CAJ | 학술논문

树坪古滑坡位于三峡库区内,在库水位周期性涨落作用下,滑坡土体处于饱和与非饱和动态调整状态,籍于此,根据非饱和渗流场与应力场耦合的有限元方程,应用有限元强度折减法,对库水位在不同速率变动情况下树坪古滑坡的复活机理开展了研究. 结果表明:树坪滑坡地下水位变动具有一定的滞后性,并与滑体的渗透性系数密切相关;滑坡稳定系数在水位上升时整体呈现先增大后减小的趋势,并随着变动速率的增大而增大;水位下降时整体呈现先减小后增大的趋势,并随着变动速率的增大而减小;树坪滑坡复活的临界水位升降速率为2 m/d,临界水位为降落到165 m左右.
수평고활파위우삼협고구내,재고수위주기성창락작용하,활파토체처우포화여비포화동태조정상태,적우차,근거비포화삼류장여응력장우합적유한원방정,응용유한원강도절감법,대고수위재불동속솔변동정황하수평고활파적복활궤리개전료연구. 결과표명:수평활파지하수위변동구유일정적체후성,병여활체적삼투성계수밀절상관;활파은정계수재수위상승시정체정현선증대후감소적추세,병수착변동속솔적증대이증대;수위하강시정체정현선감소후증대적추세,병수착변동속솔적증대이감소;수평활파복활적림계수위승강속솔위2 m/d,림계수위위강락도165 m좌우.
Shuping Landslide, located in Three Gorges reservoir area, is in dynamic saturated or unsaturated state due to the periodical water level fluctuation of the reservoir. Therefore, based on the finite element equations coupled with the saturated-unsaturated seepage field and stress field, the revival mechanism of Shuping Landslide under the periodical water level fluctuation with different variation rate was researched by using the FEM strength reduction method. The result indicates that the fluctuation of ground water level in the landslide has a hysteretic nature, and is closely related with the permeability of slide body;when the water level rises, the stability coefficient of landslide increases first and decreases then, and the coefficient increases with the ris-ing rate of water level;when the water level falls, the coefficient decreases first and increases later, and the coefficient decreases with the falling rate of water level;the critical water level change speed for Shuping Landslide revival is 2 m/d, and the critical fluctuation level is about falling to 165 m.