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论文抢“鲜”看 | 南京大学刘春教授团队— 盾构隧道管片接头变形监测:室内试验与离散元模拟

  • 2026-04-16 04:11:02
论文抢“鲜”看 | 南京大学刘春教授团队— 盾构隧道管片接头变形监测:室内试验与离散元模拟

Deformation monitoring at shield tunnel joints: Laboratory test and discrete element simulation

盾构隧道接缝变形监测:室内试验与离散元模拟

Maoyi Mao, Xiaowei Yang, Chun Liu*, Tao Zhao, Hui Liu

在城市地下空间的安全运营中,盾构隧道如“地下长城”般支撑着城市的运行命脉。然而,隧道在荷载作用下管片间的位移变形如何精准监测,一直是工程实践中的难点。以往技术可测应变,却难换算为位移,限制了预警能力。本研究创新融合光频域反射技术离散元数值模拟,首次将光纤材料引入离散元建模,提出管片剪切与沉降过程的应变‑位移定量计算方法,实现从“感知”到“计算”的关键突破。该方法已通过实验验证,展现出良好的工程应用前景,为推动隧道结构智能监测与安全预警提供了新的技术路径。

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01

本文简介:

盾构隧道由若干管片组成,在城市地下工程中应用广泛。当隧道受到荷载作用时,相邻管片之间会发生相对位移。过去,人们采用分布式光纤传感技术进行应变监测,但目前迫切需要解决如何将应变转化为位移的问题。本研究在室内试验中应用了光频域反射技术,针对盾构隧道管片的剪切过程和中心沉降过程,提出了两种定量计算方法以进行定量分析。同时,利用离散元数值分析方法对室内试验过程进行了数值模拟,并创新性地将光纤这种非典型岩土材料应用于离散元建模与数值模拟中。结果表明,百分表的实测位移、数值模型的计算结果以及根据光纤数据定量计算得到的位移总体上具有较好的一致性。后两种方法有望应用于盾构隧道接头变形监测的工程实践中,但还需要进一步进行详细的校准和调整。

02

本文亮点: 

  • 光学频域反射计技术被应用于实验室条件下的隧道管片错台监测。

  • 提出了两种原创性的计算方法,用于量化相邻隧道管片之间的变形,并对盾构隧道管片在荷载作用下的位移进行定量监测。

  • 建立了离散元模型,并利用本团队自主研发的创新型高性能离散元软件 MatDEM,对两种不同的变形过程进行了数值模拟。

03

代表性图表:

图2(a)三维堆叠模型(b、c)单元之间的法向弹簧和切向弹簧

图 4 (a)试验装置示意图,(b)管道横截面上光纤的位置,(c)中心沉降试验示意图,(d)剪切试验示意图

图5(a)中心沉降试验和(b)剪切试验

图10 剪切试验和中心沉降试验的离散元模型

图16 中心沉降试验的定量计算结果

04

结论:

本研究提出了一种隧道接头处剪切过程和中心沉降过程位移的定量计算方法。设计了两种工况下的室内试验,并对试验过程进行了离散元数值模拟。研究结论如下:

1.  光频域反射(OFDR)分布式光纤传感技术具有高分辨率的特点,将其应用于隧道变形监测过程是可行的,可对隧道连接处的位移进行定量监测。

2.  本研究提出了一种基于颗粒离散元法(DEM)的弹性团簇模型,建立了三维隧道模型。

3.  将由非典型岩土材料制成的光纤应用于离散元建模和数值模拟中,数值模拟结果能够准确反映模拟过程中的应变分布情况。

4.  剪切试验和中心沉降试验的定量计算方法是可行的。

5.  两种试验中,接头周围变形区的长度均在0.16米左右。

6.  对于穿过接头的光纤,在中心沉降过程中,应变会在0.4厘米范围内达到峰值,而在基于离散元模拟的剪切试验中,应变达到最大值所需的时间更长。

在剪切试验和中心沉降试验中,定量计算得到的位移略小于百分表的实测位移。因此,光频域反射分布式光纤传感的精度以及隧道接头处变形的离散元模拟精度均有待提高。

05

参考文献

Maoyi Mao, Xiaowei Yang, Chun Liu*, Tao Zhao, Hui Liu. Deformation monitoring at shieldtunnel joints: laboratory test and discrete elementsimulation. Deep Underground Science and Engineering. 2025;4(1):149‐157. doi:10.1002/dug2.12092

06

三个关键的未来研究方向(供领域学者学术传播与战略规划参考):

1. 提升分布式光纤传感技术的精度与智能化水平

2. 深化离散元数值模拟的多物理场耦合与应用扩展

3. 构建一体化智能监测系统与标准化数据库

这些方向突出了从技术优化到系统集成的递进路径,呼吁学者共同探索,以提升隧道安全运维的智能化水平。

07

作者简介:

刘春

刘春,教授,博导,地质工程教研室主任,国家优青,中国岩石力学与工程学会兼职副秘书长和青委会副主任,国际岩石力学与岩石工程学会 (ISRM) 中国国家小组副主席,《岩石力学与工程学报》期刊编委等。2012年博士毕业于南京大学,后在斯坦福大学开展博士后研究。主要从事计算工程地质研究,在岩土离散元理论研究,系统研发和工程应用方面取得成果。近年来主持国家自然科学基金(5项),国家重点研发计划课题,及省部级科研项目20余项。已发表学术论文100余篇,论文SCI他引3000余次;出版中英文专著各1 部;主讲课程入选江苏首批省级一流本科课程;已申请和获得国家发明专利20余项,PCT国际专利2项,软件著作权10余项。2016年获工程地质“谷德振青年科技奖”;2017年入选中国科协“青年人才托举工程”;2019年入选江苏省六大人才高峰高层次人才,自主研发的高性能离散元软件MatDEM获“中国数字仿真自主软件创新奖”;2022年获“钱七虎奖”;2023年获江苏专利银奖(排名1),教育部自然科学奖一等奖(排名4)。

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  1. CONNECT:[ UseTime:0.000943s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000936s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000347s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000278s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000485s ]
  6. SELECT * FROM `set` [ RunTime:0.000195s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000685s ]
  8. SELECT * FROM `article` WHERE `id` = 532585 LIMIT 1 [ RunTime:0.000795s ]
  9. UPDATE `article` SET `lasttime` = 1776947985 WHERE `id` = 532585 [ RunTime:0.004776s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000672s ]
  11. SELECT * FROM `article` WHERE `id` < 532585 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001066s ]
  12. SELECT * FROM `article` WHERE `id` > 532585 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002322s ]
  13. SELECT * FROM `article` WHERE `id` < 532585 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001704s ]
  14. SELECT * FROM `article` WHERE `id` < 532585 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002390s ]
  15. SELECT * FROM `article` WHERE `id` < 532585 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002238s ]
0.103864s