CN204849995U - Municipal administration road drainage system - Google Patents

Abstract

The utility model provides a municipal administration road drainage system, the rainwater some along the road the face converge to the town road inlet for stom water and get into municipal rainwater pipeline, trompil that another part was seted up on through car lane both sides road tooth flows in in the greenbelt between car lane and the non -motor way, get into rainwater unnecessary rainwater after greenbelt filtration, purification and infiltration in the greenbelt and flow into the permeate tube who oozes row pipe -line system and carry out the infiltration in order replenishing groundwater, when the rainwater of the big and too late quick infiltration of rainfall intensity then through the overflow bank of tubes that oozes row pipe -line system to lay with the car lane under municipal rainwater pipeline, direct through the town road inlet for stom water get into municipal rainwater pipeline the rainwater and through oozing the rainwater that row pipe -line system overflow got into municipal pipeline, enter near water through municipal rainwater pipeline jointly. The utility model discloses utilize the greenbelt and ooze row pipe -line system the drainage can, can play and purify the precontamination rainwater, delay peak flow discharge, subduct urban waterlogging and supply the effect of aspects such as groundwater.

Description

A Municipal Road Drainage System

technical field

The utility model relates to the technical field of urban drainage and waterlogging prevention engineering, in particular to a municipal road drainage system combining LID technology (low impact development technology), GSI (green infrastructure) and traditional municipal drainage system.

Background technique

With the acceleration of urbanization, the area of built-up areas continues to expand, resulting in a substantial increase in impermeable areas, resulting in an increase in the runoff coefficient, an earlier flood peak, and an increase in flood volume under the same rainfall conditions, which pose a huge threat to urban drainage and waterlogging prevention and river flood discharge. The pressure also threatens the safety of the city.

In view of the rapid development and construction of the city, the traditional road drainage technology only discharges rainwater through the rainwater outlet, and the drainage capacity of the pipeline is increasingly insufficient, which leads to a series of urban waterlogging phenomena, and then the municipal management department adopts the standard of increasing the size of the drainage pipeline, adding new The number of drainage pipes and drainage channels, as well as new drainage pumping stations and other countermeasures to solve the problem, while costing a lot of economic costs, the response effect is not very obvious.

Aiming at the problem of waterlogging and waterlogging in modern cities, municipal management departments have been unable to effectively solve the problem by adopting measures such as increasing the size standard of drainage pipes, increasing the number of drainage pipes and drainage channels, and building new drainage pumping stations. The development needs of building a sponge city are contrary to each other.

Utility model content

The technical problem to be solved by the utility model is to provide a municipal road drainage system, which can purify initial polluted rainwater, delay flood peak flow, reduce urban waterlogging and supplement groundwater.

In order to solve the above-mentioned technical problems, the technical solution of the present utility model is: a municipal road drainage system, including a municipal rainwater pipeline collection system, which includes municipal rainwater pipelines laid under both sides of the motorway;

Municipal road drainage system also includes green land purification infiltration system and seepage drainage pipeline system,

The green space purification and infiltration system includes a green isolation belt between the motor vehicle lane and a non-motor vehicle lane, a curb between the motor vehicle lane and the green isolation belt, and an opening on the curb. The belt elevation is lower than motor vehicle lanes and non-motor vehicle lanes, and rainwater can flow into the green belt through the openings on the curb;

The seepage drainage pipeline system includes a water collection infiltration well, a permeation pipe, a permeation overflow well and an overflow pipe. The laying elevation of the permeation pipe and the overflow pipe is located below the ground of the green isolation belt, and the rainwater in the permeation pipe seeps down through the water filtration and purification layer. To replenish groundwater, the rainwater in the green isolation belt can infiltrate into the water collection infiltration well, the water collection infiltration well is connected to the permeation pipe, the permeation pipe is connected to the infiltration overflow well, and the rainwater in the infiltration overflow well that is too late to infiltrate passes through the overflow manifold into the municipal rainwater pipe.

The utility model is based on the road drainage design of the combined mode of "LID (Low Impact Development) + GSI (Green Infrastructure) + traditional technology";

Introduce LID technology to give full play to the filtering and purification functions of the green isolation belt. Taking the two indicators of COD and SS in the rainwater of municipal roads as an example, the pollution indicators of rainwater after filtering and purification by the green isolation belt are greatly reduced. Take this indicator as an example, the COD of the initial rain runoff in Guangzhou is 373mg/L, and the SS is 439mg/L. The COD index value is about 1/4 of the initial runoff, and the SS index value is about 1/10 of the initial runoff, which is very beneficial to the ecological benefits of the environment;

Introduce GSI technology, set up flat grate rainwater outlet and seepage drainage pipe system in the green isolation belt, the elevation of the flat grate rainwater outlet is 50mm higher than the road surface of the green belt, the purpose of the height difference design is to filter and purify the initial rainwater through the green space system and infiltration, so as not to quickly pass through the flat-nose rainwater outlet and flow into the infiltration rainwater pipe in the green belt for infiltration.

