CAJ | 학술논문

针对岩质节理边坡，采用UDEC离散单元法中水力全耦合分析模型，研究了地下水位变化时，在渗流-应力耦合作用下，边坡应力、渗流变化的过程以及渗流作用下边坡的位移分布和破坏形式。研究结果表明：随着地下水位的升高，主应力迹线发生偏转的范围增大，相应的最大主应力增大；水位的升高导致节理张开度增大，进而坡内节理中的渗流流量增大，最大孔隙水压力呈线性增大；渗流作用下，位移等值线沿节理呈块状分布，当岩质节理边坡应力与渗流不能平衡时，坡面上节理切割形成的三角形块体在重力和孔隙水压力作用下顺坡面向下滑，边坡发生破坏。
침대암질절리변파，채용UDEC리산단원법중수력전우합분석모형，연구료지하수위변화시，재삼류-응력우합작용하，변파응력、삼류변화적과정이급삼류작용하변파적위이분포화파배형식。연구결과표명：수착지하수위적승고，주응력적선발생편전적범위증대，상응적최대주응력증대；수위적승고도치절리장개도증대，진이파내절리중적삼류류량증대，최대공극수압력정선성증대；삼류작용하，위이등치선연절리정괴상분포，당암질절리변파응력여삼류불능평형시，파면상절리절할형성적삼각형괴체재중력화공극수압력작용하순파면향하활，변파발생파배。
The hydro-mechanical model based on the discrete element method in UDEC software was utilized to discuss the chanfe of stress and seepafe,displacement distribution and failure of fractured rock slope subJected to the fluctuation of water level. The results show that the scope of the main stress trace deflection develops and the correspondinf maximum principal stress increases with the risinf of underfround water level. And the Joints openinf caused by the risinf of water level leads to seepafe flow,flow speed and the maximum pore water pressure increasinf. The dis-placement develops alonf Joints and the trianfular rock block on the surface of the slope formed by Joints fall down finally under the effect of fravity and pore water pressure when the Joint rock mass slope stress and seepafe can not balance.