摘要
为确保夏分边坡稳定性,现场布设了4个监测点对潜在滑坡体水平位移和竖向位移进行监测分析;根据监测结果,确定了该滑坡采用分级抗滑桩的初步加固方案,利用强度折减法计算所得其稳定性系数为1.434,表明该方案能够满足工程要求.为使工程治理方案更加经济合理,建立了有限元数值模型,在土体和抗滑桩特征参数敏感性研究的基础上,制定了4种工程加固方案,通过数值模拟和强度折减法计算分析了各方案平均应力、塑性区及稳定性系数的变化规律和特点.计算所得4种方案的稳定性系数分别为1.427、1.455、1.262和1.267,均能满足工程加固要求.最后,结合工程实际并考虑边坡工程的长期稳定性,推荐方案4为该滑坡的工程治理方案.
In order to ensure the stability of Xiafen slope, four monitoring points were placed on site to monitor and analyze the horizontal and vertical displacements of the potential landslide body;according to the monitoring results, a preliminary reinforcement scheme of graded anti-slip piles was determined, and its stability coefficient was 1.434 calculated by the strength reduction method, which shows that the scheme could meet the engineering requirements.To make the reinforcement scheme more economical and reasonable, a finite element numerical model was established, and four reinforcement schemes were developed based on the sensitivity study of the characteristic parameters of soil and anti-slip pile.The stability coefficients of the four schemes are 1.427,1.455,1.262 and 1.267 respectively, and they all can meet the requirements of the project reinforcement.Finally, considering the long-term stability and the actual situation of the slope project, the 4th scheme is recommended to be used.
作者
张帮鑫
贾剑青
刘中帅
田明
王鹏
辛成平
ZHANG Bang-xin;JIA Jian-qing;LIU Zhong-shuai;TIAN Ming;WANG Peng;XIN Cheng-ping(School of Traffic and Transportation,Lanzhou Jiaotong University,Lanzhou 730070,China;ChinaMerchants Chongqing Communications Technology Research&DesigninstituteCo.,Ltd.,Chongqing400067,China;Chongqing Institute of Geology and MineralResources,Chongqing401120,China)
出处
《兰州交通大学学报》
CAS
2023年第1期9-15,共7页
Journal of Lanzhou Jiaotong University
基金
国家自然科学基金(42261029)
甘肃省科技计划资助(20YF8FA042)
甘肃省教育厅“双一流”科研重点项目(GSSYLXM-04)。
关键词
抗滑桩
强度折减法
敏感性
长期稳定性
slip-resistant piles
strength reduction method
sensitivity
long-term stability