The drainage system greatly prolongs the time of rainwater runoff on the pavement, reduces surface runoff, enhances rainwater infiltration and groundwater recharge, and at the same time delays the formation time of flood peak runoff, reduces flood peak flow, reduces the flood control pressure of the rainwater pipeline system, and improves the flood control standard of the design area. Reduce flood disasters. The standard for pipelines to deal with rainfall intensity can be increased from the traditional process design (3-5 year rainfall intensity) to the 7-8 year rainfall renewal period, and the economic benefits brought are very significant.

As an improvement, the elevation of the green isolation belt is 0.15-0.25m lower than the motor vehicle lanes and non-motor vehicle lanes.

As an improvement, the curbs are provided with openings every 8-12 meters.

As an improvement, the buried depth of the municipal rainwater pipe is below 2.5m, which is lower than the laying elevation of the seepage and drainage pipe system as a whole.

As an improvement, the laying elevation of permeation pipe and overflow pipe is 1.5-2.0m below the ground of the green belt.

As an improvement, the water filtration and purification layer is a water filtration geotextile arranged around the seepage pipe, and the water filtration geotextile wraps a φ15-φ25 gravel gradation layer.

As an improvement, the thickness of the gravel gradation layer is 150-200mm.

As an improvement, a sewage intercepting frame is provided under the grate of the water-collecting infiltration well.

The beneficial effects brought by the utility model compared with the prior art are:

Give full play to the filtration, purification and diversion functions of the green isolation belt, the drainage system greatly prolongs the runoff time of road surface rainwater, reduces surface runoff, enhances rainwater infiltration and groundwater recharge, delays the formation time of flood peak runoff, reduces flood peak flow, and reduces The flood control pressure of the rainwater pipeline system improves the flood control standard of the design area and reduces flood disasters.

Description of drawings

Figure 1 is a flow chart of the drainage method.

Figure 2 is an elevation view of the drainage system.

Figure 3 is a plan view of the drainage system.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

A municipal road drainage system comprises a municipal rainwater pipeline collection system, a green land purification infiltration system and a seepage drainage pipeline system. Overall, it is a road drainage design based on the combined model of "LID (Low Impact Development) + GSI (Green Infrastructure) + traditional technology".

As shown in Figures 2 and 3, the municipal rainwater pipeline collection system is a traditional drainage facility, which includes traditional municipal rainwater pipelines 3 laid under both sides of the motorway, rainwater inspection wells and traditional flat grate rainwater outlets 4, and traditional municipal rainwater pipelines 3 The burial depth is controlled below 2.5m, and the overall elevation is lower than the laying elevation of the seepage and drainage pipeline system. The purpose is to receive rainwater from the rainwater inlet of the traditional municipal road and also receive the rainwater discharged from the seepage and drainage pipeline system.

As shown in Figures 2 and 3, the green space purification infiltration system includes a green isolation belt 2 between the motor vehicle lane and a non-motor vehicle lane, a curb located between the motor vehicle lane and the green isolation belt 2, and a The opening in the tooth 1. The green isolation belt 2 is 0.15-0.25m lower than the motor vehicle lane and the non-motor vehicle lane in elevation, and the curb is provided with openings 1 every 8-12 meters, and rainwater can flow into the green isolation belt 2 through the openings on the curb.

As shown in Figures 2 and 3, the seepage drainage pipeline system consists of four parts: the water collection seepage well 9, the seepage pipe 10, the seepage overflow well 11 and the overflow pipe 5. The laying elevation of the seepage pipe 10 and the overflow pipe 5 is located in the green The isolation zone 2 is 1.5-2.0m below the ground, and the pipe diameter generally adopts DN200. The rainwater infiltration pipe 10 is surrounded by a φ15-φ25 gravel gradation layer 7 wrapped with filter geotextile 6 to assist infiltration to increase infiltration. The thickness of the gravel gradation layer 7 is generally 150-200 mm. The initial rainwater is preferentially stored, filtered and purified in the green isolation belt 2, most of the impurities are intercepted and purified by the green belt, and a small amount of suspended matter enters the water collection infiltration well 9 with the water flow. There is a sewage interception frame under the 9 grates of the water collection and infiltration well, which can further trap fine impurities and enter the seepage drainage pipeline system. However, after a period of time, the sewage interception frame will be blocked by the accumulation of dirt, so it is necessary to regularly clean the interception frame after the rainy season Dirty frame for cleaning.

