高速公路空心梁桥的拼宽设计

Widening design of hollow beam bridges on expressway

通过对一座预应力混凝土空心梁桥进行拼宽分析,确定了新老空心梁混凝土收缩、徐变差异、基础沉降差异和汽车荷载对拼接缝和老桥的影响,指出了铰接空心梁拼接刚接空心梁是可行的。

Through the analysis of the widening of a prestressed concrete hollow beam bridge, the influences caused by the contraction and shrink difference of new and old concrete hollow beams, the foundation settlement difference and vehicle loads on concatenate seams and the old bridge were determined. Meantime, the concatenation between hinged hollow beams and rigid connected hollow beams was feasible.