摘要
抗滑桩是滑坡治理中常用的工程措施之一,为了充分提高抗滑桩的加固效果,其优化布置位置选择尤为重要。论文在滑坡应力水平分析基础上,以典型库岸滑坡为例,提出了一种基于滑带应力水平分布特征确定抗滑桩加固位置的方法。研究结果表明:(1)滑坡体内高应力水平区域与坡体位移较大的区域、塑性区的分布具有较好的一致性,根据应力水平分布规律可以更准确地确定滑坡的破坏类型;(2)通过12个位置抗滑桩的加固效果对比发现,抗滑桩布置在滑带应力水平较高的区域时,可以有效改善坡体内的塑性区,提高滑坡体的安全系数,达到较好的加固效果;(3)与基于变形场分布和塑性区分布等方法确定抗滑桩优化加固位置的方法相比,基于滑带应力水平分布特征的分析方法,可以准确、定量地确定滑坡的优化加固位置,从而可以充分发挥抗滑桩加固效果。相关分析思路和研究结果可为抗滑桩加固位置优化分析提供较好的依据。
Anti-slide pile is one of the common engineering measures in landslide treatment.In order to improve the reinforcement effect and optimize the location of anti-slide piles,we take a typical reservoir bank landslide as an example,analyze the stress level of the landslide,and put forward a method for determining the location of the anti-slide pile reinforcement.The method is based on the stress level distribution characteristics of the sliding zone.The research results show that:(1)The distribution of high stress level area in landslide body is in good agreement with that of large displacement area and plastic zone.According to the distribution law of stress level,the failure type of landslide can be determined more accurately.(2)When the anti-slide pile is arranged in the area with high stress level in the sliding zone,it can effectively improve the plastic zone in the slope,improve the safety factor of the landslide,and achieve better reinforcement effect.(3)Compared with the existing method of determining the optimal reinforcement position of anti-slide pile based on deformation field distribution and plastic zone distribution,the proposed method based on the distribution characteristics of the stress level of sliding zone can accurately and quantitatively determine the optimal reinforcement position of the landslide,so as to give full play to anti-slide pile reinforcement.We hope that the relevant analysis methods and research results can provide a good reference for the optimization of the anti-slide pile reinforcement position.
作者
李新哲
李涛
潘登
刘慧敏
李建林
邓华锋
LI Xinzhe;LI Tao;PAN Deng;LIU Huimin;LI Jianlin;DENG Huafeng(Key Laboratory of Geological Hazards on Three Gorges Reservoir Area(China Three Gorges University),Ministry of Education,Yichang,443002,China)
出处
《工程地质学报》
CSCD
北大核心
2021年第3期640-646,共7页
Journal of Engineering Geology
基金
国家自然科学基金(资助号:U2034203,51679127)
三峡大学2018级硕士学位论文培优基金项目(资助号:2020SSPY024).
关键词
应力水平
抗滑桩
滑坡
破坏模式
最优加固位置
Stress level
Anti-slide pile
Landslide
Failure mode
Optimal reinforcement position
