干喷和湿喷工艺在超大跨度隧道中的应用对比  

Comparative of dry spraying and wet spraying technology in construction of super long-span highway tunnel

作　　者：高拴存 屈长发 杨超 Gao Shuancun;Qu Changfa;Yang Chao(Fourth Engineering Co.,Ltd.of CCCC Second Highway Engineering Co.,Ltd.,Luoyang 471000,China)

机构地区：[1]中交二公局第四工程有限公司,河南洛阳471000

出　　处：《山西建筑》2023年第1期168-171,共4页Shanxi Architecture

摘　　要：隧道在初期支护阶段的喷射混凝土工艺主要分为干喷和湿喷工艺。以杏花村1号隧道为工程实例,对干喷和湿喷工艺在超大跨度公路隧道施工中的应用进行了对比分析。研究结果表明:在每延米条件下,湿喷工艺的混凝土设计量比干喷少了1.03 m^(3),实际喷射量比干喷少了1.48 m^(3);在每延米条件下,湿喷工艺的混凝土损耗率比干喷降低了6.71%;干喷和湿喷工艺存在各自的优缺点,应根据现场施工情况选择合适的喷射混凝土工艺。The shotcrete technology of tunnel in the initial supporting stage is mainly divided into dry spraying and wet spraying technology. Taking Xinghuacun No.1 tunnel as an example, the dry spraying and wet spraying technology was analyzed in the construction of super long-span highway tunnels. The results show that: under each per metre condition, the concrete design volume of the wet spraying technology is 1.03 m^(3) less than the dry spraying, and the actual injection volume is 1.48 m^(3) less than the dry spraying. Under each per metre condition, the concrete loss rate of wet spraying is 6.71% lower than that of dry spraying. The dry spraying and the wet spraying have their own advantages and disadvantages, so appropriate spraying technology should be selected according to the site construction situation.

关 键 词：干喷工艺 湿喷工艺 超大跨度公路隧道 损耗率 

分 类 号：TU921[建筑科学—建筑设计及理论]