| Issue |
E3S Web Conf.
Volume 618, 2025
6th International Symposium on Architecture Research Frontiers and Ecological Environment (ARFEE 2024)
|
|
|---|---|---|
| Article Number | 02020 | |
| Number of page(s) | 7 | |
| Section | Analysis of Construction Engineering and Material Characteristics | |
| DOI | https://doi.org/10.1051/e3sconf/202561802020 | |
| Published online | 27 February 2025 | |
Numerical Simulation of Visualized Grout Diffusion in Backfill-grouting of Shield Tunnel
1 College of Civil Engineering, Tongji University, Shanghai, 200092, China
2 Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
3 Zhejiang Institute of Communications Co., Ltd. Hangzhou, 310006, China
4 China Railway SIYUAN Survey and Design Group Co., Ltd. Wuhan, 430063, China
5 Xiamen Rail Transit Construction & Development Group Co., Ltd. Xiamen, 361000, China
* Corresponding author: zhouyihan@tongji.edu.cn
Synchronous grouting in shield tunnel construction plays a critical role in enhancing tunnel impermeability, ensuring precise alignment of segment rings, and mitigating surface settlement. Despite its importance, limited research has been conducted on the visualization of numerical simulations for grouting behind the shield tunnel wall. This study addresses this gap by simulating the grouting diffusion process during shield tunnel post-grouting using CFDEM software. The simulation results reveal that grout injected from the upper opening of the tunnel initially diffuses in a hemispherical pattern centered at the injection point and subsequently migrates downward along the outer diameter of the segment under the influence of gravity. Conversely, grout from the lower outlet rapidly fills the annular gap and transitions to a permeation diffusion phase. At a grouting volume of 100%, the slurry coverage area reaches 62.5%, with a slurry waste of 37.4%. When the grouting volume increases to 200%, the coverage area marginally improves to 73.1%. Balancing grouting effectiveness with construction costs, the optimal grouting effect is achieved at a grouting volume of 100%, as excessive grouting will not be greatly improved and leads to substantial material waste. To achieve complete grout coverage, particularly in unfilled regions at the tunnel head and sides, secondary grouting is recommended instead of further increasing the initial grouting volume. This approach minimizes material waste while maintaining construction efficiency.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.