河床冲洪积覆盖层箱涵与引水隧洞明暗结合部开挖与支护方法
Excavation and Support Methods for the Intersection of Box Culverts and Water Diversion Tunnels in the Overflow Layer of the River Bed
王正达 1熊俊才 1王峰 1马庆楠 1张采贤 1杨雪1
作者信息
- 1. 中国水利水电第十四工程局有限公司,云南 昆明 650041
- 折叠
摘要
引水工程在遇两侧山体中间夹河道的情况下,通常采用河床区箱涵与山体内隧洞连接的形式通过.河道的河床区往往存在较深且透水性强的冲洪积覆盖层,当箱涵与引水隧洞明暗结合部布置在覆盖层中时,为保证施工安全及质量,必须采取有效的开挖与支护方法,其中箱涵基坑降排水、箱涵分层开挖与支护、结合部预加固、隧洞超前支护与洞身开挖等重要程序必须制定完善的施工方法,并严格执行.通过隧洞围岩变形监测,该工程开挖与支护方法合理有效.
Abstract
When encountering a river channel sandwiched between the mountains on both sides,the water diversion project usually adopts the form of connecting the riverbed box culvert with the tunnel inside the mountain.The riverbed area of a river often has a deep and highly permeable alluvial cover layer.When the junction of box culvert and diversion tunnel is arranged in the covering layer,effective excavation and support methods must be adopted to ensure construction safety and quality.Important procedures such as drainage of box culvert foundation pit,layered excavation and support of box culvert,pre reinforcement of junction,advanced support of tunnel and excavation of tunnel body must be developed and strictly implemented.Through deformation monitoring of tunnel surrounding rock,the opening and support methods of this project are reasonable and effective.
关键词
冲洪积覆盖层/明暗结合/箱涵/引水隧洞/开挖与支护Key words
alluvial and alluvial cover layer/combining light and dark/box culvert/water diversion tunnel/excavation and support引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据