循环载荷作用下边坡临空面质点运动轨迹特征探讨

周剑; 张路青; 宗世强

循环载荷作用下边坡临空面质点运动轨迹特征探讨

1.
中国科学院工程地质力学重点实验室中国科学院地质与地球物理研究所北京 100029;
2.
中国科学院研究生院北京 100049;
3.
泰山风景名胜区管理委员会泰安 271000

基金项目:

中国科学院知识创新工程重要方向项目(KZCX2-YW-Q03),十一五国家科技支撑计划项目(2008BAK50B04)

详细信息

作者简介:
周剑,从事地质工程、岩石力学研究.Email: zhjian043@163.com

中图分类号: TU457
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出版历程
- 收稿日期: 2010-08-20
- 修回日期: 2011-05-05
- 刊出日期: 2011-10-25

NUMERICAL STUDY OF PARTICLE MOTION AT FREE SURFACE OF SLOPES UNDER CYCLIC LOADING

1.
Key Laboratory of Engineering Geomechanics,Institute of Geology and Geophysics,CAS,Beijing 100029;
2.
Graduate University of Chinese Academy of Sciences,Beijing 100049;
3.
Administrative Committee of Mount Tai Scenic Spot, Tai'an 271000

摘要

摘要: 循环荷载作用下边坡岩土体容易产生变形破坏,边坡各部位的破坏方式存在不同。基于数值模拟技术,建立2个不同高度的边坡模型,分析了坡肩处质点分别在10Hz垂向压缩和水平剪切循环荷载作用下的运动轨迹特征,并依据物体受力运动与变形之间的关系确定了坡肩潜在的破坏方式。研究表明: 2种加载方式下坡肩质点的运动轨迹均呈椭圆形,加载方式和坡高对坡肩质点的运动轨迹及边坡的潜在破坏方式都有一定影响。低边坡坡肩质点在垂向压缩循环荷载下主要表现为垂向振动,该处岩体发生拉破坏的可能性大; 在水平剪切循环作用下该质点主要表现为水平向振动,坡肩岩体发生剪破坏的可能性大。对高边坡而言,坡肩质点水平向与垂直向的振动幅值之差较低边坡坡肩质点的明显小,说明高边坡坡肩在这2种循环荷载最有可能产生拉剪破坏。
- 循环荷载 /
- 临空面质点 /
- 运动轨迹 /
- 坡肩破坏方式
Abstract: Under cyclic loading,a slope can be easily deformed and damaged.The failure mode of each part of the slope is different.Based on the technology of numerical simulation,two slopes with different heights are established.And the particle motion at slope shoulders of the two slopes are analyzed under 10 Hz cyclic vertical compressive load and horizontal shear load,respectively.According to the relation between force and deformation,the potential failure mode of slope shoulder is reveal.The results show that: under cyclic vertical compressive loading and horizontal shear loading,the trail of slope shoulder' particle motion is oval shape.However,the loading pattern and slope height affect the trail of the particle motion.Under vertical compressive load,the particle at lower slope shoulder is experiencing vertical vibration seriously.So the lower slope shoulder is more easily to surfer tension cut-off.Reversely,the particle at lower slope shoulder is experiencing horizontal vibration significantly under horizontal shear load,which show the lower slope shoulder is more easily subject to shear failure.Comparing with the lower slope condition,the vertical and horizontal amplitude of vibration of the particle at the higher slope shoulder under both vertical and horizontal load are close to each other,which show the shoulder of higher slope will be tensile-shear complex failure.
- Cyclic load /
- Particle of free surface /
- Motion trail /
- Failure mode of slope shoulder

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参考文献(1)

[1] 朱传云, 卢文波,董振华.岩质边坡爆破振动安全判据综述[J].爆破, 1997, 14 (4): 13~17. Zhu Chuanyun, Lu Wenbo, Dong Zhenhua. Review of safety criterion of rock slope blasting vibration. Blasting, 1997, 14 (4):13~17.

