滨海软工地区近接运营高铁顶进铁路立交桥工程施工技术

软弱地质条件下紧临运营高铁顶进立交桥施工，对线路、桥梁、路基引起的沉降以及差异沉降风险大，安全要求非常高。以天津市武清区翠亨路下穿京津城际及京沪铁路立交工程为例，通过建立有限元模型，对设计和施工方案进行试验分析，介绍止水帷幕和基坑开挖等施工工艺要点，以期对类似工程提供借鉴。

Thrusting Construction Technology of Railway Overpass Bridge Close to the Operational High-speed Railway on the Coastal Soft Ground Area

Thrusting construction of overpass bridge close to the operational high-speed railway on the weak geological layer is highly risky and requiring strict safety regulations. The risks include the layer settlements caused by circuit, bridge, railway beds and the relative settlement. This paper uses the interchange project located Cuiheng Road, Wuqing District, Tianjing, underneath Beijing-Tianjin Intercity Railway, and Beijing-Shanghai Railway as an example, and finite element vision is created to analyze and test the design and construction program. It introduces the key points of water proof curtain and foundation pit excavation, etc. , so as to offer instructive information for future references.