原状土基础抗拔极限承载力计算分析新方法  

A New Method for Calculating the Uplift Ultimate Capacity of Undisturbed Soil Foundation

作　　者：曾二贤[1] 王开明[1] 廖文炜[1] 尹鹏[2] 

机构地区：[1]中南电力设计院,武汉市430071 [2]中国电力工程顾问集团公司,北京市100120

出　　处：《电力建设》2010年第6期11-14,共4页Electric Power Construction

基　　金：中国电力工程顾问集团公司科技项目(DG2-T03-2007)

摘　　要：基于DL/T 5219—2005《架空送电线路基础设计技术规范》推荐的圆弧回转破裂面方程,利用极限平衡法和Mohr-Column屈服理论,推导提出了一种输电线路原状土基础抗拔极限承载力的理论计算新方法,采用Matlab语言编写了相应的数值计算程序。通过室内模型试验、现场试验和目前规范算法及剪切法等手段对新算法进行比较和验证分析。结果表明:新算法能相对准确地计算和预测原状土基础抗拔承载力的实际情况。A new method for calculating the uplift ultimate capacity of undisturbed soil foundation is deduced and presented based on the limit equilibrium theory,Mohr-Column yielding criterion and the circular failure surface equations recommended by the standard DL/T 5219—2005 ＂Technical specification for foundation design of overhead transmission line＂.A corresponding numerical computation program is written with the language Matlab.Comparison and verification is performed by the lab modeling tests,in-situ test and other theoretical calculating methods,which indicates that this new method is able to accurately calculate and predict the uplift capacity of undisturbed soil foundations.

关 键 词：输电线路 原状土基础 抗拔承载力 破裂面 极限平衡法 数值计算 

分 类 号：TM75[电气工程—电力系统及自动化] TU432[建筑科学—岩土工程]