赵建军, 解明礼, 余建乐, 柴贺军, 李涛, 赵伟华. 2019: 工程荷载诱发填方边坡变形破坏机制试验研究. 工程地质学报, 27(2): 426-436. DOI: 10.13544/j.cnki.jeg.2017-368
    引用本文: 赵建军, 解明礼, 余建乐, 柴贺军, 李涛, 赵伟华. 2019: 工程荷载诱发填方边坡变形破坏机制试验研究. 工程地质学报, 27(2): 426-436. DOI: 10.13544/j.cnki.jeg.2017-368
    ZHAO Jianjun, XIE Mingli, YU Jianle, CHAI Hejun, LI Tao, ZHAO Weihua. 2019: EXPERIMENTAL STUDY ON DEFORMATION AND FAILURE MECHANISM OF FILL EMBANKMENT SLOPE DUE TO ENGINEERING LOAD. JOURNAL OF ENGINEERING GEOLOGY, 27(2): 426-436. DOI: 10.13544/j.cnki.jeg.2017-368
    Citation: ZHAO Jianjun, XIE Mingli, YU Jianle, CHAI Hejun, LI Tao, ZHAO Weihua. 2019: EXPERIMENTAL STUDY ON DEFORMATION AND FAILURE MECHANISM OF FILL EMBANKMENT SLOPE DUE TO ENGINEERING LOAD. JOURNAL OF ENGINEERING GEOLOGY, 27(2): 426-436. DOI: 10.13544/j.cnki.jeg.2017-368

    工程荷载诱发填方边坡变形破坏机制试验研究

    EXPERIMENTAL STUDY ON DEFORMATION AND FAILURE MECHANISM OF FILL EMBANKMENT SLOPE DUE TO ENGINEERING LOAD

    • 摘要: 填方路堤在堆填碾压夯实后自然状态下具有较好的稳定性,但在先期施工与后期公路运营期间,受工程荷载、动荷载等多因素作用将会出现大量变形破坏现象。针对这一问题,本文以某填方路堤边坡为例,运用室内物理模拟技术探讨研究工程荷载诱发填方边坡变形破坏机制。研究结果表明:填方体在上部不断施加堆载后,坡体内部应力条件改变,产生不均匀沉降现象。填方体边坡变形破坏主要受控于填方体在加载过程中坡顶堆载处拉应力的集中与坡体内剪应力的集中程度,潜在滑动面沿张拉裂缝延伸方向扩展,同时在堆载体下部逐步过渡为压剪塑形带,两者逐步贯通并向下部扩展延伸,最终产生边坡整体变形破坏。其变形演化机制为:堆载作用下坡体内部应力重分布→堆载区边缘张拉裂缝形成并扩展、堆载体下部产生压剪塑形带→张拉裂缝、压剪塑形带贯通形成滑动面→推力作用下整体滑动,此变形为典型的蠕滑-拉裂式滑坡。此研究可以为相似工程提供借鉴。

       

      Abstract: The fill embankment has good stability under natural conditions after compaction. However, during the early construction and later road operation, a large number of deformation and damage phenomena could occur due to multiple factors such as engineering load and dynamic load. Aiming at this problem, this paper takes a fill embankment slope as an example, and uses indoor physical simulation technology to study the deformation and failure mechanism of the slope induced by the engineering load. The results show that after the pile is continuously applied in the upper part, the internal stress conditions of the slope change, resulting in uneven settlement. The deformation and failure of the fill slope is mainly controlled by the concentration of the tensile stress at the top of the slope during the loading process and the concentration of the shear stress in the slope. The direction of the crack extends and gradually changes to the pressure in the lower part of the pile carrier. The shear-shaped belt is gradually penetrated and extended to the lower portion to cause overall deformation and destruction of the slope. The deformation mechanism has the following process:from internal stress redistribution to tension crack formation and expansion then to tensile cracks to form a sliding surface, finally overall sliding. The deformation is a typical creep-pull cracked landslide. This study can provide reference for similar projects.

       

    /

    返回文章
    返回