超大直径盾构隧道下穿既有地下结构群变形影响机制及遮帘阻隔效应

doi:10.3973/j.issn.2096-4498.2025.11.004

隧道建设（中英文） ›› 2025, Vol. 45 ›› Issue (11): 2018-2032.DOI: 10.3973/j.issn.2096-4498.2025.11.004

超大直径盾构隧道下穿既有地下结构群变形影响机制及遮帘阻隔效应

韩凯航^{1, 2}，李岩松^{1, 2}，陈湘生^{1, 2, *}，包小华^{1, 2}，金银富^{1, 2}，苏栋^{1, 2}，赵晓峰³，陈炜韬³，蒋曦⁴

(1. 极端环境岩土和隧道工程智能建养全国重点实验室，广东深圳 518060； 2. 滨海城市韧性基础设施教育部重点实验室（深圳大学），广东深圳 518060； 3. 中国电建集团成都勘测设计研究院有限公司，四川成都 610072； 4. 同济大学土木工程学院地下建筑与工程系，上海 200092)

出版日期:2025-11-20 发布日期:2025-11-20
作者简介:韩凯航（1989—），男，山西长治人，2017年毕业于北京交通大学，隧道与地下工程专业，博士，特聘研究员，现从事城市地下空间韧性评估与提升研究工作。E-mail： hankaihang@szu.edu.cn。*通信作者: 陈湘生, E-mail: chenxs@szu.edu.cn。

Deformation Impact Mechanism and Curtain Barrier Effect of a Super-Large-Diameter Shield Tunnel Crossing Beneath Existing Underground Structural Clusters

HAN Kaihang^{1, 2}, LI Yansong^{1, 2}, CHEN Xiangsheng^{1, 2, *}, BAO Xiaohua^{1, 2}, JIN Yinfu^{1, 2}, SU Dong^{1, 2}, ZHAO Xiaofeng³, CHEN Weitao³, JIANG Xi⁴#br#

(1. State Key Laboratory of Intelligent Geotechnics and Tunnelling, Shenzhen 518060, Guangdong, China; 2. Key Laboratory of Coastal Urban Resilient Infrastructures (MOE), Shenzhen University, Shenzhen 518060, Guangdong, China; 3. PowerChina Chengdu Engineering Corporation Limited, Chengdu 610072, Sichuan, China; 4. Department of Geotechnical Engineering College of Civil Engineering, Tongji University, Shanghai 200092, China)

Online:2025-11-20 Published:2025-11-20

摘要/Abstract

摘要： 为探究超大直径盾构隧道下穿既有地下结构群的相互作用机制，以成都市典型地层条件为背景，利用Plaxis-3D软件模拟新建双华路隧道下穿既有成都地铁10号线和成贵高铁隧道结构，揭示超大直径盾构隧道下穿既有地下结构群的变形影响机制及遮帘阻隔效应。研究结果表明： 1）在设计埋深为2.4D（D为洞径）及不采取任何加固措施时，既有地下结构群沉降均超过规范限值；通过增加新建隧道埋深，既有地下结构群沉降减小，当埋深增加2D时，沉降减小至规范限值之内；通过采用180°和360°注浆措施对新建隧道周围土体进行加固时，既有地下结构群沉降明显减小，180°注浆加固可将沉降控制在规范限值之内，360°注浆的沉降控制效果最好。2）成贵高铁隧道的直墙拱形断面在开挖过程中底板变形最为明显，底板左右两侧底脚处横向位移变形曲线几乎重合，竖向位移随着下穿进程呈现交错领先现象。3）既有成都地铁10号线的圆形断面椭圆率整体呈下降趋势，在与新建隧道接近时下降最为明显，在远离时逐渐趋于不变。4）通过比较既有地铁隧道仅存在单线时的断面椭圆率变化可以看出，既有地下结构群的断面椭圆率下降程度均有所减小，表明隧道群间的相互作用使得既有地下结构群受新建隧道下穿的影响有所下降，即存在遮帘阻隔效应。

关键词: 超大直径盾构隧道, 既有地下结构群, 近接施工, 遮帘阻隔效应, 断面椭圆率, 数值模拟

Abstract: Herein, the Plaxis-3D software is employed to simulate the Shuanghua road tunnel crossing beneath the existing Chengdu metro line 10 and the Chengdu-Guiyang high-speed railway tunnel structures within typical Chengdu strata, revealing the deformation impact mechanisms and curtain barrier effect of a large-diameter shield tunnel undercrossing existing underground structure clusters. The research findings are summarized as follows: (1) At a design burial depth of 2.4D (where [D denotes the tunnel diameter) and without any reinforcement measures, the settlements of the existing structure clusters exceed the code-specified limits. Increasing the burial depth of the newly built tunnel correspondingly reduces the settlements of the existing structures, bringing them to within the allowable limits when the burial depth is increased by 2D. The implementation of grouting measures (180° and 360° coverages) to reinforce the new large-diameter tunnel considerably decreases the settlements of the existing structure clusters. Compared to 180° grouting, 360° grouting provides the most pronounced settlement control effect. However, 180° grouting also effectively controls settlements within the allowable limits. (2) For the Chengdu-Guiyang high-speed railway tunnel with its straight wall-arch section, the most pronounced deformation during excavation occurs at the base slab. The lateral displacements at the bottom-left and bottom-right corners of the base slab are nearly coincident, whereas their vertical displacements alternate in precedence as the undercrossing progresses. (3) The ovality of the circular cross-section of the existing Chengdu metro line 10 tunnel shows an overall decreasing trend along the undercrossing. The decrease is most notable as the new tunnel approaches and gradually stabilizes as it moves away. (4) By comparing the ovality changes of the cross-section when only one metro tunnel exists, it can be observed that the degree of ovality decrease of the existing tunnel clusters reduces. This indicates that the interaction within the tunnel clusters diminishes the impact of the new tunnel′s undercrossing on the existing underground structure clusters, demonstrating the existence of a curtain barrier effect.

