地基承载力特征值确定土变形模量的探讨  

Discussion on determining deformation modulus of soil by characteristic value of foundation bearing capacity

作　　者：杨光华[1,2,3] 彭祥 YANG Guanghua;PENG Xiang(Department of Civil Engineering,South China University of Technology,Guangzhou 510641,China;Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,China;The Geotechnical Engineering Technology Center of Guangdong Province,Guangzhou 510635,China)

机构地区：[1]华南理工大学土木与交通学院,广州510641 [2]广东省水利水电科学研究院,广州510635 [3]广东省岩土工程技术研究中心,广州510635

出　　处：《建筑结构》2024年第8期120-128,共9页Building Structure

基　　金：国家自然科学基金项目(52078143)。

摘　　要：目前我国地基沉降计算主要采用土压缩模量来计算,再用经验系数对计算结果进行修正。这种方法对于一些结构性较强的硬土地基误差较大,主要原因是取样扰动影响。为此,探讨了变形模量与地基承载力特征值的理论联系,在笔者提出的确定变形模量经验方法基础上,总结出依据地基承载力特征值确定变形模量的方法,该方法具有理论依据,可便捷地通过岩土工程勘察报告中常提供的地基承载力特征值确定土的变形模量,能够更为准确计算地基沉降值。采用不同方法(压板试验法、压缩模量推求法、标贯击数法、承载力经验法、依据地基承载力特征值确定变形模量法)计算了若干试验案例,通过对不同方法结果的对比,初步验证了依据地基承载力特征值确定变形模量法是可行的。At present,the calculation of foundation settlement in China mainly adopts the compression modulus of soil,and then the empirical coefficient is used to modify the calculation results.The error of this method is still large for some hard soil foundations with strong structure,which is mainly due to the influence of sampling disturbance.Therefore,the theoretical connection between deformation modulus and characteristic values of foundation bearing capacity was explored.On the basis of the empirical method for determining the deformation modulus proposed by the author,a method for determining the deformation modulus according to the characteristic value of the foundation bearing capacity was proposed.This method has theoretical basis and can conveniently determine the deformation modulus of soil through the characteristic value of foundation bearing capacity commonly found in geological exploration reports,which can more accurately calculate foundation settlement values.The several experimental cases were calculated using different methods(plate load test method,compression modulus calculation method,standard penetration number method,bearing capacity empirical method and determining deformation modulus according to characteristic value of foundation bearing capacity method),and the feasibility of method for determining the deformation modulus according to the characteristic value of the foundation bearing capacity was preliminarily verified through the comparison of results from different methods.

关 键 词：土变形模量 地基承载力特征值 压板载荷试验 地基沉降计算 

分 类 号：TU470.3[建筑科学—结构工程]