水平-竖向加筋饱和砂土动弹性模量试验研究

›› 2012, Vol. 33 ›› Issue (6): 1667-1672.

水平-竖向加筋饱和砂土动弹性模量试验研究

邱成春，张孟喜

上海大学土木工程系，上海 200072

收稿日期:2011-01-05 出版日期:2012-06-11 发布日期:2012-06-14
作者简介:邱成春，男，1985年生，博士研究生，主要从事加筋土动力特性的研究工作。
基金资助:
国家自然科学基金项目(No. 40972192)；上海市教育委员会科研创新项目(No. 11ZZ88)

Test research on dynamic elastic modulus of saturated sand reinforced with horizontal-vertical inclusions

QIU Cheng-chun，ZHANG Meng-xi

Department of Civil Engineering, Shanghai University, Shanghai 200072, China

Received:2011-01-05 Online:2012-06-11 Published:2012-06-14

摘要/Abstract

摘要： 利用美国GCTS公司研制的USTX-2000全自动非饱和土/饱和土动三轴仪，在不同围压下对以有机玻璃作加筋材料的H-V加筋饱和砂土进行了一系列循环荷载下动三轴试验，研究了H-V加筋饱和砂动弹性模量及阻尼比随围压、动应变、竖筋高度的变化规律，从而得到最大动弹性模量与围压的关系。试验表明，纯砂和加筋砂的动弹性模量都随动弹性应变幅的增大而减小，随围压的增大而增大，且H-V加筋砂较纯砂和水平加筋砂有效地增大了动弹性模量，并随着竖筋高度增加而增大；纯砂和加筋砂的最大动弹性模量随着围压的增大而增大，且H-V加筋随竖筋高度增加而增大；纯砂和加筋砂的阻尼比随动弹性应变幅的增大而增大，纯砂和H-V加筋砂的阻尼比随围压的变化不够显著，但有减小的趋势，H-V加筋砂阻尼比随竖筋高度的变化不明显，但加筋砂比纯砂有效地减小了阻尼比。

关键词: 水平-竖向(H-V)加筋, 动弹性模量, 阻尼比, 竖筋高度

Abstract: With USTX-2000 automatic unsaturated and saturated dynamic triaxial testing system developed by GCTS (Geotechnical Consulting and Testing Systems) company, a series of dynamic triaxial tests under cyclic loadings are performed on saturated sand reinforced with horizontal-vertical(H-V) inclusions of perspex with different confining pressures. The results of dynamic elastic modulus of saturated sand reinforced with H-V inclusions influenced by confining pressure, dynamic elastic strain and the height of vertical reinforcement are studied. Then, the relations between the maximum dynamic elastic modulus which is useful for practical engineering and confining pressure are gained. It is found that the dynamic elastic moduli of both unreinforced sand and reinforced sand decrease with the increment of dynamic elastic strain, and increase with the confining pressure increase; H-V inclusions reinforced sand improves the dynamic elastic modulus along with the increase of the height of vertical inclusion compared to unreinforced sand and conventional reinforced sand with horizontal inclusions. The maximum dynamic elastic moduli of both unreinforced sand and reinforced sand increase with the increase of confining pressure. The damping ratios of both unreinforced sand and reinforced sand increase with the increase of dynamic elastic strain. Neither the damping ratio of unreinforced sand nor that of reinforced sand is sensitive to the change of confining pressure; however, it has the tendency to decrease as the accretion of confining pressure. In addition, the damping ratio of reinforced sand is obviously decreased compared to that of unreinforced sand.

Key words: horizontal-vertical (H-V) reinforcement, dynamic elastic modulus, damping ratio, height of vertical reinforcement

中图分类号:

TU 435

邱成春，张孟喜. 水平-竖向加筋饱和砂土动弹性模量试验研究[J]. , 2012, 33(6): 1667-1672.

QIU Cheng-chun，ZHANG Meng-xi. Test research on dynamic elastic modulus of saturated sand reinforced with horizontal-vertical inclusions[J]. , 2012, 33(6): 1667-1672.

参考文献

相关文章 15

[1]	梁珂, 何杨, 陈国兴, . 南沙珊瑚砂的动剪切模量和阻尼比特性试验研究[J]. 岩土力学, 2020, 41(1): 23-31.
[2]	芮圣洁, 国振, 王立忠, 周文杰, 李雨杰, . 钙质砂与钢界面循环剪切刚度与阻尼比的试验研究[J]. 岩土力学, 2020, 41(1): 78-86.
[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]	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.
[5]	陈瑞锋，田高源，米栋云，董晓强,. 赤泥改性黄土的基本工程性质研究[J]. , 2018, 39(S1): 89-97.
[6]	张炜，李亚，周松望，蒋正波，吴非，梁文洲，. 南海北部区域黏土循环动力特性试验研究[J]. , 2018, 39(7): 2413-2423.
[7]	孔纲强，李辉，王忠涛，文磊,. 透明砂土与天然砂土动力特性对比[J]. , 2018, 39(6): 1935-1940.
[8]	刘飞禹，施静，王军，蔡袁强,. 三明治形加筋土筋-土界面动力剪切特性[J]. , 2018, 39(6): 1991-1998.
[9]	王闵闵，鹿群，郭少龙，高萌，沈仲涛，. 循环荷载作用下纤维水泥土动力特性[J]. , 2018, 39(5): 1753-1760.
[10]	吴孟桃，刘方成，陈巨龙，陈璐. 含水率对大应变下橡胶砂动剪模量和阻尼比的影响[J]. , 2018, 39(3): 803-814.
[11]	陈树峰，孔令伟，黎澄生, . 低幅应变条件下粉质黏土泊松比的非线性特征[J]. , 2018, 39(2): 580-588.
[12]	何明明，李宁，陈蕴生，朱才辉. 不同循环加载条件下岩石阻尼比和阻尼系数研究[J]. , 2017, 38(9): 2531-2538.
[13]	刘杰，雷岚，王瑞红，王飞，王连，肖蕾. 冻融循环中低应力水平加卸载作用下砂岩动力特性研究[J]. , 2017, 38(9): 2539-2550.
[14]	黄娟，丁祖德，袁铁映，赵丹，彭立敏,. 循环荷载作用下泥炭质土的动变形特性试验研究[J]. , 2017, 38(9): 2551-2558.
[15]	陈乐求，张家生，陈俊桦，陈积光，. 水泥改良泥质板岩粗粒土的静动力特性试验[J]. , 2017, 38(7): 1903-1910.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed