Author
Listed:
- Xuhe Gao
(Key Laboratory of Highway Engineering in Special Region, Ministry of Education, Chang’an University, Xi’an 710064, China)
- Wei-ping Tian
(Key Laboratory of Highway Engineering in Special Region, Ministry of Education, Chang’an University, Xi’an 710064, China)
- Zhipei Zhang
(College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China)
Abstract
The surrounding ground settlement and displacement control of an underground diaphragm wall during the excavation of a foundation pit are the main challenges for engineering safety. These factors are also an obstacle to the controllable and sustainable development of foundation-pit projects. In this study, monitoring data were analyzed to identify the deformation law and other characteristics of the support structure. A three-dimensional numerical simulation of the foundation-pit excavation process was performed in Midas/GTS NX. To overcome the theoretical shortcomings of parameter selection for finite-element simulation, a key data self-verification method was used. Results showed that the settlement of the surface surrounding the circular underground continuous wall was mainly affected by the depth of the foundation-pit excavation. In addition, wall deformation for each working condition showed linearity with clear staged characteristics. In particular, the deformation curve had obvious inflection points, most of which were located deeper than 2/3 of the overall excavation depth. The characteristics of the cantilever pile were not obvious in Working Conditions 3–9, but the distribution of the wall body offset in a D-shaped curve was evident. Deviation between the monitoring value of the maximal wall offset and the simulated value was only 4.31 %. The appropriate physical and mechanical parameters for key data self-verification were proposed. The concept of the circular-wall offset inflection point is proposed to determine the distribution of inflection-point positions and offset curves. The method provides new opportunities for the safety control and sustainable research of foundation-pit excavations.
Suggested Citation
Xuhe Gao & Wei-ping Tian & Zhipei Zhang, 2020.
"Analysis of Deformation Characteristics of Foundation-Pit Excavation and Circular Wall,"
Sustainability, MDPI, vol. 12(8), pages 1-17, April.
Handle:
RePEc:gam:jsusta:v:12:y:2020:i:8:p:3164-:d:345455
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Citations
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Cited by:
- Sunkuk Kim, 2021.
"Technology and Management for Sustainable Buildings and Infrastructures,"
Sustainability, MDPI, vol. 13(16), pages 1-3, August.
- Kaifeng Wang & Mengjie Liu & Jie Cao & Jiayong Niu & Yunxia Zhuang, 2023.
"Bearing Characteristics of Composite Foundation Reinforced by Geosynthetic-Encased Stone Column: Field Tests and Numerical Analyses,"
Sustainability, MDPI, vol. 15(7), pages 1-25, March.
- You Wang & Shaohua Liang & Changxi Huang & Rui Wang, 2022.
"Foundation Settlement Response of Existing High-Speed Railway Bridge Induced by Construction of Undercrossing Roads,"
Sustainability, MDPI, vol. 14(14), pages 1-19, July.
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