CN110685342A - Rainwater recycling system for sponge city construction - Google Patents

Abstract

The invention discloses a rainwater recycling system for sponge city construction. , the penetrating radiant rainwater well penetrates the inflowing rainwater into the vegetation; the upper part of the penetrating radiant rainwater well is connected to the rainwater grate arranged beside the road through the rainwater communication pipe, and the entrance of the rainwater grate is provided with a rainwater outlet sealing device, which is located at the entrance. Separating the annular water storage tank, the outer bulkhead of the annular water storage tank is provided with a communication port for communicating with the rainwater communication pipe. A channel, the bottom of the rainwater grate at the lower part of the channel is provided with a water outlet, and the water outlet is connected to the reservoir through the rainwater pipeline. The system has good rainwater recycling effect, can effectively reduce the occurrence of urban waterlogging, and has strong natural rainwater purification and recycling capabilities.

Description

Rainwater recycling system for sponge city construction

technical field

The invention relates to the field of sponge city construction, in particular to a rainwater recycling system for sponge city construction.

Background technique

In the current construction of traditional urban drainage facilities, the rainwater grate is generally set on both sides of the road to directly collect the rainwater to the nearby rainwater wells and finally discharge it directly into the natural water system. In larger cases, it is easy to cause urban waterlogging due to insufficient bearing capacity of the drainage system. Not only that, the initial rainwater containing more pollutants will also be directly discharged into the natural water system through the drainage system, directly aggravating the pollution of nearby water bodies.

In order to solve the problems of serious urban water pollution, low utilization rate of rainwater and easy occurrence of waterlogging, combined with the concept of sponge city construction, the use of rainwater through sponge facilities can make it fully absorbed and purified by vegetation and soil, so as to reduce the amount of rainwater discharged. At the same time, it can use rainwater to nourish the vegetation in the green belt on both sides of the road, and also achieve the effect of purifying rainwater by using vegetation and soil. This can not only reduce the burden of the original urban drainage system, but also maximize the city's own water storage and purification capabilities.

Therefore, it is necessary to propose a rainwater recycling system based on the concept of sponge city construction, so that rainwater is no longer directly discharged into the natural water body, but a series of sponge facilities are collected first, infiltrated and purified in the natural environment, and finally converged. It is collected and used in the municipal underground reservoir, which has the effect of reducing urban waterlogging, reducing environmental pollution caused by rainwater and making use of it.

SUMMARY OF THE INVENTION

The present invention mainly aims at the deficiencies of the prior art, and provides a rainwater recycling system for sponge city construction, which can reduce urban waterlogging, reduce environmental pollution caused by rainwater and utilize it.

The technical scheme adopted in the present invention is: a rainwater recycling system for sponge city construction, including a diversion channel, a sunken green space, a permeable radiation rainwater well, a rainwater grate, a rainwater outlet blocking device, and a rainwater communication pipe and cisterns, where:

The diversion channel is set in the road and connected to the sunken green space, and the penetrating radiant rainwater well is arranged in the sunken green space, and the inflowing rainwater is infiltrated through the penetrating radiant rainwater well. For the natural vegetation planted in the sunken green space, the bottom of the permeable radiation rainwater well is also arranged with a seepage pipe and is connected to the reservoir through the seepage pipe;

The upper part of the penetrating radiant rainwater well is arranged with a rainwater communication pipe, and is connected to the rainwater grate arranged by the road through the rainwater communication pipe, and the rainwater inlet blocking device is provided at the entrance of the rainwater grate, so the The rainwater outlet blocking device separates an annular water storage tank with an open top at the entrance, and the outer bulkhead of the annular water storage tank is provided with a communication port for communicating with the rainwater communication pipe, and the annular water storage tank is provided with a communication port for communicating with the rainwater communication pipe. The upper edge of the inner bulkhead of the cabin is higher than the upper edge of the communication port, the interior of the inner bulkhead forms a channel that penetrates up and down, and the bottom of the rainwater grate at the lower part of the channel is provided with a water outlet. The water outlet is connected to the water storage tank through the rainwater pipeline.

In some embodiments of the system of the present invention, the sunken green space is arranged beside a road, the diversion channel runs through both sides of the road, and open curbs are arranged side by side on both sides of the openings at both ends.

In some embodiments of the system of the present invention, a concrete cushion is poured at the lower part of the diversion channel, and expansion joints are provided at intervals on the concrete cushion.

