某土石坝心墙料和坝基料动模量阻尼特性的试验研究

›› 2008, Vol. 29 ›› Issue (S1): 79-84.

某土石坝心墙料和坝基料动模量阻尼特性的试验研究

张茹^1,2,3，陈群^1,2，何昌荣^1,2，费文平^1,2,3

1. 四川大学水利水电学院，2. 四川大学水力学与山区河流开发保护重点实验室，3. 四川大学工程科学与灾害力学研究所，成都 610065

收稿日期:2007-07-25 出版日期:2008-11-11 发布日期:2016-04-15
作者简介:张茹，女，1976年生，博士研究生，讲师，主要从事岩土工程教学和科研工作
基金资助:
国家自然科学基金资助（No. 50709022; 50579042）；教育部新世纪优秀人才支持计划资助（No. NCET-07-0569）。

Experimental research on dynamic modulus and damping characteristics of core cohesive soil and dam foundation gravel of an embankment dam

ZHANG Ru^1,2,3, CHEN Qun^1,2, HE Chang-rong^1,2, FEI Wen-ping^1,2,3

1. College of Water Resources and Hydropower, Sichuan University, Chengdu 610065, China; 2. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China; 3. Institute of Engineering Science and Disaster mechanics, Sichuan University, Chendu 610065, China

Received:2007-07-25 Online:2008-11-11 Published:2016-04-15

摘要/Abstract

摘要： 土石坝震害将导致严重后果，目前国内外修筑于地震区的土石坝在抗震设计时都进行了动力分析。室内动力试验提供土石料可靠的动强度和动力参数是土石坝地震动力分析准确性的关键。水牛家心墙土石坝坝高100多米，大坝设防烈度9度，采用动三轴仪，对其坝基②层细砂砾料和心墙防渗土料进行大量的动力特性试验研究，分析两种土料的动模量阻尼特性，并简述其影响因素。分析试验结果有：使用一个试样完成三个不同的围压力?3c或固结比Kc，与《土工试验规程》推荐方法相比，大大减小了试验和分析工作量, 且有相当的规律性和准确程度；动模量阻尼比的主要影响因素是动应变幅、围压力、固结主应力比、孔隙比等。动应变水平影响动模量阻尼成倍增减，动模量随围压力?3c增减而增减，阻尼比D随?3c的升高而略有减小，动模量和阻尼比随固结比Kc增减而增减，Kc从1到2可使心墙土料的Edmax增加60％左右；土类不同，模量阻尼也不尽相同。水牛家心墙料的动模量较高，阻尼比较小，不易产生动力破坏。

关键词: 土石坝, 地震, 动三轴试验, 动模量, 阻尼比

Abstract: Earthquake disaster of embankment dams will lead to serious results. At present embankment dams located at seismic area are all dynamically analyzed during aseismic design. Credible dynamic parameters of dam materials obtained from indoor tests are the key to the accuracy of dynamical analysis. Shuiniujia Core Embankment Dam is over 100 meters high and its earthquake fortify intensity is nine. Dynamic characteristics of core cohesive soil and damfoundation gravel are studied through the dynamic triaxial tests. And the dynamic modulus, damping ratio and their influencing factors are analyzed. The results show that the method of using one sample to finish the tests of three different confining pressures ?3c and three different consolidation ratios Kc is feasible, and has accuracy and regularity comparing with the method suggested by “Soil Mechanics Laboratory Regulations”. There are many factors affecting dynamic modulus “Ed” and damping ratio “D”, such as dynamic strain level, confining pressure, consolidated stress ratio and porosity ratio, etc.; “Ed” decreases and “D” increases very rapidly with strain level. And “Ed” increases while “D” decreases with confining pressure. Both “Ed” and “D” increases with consolidated stress ratio. Dynamic modulus and damping ratio are different due to different soils. And dynamic modulus of core cohesive soil of Shuiniujia Embankment Dam are high while its damping ratio is much lower; so it is not easy to suffer the dynamic destroy.

