近水平岩层阶状斜坡地震动响应特征分析

毕杨杨 王运生 苏毅 王国康 周粤 向超

毕杨杨, 王运生, 苏毅, 等. 2022. 近水平岩层阶状斜坡地震动响应特征分析[J]. 工程地质学报, 30(2): 533-541. doi: 10.13544/j.cnki.jeg.2020-550
引用本文: 毕杨杨, 王运生, 苏毅, 等. 2022. 近水平岩层阶状斜坡地震动响应特征分析[J]. 工程地质学报, 30(2): 533-541. doi: 10.13544/j.cnki.jeg.2020-550
Bi Yangyang, Wang Yunsheng, Su Yi, et al. 2022. Analysis of seismic response to gentle stepped rock slope[J]. Journal of Engineering Geology, 30(2): 533-541. doi: 10.13544/j.cnki.jeg.2020-550
Citation: Bi Yangyang, Wang Yunsheng, Su Yi, et al. 2022. Analysis of seismic response to gentle stepped rock slope[J]. Journal of Engineering Geology, 30(2): 533-541. doi: 10.13544/j.cnki.jeg.2020-550

近水平岩层阶状斜坡地震动响应特征分析

doi: 10.13544/j.cnki.jeg.2020-550
基金项目: 

国家重点研发计划项目 2017YFC1501000

国家自然科学基金 41877235

国家创新研究群体科学基金 41521002

地质灾害防治与地质环境保护国家重点实验室自主课题基金 SKLGP2015Z001

详细信息
    作者简介:

    毕杨杨(1995-),男,硕士生,主要从事工程地质和地质灾害研究工作. E-mail: 1648760977@qq.com

    通讯作者:

    王运生(1960-),男,博士,教授,博士生导师,主要从事工程地质力学方面的科研与教学工作. E-mail: wangys60@163.com

  • 中图分类号: P642.27

ANALYSIS OF SEISMIC RESPONSE TO GENTLE STEPPED ROCK SLOPE

Funds: 

the National Key Research and Development Program of China 2017YFC1501000

National Natural Science Foundation of China 41877235

the Funds for Creative Research Groups of China 41521002

the Independent Fund of State Key Laboratory of Geohazard Prevention, Geoenvironment Protection SKLGP2015Z001

  • 摘要: 川南中低山地区近水平岩层侵蚀台地阶状斜坡普遍发育且主要为居住区,研究这类阶状斜坡的地震动响应对揭示珙县地区震后崩塌山体灾害发育的动力机理有一定意义。宜宾地震后余震频发,安置在珙县五同村斜坡不同位置的强震监测仪于2020年9月6日成功监测到MS3.1级余震,通过各监测点之间实测地震动数据相应的比较发现:与位于一级台阶处的参考监测点相比,二级台阶上的监测点在地震荷载作用下的地震动峰值加速度(PGA)和Arias强度放大系数、岩性共振周期比值均大于1.00,说明特殊斜坡具有较为显著的地震动高程放大效应和岩性选频放大效应;由于陡崖附近节理、裂隙较为发育,二级台阶中后部监测点地震动PGA、Arias强度比同台阶近陡崖监测点缩小了1.73、2.20倍,表明阶状斜坡存在近陡崖效应;二级台阶中后部(凸起地形)地震动持时是一级台阶参考监测点(凹陷地形)地震动持时的1.25倍,阶状斜坡存在微地形地震动持时放大效应。
  • 图  1  五同村地震监测点布置剖面地质图(a)及斜坡地质构造示意图(b)

    Figure  1.  The geological profiles of Wutong seismic station(a) and slope structure(b)

    图  2  地震监测点所在区域地层及断层分布图

    Figure  2.  The distribution of regional stratum and fault around seismic station

    表  1  长宁地震典型余震基本信息

    Table  1.   The basic information of the aftershocks

    日期 时间 纬度/(°) 经度/(°) 深度/km 震中距/km 震级
    2020-08-05 09:04:06 28.18 105.06 8.0 23.0 3.1
    2020-08-06 17:08:13 28.41 104.85 10.0 20.0 3.9
    2020-08-11 13:41:48 28.16 105.06 9.0 24.0 3.8
    2020-08-14 00:30:31 28.16 105.07 9.0 24.6 3.1
    2020-08-17 12:43:33 28.17 104.74 8.0 11.1 3.0
    2020-08-21 17:27:03 28.15 104.82 8.0 8.9 3.0
    2020-08-22 13:36:36 28.19 104.83 8.0 4.5 3.2
    下载: 导出CSV