In some embodiments of the system of the present invention, the sunken green space is provided with an energy dissipation and sand sedimentation area at the opening of the diversion channel.

In some embodiments of the system of the present invention, the slope of the side slope of the sunken green space is less than or equal to 1:5, and the height of the top of the sunken green space is lower than the road surface.

In some embodiments of the system of the present invention, the rainwater communication pipe is arranged on the upper part of the wellhead interception frame of the permeable radiant rainwater well, and the pipe center of the rainwater communication pipe is 150 mm away from the bottom of the wellhead interception frame.

In some embodiments of the system of the present invention, the lower opening of the permeable radiant rainwater well forms a permeation zone, the outside of the permeation zone is wrapped with a gravel water permeable layer, and the upper well of the permeable radiant rainwater well is backfilled There is grit.

In some embodiments of the system of the present invention, the bottom of the permeable radiant rainwater well is connected to a backwash water supply pipeline, and the backflush water supply pipeline is connected to the water storage tank.

In some embodiments of the system of the present invention, the rainwater grate is arranged in a brick wall built with cement mortar, and the bottom of the rainwater grate is sequentially arranged from bottom to top as rammed plain soil, crushed stone cushion and concrete foundation.

In some embodiments of the system of the present invention, the distance from the bilge of the annular water storage tank of the rainwater gutter blocking device to the center of the rainwater communication pipe is 240 mm, and the height of the inner bulkhead is 350 mm.

Adopting the above-mentioned technical scheme, the technical effects that the present invention has are as follows:

1. The diversion channel first flows into the sunken green space on both sides of the road for storage, and infiltrates naturally through the penetrating radiant rainwater well in the sunken green space. The natural environment is used to purify the rainwater and at the same time, it plays a role in supplementing the groundwater. The role of green space water storage capacity.

2. When the rain is severe and the rainfall is large, the rainwater flows into the rainwater grate through the rainwater communication pipe on the upper part of the penetrating radiant rainwater well. The function of water can prevent the problem of urban waterlogging caused by the clogging of the rainwater grate by debris. The rainwater is collected by the rainwater pipe at the lower part of the rainwater grate to the nearby rainwater collection well and finally concentrated in the municipal underground water storage tank for utilization.

3. In addition, the bottom of the permeable radiant rainwater well in the sunken green space is equipped with a flushing pipeline for backwashing. The flushing water comes from the buried reservoir that collects rainwater. The flushing water also infiltrates the surrounding natural environment through the system or passes The drainage system is then collected into the reservoir for recycling.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is a general plan schematic diagram of a rainwater recycling system for sponge city construction according to the present invention.

2 is a plan view of a diversion channel of a rainwater recycling system for sponge city construction according to the present invention.

3 is a sectional view of a diversion channel of a rainwater recycling system for sponge city construction according to the present invention.

Fig. 4 is a plan view of the energy dissipation and sedimentation area of a rainwater recycling system for sponge city construction according to the present invention.

5 is a sectional view of a sunken green space of a rainwater recycling system for sponge city construction according to the present invention.

6 is a sectional view of a Jingshi retaining weir of a rainwater recycling system for sponge city construction according to the present invention.

7 is a plan view of a radiant rainwater well of a rainwater recycling system for sponge city construction according to the present invention.

8 is a cross-sectional view of a radiant rainwater well of a rainwater recycling system for sponge city construction according to the present invention.

9 is a plan view of a rainwater grate of a rainwater recycling system for sponge city construction according to the present invention.

10 is a cross-sectional view (A-A) of a rainwater grate of a rainwater recycling system for sponge city construction according to the present invention.

11 is a perspective view of a rainwater grate plugging device of a rainwater recycling system for sponge city construction according to the present invention.

Detailed ways

The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

Aiming at the problems of urban waterlogging caused by the insufficient carrying capacity of the existing urban drainage system and the natural water pollution caused by the direct discharge of rainwater into the natural water system, a rainwater recycling utilization for sponge city construction based on the concept of sponge city construction is proposed. system. The system has good rainwater recycling effect, can effectively reduce the occurrence of urban waterlogging, and has strong natural rainwater purification and recycling capabilities to achieve the effect of "seepage, stagnation, storage, purification, use, and drainage" of rainwater. While solving rainwater disasters, rainwater resources are effectively utilized to play the role of sponge cities.

