摘要
直径盾构因其开挖面积大,施工扰动明显。为研究某地铁区间大直径盾构隧道施工对上方的南水北调干渠的影响,采用有限元方法,对不注浆、环状注浆和三孔长注浆3种方案下干渠位移变化特征进行了详细分析。研究表明干渠以竖向位移为主,三孔长注浆控制效果最优,试验段结果验证了计算可靠性。得出的结论可为类似工程提供借鉴。
Due to the large excavation area of large diameter shield tunnel,the construction disturbance is obvious.In order to study the influence of a large-diameter shield tunnel crossing the main channel of the South-to-North water transfer project,trunk canal displacement caused by different schemes of no-grouting,annular grouting,and three-hole long grouting is analyzed in details with FEM method.The results show that the trunk canal displacement of South-to-North water transfer project is mainly vertical displacement.Compared with annular grouting,the control effect of three-hole long grouting is better.Therefore,three hole long grouting scheme is recommended.Finally,the monitoring results verifies the calculation accuracy.The conclusion may provide reference for similar geological conditions.
作者
侯效毅
许洋
赵彩俊
王跃
叶涛
HOU Xiaoyi;XU Yang;ZHAO Caijun;WANG Yue;YE Tao(Ranken Railway Construction Group Co.,Ltd.,Chengdu 610046,China;Agiletech Engineering Consultants Co.,Ltd.,Beijing 100037,China)
出处
《低温建筑技术》
2022年第11期119-124,共6页
Low Temperature Architecture Technology
关键词
大直径盾构
南水北调干渠
注浆加固
数值计算
large diameter shield
trunk canal of South-to-North water transfer project
reinforced by grouting
numerical analysis
