RESEARCH ON OPERATING HEAVY-HAUL RAILWAY ROADBED-BRIDGE TRANSITION SECTION ROADBED AND RAIL REINFORCEMENT MEASURES

摘要

As for railway transport capacity requirements grow, as well as the development of high speed, high speed, heavy haul railway, railway rolling stock axle load increases, speed increased,adding to the dynamic interaction of train/track system, the subgrade deformation and failure of a number of new features.According to investigation, in China both railway bridge transition segment of disease widely and serious, as volume increased, device disease occurs and development speed up,especially bridge and the road culvert transition segment lots, due to embankment and bridge Taiwan of settlement characteristics and the both of stiffness differences, led to does not uniform settlement serious, due to its track geometry shaped bit difficult to long-term keep, is produced derailment, and off road, lane accident of more made section one.In addition, must also have a certain stiffness to meet Foundation and subgrade deformation limit and capacity requirements.For this purpose,generally selected from the packing and compaction (or stiffness) requires both to consider.As countries high-speed, heavy haul railways were constructed and successfully put into operation,reinforcement of bridge problems will become increasingly important.This article in Shuo-Huang Railway (Shuozhou-Huanghua port), 170th roadbed-bridge transition section of road,for example,railway-bridge transition section of track irregularity analysis overloaded cause of bridge approach at home and abroad, and project-specific problems, propose appropriate measures.