CPTU试验在土体动力学参数计算中的应用研究  

Analyses of calculating soil kinetic parameters with CPTU testing

作　　者：李小雪[1] 彭祖武[1] 滕伟福[1] 

机构地区：[1]中国地质大学(武汉),湖北武汉430074

出　　处：《水文地质工程地质》2013年第3期84-88,共5页Hydrogeology & Engineering Geology

摘　　要：为探讨孔压静力触探(CPTU)数据能否在土体动力学参数计算中进行应用,结合港珠澳大桥补充勘察项目CPTU及波速测试资料,利用SPSS和OriginPro软件对比分析前人研究成果,提出了更适合于计算研究区波速(Vp、Vs)的经验拟合公式,公式考虑了深度影响,计算结果优于前人经验公式,尤其是当土层埋深大于30m时。基于此,对CPTU数据在土体动力学参数Ed、Gd及μd计算方面进行了对比分析研究,提出了研究区土体动力学参数计算公式,公式计算偏差均在可接受范围之内。同时发现土层深度及修正锥尖阻力的负指数形式在拟合土层纵、横波速Vp、Vs时具有重要意义。In order to discuss whether the CPTU data can be used in soil kinetic parameters computation,the SPSS and OriginPro software are applied to comparatively analyze previous research results and proposed a more suitable formula for calculating the wave velocities(Vpand Vs) of the study area,on the basis of CPTU data and wave velocity testing data of the Hong Kong-Zhuhai-Macao Bridge supplementary investigation project.Depth is considered in the formula that is proposed in the article.The results show that the formula is superior to precursors' empire formulas,especially when buried depth is greater than 30m of soil mass.The calculations of soil kinetic parameters Ed,Gdand μd are comparatively analyzed.A formula for calculating the soil kinetic parameters in the study area is proposed and the calculation deviation can be tolerated.The results show that calculating soil kinetic parameters with CPTU data are feasible and calculating effects of the method proposed in this article is the best.Meanwhile,it is found that soil depth and correction static point resistance's negative-index form play an important role in fitting P-wave velocity Vp and shear wave velocity Vs.

关 键 词：孔压静力触探 土体动力学参数计算 波速拟合 对比分析 

分 类 号：TU435[建筑科学—岩土工程]