风荷载作用下输电线电塔边坡稳定性分析

Slope Stability Analysis of Transmission Line Tower under Wind Load

该文以镇江长江沿岸五峰山输电线电塔边坡为例,用毕肖普法讨论了在输电线电塔风荷载竖向力与水平力作用下,土体性质改变对边坡稳定性的影响。根据桩基布设位置、滑动面位置和桩端持力层的不同,风荷载作用下输电线电塔对边坡稳定性的影响分为三种模式:桩基础在计算产生的滑坡体内,产生的塑性区未接触到滑动面;桩基础在计算产生的滑坡体内,产生的塑性区接触到了滑动面;桩基础不在计算产生的滑坡体内。并对这三种模式进行了分析和评价。

Taking the slope of Wufengshan transmission line tower along the Yangtze River in Zhenjiang as an example,the influence by changing the soil properties to slope stability under the action of vertical and horizontal wind load forces of transmission line tower is discussed by Bishop method.According to the difference of pile foundation layout,sliding surface position and pile end bearing layer,the influence of transmission line tower on slope stability under wind load can be divided into three modes:the pile foundation in the calculated landslide,the generated plastic zone does not contact the sliding surface;the pile foundation in the calculated landslide,the generated plastic zone contacts the sliding surface;the pile foundation isn’t in the calculated landslide.The three models are analyzed and evaluated.