岩质基坑边坡泥化夹层的影响分析（论文）.pdf

I-I-程建设与设计 lConstruction&Des ForProject 岩 质 基 坑 边 坡 泥 化 夹 层 的 影 响 分 析 AnalysisontheImpactsoftheArgillizationIntercalation oftheRockFoundationPit 刘晓 斌 ，林 义华 (重庆川东南地质工程勘察设计院，重庆 400038) LIUXiao-bin，LIN Yi-hua (GeotechnicalInvestigation&DesignInstituteofSoutheastSichuanGeologicalTeam，Chongqing 400038，China) 【摘 要】岩质边坡中若存在外倾的泥化夹层，其稳定性差，影响坡顶、坡脚建(构)筑物的安全，因此，查明泥化夹层的空 间分布并提出合理的物理力学指标，对边坡稳定性评价和防治十分重要。论文以某工程岩质基坑边坡存在多层外倾的泥 化夹层为例，通过探井查明了泥化夹层的空间位置，采取泥化夹层样品作重塑剪切试验，并结合场地实际地质情况提供了 泥化夹层抗剪强度指标等岩土设计参数，正确评价了边坡的破坏模式，采用赤平极射投影法定性和平面滑动法定量评价 了边坡的稳定性，结合施工工序提供了安全可行的防治措施。 【Abstract】If theextravertargiUizationintercalationexists，therockslopeisoflowstability,whichwillcausethesafetyproblemson the buildings at the top and bottom of the slope．Therefore，it is necessary to find out the spatial distribution of the argillization intercalationandprovideproperphysicalandmechanicalindexeswhichareofgreatimportancetoevaluatethestabilityoftheslopeand toprevent．Thisessaytakestheextravertargillizationintercalationsofaprogramwhichexistinthe slopesoftherockfoundationpitsas anexample．Findoutthe spatialpositionsoftheargillizationintercalationbythe exploratorywel1．Take samplestodothe remoulded shear strength tests．Provide the design parameters ofthe rock and soil based on the real geological conditions and the shear strength indexes．Make a correct evaluation on the failure modes ofthe slopes．Evaluate the stability ofthe slopes by applying stereographic projection method to qualitative analysis and the planar slide m~hod to quantative analysis．Provide the safe and feasible prevention measures forthe constructionprocedures． 【关键词】泥化夹层；抗剪强度指标取值；稳