Vertical barrier structure and method of prefabricated assembled bentonite material for underground pollution control

Abstract

The invention discloses a prefabricated assembled bentonite material vertical barrier structure and method for underground pollution control. It includes at least one prefabricated barrier wall, a trench is opened between the polluted aquifer and the unpolluted aquifer, the trench extends into the aquifer, the prefabricated barrier wall is placed in the trench and the lower part is embedded in the In the water-resistant layer, there are ring male and female joints at both ends of a single prefabricated partition wall, and multiple prefabricated partition walls are connected by ring male and female joints to form a continuous vertical partition wall. The gap between the joints is filled and sealed with joint sealing material; the top of the groove is provided with a guide wall. The invention has the advantages of extremely low permeability, enhanced wall rigidity and thickness, high chemical compatibility, reliable wall joints, fast construction, etc., and is suitable for working conditions with high requirements for pollution prevention and control.

Description

technical field [0001] The invention relates to a method for preventing and controlling the risk of soil and underground water and soil pollution, and in particular to a prefabricated bentonite material vertical barrier structure and method for underground pollution control. Background technique [0002] my country's rapid economic development has caused serious soil and groundwater pollution. Urban solid waste and other waste centralized disposal sites (especially tens of thousands of simple urban solid waste landfills or storage yards that do not meet the standards) generally have the problem of underground pollution, including the sites left after the relocation of industrial enterprises and industrial solid waste (Tailing ponds, phosphogypsum, steel slag, etc.) landfills, the content of heavy metals and organic pollutants significantly exceeds the standard, and urgently need to be repaired. The vertical anti-pollution barrier wall is the main technical means to effectiv...

AI Technical Summary

Problems solved by technology

However, when the traditional GCL is used for vertical barrier in the form of lap joint between webs, the lateral pressure (tens of kPa) it receives is much smaller than the vertical pressure caused by the solid waste above when it is used at the bottom of the landfill, so the lap joint Leakage is difficult to control, which is the weak point of failure; at the same time, the thickness of traditional GCL bentonite is less than 1cm, and the ability to control the diffusion of pollutants when used alone as the main material of vertical barrier structures is relatively weak

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