›› 2019, Vol. 33 ›› Issue (3): 384-388.

• 工程实录 • 上一篇    下一篇

地铁隧道周围粉质黏土动力参数试验研究

赵中华1,雷 勇2,陆法潭3   

  1. (1.沈阳城市建设学院 土木工程系,沈阳 110167;2.中国建筑材料工业地质勘查中心辽宁总队,沈阳 110004;3.中冶沈勘工程技术有限公司,沈阳 110116)
  • 收稿日期:2019-01-24 修回日期:2019-02-14 出版日期:2019-06-20 发布日期:2019-08-16
  • 作者简介:赵中华(1978-),女,副教授,硕士,研究方向为岩土工程。
  • 基金资助:

    辽宁省教育厅科学研究一般项目(L2014570);沈阳城市建设学院岩土工程科研团队资助项目

Experimental Study on Dynamic Parameters of the Silty Clay Surrounding a Metro Tunnel

ZHAO Zhonghua1, LEI Yong2, LU Fatan3   

  1. (1.Department of Civil Engineering, Shenyang Urban Construction University, Shenyang 110167;
    2.Liaoning Division, China National Geological Exploration Center of Building Materials Industry, Shenyang 110004;
    3.Shen Kan Engineering & Technology Co. MCC, Shenyang 110016)
  • Received:2019-01-24 Revised:2019-02-14 Online:2019-06-20 Published:2019-08-16

摘要: 利用GDS共振柱试验仪,对地铁隧道周围粉质黏土进行动力参数(动剪切模量和阻尼比)研究,分析在不同围压试验条件下三种粉质黏土动剪切模量和阻尼比变化规律。试验结果表明:随着动剪应变的增大,动剪切模量逐渐减小,阻尼比逐渐增大;围压越大,动剪切模量越大,阻尼比越小,且围压对动剪切模量的影响效果要显著于阻尼比;液性指数越小的土体,围压对阻尼比的影响效果越显著;最大动剪切模量与围压、参考剪应变与围压、最大阻尼比与围压均存在较好的线性关系。

关键词: 粉质黏土, 动剪切模量, 阻尼比

Abstract: The dynamic parameters (dynamic shear modulus and damping ratio) of a silty clay surrounding the metro tunnel were studied by using the GDS resonant column test and the dynamic shear modulus and damping ratio of the silty clay samples were analyzed under different confining pressures. The results show that, with the increase of dynamic shear strain, the dynamic shear modulus decreases and the damping ratio increases; with the increase of confining pressure, the dynamic shear modulus increases and the damping ratio decreases and the effect of confining pressures on the dynamic shear modulus is more significant than that of the damping ratio; the liquid index has smaller effect, the effect of the confining pressure on the damping ratio is more obvious; the relationships between the maximum dynamic shear modulus and the confining pressure, the reference shear strain and the confining pressure, the maximum damping ratio and confining pressure has a good linear relationship.

Key words: Silty Clay, Dynamic Shear Modulus, Damping Ratio