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Sprayed concrete structure suitable for pipe roofing freezing method
According to the sprayed concrete structure suitable for the pipe roof freezing method, a layer of frozen soil ring is evenly distributed on the periphery of a tunnel excavation face, a plurality of steel pipes arranged in the tunnel direction are evenly distributed and embedded in the frozen soil ring to form a steel pipe roof, and a steel arch, sprayed concrete and a steel bar hanging net are sequentially arranged on the inner side face of the frozen soil ring; the sprayed concrete is prepared from the following components: 335 to 441 kg of cement, 70 to 84 kg of zeolite powder, 151 to 187 kg of water, 797 to 904 kg of sand, 797 to 951 kg of ceramsite and 5.87 to 7.27 kg of a water reducing agent, the water reducing agent is a DXTR-9 type polycarboxylic acid high-performance water reducing agent produced by Guangzhou Tianxin building material science and technology Co., Ltd. The concrete has the characteristics of low hydration heat and heat preservation, the structural viscosity of the concrete can be increased, the water leakage phenomenon of a freezing ring is prevented, and meanwhile, the engineering cost is reduced.
一种适用于管幕冻结法的喷射混凝土结构，隧道开挖面外围均布设置有一层冻土圈，且冻土圈内均布嵌设有若干沿隧道方向布置的钢管而构成钢管管幕，冻土圈内侧面上依次设有钢拱架、喷射混凝土以及钢筋挂网；所述喷射混凝土中各组分组成为：水泥335～441kg,沸石粉70～84kg，水151～187kg，砂797～904，陶粒797～951kg，减水剂5.87～7.27kg；上述减水剂为广州滴天鑫建材科技有限公司生产的DXTR‑9型聚羧酸高性能减水剂。本发明混凝土具有低水化热、保温特点以及能增加混凝土的结构黏度，防止冻结圈出现漏水现象，同时降低工程成本。
Sprayed concrete structure suitable for pipe roofing freezing method
According to the sprayed concrete structure suitable for the pipe roof freezing method, a layer of frozen soil ring is evenly distributed on the periphery of a tunnel excavation face, a plurality of steel pipes arranged in the tunnel direction are evenly distributed and embedded in the frozen soil ring to form a steel pipe roof, and a steel arch, sprayed concrete and a steel bar hanging net are sequentially arranged on the inner side face of the frozen soil ring; the sprayed concrete is prepared from the following components: 335 to 441 kg of cement, 70 to 84 kg of zeolite powder, 151 to 187 kg of water, 797 to 904 kg of sand, 797 to 951 kg of ceramsite and 5.87 to 7.27 kg of a water reducing agent, the water reducing agent is a DXTR-9 type polycarboxylic acid high-performance water reducing agent produced by Guangzhou Tianxin building material science and technology Co., Ltd. The concrete has the characteristics of low hydration heat and heat preservation, the structural viscosity of the concrete can be increased, the water leakage phenomenon of a freezing ring is prevented, and meanwhile, the engineering cost is reduced.
一种适用于管幕冻结法的喷射混凝土结构，隧道开挖面外围均布设置有一层冻土圈，且冻土圈内均布嵌设有若干沿隧道方向布置的钢管而构成钢管管幕，冻土圈内侧面上依次设有钢拱架、喷射混凝土以及钢筋挂网；所述喷射混凝土中各组分组成为：水泥335～441kg,沸石粉70～84kg，水151～187kg，砂797～904，陶粒797～951kg，减水剂5.87～7.27kg；上述减水剂为广州滴天鑫建材科技有限公司生产的DXTR‑9型聚羧酸高性能减水剂。本发明混凝土具有低水化热、保温特点以及能增加混凝土的结构黏度，防止冻结圈出现漏水现象，同时降低工程成本。
Sprayed concrete structure suitable for pipe roofing freezing method
一种适用于管幕冻结法的喷射混凝土结构
SUN WENHAO (author) / HE YINGDAO (author) / USHINO (author) / LIU BIN (author) / ZHANG JUNRU (author) / YAO JIE (author) / KONG CHAO (author)
2023-01-31
Patent
Electronic Resource
Chinese
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