[1]靳军伟,付柏毅,陈允斌,等.隧道Park收敛模式正交下穿既有隧道影响分析[J].郑州大学学报(工学版),2022,43(01):76-82.[doi:10.13705/j.issn.1671-6833.2022.01.012]
　JIN Junwei,FU Boyi,CHEN Yunbin,et al.Analysis of Existing Tunnels Deformation Induced by New Othogonal Tunneling Using Park Convergence Model[J].Journal of Zhengzhou University (Engineering Science),2022,43(01):76-82.[doi:10.13705/j.issn.1671-6833.2022.01.012]

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隧道Park收敛模式正交下穿既有隧道影响分析()

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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

43

期数:

2022年01期

页码:

76-82

栏目:

出版日期:

2022-01-09

文章信息/Info

Title:

Analysis of Existing Tunnels Deformation Induced by New Othogonal Tunneling Using Park Convergence Model

作者:

靳军伟¹; 付柏毅¹; 陈允斌²; 刘钢立³; 李明宇¹

郑州大学土木工程学院;山东正元建设工程有限责任公司;中铁十五局集团城市轨道交通工程有限公司;

Author(s):

JIN Junwei¹;  FU Boyi¹;  CHEN Yunbin²;  LIU Gangli³;  LI Mingyu¹

1.School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China; 

2.Shandong Zhengyuan Construction Engineering Co., Ltd., Jinan 250014, China; 3.China Railway 15th Bureau Group Urban Rail Transit Engineering Co., Ltd., Luo-yang 471000, China

关键词:

隧道开挖; 位移控制方法; 数值分析; 隧道收敛模式; 既有隧道

Keywords:

tunnel excavation;  displacement controlled method;  numerical analysis;  convergence model;  existing tunnels

分类号:

TU454

DOI:

10.13705/j.issn.1671-6833.2022.01.012

文献标志码:

A

摘要:

摘 要：针对传统力控制方法分析隧道正交下穿引起的地表和既有隧道变形过程复杂的问题，本文基于Park收敛模型，采用位移控制方法对隧道开挖引起的地表沉降以及既有隧道拱底变形进行研究。首先，通过将工程实例地表沉降数据、本文方法以及传统力控制方法的结果进行对比，验证了位移控制方法在研究新建隧道垂直下穿既有隧道的合理性，然后使用Park的四种隧道收敛模式作为新建隧道的边界条件进行进一步分析。结论 计算结果表明，在给定隧道拱顶位移g的情况下，Park的四种收敛模式引起的地表沉降槽、隧道拱底变形的形状和数值均存在一定差异。收敛模式对地表沉降和拱底变形的影响由大到小依次为BC-2、BC-3、BC-4、BC-1。其中BC-3与BC-4较为接近，BC-1与实际的拟合效果最差。

Abstract:

Due to the complexity of the traditional force controlled method in analyzing the deformation process of the ground and the existing tunnels caused by the orthogonal under-crossing of the tunnel, the displacement controlled method was adopted in this article to analyze the influence of tunnel excavation on the ground settlement and the longitudinal deformation of the arch bottom of the existing tunnels based on Park’s convergence model that described more realistic tunnel boundary deformation. Firstly, through the comparison of the mea-suring data with the calculation results of the method in this paper and the force controlled method, the feasibility of the displacement control method under newly built tunnels under-crossing existing tunnel was verified, and then the four tunnel convergence modes of Park were used as the boundary conditions on the new tunnel for further analysis. The comparison between the calculated results and the actual measurements showed that the results of the displacement control method for natural site settlement were very close to the measured data. The calculation results showed that, given the displacement of the tunnel vault g, there were certain differences in the shape and value of the ground settlement trough and the deformation of tunnel arch bottom caused by Park’s four convergence models. With the same soil loss and g value, the effects of convergence mode on surface settlement and the deformation of tunnel arch bottom were circular non-uniform convergence, elliptical convergence, elliptic non-uniform convergence, and uniform convergence in descending order. Among them, the effect of elliptical convergence and non-uniform convergence of ellipse was relatively close, while the uniform convergence and the actual measurements had the worst fitting effect. Surface settlement caused by tunnel construction and the deformation mode of existing tunnel was different, the surface settlement appeared as a Gaussian curve while the tunnel deformation may appear as a “W” shape when the distance between the tunnels was constant.

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