甘肃某岩堆稳定性分析及工程治理建议

对甘肃某大型岩堆体进行稳定性分析。根据变形特征将岩堆体划分为A、B、C、D四个区。对稳定性差的B、C区，就岩堆体内部失稳和沿岩土界面失稳两种机理进行分析，沿岩土界面滑动的稳定性系数均大于1，处于欠稳定-基本稳定状态，失稳的可能性较小，岩堆体内部在地震工况下稳定性系数分别为0.854、0.847，处于不稳定状态，失稳的可能性大。由于岩堆体坡度较陡，在岩堆体上设置抗滑措施易形成越顶风险，于桥墩处设置防撞措施为经济有效的治理手段。

Stability analysis and engineering treatment suggestions for a rock heap in Gansu

In this paper, the stability analysis of a large rock heap in Gansu is conducted. Based on the deformation characteristics, the rock heap is divided into four zones, A, B, C, and D. For Zone B and C with poor stability, stability analysis is conducted on two mechanisms of internal instability and instability along surface. The stability coefficient of sliding along rock soil interface is greater than 1, indicating an under stable to basically stable state with a low possibility of instability. The stability coefficients of internal heap under seismic conditions are 0.854 and 0.847, indicating an unstable state with a high possibility of instability. Due to the steep slope of rock heap, setting anti slip measures on rock heap has a risk of overtopping. Therefore, setting anti-collision measures at bridge piers is an economically effective means.