|Table of Contents|

Study on experiment and numerical simulation of capsule grouting in control of tunnel deformation(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2026年02期
Page:
141-152
Research Field:
桥隧工程
Publishing date:

Info

Title:
Study on experiment and numerical simulation of capsule grouting in control of tunnel deformation
Author(s):
XIE Dianyan1;  SU Dong1; 2; 3;  DENG Junrong1;  ZHENG Zhenji1
(1. College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, Guangdong, China; 2. State Key Laboratory of Intelligent Geotechnics and Tunnelling, Shenzhen University, Shenzhen 518060, Guangdong, China; 3. Key Laboratory of Coastal Urban Resilient Infrastructures of Ministry of Education, Shenzhen University, Shenzhen 518060, Guangdong, China)
Keywords:
capsule grouting;  tunnel deformation;  active control;  model test;  numerical simulation;  shielding effect
PACS:
TU411
DOI:
10.19815/j.jace.2024.09096
Abstract:
In order to study the mechanism and influencing factors of capsule grouting technology, a systematic capsule grouting model experiment was designed and conducted. Rubber balloons were used to simulate the capsule, and the influence of lateral capsule grouting expansion on tunnel deformation was studied. A numerical model was established using PLAXIS based on the experimental parameters of the model, and the mechanism of controlling tunnel deformation by capsule grouting technology was explored. The relevant factors affecting its performance were analyzed. A new concept of “shielding effect” was proposed based on model experiments, and its impact on the performance of capsule grouting technology was analyzed. The results show that capsule grouting expansion can cause changes of the internal forces of tunnel, thereby achieving the goal of controlling tunnel deformation. The deformation caused by lateral capsule grouting expansion is mainly manifested as horizontal deformation of the arch waist near the capsule side of the tunnel bending into the tunnel and vertical deformation of the arch crown uplift, with horizontal deformation greater than vertical deformation. When multiple capsules work simultaneously, the “shielding effect” can isolate the additional stress generated by the subsequent capsule grouting expansion. In engineering, this effect should be reasonably utilized to design the grouting sequence and installation position of the capsules to ensure more efficient and accurate control of tunnel deformation. When the grouting volume is fixed, the spacing and length of the capsule arrangement are set to be equivalent to tunnel diameter, and when the capsule inclination is set to 90 °, the efficiency of the capsule grouting technology is the highest.

References:

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Last Update: 2026-04-01