As shown in FIG. 1, an embodiment of the present invention provides a rainwater recycling system for sponge city construction, which includes a diversion channel 11, a sunken green space 12, a permeable radiation rainwater well 13, a rainwater grate 14, The rainwater outlet blocking device 15, the rainwater communication pipe 16 and the reservoir (not shown in the figure), wherein:

As shown in FIG. 2 and FIG. 3 , there are multiple diversion channels 11 , which are arranged in parallel with each other at certain intervals in the road (roadway 101 + sidewalk 102 ), and are connected to the sunken green space 12 beside the road. A plurality of permeable radiant rainwater wells 13 are arranged in the green space 12 . The number of permeable radiant rainwater wells 13 is consistent with the number of diversion channels 11 and there is a one-to-one correspondence between the two. Through the sunken green space 12 The permeable radiation rainwater well 13 in the infiltration type penetrates the rainwater flowing into the sunken green space 12 to the natural vegetation planted in the sunken green space. The drain pipe 131 is connected to a reservoir, and the reservoir can be directly used as a municipal underground reservoir.

As a result, the rainwater flows into the sunken green space 12 on both sides of the road through the diversion channel 11 for storage, and naturally penetrates through the penetrating radiation rainwater wells 13 in the sunken green space 12. It also plays a role in supplementing groundwater to ensure the water storage capacity of green spaces. In addition, the bottom of the radiant rainwater well 13 in the sunken green space 12 is equipped with a flushing pipeline for backwashing. The flushing water comes from the underground water storage tank that collects rainwater, and the flushing water eventually penetrates into the surrounding natural environment through the system or through the seepage The pipe 131 system is then collected into the buried reservoir, which has the effect of recycling.

Among them, the permeable radiant rainwater well 13 is transformed from the finished radiant rainwater well. As shown in Figures 7 and 8, the diameter of the permeable radiant rainwater well 13 is 620mm. The wellbore 133 of the permeable radiant rainwater well 13 is arranged in the well pit 130 with an inverted trapezoidal cross section. The top of the wellbore 133 is provided with a well grate 134 and a pollution intercepting frame 135. The crushed stone water seepage layer 132 has a crushed stone particle size of 30mm-50mm. The upper part of the well pit 130 of the permeable radiation rainwater well 13 is backfilled with coarse sand 136, and the particle size of the coarse sand is 5mm-10mm. The gravel water permeable layer 132 around the permeable radiant rainwater well 13 is externally wrapped with geotextile, which is separated from the coarse sand 136 used for backfilling the well 130 . The slope of the pit 130 of the permeable radiation rainwater well 13 is 1:0.5, the cross section is trapezoidal, and the depth of the pit 130 is 1550mm. The backwash water supply pipe connected to the bottom of the permeable radiant rainwater well 13 is made of PE pipe with a pipe diameter of DN100. It is connected to the municipal water supply pipeline and supplies water through the municipal underground reservoir.

The top wellhead of the permeable radiant rainwater well 13 is provided with a rainwater communication pipe 16 and is connected to the rainwater grate 14 arranged beside the road through the rainwater communication pipe 16. The bottom of the frame is 150mm.

The inlet of the rainwater grate 14 is provided with a rainwater outlet blocking device 15, and the rainwater inlet sealing device 15 separates an annular water storage tank with an open top at the entrance of the rainwater grate 14. As shown in Figures 9 to 11, the size of the rainwater grate 14 It is 750mm*450mm, and the material is cast iron. A well body 17 is set outside the rainwater grate 14. The well body 17 is made of M10 cement mortar to build a MU10 brick wall, and the well depth is 1200mm. The bottom of the rainwater grate 14 is provided with a water outlet 18, and the water outlet 18 is connected to the municipal underground reservoir through the rainwater pipeline 20. The rainwater pipe 20 is made of HDPE double-wall corrugated pipe, the pipe diameter is DN200, and the slope is 1% when buried.

The storm drain plugging device 15 is made of galvanized steel sheet, and its appearance is shown in Figure 11. It is composed of two layers of rectangular bulkheads. The outer bulkhead 1511 is 680mm*370mm in size and 500mm in height. The outer bulkhead 1511 A ring of ribs 1510 with a size of 750mm*450mm and folded outwards is set on the upper edge. When installing the rainwater grate 14, the ring of ribs 1510 is embedded in the top of the outer well body 17 of the rainwater grate 14, and matched in the ribs 1510 Install cast iron anti-theft grid plate 150. The bottom of the well body 17 of the rainwater grate 14 is sequentially set with rammed plain soil 191, a gravel cushion 192 and a concrete foundation 193 from bottom to top. %, the concrete foundation 193 is poured with C20 concrete with a thickness of 100mm, as shown in Figure 10. The communication port 160 communicating with the rainwater communication pipe 16 is arranged on the outer bulkhead 1511, and the bottom of the rainwater port blocking device 15 is 240 mm away from the center of the rainwater communication pipe.

