通过常规勘察手段探讨地基土基床系数  

Discussion on the Foundation Coefficient of Ground Soil Through Conventional Investigation Means

作　　者：吉咸伟 Ji Xianwei(Shanghai Yuanyi Investigation&Design Co.,Ltd.)

机构地区：[1]上海元易勘测设计有限公司,上海市200025

出　　处：《勘察科学技术》2024年第S1期12-16,共5页Site Investigation Science and Technology

摘　　要：该文简述了基床系数在工程设计中的作用,进而指出获取基床系数的几种方法:原位试验、室内试验和规范查表,并论述这些方法的优劣势。在此基础上,讨论基床系数的准确度,认为基床系数无法也不应该强调其准确度,它随着多种因素而改变。因而在勘察报告中提出的基床系数需要反映和契合土的工程力学性质。在研究规范和行业技术手册的基础上,对基床系数公式进行推演,对规范经验数值进行数据分析,提出由常规勘察手段(常规室内试验、标贯、动探、岩石抗压强度试验)提供地基土基床系数,既满足规范要求,符合手册经验,又反映岩土的工程力学差异。This paper briefly describes foundation coefficient in engineering design,points out several methods to obtain foundation coefficients:in-situ tests,indoor tests and standar lookup tables,and discusses the advantages and disadvantages of these methods.On this basis,the accuracy of the foundation coefficient is discussed.However,it is considered that the accuracy of the foundation coefficient cannot and should not be emphasized for which changes with many factors.Therefore,the foundation coefficient proposed in the geotechnical investigation report needs to reflect and conform to the engineering mechanical properties of soil.Based on the study of specifications and industry technical manuals,the formula of foundation coefficient is deduced,and the empirical values of specifications are analyzed.It is proposed that the foundation coefficient of ground soil is raised by conventional investigation means(conventional indoor tests,standard penetration tests,dynamic penetration tests,rock compressive strength tests),which not only meets the requirements of the specification,conforms to the experience of the manual,but also reflects the engineering mechanical differences of geotechnical engineering.

关 键 词：基床系数 原位试验 室内试验 常规勘察手段 

分 类 号：TU195[建筑科学—建筑理论]