A Comprehensive Improvement Method of Coastal Salt Soil

Abstract

The invention discloses a method for comprehensive improvement of coastal saline soil, comprising: a. building a curtain wall formed by grouting between the coastal saline soil to be improved and a seawall; b. inside the coastal saline soil surrounded by the curtain wall, Build a salt drainage system underground for coastal saline soil; c. Build a freshwater pipeline irrigation system. The curtain wall can effectively block the sea water and prolong the effectiveness of the coastal greening landscape. In step b, a number of salt drainage ditches are dug in the soil body, a salt drainage well is arranged in the salt drainage trench, and the bottom of the salt drainage well is connected with a drainage pipe; a coarse sand cushion is arranged around the salt drainage well, and a salt drainage pipe is arranged in the coarse sand cushion , the salt discharge pipe is connected with a water collection pipe, and the water collection pipe is arranged lower than the salt discharge pipe; a fixed pipe is set outside the salt discharge pipe, and the fixed pipe is provided with a permeable hole. The fixed pipe can prevent the salt discharge branch pipe from being deformed and blocked under pressure.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a comprehensive improvement method for coastal saline soil. Background technique [0002] The coastal area is a typical coastal submerged saline soil area, with high soil salinity, high groundwater level, high soil pH, low organic matter content, high wind speed, large evaporation, and high groundwater salinity. Due to the accumulation of a large amount of salt in the saline-alkali soil, a series of physical properties of the soil deteriorate: sticky structure, poor air permeability, high bulk density, compaction, slow rise in soil temperature, poor activity of aerobic microorganisms in the soil, slow water release, infiltration The coefficient is low, and the capillary action is strong, which leads to the aggravation of surface soil salinization. It can be seen that doing a good job in salt drainage and soil improvement projects is the key to ensuring long-term effects...

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Problems solved by technology

[0004] However, the focus of the above-mentioned improvement methods is passive treatment. After the treatment is completed, as the seawater erodes the seawall soil continuously, the salt in the seawater will infiltrate into the seawall soil again, causing the salt content in the seawall soil to increase again. The increase will still cause adverse effects on the vegetation in coastal areas and affect the long-term effectiveness of greening landscape projects

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