中国西部深切峡谷区某崩滑体成因机制与稳定性分析

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中图分类号：P642 文献标识码：A 文章编号：2097-5465（2026）02-0095-10

Chengdu University of Technology，Chengdu 610059，China

Abstract：Thegeologicalenvironmentinadeepcanyonareaof western Chinaiscomplex，withintense tectonicactivitiesand numerousgeologicaldisasterssuchaslandslidesandcoapses.Thecausesarediverse，andthestabilityoftheaccumulationbodies hasdrawnmuchatention.Thispaperanalyzestheenvironmentalconditionsfortheformationoflargeaccumulationbodiesandtheir deformationandfailuremodesthrough fieldgeological investigationsandgeotechnicaltests，andusesFLAC3Dtosimulatethe stabilityofacumulationbodiesunderhavyrainfall.Theresearchresultsshowthattheaccmulationbodyiscomposedofmultiple high-altitude landslide and collapse accumulation bodies，with a volume of approximately 2.9×106m3 ，and is a large-scale landslideandcollapsebody.Itsfrontedgeoverhangsthefth-evelterrace，andtheslidingbediscomposedofmixedschistand gneisicgranodiorite.Theslidingsourceareaislocatedonbothsidesoftheupperandlowerplatesof thestrike-slipfault.The formationprocessconsistsofthreestages：unloading rebound，shearsliding alongthelargestructural planeontheinclined slope， andmultipleinstabilitiestriggredbyhighintensityeventsThedeformationandfailuremodeisclasifiedas"sliding-tesile cracking type".Theacumulationbodyiscurentlystable，butundertheinfluenceof heavyrainfall，local instabilitymayour.

Keywords：largecolapse landslide body；deformation failuremode；stability；numerical simulation

0 引言

中国西部深切峡谷区发育诸多大型崩滑体，堆积体上方或堆积体下方往往分布有村落，堆积体的稳定性直接关系到村落居民的生命财产安全[1-2]。（剩余8251字）