合武铁路中空式路肩挡土墙设计探讨

Design Research on Hollow Shoulder Retaining Wall on Hefei-Wuhan Railway

研究目的:随着城际铁路、高速客运专线的建设,既有枢纽引入客运专线工程对城市用地及居民的生活影响较大,不仅拆迁费用成倍增加,而且拆迁难度大、时间长,严重影响工程建设。合(肥)武(汉)铁路引入武汉枢纽地段并行增建工程中,增建一侧为高层建筑群,扩建征地困难。为此,设计采用C35钢筋混凝土框架直立中空式刚性路肩挡土墙。研究结论:该结构集挡土墙、涵洞、桥梁结构设计于一身,刚性框架结构与人行道悬臂板组成的墙顶面满足了站后专业附属设施的布设,既体现了路基设计工程措施的创新、合理性,又确保了既有线行车和既有建筑物安全。经运营后充分体现该结构占地小,基础底面较宽,自身稳定性强,水平抗力大,抗滑、抗倾效果好,更起到路基边坡支挡与收坡的双重作用,在今后同类型铁路路基工程的设计与施工中具有重要的借鉴、参考作用。

Research purposes： As the construction of intercity railroad and high - speed passenger special railway, introducing railway hub into passenger dedicated line causes great influnces on urban land and people＇ s life. Because its demolition costs are not only doubled, but the demolition is difficult, time wasting and seriously affecting the engineering construction. Importing of Hefei - Wuhan railway into Wuhan hub causes parallel addition engineering. There are many high -rise buildings at one side of the addition engineering and lots of difficulties in extension and land expropriation project. So, C35 reinforced concrete frame -upstanding- hollow -shoulder retaining wall is designed. Research conclusions：It contains retaining walls, culverts and bridge structural design in one system. The top of the wall surface, composed of rigid frame and sidewalk cantilever plate, meets the need of the layout of the station professional ancillary facilities. This structure design not only reflects the innovation and rationality of subgrade design, but also ensures the safety of existing lane and the existing building. After operation, its benefits of small footprint, wide bottom base, better itself stability, high level of resistance, and better anti - slide, anti - dumping effect, are fully reflected. But it also plays with the dual role of slope retaining and slopes receive. So, in the future, this design has the important reference value for the same type of railway roadbed engineering design and construction.