The size of the inner opening of the inner bulkhead 1512 is 300mm*180mm and the height is 350mm. The upper edge of the inner bulkhead 1512 should be higher than the upper edge of the communication port 160 on the outer bulkhead 1511 connecting the rainwater communication pipe. The bottom of the inner bulkhead 1512 and the bottom of the outer bulkhead 1511 are connected by an annular bottom plate, and an annular water storage tank 151 with an open top is enclosed, which can be used for settlement and water storage. The upper edge of the inner bulkhead 1512 is low on the upper edge of the outer bulkhead 1511. The interior of the inner layer bulkhead 1512 forms a channel that penetrates up and down, and the water outlet 18 connecting the rainwater pipeline is located at the bottom of the rainwater grate 14 below the channel.

When the rain is severe and the rainfall is large, the rainwater flows into the rainwater grate 14 through the rainwater communication pipe 16 on the upper part of the penetrating radiant rainwater well 13. At this time, the rainwater outlet blocking device 15 in the rainwater grate 14 plays a role in preventing debris. The role of initial settlement and a small amount of water storage can prevent the problem of urban waterlogging caused by the rainwater grate 14 being blocked by debris. The rainwater is collected by the rainwater pipe at the lower part of the rainwater grate 15 to the nearby rainwater collection well, and finally concentrated in the municipal underground storage tank for utilization.

Further as shown in Figures 1 to 6, the sunken green space 12 is arranged on the side of the road, the diversion channel 11 runs through both sides of the road (vehicle road + sidewalk), and open curb stones 21 are arranged side by side on both sides of the openings at both ends. One end of the opening of the diversion channel 11 is located outside the roadway, and two parallel open curbs are arranged at the opening, and the lengths are both 1m. The lower part of the diversion channel 11 is poured with a concrete cushion layer 111, which can be poured with C20 concrete with a thickness of 150mm. The concrete cushion 111 needs to have expansion joints every 4-6m, the joint width is 10mm, and the caulking material is asphalt sand. The upper part of the diversion channel 11 is covered with a cover plate, and the cover plate is a C20 prefabricated reinforced concrete cover plate with a thickness of 60mm.

The sunken green space 12 is provided with an energy dissipation and sedimentation area 22 at the entrance of the diversion channel 11. As shown in FIG. 4, the energy dissipation and sedimentation area 22 has a length of 2000mm and a width of 800mm-1000mm. The river pebble 221 is laid in the middle, and the particle size is 30mm-60mm. Around the energy dissipation and sedimentation area 22, there are landscape stones 222, the specifications are 150mm-500mm, and the depth is 300mm.

The height of the top of the slope of the sunken green space 12 is 0.1m lower than that of the sidewalk, and the height of the bottom of the slope is 0.4m lower than that of the sidewalk. The slope of the sunken green space 12 should be less than or equal to 1:5. The width of the grading on both sides of the sunken green space is 1500mm, and the width of the bottom of the slope is 1000mm. In the sunken green space, a stone retaining weir 121 is set every 25m. The size of the landscape stone used in the Jingshi Water Retaining Weir 121 is 150mm-500mm, and the depth of the soil is 300mm, as shown in Figure 6.

The working mode of the rainwater recycling system for sponge city construction of the present invention is as follows: when the rain is relatively fast and the rainfall is large, the rainwater flows into the rainwater grate through the rainwater communication pipe on the upper part of the penetrating radiant rainwater well. The plugging device in the middle of the building plays the role of initial settlement of debris and a small amount of water storage, preventing the problem of urban waterlogging caused by the rainwater grate being blocked by debris. The rainwater is collected by the rainwater pipe at the lower part of the rainwater grate to the nearby rainwater collection well and finally concentrated in the municipal underground water storage tank for utilization. In addition, the bottom of the radiant rainwater well in the sunken green space is equipped with a flushing pipeline for backwashing. The flushing water comes from the underground water storage tank that collects rainwater. The flushing water also infiltrates into the surrounding natural environment through the system or is recycled through the drainage system. Collected in the reservoir, play the effect of recycling.

