健安桥处于北京市中轴路上,是北京南北交通要道,车流量非常大,在隧道开挖引起的桥墩下沉过程中,同时在遭受车辆动栽的情况下很容易加快桥梁的变形破坏,一旦出现危险必然导致交通瘫痪。因此,通过对洞内、洞外加固技术方案的对比和方案论证。保证桥梁的不均匀沉降和均匀沉降在允许范围内是桥梁能否安全运营的关键,也是施工过程中控制的重要依据和指标。施工中采用超前大管棚、WSS注浆等工艺,保证了施工质量,加快了施工进度,为同类城市地铁下穿桥梁、河流施工积累了经验。 Jian’an Bridge is located on the central axis of Beijing. It is a traffic artery between north and south of Beijing. Traffic flow is very large. During the sinking process of bridge piers caused by tunnel excavation, it is easy to speed up the deformation and failure of bridges Once in danger, traffic will be paralyzed. Therefore, through the cave, outside the hole reinforcement technology program comparison and program demonstration. Assurance bridge uneven settlement and uniform settlement within the allowable range is the key to the safe operation of the bridge, but also the construction of an important basis for control and indicators. Construction using advanced pipe shed, WSS grouting and other technology to ensure the construction quality and speed up the construction schedule for the same city subway under the bridge, river construction has accumulated experience.