监理三标外方监理的专题报告SSR-027---无砟轨道施工时常见缺失与注意事项 幻灯片 2.pptVIP

Rebar installation of Track slab construction无砟轨道轨道板施工-钢筋安装 Lack accurate of fabrication angle and sizes 裁切尺寸与加工弯折角度的精度不良 * Rebar installation of Track slab construction无砟轨道轨道板施工-钢筋安装 Defective insulation 绝缘不良 * Rebar installation of Track slab construction无砟轨道轨道板施工-钢筋安装 Lack of concrete cover 混凝土保护层不足 * Concrete curing of Track slab construction无砟轨道轨道板施工-混凝土养护 Lack of continue moistening 未保持混凝土湿润的连续性 * * Suggestion of construction optimization施工优化的建议-桥面板凿毛时的防尘 Install cover and vacuum on the concrete scrubber to prevent dust pollution 安装防护罩及吸尘机在凿毛机上，及时将凿毛时的尘土收集在吸尘机的集尘袋内，防止凿毛时的尘土飞扬 Suggestion of construction optimization施工优化的建议-底座板施工 Water stop wall 挡水台 Starter bar for Water stop wall 挡水台预留筋 Starter steel groove for Expansion joint seal 伸缩缝橡胶带耐候型钢 Install starter bar near expansion joint end of the concrete base layer to prevent crack occurred at the joint between the base concrete layer and water stop wall 底座板施工时在梁端伸缩缝处的左右两侧安装挡水台的接茬筋，避免未来因列车行走时的震动与温差，造成底座板与挡水台接缝处的开裂 * * Suggestion of construction optimization施工优化的建议-轨道板钢筋问题 Designed upper layer and lower layer rebar were in same size and length, the hooks joint together became complicated at corner. It causing different concrete cover on side and the rebar cage will not be quadrated shape. Especially 4 hooks fixed at corners. 设计钢筋笼上下层钢筋长度相同，因此在轨道板四周的立面弯钩都会出现互相干扰，特别是四个角落钢筋弯钩的绑扎变得极其复杂，造成同一根钢筋有不同的保护层的现象；且钢筋笼整体无法形成方正的主体 Suggestion of construction optimization施工优化的建议-轨道板钢筋调整方案-1 * Modify all the rebar to two different lengths as upper layer rebar longer than lower layer 统一将钢筋笼上下层钢筋长度调整成上层筋较下层筋长，以上包下的形式形成箍 Plan view 平面效果模拟 Vertical view 立面效果模拟 3D view 立体效果模拟 Longitudinal bar 纵向钢筋 Horizontal bar 横向钢筋 Suggestion of construction optimization施工优化的建议-轨道板钢筋调整方案-2 * Combine the upper and lower layer horizontal bar to be closed stirrup if there is no problem with the electricity insulation between each single one of them and agreed by designer. It could save huge cost on material and installation 请设计单位研究，在无单一组上下层