    表  2  监测点所在位置场地属性

    Table  2.   Properties of each monitoring site

    监测点编号 绝对高程/m 监测点所在部位 场地类型 岩层产状 场地坐标
    1# 675 一级台阶 砂岩 160°∠4° 28°13′29.80″N,104°49′30.32″E
    2# 899 二级台阶陡崖附近 灰岩 190°∠6° 28°13′23.46″N,104°49′41.19″E
    3# 910 二级台阶中后部 灰岩 120°∠6° 28°13′19.70″N,104°49′53.09″E
    下载: 导出CSV

    表  3  监测点地震动加速度时程曲线

    Table  3.   Monitoring graph of the earthquake of each monitoring site

    EW SN UD
    1#监测点(砂岩,海拔675 m)
    2#监测点(灰岩,海拔899 m)
    3#监测点(灰岩,海拔910m)
    下载: 导出CSV

    表  4  监测点地震动时程傅里叶振幅谱

    Table  4.   Fourier spectrum of the earthquake of each monitoring site

    EW SN UD
    1#监测点(砂岩,海拔675 m)
    2#监测点(灰岩,海拔899 m)
    3#监测点(灰岩,海拔910 m)
    下载: 导出CSV

    表  5  监测点地震动加速度反应谱

    Table  5.   Acceleration response spectrum of the earthquake of each monitoring site

    EW SN UD
    1#监测点(砂岩,海拔675 m)
    2#监测点(灰岩,海拔899 m)
    3#监测点(灰岩,海拔910m)
    下载: 导出CSV

    表  6  监测点地震动峰值加速度放大系数

    Table  6.   Amplification factors of PGA

    监测点 场地类别 PGA/(×10-2 m·s-2) 放大系数
    EW SN UD EW SN UD
    1# 砂岩 3.2 2.2 1.3 1.00 1.00 1.00
    2# 灰岩 3.6 3.2 3.8 1.13 1.45 2.92
    3# 灰岩 4.0 3.6 2.2 1.25 1.63 1.69
    下载: 导出CSV

