粉煤灰改性黄土动力特性研究
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- 英文论文题名：Study on the dynamic properties of loess improved with fly ash
- 论文作者：王峻 ; 钟秀梅 ; 王强 ; 王平 ; 王谦 ; 柴少峰
- 英文论文作者：WANG Jun ; ZHONG Xiu-mei ; WANG Qiang ; WANG Ping ; WANG Qian ; CHAI Shao-feng ; Lanzhou Institute of Seismology CEA ; Key Laboratory of Loess Earthquake Engineering CEA ; Geotechnical Disaster Prevention Engineering Technology Research Center of Gansu Province
- 年：2016
- 作者机构：中国地震局兰州地震研究所;中国地震局黄土地震工程重点实验室;甘肃省岩土防灾工程技术研究中心;
- 论文关键词：粉煤灰 ; 黄土 ; 动力特性 ; 动弹性模量 ; 阻尼比
- 英文论文关键词：fly ash ; loess ; dynamic property ; dynamic elastic modulus ; damping ratio
- 会议召开时间：2016-09-05
- 会议录名称：2016年全国工程勘察学术大会论文集（上册）
- 英文会议录名称：Geotechnical Investigation & Surveying
- 语种：中文
- 分类号：TU444;TU435
- 学会代码：ZJKC
- 会议名称：2016年全国工程勘察学术大会
- 会议地点：中国山西太原
- 主办单位：全国建筑工程勘察科技情报网、全国建筑工程勘察科技情报网华北情报站、中国建筑学会工程勘察分会
- 学会名称：中国建筑学会工程勘察分会
- 页数：6
- 文件大小：523k
- 原文格式：O
- 会议级别：全国
摘要
采用动三轴试验系统对粉煤灰改性黄土试样进行固结不排水动三轴试验。研究了不同掺量粉煤灰改性黄土的动弹性模量和阻尼比的变化规律及主要影响因素,并与素黄土试样试验结果进行了对比。研究结果表明,不同掺量粉煤灰改性黄土的动弹性模量随动应变的增加而逐渐减小,且减小的幅度越来越小;粉煤灰改性黄土的阻尼比总体上随动应变的增大呈现上升趋势,且不同掺量粉煤灰改性黄土的阻尼比随动应变的增长速率存在差异;得到了随粉煤灰掺量增加,粉煤灰改性黄土的动弹性模量增大,阻尼比减小的规律;采用幂函数建立了阻尼比与动应变关系表达式来间接模拟初始偏应力作用下不同掺量粉煤灰改性黄土阻尼比的变化规律。综合分析表明,粉煤灰掺量存在一个合理范围,黄土中掺入20%左右的粉
A series of dynamic triaxial tests under the conditions of consolidation and undrainage were conducted on the improved loess samples with fly ash.The test results are compared with that of unimproved loess,and the changing laws and influencing factors of dynamic modulus and damping ratio for the improved loess with different proportions of fly ash are analyzed.The test results show that for the improved loess with any proportions of fly ash the dynamic elastic modulus decreases with the increment of dynamic strain and,the decrement become smaller and smaller.Comparatively,the damping ratio increases with the increment of dynamic strain,and the increment speeds are different when the proportion of fly ash to loess changes.It is also shown that the dynamic elastic modulus increases while the damping ratio decreases as the incorporation of fly ash increases,and that the relationship between damping ratio and dynamic strain for the improved loess with different proportions of fly ash under some certain deviatonic stress can be modeled by the power function.Finally,it can be suggested that the proportion of fly ash has a rational value of about 20%when the dynamic properties of loess can be well improved.
A series of dynamic triaxial tests under the conditions of consolidation and undrainage were conducted on the improved loess samples with fly ash.The test results are compared with that of unimproved loess,and the changing laws and influencing factors of dynamic modulus and damping ratio for the improved loess with different proportions of fly ash are analyzed.The test results show that for the improved loess with any proportions of fly ash the dynamic elastic modulus decreases with the increment of dynamic strain and,the decrement become smaller and smaller.Comparatively,the damping ratio increases with the increment of dynamic strain,and the increment speeds are different when the proportion of fly ash to loess changes.It is also shown that the dynamic elastic modulus increases while the damping ratio decreases as the incorporation of fly ash increases,and that the relationship between damping ratio and dynamic strain for the improved loess with different proportions of fly ash under some certain deviatonic stress can be modeled by the power function.Finally,it can be suggested that the proportion of fly ash has a rational value of about 20%when the dynamic properties of loess can be well improved.
引文
[1]张振中.黄土地震灾害预测[M].北京:地震出版社,1999.
[2]谢定义试论我国黄土力学研究中的若干新趋向[J].岩土工程学报,2001,23(1):3-13.
