Cement-bentonite vertical antifouling separating wall structure and method

Abstract

The invention discloses a cement-bentonite vertical antifouling separating wall structure and a method. The cement-bentonite vertical antifouling separating wall structure comprises a cement-bentonitewall and material proportioning thereof, guide walls arranged on the two sides of the ground surface of the cement-bentonite wall and overlying structures on the top faces of the cement-bentonite wall and the guide walls and surrounding ground. The cement-bentonite wall penetrates to a relatively waterproof soil layer through a high-permeability rock soil layer from the ground surface, and a stable upstream water level face and a downstream water level face are formed on the high-permeability rock soil layer. The wall material has the beneficial effects of being high in water content, low inpermeability, high in deformation resistance, high in shear strength and the like. By means of the one-step construction method of excavating groove protection walls and directly forming the wall material from bentonite mud through hydrating and hardening, the method is simple, the working face is small, and the construction process of the vertical antifouling separating wall is simplified. The formed separating wall is used for concentrating pollution source underground water transfusion adjustment and control and pollutant diffusion prevention and control, and is especially suitable for theworking condition that overlying pressure or foundation lateral pressure is large.

Description

technical field [0001] The invention relates to methods for controlling groundwater seepage and preventing and controlling groundwater and soil environmental pollution, and in particular to a cement-bentonite vertical anti-pollution separation wall structure and method. Background technique [0002] my country's rapid economic development has also caused serious groundwater and soil 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. The heavy metals and The content of organic pollutants significantly exceeded the standard. The vertical anti-pollution separation wall is the main technical means to effectively control the above-mentioned pollution sources from polluting the surrounding underground environment. [0003] Different from the high-quality natural sodium-based bentonite produc...

AI Technical Summary

Problems solved by technology

Under the same conditions, the soil-bentonite prepared with calcium-based bentonite or modified calcium-based bentonite is not as good as the soil-bentonite prepared with natural sodium-based bentonite in terms of anti-seepage and adsorption properties, and it is difficult to achieve underground pollution prevention. control technical requirements

[0004] The construction process of vertical antifouling separation walls such as soil-bentonite and plastic concrete is mainly composed of two main steps: "excavation of trenches / mud retaining walls, backfilling / replacement of mud", and the construction technology is relatively complicated

At the same time, the commonly used soil-bentonite vertical antifouling separation wall has low shear strength, which is difficult to withstand large overlying pressure or lateral pressure of the foundation, and is prone to large deformation, which affects the vertical antifouling under the above working conditions. Integrity and long-term service performance of the pollution separation wall

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