Research on Deformation Control of Power Shield Tunnels Undercrossing Rivers Based on Orthogonal Experimental Method

DOI

10.2991/978-94-6463-398-6_13How to use a DOI?

Keywords

Power shield; Cross the river; Numerical simulation; Strata deformation

Abstract

When the shield tunnel is constructed under the river, the shield machine is excavated in the water-rich sand layer with rich water content and strong permeability, and it is difficult to control the stratum disturbance deformation during construction. In this paper, based on the project of Xi’an 330kV power shield tunnel underpassing Bahe River, a three-dimensional fluid-solid coupling model of power shield tunnel underpassing Bahe River is established by using orthogonal test and numerical simulation. The sensitivity of soil pressure, grouting pressure and grouting layer thickness to stratum deformation is studied. The results show that the grouting pressure is the main influencing factor when the maximum ground settlement, the maximum vertical displacement and the maximum horizontal displacement of the stratum are taken as the evaluation indexes, while the sensitivity of grouting layer thickness and soil chamber pressure is small. Therefore, in the construction of river-crossing shield, the change of synchronous grouting pressure and grouting volume should be preferentially controlled according to the monitoring data and parameter feedback, and the parameters should be optimized and adjusted in time to control the deformation of the stratum.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Qingqu Fu
AU  - Xuanrong Zheng
AU  - Jiahui Qi
PY  - 2024
DA  - 2024/04/24
TI  - Research on Deformation Control of Power Shield Tunnels Undercrossing Rivers Based on Orthogonal Experimental Method
BT  - Proceedings of the 2023 5th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2023)
PB  - Atlantis Press
SP  - 121
EP  - 132
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-398-6_13
DO  - 10.2991/978-94-6463-398-6_13
ID  - Fu2024
ER  -