运营高速中央隔离带内桥梁下部结构拆除技术研究

Research on the Demolition Technology of Bridge Substructure in the Central Isolation Zone of Operating Expressway

为解决桥梁改扩建过程中在夹缝中低影响交通条件下拆除原有老桥下部结构施工困难的问题,以某一级公路改扩建为背景,在周边交通压力大、施工用地狭小等诸多限制条件下,提出了一套适用于在运营中的国家高速中央隔离带内进行桥梁下部结构拆除的施工技术。此技术有效地实现了交通短暂中断,在满足安全、工期、成本要求的情况下一次成功拆除的施工目标。此方法的成功应用,为桥梁拆除施工技术的创新提供了一种新思路,可以为同类工程施工提供一定参考。

In order to solve the problem that it is difficult to demolish the substructure of the old bridge in the process of bridge reconstruction and expansion under low-impack traffic conditions,this paper takes the reconstruction and expansion of a first-class highway as the background,and puts forward a set of construction technology suitable for demolishing the substructure of the bridge in the central isolation belt of the national expressway in operation under many restrictive conditions such as high traffic pressure and narrow construction land.This technology effectively achieves the construction goal of successful one-time demolition under the conditions of safety,schedule,and cost requirements,with only a short interruption of traffic.The successful application of this method provides a new idea for the innovation of bridge demolition construction technology,and can provide a reference for similar projects.