ARTICLE
Influence of grouting pressure volatility on additional response of adjacent pile foundation in shield construction
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Jun Zhang 1,2
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1
Shanxi Transportation Technology Research and Development Co., Ltd., Taiyuan, Shanxi Province, China
2
Key Laboratory of Highway Construction and Maintenance Technique in Loess Area, Taiyuan, Shanxi Province, China
3
Central Southern China Electric Power Design Institute Co. LTD of China Power Engineering Consulting Group, Wuhan, China
4
China Railway Siyuan Group Southwest Survey and Design Co. Ltd, Kunming, China
CORRESPONDING AUTHOR
Chuan-Chuan Zhang   

Shanxi Transportation Technology Research & Development Co., Ltd, Taiyuan, Taiyuan, China
Submission date: 2021-06-09
Final revision date: 2021-09-24
Acceptance date: 2021-09-25
Online publication date: 2022-01-20
Publication date: 2021-11-30
 
Journal of Theoretical and Applied Mechanics 2022;60(1):33–47
 
KEYWORDS
TOPICS
ABSTRACT
Soil parameters along the heading direction are subjected to spatial variability during shield construction, so grouting pressure requires constant adjustment to ensure ground stress sta- bility. This causes grouting pressure to fluctuate around the design pressure/curve. There- fore, the influence of the grouting pressure volatility on the adjacent loaded-pile foundation should be considered in shield tunneling. In this study, a refined numerical simulation of the shield construction process is conducted using the Fast Lagrangian Analysis of Continua in Three Dimensions (FLAC3D) software. A total of 300 groups of grouting pressure pa- rameters with a skewed normal distribution are input into the numerical model. Then, the influence of the construction parameter uncertainty on the adjacent loaded-pile foundation is analyzed. Finally, the back analysis method is conducted based on the monitored data to evaluate how the construction process affects the pile foundation. The calculation results are compared with those of the traditional finite element method. The results indicate that in the tunneling process, the grouting pressure fluctuation greatly affects the additional bend- ing moment of the adjacent pile foundation. Under the influence of the grouting pressure, the additional axial force and additional bending moment of the pile foundation also follow the skewed normal distribution. The back analysis results of the pile foundation are greater than those of the typical numerical method by about 60% 100%, that is using the back analysis calculation results to evaluate the pile foundation additional response can reduce the risk.
 
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