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在天津市地铁一号线既有线改造工程中,必须解决将原有车站进行改造所面临的差异沉降控制问题。因车站地处交通要道下,附近交通拥挤,使得改造工作难度较大。从施工的环保和安全角度出发,对控制结构在开挖过程中、改造完成并回填土后的沉降以及减少新旧结构差异沉降方法进行了研究,给出了解决方案。
In the existing reconstruction project of Tianjin Metro Line 1, it is necessary to solve the problem of differential settlement control faced by the original station. Due to the station is located under the traffic arteries, traffic congestion in the vicinity, making reconstruction more difficult. From the perspective of environmental protection and safety of construction, the control structure during the excavation process, the completion of the transformation and the settlement after the backfill and the method of reducing the differential settlements of the old and the new structures were studied and the solutions were given.