交界面形态特征对边坡滑移面的影响研究

THE STUDY FOR THE INFLUENCE OF INTERFACE MORPHOLOGICAL CHARACTERISTICS ON SLIP PLANE OF SLOPES

二元结构边坡中交界面形态特征对边坡潜在滑移面位置及型式影响较大。交界面形态特征包括表面形态及交界面与边坡坡面之间的空间交接关系,本文通过数值模拟再现了交界面形态特征对二元结构边坡潜在滑移面位置及滑面型式的影响。研究结果表明:交界面与边坡坡面之间的空间交接关系一定时,交界面表面形态越光滑平直,二元结构边坡潜在滑移面位置受交界面的控制越大,滑移面沿着交界面滑动的可能越大;当上交界面一定(在圆弧下方)时,随交界面表面粗糙度的增大,上部滑移面从沿着交界面发生破坏转变成上部发生旋转滑移,下部沿着交界面破坏,滑移面的型式由"折线"型变成"圆弧+直线"型;分析讨论了当下交界面一定时,上交界面型式与摩擦系数对潜在滑移面位置的影响。

The double-decked slopes interface morphological characteristics have great impact on the slope of potential slip plane location and type. Interface morphological characteristics include surface morphological and the spatial transfer relationship between interface and slope surface, this paper recreated the effects of the interface morphological characteristics to potential slip plane location and type of double-decked slopes by numerical simulation. The results show that： when the spatial transfer relationship between interface and slope surface is certain, the more smooth and fiat of interface, the greater con- trol to potential slip plane location and type of double-decked slopes of interface, the more possibility of sliding surface along the interface; When the upper interface（ at the bottom of the arc） is certain, along with the increase of interface roughness, the upper slip plane changes broken down from the interface into the upper rotary sliding, The lower part is destroyed along the interface, the type of slip plane changes from ＂line＂ type to ＂arc ＋ line＂ type; The paper analyzed and discussed the impact of the upper interface type and friction coefficient to potential slip plane, when the lower interface is certain.