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作 者:吕祎晔 裴利华 林东 杨醒宇 桂跃[1] LYU Yiye;PEI Lihua;LIN Dong;YANG Xingyu;GUI Yue(Department of Architectural Engineering,Kunming University of Science and Technology,Kunming,Yunnan 650051,China;China Railway Fourth Institute Group Southwest Survey and Design Co.,Ltd.,Kunming,Yunnan 650504,China)
机构地区:[1]昆明理工大学建筑工程学院,云南昆明650051 [2]中铁四院集团西南勘察设计有限公司,云南昆明650504
出 处:《中外公路》2025年第2期212-220,共9页Journal of China & Foreign Highway
基 金:国家自然科学基金资助项目(编号:52068039);中铁四院重点研发项目(编号:QESP805R02)。
摘 要:新建盾构隧道近距离穿越容易引起临近既有隧道产生变形,如何依据地层条件合理设置掘进参数以控制环境变形至关重要。该文采用K-means聚类算法分析掘进参数和地表沉降之间的关联性,通过误差平方和(ESSE)对聚类质量进行度量并选取了最佳聚类簇数,对试验段现场监测数据进行聚类分析,得到3个聚类中心,最终提出了富水圆砾地层泥水平衡盾构施工最优掘进参数组合。结合实际下穿段参数设定值和既有隧道变形情况对最优参数组合进行了验证。结果表明:①富水圆砾地层中泥水平衡盾构施工最优的掘进参数组合为:平均扭矩2005 kN·m、推力14380 kN、掘进速度17.5 mm/min、进排泥浆流量差57 m³/h;②采取最优掘进参数组合后,近接下穿段既有隧道竖向变形控制在0.58 mm以内,达到了较为理想的变形控制效果。It is important to set reasonable tunneling parameters according to the ground conditions to reduce the deformation of existing tunnels,since the close crossing of new shield tunnels is likely to cause deformation in the adjacent existing tunnels.The K-means clustering algorithm was proposed to explore the correlation between tunneling parameters and surface settlement,and the optimal number of clusters was selected by using the sum of squared errors(ESSE)to measure the clustering quality.Through cluster analysis on the field monitoring data of the test section,three cluster centers were obtained.Finally,the optimal combination of tunneling parameters for mud-water balanced shield construction in water-rich round gravel strata was proposed.The optimal combination of tunneling parameters was verified by combining the parameter setting values of the actual underpass section and the deformation of the existing tunnel.The results show that①the optimal combination of tunnelling parameters for mud-water balanced shield construction in water-rich round gravel strata is an average torque of 2005 kN·m,a thrust of 14380 kN,a tunnelling speed of 17.5 mm/min,and a difference in inlet and outlet mud flow of 57 m3/h;②after the optimal combination of tunnelling parameters is adopted,the vertical deformation of the existing tunnel near the underpass section is controlled within 0.58 mm,which achieves a relatively ideal deformation control effect.
关 键 词:盾构隧道 近接施工 掘进参数 K-MEANS聚类 既有隧道沉降 参数优化
分 类 号:U455.43[建筑科学—桥梁与隧道工程]
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