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- Title
注浆控制土体变形原位试验与隧道 竖向变形数值模拟研究.
- Authors
王均山; 赵林嵩; 张宗俊; 郑 刚; 程雪松
- Abstract
The foundation pit excavation may cause vertical deformation of adjacent tunnels to some extent. However, there is a lack of theoretical research on grouting to control tunnel deformation. To gain a comprehensive understanding of the deformation behavior of soil and tunnels caused by grouting and to explore more effective deformation control measures, a field test was conducted to investigate the soil deformation induced by grouting and the influence of soil and tunnels resulting from grouting was simulated. The test results show that, the largest horizontal deformation and excess pore water pressure of soil caused by grouting achieved at the end of grouting; while the deformation and excess pore water pressure decrease rapidly in the beginning. During segmented grouting, after the grouting at the lower part is completed, the slurry tends to flow upward, resulting in large soil deformation at the upper part. The vertical displacement of soil close to the grouting body attenuates faster. Furthermore, numerical simulation results demonstrate that when the same amount of slurry is injected at the same position, the soil experiences significantly greater deformation compared to the tunnel. After grouting, a substantial portion of the slurry flows upward, which leads to the reduction of potential impact on the deformation of the soil/tunnel below.
- Publication
Journal of Ground Improvement, 2024, Vol 6, Issue 1, p47
- ISSN
2096-7195
- Publication type
Article
- DOI
10.3785/j.issn.2096-7195.2024.01.007