水利水电技术2017，Vol.48Issue(7)：64-67,73,5.DOI:10.13928/j.cnki.wrahe.2017.07.011
秦岭特长隧洞超埋深强构造应力大变形处理技术研究
Study on technologies for treatment of large deformation of extra-long Qinling Tunnel under super buried depth and strong tectonic stress
摘要
Abstract
With the total length of 81.779 km,the extra-long Qinling Water Delivery Tunnel for Hanjiang River-to-Weihe River Water Diversion Project passes through the middle-low mountainous area of the South of Qinling Mountain under a complicated geological condition;i.e.over-developed fracturing structure and strong tectonic stress.Under the impacts from the complicated geological condition and geological structure therein,the large deformations with various scales occur during the construction of the main tunnel of the No.1 exploration-test tunnel for the construction of Qinling Water Delivery Tunnel,for which the original design classification of the surrounding rock is Class Ⅲ,but it reaches Class Ⅳ and Class Ⅴ during the actual construction,thus deformation is quite serious after the completion of the initial support.The deformation amounts at many locations are over 10 mm/d and the maximum local deformation amount reaches 69 cm,and then the deformation brings great difficulty to the construction.For those largely deformed tunnel sections,the control measures,such as secondary cover-arch,prolonged anchor rod,radial grouting,secondary lining,etc.,are adopted.During the design and construction of the largely deformed tunnel sections in the days to come,the large deformation must be prevented through strengthening the advanced geological prediction and monitoring survey,raising the design parameters of support and enlarging reserved deformation amount.关键词
秦岭特长输水隧洞/超埋深/强构造应力/大变形/处理技术/引汉济渭工程Key words
extra-long Qinling Water Delivery Tunnel/super buried depth/strong tectonic stress/large deformation/treatment technology/Hanjiang-to-Weihe River Valley Water Diversion Project分类
交通工程引用本文复制引用
王江..秦岭特长隧洞超埋深强构造应力大变形处理技术研究[J].水利水电技术,2017,48(7):64-67,73,5.基金项目
国家重点研发计划项目(2016YFC0401805) （2016YFC0401805）
陕西省引汉济渭工程建设有限公司科研项目(引汉建函[2014]93号) （引汉建函[2014]93号）
