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在山地场地和为提高导线悬挂高度条件下,高露头基础与常规基础比较,更容易发生倾覆失稳。建立了掏挖基础抗倾覆稳定平衡方程,根据不同露头高度基础在倾覆弯矩和水平荷载作用工况下的载荷试验结果,分析了掏挖基础承载特性和倾覆转动中心位置的变化规律.并将试验结果分析和理论研究相结合,研究了不同露头高度和埋置深度对掏挖基础抗倾覆稳定性和基础水平承载力的影响,表明露头越高掏挖基础抗倾覆能力越低.
In the mountainous area and in order to increase the height of the wire suspension, the high outcrop foundation is more prone to tipping instability than the conventional foundation. Based on the results of load test under different overturning moment and horizontal load under different outcrop height basement, the bearing capacity of excavation foundation and the change rule of the center of overturning rotation are analyzed. The results of the test and the theoretical research are combined to study the influence of different outcrop height and embedment depth on the anti-overturning stability and the basic horizontal bearing capacity of the excavated foundation, which shows that the higher the outcrop is, the lower the anti-overturning capability of the excavation foundation is.