风积砂-黄土过渡型砂性黄土动力特性试验研究

骆建文, 李喜安, 赵宁, 周健, 赵兴考

骆建文, 李喜安, 赵宁, 周健, 赵兴考. 2016: 风积砂-黄土过渡型砂性黄土动力特性试验研究. 工程地质学报, 24(5): 915-923. DOI: 10.13544/j.cnki.jeg.2016.05.022
引用本文: 骆建文, 李喜安, 赵宁, 周健, 赵兴考. 2016: 风积砂-黄土过渡型砂性黄土动力特性试验研究. 工程地质学报, 24(5): 915-923. DOI: 10.13544/j.cnki.jeg.2016.05.022
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LUO Jianwen, LI Xi'an, ZHAO Ning, ZHOU Jian, ZHAO Xingkao. 2016: EXPERIMENTAL STUDY ON DYNAMIC CHARACTERISTICS OF SANDY LOESS OF AEOLIAN SAND TO LOESS TRANSITIONAL ORIGIN. JOURNAL OF ENGINEERING GEOLOGY, 24(5): 915-923. DOI: 10.13544/j.cnki.jeg.2016.05.022
Citation: LUO Jianwen, LI Xi'an, ZHAO Ning, ZHOU Jian, ZHAO Xingkao. 2016: EXPERIMENTAL STUDY ON DYNAMIC CHARACTERISTICS OF SANDY LOESS OF AEOLIAN SAND TO LOESS TRANSITIONAL ORIGIN. JOURNAL OF ENGINEERING GEOLOGY, 24(5): 915-923. DOI: 10.13544/j.cnki.jeg.2016.05.022
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风积砂-黄土过渡型砂性黄土动力特性试验研究

  • ①.

    西安长庆科技工程有限责任公司 西安 710021

  • ②.

    长安大学地质与测绘工程学院 西安 710054

  • ③.

    国土资源部岩土工程开放研究实验室 西安 710054

  • ④.

    陕西交建公路工程试验检测有限公司 西安 710117

  • ⑤.

    河北省地矿局第一地质大队 邯郸 056001

基金项目: 

国家自然科学基金项目 No.41172255，41572264，41440044

中央高校基本科研业务费项目 2014G2260008

西安长庆科技工程有限责任公司项目 CTEC（2014）Z-KY-013

详细信息
    作者简介:

    骆建文(1979-),男,学士,高级工程师,从事工程地质及岩土工程勘察工作.Email:420394101@qq.com

    通讯作者:

    李喜安(1968-),男,博士,教授,博士生导师,主要从事黄土地质灾害方面的教学与科研工作.Email:dclixa@chd.edu.cn

  • 中图分类号: P642.13+1

EXPERIMENTAL STUDY ON DYNAMIC CHARACTERISTICS OF SANDY LOESS OF AEOLIAN SAND TO LOESS TRANSITIONAL ORIGIN

  • ①.

    Company Limited of Chang-qing Science and Technology, Xi'an 710021

  • ②.

    School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054

  • ③.

    Open Research Laboratory of Geotechnical Engineering, Ministry of Land and Resources, Xi'an 710054

  • ④.

    Shanxi Provincial Communication Construction Testing & Measuring Co., Ltd., Xi'an 710117

  • ⑤.

