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工程开挖引起的黄土边坡变形破坏机理分析

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文章导航 > 西北地质 > 2015 > 48(4): 210-217

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王衍汇, 倪万魁, 李征征, 石博溢, 戴磊, 袁志辉. 工程开挖引起的黄土边坡变形破坏机理分析[J]. 西北地质, 2015, 48(4): 210-217.
引用本文: 王衍汇, 倪万魁, 李征征, 石博溢, 戴磊, 袁志辉. 工程开挖引起的黄土边坡变形破坏机理分析[J]. 西北地质, 2015, 48(4): 210-217.
shu
WANG Yanhui, NI Wankui, LI Zhengzheng, SHI Boyi, DAI Lei, YUAN Zhihui. Study on the Deformation and Failure Mechanism of Loess Slope Caused by Engineering Excavation[J]. Northwestern Geology, 2015, 48(4): 210-217.
Citation: WANG Yanhui, NI Wankui, LI Zhengzheng, SHI Boyi, DAI Lei, YUAN Zhihui. Study on the Deformation and Failure Mechanism of Loess Slope Caused by Engineering Excavation[J]. Northwestern Geology, 2015, 48(4): 210-217.
shu

工程开挖引起的黄土边坡变形破坏机理分析

  • 长安大学地质工程与测绘学院, 陕西西安 710054

  • 基金项目: 陕西省科技统筹创新工程计划项目(2012KTDZD03-03)

Study on the Deformation and Failure Mechanism of Loess Slope Caused by Engineering Excavation

  • College of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, Shaanxi, China

    摘要
  • 近年来,由于黄土高原地区经济快速发展,受地形限制的影响,很多工程建设无法避开已有的黄土滑坡,使得在边坡开挖过程中产生各种变形破坏迹象,危害十分严重。笔者以富县洛阳乡某挖方边坡为例。根据其地质环境、滑坡概况以及人类活动等情况,利用工程地质分析法定性阐述了在边坡开挖过程中的破坏机理,并将整个变形破坏过程分为3个阶段:坡脚卸载差异变形阶段、压致拉裂面贯通阶段、"V"型裂缝稳定阶段;其次,结合有限元数值模拟量化描述了边坡的变形破坏特征;最后,基于边坡应力分布情况,推算出蠕滑段发育的最大深度距剪出口约93m,同实际情况较为吻合。
    Recently, with the rapid economic development in the loess plateau, many engineering construction have to excavate in loess slope or landslide for side construction under the influence of the terrain, which has caused all kinds of deformation and failure in the process of slope excavation, and then bring serious harm. In this paper, we take a cut slope in Luoyang village, Fuxian as an example. Firstly, the slope failure mechanism in the process of slope excavation has been discussed by using qualitative analysis of engineering geology, and the deformation and failure process has been divided into three stages:the stage of differential deformation due to the toe of slope unloading, the stage of pressure cracking surface transfixion, and the stage of "V" type fracture stability. Secondly,the slope deformation and destruction characteristics have been described through combining with the finite element numerical simulation quantitatively. Finally, the maximum depth of creep portion has been calculated, which is about 93m from the shear opening and is consistent with the actual situation.
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出版历程
收稿日期:  2015-06-29
修回日期:  2015-07-17
刊出日期:  2015-12-15

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