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Pollution site remediation obstructing method under non-excavating manner

A site restoration and non-excavation technology, which is applied in the field of contaminated site restoration and soil treatment, can solve the problems of vertical migration barrier, difficulty in ensuring anti-seepage effect, secondary pollution, etc., and achieve the effect of preventing vertical infiltration and horizontal diffusion

Inactive Publication Date: 2019-01-11
NANJING GW ENVIRONMENT ENG
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is how to overcome the cumbersome construction caused by the excavation, the vertical migration barrier, the difficulty in ensuring the anti-seepage effect and the secondary pollution during the excavation process

Method used

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  • Pollution site remediation obstructing method under non-excavating manner
  • Pollution site remediation obstructing method under non-excavating manner
  • Pollution site remediation obstructing method under non-excavating manner

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Experimental program
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Embodiment 1

[0023] First, the mixed slurry is prepared according to the mass ratio of cement slurry: bentonite: calcium chloride 80-89:10-19:1. Then use a drilling machine to drill holes at the boundary or outside the boundary of the contaminated site, and the drilling depth should be controlled in the silty clay layer. The silt mentioned here refers to the cohesive soil layer with a natural void ratio of 1.0~1.5 and a permeability coefficient of 10-5~10-8cm / s. The drilling depth should be drilled into the silty clay layer, and at the same time, the silty clay layer cannot be drilled through. The drilling depth should be properly controlled, just in the silty clay layer.

[0024] Then, using the construction technology of high-pressure jet triple pipe water-stop curtain piles, water-stop curtains are set up around the polluted area. Insert the grouting pipe into the well hole, spray high-pressure water flow, compressed air and low-pressure grout during the rotation and lifting process, a...

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Abstract

The invention belongs to the field of soil treatment, especially to the field of pollution site remediation and more specifically relates to a pollution site remediation obstructing method under a non-excavating manner. According to the pollution site remediation obstructing method under the non-excavating manner, one mucky clay layer in soil is taken as a bottom obstructing layer, by means of themanner that vertical obstructing walls deep into the mucky clay layer are constructed, a pollution site obstructing space with a horizontal obstructing layer and a vertical obstructing layer is formed; and by means of the manners that the mucky clay layer is utilized as the horizontal obstructing layer, and the vertical obstructing walls are established on the periphery of the mucky clay layer, under the precondition of non-excavating and on the basis of a construction project water stopping curtain process, the natural low-permeability mucky clay layer is utilized, obstructing between the periphery and the bottom of a pollution area can be economically and effectively realized, pollutants are effectively intercepted, and the pollutants are prevented from vertical infiltration and horizontal diffusion along with groundwater.

Description

technical field [0001] The invention belongs to the field of soil treatment, especially the field of contaminated site restoration, and more specifically relates to a barrier method for non-excavation polluted site restoration. Background technique [0002] Groundwater is an important part of water resources, and it is also an important source of water supply in northern China and many cities. The rational development and utilization of groundwater plays a very important role in my country's social and economic development and ecological environment construction. In recent decades, with the continuous development of my country's economy and society, groundwater has become more and more polluted. According to surveys, the area of ​​groundwater pollution is gradually increasing and the degree of pollution is gradually deepening. As a unified whole, soil and groundwater, ground pollutants or polluted soil seep into the ground with atmospheric precipitation and then pollute grou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00E02D19/18
CPCE02D3/00E02D19/18
Inventor 韩正昌马军军卜旭凌朱家明吴传宝陶志慧
Owner NANJING GW ENVIRONMENT ENG
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