晋中南重载铁路下穿京沪高速铁路立交方案研究

摘要

The purpose of this study was to find a best way in order that the middle and southern Shanxi heavy-haul railway could safely intersect the existing Beijing-Shanghai High-speed Railway at Taian region in Shandong province. If it crossing above the high-speed railway, it would pose a threat to operation safety of the high-speed railway;while if it crossing below the high-speed railway, the subgrade shoulder level designed would be lower than the once-in-a-hundred-years highest flood level, due to this railway facing the Dawen River on the north at the intersection point. Thus, the key technical problem that needed to be solved in the study of grade separation scheme of the two railways was:how to achieve an ideal design of this heavy-haul railway, with which not only the requirement of flood control of railway could be satisfied, but also the adverse effect of dynamical stresses on high-speed railway's bridge piers could be avoided during trains running on this heavy-haul railway. Eventually after research, a optimal scheme of crossing below the high-speed railway via an embankment-type U-shaped structure was proposed in this study, and above-mentioned key technical problem was solved by that scheme. As a result, that scheme has successfully passed relevant technical review and has been put into implementation, with a good effect of design.%晋中南重载铁路与京沪高铁在山东泰安地区交叉，其上跨京沪高速铁路方案存在影响高速铁路运营安全的风险，而下穿京沪高速铁路方案，其线路在交叉处北临大汶河，设计的路肩高程低于大汶河百年洪水位。如何使晋中南铁路设计既满足铁路防洪要求，又避免重载列车运营时的动应力对高速铁路桥墩产生不利影响，是两线立交方案需要研究解决的关键问题。研究提出采用路堤式U形槽下穿京沪高速铁路的方案，解决了上述关键技术问题，使得方案顺利通过技术审查并实施，取得了良好的设计效果。