieved.
In another embodiment, intercepting ditches are also arranged on two sides of the water seepage section, and the lower ends of the intercepting ditches are connected with the water collecting well.
The urban tunnel drainage system based on the sponge city idea comprises an intercepting ditch, a water seepage path section and a water collecting well, wherein the water seepage path section consists of permeable concrete containing diatomite, and rainwater permeates into a road surface through the water seepage path section with a certain slope or directly flows into the intercepting ditch from the road surface and then flows into a drainage pipeline of the sponge city through the water collecting well. The permeable surface layer of the permeable belt adopts construction methods of permeable concrete containing diatomite and permeable concrete double-faced layers containing fly ash, and the drainage capacity is further improved. Water penetrates through the coarse aggregate part of the permeable surface layer and the permeable base layer to enter the soil layer, underground water resources can be compensated due to the fact that soil has certain water storage capacity, and the water penetrating into the soil is easy to exchange heat and moisture with air, so that the temperature and humidity of the urban ground surface are adjusted. However, the water storage capacity of the soil is limited, the water storage capacity of the soil is far from insufficient in extreme flood weather, when the soil moisture is saturated, the soil can be used as a waterproof layer, surface water seeped from the upper part and underground water seeped from the lower part can be collected above the soil, and the soil downwards flows into the intercepting ditch and the collecting well from the gap of the coarse aggregate and is collected into the urban sponge system. The side of the intercepting ditch close to the slope is made of water-permeable material so that underground collected water can be drained into the intercepting ditch. The coarse aggregate layer 3 has larger gaps, so that water is prevented from rising under the influence of capillary phenomenon while infiltration and circulation are facilitated.
The invention discloses a city tunnel drainage system design based on a sponge city idea, which is characterized in that permeable concrete containing diatomite and permeable concrete containing fly ash are adopted to form a through type permeable channel at a tunnel entrance by paving reserved steel bars, and the permeable concrete are dismantled in the later period, the lower part of the permeable channel is in contact with soil by adopting coarse aggregate, so that water is conveniently discharged to a soil foundation, the water is not influenced by capillarity and rises, the permeation rate can be effectively increased, and the problems that the traditional concrete gap structure is difficult to control and easy to block are solved. The problem that water is difficult to accumulate when water is drained from the urban underpass tunnel portal is solved by combining a sponge urban drainage system, the problem of disease recurrence in the later period can be avoided, and the treatment method is strong in operability, safe and reliable and has good economic benefits. The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims (9)

