新建隧道近距离上跨既有铁路隧道方案分析与研究

摘要

Based on the engineering practice of a new tunnel crossing an existing railway tunnel with short distance, this article analyzes such restricted conditions as external factors, engineering geology, and supporting structure of the existing railway tunnel. It presents three schemes; makes a comprehensive comparison of numerical analyses, engineering features, and requirements; and ultimately recommends an open-cut tunnel scheme.%文章通过新建隧道近距离上跨既有铁路隧道具体工程实践,分析了外部控制因素、工程地质及既有隧道支护结构等限制条件,提出了三种不同上跨方案,并综合比较了相关数值分析、工程特点与要求,最后推荐采用更为合理可行的明挖隧道方案.