Method for improving dredger fill into greening soil

Abstract

The invention provides a method for improving dredger fill into greening soil, and belongs to methods for improving poor soil sources. The method comprises the technical approaches that after coastal dredger fill settles and is solidified, chemical and biological improvement is conducted on the dredger fill, the improving method comprises the steps that a salt elimination device and an eluvial horizon are laid in a reverse dug groove, the reverse dug groove is refilled with soil and then leveled, ameliorants are stirred in the surface layer with the thickness being 0 cm-60 cm and mixed evenly, irrigation drip washing is conducted, sesbania is planted, harvested within one growing period and turned into the soil, and greening seedlings are planted commonly. The method can effectively improve physical and chemical properties of the dredger fill and rapidly reduce the content of salt in the dredger fill, is obvious in improving effect, and makes effective use of coastal soil resources difficult to use.

Description

technical field [0001] The invention belongs to the field of soil improvement, in particular to a utilization method for improvement of coastal soil sources. Background technique [0002] The land formed by consolidation and dehydration after dredging and reclamation of bay mud is called dredging fill in harbor engineering, and has some basic properties of soil, such as colloidal properties, adsorption, substitution, etc., and its mechanical composition is mostly powder ( sand) grains and clay, the soil is unstructured, firm when dry and muddy when wet. The soluble salt content is extremely high, generally above 1.5%, and sodium and chloride ions occupy an absolute advantage in the total amount of ions. The ventilation and water seepage ability is extremely poor, and the salt is difficult to wash off directly by rinsing with water. In short, due to the poor physical and chemical properties of the dredged fill soil, it cannot be directly used as greening planting soil, and ...

AI Technical Summary

Problems solved by technology

[0003] At present, the improvement measures of saline-alkali soil in various countries are mainly reflected in the following technologies: water conservancy improvement, physical improvement, chemical improvement and biological improvement. Different improvement methods have been applied in actual production, but none of them can achieve the expected results.

Either the investment is too high, or it is limited by conditions