饱水状态下根基质复合体整体稳定性数值模拟研究

Numerical analysis of the root-matrix composite body stability under different saturation conditions

植生基质喷播技术是岩质边坡生态重建的有效技术之一,其整体稳定性受降雨影响显著,为研究降雨条件下根-基质复合体的整体稳定性,利用有限元软件PLAXIS模拟根-基质复合体在自然与饱水状态下的整体稳定性。计算结果表明:在自然与饱水状态下,边坡坡顶根-基质复合体与边坡接触区域水平位移的最大值分别为2.69mm和4.95mm;饱水状态下,根-基质复合体与边坡接触区域塑性区面积较自然状态下明显增大;且在边坡坡顶根-基质复合体与边坡接触区域更易发生导致根-基质复合体整体坍塌的张拉破坏。

Plant Growing Medium Spraying Technology is one of the effective techniques of rock slope ecological reconstruction and its overall stability was significantly affected by rainfall. In order to study the overall stability of root-matrix composite body under the condition of rain, the finite element software PLAXIS was employed to simulate the overall stability of root-matrix composite body in the natural state of water saturation. The re- suits show that in the natural state of water and saturated, the horizontal displacement of contact area between the slope crest root-matrix composite body and the slope were 2.69mm and 4. 95mm; in the state of full water, the plastic area of the contact area between the root-matrix composite body and the slope obviously increases than that in the natural state; in the state of full water, the tension destruction leading to the complete fall of the root-matrix composite body appears easily in the contact area be- tween the slope crest root-matrix composite body and the slope.