CN106638916B

CN106638916B - A modularization rainwater collection pipe device for sponge city

Info

Publication number: CN106638916B
Application number: CN201610963656.2A
Authority: CN
Inventors: 古励; 石敬华; 唐立展; 任杨; 薛蕊; 何强; 李果
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2016-11-04
Filing date: 2016-11-04
Publication date: 2020-08-11
Anticipated expiration: 2036-11-04
Also published as: CN106638916A

Abstract

The invention discloses a modular rainwater collecting pipeline device for a sponge city, which comprises a box body, wherein the top surface and the bottom surface of the box body are opened, a triangular weir plate and a water passing baffle are respectively erected in the box body close to two side walls, a silt settling area is formed between one side wall of the box body and the triangular weir plate, a filtering area is formed between the triangular weir plate and the water passing baffle, an overflow area is formed between the water passing baffle and the other side wall of the box body, a rainwater grate is arranged at the opening at the top of the box body of the silt settling area, a lifting cage is arranged below the rainwater grate, clay for planting evergreen plants is filled in the filtering area, the overflow area is divided into an upper part and a lower part by a water permeable pore plate, a gravel filtering layer is filled in the upper part of the overflow area, the lower part of the overflow area is divided into an. The invention has the technical effects that: by the splicing combination of the modules, the construction process of the infiltration greenbelt can be rapidly completed, and the construction efficiency is improved.

Description

A modularization rainwater collection pipe device for sponge city

Technical Field

The invention belongs to the technical field of urban rainwater treatment and non-point source pollution control, and particularly relates to a permeable greenbelt for a sponge city, which can be spliced, quickly spliced and modularly constructed.

Background

At present, along with the continuous expansion of the urban scale in China, the land utilization type changes greatly, the specific gravity of an impervious road surface is gradually increased, the ground runoff coefficient is obviously increased, and the urban rainfall runoff is increased steeply. Urban non-point source pollution caused by rainwater runoff flushing roads in the rainfall process becomes one of the main causes of urban water quality deterioration.

The construction strength of sponge cities is also increased in domestic cities and towns. Urban "low impact" development/modification is a very important ring in the construction of "sponge cities", such as: utilize the greenery patches around district, square, the road side, construct recessed/infiltration formula greenery patches, collect peripheral surface runoff, through the infiltration process after converge into city rainwater pipe network, reduce the water yield in the city rainwater pipe network, reduce the water pressure of city rainwater pipeline in the torrential rain, carry out filtration process to surface runoff simultaneously, ensure that clean surface runoff gets into pipe-line system, finally converge and accomodate the water.

Because the technology of the existing sponge city aims at the connection of sponge facilities and urban rainwater pipelines, domestic construction teams still do not know the concrete construction method of the sponge city. When the infiltration type green land is built, the problems of runoff collection, garbage screening in runoff, sediment precipitation, rainwater infiltration conveying to a rainwater inspection well, overflow of excessive runoff in a rainstorm period and the like need to be considered. The actual operation effect of the concave green land is greatly influenced by water level elevation control, filler gradation, overflow hole positions, pipeline connection and the like in construction. And domestic construction units often operate roughly, and the aspects of water level elevation, infiltration rainwater pipe conveying, overflow and the like are not considered, so that the use efficiency of the concave green land is reduced.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention aims to provide a modular rainwater collecting pipeline device for a sponge city, which can quickly finish the construction process of infiltration of greenbelt and improve the construction efficiency by splicing and combining modules.

The technical problem to be solved by the invention is realized by the technical scheme, the device comprises a box body, the top surface and the bottom surface of the box body are provided with openings, a triangular weir plate and a water passing baffle are respectively erected in the box body close to two side walls, a silt settling area is formed between one side wall of the box body and the triangular weir plate, a filtering area is formed between the triangular weir plate and the water passing baffle, an overflow area is formed between the water passing baffle and the other side wall of the box body, a rainwater grate is arranged at the opening at the top of the box body of the silt settling area, a lifting cage is arranged below the rainwater grate, clay for planting evergreen plants is filled in the filtering area, the overflow area is divided into an upper part and a lower part by a water permeable pore plate, a gravel filtering layer is filled in the upper part of the overflow area, the lower part of the overflow.

The working process of the invention is as follows: the initial rainfall runoff carries most road pollutants to flow into a primary sedimentation area through a rainwater grate, granular impurities with high density are precipitated in a lifting cage, rainwater water with low density flows into a filtering area from a triangular weir plate, the filtering area is filled with clay and planted with evergreen plants, the rainwater enters a flow passing area through a water passing baffle with the elevation lower than that of the top weir of the triangular weir plate, a water permeable pore plate is arranged in the flow passing area, a gravel filtering layer is filled on the water permeable pore plate, the rainwater enters a flow passing corridor through the gravel filtering layer, a plurality of devices are spliced to form a long-distance flow passing corridor, and the rainwater is introduced into a rainwater inspection well through the flow passing corridor and is discharged into the water.

The invention has the technical effects that:

1. the rainwater collecting and distributing device has the advantages that the collection and distribution of road runoff are realized, rainwater is intercepted, the collection, separation and drainage of the rainwater are realized, the infiltration greenbelt beside the road is provided, the non-point source pollution control and treatment capacity is exerted, and the problem of urban non-point source pollution caused by rainwater runoff scouring the road in the rainfall process is relieved and even solved.

