[1]邱明明,杨果林,段君义,等.近距双线盾构隧道开挖诱发地层变形演变规律及数值模拟[J].自然灾害学报,2021,30(01):060-69.[doi:10.13577/j.jnd.2021.0106]
 QIU Mingming,YANG Guolin,DUAN Junyi,et al.Evolution rules and numerical simulation of stratum deformation induced by close-spaced twin tunnels shield construction[J].,2021,30(01):060-69.[doi:10.13577/j.jnd.2021.0106]
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近距双线盾构隧道开挖诱发地层变形演变规律及数值模拟
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
30
期数:
2021年01期
页码:
060-69
栏目:
出版日期:
2021-02-28

文章信息/Info

Title:
Evolution rules and numerical simulation of stratum deformation induced by close-spaced twin tunnels shield construction
作者:
邱明明1 杨果林2 段君义2 张沛然2
1. 延安大学 建筑工程学院, 陕西 延安 716000;
2. 中南大学 土木工程学院, 湖南 长沙 410075
Author(s):
QIU Mingming1 YANG Guolin2 DUAN Junyi2 ZHANG Peiran2
1. School of Architectural Engineering, Yan’an University, Yan’an 716000, China;
2. School of Civil Engineering, Central South University, Changsha 410075, China
关键词:
隧道工程双线平行盾构数值模拟现场实测地层变形预测模型演变规律
Keywords:
tunnel engineeringtwin parallel shieldnumerical simulationfield measurementstratum deformationprediction modelevolution rules
分类号:
U455.43;X9
DOI:
10.13577/j.jnd.2021.0106
摘要:
双线平行隧道盾构施工相互扰动作用对其诱发的地层变形分布特征和演变规律影响显著。以某地铁双线盾构隧道工程为例,考虑双线平行隧道间距与盾构施工相互作用影响,采用数值模拟和现场实测相结合的方法对双线平行隧道盾构施工引起的地层变形演变规律进行了对比分析,并提出了考虑近远距状态的双线平行隧道盾构施工地层变形预测模型。研究结果表明,双线盾构隧道施工地层竖向变形曲线由"V"形发展为非对称"W"形分布,沉降槽宽度由6D扩大为10D,地层深度越深非对称"双峰"特征越明显;地层水平变形曲线以两隧道中线为轴线呈反对称分布,两隧道间区域土体变形受施工扰动影响显著;地表沉降曲线分布随双线隧道近远距变化由深"V"形—浅"V"形—"U"形—浅"W"形—深"W"形—两独立"V"形演变,采用Lcr=2CKH可作为双线平行盾构隧道近远距状态临界判据,本文提出的预测模型能较好地反映近远距状态及施工相互扰动对双线平行隧道盾构施工地层变形的影响规律。研究成果可为类似地铁隧道盾构施工变形预测与精细化控制提供科学参考。
Abstract:
The influence of the mutual disturbance of twin tunnels shield construction on the distribution characteristic and evolution rules of the stratum deformation are significant. On the basis of the case study of the twin parallel shield tunnels of subway, considering the critical distance and the interaction effects of twin shield construction. Adopting numerical simulation method to analyze the evolution rules of stratum deformation caused by twin shield construction and combining with the actual measurement date, and the prediction model of stratum deformation caused by twin shield tunnels construction was put forward consider the critical distance. The results show that the stratum vertical deformation curve is developed into an asymmetrically "W" shape from the "V" shape when the twin tunnels excavated successively. The range of settlement trough is increased from 6D to 10D, and the more obvious is the "W" shape settlement curve characteristic with the stratum depth increasing. The stratum horizontal deformation curve is the asymmetric distribution, and the soil deformation is greatly influenced by construction disturbance in the middle of twin tunnels. The shape of surface settlement curve successively transformed from deep "V" shape, shallow "V" shape, "U" shape, shallow "W" shape, deep "W" shape and then to two independent "V" shape with the critical distance of twin tunnels, and using Lcr=2CKH can be considered as the criterion of critical distance for the twin parallel shield tunnels. The prediction model proposed in this paper can better reflect the influence rules of critical distance state and mutual disturbance on stratum deformation caused by twin tunnels shield construction. The research provides reference for similar subway tunnel shield construction deformation prediction and refinement control.

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备注/Memo

备注/Memo:
收稿日期:2020-03-07;改回日期:2020-08-03。
基金项目:国家自然科学基金面上项目(51778641);陕西省自然科学基础研究计划资助项目(2019JQ-834);陕西省教育厅科研计划资助项目(19JK0963);延安市重点研发计划项目(2019ZCSY-006);延安大学科研计划资助项目(YDBK2017-32,YDZ2019-08,YDY2020-36)
作者简介:邱明明(1985-),男,讲师,博士,主要从事岩土工程、隧道及地下工程方面的研究.E-mail:sxdfqiuming@163.com
通讯作者:杨果林(1963-),男,教授,博士,主要从事岩土工程、道路与铁道工程方面的研究.E-mail:guoling@mail.csu.edu.cn
更新日期/Last Update: 1900-01-01