Method for in-situ improvement of dredger fill into soil for planting

Abstract

The invention discloses a method for in-situ improvement of dredger fill into soil for planting, aiming at providing the method through which the investment in soil change is reduced and limited land resources are protected by utilizing the dredger fill which is used as a matrix after being subjected to fast desalinization and fertilizer application by directly utilizing a soil improving material without soil change. The method comprises the following steps of: laying stripe-like spraying layers in the dredger fill, wherein the laying thickness of the spraying layers is 20cm; digging a collecting gutter under each spraying layer, laying a blind pipe in each collecting gutter, winding polypropylene yarns outside each blind pipe, and performing desalinization through the spraying layers and the blind pipes; blending an improving material comprising organic matters and inorganic matters into the dredger fill, wherein the blending depth can ensure that the soil in root layers of plants is in contact with the improving material; and irrigating washing brine. According to the method disclosed by the invention, the soil change is avoided, the operation is simple, the improvement effect is good, and damages to the soil resources, engineering investment and construction procedure can be reduced. Furthermore, green coverage can be fast increased, and a living environment of residents can be improved so as to be conductive to construction of an eco-city.

Description

technical field [0001] The invention relates to a method for in-situ improvement of dredging fill soil into planting soil. Background technique [0002] Sea silt soil is the land formed by consolidation and dehydration after dredging land reclamation. It is called dredger fill in harbor engineering, and it belongs to the offshore sediments of water and soil erosion in the upper reaches of rivers. It has not yet undergone soil-forming processes such as physical weathering, chemical weathering and biological weathering. The physical properties of dredger fill are extremely poor, hard when dry, muddy when wet, poor ventilation and water seepage capacity, extremely high soluble salt content, generally 1.5% to 2.5%, and sodium and chloride ions occupy an absolute advantage in the total amount of ions. [0003] The dredger fill soil referred to in the present invention is dredger fill soil used for land reclamation in coastal areas, which has a heavy texture, high salt content, g...

AI Technical Summary

Problems solved by technology

Therefore, most landscaping constructions are carried out using the method of "external soil". Large-scale soil replacement will cause great damage to the surrounding environment, have serious negative effects, and increase the comprehensive cost of construction and development. Soil resources are becoming more and more tense