惠州港区软土室内与原位十字板剪切试验强度对比分析  

Comparative analysis of laboratory and in-situ vane shear test strength of soft soil in Huizhou Port area

作　　者：戚玉红[1] 刘长殿 安鹏程[1] 张纪欣[1] 孟令福[1] QI Yu-hong;LIU Chang-dian;AN Peng-cheng;ZHANG Ji-xin;MENG Ling-fu(CCCC First Harbor Consultants Co.,Ltd.,Tianjin 300222,China)

机构地区：[1]中交第一航务工程勘察设计院有限公司,天津300222

出　　处：《中国港湾建设》2023年第2期44-47,共4页China Harbour Engineering

摘　　要：原位十字板剪切试验的应用已非常成熟,而室内十字板剪切试验的研究和实际应用尚不多见。依托惠州港区勘察项目对软土进行了室内与原位十字板剪切试验的初步对比研究,得出结论:相同深度处室内试验强度小于原位测试强度,室内测试深度效应较弱而原位测试深度效应更明显;造成室内、原位十字板强度差异的主要原因一是应力状态的差异,二是取样和样品运输过程中土样扰动造成的强度损失;原位十字板抗剪强度与室内测试强度和试验深度相关性良好,惠州港区软土利用室内十字板强度估算的原位十字板强度和实测值平均误差约为12%,可在不具备原位十字板测试条件时通过室内试验间接获得较为可靠的原位十字板强度数据。The application of in-situ vane shear test is very mature,while the research and practical application of laboratory vane shear test is still rare.Based on the exploration and prospecting in the Huizhou Port area,preliminary comparative analysis was made of the laboratory and in-situ vane shear tests of the soft soil in the port area and the following conclusions were reached:when at the same depth,the vane strength by laboratory vane shear test was smaller than that by in-situ vane shear test,and the effect of depth by laboratory vane shear tests was weaker while the effect of depth by in-situ vane shear test was more evident;the main reasons for the strength difference between the laboratory vane shear tests and in-situ vane shear tests were the difference of stress states and the strength loss caused by soil sample disturbance in the process of sampling and transportation.The vane shear strength by in-situ vane tests and that by laboratory vane tests were correlated well with the test depth.The average error between the in-situ vane shear strength of soft soil estimated by laboratory vane tests and that measured by in-situ vane tests in Huizhou Port area was about 12%,and relatively reliable in-situ vane strength may be obtained indirectly through laboratory tests when site conditions are not available for in-situ vane shear strength.

关 键 词：室内十字板剪切试验 软土 抗剪强度 深度效应 

分 类 号：U655.544[交通运输工程—港口、海岸及近海工程] TU411[交通运输工程—船舶与海洋工程]