水位下降条件下土钉加固土坡破坏特性研究

发布时间：2018-03-01 00:12

本文关键词： 水位下降土钉加固土坡离心模型试验变形特性破坏机制　出处：《岩土力学》2016年S2期 　论文类型：期刊论文

【摘要】：水位下降是导致滑坡的重要原因之一,而土钉是加固土坡的有效手段。进行离心模型试验,再现了水位下降时土钉加固土坡的变形和破坏过程,测量了土坡的位移变化。试验结果表明,水位下降条件下土钉加固土坡的破坏模式以绕钉破坏为主,滑裂面从坡顶逐渐向下发展至坡面;土钉加固土坡的破坏过程与变形局部化过程表现出显著的耦合变化;土钉加固机制主要表现为通过土钉与坡体的相互作用,减小土坡的变形和变形局部化程度,从而提高土坡的稳定性。增加土钉长度使得滑裂面向坡内部移动,显著减小土坡的变形及变形局部化程度,从而提高了土坡安全性。
[Abstract]:The decline of water level is one of the important causes of landslide, and soil nailing is an effective means to reinforce soil slope. The centrifuge model test is carried out to reproduce the deformation and failure process of soil nailing when the water level drops. The test results show that the failure mode of soil nailing strengthened soil slope is mainly around nail failure, and the sliding crack surface gradually develops from the top of the slope to the slope surface. The failure process and deformation localization process of soil nailing reinforce soil slope show significant coupling change, the mechanism of soil nailing reinforcement mainly shows that through the interaction between soil nailing and slope body, the deformation and deformation localization degree of soil slope can be reduced. Thus, the stability of soil slope is improved, and the sliding crack is moved to the interior of the slope by increasing the length of soil nailing, and the deformation and the degree of deformation localization of the soil slope are significantly reduced, thus improving the safety of the soil slope.
【作者单位】：清华大学水沙科学与水利水电工程国家重点实验室;
【基金】：国家自然科学基金(No.51479096) 清华大学自主科研计划(No.20161080105)~~
【分类号】：P642.22;TV697.3

【相似文献】