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随着我国社会经济的开放,道路运输事业成为社会经济发展的主要快速通道。桥梁担负着路与路的连接,随着交通公路事业的发展,近些年较多桥梁随之建设,同时也有较多桥梁在道路建设中旧桥利用。随着较大交通量的发展和较大吨位车量的运营,这些道路上的桥梁,负担着十分沉重的交通荷载及繁重的交通量。道路运输对桥梁的通行能力和承载能力也要求越来越高,而一些旧桥甚至近几年修建的桥梁,由于难以承受繁重的交通运营,桥梁长期疲劳作业,使之病害发展迅速,较多桥梁难以适应日趋增长的交通量需求。随着环境因素与行车荷载的相互作用,桥梁技术状况不断产生恶化,使用功能将低,为了保障桥梁使用安全,必须时常进行管理养护。
With the opening up of China’s social economy, road transport has become the major fast-track for social and economic development. Bridges bear the road and the road connection, with the development of the highway cause of traffic, more bridges have been built in recent years, but also more bridges in the road construction in the old bridge. With the development of larger traffic volumes and the operation of larger tonnage vehicles, the bridges on these roads bear heavy traffic loads and heavy traffic. Road transport also requires more and more capacity and carrying capacity of the bridge. Some bridges built in recent years even in recent years, due to the unbearable heavy traffic operation and long-term fatigue of the bridge, make the disease develop rapidly and more Difficult to adapt to the growing bridge traffic demand. With the interaction of environmental factors and driving load, the technical condition of the bridge continuously deteriorates and the utility function will be low. In order to ensure the safety of the bridge, management and maintenance must be carried out from time to time.