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饱和软黏土不同固结程度下的抗剪强度特性研究 预览

Experimental Study on Shear Strength Properties of Saturated Soft Clay with Different Degrees of Consolidation
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摘要 为了研究饱和软黏土在不同固结度下的抗剪强度特性,利用应力应变控制式三轴剪切渗透试验仪开展饱和软黏土不同固结程度下的三轴剪切试验研究,对不同围压下不同固结度对土体孔压增量和抗剪强度的影响进行了分析。结果表明:在部分固结不排水剪切试验中,试样的剪前固结程度越低、剪前孔压越大,则剪切引起的孔压增量越小,但总孔压却是越大,不排水强度低。通过归一化,得到了孔压增量和固结度之间的相关关系。 In order to study the shear strength characteristics of saturated soft clay under different degree of consolidation,the stress-strain controlled triaxial shear permeability tester was used to carry out triaxial shear tests of saturated soft clay under different degree of consolidation. The effects of different degree of consolidation under different confining pressures on pore pressure increment and shear strength of soil were analyzed. The results show that in partial undrained shear tests,the lower the pre-shear consolidation degree and the larger the pre-shear hole pressure,the smaller the pore pressure increment caused by shear,but the larger the total hole pressure and the lower the undrained strength. By normalization,the correlation between pore pressure increment and consolidation degree is obtained.
作者 郑泽宇 徐可 ZHENG Zeyu;XU Ke(Key Laboratory of Geomechanics and Embankment Engineering of the Ministry of Education, Hohai University,Nanjing 210098,China;Jiangsu Research Center for Geotechnical Engineering Technology,Hohai University,Nanjing 210098,China)
出处 《河北工程大学学报:自然科学版》 CAS 2019年第2期5-9,共5页
基金 国家自然科学基金资助项目(51578213).
关键词 不同固结度 抗剪强度 体变 孔压 different degree of consolidation shear strength volume change pore pressure
作者简介 郑泽宇(1994-),男,安徽六安人,硕士研究生,主要研究方向为软基处理。
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