CN105350630B - A rapid infiltration and reuse technology of urban rainwater - Google Patents

Abstract

The invention relates to a technology for rapid infiltration and reuse of urban rainwater, and belongs to the technical field of rapid infiltration and reuse of urban rainwater. The present invention first digs a water seepage area, then uses cement mortar to build brick walls on both sides, casts concrete at the bottom of the water seepage area, then inserts wooden piles into the bottom concrete, and then fills the bottom with coarse sand and power plant treatment Fill it with the residue until it is flush with the stake; then lay a layer of film on the surface, and lay straw and sludge at the same time, sprinkle pebbles evenly in the sludge, and after natural air drying, lay water seepage bricks on the surface, Fill the remaining part of the seepage area with river sludge until it is full. After the filling is completed, plants can be planted on the surface of the treated filling area. Beneficial effects of the present invention: the present invention can quickly infiltrate rainwater, and at the same time, when there is no rainwater, the groundwater evaporates to supply plant growth; the operation steps are simple and the required cost is low.

Description

A rapid infiltration and reuse technology of urban rainwater

technical field

The invention relates to a technology for rapid infiltration and reuse of urban rainwater, and belongs to the technical field of rapid infiltration and reuse of urban rainwater.

Background technique

Due to the obstruction of rainfall infiltration, the balance of urban hydrology and ecology is out of balance, and the formation speed and peak value of rainfall runoff in urban areas are much higher than those in non-urbanized areas, which increases the operating load of urban drainage systems, leading to increasingly prominent problems of urban flood disasters; a large amount of rainwater resources are lost , groundwater sources cannot be effectively conserved, causing geological disasters such as urban ground subsidence, and the urban heat island effect is also becoming more and more serious; a large amount of pollutants carried by rainfall runoff flow into urban rivers and lakes through the urban drainage system, becoming urban rivers and lakes. It is one of the important factors of eutrophication and poses a threat to the ecological health of urban rivers and lakes. In this context, relying solely on the construction of urban rainwater pipe networks and storage tanks to solve problems such as urban flood control and stormwater runoff pollution will consume a lot of urban space resources and engineering construction operating costs, and will be affected by urban space, urban development, etc. Restricted by many conditions, the ground permeable pavement is due to its role in reducing urban flood control and drainage pressure, reducing runoff and pollutant discharge, regulating the temperature and humidity of urban space, improving the local ecological environment and the living environment of soil microorganisms, etc. Significant effect has been increasingly concerned or accepted by people.

Contents of the invention

The technical problem mainly solved by the present invention: Aiming at the great waste of water resources after the infiltration of rainwater at present, and the rainwater that cannot be infiltrated will cause traffic jams, a rapid infiltration and reuse of urban rainwater is provided method, the method is mainly to change the underground mud, through the addition of different sludge and other materials, to increase the infiltration of rainwater. .

In order to solve the above technical problems, the technical scheme adopted in the present invention:

(1) After digging a seepage area with a length of 10-15m, a width of 5-6m, and a height of 1.2-1.5m in the greening area of the highway, use cement mortar to build brick walls on both sides with a thickness of 1-2cm to make it solidify 3～4h;

(2) After it is solidified, pour concrete at the bottom of the seepage area with a thickness of 3 to 4 cm and solidify for 15 to 25 minutes to make it semi-solidified, and then insert a wooden pile with a radius of 5 cm and a height of 50 cm into the concrete. In the concrete at the bottom, insert 3 to 4 per square meter, and use cement mortar to firmly hold the wooden piles;

(3) After the concrete pouring column is firmly fixed, fill the bottom with coarse sand, the thickness of which is 30-40cm, the main component of the coarse sand is stone, and the mass ratio of sand and soil is 4:2:1 mixed and then filled with residue from the power plant until it is flush with the stake;

(4) After the above filling is completed, lay a layer of film with a thickness of 0.8-1 mm on the surface, and lay 2-3 cm of straw at the same time, and lay 10-15 cm of sludge from the secondary sedimentation tank of the sewage treatment plant above the straw. Evenly sprinkle pebbles with a particle size of 1-2cm in the sludge, the amount of which is 1-2kg per square meter, and let it dry naturally for 1-2 hours;

(5) After it is naturally air-dried, lay 2-3 cm thick seepage bricks on its surface, and lay 2-3 layers so that each seepage brick is closely connected. The raw materials of the seepage bricks are cement, sand, slag, Fly ash is formed by mixing under high pressure at a mass ratio of 1:1:1:1;

(6) After the laying of seepage bricks is completed, fill the remaining part of the seepage area with river sludge until it is full. After the filling is completed, plants can be planted on the surface of the treated filling area.

