GCL vertical anti-seepage wall and preparation method thereof

Abstract

The invention discloses a GCL vertical anti-seepage wall and a preparation method thereof. The GCL vertical anti-seepage wall comprises a vertical anti-seepage wall body, wherein a sodium-based geosynthetic clay liner is fixed at the outer side of the vertical anti-seepage wall body, and the sodium-based geosynthetic clay liner comprises a vertical anti-seepage structure and a top fixation structure. The anti-seepage wall disclosed by the invention has a low permeability coefficient, and is good in bonding with a soil mass, and high in anti-seepage effect.

Description

technical field [0001] The invention relates to the anti-seepage field, in particular to a GCL vertical anti-seepage wall and a preparation method thereof. Background technique [0002] There are hidden dangers of leakage in dams and garbage dumps, which seriously affect people's safety and living environment. With the enhancement of environmental protection awareness, people have more and more researches on anti-seepage, especially the anti-seepage of garbage dumps. Early domestic construction Many simple landfills, most of these old landfills are dumped directly in low-lying areas without any anti-seepage treatment, and the pollutants spread directly to the surroundings, thereby polluting the soil and groundwater. For anti-seepage, horizontal anti-seepage was mainly done before, but vertical anti-seepage is also a very important aspect of anti-seepage engineering. [0003] At the same time, in hazardous waste landfills with a high environmental protection level, vertical ...

AI Technical Summary

Problems solved by technology

The rigid cut-off wall has both load-bearing and anti-seepage functions, but if only its anti-seepage characteristics are used, the rigid cut-off wall has obvious disadvantages, such as high elastic modulus, which is prone to stress concentration and cracks, and it is very difficult to connect with the foundation. Leakage hazards are formed, and the concrete cut-off wall is extremely difficult to remove, which affects subsequent development and construction.

Plastic cut-off wall is an improved cut-off wall technology based on the shortcomings of rigid cut-off walls. It uses bentonite, clay and other admixture materials to replace part of the cement in ordinary concrete to form a low-strength, low-elastic-modulus cut-off wall material. , but it only improves the deficiencies of the rigid cut-off wall, and cannot completely solve the above problems

Flexible anti-seepage walls are currently widely used in water conservancy projects. They have the characteristics of simple construction, low engineering cost, similarity to the surrounding soil, and the construction site can be redeveloped and constructed. However, its anti-seepage performance is difficult to meet -7 Environmental protection requirements of cm / s

Curtain anti-seepage wall technology is HDPE geomembrane vertical anti-seepage wall, which can achieve a good anti-seepage effect, but its technical difficulty is high, the project cost is expensive, and the HDPE geomembrane can not be completely combined with the surrounding soil, in the anti-seepage When the seepage wall undergoes geological movement, the geomembrane is easily separated from the surrounding soil, which affects the quality of the project

The common disadvantage of the above anti-seepage walls is that they only have an isolation effect. Even if the permeability coefficient can meet the technical requirements, there will still be leachate through, so that the harmful substances in it will pollute the soil and groundwater.

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