Key words: embankment dam, earthquake, dynamic triaxial test, dynamic modulus, damping ratio

中图分类号:

TU 411

张茹，陈群，何昌荣，费文平 . 某土石坝心墙料和坝基料动模量阻尼特性的试验研究[J]. , 2008, 29(S1): 79-84.

ZHANG Ru , CHEN Qun , HE Chang-rong , FEI Wen-ping . Experimental research on dynamic modulus and damping characteristics of core cohesive soil and dam foundation gravel of an embankment dam[J]. , 2008, 29(S1): 79-84.

参考文献

相关文章 15

[1]	徐鹏, 蒋关鲁, 雷涛, 刘琪, 王智猛, 刘勇, . 考虑填土强度的加筋土挡墙动位移计算[J]. 岩土力学, 2019, 40(5): 1841-1846.
[2]	邵生俊, 陈菲, 邓国华, . 基于平面应变统一强度公式的结构性黄土填料挡墙地震被动土压力研究[J]. 岩土力学, 2019, 40(4): 1255-1262.
[3]	梁珂, 陈国兴, 何杨, 刘景儒, . 基于相关函数理论的动模量和阻尼比计算新方法[J]. 岩土力学, 2019, 40(4): 1368-1376.
[4]	刘汉香, 许强, 朱星, 周小棚, 刘文德. 含软弱夹层斜坡地震动力响应过程的边际谱特征研究[J]. 岩土力学, 2019, 40(4): 1387-1396.
[5]	雷文杰, 李金雨, 云美厚, . 采动微地震波传播与衰减特性研究[J]. 岩土力学, 2019, 40(4): 1491-1497.
[6]	孙广臣, 谢佳佑, 何山, 傅鹤林, 江学良, 郑亮, . 不同方向地震激励下软岩桥隧搭接段动力响应研究[J]. 岩土力学, 2019, 40(3): 893-902.
[7]	徐鹏, 蒋关鲁, 邱俊杰, 高泽飞, 王智猛, . 整体刚性面板加筋土挡墙振动台模型试验研究[J]. 岩土力学, 2019, 40(3): 998-1004.
[8]	裴向军, 朱凌, 崔圣华, 张晓超, 梁玉飞, 高会会, 张子东. 大光包滑坡层间错动带液化特性及滑坡启动成因探讨[J]. 岩土力学, 2019, 40(3): 1085-1096.
[9]	熊仲明, 张朝, 陈轩. 地震作用下地裂缝场地地震动参数试验研究[J]. 岩土力学, 2019, 40(2): 421-428.
[10]	巨能攀, 邓天鑫, 李龙起, 蒋金阳, 张陈羊. 强震作用下陡倾顺层斜坡倾倒变形机制离心振动台试验[J]. 岩土力学, 2019, 40(1): 99-108.
[11]	许成顺, 豆鹏飞, 高畄成, 陈苏, 杜修力, . 地震动持时压缩比对可液化地基地震反应影响的振动台试验[J]. 岩土力学, 2019, 40(1): 147-155.
[12]	庄心善, 王俊翔, 王康, 李凯, 胡智. 风化砂改良膨胀土的动力特性研究[J]. 岩土力学, 2018, 39(S2): 149-156.
[13]	周雄雄, 迟世春, 贾宇峰, 谢芸菲, . 高土石坝填筑过程的精细化模拟方法[J]. 岩土力学, 2018, 39(S2): 443-450.
[14]	尹小涛，严飞，秦雨樵，周磊，王东英, . 地震作用下华丽高速公路金沙江桥华坪岸顺层边坡动力稳定性评价[J]. , 2018, 39(S1): 387-394.
[15]	代仲海，胡再强，尹小涛，吴振君，. 工程荷载作用下缓倾角反倾似层状岩质边坡变形稳定性分析[J]. , 2018, 39(S1): 412-418.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed