Method for comprehensively improving beach sandy soil by using biochar soil and construction waste soil

Abstract

The invention discloses a method for comprehensively improving beach sandy soil by using biochar soil and construction waste soil. The method includes: cleaning topsoil, and stacking the topsoil divisionally; dumping the construction waste soil on a cleaned soil layer, and removing impurities and paving with a bulldozer and a backacting shovel to form a mixed construction waste soil layer; mixing original clean-out topsoil with the biochar soil according to a proportion, stacking, and paving the mixture on the mixed construction waste soil layer to form a middle mixed layer; mixing the construction waste soil with the original clean-out topsoil, mixing the mixture with the biochar soil according to a proportion, composting, and paving on the middle mixed layer to form a mixed layer. The method for comprehensively improving the beach sandy soil by using the biochar soil and the construction waste soil has the advantages that a good ecological environment can be maintained, the infertile beach sandy soil can be turned into an oasis, the beach environment can be optimized, waste like the construction waste soil and municipal sludge can be utilized reasonably, a stable soil structure can be formed, and faults are less prone to generating in slope areas.

Description

technical field [0001] The invention relates to the technical field of tidal flat garden sand improvement, in particular to a method for comprehensively improving tidal flat sand by using biochar soil and construction waste soil. Background technique [0002] With the rapid development of the city, the available land space of the city is gradually reduced. In order to build a green and beautiful river view and improve the urban environment, the Jiangzhong Island in the Han River Basin and the tidal flats along the river are being rationally developed and utilized. In the Hanjiang River Basin, the Jiangzhong Island and the riverside tidal flats have been scoured by the river for a long time to form the upper soil, which is mostly fine sand and silt. The groundwater level is high, the organic matter content in the soil is low, the fertility is low, and the land productivity is seriously insufficient. Therefore, it is of great practical significance to find an economical and ef...

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Problems solved by technology

[0004] According to the inquiry, the commonly used methods for sandy soil improvement are direct application of organic fertilizer, direct application of peat soil (biochar soil) produced by urban sewage treatment plants, and guest soil improvement. Direct application of peat soil can improve sandy soil. The fertility of the sandy soil can be improved to improve the structure and water and fertilizer retention of sandy soil, but there is a risk of polluting water quality in areas with high water levels, and there is agglomeration and compaction in the direct application of peat soil; the demand for simple soil improvement is large, and the reality is mostly in The original soil is taken from the soil field, which destroys the soil environment of the original area, and the transportation cost is expensive and uneconomical

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