斜交多跨预应力混凝土连续梁桥加宽技术方案研究

对某斜交多跨预应力混凝土连续箱梁的横向拼宽问题进行拼接方式分析,并定性研究拼接后支承条件的变化及其相关因素对原结构(老桥)受力的影响。拟订了3种拼接方案,对比分析了其施工难易程度和拼接前后结构的受力特点,并对有关截面进行了修正。分析表明,对该桥进行拼接在技术上是可行的。

Study of Technical Schemes for Widening of a Skew Multi-Span Prestressed Concrete Continuous Girder Bridge

This paper analyzes the assembling ways for widening of a skew multi-span pre-stressed concrete continuous box girder bridge and qualitatively studies the influences of varied supporting conditions after assembling and other related factors on the structural behavior of the original bridge(old bridge).Three schemes of the assembling have been prepared for widening of the bridge.The construction difficulties of the schemes and structural behavior characteristics of the bridge before and after widening are comparatively analyzed,and the relevant sections of the bridge are modified.The results of analysis indicate the widening of the bridge by way of the assembling is technically feasible.