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1、第26卷云南水力发电第2期YUNNANWATERPOWER35高压灌浆抬动监测技术研究熊德全,赵正洪,王昆(中国水电顾问集团昆明勘测设计研究院勘察分院,云南昆明650041)摘要:水电大坝及枢纽防渗处理的基本方法之一为灌注水泥浆液,随着灌浆机具及工艺的日趋成熟和完备,灌浆的压力因工程的规模及地质条件复杂等原因而大幅提高,国内相关大型水电工程的最大灌浆压力已达到5~7MPa,较大的灌浆压力一方面有利防渗帷幕体的结实耐久,另一方面对岩土层会引起次生的劈裂破坏,以及对水工结构物产生的抬动变形等危害,因此灌浆抬动监测
2、不容忽视。一般灌浆工程主要采用单点法观测30m以上的地表层灌浆抬动变形,本文以洪家渡水电站面板堆石坝趾板高压灌浆试验的分层多点监测岩层变形为主,主要介绍抬动监测方法及数据分析研究的相关资料,与水电基础加固处理工程建设同行探讨。关键词:水电站;灌浆试验;高压力;抬动变形监测;成果分析中图分类号:TV6981+1文献标识码:A文章编号:1006-3951(2010)02-0035-07TheTechnicalStudyofMonitoringofHighPressureGrouting-causedUpliftXIONGDe-quan,ZHAOZh
3、eng-hong,WANGKun(KunmingHydroelectricInvestigation,DesignandResearchInstitute,CHECC,Kunming650051,Yunnan,China)Abstract:Cementgroutinjectionisoneofthebasicseepagecontroltreatmentmethodsinconstructionofdamsandhydraulicstructuresofhydropowerprojects.Withripeningandperfectingofgroutin
4、gmachinesandtoolsaswellastechn-ologydaybyday,thegroutingpressureincreasesbyalargemarginbecauseofbothscaleandgeologicalconditionsofahydropowerprojectbecominglargerandmorecomplicated.Max.groutingpressurehasreached57MPainconstruc-tionoftherelevantlargehydropowerprojectsinChina.Thehig
5、hgroutingpressureenablesimperviouscurtainstobesolidanddurableontheonehandandcausessecondarysplittingdamagetorockandsoilformationsontheotherhand.Fur-ther,thehighgroutingpressurewouldcauseupliftdeformationofhydraulicstructures.Itisthereforenecessarytomonitorgrouting-causedupliftofahy
6、draulicstructure.Ingeneral,thesinglepointmethodisusedtomonitorover30mthickgroundsurfacelayergrouting-causedupliftdeformationingroutingworks.Bytakingtheconcretefacerock-filldamplinthhighpressuregroutingtestofHongjiaduhydropowerprojectasanexampleformonitoringofrockformationdeforma-ti
7、onusingmulti-pointinstrumentationarrangedinlayers,thispaperintroducesthemonitoringmethodofgrouting-causedupliftandrelevantinformationconcerningdataanalysisandstudyfordiscussionwiththecolleaguesengagedinfoundationconsolidationtreatmentofhydropowerprojects.Keywords:hydropowerproject;
8、groutingtest;highpressure;
