中英西安地裂缝概况

西安地裂缝概况OverviewofXi'anGroundfissure汾渭盆地是我国新构造活动剧烈、活动形式复杂的关键地区：Weihebasinisthekeyareaofnewtectonicintensivelymovement.大同盆地剖面图太原盆地剖面图临汾盆地剖面图渭河盆地剖面图盆地持续伸展变形盆内次级块体差异运动显著盆缘及盆内活动断层活动强烈地质灾害十分发育SustainableextensivedeformationNotablesecondaryblockdifferentialmovementIntensivelymovementofactivefaultWelldevelopedgeologicaldisaster汾渭盆地是中国地裂缝灾害最发育的地区，迄今已发现地裂缝400余条，尤以西安、大同、临汾、运城等地最为典型和强烈。Fenweibasinistheareaofthatgroundfissuredisastermostdeveloped.Uptonow,therearemorethan400piecesofgroundfissureshavebeenfound,especiallythecityofXi’an,Datong,Linfeng,Yunchengarethemosttypicalandintensivelymovementarea.大同地裂缝大同地区活断层ActivefaultintheareaofDatongcitygroundfissureintheareaofDatongcity榆次地裂缝分布图GroundfissuredistributioninareaofYucicity太速运高太原清徐县地裂缝分布图GroundfissuredistributioninareaofQingxucounty,Taiyuan

万荣变电站地裂缝地坪挤压隆起山西盆地南段地裂缝分布图GroundfissuredistributioninthesouthpartofFenweibasinGroundfissureofWanrongexchangepowerstationUpheavalofgroundsurfacebycompressionF1F2三原地裂缝分布图GroundfissuredistributioninareaofSanyuancountySketchmapoftrench地裂缝平面展布特征DistributioncharacterofgroundfissureinSanyuan西安城郊区目前发现的13条地裂缝，均分布在黄土梁洼地貌范围内。地裂缝出露总长度103km，单条地裂缝出露最长11.38km，最短2～4km。地裂缝向东西两侧延伸，东过浐河，西到皂河边。Thereare13piecesofgroundfissuresdevelopedintheurbanareafofXi'anatpresent.Allfissuresdistributedwithintheloessridgeanddepressionregion,theareaisabout150km2.Totallengthofgroundfissuresisabout103km,thelongestoneisabout11.38km,theshortestoneabout2km.Thefissuresextendtowardstheeast,stretchingovertheChanheriver.Thefissuresalsotowardsthewest,reachingthebankofZaoheriver.西安地区构造地貌图TectonicandmorphologicalmapofXi’anGeologicalsectionalongsubwayNo2,Xi’ancity西安地裂缝剖面结结构特征：SectionstructureofXi’angroundfissures地裂缝主体倾向南南，倾角较陡，一一般在700以上。在剖面上的的形态一般为上宽宽下窄的楔形，向向下逐渐消失，最最深达百余米。主主干地裂缝与次级级地裂缝在剖面上上的组合形式大致致概化为以下几种种：西安地裂缝缝带剖面组组合形式图图阶梯状“y”型追踪式CombinationsectionpatternofXi’angroundfissures地裂缝地表表断坎的剖剖面形态：：分为以下3种形态：：抑俯型(a)、台台阶型(b)和台凹凹型(c)。实际上上反映了地地裂缝形成成过程中的的不同阶段段。TheshapeofthesurfacecliffofgroundfissureUp-downtypeSteptypeConcavetypeMaturitytype错断Q4底界S0(1万年)0.2m(埋深1.5m左右)错断Q3底界S1(12.8万年)2m(埋深13m左右)错断Q2底界S8(73万年)35m(埋深约75m左右)0.2m2m35m断距随深度度的变化关关系西安地裂缝缝垂直断错错特点VerticaldisplacementcharacteristicThechangeofSnapwiththedepthvariation

西影路地裂缝三维变形测量变化曲线图-0.500.000.501.001.50123456789101112月

变化量(mm)降量扭量张量ThethreedimensionaldeformationcurveofgroundfissureatXiyingroadSubsidenceshearingtensionF11地裂裂缝交警总总队探槽SketchofthetrenchcrossingF11F2地裂缝五金金厂探槽SketchofthetrenchcrossingF2建筑物受损损和破坏Thedamageofthebuildings道路受损桥梁受损桥梁错开桥面开裂地下管道破破坏地裂缝错断断翠华路供供水管道造造成突水地裂缝错断断万寿路供供水管道造造成地面塌塌陷WaterprojectingcausedbydamagepipelineofwatersupplyGroundcollapsecausedbydamagepipelineofwatersupply水的作用通通过断层加加剧地裂缝缝的活动ThewateractionintensethemovementofgroundfissurethroughfaultGeologicalsectionsubwayaongNo2,Xi’ancity西安地裂缝缝是一种内内外动力耦耦合作用形形成的地面面变形灾害害Xi’angroundfissureisonekindofgrounddeformationdisastercausedbycouplingactionofinteriorandexterioractiveforce.ThesubsidenceIsolinemap,Xi’anareaStablefoundationUpheavaluppermantleHorizontalcompressextensile甘地块青地南华块汾渭盆地Amurian地块汾渭盆地地地裂缝是一种大区区域性的地地质灾害，，这与汾渭渭盆地特殊殊的活动构构造背景有有关。汾渭盆地及及邻区活动动构造图中国大陆现现今地壳水水平运动速速度场ActivetectonicmapofFenweibasinandsurroundareaThepresentvelocityfieldofcrusthorizontalmovementofChinesecontinentThegroundfissuresdevelopedinFenweibasinistheregionalgeologicaldisasterandhasrelationshipwiththespecialactivetectonicbackground.国土资源大大调查项目目（项目编号号：200411300025）西部地区地地裂缝地面面沉降调查查与监测（分布规律律、动态监监测、成成因机理与与防治）汾渭盆地地地裂缝成因因机理与大大陆动力学学国家自然科科学基金重重点项目（项目编号号：40534021）（地质背景景、成灾动动力学）Wearenowundertakingthreecorrelationresearchprojects目前我们正正承担二个个有机联系系的国家课课题：Nationallandresourceexploreproje