[3]段汝文,张振中,李兰,等.黄土动力特性的进一步研究[J].西北地震学报,1990,12(3):72-78.
[4]邓龙胜,范文.地震荷载作用下黄土的动应力应变关系研究[J].岩石力学与工程学报,2012,31(S1):3174 31 80
[5]王志杰,骆亚生,王瑞瑞,等.不同地区原状黄土动剪切模量与阻尼比试验研究[J].岩土工程学报,2010,32(9):1464-1469
[6]王峻,王强,杨宝平,等.基于含水率变化的黄土场地震陷评价预测[J].岩石力学与工程学报,2015,34(10):21 55-2160.
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[8]高振林、刘嘉学、韦寒波等,粉煤灰影响湿陷性黄土工程性质试验[J].北方工业大学学报,2007,19(1):91-94.
[9]兰常玉、薛鹏、周俊英,粉煤灰改良膨胀土的动强度试验研究[J].防灾减灾工程学报,2010,30(S):79-81.
[10]赵少强、别大华、邓剑辰,粉煤灰改良黄土填料的试验研究[J].铁道建筑技术,2006(3):47-50.
[11]王德卿、贾刚、贾喜荣等.粉煤灰对湿陷性黄土工程性质的影响[J].粉煤灰综合利用,2001,(6):47-48.
[12]谢定义.黄土动力学[M].北京:高等教育出版社,2011.
[13]王峻,王强,王杰民.震后黄土动力学特性试验研究[J].水文地质工程地质,2010,37(4):63-67.
[14]毕雪梅,赵瑞斌,曲国胜.循环荷载下天津吹填土动应力应变关系研究[J].工程勘察,2014,(1):1-5.
[15]张向东,曹启坤,潘宇.二灰改良土动力特性试验研究[J].岩土力学,2010,31(8):2560-2564.
[16]穆坤,郭爱国,柏巍,等.循环荷载作用下广西红黏土动力特性试验研究[J].地震工程学报,2015,37(2):487-493.
[17]贾存兴,粉煤灰改良高速公路路基填料的试验研究[J].华东公路,2009(1):42-44.
[18]王峻,王谦,钟秀梅,等.粉煤灰与动载耦合作用下黄土震陷试验研究[J].水文地质工程地质,2014,41(6):70-75.
[2]谢定义试论我国黄土力学研究中的若干新趋向[J].岩土工程学报,2001,23(1):3-13.
[3]段汝文,张振中,李兰,等.黄土动力特性的进一步研究[J].西北地震学报,1990,12(3):72-78.
[4]邓龙胜,范文.地震荷载作用下黄土的动应力应变关系研究[J].岩石力学与工程学报,2012,31(S1):3174 31 80
[5]王志杰,骆亚生,王瑞瑞,等.不同地区原状黄土动剪切模量与阻尼比试验研究[J].岩土工程学报,2010,32(9):1464-1469
[6]王峻,王强,杨宝平,等.基于含水率变化的黄土场地震陷评价预测[J].岩石力学与工程学报,2015,34(10):21 55-2160.
[7]夏琼、杨有海、耿煊,粉煤灰与石灰、水泥改良黄土填料的试验研究[J].兰州交通大学学报,2008,27(3):40-43.
[8]高振林、刘嘉学、韦寒波等,粉煤灰影响湿陷性黄土工程性质试验[J].北方工业大学学报,2007,19(1):91-94.
[9]兰常玉、薛鹏、周俊英,粉煤灰改良膨胀土的动强度试验研究[J].防灾减灾工程学报,2010,30(S):79-81.
[10]赵少强、别大华、邓剑辰,粉煤灰改良黄土填料的试验研究[J].铁道建筑技术,2006(3):47-50.
[11]王德卿、贾刚、贾喜荣等.粉煤灰对湿陷性黄土工程性质的影响[J].粉煤灰综合利用,2001,(6):47-48.
[12]谢定义.黄土动力学[M].北京:高等教育出版社,2011.
[13]王峻,王强,王杰民.震后黄土动力学特性试验研究[J].水文地质工程地质,2010,37(4):63-67.
[14]毕雪梅,赵瑞斌,曲国胜.循环荷载下天津吹填土动应力应变关系研究[J].工程勘察,2014,(1):1-5.
[15]张向东,曹启坤,潘宇.二灰改良土动力特性试验研究[J].岩土力学,2010,31(8):2560-2564.
[16]穆坤,郭爱国,柏巍,等.循环荷载作用下广西红黏土动力特性试验研究[J].地震工程学报,2015,37(2):487-493.
[17]贾存兴,粉煤灰改良高速公路路基填料的试验研究[J].华东公路,2009(1):42-44.
[18]王峻,王谦,钟秀梅,等.粉煤灰与动载耦合作用下黄土震陷试验研究[J].水文地质工程地质,2014,41(6):70-75.
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