地铁车站预留远期线路下穿条件设计

Reservation in subway station for future line passing beneath

介绍了地铁车站预留下穿条件的案例。采取两个方面的措施保证远期线路下穿施工时该站的安全运营。一方面,在底板预留隧道范围两侧设置工程桩加强车站结构,另一方面对坑底土体进行旋喷加固以减小土体变形。对于远期线路实施时地墙洞门凿除工况进行了计算,根据计算结果采取相应措施。该方法设计思路明确,效果可靠,可供类似工程参考。

A case of reservation in subway station for future line passing beneath is introduced. Two measures are taken to ensure the operation safe of the station during the construction of the future line. On one hand,piles are set on both sides of the reserved tunnel area; on the other hand,the jet grouting is used to reduce the deformation of the soil. For the implementation of the future line,the gouging and removing conditions of the underground wall are calculated,and corresponding measures are taken according to the calculation results.