[2] 杨庆华, 姚令侃,任自铭.地震作用下松散体斜坡崩塌动力学特性离心模型试验研究[J].岩石力学与工程学报, 2008, 27 (2): 368~373. Yang Qinghua,Yao Lingkan,Ren Ziming.Gentrifugal model test on dynamical characteristic of landslips of loose slope under seismic loading.Chinese Journal of Rock Mechanics and Engineering, 2008, 27 (2): 368~373.

[3] 梁庆国, 韩文峰,马润勇,谌文武.强地震动作用下层状岩体破坏的物理模拟研究[J]岩土力学, 2005, 26 (8): 1307~1311. Liang Qingguo,Han Wenfeng,Ma Runyong,Chen Wenwu.Physiscal simulation study on dynamic failures of layered rock mass under strong ground motion.Rock and Soil Mechanics, 2005, 26 (8): 1307~1311.

[4] 王勇智, 戚炜,门玉明,彭建兵.强震区岩体动力破坏机制研究[J].岩土力学, 2005, 26 (11): 1841~1844. Wang Yongzhi,Qi Wei,Men Yuming,Peng Jianbing.Experimental research of dynamic failure mechanism of rockmass in meizoseismal area.Rock and Soil Mechanics, 2005, 26 (11): 1841~1844.

[5] 张振南, 葛修润.地震载荷作用下的节理岩体破裂模型.岩石力学与工程学报, 2005, 24 (10): 1645~1648. Zhang Zhennan,Ge Xiurun.Fracture model of jointed rock mass subjected to seismic loading.Chinese Journal of Rock Mechanic and Engineering, 2005, 24 (10): 1645~1648.

[6] 刘亚群, 李海波,李俊如,等.爆破荷载作用下黄麦岭磷矿岩质边坡动态响应的UDEC模拟研究[J].岩石力学与工程学报, 2004, 23 (21): 3659~3663. Liu Yaquan,Li Haibo,Li Junru,et al.Udec simulation on dynamic responses of rock slope of Huangmailing phosphorite mine under explosion.Chinese Journal of Rock Mechanics and Engineering, 2004, 23 (21): 3659~3663.

[7] 周家文, 徐卫亚,石崇.基于3DEC的节理岩体边坡地震影响下的楔体稳定性分析[J].岩石力学与工程学报, 2007, 26(增1): 3402~3409. Zhou Jiawen,Xu Weiya,Shi Chong.Wedge stability analysis of jointed rockmass slope considering seismic influences based on 3DEC.Chinese Journal of Rock Mechanics and Engineering, 2007, 26(app1): 3402~3409.

[8] 崔芳鹏, 胡瑞林,殷跃平,等.纵横波时差耦合作用的斜坡崩滑效应离散元分析——以北川唐家山滑坡为例[J].岩石力学与工程学报, 2010, 29 (2): 319~327. Cui Fangpeng,Hu Ruilin,Yin Yueping,et al.Distinct element analysis of collapsing sliding response of slope triggered by time difference coupling effects of P and S seismic waves——taking Tangjiashan landslide in Beichuan county for example.Chinese Journal of Rock Mechanics and Engineering, 2010, 29 (2): 319~327.

[9] 黄润秋. 汶川8.0级地震触发崩滑灾害机制及其地质力学模式[J].岩石力学与工程学报, 2009, 28 (6): 1239~1249. Huang Runqiu.Mechanism and geomechanical modes of landslide hazard triggered by Wenchuan 8.0 earthquake.Chinese Journal of Rock Mechanics and Engineering, 2009, 28 (6): 1239~1249.

[10] 郑颖人, 叶海林,黄润秋.地震边坡破坏机制及其破裂面的分析探讨[J].岩石力学与工程学报, 2009, 28 (8): 1714~1723. Zheng Yingren,Ye Hailin,Huang Runqiu.Analysis and discussion of failure mechanics and fracture surface of slope under earthquake.Chinese Journal of Rock Mechanics and Engineering, 2009, 28 (8): 1714~1723.

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