甘肃南部坪定-化马断裂带滑坡变形特征及其防治.pdf

《甘肃南部坪定-化马断裂带滑坡变形特征及其防治.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、第32卷第12期地质通报Vo1．32．NO．122013年12月GEoLoGICALBULLETINOFCHINADec．，2013甘肃南部坪定一化马断裂带滑坡变形特征及其防厶，口杨为民，黄晓，张永双，刘廷YANGWei—min，HuangXiao，ZHANGYong—shuang，LIUTing中国地质科学院地质力学研究所．北京100081InstituteofGeomechnics，ChineseAcademyofGeologicalSciences，Beijing100081，China摘要：以坪定一化马断裂带泄流坡滑坡为例，通过野外调查和变形监测资料分

2、析，深入剖析了断裂带滑坡变形特征和形成机理．提出了断裂带滑坡的防治方法和治理措施。断裂带滑坡一般为大型一巨型滑坡，由多个次级滑坡体组成，历史上曾多次活动。变形监测资料表明，泄流坡滑坡变形目前处于匀速蠕变阶段，呈现蠕滑一塑流拉裂一土(石)流的变形破坏特点。断裂破碎带及其现今活动为滑坡长期蠕滑变形提供了物质基础，而降雨是滑坡体失稳下滑的主要诱发因素。断裂带滑坡按岩性可归类为松散堆积层滑坡。因此，对断裂带滑坡的防治应以防为主，以治为辅，即开展滑坡变形实时监测和群测群防，辅以滑坡表面排水、坡脚压载等措施，以减缓或防止泄流坡滑坡再次形成灾害。关键词：断裂带滑坡；蠕滑；降

3、雨；防治；排水中图分类号：P642．22；P694文献标志码：A文章编号：1671—2552(2013)12—1925—11YangWM，HuangX，ZhangYS，LiuT．ThedeformationcharacteristicsofthelandslidealongPingding-Huamaactivefaultzoneanditspreventionandcontro1．GeologicalBulletinofChina,2013，32(12)：1925-1935Abstract：TakingXieliupolandslidedevelopedin

4、Pingding—Huamafaultzoneasanexample，thispaperdensindetailwiththede—formationcharacteristicsandformationmechanism，andproposesthepreventionandcontrolmethodandtreatmentmeasuresonthebasisoffieldinvestigationandanalysisofdeformationmonitoringdataoffaultzonelandslides．Afaultzonelandslideis

5、generalyalargeorgiantlandslide，whichconsistsofquiteafewsecondarylandslides．Thelandslidetookplacetimeaftertimehistorically．AccordingtOthemeasurementdataobtainedinrecentyears，XieliupolandslidedeformationOCCU~ascreeping—tensilefracture(plasticflowtensilefracture)一soil(orrock)debrisflow

6、，whichisatthestageofconstantspeedcreepdeformationatpresent．Thelong—termactivityofPingding—Huamafaultandfracturezonehasprovidedmaterialbasisoflandshdesactivityforprolongedcreep—slip；however，rainfallisthemainfactorthattriggerstheselandslides，resultinginthelossofstability．Therefore，the

7、controlofthefaultzouelandslideshouldbefocusedonprevention，supplementedbytreatment．Thatis，thelandslidecontrolshouldbebasedonreal—timemonitoringandmassprediction，supplementedbydisasterpreventioncomposedoflandslidesurfacedewateringandslopetoeloading．Thecontrolcouldslowdownorpreventthel

8、andslidefrominducin