摘要
在海洋岩土工程勘察和设计中,不排水抗剪强度是尤为重要的强度参数。为了精确评价海相软土的不排水抗剪强度,依托澳门国际机场扩建工程场地的孔压静力触探试验与十字板剪切试验资料,对海相软土的不排水抗剪强度进行计算,并提出了锥尖因子N_(kt)与归一化有效锥尖阻力Q_(E)的线性相关关系,基于这种线性关系所预测的不排水抗剪强度与十字板剪切试验结果更相符。同时,所给出的锥尖因子可以反应原位土体很好地沿深度方向的空间变异性。对于澳门海相软土强度参数可采用文中标定得到的N_(kt)-Q_(E)关系进行解译,为设计提供可靠的岩土设计依据。
In the survey and design of marine geotechnical engineering,undrained shear strength is a particularly important strength parameter.In order to accurately evaluate the undrained shear strength of marine soft soil,the undrained shear strength of marine soft soil was calculated based on the data from piezocone penetration tests and vane shear tests at the expansion project site of Macao International Airport,and a linear correlation between cone tip factor N_(kt) and normalized effective cone tip resistance Q_(E) was proposed.The undrained shear strength predicted based on this linear relationship is more consistent with the vane shear test results.At the same time,the given cone tip factor can reflect the spatial variability of the in-situ soil well along the depth direction.For Macao marine soft soil strength parameters can be interpreted using the N_(kt)-Q_(E) relationship obtained from the calibration of this paper,providing a reliable geotechnical design basis for design.
作者
段存俊
刘彬
莫品强
DUAN Cun-jun;LIU Bin;MO Pin-qiang(CCCC Third Harbor Consultants Co.,Ltd.,Shanghai 200032,China;State Key Laboratory of Intelligent Construction and Health Operation&Maintenance of Deep Underground Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)
出处
《中国港湾建设》
2023年第11期1-5,30,共6页
China Harbour Engineering
基金
国家自然科学基金(52178374)
徐州市基础研究计划项目(KC22019)。
关键词
孔压静力触探
海相软土
不排水抗剪强度
数据解译
piezocone penetration test
marine soft soil
undrained shear strength
data interpretation
