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由于缓和曲线是一条曲率不断变化的曲线,缓和曲线段内桥梁各桥墩既不平行,也不指向同一个圆心;缓和曲线段内装配式板桥各孔各块板长均不相同。因此,缓和曲线段内桥墩放样及板长预制的正确与否,是关系工程质量的关键环节。该文介绍了在任意点测设缓和曲线内桥墩的一种灵活放样方法,从现场测量放样的角度推算了装配式板桥各孔各块板长,使设计、测量和梁板预制三方能相互效验,确保工程质量。工程实践证明:从测量角度推算缓和曲线内装配式板桥板长的方法,数据准确、简便实用。
Since the easing curve is a curve whose curvature continuously changes, the bridge piers of the bridges in the easing curve section are neither parallel nor point to the same center; the plate lengths of the holes of the assembled plate bridge in the easing curve section are all different. Therefore, it is a key link that affects the quality of the project that the settlement of the bridge piers and the prefabrication of the slab length in the curve segment are correct. In this paper, a flexible method of setting out the pier of the curve in arbitrary point is introduced. The plate length of each hole of the assembled slab bridge is calculated from the point of view of the field measurement, so that the design, Effectiveness to ensure project quality. Engineering practice shows that: from the measurement point of view to ease the curve of the plate mounted plate bridge length method, the data is accurate, simple and practical.