A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Construction method for side span closure section and cast-in-place section of large-span continuous box girder of overpass bridge
The invention discloses a construction method for a side span closure section and a cast-in-place section of a large-span continuous box girder of an overpass bridge. The construction method comprises the steps that a construction range is filled with filler with the thickness of 4 m and good water permeability, each layer is 50 cm, a road roller is adopted for rolling compaction layer by layer, the bearing capacity of a foundation in the construction range is detected before a support is erected, and it is ensured that the bearing capacity of the foundation meets the requirement; a C20 plain concrete cushion layer with the thickness of 20 cm is poured on the treated foundation, a certain cross slope is reserved during cushion layer pouring, temporary drainage ditches are dug in the two sides of the support and connected with nearby ditches, it is guaranteed that drainage is smooth in the whole construction period, and it is prevented that water is accumulated in the range of the support, and the stability of the support is affected. The side span cast-in-place section and the closure section are constructed at a time, the steel strands are installed after steel bars are bound, the exposure time of the steel strands and the corrugated pipes is greatly shortened, the damage probability of the steel strands and the corrugated pipes is reduced, the side span cast-in-place section and the closure section are constructed at a time, a stiff framework of the side span closure section can be omitted, material input is reduced, and the construction cost is reduced. And the engineering benefit is increased.
本发明公开了跨线桥大跨径连续箱梁边跨合拢段与现浇段的施工方法，包括对施工范围进行换填厚度为4米的透水性好的填料，每层50cm，采用压路机逐层碾压，在支架搭设前对施工范围的地基进行承载力检测，确保基底承载力满足要求；在处理后的基础上浇筑20cm厚的C20素混凝土垫层，垫层浇筑时预留一定的横坡，在支架两侧开挖临时排水沟，与附近水沟相连，保证整个施工期排水畅通，以防止支架范围内积水，影响支架稳定。边跨现浇段与合拢段一次性施工钢绞线在钢筋绑扎后才进行安装，大大缩短钢绞线及波纹管外露时间，减少钢绞线及波纹管受损的几率，边跨现浇段与合拢段一次性施工，边跨合拢段的劲性骨架可以取消，减少了材料的投入，增加了工程的效益。
Construction method for side span closure section and cast-in-place section of large-span continuous box girder of overpass bridge
The invention discloses a construction method for a side span closure section and a cast-in-place section of a large-span continuous box girder of an overpass bridge. The construction method comprises the steps that a construction range is filled with filler with the thickness of 4 m and good water permeability, each layer is 50 cm, a road roller is adopted for rolling compaction layer by layer, the bearing capacity of a foundation in the construction range is detected before a support is erected, and it is ensured that the bearing capacity of the foundation meets the requirement; a C20 plain concrete cushion layer with the thickness of 20 cm is poured on the treated foundation, a certain cross slope is reserved during cushion layer pouring, temporary drainage ditches are dug in the two sides of the support and connected with nearby ditches, it is guaranteed that drainage is smooth in the whole construction period, and it is prevented that water is accumulated in the range of the support, and the stability of the support is affected. The side span cast-in-place section and the closure section are constructed at a time, the steel strands are installed after steel bars are bound, the exposure time of the steel strands and the corrugated pipes is greatly shortened, the damage probability of the steel strands and the corrugated pipes is reduced, the side span cast-in-place section and the closure section are constructed at a time, a stiff framework of the side span closure section can be omitted, material input is reduced, and the construction cost is reduced. And the engineering benefit is increased.
本发明公开了跨线桥大跨径连续箱梁边跨合拢段与现浇段的施工方法，包括对施工范围进行换填厚度为4米的透水性好的填料，每层50cm，采用压路机逐层碾压，在支架搭设前对施工范围的地基进行承载力检测，确保基底承载力满足要求；在处理后的基础上浇筑20cm厚的C20素混凝土垫层，垫层浇筑时预留一定的横坡，在支架两侧开挖临时排水沟，与附近水沟相连，保证整个施工期排水畅通，以防止支架范围内积水，影响支架稳定。边跨现浇段与合拢段一次性施工钢绞线在钢筋绑扎后才进行安装，大大缩短钢绞线及波纹管外露时间，减少钢绞线及波纹管受损的几率，边跨现浇段与合拢段一次性施工，边跨合拢段的劲性骨架可以取消，减少了材料的投入，增加了工程的效益。
Construction method for side span closure section and cast-in-place section of large-span continuous box girder of overpass bridge
跨线桥大跨径连续箱梁边跨合拢段与现浇段的施工方法
WENG YIHONG (author) / FANG JIANCHUANG (author) / GUAN XIAOQIONG (author)
2023-10-13
Patent
Electronic Resource
Chinese
Large-span side-span cast-in-place section construction method
| European Patent Office | 2024
Overpass existing line large-span large-section steel box girder and construction method
| European Patent Office | 2024
Side-span closure section and cast-in-place section combining construction method
| European Patent Office | 2015
| European Patent Office | 2020
| European Patent Office | 2020