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What Are the Conditions for Generating Negative Skin Friction on Piles?

2017-06-16 864 0人评论

　　产生桩侧负摩阻力有哪些条件？
　　第一类情况为桩周土在自重作用下固结沉降或浸水导致土体结构破坏、强度降低而固结（湿陷）；
　　第二类情况为外界荷载作用导致桩周土固结沉降，如桩周存在软弱土层，邻近桩侧地面承受局部较大的长期荷载或大面积地面堆载（包括填土）；
　　第三类情况为因降水导致桩周土中有效应力增大而固结。

Deep Foundation Pit Slope Support Plan of Yuzhong Wencheng Plaza Project Department of the Second Company of China Railway 21st Bureau Group Successfully Passes Expert Review

Under What Circumstances Should Negative Skin Friction on Piles Be Considered?