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1、第35卷第8期人民黃河Vo1.35.No.82013年8月YELLOWRIVERAug.,2013【水利水電工程】黏土斜心墻土石壩穩(wěn)定性影響因素分析嗨喬娟,張立仁,姚濤(1.三峽大學(xué)科技學(xué)院,湖北宜昌443002;2.中國(guó)水利水電第七工程局有限公司,四川成都610081)摘要:以具體工程實(shí)例為研究對(duì)象,研究了黏土斜心墻防滲體在壩體中位置、上游坡度、滲透系數(shù)變化對(duì)斜心墻土石壩滲流和壩坡穩(wěn)定的影響,以及壩高和黏土斜心墻高對(duì)壩體滲流及穩(wěn)定性的影響,結(jié)果表明:斜心墻在壩殼內(nèi)的位置、上游坡度和壩高對(duì)壩體滲透穩(wěn)定的影響甚微,但斜心墻滲透系數(shù)對(duì)壩體滲透穩(wěn)定的影響較大,是影響壩體滲透
2、穩(wěn)定的關(guān)鍵因素;壩高對(duì)上游壩坡穩(wěn)定的影響幅度相對(duì)較大,是影響上游壩坡穩(wěn)定的關(guān)鍵因素,斜心墻在壩殼內(nèi)的位置、上游坡度、滲透系數(shù)對(duì)上游壩坡穩(wěn)定的影響甚微;斜心墻在壩殼內(nèi)的位置、上游坡度、滲透系數(shù)和壩高4組參數(shù)的變化對(duì)下游壩坡穩(wěn)定安全系數(shù)雖然有影響,但影響甚微。關(guān)鍵詞:斜心墻;滲透系數(shù);坡度;安全系數(shù);壩坡穩(wěn)定中圖分類號(hào):TV641.4文獻(xiàn)標(biāo)志碼:Adoi:10.3969/j.issn.1000—1379.2013.08.027AnalysisonInfluencingFactorsofStabilitytotheDesignofClaySoilSlopingCoreEar
3、th.RockDamQIAOJuan,ZHANGLi—ten,YA0Tao(1.CollegeofScienceandTechnology,ChinaThreeGorgesUniversity,Yichang443002,China;2.SinohydroBureau7C0.Ltd,Chengdu610081,China)Abstract:Thearticletookaspecificprojectastheobject,andresearchedthechangeregulationsoftheclaysoilslopingcoreearth—rockdam’Sse
4、epageandslopestabilityinducedbythepositioninthedamoftheclayslopingcore,thesloperatiooftheupriveroftheclayslopingcore,thehy—draulieconductivityoftheclayslopingcore,theheightoftheclayslopingcore,andtheheightofthedam.Theresultsshowthat:a)Asfarastheseepagestabilityofdamisconcemed,theinfluen
5、ceoftheclayslopingcore’positioninthedam,thesloperatiooftheupriveroftheclayslopingcore,andtheheightofthedamtoitislighter,buttheinfluenceoftheclayslopingcore’Shydraulicconductivitytoitismoreandalsocanbetakenasthekeyfactor.b)Asfarasthestabilityoftheupriverslopeisconcerned,theinfluenceofthe
6、dam’Sheighttoitismoreandcanbetakenasthekeyfactor,andtheinfluenceoftheclayslopingcore’Spositioninthedam,theupriversloperatiooftheclayslopingcore,andtheclayslopingcore’Shydraulicconductivitytoitislighter.C)Asfarasthestabilityofthedownriverslopeisconcerned,theinfluenceoftheclayslopingcore’
7、spositioninthedam,theupriversloperatiooftheclayslopingcore,theclayslopingcore’Shydraulicconductivity,andthedam’Sheighttoitiscertainbutlighter.Keywords:slopingcore;hydraulicconductivity;slope;safetycoeficient;stabilityofthedamslope土質(zhì)防滲體斜心墻壩是20世紀(jì)中期以來(lái)新興的一種土石定,不具備指導(dǎo)性、規(guī)范性。針對(duì)這一現(xiàn)狀,筆者以