摘要
为了获得非均质土的力学指标,进行了非均质土中孔压静力触探试验(PCPT)研究。通过引入钻机引孔配合施工工艺与采用多重护管的施工手段,解决了在非均质土层中孔压静力触探试验无法满足设计深度的问题,从而实测得非均质土的锥尖阻力(q_(c))、侧壁阻力(f_(s))、探头倾角(l)及动孔隙水压力(u_(2))。通过对上述指标分层统计分析与计算,获得非均质土的不排水剪切强度与内摩擦角指标,为建设工程提供地基基础设计重要的岩土参数。
To obtain mechanical indexes of non-homogeneous soils,a study of piezocone penetration test(PCPT)in non-homogeneous soils is conducted.The problem that the PCPT test can not satisfy the design depth is solved by introducing the construction technique of rig-led hole with multiple pipe guards,so that the cone tip resistance(q_(c)),sidewall resistance(f_(s)),probe inclination(l)and dynamic pore water pressure(u_(2))of non-homogeneous soil can be measured.With the layering statistical analysis and calculation of the above indicators,we calculate the undrained shear strength and internal friction angle indicators of the non-homogeneous soil,which provide critical geotechnical parameters for the foundation design of construction projects.
作者
段存俊
吴朝东
赵欣
DUAN Cun-jun;WU Chao-dong;ZHAO Xin(CCCC Third Harbor Consultants Co.,Ltd.,Shanghai 200032,China)
出处
《水运工程》
北大核心
2022年第2期186-190,共5页
Port & Waterway Engineering
关键词
非均质土
孔压静力触探试验
勘察
non-homogeneous soil
piezocone penetration test(PCPT)
investigation
