Mechanical Properties and Influencing Factors of Shield Cutting Existing Station Supporting Piles

Xiaoming Guan, Zeliang Liu, Huawei Xu (), Yanchun Liu, Xianzhang Ling, Hao Ding, Sihao Ren, Ruiquan Lu, Ke Yu and Jijun Miao
Additional contact information
Xiaoming Guan: School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
Zeliang Liu: School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
Huawei Xu: School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
Yanchun Liu: School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
Xianzhang Ling: School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
Hao Ding: The Fourth Construction Co., Ltd. of China Construction Eighth Engineering Division, Qingdao 266000, China
Sihao Ren: The Fourth Construction Co., Ltd. of China Construction Eighth Engineering Division, Qingdao 266000, China
Ruiquan Lu: Qingdao Metro Group Co., Ltd., Qingdao 266071, China
Ke Yu: The Fourth Construction Co., Ltd. of China Construction Eighth Engineering Division, Qingdao 266000, China
Jijun Miao: School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China

Sustainability, 2023, vol. 15, issue 15, 1-22

Abstract: Based on the shield-cutting existing station supporting piles project of Zhengzhou metro line 6, the process and mechanism of concrete in the process of pile cutting were analyzed by establishing a three-dimensional model of concrete with a cutter. The magnitude and variation rules of cutting force, penetration force, and tangential force were explored. The variation rules of cutting force with four factors of cutting speed, cutting depth, cutter width, and tool rake angle were explored. The correctness of the numerical model and results were verified by the theoretical analysis method. Finally, the significance of the influencing factors of pile cutting was studied by means of range analysis and variance analysis using the orthogonal test method, and the cutter parameters were optimized. The cutting mechanism is that the front concrete is compressed and crushed to produce a dense core. The cutting force increases rapidly to its maximum value in a short time during the cutting process. The cutting force is always larger than the penetration force and tangential force. The cutter contact force basically remains unchanged with the change in cutting speed; however, it increases with the increase in cutting depth and cutter width. The significant order of the three influencing factors is cutting depth, cutter width, and rake angle. It is suggested that the cutting depth be adjusted preferentially, followed by the cutter width. And the principle of rake angle should be considered last.

Keywords: shield tunnel; pile cutting; numerical simulation; cutting concrete; cutting mechanism; mechanical properties; influencing factors (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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