Study on the Earth Pressure during Sinking Stage of Super Large Caisson Foundation
Source abstract
Abstract
End resistance is a dominant variable in the sinking process of super-sized caisson foundation, which is of great importance to the safe sinking of the caisson foundation. Based on soil excavation process of super large caisson foundation of the main tower of Changtai Yangtze River Bridge, the distribution characteristics and variation of earth pressure under the foot blade was analyzed using 3D finite element method at the first stage of soil excavation. Furthermore, the earth pressure was monitored in real time during soil excavation in order to analyze the influence of soil excavation process on the distribution of earth pressure. The analysis results of engineering practice showed that in the process of soil excavation from inner area to outer area, the end resistance of inner bulkhead and inner partition walls decreased, while the end resistance of outer bulkhead and outer partition walls gradually increased till the soil reached the failure state in the outer bulkhead area. The distribution characteristics and variation of the earth pressure can really reflect overall stress state of caisson foundation, which helps guide the safe sinking by soil excavation.
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Research context
OpenAlex topics: Civil and Geotechnical Engineering Research · Geotechnical Engineering and Underground Structures · Geotechnical Engineering and Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
University of Chinese Academy of Sciences, Beijing 100049, China
References (16)
Show source-provided references
1. Duan, L.C., and Yin, Q. (2006). Design and Construction of Caissons, Tongji University Press.
2. Study on the characteristics of friction resistance and the mechanism of sudden sinking in the middle and late sinking stages of super large caisson foundation
3. Study on penetration resistance distribution characteristic of sunk shaft foundation
4. Luo, C.Y. (2019). Settlement Monitoring and Numerical Simulation Analysis of Super-Deep and Large Caisson Foundation. [Ph.D. Thesis, Southwest Jiaotong University].
5. Huang, D. (2018). Study on Stress Characteristics and Surrounding Settlement of Large Caisson during Sinking Process. [Ph.D. Thesis, Tianjin University].
6. Li, P. (2017). Construction Technology for Deep-Water Huge Open Caisson Foundation. [Ph.D. Thesis, Southwest Jiaotong University].
7. Analysis of limiting soil resistance beneath cutting curb during sinking of open caisson
8. Analysis of ultimate bearing capacity of ring cutting curbs on open caisson foundation bevels
9. Experiments on spatial stress of foot blade during caisson sinking in water
10. Study of sinking resistance of large and deep caisson based on centrifugal model test
11. Research on stress and settlement of super-large open caisson during first lifts
12. Zhong, J.H. (2016). The In-Suit Test Study on Super-Sized Caisson Force during Sinking. [Ph.D. Thesis, Southwest Jiaotong University].
13. Analysis on sudden sinking behaviors of massive open caisson in deep-thick soft clay area
14. Analysis of large caisson sinking measured resistance
15. Research on structural systems for very long-span rail-cum-road cable-stayed bridge
16. Study of mechanism and early warning indexes of abrupt sinking of large open caisson in deep soft clay layers10.3917/const.054.0033 ↗