三峡库区千将坪滑坡滑带土干-湿循环条件下强度特性试验研究  

Experimental study of dry-wet circulation of Qianjiangping Landslide's unsaturated soil

作　　者：曹玲[1] 罗先启[1] 

机构地区：[1]三峡大学三峡库区地质灾害教育部重点实验室,湖北宜昌443002

出　　处：《岩土力学》2007年第S1期93-97,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金(No.50609012);湖北省自然科学基金资助项目(No.2005ABA295);湖北省教育厅重大科学研究计划资助项目(No.Z200513003);三峡大学科学基金资助项目(No.2004C03)。

摘　　要：三峡库区滑坡的失稳,主要是水库水位的升降、大气降雨和人类活动等因素的影响引起的,滑坡的滑带土在水的反复浸泡作用下,其强度降低是导致大量古滑坡复活或产生新生型滑坡的主要原因。通过对千将坪滑坡滑带土在干―湿循环试验(DWC)条件下与天然非饱和土CU试验结果比较,研究了干-湿循环条件下滑坡滑带土强度特性及其变形特性,揭示了千将坪滑坡失稳机制。For the instability landslide in the Three Gorges Reservoir region,the change of the reservoir water level,atmospheric precipitation and other factors arising from the impact of human activities will be the chief reasons. Landslide sliding zone which repeatedly immersed in water under its intensity is a large number of ancient landslide or produce new landslide in the region. Based on the slide belt Qianjiangping landslide in wet-dry cycle test(DWC) and the consolidated-undrained triaxial test(CU) of unsaturated soil under natural conditions results,studied wet-dry cycle Qianjiangping landslide conditions slippery soil strength and deformation characteristics,reveals the instability mechanism of Qianjiangping landslide.

关 键 词：非饱和土 干-湿循环 吸力 变形 抗剪强度 

分 类 号：TU411.6[建筑科学—岩土工程]