We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Impact of Groundwater Fluctuations on the Stability of Super-Large-Diameter Caissons before and after Reinforcement.
- Authors
Dou, Leisi; Wang, Haitao; Li, Bin; Yang, Yulin; Di, Danyang
- Abstract
Super-large-diameter caissons, serving as working wells for trenchless pipe jacking technology, are being extensively constructed alongside the increasing adoption of trenchless technology in urban areas. However, being regarded merely as ancillary structures, the structural stability of a caisson during both construction and operation phases are often neglected. This study, centered on the super-large-diameter caissons within the Jinshui River flood control project in Zhengzhou, China, systematically monitored the mechanical behavior of caisson structures and surface settlement during construction and operational phases. Utilizing a validated FE method, the influence of groundwater fluctuations on the structural stability of caissons during operational phases was examined. Furthermore, potential occurrences of loose soil, voids, and caisson tilting were considered. Subsequently, the applicability of permeable polymer, foam polymer, and anchor rod reinforcement techniques were evaluated, followed by an analysis of the structural stability of the caissons post reinforcement during long-term operations. The findings demonstrate the minimal horizontal displacement of and stress variation in caissons under seasonal groundwater fluctuations, without significant structural alterations. Nevertheless, the presence of loose soil, voids, and caisson inclinations may decline the caisson's support force and bearing capacity. With the increase in non-compactness, void size, and inclination, the structural stability of caissons notably diminishes. Reinforcing loose soil with permeable polymers, filling voids with foam polymers, and utilizing anchor rods are all effective methods for strengthening caisson structures and enhancing their stability.
- Subjects
ZHENGZHOU Shi (China); CAISSONS; TRENCHLESS construction; STRUCTURAL stability; GROUNDWATER; STRUCTURED financial settlements
- Publication
Applied Sciences (2076-3417), 2024, Vol 14, Issue 12, p4971
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app14124971