《架空送电线路基础设计技术规定》中基础抗拔剪切法计算参数A_1和A_2的研究

Study on Parameters A_1 and A_2 in Anti-uplift Shearing Method in"Technical Regulations on Overhead Line Foundation Design"

针对规范DL/T5219—2005中通用公式"剪切法"的计算参数A1和A2的取值问题,文章根据抗拔土体极限抗拔承载力计算理论公式进行归一化处理后得到对应于规范DL/T5219—2005中"剪切法"的计算参数A1和A2的公式。将相同设计条件下的A1和A2理论值、DL/T5219—2005中通用公式A1和A2的计算值、DL/T5219—2005中A1和A2的曲线图值相互之间进行了对比分析,指出了不同计算方法下"剪切法"计算参数A1和A2的异同点。研究成果为解决目前输电线路杆塔基础抗拔稳定性"剪切法"计算参数A1和A2的取值难题提供了一种有效途经。

Aiming at the value setting of parameters A1 and A2 in general formula for shear method in DL/T5219-2005,the normalized formulae for A1 and A2 corresponding to DL/T5219-2005 are derived based on theoretical equations of anti-uplift soil limit load bearing capability.Comparisons among theoretical values of A1 and A2,calculated A1 and A2 using general equations in DL/T5219-2005,and A1 and A2 curves in DL/T5219-2005 are performed.The similarities and differences between different methods are identified.This research provides an effective means to value settings of A1 and A2in foundation stability calculation.