A kind of technical method for rapid desalination of soil in seashore filling bare land

Abstract

The present invention relates to a technical method for rapid desalination of soil in coastal dredging and filling bare land. The method comprises: 1) inserting dead branches of Tamarix tamarisk on the soil surface, using xylem to enrich salt, and removing the cutting branches after 30-60 days; 2. ), repeat the above steps. The technology of the present invention is simple to operate, does not require land leveling, does not require engineering machinery construction, and does not require the addition of exogenous additives. Only through the transmission of the xylem of the cuttings of Tamarix cuttings, the salt is quickly concentrated on the periphery of the cuttings, forming salt frost or Salt ice, fast desalination, small engineering, low cost (≤8 yuan / m 2 ), and the salt removed from the soil can be collected and utilized again, which has significant economic benefits.

Description

technical field [0001] The invention relates to a technical method for desalination of coastal saline-alkali soil, in particular to a technical method for rapid desalination of coastal dredged fill soil. Background technique [0002] Coastal dredging is a sedimentary soil formed by dredging the seabed mud from the offshore through hydraulic dredging. Affected by the seawater environment, dredger fill has high salinity, strong alkalinity, fine particles (mainly clay), large water holding capacity, high content of invalid pore water, and tight texture. Under natural conditions, the improvement of the quality of dredger fill depends entirely on the emergence and growth of the pioneer plant Suaeda salsa. Generally, it needs to be deposited for at least 5 years. When Suaeda salsa grows in patches, the dual effects of plants and precipitation The section begins to desalinate, and the natural desalination period is extremely long, which cannot meet the ecological needs of existing...

AI Technical Summary

Problems solved by technology

Under natural conditions, the improvement of the quality of dredger fill depends entirely on the emergence and growth of the pioneer plant Suaeda salsa. Generally, it needs to be deposited for at least 5 years. When Suaeda salsa grows in patches, the dual effects of plants and precipitation The section starts to desalinate, and the natural desalination cycle is extremely long, which cannot meet the ecological needs of existing urban construction

At present, the effective desalination technology of coastal dredger fill is mainly the salt control and salt suppression technology combining "soil improvement", "irrigation" and underground "separation" and "drainage" projects. The construction cost is high, the cycle is long, and the engineering quantity However, most of the bare land for coastal dredging and reclamation is temporary idle land for construction. The existing treatment technology is not suitable for the ecological management of dredging and reclamation of bare land. Therefore, there is an urgent need for a low-cost, fast and effective coastal dredging and reclamation Soil rapid desalination method