软黏土在卸荷作用下孔隙水回流规律的试验研究  

Test research of pore water back-flow law of soft clay in the unloading process

作　　者：汤斌[1,2] 刘亚光[1] 雷俊[1] 汪稔[2] 

机构地区：[1]武汉科技大学城市建设学院,湖北武汉430065 [2]中国科学院武汉岩土力学研究所岩土力学重点实验室,湖北武汉430071

出　　处：《四川建筑科学研究》2012年第5期101-103,117,共4页Sichuan Building Science

摘　　要：通过改装后的三轴仪进行室内试验,研究武汉地区软黏土在卸荷作用下孔隙水回流的规律。试验结果表明:①软黏土在卸荷作用下存在临界卸荷比R,临界卸荷比R约为0.28和0.91;②当0﹤R﹤0.28和R>0.91时,软黏土不发生回弹变形,固结过程中排出的孔隙水不能回流到孔隙中;当R在0.28和0.91之间时,软黏土发生回弹变形,并且在回弹过程中吸水;③孔隙水回流量不大,约占固结作用下孔隙水排出量的10%。Abstract：With improved triaxial apparatus, pore water back-flow law of soft clay in Wuhan in the unloading process is studied through laboratory tests. The test results indicate：①Two critical unloading ratios exist in the soft clay in Wuhan area,which are 0.28 and 0. 91. ②When the soft clays unloading ratio is 0 〈 R 〈 0. 28 or R 〉 0. 91, resilience deformation of the soft clay would not be produced, neither the pore water drained out in the consolidation process would flow back. When 0.28 ≤R≤0. 91 ,the resilience deformation would be produced and the pore water back-flow would take place during the resilience course. ③The amount of the pore water back-flow is not so large that it is just about 10 percent of the water that has been drained out during the consolidation process.

关 键 词：软黏土 卸荷作用 孔隙水回流 试验研究 

分 类 号：TU411[建筑科学—岩土工程]