2. The construction method modularizes the infiltration greenbelt commonly used in sponge city construction, integrates functions of runoff collection, runoff garbage removal, multi-sand runoff silt and sand precipitation, rainwater percolation treatment, transmission of percolated clean rainwater to a rainwater inspection well, overflow of excessive runoff in a rainstorm period and the like in the modularized infiltration greenbelt, and rapidly completes construction process of the infiltration greenbelt by modularized splicing and combination of a plurality of modularized infiltration greenbelts. The invention avoids the treatment of water flow direction, elevation, connected pipe network and the like in the construction process, and only needs the steps of ground excavation, module splicing, pipeline installation and backfilling, thereby greatly improving the construction efficiency and the construction precision of the existing concave green land.

Drawings

The drawings of the invention are illustrated as follows:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is a cross-sectional view a-a of fig. 2.

In the figure: 1. a box body; 2. a rainwater grate; 3. lifting the cage; 4. a triangular weir plate; 5. a water passing baffle; 6. a water-permeable pore plate; 7. an overflow corridor; 8. an overflow pipe I, a silt settling area; II, a filtering area; III, a filtering area.

Detailed Description

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

as shown in figures 1, 2 and 3, the invention comprises a box body 1, the top surface and the bottom surface of the box body 1 are opened, a triangular weir plate 4 and a water passing baffle plate 5 are respectively erected in the box body 1 near two side walls, a silt settling area I is formed between one side wall of the box body and the triangular weir plate 4, a filtering area II is formed between the triangular weir plate 4 and the water passing baffle plate 5, an overflow area III is formed between the water passing baffle plate 5 and the other side wall of the box body, a rainwater grate 2 is arranged at the opening at the top of the box body of the silt settling area I, a lifting cage 3 is arranged below the rainwater grate 2, the filtering area II is filled with clay for planting evergreen plants, the overflow area III is divided into upper parts by a, and the lower two parts, namely the upper part of the over-flow area III is filled with a gravel filtering layer, the lower part of the over-flow area III is provided with an over-flow gallery 7, two ends of the over-flow gallery 7 are respectively provided with an overflow pipe 8 which is communicated with the green land on the ground, and the overflow pipe 8 is used for draining excessive rainwater in the green land.

The elevation of the water passing baffle 5 is 17.5 cm lower than the elevation of the weir crest of the triangular weir plate, and the elevation of the water permeable pore plate 6 is 30 cm lower than the elevation of the top end of the water passing baffle 5. The size of the triangular weir in the triangular weir plate 4 and the size of the water permeable hole in the water permeable hole plate 6 can be adjusted according to requirements, and the water flow is adjusted. The overflow pipe 8 is a plastic pipe with the radius of 2 cm and is used for communicating the green land of the road with the water passing gallery.

The lifting cage 3 is used for intercepting the waste residue that flows in from rainwater grate 2, and the lifting cage size appearance cooperatees with box 1, and both ends are furnished with interior knot formula hand, can propose the cleaning with the lifting cage when impurity particle precipitation volume arrives a timing, facilitates the use.

The working principle of the invention is as follows: the initial rainfall in the rainfall process causes the existence of the initial washing impervious pavement of the road, so that the initial rainfall runoff containing most of road surface source pollutants forms runoff under the action of the road gradient. Rainwater gets into the lifting cage 3 through rainwater grate 2 in, the great impurity particle of density deposits, and the less rainwater of density flows through triangle weir plate 4 and the clay of packing, through crossing the gravel of water baffle 5 and packing, gets into through the orifice plate 6 that permeates water and cross the water corridor. The modular device is spliced through socket type water passing holes to form a long-distance water passing gallery, and the terminal device is communicated with the rainwater inspection well. Along with the increase of rainfall duration, rivers increase gradually in the water passing corridor, and the rainwater flows to the rainwater inspection shaft and finally gets into the water through the water passing corridor to effectively realized the purpose of rainwater runoff collection separation.

The modular device is a modular device, and the modular device is spliced to realize the collection and drainage of the road runoff, retain partial pollutants of the rainwater runoff to realize separation, plant evergreen plants to form a concave green land beside the road, so that the non-point source pollution control and treatment capacity is favorably exerted, and the problem of urban non-point source pollution caused by rainwater runoff scouring the road in the rainfall process is effectively relieved or even solved.

The invention also avoids the treatment of water flow direction, elevation, connected pipe networks and the like in the construction process, and only needs the steps of ground excavation, module splicing, pipeline installation and backfilling, thereby greatly improving the construction efficiency and the construction precision of the traditional concave green land.

Claims

1. The utility model provides a modularization rainwater collection pipe device for sponge city, including box (1), characterized by: the top surface and the bottom surface of the box body (1) are opened, a triangular weir plate (4) and a water passing baffle plate (5) are respectively erected in the box body (1) close to two side walls, a silt settling area (I) is formed between one side wall of the box body and the triangular weir plate (4), a filtering area (II) is formed between the triangular weir plate (4) and the water passing baffle plate (5), an overflowing area (III) is formed between the water passing baffle plate (5) and the other side wall of the box body, a rainwater grate (2) is arranged at the opening at the top of the box body of the silt settling area (I), a lifting cage (3) is arranged below the rainwater grate (2), the filtering area (II) is filled with clay for planting evergreen plants, and the overflowing area (III) is divided into upper parts, the lower two parts, the upper part of the over-flow area (III) is filled with a gravel filter layer, the lower part of the over-flow area (III) is provided with an over-flow gallery (7), and two ends of the over-flow gallery (7) are respectively provided with an overflow pipe (8) which is communicated with the green land of the ground; a plurality of modularization rainwater collecting pipe devices are spliced through socket type water passing holes to form a long-distance water passing gallery, and the terminal device is communicated with the rainwater inspection well.

2. The modular storm water collection piping unit for sponge cities as claimed in claim 1 wherein: the elevation of the water passing baffle (5) is 17.5 cm lower than that of the weir crest of the triangular weir plate (4), and the elevation of the water permeable pore plate (6) is 30 cm lower than that of the top end of the water passing baffle (5).