[1]陈 刚,刘钢一.微地震荷载作用下含断层破碎带边坡的稳定性分析[J].华南地震,2024,(01):133-148.[doi:10.13512/j.hndz.2024.01.16]
 CHEN Gang,LIU Gangyi.Stability Analysis of Slope with Fault Fracture Zone Under Micro-seismic Load[J].,2024,(01):133-148.[doi:10.13512/j.hndz.2024.01.16]
点击复制

微地震荷载作用下含断层破碎带边坡的稳定性分析()
分享到:

华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2024年01期
页码:
133-148
栏目:
土木工程防震减灾
出版日期:
2024-03-30

文章信息/Info

Title:
Stability Analysis of Slope with Fault Fracture Zone Under Micro-seismic Load
文章编号:
1001-8662(2024)01-0133-16
作者:
陈 刚刘钢一
湖北省地质环境总站,武汉 430030
Author(s):
CHEN GangLIU Gangyi
Hubei Provincial Geological Environment General Station , Wuhan 430030, China
关键词:
振动台模型试验断层破碎带动力响应规律离散元数值模拟边坡稳定性分析
Keywords:
Shaking table model test Fault fracture zone Dynamic response law Discrete element numerical simulationSlope stability analysis
分类号:
P642
DOI:
10.13512/j.hndz.2024.01.16
文献标志码:
A
摘要:
次数多、震级小的微地震作用对岩质边坡稳定性的影响是地质灾害防治中必须面对的问题,而断层破碎带又具有特殊的物理力学性质,直接影响着边坡的动力稳定。因此,研究微地震荷载作用下含断层破碎带的顺层岩质边坡的动力响应规律及稳定性具有重要意义。以某含断层破碎带的顺层岩质边坡为研究对象,开展振动台模型试验和离散元数值模拟,对微地震作用下边坡的动力响应规律,变形破坏特征和动力失稳特征进行了研究。研究结果表明:该边坡在微地震作用下的动力响应具有高程放大效应和趋表效应;GPA放大系数随振幅的增大而减小,随频率的增大而增大,同时高程越高,PGA放大系数随幅值和频率变化的幅度越大;微地震强度越大,边坡发生失稳破坏对应的微地震次数越少;边坡的稳定性系数随着微地震强度和微地震次数的增加逐渐减小;不同振动次数下,边坡稳定性系数与微地震强度之间符合线性衰减的关系;当微地震次数为4500次时,微地震强度对于边坡稳定性的影响最大。
Abstract:
The influence of frequently-occurring small-magnitude micro-seismic action on the stability of rock slope cannot be ignored in the prevention and control of geological disasters. Moreover, the fault fracture zone characterized by special physical and mechanical properties directly affects the dynamic stability of the slope. Therefore,it is of great significance to study the dynamic response law and stability of bedding rock slope with fault fracture zone under micro-seismic load. Taking a bedding rock slope with fault fracture zone as the research object, shaking table model test and discrete element numerical simulation were carried out to explore the dynamic response law, deformation and failure characteristics and dynamic instability characteristics of the slope under micro-seismic action. The results show that the dynamic response of the slope under micro-seismic action exhibits elevation amplification effect and surface effect. The amplification coefficient of ground peak acceleration(GPA) decreases with the increase of amplitude and increases with the frequency. Meanwhile, the higher the elevation, the greater the amplitude of PGA amplification coefficient with amplitude and frequency. The greater the intensity of the micro-seismic, the less the number of micro-seismic corresponding to the failure of the slope ; the stability coefficient of the slope gradually decreases with the increase of micro-seismic intensity and micro-seismic times. Under different vibration times, the relationship between slope stability coefficient and micro-seismic intensity follows linear attenuation. When the number of micro-seismic events reaches 4500,the micro-seismic intensity has the greatest influence on the slope stability.

参考文献/References:

[1] 李炜. 边坡稳定可靠性研究[D]. 大连:大连理工大学, 2009.
[2]潘添.地震荷载作用下边坡的动力响应与抗滑桩加固边坡稳定性分析[D].广州:广州大学,2021.
[3]周飞,许强,刘汉香,等.地震作用下含水平软弱夹层斜坡动力响应特性研究[J].岩土力学,2016,37(01):133-139.
[4]冯志仁,刘红帅,于龙.地震作用下含软弱夹层顺层岩质边坡表面放大效应研究[J].防灾减灾工程学报,2014,34 (01):96-100.
[5]董温奇.含软弱夹层顺层岩质滑坡的振动台模型试验[D].西安:长安大学,2022.
[6]赵飞,俞松波,李博,等.地震作用下岩质边坡大型振动台试验研究进展[J].地球科学,2022,47(12):4498-4512.
[7]冯细霞,姜清辉,张慧超,等.岩质边坡地震响应振动台试验研究[J].振动.测试与诊断,2018,38(03):575-582.
[8]江学良,牛家永,杨慧,等.下伏隧道层状岩质边坡地震响应特性的大型振动台试验研究[J].应用力学学报,2018,35 (04):762-768+931.
[9]刘汉香,许强,周飞,等.含软弱夹层斜坡地震动力响应特性的振动台试验研究[J].岩石力学与工程学报,2015,34 (05):994-1005.
[10]宋健,陆朱汐,谢华威,等.地震作用下分层土边坡多滑面变形破坏的数值模拟研究[J].地震工程学报,2023,45 (02):296-305.
[11]盛建龙,严寒冰,胡斌,等.含软弱夹层边坡地震动力响应及变形破坏机制研究[J].金属矿山,2022(12):214-220.
[12]刘康琦,刘红岩.地震作用下土石混合体边坡稳定性分析研究[J].防灾减灾工程学报,2022,42(01):224-230.
[13]邓东平,李亮,赵炼恒.地震作用下边坡稳定性分析的拟静力法研究[J].中南大学学报(自然科学版),2014,45 (10):3578-3588.
[14]屈波,邹晖,顾强康,等.地震荷载作用下加筋高边坡的稳定性分析[J].空军工程大学学报(自然科学版),2014,15 (02):81-85.
[15]郭建军,王俊杰.地震作用下反倾岩土复合边坡稳定性分析[J]. 重庆交通大学学报(自然科学版),2023,42 (01):74-82.
[16]何春梅.循环动载下泥质软岩力学行为及库区软硬互层边坡动力稳定性研究[D].重庆:重庆大学,2018.
[17]周泽华,吕艳,苏生瑞,等.花岗岩质边坡地震动力响应及破坏特征大型振动台试验研究[J].岩土力学,2022,43 (04):918-931.
[18]徐冠军.滇西南地区高边坡抗震性能振动台模拟试验研究[D].西安:长安大学,2015.
[19]刘汉香,周逸飞,李欣.层状复合岩体边坡动力特性及地震响应特性的振动台试验研究[J].岩石力学与工程学报, 2021,40(04):676-689.
[20]范刚,张建经,付晓,等.含泥化夹层顺层岩质边坡动力响应大型振动台试验研究[J]. 岩石力学与工程学报, 2015,34(09):1750-1757.

备注/Memo

备注/Memo:
收稿日期:2023-08-07
作者简介:陈刚(1982-),男,高级工程师,从事水工环地质、生态修复及地质灾害风险评价方面的研究。E-mail:2926151670@qq.com
更新日期/Last Update: 2024-03-30