Key words: super-large-diameter shield tunnel, existing underground structural clusters, adjacent construction, curtain barrier effect, cross-sectional ovality, numerical simulation

韩凯航, 李岩松, 陈湘生, 包小华, 金银富, 苏栋, 赵晓峰, 陈炜韬, 蒋曦. 超大直径盾构隧道下穿既有地下结构群变形影响机制及遮帘阻隔效应[J]. 隧道建设, 2025, 45(11): 2018-2032.

HAN Kaihang, LI Yansong, CHEN Xiangsheng, BAO Xiaohua, JIN Yinfu, SU Dong, ZHAO Xiaofeng, CHEN Weitao, JIANG Xi. Deformation Impact Mechanism and Curtain Barrier Effect of a Super-Large-Diameter Shield Tunnel Crossing Beneath Existing Underground Structural Clusters[J]. Tunnel Construction, 2025, 45(11): 2018-2032.

[1]	杨乾, 李建铭, 胡彪, 张学富, 熊成余, 李林杰. 斜井热位差影响下的公路隧道施工通风优化研究——以中梁山瓦斯隧道为例 [J]. 隧道建设, 2025, 45(S1): 226-235.
[2]	黄书华. 复杂富水地层超大直径盾构隧道机械法联络通道施工关键技术与应用实践[J]. 隧道建设, 2025, 45(S1): 280-289.
[3]	蔡才武. 城际铁路垂直机械法竖井施工力学效应[J]. 隧道建设, 2025, 45(9): 1640-1648.
[4]	许有俊, 金辰宇, 张朝, 王楠. 基于密贴既有车站深基坑的反压土参数优化[J]. 隧道建设, 2025, 45(9): 1728-1741.
[5]	王磊, 杨哲, 董世卓, 孙长松, 王恒, 陈红蕾. 超大直径盾构隧道联络通道冻结法施工关键技术——以北京东六环改造工程为例[J]. 隧道建设, 2025, 45(9): 1791-1802.
[6]	李延喆, 宋远, 安刚建, 荣传新, 冯守中, 黄明利. 软岩大变形隧道让压耗能型波纹板接头构件轴压性能研究[J]. 隧道建设, 2025, 45(8): 1538-1548.
[7]	刘文俊, 凌同华, 蒋望涛, 江永志, 谭嘉诺. 寒区隧道全方位节能保温防冻方法研究[J]. 隧道建设, 2025, 45(7): 1272-1285.
[8]	庄俊, 赵树磊, 温斯逊, 郭亚林, 郭宗程, 郭春. 基于风速安全系数的交通隧道瓦斯分级标准优化研究[J]. 隧道建设, 2025, 45(7): 1328-1335.
[9]	楼凯峰, 彭丁茂, 包晓明, 郑儒, 郝晓菡. 复杂海域海底盾构隧道精细化地质探测技术——以甬舟高速复线金塘海底隧道工程为例[J]. 隧道建设, 2025, 45(7): 1336-1344.
[10]	薛亚东, 张庆雨, 郭永发, 丁文云, 杨进京, 康殿海. 长水机场下穿隧道悬臂掘进机施工路径规划及围岩损伤特征分析[J]. 隧道建设, 2025, 45(6): 1076-1089.
[11]	杨洪, 曾仲毅, 吴铭芳, 田娇. 公路隧道穿越小倾角高压瓦突煤层瓦斯抽排技术研究[J]. 隧道建设, 2025, 45(5): 982-991.
[12]	魏纲, 蔡浩然, 齐永洁, 冯国辉, 徐天宝. 盾构下穿引起围压改变对既有盾构隧道的影响研究[J]. 隧道建设, 2025, 45(4): 708-718.
[13]	黄俊, 安平, 董飞, 沈阳, 赵光, 陈喜坤. 河床冲淤作用下运营期水下大直径盾构隧道结构响应分析[J]. 隧道建设, 2025, 45(4): 719-729.
[14]	范奇, 林放. 考虑注浆粘结强度的注浆式榫槽接头抗弯性能数值模拟研究[J]. 隧道建设, 2025, 45(3): 532-538.
[15]	荣传新, 屠卓, 龙伟, 张润泽. 地下水渗流富水砂层竖井冻结温度场时空演化规律及敏感性分析[J]. 隧道建设, 2025, 45(2): 268-283.

超大直径盾构隧道下穿既有地下结构群变形影响机制及遮帘阻隔效应

Deformation Impact Mechanism and Curtain Barrier Effect of a Super-Large-Diameter Shield Tunnel Crossing Beneath Existing Underground Structural Clusters

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价