摘要
压缩模量是土力学中的一个重要概念,主要用于评价土体的压缩性以及计算地基土体的最终沉降。目前,国内外不同版本的教材或规范对压缩模量的定义或者计算公式存在着不同的形式,在教学过程及实际工程中容易产生歧义。首先分析了压缩模量的不同定义,然后基于已有教材中的一组室内压缩试验数据,探讨了两种不同计算公式的推导过程,结果表明,两种计算公式从形式上来看是不同的,其实质是一致的,只不过采用了不同的应变度量。在附加压力不是很高时,两种公式计算结果相差不大,只有在附加压力很大时,两者才出现明显不同。从服务于本科生教学的角度出发,建议教材中在推导压缩模量计算公式时采用工程应变。
The compression modulus is an important concept in the soil mechanics,which is often used to evaluate the compressibility of the soil and estimate the final settlement of foundation soil.At present,there are different types of definition or formulations of the compression modulus in different versions of textbooks or design codes domestic and abroad,which is easily to induce the ambiguity in the academic and in the engineering practice.This paper firstly analyzes the various definitions of the compression modulus,and then discusses the different derivation processes of two expressive formulas,throughout a set of one-dimensional compression test data in the existing textbooks.The results show that the two formulas are consistent in general,but different strain measures are utilized.When the applied compressive pressure is not very high,there is little difference between the results from the two formulas.Only when the applied pressive pressure is very high,there is a significant difference between them.From undergraduate education point of view,it is suggested that the engineering strain should be used in the derivation of formulas for the estimating of the compression modulus in the soil mechanics.
作者
范庆来
吴月
马思琪
刘志浩
FAN Qinglai;WU Yue;MA Siqi;LIU Zhihao(Ludong University,Yantai 264025;Yantai Three-Dimensional Geotechnical Engineering Technology Co.Ltd.,Yantai 264011)
出处
《土工基础》
2023年第2期236-240,共5页
Soil Engineering and Foundation
基金
山东省专业学位研究生教学案例库建设项目(SDYAL20168)
烟台市科技创新发展计划项目(2021XDHZ071)
鲁东大学研究生教育教学改革研究项目(JGXM1901)
山东省研究生教育教学改革研究项目(SDYJG21187)。
关键词
土力学
压缩模量
压缩试验
工程应变
孔隙比
Soil Mechanics
Compression Modulus
Compression Test
Engineering Strain
Void Ratio
