轨道高架桥下基坑开挖的相关措施及研究分析

近年来,越来越多的工程建设与已建轨道的关系越来越密切,施工环境也越来越复杂.以春申湖路快速化改造中元和塘东隧道基坑下穿轨道2号线号线高架为例,通过开挖施工中采取的一系列技术措施(MJS工法、开挖工序安排、应用支撑自动轴力补偿系统、加强监测等),并运用数值模拟软件,建立地上地下整体模型,将结果与过程监控数值对比,确保了轨道交通结构稳定和运营安全,为今后难度大、复杂程度高的城市建设施工提供了很好的借鉴作用.

Relevant Measures and Research Analysis of Foundation Pit Excavation under Rail Transit Viaduct

In recent years, more and more engineering constructions are increasingly related to the built tracks, and the construction environment is becoming more and more complex. Taking the foundation pit of Yuanhetang East Tunnel under the viaduct of Metro Line 2 in Chunshenhu Road Rapid Reconstruction Project as an example, a series of technical measures of MJS construction method, excavation process arrangement, application of support automatic axial force compensation system, strengthening of monitoring, etc. are taken in the excavation construction, and the numerical simulation software is used to establish the overall model of ground and underground. The results are compared with the process monitoring values in order to ensure the structural stability and operation safety of rail transit, which provides a good reference for the great difficulty and high complexity of city construction in the future.