Influences of riverbed erosion on deformation of large cross-section underwater tunnels
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摘要: 河床冲刷是水下隧道长期运营中面临的一个新问题。受径流量变化、河床泥沙条件等因素影响,上覆河床冲刷会导致隧道埋深和荷载变化,使其产生不均匀变形,影响隧道安全。本研究围绕河床冲刷下大断面过江隧道的变形响应问题,采用离心试验研究多次冲刷后隧道变形发展进程,分析了内部衬砌增大结构刚度来抵抗冲刷卸载变形的机理;分析了不同冲刷深度下隧道变形增长的非线性行为,揭示了冲刷过程中淤泥质地层对隧道变形的不利影响;分析了河道冲刷引起的盾构管片衬砌环缝张开变形特征,明确了内部衬砌有利于避免管片衬砌环缝张开的不利影响。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.
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Keywords:
- shield tunneling /
- underwater tunnel /
- riverbed erosion /
- unload /
- deformation
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表 1 离心模型试验模拟工况
Table 1 Cases of centrifugal model tests
工况 极限冲深/m 单次冲深/m 衬砌方案 现状埋深/m 1-1 24 8 有内衬 43.2 1-2 24 8 无内衬 43.2 2-1 16 8 有内衬 27.8 2-2 16 8 无内衬 27.8 表 2 工况1和工况2试验土层参数
Table 2 Parameters of test soils for cases 1 and 2
工况 土层 按原型换算重塑土控制指标 孔隙比 相对密实度 干密度/(g·cm-3) 1 粉砂 0.78 0.32 1.52 粉土 0.95 0.38 1.39 细砂 0.65 0.55 1.57 粗砂 0.69 0.65 1.58 细砂 0.65 0.61 1.57 2 粉砂 0.78 0.32 1.52 淤泥质粉质黏土 1.14 — 1.26 粉土 0.65 0.55 1.36 细砂 0.65 0.61 1.57 粗砂 0.69 0.65 1.58 -
[1] 岳红艳, 谷利华, 张杰. 武汉汉江过江隧道河床演变及最大冲深预测[J]. 人民长江, 2010, 41(6): 35-39. doi: 10.3969/j.issn.1001-4179.2010.06.010 YUE Hongyan, GU Lihua, ZHANG Jie. Fluvial process and prediction of maximum erosion depth of riverbed in tunnel location across Hanjiang River[J]. Yangtze River, 2010, 41(6): 35-39. (in Chinese) doi: 10.3969/j.issn.1001-4179.2010.06.010
[2] 史英标, 鲁海燕, 杨元平, 等. 钱塘江河口过江隧道河段极端洪水冲刷深度的预测[J]. 水科学进展, 2008, 19(5): 685-692. doi: 10.3321/j.issn:1001-6791.2008.05.013 SHI Yingbiao, LU Haiyan, YANG Yuanping, et al. Prediction of erosion depth under the action of the exceptional flood in the river reach of a tunnel across the Qiantang estuary[J]. Advances in Water Science, 2008, 19(5): 685-692. (in Chinese) doi: 10.3321/j.issn:1001-6791.2008.05.013
[3] 罗维平. 航道开挖卸载及岸壁构筑加载对跨海盾构隧道的影响研究[D]. 北京: 北京交通大学, 2018. LUO Weiping. Study on the Influence of Channel Excavation and Shore Construction on the Cross-Sea Shield Tunnel[D]. Beijing: Beijing Jiaotong University, 2018. (in Chinese)
[4] 黄俊, 张顶立, 刘洪洲, 等. 航道疏浚对海底盾构隧道纵向稳定性的影响研究[J]. 岩石力学与工程学报, 2007, 26(11): 2363-2369. doi: 10.3321/j.issn:1000-6915.2007.11.025 HUANG Jun, ZHANG Dingli, LIU Hongzhou, et al. Study on influences of channel dredging on longitudinal stability of subsea shield tunnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(11): 2363-2369. (in Chinese) doi: 10.3321/j.issn:1000-6915.2007.11.025
[5] 吴世明, 王湛, 王立忠. 大断面过江隧道运营期受力变形健康监测分析[J]. 浙江大学学报(工学版), 2013, 47(4): 595-601, 608. doi: 10.3785/j.issn.1008-973X.2013.04.005 WU Shiming, WANG Zhan, WANG Lizhong. Monitoring and analysis of force and deformation of large section crossing-river tunnel during operation period[J]. Journal of Zhejiang University, 2013, 47(4): 595-601, 608. (in Chinese) doi: 10.3785/j.issn.1008-973X.2013.04.005
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