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| Study on the mechanical performance of zigzag anti-slide pile on steep inclined slip surface landslide |
| Received:December 13, 2021 Revised:January 31, 2023 |
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| DOI：10.7511/jslx20221213001 |
| KeyWord:zigzag anti-slide pile steep sliding surface mechanical model performance analysis |
| Author | Institution |
| 侯小强 |
兰州交通大学 土木工程学院, 兰州 |
| 刘杰瑞 |
兰州交通大学 土木工程学院, 兰州 |
| 王新飞 |
兰州交通大学 土木工程学院, 兰州 |
| 周重任 |
兰州交通大学 土木工程学院, 兰州 |
| 万宝峰 |
甘肃工程地质研究院, 兰州 |
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| Abstract: |
| The vertical component of thrust of landslide on a steep inclined sliding surface is significant.Aiming at insufficient interaction between the thrust level of a landslide and an ordinary anti-slide pile,a zigzag anti-slide pile structure is established.Based on the assumption of trapezoidal distribution of landslide thrust,the internal force calculation formula of loaded section is derived,the internal force calculation formula of anchoring section is derived by Winkler elastic foundation theory,and the mechanical properties of the zigzag anti-slide pile are studied.The analysis shows that; (1) with the increase of the inclination of the sliding surface,the bending moment,shear force and lateral stress of the loading section and anchorage section of the zigzag anti-sliding pile decrease,and the reduction range of the internal force increases; (2) when the inclination angle of the sliding surface is between 20 and 40 degrees,with the increase of the inclination angle of the sliding surface,the theoretical minimum length of the anchoring section gradually increases,at 40 degrees,the length of the anchoring section reaches the maximum value of 4.2m,which only accounts for 35% of the total length of the pile and is much smaller than the maximum length of the anchoring section (1/2 of the total pile length) obtained according to current specifications,and the friction resistance of the pile side can fully meet the vertical mechanical balance; (3) by comparing the internal forces of the zigzag anti-slide pile with an ordinary anti-slide pile,the bending moment of the loading section and anchoring section is reduced by 34%,the shear force by 36% and the pile side stress by more than 30%. |
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