Soil Desaturation Methods for the Improvement of Liquefiable Ground

7th Annual International Conference on Materials Science and Engineering

Shi, Cheng^1 ; Huang, Zheng^1 ; Zhou, Yundong^2 ; He, Jia^2 ; Yang, Feng^2 ; Hang, Lei^2

State Grid Jiangsu Electric Power Design Consulting Co. Ltd., Nanjing

210000, China^1

College of Civil and Transportation Engineering, Hohai University, Nanjing

210098, China^2

关键词: Engineering practices;    Excess pore water pressure;    Implementation techniques;    Liquefiable ground;    Simple operation;    Soil desaturation;    Treatment methods;    Undrained shear strength;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/562/1/012015/pdf
DOI  :  10.1088/1757-899X/562/1/012015

来源: IOP

【 摘 要 】

Soil liquefaction is a phenomenon where soil loses its shear strength and behaves like a fluid because of the increase in excess pore water pressure subject to dynamic loads such as earthquakes. Soil liquefaction can cause disastrous consequences to buildings and structures, and it is one of the main problems in geotechnical seismic engineering. At present, the traditional measures for the treatment of soil liquefaction include soil densification methods and soil cementation methods. However, these methods are relatively expensive and technically complicated in engineering practice. A new approach of soil liquefaction treatment, soil desaturation, has drawn research attentions. The desaturation treatment can reduce the excess pore water pressure and improve the undrained shear strength of loose liquefiable soils. Gas bubbles in soils serve as a buffer to increase the compressibility of soil pore and alleviate the pore pressure change. Compared with traditional soil liquefaction treatment methods, the desaturation method has many advantages, such as low cost, simple operation and so on. This paper provides a comprehensive review and analysis on the mechanisms, the desaturation implementation techniques, as well as the limitations of the desaturation methods.