金山立交桥顶进扎头原因及纠偏措施

The reasons and correct steps of jacking plunging into ground of Jinshan overpass

结合工程实例,对顶进施工中形成“跷跷板”现象的原因进行了分析,提出了纠偏措施,探讨了纠偏过程中应注意的事项,从而避免出现“跷跷板”现象,指出在顶进期间还应对桥体采取加固体系悬空方案,以避免扎头。

Combined with the project examples,it analyses the reasons of the phenomenon of ＇teeter-totter＇ in the construction of jacking,puts forward the correct steps,discusses the matters need attention in the process of correct,and this avoids the phenomenon of ＇teeter-totter＇,points out that it should adapt the program of strength system suspended in the process of jacking,to avoid plunging into ground.