框架预应力锚杆支护边坡稳定性及锚固参数灵敏度分析  

Analysis of slope stability and sensitivity of anchoring parameters in slope supported by frame prestressed anchored bar

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作  者:王邓峮 刘东岩 叶帅华[2] WANG Dengqun;LIU Dongyan;YE Shuaihua(Hefei University of Technology Design Institute(Group)Co.,Ltd.,Hefei 230000,Anhui,China;Gansu Provincial Key Laboratory of Civil Engineering Disaster Prevention and Reduction,Lanzhou University of Technology,Lanzhou 730050,Gansu,China)

机构地区:[1]合肥工业大学设计院(集团)有限公司,安徽合肥230000 [2]兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州730050

出  处:《地基处理》2024年第5期444-450,共7页Journal of Ground Improvement

摘  要:灵敏度分析对于解决土木工程中众多参数的辨识问题具有重要作用。为了研究框架预应力锚杆支护边坡锚固参数对土质边坡在动力作用下稳定性安全系数的影响以及锚固参数对安全系数灵敏度的影响,采用GeoStudio有限元软件建立黄土地区框架预应力锚杆支护边坡的计算模型,并通过采用全局差分法建立灵敏度近似计算的分析模型,用以研究各锚固参数与灵敏度之间的关系。结果表明:每一个支护参数都有一个最佳水平,可以使安全系数达到最高值;锚固参数对灵敏度的影响大小依次为锚杆水平倾角、水平间距、竖向间距以及锚杆长度。分析结果可为框架预应力锚杆支护结构的优化设计提供参考。Sensitivity analysis plays an important role in addressing numerous parameter identification in civil engineering.In order to study the influence of anchoring parameters of frame prestressed anchor supporting slope on the stability safety factor of soil slope under dynamic action and the influence of anchoring parameters on the sensitivity of safety factor,the calculation model of frame prestressed anchor supporting slope in loess area was established by using Geo-Studio finite element software.The global difference method was used to analyze the model of approximate calculation of sensitivity to study the relationship between anchoring parameters and sensitivity.The results indicate that each support parameter has an optimal level that can maximize the safety factor.The impact of anchoring parameters on sensitivity is in the following order:horizontal inclination angle,horizontal spacing,vertical spacing,and length of anchored bar.These analytical findings can provide important reference for the optimization design of structures suported by frame prestressed anchored bar.

关 键 词:框架预应力锚杆 地震作用 锚固参数 支护边坡 灵敏度 安全系数 

分 类 号:TU43[建筑科学—岩土工程]

 

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