摘要
为了降低米仓山地下风机房联络风道施工难度,加快施工进度,通过广泛调研国内外资料,提出取消二次衬砌的支护优化方案,并采用大型数值计算软件对联络风道施工过程进行了模拟,重点分析了联络风道开挖之后围岩的位移和应力变化,以及支护结构的受力情况及偏心距,论证了联络风道取消二衬的可能性。结果表明,在隧址区围岩较好时,可以进行喷锚支护并取消二次衬砌,同时增加原有设计的喷射混凝土厚度,提高喷射混凝土强度。
In order to reduce the construction difficulty and speed up the construction progress of the connecting duct of the underground fan house in Micang Mountain, through extensive investigation of domestic and foreign data, the support optimization scheme of cancelling the secondary lining was put forward, and the construction process of the connecting duct was simulated by using large-scale numerical calculation software. The displacement and stress changes of the surrounding rock after the excavation of the connecting duct as well as the force condition and eccentricity of the support structure were analyzed. The possibility of cancelling the second lining of the connecting duct was demonstrated. The results show that when the surrounding rock of the tunnel site is steady, shotcrete-anchor support can be adopted and the secondary lining can be cancelled, and the original design of shotcrete thickness can be strengthened, and the strength of shotcrete can be improved.
作者
张睿
陶力铭
江俊杰
邓如勇
ZHANG Rui;TAO Li-ming;JIANG Jun-jie;DENG Ru-yong(Sichuan Chuanjiao Road & Bridge Co., Ltd., Deyang 618300, Sichuan, China;Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)
出处
《筑路机械与施工机械化》
2019年第6期66-69,共4页
Road Machinery & Construction Mechanization
基金
国家自然科学基金资助项目(51578460)
国家重点研发计划(2016YFC0802205)
关键词
隧道工程
单层衬砌
数值模拟
联络风道
tunnel engineering
single-layer lining
numerical simulation
connecting duct
