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开采形成的矿山岩质高陡边坡,造成山体缺损、水土流失、生态破坏,容易产生边坡失稳、崩塌滑落等地质灾害,急需进行生态修复治理。本文以北京市西郊千灵山生态修复岩质高陡边坡为例,根据地质雷达实测剖面分析及室内试验得到的岩体内部结构信息和岩石力学参数,建立了生态边坡的地质力学模型,并用有限元强度折减法对千灵山岩质高陡边坡生态修复前后的稳定性进行了模拟计算。结果表明,非降雨、降雨(饱水)条件下自然岩石边坡和生态修复后的边坡其安全系数分别为17、12.5、5、2;边坡变形以坡脚和生态带区域的中下部位最大,边坡潜在滑动面主要沿坡脚45°方向上扩展。因此,岩石边坡坡脚和生态带区域的中下部位应是重点加固区,需通过锚杆加固和有效排水对之进行处理。
Mining the formation of high rocky steep slopes, resulting in mountain damage, soil erosion, ecological damage, prone to slope instability, collapse and other geological disasters, the urgent need for ecological restoration and management. In this paper, the ecological restoration of rocky high steep slope in Qianling Mountain, western suburbs of Beijing, is taken as an example. According to the analysis of the measured data of the geological radar and the information about the internal structure of the rock mass obtained from laboratory tests, the geomechanical model of ecological slope is established, The stability of Qianlingshan rock slope before and after ecological restoration was simulated by finite element strength reduction method. The results show that the safety coefficients of natural rock slope and ecological restoration slope are 17, 12.5, 5 and 2 respectively under the condition of non-rainfall and rainfall (saturated water) The largest part of the slope potential sliding surface mainly along the foot 45 ° direction of expansion. Therefore, the bottom of the rock slope foot and the ecological belt should be the key reinforcement area, which should be treated by the reinforcement of the anchor and effective drainage.