摘要
为准确计算地基的沉降量,在总结已有研究成果的基础上,提出一种基于原状土的修正割线模量法。通过对传统割线模量法的理论进行修正,提出修正系数α概念,该系数的大小取决于土体初始割线模量和其自身受到自重应力的大小,且对于单一均质地基,该系数呈现逐渐减小的趋势。最后依据实际工程,应用分层总和法确定地基的沉降量。经曲线、割线模量法和修正割线模量法的计算结果与实际观测结果比较分析,表明修正割线模量法所得结果与实际观测值更为接近,验证了该方法的可靠性。
In order to calculate the settlement of foundation accurately, an undisturbed-soil modified secant modulus method was putted forward on the basis of the existing research results. The theory of traditional secant modulus method was modified by putting forward the concept of modification factor a. The value of a is decided by the gravity stress and original secant modulus of the soil, and it decreases with depth increasing for the simply even soil foundation. The layer wise summation method was used to compute the settlement of foundation according to actual project. Through the comparison of the results obtained with the ε-p curve method, the traditional secant modulus method and the modified secant modulus method, the results gained by the modified secant modulus method close to the observed results of an undisturbed-soil soft foundation. This indicates that the modified secant modulus method is reliable.
出处
《公路交通科技》
CAS
CSCD
北大核心
2008年第9期58-62,共5页
Journal of Highway and Transportation Research and Development
基金
交通部西部交通建设科技项目资助(200131800019)
关键词
道路工程
修正系数
压缩试验
割线模量
沉降分析
road engineering
modification factor
compression test
secant modulus
settlement analysis
