The paper analyzes the stress of the single-box double-room straight line continuous box girder section with the span of 25 meters by using truss method and beam grid method,and proves by the result that the stress distribution is uneven on the same section,and the place around the joint is especially obvious.So the stress distribution law should be mastered reasonably in the design and the influence of the quantity of reinforcement and the reinforcement allocation way should also be considered.%分析了杆系法及梁格法对跨度25 m独柱式桥墩支撑的单箱双室直线连续箱梁截面应力,结果表明,在同一截面上,应力分布不均匀,支点附近处尤为明显,指出设计时要合理把握应力分布规律,在确定配筋量及钢筋布置方式时应予以考虑其影响。
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