Desalting structure and desalting method for improving saline-alkali soil

Abstract

The invention provides a desalting structure and a salt elimination method for improving saline-alkali soil. The desalting structure comprises a foundation trench and a salt elimination open trench, a plurality of salt elimination blind pipe ditches are dug in the groove bottom of the foundation groove, the two ends of each salt elimination blind pipe ditch are communicated with the salt elimination open ditches, the salt elimination blind pipe ditches are filled with saltpeter, and salt elimination blind pipes are embedded in the saltpeter; a drainage plate, a geonet and geotechnical cloth are sequentially laid from bottom to top in an area, which is not provided with the salt elimination blind pipe ditch, of the bottom of the foundation trench; an original soil layer is backfilled on the geotechnical cloth and the salt elimination blind ditch, a plurality of vertically arranged drainage belts are inserted in the original soil layer, the lower edges of the drainage belts extend to the bottom surface of the original soil layer, and a distance is reserved between the upper edges of the drainage belts and the surface layer of the original soil layer. The desalting structure disclosed by the invention has the advantages of high leaching efficiency, low manufacturing cost and simplicity and feasibility in construction while the salt leaching and isolating functions are ensured.

Description

Technical field [0001] The present invention belongs to the field of saline-alkali land treatment technology, in particular to a desalination structure for improving saline-alkali land and a desalination method. Background [0002] Saline-alkaline soil is a widely distributed type of soil on Earth, which is formed and developed under certain environmental conditions or the influence of human activities. The genesis of saline-alkaline soil can be divided into natural causes and man-made reasons, the underground diving site rises, the mineralization degree increases, the climate drought, and the evaporation increases, resulting in the intensification of salinization or alkalinization process of the topsoil, and finally manifests as the phenomenon of aggravation of salinity or alkalinity of the soil surface. Saline-alkaline soils seriously affect plant growth, and when the salinity content of topsoil reaches 1%, crops will be seriously reduced, and most seeds cannot germinate. There...

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Problems solved by technology

However, this technology requires a large amount of rock salt raw materials, and requires large-scale machinery to enter the site for construction, and the leaching efficiency of saline soil is also relatively low, which seriously limits the wider promotion and application of physical salt drainage and barrier measures in saline-alkali land treatment. application

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