某铁路客运专线艰险山区短路基工程措施研究

某铁路客运专线线路穿越了秦岭和大巴山两大艰险山区，两大山区地形起伏、地势陡峻，地质复杂，工程设置条件困难，桥隧之间短路基在所难免。短路基工程措施如何设置才能满足客运专线运营平稳性、舒适性的要求显得尤为重要。通过对四处桥隧之间短路基工点的地形地质情况介绍、对修建路基工程要解决的问题及难点进行了分析，并提出了针对性的工程措施。该铁路客运专线陕西段所有短路基施工完成后，通过堆载预压、沉降观测及通车两年的检验，工后及差异沉降满足标准要求、线路平稳舒适。

Study on Engineering Measures for Short Subgrade in Dangerous Mountainous Area along a Passenger Dedicated Railway Line

A passenger dedicated railway line passes through two dangerous mountainous areas, Qinling Mountains and Daba Mountain, where are of steep relief and complicated geology. The engineering setting conditions are so difficult that short subgrade between bridges and tunnels is inevitable. Therefore it is very important to set the engineering measures in order to bring about steady operation and comfortability of this passenger dedicated line. Herein the topographical and geological conditions of four sites of short subgrade between bridges and tunnels were introduced with the problems and difficulties to be solved in the construction of subgrade engineering analyzed, and then the targeted engineering measures were proposed. All the short subgrade construction of Shanxi section on this line were inspected after completion by means of surcharge preloading, settlement observation and two-year transport service. The post-construction and differential settlement met the standard requirements, and there realized the line of stationarity and comfortability.