1. A city tunnel drainage system based on a sponge city idea is characterized by comprising a water seepage section with a preset length arranged at a tunnel portal, wherein a water intercepting ditch is arranged at the junction of the water seepage section and the tunnel portal and is arranged along the width direction of the water seepage section, and two ends of the water intercepting ditch are connected with a water collecting system;
the permeable road section comprises a permeable surface layer, a permeable base layer (3) and a soil layer (4) from top to bottom, the permeable surface layer is made of permeable concrete containing diatomite and permeable concrete containing fly ash and used for guiding permeated rainwater to the intercepting ditch, the permeable base layer (3) is made of a coarse aggregate material and used for preventing underground water from rising due to capillary phenomenon, and meanwhile, redundant moisture is collected at the position and enters a drainage system.
2. The urban tunnel drainage system based on the sponge city idea as claimed in claim 1, wherein the water permeable surface layer comprises a first water permeable layer (1) and a second water permeable layer (2) laid from top to bottom, the second water permeable layer (2) is laid on the surface of the water permeable base layer, the second water permeable layer (2) is made of water permeable concrete containing fly ash, and the first water permeable layer (1) is made of water permeable concrete containing diatomite.
3. Urban tunnel drainage system based on the sponge city concept according to claim 2, characterized in that a straight-through type water-permeable channel is arranged in the first water-permeable layer (1).
4. The urban tunnel drainage system based on the sponge city concept as claimed in claim 2, wherein the bone ash ratio of the first water permeable layer (1) and the second water permeable layer (2) is 3-4, the water-cement ratio is 0.2-0.3, the compressive strength is controlled to be 15-35 MPa, and the flexural strength is controlled to be 3-5 MPa.
5. The urban tunnel drainage system based on the sponge city concept as claimed in claim 1, wherein the water permeable surface layer and the water permeable base layer (3) are provided with end surface water permeable layers (8) at the ends close to the tunnel entrance.
6. Urban tunnel drainage system based on the sponge city concept as claimed in claim 5, wherein the end permeable layer (8) is made of permeable concrete containing fly ash or permeable concrete containing diatomite.
7. The urban tunnel drainage system based on the sponge city concept as claimed in claim 1, wherein the permeable base layer (3) is laid by coarse aggregate with a particle size of more than 5mm, and the laying thickness is 20-30 cm.
8. The urban tunnel drainage system based on the sponge city concept according to claim 1, wherein the water collection system is a water collection well and an urban water recycling system;
and water collecting wells (7) are arranged at two ends of the intercepting ditch and are connected with the urban water recycling system through drain pipes (5).
9. The urban tunnel drainage system based on the sponge city concept as claimed in claim 1, wherein intercepting ditches are arranged on both sides of the water seepage section and are communicated with the intercepting ditches at the end of the water seepage section.
CN202210289545.3A 2022-03-23 2022-03-23 Urban tunnel drainage system based on sponge city idea Pending CN114508019A (en)

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Application Number Priority Date Filing Date Title
CN202210289545.3A CN114508019A (en) 2022-03-23 2022-03-23 Urban tunnel drainage system based on sponge city idea

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Application Number Priority Date Filing Date Title
CN202210289545.3A CN114508019A (en) 2022-03-23 2022-03-23 Urban tunnel drainage system based on sponge city idea

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CN114508019A true CN114508019A (en) 2022-05-17

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006054527A1 (en) * 2005-11-15 2007-10-11 Bgd Boden- Und Grundwasserlabor Gmbh Dresden Drainage system for removing water from roads and tunnels comprises collecting channels arranged in a drainage system and having a double drainage pipe arrangement with drainage pipes moving against each other
CN104478361A (en) * 2014-12-24 2015-04-01 扬州大学 Permeable recycled aggregate and ceramsite concrete doped with industrial and agricultural solid waste and preparation
CN104975877A (en) * 2015-07-08 2015-10-14 甘肃路桥建设集团有限公司 Portal external road surface water blocking and discharging system with tunnel portal in downslope direction and manufacturing method for same
CN206828912U (en) * 2017-06-26 2018-01-02 湖南顺天建设集团有限公司 A kind of full pervious concrete pavement structure of regeneration aggregate
CN109020343A (en) * 2018-09-20 2018-12-18 吉林大学 The modified water-permeable cement concrete of diatomite-flyash-silicon ash

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006054527A1 (en) * 2005-11-15 2007-10-11 Bgd Boden- Und Grundwasserlabor Gmbh Dresden Drainage system for removing water from roads and tunnels comprises collecting channels arranged in a drainage system and having a double drainage pipe arrangement with drainage pipes moving against each other
CN104478361A (en) * 2014-12-24 2015-04-01 扬州大学 Permeable recycled aggregate and ceramsite concrete doped with industrial and agricultural solid waste and preparation
CN104975877A (en) * 2015-07-08 2015-10-14 甘肃路桥建设集团有限公司 Portal external road surface water blocking and discharging system with tunnel portal in downslope direction and manufacturing method for same
CN206828912U (en) * 2017-06-26 2018-01-02 湖南顺天建设集团有限公司 A kind of full pervious concrete pavement structure of regeneration aggregate
CN109020343A (en) * 2018-09-20 2018-12-18 吉林大学 The modified water-permeable cement concrete of diatomite-flyash-silicon ash

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Application publication date: 20220517

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