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时间:2020-03-26
《碎裂结构边坡变形机理及治理对策研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、JournalofEngineeringGeology工程地质学报1004—9665/2009/17(3)-0317-05碎裂结构边坡变形机理及治理对策研究霍宇翔黄润秋巨能攀赵建军(成都理工大学地质灾害防治与地质环境保护国家重点实验室成都610059)摘要碎裂结构边坡稳定性受多组相交结构面控制,且受降雨、地震等多因素影响强烈,具有一定的特殊性。本文以某花岗岩碎裂结构边坡为例,在边坡的地质条件和岩体结构研究的基础上,结合施工及监测反馈信息,深入分析了边坡变形破坏模式,并根据稳定性计算结果,提出锚索、钢筋桩与排水相结合的支护方案。研究结果表
2、明:坡体内部陡倾卸荷裂缝发育形成后缘切割面,中下部滑面追踪陡缓两组结构面发展;支护措施实施后,边坡经历“5·12”地震及雨季,多点位移计监测结果表明,地震和降雨对边坡稳定性影响较大,支护措施较好地控制了边坡变形。关键词碎裂结构边坡变形机理治理对策中图分类号:TD824.71文献标识码:ADEFoRMATIoNMECHANISMANDSTABILIZATIoNMEASURESoFBRoKENGRANITICRoCKSLoPETHATEXPER皿NCEDWENCHUANEARTHQUAKEHUOYuxiangHUANGRunqiuJUNen
3、gpanZHAOJianjun(StateKeyLaboratoryofGeohazardPreventionandGeoenvironmentProtection,ChengduUniversityofTechnology-Chengdu610059)AbstractThestabilityofrockslopewitheataelastictextureiscontrolledbyjointsthatarecrossedeachother-andafectedbyterrain,rainfallandotherfactors.Thi
4、spaperpresentsacasestudyonthestabilityofagraniticrockslopewithbrokenandeataclasticstructures.Thegeologicalconditionandtherockmassstructurepropertieswerein—vestigatedindetm1.Thisstudyfurthertookintoaccountthedatathatarerevealedduringconstructionandmonito—ringoftheslope.It
5、thoroughlyanalyzedtheslopedeformationmechanismduringtheexcavating.Onthebasisoftheslopestabilityresults,itsuggestedthestabilizationmeasures.Theresuhsshowthattheslipsurfaceintopoftheslopewasformedbyunloadingcracks.Theotherslipsurfacesweredevelopedundertheefectsoftwogroupso
6、fstructuralplanes.Inparticular,themulti—pointextensometersburiedinthesloperecordedtheslopedeformationcharacteristicsduringthe5.12WenchuanEarthquakeandafterwardrailfalls.Thenafterthesupporting,theslopedeformationwasobviouslyunderthecontro1.KeywordsCataclastictexture,Broke
7、nrockmass,Slopestability,Deformationmechanism,Stabilizationmeas-ures,WenchuanEarthquake,Granity收稿日期:2008—09—08;收到修改稿日期:2009-01—13.基金项目:国家自然科学基金雅砻江水电开发联合研究基金重点资助项目(50539050)第一作者简介:霍宇翔,地质工程专业.Email:huo826@gmail.corn318JournalofEngineeringGeology工程地质学报2009至995m高程。1引言边坡位于大渡河
8、左岸,上游侧发育一条深切冲沟,自然边坡上缓(30。)下陡(50。左右),开口线以随着我国水电工程建设在西南地区快速发展,上为缓坡(15。左右)。受地形地貌限制,工程开挖形成大量高陡边坡,这些边坡主要出露澄江
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