Research on effects of adjacent construction of new shield tunnel on longitudinal deformation of existent tunnel

被引：0
|
作者：
Lu D. [1 ]
Wang S. [1 ]
He C. [1 ]
Xia X. [1 ]
机构：
[1] Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu
来源：
Wang, Shimin (wangshimin@swjtu.cn) | 1600年 / Science Press卷 / 38期
关键词：
Adjacent construction; Analytical solution; Deformation in longitude; Shield tunnels;
D O I：
10.3969/j.issn.1001-8360.2016.10.015
中图分类号：
学科分类号：
摘要：
Based on the Mindlin solution and Loganathan formula, the elastic displacement field of soil caused by bulkhead additive thrust, friction force and ground loss between shield and soil was obtained by using numerical integration. The equilibrium differential equation of the load-induced deformation of existing tunnel was established by means of Pasternak foundation model, to obtain the additional displacement of the existing tunnel caused by the construction of new shield tunnel. The effects of shield tunneling in parallel, undercrossing and overlapping forms were analyzed by above analytical solution, and the adjacent construction of the three forms above was simulated in 3D model by using finite element software with consideration of step excavation, grouting at the tail, and face support process. At last, the comparison and analysis of the results of theoretical analysis, finite element numerical simulation and field monitoring showed good agreement among the three and verified the correctness of this theoretical method, which provides a new way to evaluate the effects of adjacent construction of the new shield tunnel on the safety of existent tunnel. © 2016, Editorial Office of Journal of the China Railway Society. All right reserved.
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页码：108 / 116
页数：8
相关论文
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