岩土工程中废碱液污染土净化处理方法研究

Study on Purification Method of Waste Alkaline Soil in Geotechnical Engineering

根据污染土等效弹性应力与屈服强度关系运算废碱液污染土的延性力学参量;在此基础上建立废碱液污染土的黏粒分析控制模型,预测土壤遭到废碱液污染后的颗粒与孔隙分布情况,完成岩土工程中废碱液污染土检测,采用向废碱液污染土壤添加固化剂(水泥)和过硫酸钠实现废碱液污染土的净化处理。仿真实验结果表明,固化剂(水泥)可促进过硫酸钠净化处理废碱液污染土中的苯和1,4-二氯苯,且所提方法净化处理地表不同深度废碱液污染土中苯和1,4-二氯苯能力优于对比方法,是一种净化度高的岩石工程中废碱液污染土净化处理方法。

In-depth study on the treatment of waste alkali liquor contaminated soil in geotechnical engineering is carried out. The permeability model of waste alkali liquor contaminated soil is constructed by the method of testing waste alkali liquor contaminated soil based on stiffness softening transfer mechanics analysis. The ductility mechanical parameters of waste alkali liquor contaminated soil are calculated according to the relationship between equivalent elastic stress and yield strength On this basis, the clay analysis and control model of waste alkali liquor contaminated soil was established to predict the distribution of particles and pore space after the soil was contaminated by waste alkali liquor, and the detection of waste alkali liquor contaminated soil in geotechnical engineering was completed. The waste alkali liquor contaminated soil was purified by adding solidifying agent (cement) and sodium persulfate to the waste alkali liquor contaminated soil. The simulation results show that the solidifying agent (cement) can promote the purification of benzene and1,4-dichlorobenzene in waste alkali-contaminated soil by sodium persulfate, and the ability of the proposed method to purify benzene and1,4-dichlorobenzene in waste alkali-contaminated soil with different depths of the surface is better than that of the comparative method. It is a kind of purification method for waste alkali-contaminated soil with high purity in rock engineering.