岩土工程学报2024，Vol.46Issue(z1)：107-111,5.DOI:10.11779/CJGE2024S10002
河床冲刷对大断面水下隧道变形影响
Influences of riverbed erosion on deformation of large cross-section underwater tunnels
摘要
Abstract
The riverbed erosion caused by runoff changes and sediment conditions has become a new problem for underwater tunnels during its long-term operation.The riverbed erosion overlying the tunnel can lead to changes in burial depth and load,which can cause significant uneven deformation and affect tunnel safety.This study focuses on the deformation response of large cross-section underwater tunnels caused by erosion.The centrifugal test method is used to study the deformation of tunnels caused by multiple erosions.According to the model tests,the internal lining increases the structural stiffness and resists deformation of tunnels caused by erosion unloading.The nonlinear growth of deformation with different erosion depths is analyzed.The muddy clay layer is unfavorable for deformation of tunnels during erosion development.The gap opening of shield segments caused by erosion is analyzed.The internal lining is beneficial for avoiding the disadvantage of segment opening.关键词
盾构/水下隧道/河床冲刷/卸载/变形Key words
shield tunneling/underwater tunnel/riverbed erosion/unload/deformation分类
建筑与水利引用本文复制引用
王乐明,罗基伟,张宇亭,孟庆余,左殿军,马志富,安晓宇,孟毅,赵跃..河床冲刷对大断面水下隧道变形影响[J].岩土工程学报,2024,46(z1):107-111,5.基金项目
国家重点研发计划项目(2022YFB2602800) （2022YFB2602800）
国家自然科学基金青年基金项目(52308401) （52308401）
中国国家铁路集团有限公司科技研究开发计划项目(K2022G057) （K2022G057）