It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not intended to limit the present invention. The limited conditions that can be implemented have no technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the present invention without affecting the effect and the purpose that the present invention can achieve. It is within the scope that the technical content disclosed in the present invention can cover. At the same time, the terms such as "up", "down", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and clarity, and are not used to limit this specification. The implementable scope of the invention, and the change or adjustment of the relative relationship thereof, shall also be regarded as the implementable scope of the present invention without substantially changing the technical content.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Personnel, within the scope of not departing from the technical solution of the present invention, can make some changes or modifications to equivalent examples of equivalent changes by using the technical content disclosed above. Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solutions of the present invention.

Claims (10)

1. The utility model provides a rainwater cyclic utilization system for sponge city construction, its characterized in that, includes water conservancy diversion passageway, formula of sinking greenery patches, infiltration formula radiation rainwater well, rainwater grate, inlet for stom water plugging device, rainwater communicating pipe and cistern, wherein:

the diversion channel is arranged in a road and is connected into the sunken green land, the penetration type radiation catch basin is arranged in the sunken green land and penetrates inflow rainwater to natural vegetation planted in the sunken green land through the penetration type radiation catch basin, and a seepage and drainage pipe is further arranged at the bottom of the penetration type radiation catch basin and is connected into the reservoir through the seepage and drainage pipe;

the upper portion of penetration type radiation rainwater well is arranged with rainwater communicating pipe and is connected with rainwater grate arranged beside road through rainwater communicating pipe, the inlet of rainwater grate is provided with rainwater inlet plugging device, rainwater inlet plugging device separates out an annular water storage cabin with an open top at the inlet, the outer bulkhead of annular water storage cabin is provided with a communicating port for communicating rainwater communicating pipe, the upper edge of the inner bulkhead of annular water storage cabin is higher than the upper edge of the communicating port, the inner part of inner bulkhead forms a channel which is communicated from top to bottom, the bottom of rainwater grate at the lower part of the channel is provided with a water outlet, and the water outlet is connected into the reservoir through rainwater pipeline.

2. The rainwater recycling system for sponge city construction as claimed in claim 1, wherein: the sunken greenbelt is arranged beside a road, the flow guide channel penetrates through two sides of the road, and two sides of openings at two ends of the flow guide channel are respectively provided with an opening curb in parallel.

3. The rainwater recycling system for sponge city construction as claimed in claim 1, wherein: and a concrete cushion is poured at the lower part of the diversion channel, and expansion joints are arranged at intervals between the concrete cushion.

4. The rainwater recycling system for sponge city construction as claimed in claim 1, wherein: and an energy dissipation and sand settling area is arranged at the opening of the flow guide channel in the sunken green land.

5. The rainwater recycling system for sponge city construction as claimed in claim 1, wherein: the slope of the sunken green land side slope is less than or equal to 1:5, and the height of the top of the sunken green land slope is lower than that of the road surface.

6. The rainwater recycling system for sponge city construction as claimed in claim 1, wherein: the rainwater communicating pipe is arranged on the upper portion of the wellhead sewage intercepting frame of the penetration type radiation rainwater well, and the pipe center of the rainwater communicating pipe is 150mm away from the bottom of the wellhead sewage intercepting frame.

7. The rainwater recycling system for sponge city construction as claimed in claim 1, wherein: the lower part of the penetration type radiation catch basin is provided with a hole to form a penetration area, the outside of the penetration area is wrapped with a gravel seepage layer, and coarse sand is backfilled in a pit at the upper part of the penetration type radiation catch basin.

8. The rainwater recycling system for sponge city construction as claimed in claim 1, wherein: the bottom of the penetration type radiation catch basin is connected with a backwashing water supply pipeline, and the backwashing water supply pipeline is connected to the water storage tank.

9. The rainwater recycling system for sponge city construction as claimed in claim 1, wherein: the rainwater grate is arranged in a brick wall built by cement mortar, and the bottom of the rainwater grate is sequentially provided with rammed plain soil, a broken stone cushion layer and a concrete foundation from bottom to top.

10. The rainwater recycling system for sponge city construction as claimed in claim 1, wherein: the distance between the bottom of the annular water storage cabin of the gutter inlet plugging device and the center of the rainwater communicating pipe is 240mm, and the height of the inner cabin wall is 350 mm.

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