检索结果-南通市图书馆

Biogeotechnics 2023年第2期1卷 42-54页

作者： Chaosheng Tanga Xiaohua Pana Yaojia Cheng Xinlun Jia updates School of Earth Sciences and Engineering Nanjing UniversityNanjing 210023China

Loess is widely distributed all over the world,covering about 10%of the land surface on *** is one of the countries with the most serious loess soil erosion in the world,especially the loess *** is mainly related to the poor water stability and mechanical properties of the loess.A new coupling method of bio-ce-mentation(Microbially Induced Calcite Precipitation:MICP)and sand additive to improve the hydro-mechanical behavior of loess was *** feasibility,coupling improvement mechanism and the effects of sand content,bio-cement treatment cycle and cementation solution(cs)concentration were investigated through a series of *** results indicated that the proposed method was effective to improve the water stability and structure strength of *** coupling improvement performance were positively related to the sand *** the sand content was 40%,compared to bio-cement treatment,the coupling treatment was 9 times deeper in treatment depth,3.5 times stronger in peak structure strength,and the sum slaking rate was less than *** coupling improvement mechanism can be attributed to the form of the double layers including hard crust and cemented *** the addition of sand,the thickness,structure strength and water stability of the double layers *** main reason is that there were more interfacial voids between sand particles and loess particles,increasing the permeability of loess and treatment depth,forming more amount of calcium *** on the experimental condition in this study,1.0 M of CS concentration was the optimal spaying strategy to improve the hydro-mechanical properties of loess.

关键词： Loess Erosion resistance MICP sand additive Water stability Structure strength

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