软弱地层大跨度超浅埋过街通道暗挖设计

Design on Shallow Tunneling of Wide Underpass in Soft Ground

针对本项目的工程地质条件和复杂的周边环境,遵循"管超前、严注浆、短进尺、强支护、快封闭、勤量测"的原则,通过选取合理的施工方案、可靠的支护措施和合适的监控量测方案,进行了软弱地层大跨超浅埋过街通道暗挖设计,最终确保了通道安全竣工,并保证了地下管线、相邻地铁和地面交通的安全运行.

According to the poor geological conditions and complex surroundings of the project, shallow tunneling technology is used to abide by the principle＂Pre-grouting first, shortening tunneling step, strengthening the support, seal the lining soon and measur the deformation frequently＂. Reasonable exca- vation method, strong support and suitable monitoring measurement are used without traffic interruption of above street. Eventually, the underpass is built safely with municipal tubes or wires and metro tunnel protected successfully.