Construction method for laying permeable inverse-seepage preventing layer on bottom of river and lake

Abstract

An construction method of air permeable impervious liner on the bottom of rivers or lakes comprises the following steps: Arrange a plurality of square caissons in an edge-to-edge mode on the bottom of a river or lak before pumping water out of each caisson; take solid materials, such as magnesia, perlite, wood chips and rough niter solution to mix sufficiently in a proportion to form a mixed filler; add the mixed filler into each caisson to agitate, and then, adjust pH of the mixture of the mixed filler with some sludge into 7 to 8; maintain a natural solidification for the mixture of the mixed filler with some sludge in each caisson for 30 to 48 hours, until complete solidification is fulfilled; remove the caisson. The invention provides blocks to cover the bottom of a river or a lake with the construction method, so that the bottom of the river or lake has rather good air permeability, and meanwhile, sludge on the bottom of the river or lake will not upwell, for which the river and lake water can be kept rather clear. The invention provides the construction method to fulfill it not necessary to pump all water out of a river or lake during the execution, therefore, quantity of construction works and construction cost are relatively lower.

Description

technical field [0001] The invention relates to a construction method for laying anti-reverse seepage layers at the bottom of rivers and lakes, in particular to a construction method for laying breathable anti-reverse seepage layers at the bottom of rivers and lakes. Background technique [0002] In order to prevent the silt on the bottom of rivers and lakes from surging upwards, at present, there is a method of laying films on the bottoms of rivers and lakes. Laying membranes requires a large amount of work, high cost, and poor permeability of membranes, which will make the water in rivers and lakes stagnant and cause ecological damage. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a construction method for laying a breathable anti-reverse osmosis layer at the bottom of rivers and lakes, which will not destroy the ecology of river and lake water after laying anti-reverse osmosis layers at the bottom of rivers and lakes. [0004] To ...

AI Technical Summary

Problems solved by technology

Laying the film requires a large amount of engineering and costs a lot, and the film has poor air permeability, which will make the water in rivers and lakes become a pool of stagnant water, causing ecological damage

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