利用CPTU对淤泥质黏土工程性质的评价.pdf

31 1 2011 2 Vol. 31 No. 1 Advances in Science and Technology of Water Resour ces Feb . 2011 DOI 10. 3880/ j . issn . 2011. 01. 0 16 利用CPTU 对淤泥质黏土工程性质的评价 周海祚, 张富有, 安彦勇, 何 毅 ( 1. , 21009 8; 2. , 2 10098) 针对某场地河滩沉积淤泥质黏土, 利用CPTU ( 孔压静力触探) 对该场地不同深度的淤泥质黏 土进行原 孔压消散试验, 得出其固结系数将该固结系数与室内试验所得的固结系数进行比较, 得到现场测得的固结系数比室内试验测得的固结系数约大1~ 2 个数量级的结论介绍了CPTU 估算不排水抗剪强度的方法, 对比十字板剪切试验结果, 对各种估算方法在该种土质中的适用性作 出评价, 确定了各种方法经验系数的取值范围 孔压静力触探; 淤泥质黏土; 固结系数; 不排水抗剪强度 TU4112; TU4117 B 2011) Evaluation of engineering characteristics of mucky clay using static cone penetration tests/ / ZHOU Hai zuo, ZHANG Fu you, AN Yanyong, HE Yi (1. Key Laboratory of Ministry of Educationf or Geomechanics and Embankment Engineering , Hohai University, Nanj ing 210098, hina; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, hina) Abstract Taking the mu cky clay on a river beach as an example, the insitu tests on porepressure dissipation of the mu cky clay at diff erent depths w ere performed by use of the static cone penetration ( CPTU) tests, and the consolidation coefficient w as obtained . It was compared w ith th at from the laboratory tests, indicating that the consolidation coefficient determ ined by the CPTU test s was 10 to 100 tim es higher that m easured in the laboratory. The m ethod for estimating the undrained shear strength by means of the CPTU test s w as introduced . Its results w ere compared w ith those from the vane shear tests . The applicability of those methods f or the mu cky soil w as evaluated, and the scope of their empirical coeff icient s w as determined . Key words porepressure static cone penetration test; mucky clay; consolidation coeff icient ; un