抗滑桩前预留岩体破坏模式及稳定性分析

doi:10.16265/j.cnki.issn1003-3033.2022.05.0935

中国安全科学学报 ›› 2022, Vol. 32 ›› Issue (5): 84-89.doi: 10.16265/j.cnki.issn1003-3033.2022.05.0935

抗滑桩前预留岩体破坏模式及稳定性分析

朱大鹏¹^,²(), 何磊¹, 田力¹, 秦粮凯³

¹ 西南石油大学地球科学与技术学院,四川成都 610500
² 三峡库区地质灾害教育部重点实验室(三峡大学),湖北宜昌 443002
³ 同济大学土木工程学院,上海 200092

收稿日期:2021-11-06 修回日期:2022-03-10 出版日期:2022-05-28
作者简介:
朱大鹏 (1981—),男,湖北天门人,博士,副教授,主要从事地质灾害防治理论方面的教学与研究工作。E-mail: zdpcug@126.com。
基金资助:
国家自然科学基金资助(41302256); 三峡库区地质灾害教育部重点实验室开放基金资助(2020KDZ06)

Study on failure mode and stability of reserved rock in front of anti-slide piles

ZHU Dapeng¹^,²(), HE Lei¹, TIAN Li¹, QIN Liangkai³

¹ School of Geoscience and Technology, Southwest Petroleum University, Chengdu Sichuan 610500, China
² Key Laboratory of Geological Hazards on Three Gorges Reservoir Area (China Three Gorges University), Ministry of Education, Yichang Hubei 443002, China
³ College of Civil Engineering, Tongji University, Shanghai 200092, China

Received:2021-11-06 Revised:2022-03-10 Published:2022-05-28

摘要/Abstract

摘要：

为了探究大开挖条件下桩前预留岩体的稳定性,首先基于相似理论开展不同宽度预留岩体的变形及破坏模式试验研究;然后基于极限平衡理论得到不同破坏模式下预留岩体稳定性计算公式;最后以湖南省某滑坡治理桩前大开挖为例,分析不同破坏模式下预留岩体的稳定性变化特征。结果表明:随着桩前预留岩体宽度的增加,其变形总体呈临空面外凸—少量裂缝—桩前岩体顶面隆起的发展趋势; 宽度较大的预留岩体易发生上滑移破坏,宽度较小的预留岩体则易发生下滑移破坏;下滑移破坏中,稳定系数随着预留岩体宽度的增大按开口向上的二次函数形式增加。

关键词: 抗滑桩, 预留岩体, 破坏模式, 稳定性, 滑移破坏, 滑坡治理

Abstract:

In order to study stability of rock mass reserved in front of anti-slide piles under large excavation condition, deformation and failure modes of reserved rock mass at different widths were tested and analyzed based on similarity theory. Secondly, formulas for stability calculation of rock mass under different failure modes were deduced according to limit equilibrium theory. Finally, with landslide in Hunan province as research object, stability variance features of the mass under each failure mode was analyzed. The results show that along with increase of width, deformation trend of reserved rock is always in the form of deformation of the excavation surface - a few cracks - local uplift deformation in front of piles. The rock mass with larger width is prone to up-slide failure, while that with smaller width is prone to down-slide one. As width increases, stability coefficient increases in form of a quadratic function with the opening upward under down-slide failure.

Key words: anti-slide pile, reserved rock, failure mode, stability, sliding failure, landslide treatment

朱大鹏, 何磊, 田力, 秦粮凯. 抗滑桩前预留岩体破坏模式及稳定性分析[J]. 中国安全科学学报, 2022, 32(5): 84-89.

ZHU Dapeng, HE Lei, TIAN Li, QIN Liangkai. Study on failure mode and stability of reserved rock in front of anti-slide piles[J]. China Safety Science Journal, 2022, 32(5): 84-89.

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抗滑桩前预留岩体破坏模式及稳定性分析

Study on failure mode and stability of reserved rock in front of anti-slide piles

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