Abstract: Focusing on the risks associated with the parallel construction of three-line tunnels, this study, based on the Suzhou Metro Line 8 project, adopts a construction sequence where the middle line is excavated first, followed by the two side lines. Through field measurements, it analyzes the variation patterns of surface vertical displacement caused by the parallel shield tunneling of the three lines and investigates the impact of tunneling parameters such as earth chamber pressure and cutterhead torque on surface vertical displacement. The results indicate that: longitudinally, surface settlement during three-line construction initially uplifts to a maximum value, then settles, and eventually stabilizes; laterally, the maximum settlement occurs along the axis of the middle tunnel, decreasing towards both sides. Earth chamber pressure, grouting volume, and grouting pressure significantly affect surface settlement. Effective control of surface settlement can be achieved by maintaining the earth chamber pressure within the range of 0.18—0.21 MPa, grouting pressure within 0.20—0.24 MPa, and grouting volume at 1.5 to 1.8 times the theoretical gap volume. Both earth chamber pressure and cutterhead torque are positively correlated with the total thrust of the shield machine, but there is no direct relationship between earth- 引用格式:何梦腾,潘浩文,邓洪兴,等.基于点云多尺度方向一致性的羊只体尺测量方法［J］.河北大学学报(自然科学版),2026,46(2):113-127.引用格式:程姿洋,丁嘉浩,王加辉,等.三线近距并行盾构隧道施工地表竖向位移［J］.河北大学学报(自然科学版),2026,46(2):151-159.DOI:10.3969/j.issn.1000-1565.2026.02.004三线近距并行盾构隧道施工地表竖向位移程姿洋¹,丁嘉浩²,王加辉²,张佳旭¹,杨平²,丁程² (1.中交一公局第八工程有限公司,天津 300170;2. 南京林业大学 土木工程学院,江苏 南京 210037)摘 要:针对三线盾构隧道并行施工风险,依托某市地铁8号线工程,采用“先中线后两边”的三线施工顺序.通过现场实测分析三线并行盾构施工引起的地表竖向位移变化规律,研究土仓压力、刀盘扭矩等掘进参数对地表竖向位移的影响.结果表明:三线施工引起的地表沉降在纵向上先隆起至最大值,然后沉降,最终趋于稳定;横向上中线隧道轴线处沉降最大,向两侧递减;土仓压力、注浆量和注浆压力对地表沉降影响显著,将土仓压力控制在0.18~0.21 MPa、注浆压力控制在0.20~0.24 MPa、注浆量控制在理论间隙的1.5~1.8倍时,可有效控制地表沉降;土仓压力、刀盘扭矩均与盾构总推力呈正相关,但土仓压力与刀盘扭矩之间无直接关联,注浆量与注浆压力呈正相关. 关键词:三线并行;地表竖向位移;掘进参数;土仓压力中图分类号:U45 文献标志码:A 文章编号:1000-1565(2026)02-0151-09DOI:10.3969/j.issn.1000-1565.2026.02.004Vertical surface displacement during construction of three-line closely-spaced parallel shield tunnelsCHENG Ziyang¹, DING Jiahao², WANG Jiahui², ZHANG Jiaxu¹, YANG Ping², DING Cheng²(1. The Eighth Engineering Co., Ltd. of the First Highway Engineering Bureau of CCCC, Tianjin 300170, China;2. College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China)Abstract: Focusing on the risks associated with the parallel construction of three-line tunnels, this study, based on the Suzhou Metro Line 8 project, adopts a construction sequence where the middle line is excavated first, followed by the two side lines. Through field measurements, it analyzes the variation patterns of surface vertical displacement caused by the parallel shield tunneling of the three lines and investigates the impact of tunneling parameters such as earth chamber pressure and cutterhead torque on surface vertical displacement. The results indicate that: longitudinally, surface settlement during three-line construction initially uplifts to a maximum value, then settles, and eventually stabilizes; laterally, the maximum settlement occurs along the axis of the middle tunnel, decreasing towards both sides. Earth chamber pressure, grouting volume, and grouting pressure significantly affect surface settlement. Effective control of surface settlement can be achieved by maintaining the earth chamber pressure within the range of 0.18—0.21 MPa, grouting pressure within 0.20—0.24 MPa, and grouting volume at 1.5 to 1.8 times the theoretical gap volume. Both earth chamber pressure and cutterhead torque are positively correlated with the total thrust of the shield machine, but there is no direct relationship between earth- 收稿日期:2024-12-10;修回日期:2025-07-01 基金项目:国家自然科学基金项目(42101127) 第一作者:程姿洋(1988—),男,中交一公局第八工程有限公司高级工程师,主要从事地下工程施工方向研究. E-mail: 648624113@qq.com 通信作者:杨平(1964—),男,南京林业大学教授,博士生导师,主要从事环境岩土工程与城市地下工程方向研究. E-mail: yangping@njfu.edu.cn 第2期程姿洋等:三线近距并行盾构隧道施工地表竖向位移河北大学学报(自然科学版) 第46卷chamber pressure and cutterhead torque, grouting volume and grouting pressure are positively correlated.

Key words: parallel construction of three-line tunnels, surface vertical displacement, tunneling parameters, earth chamber pressure