高速铁路隧道台阶法施工技术参数分析与应用

摘要

隧道台阶法施工因其适应性较强而受业界青睐,但高速铁路大断面隧道台阶法施工技术要素的合理选取有待深入分析论证.文章试图通过建立三维数值计算模型,综合分析多种围岩条件下不同台阶要素对洞室稳定性的影响,以期为台阶长度、高度及上断面扁平度等重要参数的选取提供理论支撑；并通过西南艰险山区高速铁路隧道工程实践证实了其科学可靠性.%The bench method in tunnel construction is favored due to its good adaptability. It is necessary to take a further study on the reasonable selection of technical factors involved in bench method for large-section tunnel of high-speed railway. A three-dimensional numerical calculation model is established to analyzes the influence of factors on excavation stability and provide the theoretical support to the selections of bench length, bench height and flatness of upper section.