As shown in Figure 1, the drainage method of the present utility model

Step 1: Part of the heavily polluted initial rainwater flows along the road surface to the traditional municipal road rainwater outlet and enters the traditional municipal rainwater pipeline 3; the other part smoothly flows into the green isolation belt 2 along the side stone of the opening;

Step 2: After the rainwater entering the green belt 2 is filtered, purified and infiltrated by the green belt, the excess rainwater flows into the infiltration pipeline system to infiltrate to replenish groundwater. The overflow pipe 5 is discharged to the traditional municipal rainwater pipeline 3 under the laying and motorway;

Step 3: The rainwater that directly enters the traditional municipal rainwater pipe 3 through the municipal road stormwater outlet and the rainwater that overflows into the traditional municipal pipe through the seepage drainage pipe system are jointly discharged into the nearby water body through the traditional municipal rainwater pipe 3 .

Part of the heavily polluted initial rainwater flows along the road surface to the traditional municipal road rainwater outlet and enters the traditional municipal rainwater pipeline 3; the other part flows smoothly into the green isolation belt 2 along the side stones of the opening, and the green isolation belt 2 on both sides is in the elevation design 0.2m below the municipal road surface, the excess rainwater after filtering, purifying and infiltrating through the green belt flows into the infiltration pipeline system to infiltrate to replenish groundwater, and the rainwater that cannot infiltrate quickly due to the heavy rainfall intensity is discharged through the overflow pipe 5 To the traditional municipal rainwater pipeline 3 laid under the motorway. This process system gives full play to the filtration and purification function of the green isolation belt 2. Taking the two indicators of COD and SS in the municipal road rainwater as an example, the COD of the initial rain runoff on the road in Guangzhou is 373mg/L, and the SS is 439mg/L. The COD of the rainwater flowing into the infiltration pipeline system after filtration and purification in the green isolation belt 2 is 80-100 mg/L, and the SS is 30-50 mg/L. The COD index value is about 1/4 of the initial runoff, and the SS index value is 1/4 of the initial runoff About 1/10, its ecological benefits to the environment are very beneficial; at the same time, the process system greatly prolongs the runoff time of road surface rainwater, reduces the surface runoff, enhances rainwater infiltration and groundwater recharge, and delays the formation time of flood peak runoff , reducing the flood peak flow, reducing the flood control pressure of the rainwater pipeline system, improving the flood control standard of the design area, and reducing flood disasters. The standard for pipelines to deal with rainfall intensity can be improved from the traditional process design (3-5 year rainfall intensity) to the 7-8 year rainfall renewal period, the economic benefits brought are very significant, and it is a suitable for my country's construction. Economically viable technologies for sponge city development needs.

After using the road drainage design technology based on the combination mode of "LID+GSI+traditional technology" for engineering design, its ecological benefits, economic benefits and pipeline drainage capacity have the following advantages compared with the traditional road drainage design technology:

Claims (8)

1. a town road drainage system, comprises municipal storm sewer gathering system, it municipal storm sewer laid under comprising motorway both sides;

It is characterized in that: town road drainage system also comprises greenery patches and purifies system of infiltrating and ooze draining pipeline system,

The described greenery patches purification system of infiltrating comprises the perforate be located at greenbelt between motorway and nonmotorized vehicle lane, be located at the road curb between motorway and greenbelt and be located in road curb, lower than motorway and nonmotorized vehicle lane on described greenbelt elevation, rainwater flows into greenbelt by the perforate in road curb;

The described draining pipeline system that oozes comprises catchment infiltration well, osmos tube, infiltration overflow well and bleed off pipe, the elevation that lays of osmos tube and bleed off pipe is positioned at greenbelt below ground, in osmos tube, rainwater is by oozing recharge of groundwater under drainage purifying layer, rainwater in greenbelt can ooze down to catchment infiltration well, catchment infiltration well is communicated with osmos tube, osmos tube is communicated with infiltration overflow well, and the rainwater having little time down to ooze in infiltration overflow well imports municipal storm sewer by bleed off pipe.

2. a kind of town road drainage system according to claim 1, is characterized in that: lower than motorway and nonmotorized vehicle lane 0.15-0.25m on greenbelt elevation.

3. a kind of town road drainage system according to claim 1, is characterized in that: road curb arranges perforate every 8-12 rice.

4. a kind of town road drainage system according to claim 1, is characterized in that: the buried depth of described municipal rain pipe is at below 2.5m, and entirety will lay elevation lower than what ooze draining pipeline system.

5. a kind of town road drainage system according to claim 1, is characterized in that: the elevation that lays of osmos tube and bleed off pipe is positioned at greenbelt below ground 1.5-2.0m.

6. a kind of town road drainage system according to claim 1, is characterized in that: described drainage purifying layer is the drainage geotextiles being located at soakaway trench periphery, drainage geotextiles parcel φ 15-φ 25 gravel grating layer.

7. a kind of town road drainage system according to claim 6, is characterized in that: gravel grating layer thickness is 150-200mm.

8. a kind of town road drainage system according to claim 1, is characterized in that: the grate of described catchment infiltration well has and cuts dirty frame.