摘要
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位孔压消散试验,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。
Taking the mucky clay on a river beach as an example,the in-situ tests on pore-pressure dissipation of the mucky clay at different depths were performed by use of the static cone penetration（CPTU） tests,and the consolidation coefficient was obtained.It was compared with that from the laboratory tests,indicating that the consolidation coefficient determined by the CPTU tests was 10 to 100 times higher that measured in the laboratory.The method for estimating the undrained shear strength by means of the CPTU tests was introduced.Its results were compared with those from the vane shear tests.The applicability of those methods for the mucky soil was evaluated,and the scope of their empirical coefficients was determined.
出处
《水利水电科技进展》
CSCD
北大核心
2011年第1期66-69,共4页
Advances in Science and Technology of Water Resources
基金
中央高校青年骨干教师基金(B1020141)
关键词
孔压静力触探
淤泥质黏土
固结系数
不排水抗剪强度
pore-pressure static cone penetration test
mucky clay
consolidation coefficient
undrained shear strength
