阿勒泰骆驼峰景区崩塌灾害特征与防治措施研究

Study on rock fall features and prevention in mount camel of Altay

以阿勒泰市骆驼峰景区崩塌灾害为工程背景,采用地质分析法研究其形成机制,利用赤平极射投影与数值计算得出典型崩塌危岩体的稳定性,通过现场调查与Rocfall模拟软件分析崩塌落石的运动特征,并提出防治方案。研究结果表明:成岩过程中形成的结构面在后期持续的地质应力的作用下张开甚至贯通,以及强烈的冻融循环作用是形成骆驼峰崩塌的主要原因;数值计算结果显示,崩塌体在外界扰动因素(降雨/融雪、地震)的作用下稳定系数降低明显,多数处于欠稳定-不稳定状态;崩塌落石形成后经历抛掷、碰撞、弹跳、滚动等运动状态,弹跳高度最大值为11.3 m,总动能最大值为304.6 k J。根据分析成果,提出"主动+被动"相结合的崩塌防治措施,既避免破坏景观,又达到了治理效果。

As one of the main geo-hazards in mountain regions,rock fall usually occurs in a sudden andbrings about serious damage. Geological analysis as well as mathematical calculation and Rocfall Softwareare used to study the rock fall mechanism as well as stability and movement features. In addition,the pre-ventive methods are put forwards. The research shows that the structural plains formed in the diagenesis pe-riod have been expanded and finally broken by the continuous geological process and serious freezing-thaw-ing effect. The instability of rock fall will be aggravated by external factors such as rain/snow and earth-quake according to the calculation results. The rock fall movement contains casting, crashing, bouncingand rolling. The maximum bouncing height is 11.3m and the maximum motion energy is 304.6k J. Based onthe analysis,the initiative and passive prevention plan is carried out to treat with the rock falls,mean-while,to avoid disfiguring the landscape.