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时间:2019-05-25
《基于灌浆前、后波速变化的岩体固结灌浆效果分析》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、第31卷第3期岩石力学与工程学报Vol.31No.32012年3月ChineseJournalofRockMechanicsandEngineeringMarch,2012基于灌浆前、后波速变化的岩体固结灌浆效果分析1,21,21,21,21,2张文举,卢文波,陈明,严鹏,周创兵(1.武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072;2.武汉大学水工岩石力学教育部重点实验室,湖北武汉430072)摘要:基于20多个大型水利水电工程固结灌浆检测资料,分别对断层破碎带、风化及开挖影响区等不同条件岩体固结灌浆前、
2、后波速的变化进行分析,建立固结灌浆后岩体波速提高率与灌浆前岩体波速之间的关系。同时,对波速变化与变形参数之间的关系进行探讨,并与瀑布沟水电站进水塔基础固结灌浆试验结果进行比较。结果表明:待灌浆岩体自身的可灌性是固结效果的决定性因素;不同工程条件岩体具有相对应的波速提高率范围,置信水平为95%条件下,断层破碎带、风化岩体和开挖影响区岩体波速提高率范围分别为14%~38%,10%~25%和6%~16%;波速提高率与灌浆前岩体波速之间的关系可以用来对岩体固结灌浆效果进行预测。关键词:水利工程;坝基;固结灌浆;波速提高率;可灌性中
3、图分类号:TV33文献标识码:A文章编号:1000–6915(2012)03–0469–10ANALYSISOFCONSOLIDATIONGROUTINGEFFECTOFROCKMASSBASEDONCOMPARISONOFWAVEVELOCITYBEFOREANDAFTERGROUTING1,21,21,21,21,2ZHANGWenju,LUWenbo,CHENMing,YANPeng,ZHOUChuangbing(1.StateKeyLaboratoryofWaterResourcesandHydropowerEng
4、ineeringScience,WuhanUniversity,Wuhan,Hubei430072,China;2.KeyLaboratoryofRockMechanicsinHydraulicStructuralEngineering,MinistryofEducation,WuhanUniversity,Wuhan,Hubei430072,China)Abstract:Basedonthedetectiondataofmorethantwentylarge-scalehydropowerprojects,thewave
5、velocitychangesbeforeandafterconsolidationgroutingofrockmassesunderdifferentconditionsoffaultfracturezone,weatheredzone,andexcavationeffectingzoneareanalyzed;andtherelationshipbetweentheincreasingrateofwavevelocityaftergroutingandthewavevelocitybeforegroutingisest
6、ablished.Moreover,therelationshipbetweenchangeofwavevelocityanddeformationparametersofrockmassisdiscussed.AndthecomparisonbetweendetectiondataandtestresultsofconsolidationgroutingforfoundationofintaketowerinPubugouhydropowerstationiscarriedout.Theresultsshowthat:(
7、1)Thegroutabilityofrockmassisthedecisivefactorofconsolidationgroutingeffect.(2)Differentrockmasseshavetheircorrespondingfixedrangesofincreasingrateofwavevelocity.Underconfidenceintervalof95%,therangesofincreasingrateofwavevelocityoffaultfracturezone,weatheredzonea
8、ndexcavationeffectingzoneare14%–38%,10%–25%and6%–16%,respectively.(3)Therelationshipbetweenincreasingrateofwavevelocityandwavevelocitybeforegroutingcanb
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