【摘要】 灌区续建配套与节水改造工程引水隧洞施工重难点分析及对策对隧洞施工规划组织具有十分重要的工程意义。为此，结合韩江粤东灌区续建配套与节水改造项目半洋隧洞引水工程施工重难点分析及对策实践案例展开分析研究。结果表明，了解工程概况，首先从施工重难点划分和施工重难点特征分析两个方面进行半洋隧洞引水工程施工重难点分析；同时围绕施工管理+盾构段刀盘易结泥饼+施工工期控制、穿越西山溪+穿越甬莞高速、穿越民房及低层厂区建筑与钻爆段断裂带及地下涌水量大+局部围岩破碎+隧洞塌顶+钻爆段通风排烟等方面对策实施引水隧洞施工重难点对策研究。可为类似灌区续建配套与节水改造工程引水隧洞施工重难点分析及对策研究提供借鉴参考。更多还原

【Abstract】 The analysis and countermeasures of the key and difficult points of diversion tunnel construction in irrigation area for continued supporting and water-saving transformation project are of great engineering significance to the construction planning and organization of tunnel. Therefore, an analysis and research on the practical case of the key and difficult points in the construction of the Half Yang Tunnel Water Diversion Project for the continued supporting and water-saving renovation of the Hanjiang Guangdong East Irrigation District will be carried out. The results show that to understand the project overview, the analysis of key and difficult points in the construction of the Half Yang Tunnel Water Diversion Project can be conducted from two aspects: the division of construction key and difficult points and the analysis of their characteristics. The key and difficult countermeasures for the construction of the diversion tunnel are studied in terms of construction management, shield construction section mud cake formation, construction schedule control, crossing Xishan Creek, crossing Yongguan Expressway, crossing residential buildings and low-rise factory buildings,fractured zones and large underground water inflow in drilling and blasting sections, local rock fragmentation, tunnel collapse,ventilation and smoke extraction in drilling and blasting sections It can provide reference for the analysis and countermeasures of the key and difficult points of diversion tunnel construction in irrigation area for continued supporting and water-saving transformation project更多还原