    表  7  监测点地震动Arias强度放大系数

    Table  7.   Amplification factors of Arias intensity

    监测点 场地类别 AI/(×10-5 m·s-1) 放大系数
    EW SN UD EW SN UD
    1# 砂岩 5.0 5.0 2.0 1.00 1.00 1.00
    2# 灰岩 1.3 1.5 1.1 2.60 3.00 5.50
    3# 灰岩 1.4 1.1 5.0 2.80 2.20 2.50
    下载: 导出CSV
  • Cheng G P,Wen L H,Wang S. 2011. Comparisons of various characteristic parameters of strong motions[J]. South China Journal of Seismology,31 (2): 45-53.1.
    Cui S H, Pei X J, Huang R Q, et al. 2019. Geological features and causes of the Wenchuan earthquake triggered large landslides on right bank of Huangdongzi gully[J]. Journal of Engineering Geology, 27 (2): 437-450.
    Hou H J. 2013. The seismic dynamic response characteristics of the shaking table test on horizontally layered slope[D]. Chengdu: Chengdu University of Technology.
    He J X. 2016. Research on the seismic response characteristics of the Lengzhuguan rock slope[D]. Chengdu: Chengdu University of Technology.
    He J X, Wang Y S, Luo Y H, et al. 2015. Monitoring result analysis of slope seismic response during the Kangding MS 6.3 Earthquake[J]. Journal of Engineering Geology, 23 (3): 383-393.
    Huang R Q, Wang Y S, Pei X J, et al. 2013. Characteristics of Co-seismic landslides triggered by the Lushan MS7.0 earthquake on the 20th of April, Sichuan Province, China[J]. Journal of Southwest Jiaotong University, 48 (4): 581-589.
    Jin G, Wang Y S, Shi B X, et al. 2019. Characteristics of seismic response of the 6.0-Magnitude Earthquake, Changing county of Yibin in Southwest China's Sichuan province[J]. Mountain Research, 37 (6): 943-954.
    Liu H B, Zhu X. 1999. Advance on topographic amplification effects of seismic response[J]. World Information on Earthquake Engineerting, 15 (3): 20-25.
    Li J. 1993. Conceptual differences and significances of several types of response spectrum[J]. World Information on Earthquake Engineerting, 9 (4): 9-14.
    Li X Z, Kong J M, Cui Y, et al. 2010. Statistical relations between landslides induced by Wenchuan Earthquake and earthquake parameters geological as well as geomorphological factors[J]. Journal of Engineering Geology, 18 (1): 8-14.
    Liu Y. 2016. Seismic monitoring and simulation study of fragmentation slope in west side of Qingchuan Dongshan[D]. Chengdu: Chengdu University of Technology.
    Luo Y H. 2011. Study on complex slopes response law under earthquake action[D]. Chengdu: Chengdu University of Technology.
    Li Z C, Gao M T, Chen X L, et al. 2019. Simulation of ground motion by the 2017 Jiuzhaigou MS7.0 earthquake and estimation of ground motion intensity in the Zhangzha Town[J]. Chinese Journal of Geophysics, 62 (7): 2567-2581.
    Shen M, Wang W X, Liu H W. 2007. Stability mechanism and mechanical model of stratified slope[J]. Shanxi Architecture, 33 (28): 119-120.
    Shen T, Wang Y S, Luo Y H, et al. 2018. Monitoring result and analysis of slope seismic response during the Jiuzhaigou MS7.0 earthquake[J]. Journal of Engineering Geology, 26 (6): 1161-1621.
    Wang J L, Wang Y S, Xin C C. 2018. Analysis of slope and overburden seismic response during the Jiuzhaigou MS4.5 earthquake[J]. China Science Paper, 13 (21): 2401-2407.
    Wang Y S, Liu J W, Zhao B, et al. 2019. Response characteristics of slope seismic to gongxian MS5.4 earthquake in Sichuan, China[J]. Journal of Earth Sciences and Environment, 41 (5): 613-622.
