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A platform for research: civil engineering, architecture and urbanism
Tunnel connection air duct anchor-shotcrete support construction method
The invention relates to the field of tunnel engineering construction, in particular to a tunnel connection air duct anchor-shotcrete support construction method. Comprising the following steps that in the construction process of the tunnel connection air duct, a section is excavated according to the designed section size, corresponding advance supports are constructed, after initial spraying is completed, an initial supporting arch frame is reinforced, a high-grade section steel vertical frame is adopted, double-layer steel bar meshes are fully laid in the annular direction, and after the vertical frame is completed, C30 early-strength high-performance sprayed concrete is adopted for uniform covering; after the strength grade of the concrete meets the design requirement, C35 ultrahigh ductility concrete or cement paste is sprayed to construct a functional surface layer, the effect similar to that of molded concrete is achieved, and the operation ventilation requirement is met. The method can be suitable for rapid primary supporting of tunnel air duct tunneling, the self-stabilizing capacity of surrounding rock can be brought into play, and the problems that a traditional composite lining primary supporting face is long in exposure time and large in sedimentation, and main tunnel construction and operation safety are affected are solved; the method is economical and safe, the cost is saved, the construction efficiency is improved, and the construction progress is accelerated.
本发明涉及隧道工程施工领域，具体涉及一种隧道联络风道锚喷支护施工方法；包括以下步骤：在隧道联络风道施工中，按照设计断面尺寸开挖断面，施作相应超前支护，在初喷完成后，加强初支拱架，采用高等级型钢立架，双层钢筋网片环向满铺，立架完成后采用C30早高强高性能喷射混凝土均匀覆盖，待混凝土强度等级满足设计要求后采用喷射C35超高延性混凝土或喷射水泥浆施作功能性面层，实现类似模筑混凝土效果，满足运营通风要求。本发明方法可以适用隧道风道掘进的快速初支，有利于发挥围岩的自稳能力，避免传统复合式衬砌初支面暴露时间长，沉降大，影响正洞施工及运营安全问题；本发明方法经济、安全，有利于节约成本，提高施工效率，加快施工进度。
Tunnel connection air duct anchor-shotcrete support construction method
The invention relates to the field of tunnel engineering construction, in particular to a tunnel connection air duct anchor-shotcrete support construction method. Comprising the following steps that in the construction process of the tunnel connection air duct, a section is excavated according to the designed section size, corresponding advance supports are constructed, after initial spraying is completed, an initial supporting arch frame is reinforced, a high-grade section steel vertical frame is adopted, double-layer steel bar meshes are fully laid in the annular direction, and after the vertical frame is completed, C30 early-strength high-performance sprayed concrete is adopted for uniform covering; after the strength grade of the concrete meets the design requirement, C35 ultrahigh ductility concrete or cement paste is sprayed to construct a functional surface layer, the effect similar to that of molded concrete is achieved, and the operation ventilation requirement is met. The method can be suitable for rapid primary supporting of tunnel air duct tunneling, the self-stabilizing capacity of surrounding rock can be brought into play, and the problems that a traditional composite lining primary supporting face is long in exposure time and large in sedimentation, and main tunnel construction and operation safety are affected are solved; the method is economical and safe, the cost is saved, the construction efficiency is improved, and the construction progress is accelerated.
本发明涉及隧道工程施工领域，具体涉及一种隧道联络风道锚喷支护施工方法；包括以下步骤：在隧道联络风道施工中，按照设计断面尺寸开挖断面，施作相应超前支护，在初喷完成后，加强初支拱架，采用高等级型钢立架，双层钢筋网片环向满铺，立架完成后采用C30早高强高性能喷射混凝土均匀覆盖，待混凝土强度等级满足设计要求后采用喷射C35超高延性混凝土或喷射水泥浆施作功能性面层，实现类似模筑混凝土效果，满足运营通风要求。本发明方法可以适用隧道风道掘进的快速初支，有利于发挥围岩的自稳能力，避免传统复合式衬砌初支面暴露时间长，沉降大，影响正洞施工及运营安全问题；本发明方法经济、安全，有利于节约成本，提高施工效率，加快施工进度。
Tunnel connection air duct anchor-shotcrete support construction method
一种隧道联络风道锚喷支护施工方法
JIA XIAOBO (author) / WANG JIANJUN (author) / PENG JINGSONG (author) / SHU DONGLI (author) / WANG FUQIANG (author) / ZHOU BIN (author) / WANG ZHEN (author) / CHEN JIAJIA (author) / ZHANG JINCHAO (author) / ZHANG JINWU (author)
2023-12-29
Patent
Electronic Resource
Chinese
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