Affiliation:
1. Hunan Engineering Research Center of Structural Safety and Disaster Prevention for Urban Underground Infrastructure, Hunan City University, Yiyang 413000, China
2. School of Civil Engineering, Central South University, Changsha 410075, China
Abstract
The support system is the most important part of foundation pit engineering, which mainly determines the safety of foundation pit engineering. Based on the characteristics of the foundation pit of Changsha international financial center, the original pile-anchor-beam (PAB) support system is improved into a new form of support system, the pile-anchor-ribbed-beam (PARB) support system. This study establishes a numerical simulation model to calculate the surface settlement and the deformation of the retaining structure caused by the excavation of the foundation pit by using the PAB and PARB support systems, respectively. Finally, this study analyzes the influence of pile anchorage depth, ribbed beam size and waist beam size on the support effect. The field monitoring data are in good agreement with the numerical simulation results, which verifies the validity and accuracy of the numerical calculation model. The support effect of the new PARB support system is 30% higher than that of the original PAB support system. The position of maximum surface settlement is about 0.5 times the excavation depth from the retaining structure, and the position of maximum lateral deformation of the pile is about 0.9 times the excavation depth from the pile top. The increase in pile embedded depth and ribbed beam size can significantly improve the support effect, while the change of waist beam size does not improve the support effect significantly.
Funder
Hunan Provincial Education Department Foundation
Natural Science Foundation of Hunan province
Hunan Chemical Geological Engineering Survey Institute Co., Ltd.
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
Reference34 articles.
1. Zhao, X., Wang, H., Li, Z., Dai, G., Yin, Z., Cao, S., and Zhou, J. (2022). Numerical Study on the Deformation of Tunnels by Excavation of Foundation Pit Adjacent to the Subway. Appl. Sci., 12.
2. Dynamic back analysis of soil deformation during the construction of deep cantilever foundation pits;Zhang;Sci. Rep.,2022
3. Statistical prediction of deformations of soil nail walls;Yuan;Comput. Geotech.,2019
4. System reliability analysis of soil nail wall using random finite element method;Johari;Bull. Eng. Geol. Environ.,2020
5. The simultaneous use of piles and prestressed anchors in foundation design;Danziger;Eng. Geol.,2006
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献