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新店子滑坡是位于 10 8国道广北段 K1 4 + 6 0 0 处的一个古滑坡体 ,纵向长 180 m,横向宽约 12 0 m (平均值 ) ,平均厚约 30 m,总体积近 6 5万 m3。在边坡开挖修建 10 8国道后 ,由于嘉陵江对滑坡体前缘的不断冲刷 ,导致滑坡体前缘高陡部分出现拉裂缝。如果该滑坡复活 ,将严重破坏 10 8国道的交通 ,并且破坏坡顶的高压输电线路。为对滑坡进行有效的处治 ,必须首先搞清楚滑坡的成因机制。经过对滑坡详查勘探 ,查清了滑坡形成的地质背景、滑坡的物质组成以及滑带的基本特性。通过地质力学方法对滑坡成因机制进行分析 ,在此基础上利用极限平衡方法 ,采用安全系数和破坏概率对该滑坡天然状态及不利组合条件下的稳定性进行了评价 ,同时对防治措施进行了初步分析 ,为选择治理设计方案提供了重要的依据。
Xindianzi landslide is an ancient landslide body located at K1 4 + 600 on Guangbei Section of State Route 108 with a vertical length of 180 m and lateral width of 12 0 m (mean value) with an average thickness of about 30 m and a total volume of nearly 6 50,000 m3. After the excavation of the 10 8 State Road in the slope excavation, due to the constant erosion of the front edge of the landslide body by the Jialing River, the high-steep part of the front edge of the landslide body appears to pull the cracks. If the landslide resurgence will severely damage the traffic on State Road 108, and destroy the high-voltage power transmission lines on the top of the hill. In order to effectively treat the landslide, we must first understand the mechanism of the landslide. After detailed investigation of the landslide, the geological background of the landslide formation, the material composition of the landslide and the basic characteristics of the landslide have been identified. The mechanism of landslide is analyzed by geomechanical method. Based on this, the method of limit equilibrium is used to evaluate the stability of the landslide under natural conditions and unfavorable combination conditions by using the safety factor and failure probability. At the same time, the preventive measures are preliminary Analysis, to select the governance design provides an important basis.