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1、第45卷第5期中南大學(xué)學(xué)報(bào)(自然科學(xué)版)、,01.45NO.52014年5月JournalofCentralSouthUniversity(ScienceandTechnology)May2014基于物理模擬試驗(yàn)的庫(kù)岸滑坡沖擊涌浪肖莉麗,殷坤龍,王佳佳,劉藝梁(中國(guó)地質(zhì)大學(xué)(武漢)工程學(xué)院,湖北武漢,430074)摘要:以三峽庫(kù)區(qū)的滑坡規(guī)模和典型河道為原型,以1:200為正態(tài)相似比進(jìn)行滑坡涌浪三維物理模擬試驗(yàn)。在對(duì)比分析試驗(yàn)結(jié)果的基礎(chǔ)上,考慮滑坡涌浪的產(chǎn)生過(guò)程中發(fā)生在近源區(qū)以內(nèi)的水舌和首浪2種水體雍高,并分別闡述兩者的特征和區(qū)別,完善沖擊涌浪的概
2、念。將水舌的最大高度和水舌長(zhǎng)度作為2個(gè)特征量,分別運(yùn)用方差分析法和邏輯回歸分析法,得出其影響因素的顯著性并擬合經(jīng)驗(yàn)公式;以拋物線型作為水舌運(yùn)動(dòng)的軌跡方程,在已知水舌高度和水舌長(zhǎng)度的情況下,預(yù)測(cè)水舌拍打到一定寬度河道對(duì)岸的高度。以大堰塘滑坡和千將坪滑坡涌浪分析為例,對(duì)比本文沖擊涌浪公式和潘家錚公式。計(jì)算結(jié)果表明:潘家錚公式計(jì)算結(jié)果較首浪高度偏大,較水舌高度偏??;而本文公式計(jì)算的沖擊涌浪高度以及抵達(dá)至對(duì)岸的爬坡浪高度與實(shí)際情況較一致,充分驗(yàn)證了應(yīng)用本文公式進(jìn)行三峽庫(kù)區(qū)庫(kù)岸滑坡涌浪預(yù)測(cè)分析具有較好的適應(yīng)性和較高的準(zhǔn)確性。關(guān)鍵詞:庫(kù)岸滑坡:沖擊涌浪;水舌
3、;首浪;潘家錚公式中圖分類(lèi)號(hào):P64文獻(xiàn)標(biāo)志碼:A文章編號(hào):1672—72O7f2014)05—1618-09ImpulsewavegeneratedbyreservoirlandslidesbasedonphysicalmodelexperimentsXIAOLili,YINKunlong,WANGJiajia,LIUYiliang(FacultyofEngineering,ChinaUniversityofGeosciences(Wuhan),Wuhan430074,China)Abstract:Thethreedimensionalexpe
4、rimentoflandslidetriggeredwaveswasconductedbymodelinglandslidesandariverchannelinThreeGorgesReservoi~andthesimilarityratiois1:200innorma1.Basedontheexperimentdata,thecharacteristicsofbothwatertongueandinitialwaveduringthegenerationofthewavesintheneat"sourcefieldwereconsidered
5、,andtheconceptofimpulsewavewasdiscussed.Takingthemaxwatertongueheightandthemaxdistance(maximumhorizondistancefromtheentrypointtothehighestwatertonguepoint)todescribewatertongue’Sshapeandmovement,thevarianceanalysismethodandmultiplelogisticregressionanalysismethodwereusedtoana
6、lyzethesignificanceofinfluencefactorsandfitformularespectively.Afteranalyzingthemechanicsofwatertongue’Smovement,aparabolaequ~ionwasapprovedasthemotionprofileofthewatertongue.thenthe1lighestpointontheoppositehilloftheriverthatthewatertongueflytoimpactwaspredicted.Takingthealr
7、eadyexistingDayantanglandslideonQingjiangRiverandQianjiangpinglandslideinthreegorgesreservoirforexample,themaxwatertongueheight,initialwaveheightandthecalculationheightbyPanjiazhengformulawerecompared.TheresultsshowthatthewaveheightcalculatedbyPanjiazhengformulaishigherthanth
8、einitialwaveheightandlowerthanthemaxwatertongueheightastolandslidesi