    No. 1 Geology Team of Exploration Bureau of Hebei Province, Handan 056001

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    摘要
  • 摘要: 随着沙漠-黄土高原过渡地带各类资源的不断勘探和开发，对风积砂-黄土过渡型砂性黄土的动力特性缺乏了解这一问题愈来愈成为此类地区地震与人工动力相关工程建设发展的制约因素。本文在等压固结条件下，通过进行室内固结不排水动三轴试验，获得了风积砂-黄土过渡型砂性黄土的动力学参数，并以此为基础绘制了风积砂-黄土过渡型砂性黄土的动应力-应变关系曲线，探讨了风积砂-黄土过渡型砂性黄土动模量的变化特征、阻尼比随动剪应变变化的曲线关系及适合的拟合模型，进一步建立了适用于风积砂-黄土过渡型砂性黄土的等效动黏弹性本构模型。结果表明：Hardin双曲线模型对风积砂-黄土过渡型砂性黄土动剪切模量与动剪应变关系曲线的拟合较好，而幂函数经验公式对阻尼比与动剪应变关系曲线的拟合较好。本文研究结果为风积砂-黄土过渡型砂性黄土动力特性的研究提供了基础。
    Abstract: With the exploration and development of various kinds of resources in area of desert-loess plateau, poor understanding about the dynamic characteristics of sandy loess of aeolian sand to loess transifional origin has become the constraint more than ever in this region. This issue is particular for development of earthquakes and artificial power engineering construction. In this paper, under isotropic consolidation condition, consolidated undrained dynamic triaxial tests under different confining pressures are tested for the aeolian sand-loess transitional sandy loess. Kinetic parameters are obtained. Based on them, the dynamic stress-strain relationship of aeolian sand-loess transitional sandy loess was drawn. The change characteristic of dynamic shear modulus and damping ratio with dynamic strain of their relation curve and fitting model is explored. Equivalent dynamic visco-elastic constitutive model is further established for applicable to aeolian sand-loess transitional sandy loess. Results show that the relation curve between dynamic shear modulus and dynamic strain fits well for aeolian sand-loess transitional type of sandy loess, according to the Harding hyperbolic model. Besides, the power function model is good for fitting the relationship between damping ratio and dynamic strain. The results achieved in this paper provide basic data for the future research of dynamic characteristics of aeolian sand-loess transitional sandy loess.
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  • 图  1   土样的颗粒大小分布累积曲线

    Figure  1.   The particle size and distribution of the soil cumulative curve

    下载: 全尺寸图片 幻灯片

    图  2   τd-γd关系曲线

    Figure  2.   Relation curves of τd-γd

    下载: 全尺寸图片 幻灯片

    图  3   1/Gd-γd关系曲线

    Figure  3.   Relation curves of 1/Gd-γd

    下载: 全尺寸图片 幻灯片

    图  4   Gd/Gmax-γd关系曲线及λ-γd关系曲线

    Figure  4.   Relation curves of Gd/Gmax-γd and Relation curves of λ-γd

    下载: 全尺寸图片 幻灯片

    图  5   不同模型拟合曲线比较

    Figure  5.   Comparison of fitting curves of different models

    下载: 全尺寸图片 幻灯片

    图  6   阻尼比试验点曲线与双曲模型、幂函数经验公式比较

    Figure  6.   Compare of the damping ratio curve of test point and the hyperbolic model and power function empirical formula

    下载: 全尺寸图片 幻灯片

    图  7   初始模量与有效固结压力关系拟合曲线

    Figure  7.   Fitting curves of initial modulus and effective consolidation pressure

    下载: 全尺寸图片 幻灯片

    表  1   试样的基本物理参数

    Table  1   Basic physical parameters of the sample

    取样深度/m天然密度ρ/g·cm-3天然含水率W/%塑限WP/%液限WL/%
    31.6510.915.1427.67
    下载: 导出CSV

    表  2   线性拟合回归参数

    Table  2   Linear fitting regression parameters

    回归方程固结围压Kc/kPa回归参数
    abGmax/MPa
    1/Gd=a＋b*γd500.024615.933140.65
    1000.022813.768743.86
    1500.019912.059550.25
    2000.01609.627562.50
    下载: 导出CSV

    表  3   幂函数经验公式回归曲线参数

    Table  3   Parameters of power function empirical formula regression curve

    回归模型固结围压Kc/kPa回归参数R2
    λmaxβ
    y=λmax(1-x)β500.23980.80240.982
    1000.19880.95960.983
    1500.1540.7520.978
    2000.20480.82290.982
    均值0.19940.83420.981
    下载: 导出CSV

    表  4   陈国兴经验公式回归曲线参数

    Table  4   Parameters of Chen Guoxing empirical

    回归模型固结围压Kc/kPa回归参数R2
    λminλ0β
    y=λmin＋λ0（1-x）β50-0.05870.28900.52310.989
    100-0.01630.21090.80930.983
    150-0.27790.41440.15580.99
    200-0.04030.23300.55720.988
    均值-0.09830.28680.51130.988
    下载: 导出CSV

    表  5   本构模型拟合参数

    Table  5   Fitting parameters of constitutive model

    干密度/g·cm-3 Kmax n λmax β νd
    1.65 467.398 0.3214 0.1994 0.8342 0.25
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-04-09
  • 修回日期:  2016-07-25
  • 网络出版日期:  2021-04-21
  • 刊出日期:  2016-10-24

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