Soil improving method for improvement of subway shield soil and dredged soil and greening of landfill yards

Abstract

The invention relates to a soil improving method for improvement of subway shield soil and dredged soil and greening of landfill yards. The method is characterized by comprising the following steps of (1), adding an improver and a microbial inoculant into the soil to improve the soil, wherein the improver contains the following main components of turf, grain and perlite, the inoculant of the microbial inoculant is bacillus megatherium, and a carrier is peat dust; and (2), improving a nitrogen-fixing plant of Lucerne, utilizing the Lucerne which is a legume and has higher biological nitrogen-fixing capability, and sowing the Lucerne on the ground with flattened soil, wherein the sowing amount is 2 to 3g / m<2>, the sowing period is May to August, and plants are ploughed into the soil after autumn. The method is characterized in that the microbial inoculant is inoculated onto a liquid culture medium, and is subjected to shaking culture for 2 to 3 days, a 200ml parent inoculant solution is obtained from each bottle of freeze-drying inoculant (bacillus megatherium), the parent inoculant solution is inoculated into the sterile peat dust with a humidity of 50% to 60%, and 0.5kg peat dust is inoculated into every 10ml of inoculant solution. The method has the advantage that the soil structure and the quality difference of the subway shield soil and the dredged soil are improved, so the growth and the development of the greening plants planted in a sealed area can be met.

Description

technical field [0001] The invention relates to a soil improvement method for improving subway shield soil and dredging fill soil and using it for landfill greening. Background technique [0002] At present, in order to improve the ecology of the landfill closed area, the experiment of planting trees and greening in the closed area of ​​the waste landfill is carried out. , waste fermentation heat conduction), shortage of irrigation water in the closed area, sealing film (HDPE film) or clay barrier, etc., due to the limited source of closed planting soil and high cost, a large number of subway shield soil and dredging fill are used. The poor soil structure and quality are the key to restricting the greening in the closed area of ​​the waste landfill. From the early stage, the greening planted on it generally cannot survive and grow. Therefore, it is impossible for plants to grow and develop normally without solving the above-mentioned problems of poor soil structure and qual...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem in the prior art that the poor soil structure and quality of subway shield soil and dredging fill soil in the planting of greening plants in large-area closed areas cannot meet the normal growth and development of planting greening plants, and provide a A soil improvement method for improving subway shield soil and dredging fill soil and using it for landfill greening