摘要
Abstract
In this study,four influencing parameters,namely,uniaxial compressive strength of rock mass Rc,depth of pile embedded in rock hr,slope angle θ,and pile diameter Dp,were selected.In addition,each influencing factor was set at five levels.Based on the Taguchi orthogonal test method,25 foundations of rock-socketed piles on a sloping ground of rock mass,with the aforementioned four factors and the five levels were designed.The finite element numerical simulation method was used to calculate the lateral load-displacement characteristics of each experimental foundation.The lateral load-displacement curve of each experimental foundation was achieved.Using a lateral displacement of 10 mm as a criterion,the ultimate lateral bearing capacity of each test foundation was determined.The influence trends of Rc,hr,Dp,and θ on the ultimate lateral bearing capacity of foundations were investigated by using signal-to-noise ratio analysis and analysis of variance methods.In addition,the significance level of each factor was tested.The results indicate that the sensitivity of the influencing factors on the lateral bearing capacity of rock-socketed piles on rock slopes was Dp,θ,Rc,hr by a descending order.As a significant influencing factor,Dp has the most significant impact.Both Rc and hr were not the significant influencing factors.The lateral ultimate bearing capacity of rock socketed piles on rocky slopes increased with the increase of Dp,and decreased while θ increased.When the uniaxial compressive strength of the rock mass around the pile was close to the that of the concrete of the pile,the combined bearing effect was the best,thus effectively improving the lateral bearing performance of rock socketed piles on rock slopes.The effect of increasing hr on a lateral bearing capacity of rock socketed pile on rock slopes was limited.关键词
输电线路/斜坡/嵌岩桩/水平承载性能/Taguchi方法/正交试验Key words
transmission line/sloping ground/rock-socketed pile/lateral load bearing capacity/taguchi method/orthogonal experiment分类
地质学
