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A platform for research: civil engineering, architecture and urbanism
Cast-in-place box girder spanning cavern method for karst tunnel
The invention belongs to the technical field of box girder spanning cavern construction, and discloses a cast-in-place box girder spanning cavern method for a karst tunnel, which comprises the following steps of treating a foundation; erecting a bracket; mounting an outer side mold; binding bottom and web steel bars; threading the steel strands; mounting an inner mold; binding top plate reinforcing steel bars; pouring concrete; carrying out surface finishing and maintenance; conducting pre-tensioning and initial tensioning; removing the template and the bracket; performing final tensioning andmud jacking; adopting a full framing method for construction; the bottom die, the outer die and the inner die are all wood dies, the inner supports are pulled outwards, and tie bars are arranged at the beam bottom and the beam top for reinforcement; concrete pouring adopts centralized stirring of a mixing station, a tank truck transports the concrete to a construction site, and a delivery pump truck pours the concrete; the full framing foundation is locally filled with tunnel hole slag, a water passing channel is reserved, and the foundation is hardened by C20 concrete by 30 cm. The method isconvenient to construct, durable, convenient to maintain, small in investment scale, good in universality and high in economic benefit; obvious stress concentration cannot be generated at the periphery, and a new fatigue risk source is prevented from being introduced.
本发明属于箱梁跨越溶腔施工技术领域，公开了一种用于岩溶隧洞中现浇箱梁跨越溶腔方法，包括：地基处理；支架搭设；外侧模安装；底、腹板钢筋绑扎；钢绞线穿束；内模安装；顶板钢筋绑扎；浇筑砼；收面、养护；预张拉和初张拉；模板、支架拆除；终张拉、压浆；采用满堂支架法施工；底模、外模、内模均采用木模，内撑外拉，并在梁底和梁顶设拉筋进行加固；混凝土浇筑采用拌合站集中搅拌，罐车运至工地，输送泵车浇筑；满堂支架基础局部采用隧道洞渣填筑，留出过水通道，基础采用C20砼硬化30cm。本发明施工方便，持久耐用，养护方便，投资规模小，通用性良好，经济效益高；不会在周边产生明显的应力集中，避免引入新的疲劳风险源。
Cast-in-place box girder spanning cavern method for karst tunnel
The invention belongs to the technical field of box girder spanning cavern construction, and discloses a cast-in-place box girder spanning cavern method for a karst tunnel, which comprises the following steps of treating a foundation; erecting a bracket; mounting an outer side mold; binding bottom and web steel bars; threading the steel strands; mounting an inner mold; binding top plate reinforcing steel bars; pouring concrete; carrying out surface finishing and maintenance; conducting pre-tensioning and initial tensioning; removing the template and the bracket; performing final tensioning andmud jacking; adopting a full framing method for construction; the bottom die, the outer die and the inner die are all wood dies, the inner supports are pulled outwards, and tie bars are arranged at the beam bottom and the beam top for reinforcement; concrete pouring adopts centralized stirring of a mixing station, a tank truck transports the concrete to a construction site, and a delivery pump truck pours the concrete; the full framing foundation is locally filled with tunnel hole slag, a water passing channel is reserved, and the foundation is hardened by C20 concrete by 30 cm. The method isconvenient to construct, durable, convenient to maintain, small in investment scale, good in universality and high in economic benefit; obvious stress concentration cannot be generated at the periphery, and a new fatigue risk source is prevented from being introduced.
本发明属于箱梁跨越溶腔施工技术领域，公开了一种用于岩溶隧洞中现浇箱梁跨越溶腔方法，包括：地基处理；支架搭设；外侧模安装；底、腹板钢筋绑扎；钢绞线穿束；内模安装；顶板钢筋绑扎；浇筑砼；收面、养护；预张拉和初张拉；模板、支架拆除；终张拉、压浆；采用满堂支架法施工；底模、外模、内模均采用木模，内撑外拉，并在梁底和梁顶设拉筋进行加固；混凝土浇筑采用拌合站集中搅拌，罐车运至工地，输送泵车浇筑；满堂支架基础局部采用隧道洞渣填筑，留出过水通道，基础采用C20砼硬化30cm。本发明施工方便，持久耐用，养护方便，投资规模小，通用性良好，经济效益高；不会在周边产生明显的应力集中，避免引入新的疲劳风险源。
Cast-in-place box girder spanning cavern method for karst tunnel
一种用于岩溶隧洞中现浇箱梁跨越溶腔方法
ZHU QINGLI (author) / REN GAOFENG (author) / ZHU PENGGANG (author) / WANG FENG (author) / ZHANG QINJUN (author) / GUO KAI (author) / LYU ZENGYIN (author) / TANG HUI (author) / ZHANG JUN (author)
2021-03-16
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
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