摘要
根据土力学理论建立抗拔土体极限平衡方程,基于Mohr-Coulomb屈服准则,采用规范推荐的破裂面方程,推导了输电塔原状土基础抗拔极限承载力的理论计算公式。重点探讨剪切法中计算系数A1和A2的取值特征,及其随内摩擦角Φ和基础深宽比H/D的变化规律,通过与规范(DL/T5219-2005)和技术导则(Q/DG2-T03-2007)送审专题报告进行对比分析,讨论了抗拔承载力计算可能存在的问题,得到关于系数A1和A2的结论可为工程设计提供参考。
Based on the limiting equilibrium,Mohr-Coulomb yielding criterion and the failure surface premises in accordance with technical regulation for designing foundation of transmission line,the theoretical formula for the ultimate bearing capacity of the undisturbed soil foundation is deduced.Then,the character of parameters A1 and A2is manifested with the change of Φ and H/D.The existing problems have been pointed out by comparing the results of the theoretical formula with ＂Technical Regulations＂（DL/T5219-2005） and special report in the related guide（Q/ DG2-T03-2007）.Some conclusion and suggestion on parameters A1 and A2 are useful for the design process of transmission tower foundation as reference in this paper.
出处
《华中电力》
2010年第4期26-29,共4页
Central China Electric Power
基金
中国电力顾问集团公司科技项目(DG2-T03-2007)
关键词
输电塔
原状土基础
剪切法
承载力
A1
A2
transmission tower
undisturbed soil foundation
shearing method
uplift capacity
A1
A2
