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针对板端设置挡台板式轨道存在的水泥沥青砂浆(CAM)层伤损及积水和排水问题,以减少CAM层撕裂和水的浸蚀为目标,对内置挡台板式轨道技术经济性进行了全面分析。与板端设置挡台的板式轨道相比,内置挡台的单孔板式轨道具有随板长增加而横向稳定性增强,以及附加弯矩及纵向受力特性与Ⅰ型板式轨道相当的特点。对轨道板长度及其在常用跨度桥梁上组合方式进行了计算分析,论证了在32 m梁上采用5块长6 440 mm2、4 m梁上采用4块长6 090 mm轨道板组合方式的技术优势、经济优势和施工优势,指出板长优化及组合方式优化对加快施工进度、节省投资方面具有的重大意义。建议单元板式轨道应优先采用单孔板式轨道及常用跨度梁上应采用6 440 mm和6 090 mm轨道板。
In order to reduce the CAM layer tear and the water erosion, aiming at the damage of the cement asphalt mortar (CAM) layer and the water accumulation and drainage problems existing in the baffle plate track on the plate end, the technical cost-effectiveness of the built-in baffle plate track A comprehensive analysis. Compared with the plate track with the stop plate at the plate end, the single-hole plate track with the built-in stop plate has the characteristics of increased lateral stability as the plate length increases, as well as the additional bending moment and longitudinal force characteristics corresponding to the type Ⅰ plate track. The length of the track slab and its combination on the common span bridge were calculated and analyzed. The technology of using 5 pieces of 6 090 mm track slab combination on 5 m long beams of 6 440 mm2 and 4 m beams on 32 m beams was demonstrated Advantages, economic advantages and construction advantages, pointed out that the optimization of the length of the board and the optimization of the combination have great significance in accelerating the construction progress and saving investment. It is recommended that slabs of 6 440 mm and 6 090 mm should be used on slab tracks of single-hole slabs and on common strands of beams.