Analysis on effective stress formula and consolidation of gassy muddy clay  

作　　者：徐浩峰 应宏伟 谢新宇 谢康和 

机构地区：[1]Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China [2]Coastal and Urban Geotechnical Engineering Research Center, Zhejiang University, Hangzhou 310058, China [3]Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, (Zhejiang University), Hangzhou 310058, China

出　　处：《Journal of Central South University》2014年第4期1594-1599,共6页中南大学学报（英文版）

基　　金：Projects(51278462,51378469)supported by the National Natural Science Foundation of China;Project(2011B81005)supported by Ningbo Science and Technology Innovation Team,China;Project(2013A610202)supported by Ningbo Natural Science Foundation of China

摘　　要：In order to found an applicable equation of consolidation for gassy muddy clay, an effective stress formula of gas-charged nearly-saturated soils was introduced. And then, a consolidation equation was derived. Subsequently, supposing soils were under tangential loading, the expressions of pore water pressure were presented. The analytic solution of pore water pressure was attempted to be validated by the measured values in a real embankment. The parameters in the expressions of pore water pressure were gotten by the method of trial. The result shows that the consolidation model is rational and the analytic solution of pore water pressure is correct. The following conclusions can be made: 1) the influence of bubbles on the compressibility of pore fluid should be considered; 2) the effective stress would be influenced by bubbles, and the consolidation would depend on the compressibility of soil skeleton: the softer the soils are, the more distinct the influence of bubbles is; for normal clay, the influence of bubbles on the effective stress may be commonly neglected.In order to found an applicable equation of consolidation for gassy muddy clay, an effective stress formula of gas-charged nearly-saturated soils was introduced. And then, a consolidation equation was derived. Subsequently, supposing soils were under tangential loading, the expressions of pore water pressure were presented. The analytic solution of pore water pressure was attempted to be validated by the measured values in a real embankment. The parameters in the expressions of pore water pressure were gotten by the method of trial. The result shows that the consolidation model is rational and the analytic solution of pore water pressure is correct. The following conclusions can be made： 1） the influence of bubbles on the compressibility of pore fluid should be considered; 2） the effective stress would be influenced by bubbles, and the consolidation would depend on the compressibility of soil skeleton： the softer the soils are, the more distinct the influence of bubbles is; for normal clay, the influence of bubbles on the effective stress may be commonly neglected.

关 键 词：muddy clay gas bubble consolidation effective stress unsaturated soil 

分 类 号：TU43[建筑科学—岩土工程]