Intercepting device for groundwater pollution control

Abstract

The invention discloses an intercepting device for underground water pollution control. The intercepting device is provided with a strip-shaped underground ditch body; a longitudinal water and gas collecting well is arranged at the tail end of one side of the ditch body and is perpendicular to the ditch body; a high-permeability layer is arranged in the ditch body; a sealing layer is arranged at the top of the high-permeability layer; a water collecting pipe extending in the length direction of the ditch body is arranged in the middle of the lower portion, close to the ditch bottom, of the high-permeability layer, and one end of the water collecting pipe communicates with the water and gas collecting well; and a gas collecting pipe extending in the length direction of the ditch body is arranged in the middle of the upper portion, close to the sealing layer, of the high-permeability layer and above the water collecting pipe, and one end of the gas collecting pipe communicates with the water and gas collecting well. The intercepting device for groundwater pollution control can quickly and effectively intercept migration of groundwater pollution plume and synchronously repair groundwater pollution of soil in an upstream target area of the intercepting device.

Description

technical field [0001] The invention relates to a device used in the field of groundwater pollution risk control and restoration, in particular to an intercepting device for rapidly controlling groundwater pollution. Background technique [0002] Groundwater accounts for 1 / 3 of my country's total water resources, and about 20% of the total water supply comes from groundwater. In recent years, with the intensification of industrial production activities, excessive use of pesticides and fertilizers, and the aging and leakage of chemical production and storage facilities, the situation of groundwater pollution in my country has become more serious. [0003] The groundwater interception ditch is an underground engineering facility used to quickly intercept and collect polluted groundwater. Its operation can significantly increase the collection rate of polluted groundwater in low-permeability formations and effectively intercept the migration of upstream groundwater pollution pl...

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Problems solved by technology

[0005] However, the existing groundwater pollution interception channels are usually only equipped with a single-pump liquid-phase extraction system, which passively collects polluted groundwater by means of single-phase liquid-phase extraction during operation, although it has a certain interception effect on the groundwater pollution plume upstream of the ditch body , but the interception efficiency is generally not high

And usually in order to achieve a better groundwater interception efficiency, the design depth of the existing interception ditch is generally deeper to increase the hydraulic gradient of the upstream groundwater flowing into the ditch, but this is not conducive to the control of underground light non-aqueous liquid pollution

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