与地下广场衔接的下穿地道设计

Design of Underpass Linked up with Underground Square

主要介绍了松原火车站前建华路地道项目的设计。合理分析了地道功能和站前地下广场功能,在地道内设置辅道,将市政地下空间和铁路建筑地下空间连为一体,完成了市政交通和铁路交通的相互转换。通过地道箱涵结构计算,净跨18m的单箱双舱地道箱涵,在覆土厚度不大于1m时,设计采用壁厚1300mm的普通钢筋混凝土结构,其受力和变形能够满足要求,且结构配筋由正常使用极限状态下标准组合所产生的内力值控制。砂土层地区地道基坑围护选用排桩+内支撑结构,保证了地道施工、火车站运行及周边环境的安全。

This paper mainly introduces the design of Jianhua Underpass Project of Songyuan Railway Station, and reasonably analyzes the underpass function and the underground square function of the railway station. The auxiliary road is constructed in the underpass to integrate the municipal underground space and the underground space of railway buildings, which completes the interchange of municipal traffic and railway traffic. According to the calculation of underpass box culvert structure, the one-box double-cabin underpass box culvert with the a net span of 18 m is designed as a 1 300 mm-wall thick ordinary reinforced concrete structure when the thickness of covering soil is not larger than 1 m. Its stress and deformation can meet the requirements, and the structural reinforcement is controlled by the inner force value produced by the standard combination in the limit state of normal use. The support of foundation pit for the underpass in the sandy area is the soldier pile and inner support structure, which can guarantee the safety of underpass construction, railway station operation and surrounding environment.