    Wang Y S, Xu H B, Luo Y H, et al. 2009. Study of formation conditions and toss motion program of high landslides induced by earthquake[J]. Chinese Journal of Rock Mechanics and Engineering, 28 (11): 2360-2368.
    Wang Y S, Zhang X, Zhang J D, et al. 2017. Seismic mountainous geo-hazard inverstigation of Dongchuan MS7.8 earthquake in 1733[J]. South-to-North Water Transfers and Water Science & Technology, 15 (1): 138-144.
    Wang Z X. 2020. Investigations of topographic effects on ground motion basedon the spectral element methods—A study case in slopes of Qingchuan County[J]. Earthquake Research of Sichuan, (1): 10-15.
    Xin C C, Wang Y S, Shen T, et al. 2018. Seismic response of Xuejiaba slope during the Jiuzhaigou MS3.2[J]. Journal of Engineering Geology, 26 (6): 1622-1630.
    Zheng G, Xu Q, Ju Y Z, et al. 2018. The Pusacun rockavalanche on August 28, 2017 in Zhangjiawan Nayongxian, Guizhou: characteristics and failure mechanism[J]. Journal of Engineering Geology, 26 (1): 223-240.
    陈国平, 温留汉·黑沙, 王帅. 2011. 多种表征强震动记录特性的参数对比分析[J]. 华南地震, 31 (2): 45-53. doi: 10.3969/j.issn.1001-8662.2011.02.006
    崔圣华, 裴向军, 黄润秋, 等. 2019. 汶川地震黄洞子沟右岸大型滑坡地质构造特征及成因[J]. 工程地质学报, 27 (2): 437-450. doi: 10.13544/j.cnki.jeg.2017-179
    侯红娟. 2013. 水平层状斜坡地震动响应特性的振动台试验研究[D]. 成都: 成都理工大学.
    贺建先. 2013. 冷竹关岩质斜坡地震动力响应特征研究[D]. 成都: 成都理工大学.
    贺建先, 王运生, 罗永红, 等. 2015. 康定MS6.3级地震斜坡地震动响应监测分析[J]. 工程地质学报, 23 (3): 383-393. 康定MS6.3级地震斜坡地震动响应监测分析
    黄润秋, 王运生, 裴向军, 等. 2013.4 ·20芦山MS7.0级地震地质灾害特征[J]. 西南交通大学学报, 48 (4): 581-589. doi: 10.3969/j.issn.0258-2724.2013.04.001
    金刚, 王运生, 史丙新, 等. 2019. 宜宾长宁MS6.0级地震斜坡动力响应特征[J]. 山地学报, 37 (6): 943-954. https://www.cnki.com.cn/Article/CJFDTOTAL-SDYA201906015.htm
    刘洪兵, 朱晞. 1999. 地震中地形放大效应的观测和研究进展[J]. 世界地震工程, 15 (3): 20-25. https://www.cnki.com.cn/Article/CJFDTOTAL-SJDC199903002.htm
    李杰. 1993. 几类反应谱的概念差异及其意义[J]. 世界地震工程, 9 (4): 9-14. https://www.cnki.com.cn/Article/CJFDTOTAL-SJDC199304002.htm
    李秀珍, 孔纪名, 崔云, 等. 2010. 汶川地震滑坡与地震参数及地质地貌因素之间的相关关系[J]. 工程地质学报, 18 (1): 8-14. doi: 10.3969/j.issn.1004-9665.2010.01.002
    刘勇. 2016. 青川东山西侧碎裂状斜坡地震动监测与模拟研究[D]. 成都: 成都理工大学.
    罗永红. 2011. 地震作用下复杂斜坡响应规律研究[D]. 成都: 成都理工大学.
    李宗超, 高孟潭, 陈学良, 等. 2019. 九寨沟MS7.0地震强地震动模拟及漳扎镇地震动强度预测[J]. 地球物理学报, 62 (7): 2567-2581. https://www.cnki.com.cn/Article/CJFDTOTAL-DQWX201907016.htm
    申敏, 王文星, 刘花维. 2007. 层状边坡失稳机制及其力学模型[J]. 山西建筑, 33 (28): 119-120. doi: 10.3969/j.issn.1009-6825.2007.28.073
    申通, 王运生, 罗永红, 等. 2018. 九寨沟MS7.0级地震斜坡地震动响应监测研究[J]. 工程地质学报, 26 (6): 1161-1621. doi: 10.13544/j.cnki.jeg.2017-446
    王荐霖, 王运生, 辛聪聪. 2018. 九寨沟MS4.5级地震斜坡体及覆盖层的动响应分析[J]. 中国科技论文, 13 (21): 2401-2407. doi: 10.3969/j.issn.2095-2783.2018.21.001
    王运生, 刘江伟, 赵波, 等. 2019. 四川珙县MS 5.4级地震斜坡地震动响应特征[J]. 地球科学与环境学报, 41 (5): 613-622. doi: 10.3969/j.issn.1672-6561.2019.05.009
    王运生, 徐鸿彪, 罗永红, 等. 2009. 地震高位滑坡形成条件及抛射运动程式研究[J]. 岩石力学与工程学报, 28 (11): 2360-2368. doi: 10.3321/j.issn:1000-6915.2009.11.027
    王运生, 张欣, 张金达, 等. 2017.1733年东川MS7.8地震山地灾害研究[J]. 南水北调与水利科技, 15 (1): 138-144. https://www.cnki.com.cn/Article/CJFDTOTAL-NSBD201701023.htm
    万子轩. 2020. 基于谱元法的地震动放大效应研究——以青川县斜坡为例[J]. 四川地震, (1): 10-15. https://www.cnki.com.cn/Article/CJFDTOTAL-SCHZ202001003.htm
    辛聪聪, 王运生, 申通, 等. 2018. 九寨沟MS3.2级余震薛家坝坡体地震动响应特征[J]. 工程地质学报, 26 (6): 1622-1630. doi: 10.13544/j.cnki.jeg.2017-475
    郑光, 许强, 巨袁臻, 等. 2018.2017年8月28日贵州纳雍县张家湾镇普洒村崩塌特征与成因机理研究[J]. 工程地质学报, 26 (1): 223-240. doi: 10.13544/j.cnki.jeg.2018.01.023
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出版历程
  • 收稿日期:  2020-10-12
  • 修回日期:  2020-11-23
  • 刊出日期:  2022-04-25

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