文章摘要
刘海波.基于地应力边界条件的复杂边坡抗滑桩支护设计研究[J].地质与勘探,2024,60(3):572-580
基于地应力边界条件的复杂边坡抗滑桩支护设计研究
Research on the design of anti-slip pile support for complex slopes based on in-situ stresses boundary conditions
  修订日期:2023-09-11
DOI:10.12134/j.dzykt.2024.03.012
中文关键词: 地应力 复杂边坡 抗滑桩 有限元 加固 安徽
英文关键词: in-situ stresses, complex slope, anti slip pile, finite element analysis, reinforcement, Anhui Province
基金项目:国家自然科学基金项目(编号:51774022)资助
作者单位E-mail
刘海波 华北科技学院建筑工程学院河北廊坊 华北科技学院理学院河北廊坊 147746573@qq.com 
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中文摘要:
      复杂边坡稳定性问题一直是岩土工程界重点研究的问题之一,提高复杂边坡安全系数的方法有很多,其中采用抗滑桩支护是常用手段之一。以安徽省某高速公路复杂边坡为研究对象,采用套孔应力解除法对该边坡岩土体进行了地应力测试,以测试结果作为有限元分析的边界条件,分别对该边坡加固前和采用抗滑桩加固后两种工况进行数值分析,得到有代表性的有限元分析结果;并对有限元的计算出位移结果和实测位移进行了对比。分析表明,未采用抗滑桩支护的边坡,会产生局部应力过分集中、整体变形和水平向位移较大、塑性区贯通等不利于边坡稳定的危险状况。采用了抗滑桩支护后,贯通的塑性区消失,边坡变形和位移减少,应力分布趋于均匀,安全系数大幅度提高。有限元计算出的位移结果和实测位移十分接近,匹合度较好,从而说明了有限元分析手段的可靠性。
英文摘要:
      The stability of complex slopes has always been one of the key research issues in the field of geotechnical engineering. There are many methods to improve the safety factor of complex slopes, among which the use of anti slip pile support is one of the commonly used methods.Taking a complex slope of a highway in Anhui Province as the research object, in-situ stress testing was conducted on the rock and soil mass of the slope using the borehole stress relief method. The test results were used as boundary conditions for finite element analysis. Numerical analysis was conducted on the two working conditions of the slope before reinforcement and after reinforcement with anti slip piles, and representative finite element analysis results were obtained; And the displacement results calculated by the finite element method were compared with the measured displacement.Analysis shows that slopes without anti slip pile support can lead to dangerous situations that are not conducive to slope stability, such as excessive concentration of local stress, large overall deformation and horizontal displacement, and the continuity of plastic zones. After the use of anti slip pile support, the?run-through?of?plastic?zone?disappears, the deformation and displacement of the slope decrease, the stress distribution tends to be uniform, and the safety factor greatly improves.The displacement results calculated by the finite element method are very close to the measured displacement, with a good fit, indicating the reliability of the finite element analysis method.
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