人民长江
人民長江
인민장강
YANGTZE RIVER
2014年
6期
20-23
,共4页
张国强%宋斌%周述达%翁建良%阳云华
張國彊%宋斌%週述達%翁建良%暘雲華
장국강%송빈%주술체%옹건량%양운화
膨胀土边坡%滑坡成因%稳定分析%南水北调中线工程
膨脹土邊坡%滑坡成因%穩定分析%南水北調中線工程
팽창토변파%활파성인%은정분석%남수북조중선공정
expansive soil slope%landslide genesis%stability analysis%Middle Route Project of South-to-North Water Di-
南水北调总干渠所涉及的膨胀土渠段出现不同规模的滑坡损害,为此对滑坡形态与成因进行了调查分析。从槽样开挖揭示情况看,卸荷松驰、裂隙贯通、降水下渗软化、沿缓倾角蠕变等是滑坡形成的外因。而缓倾角裂隙密集带、沉积界面和岩性界面等因素构成滑坡的外因。采用刚体极限平衡方法和裂隙组合网格搜索方式,对滑坡实例进行了对比分析,表明所应用的边坡稳定分析模型是合理的。
南水北調總榦渠所涉及的膨脹土渠段齣現不同規模的滑坡損害,為此對滑坡形態與成因進行瞭調查分析。從槽樣開挖揭示情況看,卸荷鬆馳、裂隙貫通、降水下滲軟化、沿緩傾角蠕變等是滑坡形成的外因。而緩傾角裂隙密集帶、沉積界麵和巖性界麵等因素構成滑坡的外因。採用剛體極限平衡方法和裂隙組閤網格搜索方式,對滑坡實例進行瞭對比分析,錶明所應用的邊坡穩定分析模型是閤理的。
남수북조총간거소섭급적팽창토거단출현불동규모적활파손해,위차대활파형태여성인진행료조사분석。종조양개알게시정황간,사하송치、렬극관통、강수하삼연화、연완경각연변등시활파형성적외인。이완경각렬극밀집대、침적계면화암성계면등인소구성활파적외인。채용강체겁한평형방법화렬극조합망격수색방식,대활파실례진행료대비분석,표명소응용적변파은정분석모형시합리적。
Various scaled landslide of expansive soil channel slope frequently occurred in the construction of Middle Route Pro-ject of South-to-North Water Diversion, so it is necessary to conduct investigation aiming at the landslide genesis and configu-ration. From the revelation of excavation, it is concluded that the external causes of slope landslide are excavation unloading, co-alescence of fissure, infiltration of rain, creep along gentle direction, and the internal causes are fissures concentration belt, dep-osition interfaces as well as lithology interfaces. The channel slope stability analysis is implemented using rigid limited equilibri-um method and grid search modes considering fissure combination, the calculation results show that the presented slope stability method is reasonable.