考虑全寿命管养的桥梁检修孔后开设方案研究

Study on Setup Scheme of Bridge Manhole Considering Full-life Management and Maintenance

对于运营中的预应力混凝土箱梁桥,受恶劣环境及车辆超载等因素影响,经常会出现各种各样的病害,由于常规的混凝土箱梁一般不设置永久检修孔,此类箱梁内部的病害不能及时发现和处理,为桥梁管养和检修带来困扰。通过对既有混凝土箱梁桥开设永久检修孔,并对开设后梁体的局部受力情况进行有限元分析,提出合理的补强方案,解决箱梁内部检修和养护的需求,为桥梁全寿命周期运营提供安全保障。

For a prestressed concrete box girder bridge in service,various faults will often occur because of the severe environment and vehicle overload.Due to no permanent manholes generally set up for the conventional prestressed concrete box girder,the faults within this kind of box girder cannot be found and treated in time,which will bring the trouble for the maintenance and repair of bridge.By setting up the permanent manholes for the existing concrete box girder bridges,and the finite element analysis on local stress state of the girders after set up,a reasonable strengthening scheme is proposed to solve the needs of internal maintenance and repair of box girder,and to provide the safety guarantee for the full-life cycle operation of bridge.