龙昌公路隧道Ⅳ级围岩大断面机械化施工技术

为解决我国公路隧道建设中存在的以人工作业为主、施工机械化程度低、工序循环时间长、施工进度缓慢、安全风险高等问题，以贵黄高速龙昌隧道施工为例，结合中国的隧道规范与欧洲新奥法设计理念，对龙昌隧道采用大断面法进行施工，提出“9+N”设备高度配合隧道建设施工系统及其施工技术，即三臂凿岩台车、拱架锚杆安装台车等9种专用隧道施工机械设备与多功能地质钻机、全自动注浆机等多种辅助隧道施工机械设备搭配，采用相应机械化施工技术，无间隙地进行隧道施工。结果表明，“9+N”施工技术改善了隧道施工作业大量依赖人工的现状，提高了隧道施工的机械化程度、工作效率和安全性，降低了隧道施工人员数量，减小了施工对环境的影响，保证了隧道的施工质量。

Mechanized Construction Technology for Large Cross sectionLongchang Highway Tunnel in Grade Ⅳ Surrounding Rock

The construction of highway tunnels in China is characterized by manual operation, low mechanization degree, long process cycle time, slow construction progress and high safety risk. Hence, large cross section construction method is proposed for Longchang Tunnel on Guiyang Huangping Expressway based on Chinese standards and the design concept of NATM in Europe. The "9+N" equipments, i.e. triple boom rock drilling jumbo, arch anchor installation trolley, etc. + multi functional geological drilling machine and automatic grouting machine, etc.〖KG-*3〗, and corresponding construction technologies are adopted to carry out seamless tunnel construction. The results show that "9+N"construction technology recommended can reduce the labor consumption and impact on surrounding environment, improve the mechanization degree and construction efficiency, and guarantee the construction safety and quality.