The beneficial effects of the present invention are:

(1) The present invention can quickly infiltrate rainwater, and at the same time, when there is no rainwater, the groundwater evaporates to supply plant growth; (2) The operation steps are simple and the required cost is low.

detailed description

First, dig a 10-15m long, 5-6m wide, and 1.2-1.5m high water seepage area in the road greening area, and then use cement mortar to build brick walls on both sides with a thickness of 1-2cm and make it solidify for 3-3 4h; after it is solidified, pour concrete at the bottom of the seepage area with a thickness of 3-4cm and solidify for 15-25min to make it semi-solidified, and then insert a wooden pile with a radius of 5cm and a height of 50cm into the bottom In the concrete, insert 3 to 4 per square meter, and use cement mortar to secure the wooden piles; after the above-mentioned concrete pouring columns are firmly fixed, then fill the bottom with coarse sand, and the thickness of the filling is 30-40cm. The main component of coarse sand is stone, and sand and soil are mixed according to the mass ratio of 4:2:1, and then filled with the residue treated by the power plant until it is flush with the wooden pile; after the above filling is completed, the Lay a layer of film with a thickness of 0.8-1mm on the surface, and lay 2-3cm of straw at the same time, and lay 10-15cm of sludge from the secondary sedimentation tank of the sewage treatment plant on the top of the straw, and sprinkle the sludge evenly into the particle size The pebbles are 1-2cm in size, and the amount of sprinkling is 1-2kg per square meter, and let it dry naturally for 1-2 hours; layer, so that each seepage brick is closely connected. The raw material of the seepage brick is cement, sand, slag, and fly ash mixed with high pressure at a mass ratio of 1:1:1:1; after the seepage brick is laid, the seepage Fill the remaining part of the area with river sludge until it is full. After the filling is completed, plants can be planted on the surface of the treated filling area.

Example 1

First, dig a 15m long, 6m wide, and 1.5m high seepage area in the road greening area, and use cement mortar to build brick walls on both sides of it, with a thickness of 2cm, and let it solidify for 4 hours; The poured concrete at the bottom is 4cm thick and solidified for 25 minutes to make it semi-solidified. Then, insert 5cm-radius and 50cm-high wooden piles into the bottom concrete, insert 4 per square meter, and use cement mortar to It fixes the stake firmly; when the above-mentioned concrete pouring column is fixed, then fill the bottom with coarse sand, the thickness of the filling is 40cm, and the main component of the coarse sand is stone, and the mass ratio of sand and soil is 4:2: 1, and then fill it with the residue treated by the power plant until it is flush with the wooden pile; after the above filling is completed, lay a layer of film with a thickness of 1mm on its surface, and lay 3cm of straw at the same time, And lay 15cm of sludge from the secondary sedimentation tank of the sewage treatment plant on the top of the straw, and evenly sprinkle pebbles with a particle size of 2cm in the sludge, the amount of which is 2kg per square meter, and let it dry naturally for 2 hours; After air-drying, pave the seepage brick that thickness is 3cm on its surface, lay 3 layers, make every seepage brick closely connect, described seepage brick raw material is cement, sand, slag, fly ash by mass ratio 1:1: 1:1 mixed high pressure is formed; after the seepage brick is laid, fill the remaining part of the seepage area with river sludge to fullness, and after the filling is completed, plants can be planted on the surface of the treated filling area. The invention can quickly infiltrate rainwater, and at the same time, when there is no rainwater, groundwater evaporates to supply plants for growth.

