基于离散元的顺层岩质边坡加固及稳定性分析

Analysis on Reinforcement and Stability of Bedding Rock Slope Based on Discrete Element

摘要:

为研究顺层岩质边坡加固机理及稳定性问题，基于离散元方法，利用FLAC 3D软件建立二维模型，对岩体参数敏感性进行了分析，同时得出抗滑桩加固机理。主要得到以下结论：岩层倾角、坡角、内摩擦角和黏聚力对顺层岩质边坡稳定性影响显著，边坡安全系数对坡角和内摩擦角的改变更为敏感；内摩擦角以及黏聚力的增大会导致边坡抗剪强度增大，使抗滑力大于下滑力，进而使顺层岩质边坡安全系数增大；通过研究抗滑桩的布设以及桩间距，发现桩间距为2D~3.5D时，桩位5号时为最优布设位。

Abstract:

To study the reinforcement mechanism and stability of bedding rock slopes, based on discrete element method, a two-dimensional model is established by FLAC 3D software to analyze the sensitivity of rock mass parameters, and the reinforcement mechanism of anti-slide piles is obtained. The main conclusions are that rock slope inclination, slope angle, internal friction angle and cohesive force have the significant effects on the stability of bedding rock slope. The slope safety factor is more sensitive to changes of slope angle and internal friction angle. The increase of internal friction angle and cohesive force will lead to the increase of slope shear strength, which will make the anti-sliding force greater than the sliding force, and then increase the safety factor of bedding rock slope. By studying the layout of anti-sliding piles and the distance between piles, it is found that when the pile spacing is 2D~3.5D, the pile position No.5 is the optimal layout position.