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1、水利水電技術(shù)第45卷2014年第9期小浪底水庫土石壩斜心墻應(yīng)力監(jiān)測(cè)與分析喻和平1，張聰1，張貴金1，梁經(jīng)緯2，袁明明1，陳熙源1(1．長(zhǎng)沙理工大學(xué)水利工程學(xué)院，湖南長(zhǎng)沙410114；2．河海大學(xué)土木與交通學(xué)院，江蘇南京210098)摘要：以小浪底水庫土石壩斜心墻應(yīng)力監(jiān)測(cè)資料為基礎(chǔ)，對(duì)其斜心墻孔隙水壓力、土壓力及拱效應(yīng)進(jìn)行探討。分析表明：該斜心墻孔隙水壓力受施工、防滲料等影響，與庫水位變化規(guī)律存在一致、滯后及不一致三種情況。同時(shí)，其土壓力變化分為土壓力上升期、土體快速固結(jié)期(土壓力下降期)及土壓力隨庫水位有規(guī)律變化期三個(gè)階段，越靠近斜心墻上游，三個(gè)階段的變化越明顯，越靠近斜心
2、墻下游，三個(gè)階段的變化越不明顯。而且，斜心墻拱效應(yīng)從上游到下游依次減小，在運(yùn)行初期增大，之后其系數(shù)變化與庫水位變化正相關(guān)，測(cè)點(diǎn)越往下游，年變幅越小。關(guān)鍵詞：小浪底水庫；土石壩；斜心墻；應(yīng)力監(jiān)測(cè)；孔隙水壓力；土壓力；拱效應(yīng)中圖分類號(hào)：TV698．11文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1000-0860(2014)09—0030—05StressmonitoringandanalysisoHclaycore-wallinearth-rockf'dldamofXiaolangdiProjectYUHepin91，ZHANGCon91，ZHANGGuijinl，LIANGJingwei2，Y
3、UANMingmin91，CHENXiyuanl(1．SchoolofHydraulicEngineering，ChangshaUniversityofScienceandTechnology，Changsha410114，Hunan，China；2．CollegeofCivilandTransportationEngineering，HohaiUniversity，Nanjing210098，Jiangsu，China)Abstract：Basedonthestressmonitoringdataoftheinclinedcore-wallintheearth—roekf
4、illdamofXiaolangdiReservoir，theporewaterpressure．earthpressureandarchingeffectoftheinclinedcore．wallarestudiedherein．Theanalysisshowsthatundertheim—pactsfromconstruction，anti．seepagematerials，etc．，threecasesarethereforthechanginglawbetweenboththeporewaterpres。sureoftheinclinedcore．wallandt
5、hereservoirwaterlevel，i．e．consistence，hysteresisandinconsistence．Meanwhile，thechangeofitsearthpressureisdividedintothreestages．i．e．theearthpressurerisingperiod，therapidearthconsolidationperiod(earthpressuredecliningperiod)andtheperiodoftheregularchangeoftheearthpressurealongwiththereservoi
6、rwaterlevel．Sofarasthechangesofthethreestagesayeconcerned，theclosertotheupstreamoftheinclinedcore—wall，themoreevidentthechangesofthethreestagesayetobe：theclosertothedownstreamoftheinclinedcore—wall，tllemoreunevidentthechangesofthethreestagesaretobe．Furthermore．t}】learchingeffectoftheinclin
7、edCOre．wallissuccessivelydecreasedfromtheupstreamtothedownstreamandthenincreasedintheearlyperiodoftheoperation；thereafter，thechangeofitscoefficientispositivelycorrelatedtothechangeofthereservoirwaterlevel．whileforthemonitoringpoint，theIEtoreclosertothedownstre