Example 2

Firstly, dig a 10m long, 5m wide, and 1.2m high seepage area in the road greening area, and use cement mortar to build brick walls on both sides of it, with a thickness of 1cm, and let it solidify for 3 hours; The concrete at the bottom is poured with a thickness of 3cm and solidified for 15 minutes to make it semi-solidified, and then insert 5cm-radius and 50cm-high wooden piles into the bottom concrete, insert 4 per square meter, and use cement mortar to place It firmly holds the wooden pile; when the above-mentioned concrete pouring column is firmly held, then fill the bottom with coarse sand, and the thickness of the filling is 30cm. The main component of the coarse sand is stone, and the mass ratio of sand and soil is 4:2: 1, and then fill it with the residue treated by the power plant until it is flush with the wooden pile; after the above filling is completed, lay a layer of film with a thickness of 0.8mm on its surface, and lay 2cm of straw at the same time , and lay 10cm of sludge from the secondary sedimentation tank of the sewage treatment plant on the top of the straw, and evenly sprinkle pebbles with a particle size of 1cm in the sludge, and the amount of sprinkled is 1kg per square meter, and let it dry naturally for 1h; After natural air-drying, pave water seepage bricks with a thickness of 2cm on the surface, and lay 2 layers so that each water seepage brick is closely connected. The raw materials of the water seepage bricks are cement, sand, slag, and fly ash in a mass ratio of 1:1 : 1:1 mixed high-pressure formation; after the seepage bricks are laid, fill the remaining part of the seepage area with river sludge to the full, and after the filling is completed, plant plants on the surface of the treated filling area. The invention can quickly infiltrate rainwater, and at the same time, when there is no rainwater, groundwater evaporates to supply plants for growth.

Example 3

Firstly, dig a 12m long, 5m wide, and 1.3m high seepage area in the road greening area, and use cement mortar to build brick walls on both sides of it, with a thickness of 1cm, and let it solidify for 3 hours; The cast-in-place concrete at the bottom is poured with a thickness of 3cm and solidified for 15 minutes to make it semi-solidified. Then insert 5cm-radius and 50cm-high wooden piles into the bottom concrete, insert 4 per square meter, and use cement mortar to It firmly holds the wooden pile; when the above-mentioned concrete pouring column is firmly held, then fill the bottom with coarse sand, and the thickness of the filling is 30cm. The main component of the coarse sand is stone, and the mass ratio of sand and soil is 4:2: 1, and then fill it with the residue treated by the power plant until it is flush with the wooden pile; Straw, and lay 12cm of sludge from the secondary sedimentation tank of the sewage treatment plant on the top of the straw, and evenly sprinkle pebbles with a particle size of 2cm in the sludge, the amount of sprinkled is 1kg per square meter, and let it dry naturally for 1 to 2 hours ; After it is naturally air-dried, pave the seepage brick with a thickness of 3cm on its surface, and lay 3 layers so that every seepage brick is closely connected. The raw material of the seepage brick is cement, sand, slag, fly ash according to the mass ratio 1:1:1:1 mixed high pressure is formed; after the seepage bricks are laid, the remaining part of the seepage area is filled with river sludge to fullness, and after the filling is completed, plants can be planted on the surface of the treated filling area. The invention can quickly infiltrate rainwater, and at the same time, when there is no rainwater, groundwater evaporates to supply plants for growth.

Claims (1)

1. oozed under a kind of urban rainwater is quick and reuse method, it is characterised in that concrete operation step is：

(1) a 10~15m long is dug in highway planting area, behind the infiltration area of 5~6m wide, 1.2~1.5m high, is utilized in its both sides Masonry of cement mortar brick wall, thickness is 1~2cm, makes 3~4h of its solidification；

(2) after after its solidification, in infiltration area bottom cast-in-place concrete, the thickness of pouring is 3~4cm, solidifies 15~25min, is made It is in half curdled appearance, then is 5cm by radius, and the timber of a height of 50cm inserted into lower concrete, and every square metre of insertion 3~ 4, it is firmly lived into timber using cement mortar；

(3) treat that above-mentioned concrete casting post is firmly lived, then to its underfill coarse sand granule, the thickness of filling is 30~40cm, The main component of described coarse sand granule is stone, sand and soil in mass ratio 4:2:1 mixes, then again to its filling hair Residue after power plant's treatment, filling with timber until flush；

(4) treat after the completion of above-mentioned filling, the film that a layer thickness is 0.8~1mm is laid on its surface, and lay 2~3cm simultaneously Straw, and above straw lay 10~15cm secondary sedimentation tank of sewage treatment work sludge, be uniformly sprinkled into particle diameter in sludge It is the cobblestone of 1~2cm, the amount being sprinkled into is every square metre of 1~2kg, makes 1~2h of its natural air drying；

(5) after after its natural air drying, in the seepage brick that its surface laying depth is 2~3cm, 2~3 layers are laid, makes every piece of infiltration Brick close proximity, described seepage brick raw material are cement, sand, slag, flyash in mass ratio 1:1:1:1 mixed high-voltage shape Into；

(6) treat after the completion of seepage brick laying, infiltration area's remainder river sludge is filled with to full, completion to be filled Afterwards, fill area surface grafting plant after treatment.