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天水锻压机床厂滑坡变形破坏机制及形成演化

田尤 杨为民 刘廷 李浩 程小杰

田尤, 杨为民, 刘廷, 等, 2015. 天水锻压机床厂滑坡变形破坏机制及形成演化. 地质力学学报, 21 (2): 298-308.
引用本文: 田尤, 杨为民, 刘廷, 等, 2015. 天水锻压机床厂滑坡变形破坏机制及形成演化. 地质力学学报, 21 (2): 298-308.
TTIAN You, YANG Wei-min, LIU Ting, et al., 2015. DEFORMATION MECHANISM AND EVOLUTIONARY PROCESS OF THE TIANSHUI FORGING MACHINE PLANT LANDSLIDE IN GANSU. Journal of Geomechanics, 21 (2): 298-308.
Citation: TTIAN You, YANG Wei-min, LIU Ting, et al., 2015. DEFORMATION MECHANISM AND EVOLUTIONARY PROCESS OF THE TIANSHUI FORGING MACHINE PLANT LANDSLIDE IN GANSU. Journal of Geomechanics, 21 (2): 298-308.

天水锻压机床厂滑坡变形破坏机制及形成演化

基金项目: 

中国地质调查局地质调查项目"西秦岭北缘断裂带天水段地震地质灾害调查评价"项目 12120114035601

详细信息
    作者简介:

    田尤(1991-), 男, 硕士研究生, 从事地质灾害、工程地质及矿物学等方面的研究。E-mail:asem_ty@163.com

  • 中图分类号: P642.22

DEFORMATION MECHANISM AND EVOLUTIONARY PROCESS OF THE TIANSHUI FORGING MACHINE PLANT LANDSLIDE IN GANSU

  • 摘要: 天水锻压机床厂滑坡(1.4×106 m3)发生于1990年8月11日, 滑坡体主要由次生黄土组成, 滑床为第四系黄土和新近系泥岩, 滑坡沿黄土-泥岩接触面发生, 属黄土接触面滑坡。通过野外调查和工程钻探对锻压机床厂滑坡变形破坏机制及形成演化进行研究, 结果表明, 该滑坡变形破坏方式表现为滑移-拉裂式, 受区内二元斜坡结构控制, 是在工程切坡和降雨、灌溉等诱发因素作用下形成; 其形成演化经历了高陡边坡形成期→滑坡孕育期→滑动面贯通临界期→滑坡启动下滑堆积期→滑坡复活变形期等过程。该滑坡目前处于欠稳定状态, 遇地震或强降雨等作用, 极有可能再次复活下滑。研究成果可为该类滑坡的防治预警提供理论依据。

     

  • 图  1  天水锻压机床厂滑坡综合平面图

    Figure  1.  Planar graph of Tianshui Forging Machine Plant

    图  2  天水锻压机床厂滑坡剖面图

    Figure  2.  Profile graph of Tianshui Forging Machine Plant

    图  3  天水锻压机床厂滑坡ZK2、ZK4钻孔柱状图

    Figure  3.  Columnar sections of the drill holes of ZK2 and ZK4 in Tianshui Forging Machine Plant

    图  4  天水锻压机床厂滑坡全貌及变形破坏特征

    Figure  4.  View and the characteristics of deformation damage of Tianshui Forging Machine Plant

    图  5  天水锻压机床厂滑坡形成机理

    Figure  5.  Formation mechanism of Tianshui Forging Machine Plant

    图  6  天水锻压机床厂边坡开挖受力示意图

    Figure  6.  Free-body diagram of slope excavation of Tianshui Forging Machine Plant

    图  7  天水锻压机床厂滑坡形成演化过程

    Figure  7.  Formation process of Tianshui Forging Machine Plant

    表  1  天水地区易滑地层物理力学性质统计表[1]

    Table  1.   Statistics of physical and mechanical properties of easy sliding layers in Tianshui area

    岩性时代物理性质抗剪强度
    含水量/%天然容重/(kN·m-3)干容重/(kN·m-3)峰值残余
    C/kPaφ/(°)Cr/kPaφr/(°)
    干黄土Q310.0~18.214.3~15.412.8~13.924.5~52.025.3~31.75.0~12.322.0~27.5
    湿黄土Q321.4~28.015.8~17.213.5~15.45.0~12.56.7~17.4<57.0~15.5
    弱风化泥岩N23.2~13.519.6~25.718.4~25.290.0~1570.018.0~44.220.0~293.015.4~33.6
    强风化泥岩N220.0~30.219.4~20.814.9~17.29.0~35.07.4~11.97.0~28.04.5~7.0
    注:C—黏聚力;φ—内摩擦角;Cr—残余黏聚力;φr—残余内摩擦角
    下载: 导出CSV

    表  2  天水锻压机床厂滑坡区岩土的抗剪强度指标[23]

    Table  2.   Shear strength of rock and soil in Tianshui Forging Machine Plant

    岩性时代原状土重塑土饱和重塑土
    C/kPaφ/(°)Cr/kPaφr/(°)Cr/kPaφr/(°)
    离石黄土Q28517.05013.5154.0
    泥岩N4513.5204.5132.5
    下载: 导出CSV
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  • 收稿日期:  2014-11-03
  • 刊出日期:  2015-06-28

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