渝利铁路青石岩段边坡危岩体稳定性评价及防治措施研究

渝利铁路青石岩段为深切河谷型边坡,该边坡表部岩体在风化缷荷作用下结构复杂且稳定性差。此外,浅表层岩体在降雨、地震及工程开挖等影响下,局部已经出现了不同模式不同规模的变形失稳现象,严重影响工程建设和运营期间的安全。因此,本文根据边坡岩体结构特征及风化缷荷特征等工程地质条件,结合不同失稳模式的危岩体,提出了相应的稳定性评价理论和方法。最后,针对不同规模和不同稳定状态下的危岩体提出了有效的防治措施。

STABILITY EVALUATION AND PREVENTION MEASURES OF POTENTIAL UNSTABLE ROCK MASS ALONG THE SLOPE OF QINGSHIYAN SECTION OF YU-LI RAILWAY

The surface rock masses on the slope of Qingshiyan section of Yu-Li railway have lots of discontinuities and are of low stabilities with weathering and load-release during the valley eroded down.Moreover,the surface rock masses locally present different modes and deformation or instability phenomena under the influence of rain,earthquake and engineering excavation,which seriously affects the security of people and buildings during engineering construction and railway operation.Therefore,according to engineering geological conditions of the slope,such as the characteristics of rock mass structure and weathering and load-release.the authors had put forward corresponding theories and methods of stability evaluation with different failure modes of potential unstable rock masses.Finally,the authors had put forward some effective prevention measures for potential unstable rock masses of different sizes and stability states.