Method for shallow part enhancement type soil-swell soil vertical antifouling separating wall

Abstract

The invention discloses a method for a shallow part enhancement type soil-swell soil vertical antifouling separating wall. The method comprises the following steps: firstly, a field is flattened, a groove is excavated to a waterproof layer and the width of the shallow part groove is enlarged along two sides of the groove central line, wherein the bottom portion of the width enlargement portion of the shallow part groove is located below an upstream water line of a lowest pollution source; secondly, swell soil slurry is used for protecting the wall in the groove, soil-swell soil wall body materials are backfilled from the bottom of the groove to replace slurry, an impermeable plate is inserted in the center of the width enlargement portion of the shallow part groove and piling loading or vacuum prepressing is conducted at the top portion of the groove and the fields around the groove, so that the soil-swell soil backfilling materials begin to solidify under the collective action of self weight and piling loading or vacuum prepressing and the soil-swell soil separating wall is formed in the shallow part, wherein the pollution dispersal performance of the soil-swell soil separating wall is enhanced. Aimed at the fact that an antifouling protective screen in the shallow part is large in pollution load and can be affected by the negative factors such as weather and temperature easily, the method for the shallow part enhancement type soil-swell soil vertical antifouling separating wall enhances impermeability and durability of weak links. The method for the shallow part enhancement type soil-swell soil vertical antifouling separating wall is strong in pertinency, convenient to construct, low in construction cost, environmental-friendly and capable of satisfying the pollution prevention and control requirements.

Description

technical field [0001] The invention relates to a method for preventing and controlling groundwater pollution, in particular to a method for a shallow reinforced soil-bentonite vertical anti-pollution separation wall. Background technique [0002] Since the 1980s, vertical separation walls have been widely used in underground pollution control, such as waste landfills, industrial pollution sites and other concentrated pollution sources to enclose or block. Soil-bentonite wall is a commonly used type of vertical separation wall, and its main backfill material is usually a mixture of site excavation soil and bentonite slurry. Compared with other vertical separation walls, the soil-bentonite wall has better anti-seepage and anti-fouling properties, simple construction, low cost, and good wall continuity after completion. [0003] A large number of laboratory tests show that the anti-seepage performance of soil-bentonite decreases significantly with the decrease of consolidatio...

AI Technical Summary

Problems solved by technology

The existing design and construction methods do not take into account that shallow walls are easily penetrated by pollutants, which is the main reason for the unsatisfactory effect of pollution prevention and control in some soil-bentonite walls.

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