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ID:51216979
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页数:5页
时间:2020-03-21
《遵义县土质滑坡发育规律.pdf》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、第12卷第2期水利与建筑工程学报Vo1.12No.22014年4月JournalofWaterResourcesandArchitecturalEngineerin~Apr.,2014DOI:10.3969/j.issn.1672—1144.2014.02.029遵义县土质滑坡发育规律刘佳佳(贵州大学喀斯特环境与地质灾害防治教育部重点实验室,贵州贵阳550003)摘要:遵义县地质环境条件复杂,土质滑坡发育给遵义县带来了较大的经济损失。区内共发育滑坡109处,主要是浅表层的小型土质滑坡。在遵义县野外地质灾害调查研究的基础上,通过对县内滑坡统计分析,县内土质滑坡多分布于
2、县西北、东北、西南各乡镇。土质滑坡发育规律除与碳酸盐岩与碎屑岩情况有关外,还与碳酸盐岩、碎屑岩的分化难易程度有关;地质构造对滑坡发育具有控制作用,由于堆积层结构松散,厚度比较小;降雨能够快速渗入到坡体内部,在一定的降雨量和降雨强度下,滑坡稳定性得到降低;人类工程活动对境内土质滑坡的发育的影响主要体现在人工切坡,水电站蓄水的影响也不容小觑。关键词:遵义县;土质滑坡;发育规律;地质构造中图分类号:P642.22文献标识码:A文章编号:1672一l144(2014)o2—014I)一o5DevelopmentLawofSoilLandslidesinZunyiCounty
3、LIUJia-jia(KeyLaboratoryofMinistryofEducationforKarstEnvironmentandGeologicalDisasterPrevention,GuizhouUniversity,Guiyang,Guizhou550003,China)Abstract:BecauseofthecomplexgeologicalenvironmentconditionsinZunyiCounty,thesoillandslidedevelopmenthasbroughtgreateconomiclosstothiscounty.Ther
4、eare109landslidesinthestudyzone,whicharemainlyshallowandsmalllandslides.BasedonthefieldinvestigtionofthegeologicaldisastersandthestatisticalanalysisofthesoillandslidesinZunyiCounty,itisknownthatthesoillandslidesaremainlylocatedinthenorthwest,northeastandsouthwestofthecounty.Thedevelopm
5、entofthesoillandslidesarenotonlyrelatedtothedistributionofthecarbonaterocksandclasticrocksinthezone,butalsorelatedtothedificultdegreeoftheirdecomposition.Thegeologicalstructurehasthecontrolactiontothedevelopmentofthelandslides,andthethicknessoftheaccumulationlayerisrelativelysmallbecau
6、seofitsloosestructure.TherainfallCanfastinfiltratetotheintemaloftheslope,andinacertainrainfallamountandintensity,theslopestabilitywillbereduced.Theeffectsofhumanengineeringactivitiesonthesoillandslidedevelopmentintheterritorywouldmainlyreflectinartificialslope-cutting,inaddition,theeff
7、ectofthewaterstorageinhydropowerstationcouldnotbeunderestimated.Keywords:ZunyiCounty;soillandslide;developmentlaw;geologicalstructure明显等特点_1-4J。1引言浅层土质滑坡是滑坡中分布最为广泛、暴发频遵义县位于贵州省北部,遵义市南面,地质构造率高、持续危害性较大的地质灾害之一。其物质组发育、岩体破碎、地形地貌多变、气候条件特殊等,是成一般为次生堆积体,厚度通常小于10m,笔者在导致滑坡等地质灾害发生频繁的重要因素之一。土对遵义县1
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