Study on the Interaction Mechanism between Micropiles and Soil Landslides

Rui Xu (), Guochen Sui, Guanglu Wang, Hui Cheng, Xunchang Li, Wei Yang, Juntao Deng and Farong Zeng
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Rui Xu: School of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, China
Guochen Sui: School of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, China
Guanglu Wang: School of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, China
Hui Cheng: PowerChina Northwest Engineering Corporation Limited, Xi’an 710065, China
Xunchang Li: School of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, China
Wei Yang: School of Geology Engineering and Geomatics, Chang’an University, Xi’an 710054, China
Juntao Deng: China Jikan Research Institute of Engineering Investigations and Design, Co., Ltd., Xi’an 710043, China
Farong Zeng: China National Petroleum Corporation Changqing Oilfield Branch, Xi’an 710018, China

Sustainability, 2023, vol. 15, issue 13, 1-24

Abstract: The interaction mechanism between micropiles and soil landslides is comprehensively investigated through static model tests and numerical simulations. The results show that the deformation damage mode of micropiles is mainly bending and shear damage. Because of bending deformation, cracks appear at the rear and front of the pile, respectively, about three times the pile diameter from the sliding surface. In addition, the plastic damage becomes more severe when approaching the back edge of the landslide body. Micropiles in the landslide body play a significant role in load sharing; more importantly, there is a certain pattern between the miniature piles. According to the experimental and numerical simulation results, the recommended load-sharing ratio for micropile design under static conditions is as follows: rear-row pile:middle-row pile:front-row pile = 0.411:0.348:0.241. The research in this paper reveals the good effect of micropiles against landslides, explains the mechanism of pile–soil interaction, and provides a theoretical reference for the research and application of micropiles in engineering.

Keywords: micropiles; soil landslide; static model test; interaction mechanism; numerical simulation (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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