摘要
基于先进的静力触探设备,根据锥尖阻力和灵敏的孔压进行了土层划分。贯入过程中,在土层不同深度处进行孔隙水压力消散试验,分析了砂性土和粘性土孔压消散特征,推算出的土体固结系数符合实际情况。分别采用理论和经验公式计算了软粘土的不排水抗剪强度,对各类方法的计算精度进行了对比分析,在此基础上确定了软粘土地基强度计算经验参数的取值范围,为该区域静力触探勘察设计工作提供了地区性经验指标。
Soil layers are delimited according to tip resistance and sensitive pore pressure based on advanced CPT equipment.Dissipation of the pore pressure is measured at different soil depths in the process of penetration,pore pressure dissipation characteristics of the sandy and clayey soil are analyzed and the consolidation coefficients derived are accord with actual situations.Theoretical and empirical formulas are used to calculate the undrained shear strength of the soft clay,on the basis of analyzing the calculation accuracy of different methods,the values range of empirical parameters of soft clay foundation strength are determined,thus,it provides the regional empirical indexes for CPT investigation and design in the region.
出处
《勘察科学技术》
2009年第3期8-12,共5页
Site Investigation Science and Technology
