河北水利电力学院学报

河北水利电力学院学报 ›› 2020, Vol. 30 ›› Issue (1): 1-6.DOI: 10.16046/j.cnki.issn2096-5680.2020.01.001

• 技术理论与应用 •    下一篇

东北五常地区淤泥质软土指标相关性分析

叶朝良1，2，孟德强1，王海强3   

  1. 1.石家庄铁道大学土木工程学院，河北省石家庄市北二环东路17号 050043;
    2.石家庄铁道大学土木工程学院道路与铁道工程安全保障省部共建教育部重点实验室，河北省石家庄市北二环东路17号 050043;
    3.中国兵器工业北方勘察设计研究院有限公司，河北省石家庄市建华南大街45号 050011

  • 收稿日期:2019-10-30 修回日期:2020-01-05 出版日期:2020-03-31 发布日期:2020-04-30
  • 通讯作者: 孟德强(1993-)，男，河北邢台人，硕士研究生，研究方向为岩土工程治理与防护｡E-mail:504057619@qq.com
  • 作者简介:叶朝良(1969-)，男，安徽宁国人，教授，博导，长期从事特殊土工程性质､岩土工程灾害机理及防治方面的教学与科研工作｡E-mail:yechl@stdu.edu.cn
  • 基金资助:
    国家电网公司总部科技项目(5204BB18001G);; 中铁十一局集团有限公司科研计划项目(201801)

Correlation Analysis of Silty Soft Soil Index in Wuchang Area of Northeast China

YE Chao-liang1，2，MENG De-qiang1，WANG Hai-qiang3   

  1. 1.School of Civil Engineering，Shijiazhuang Tiedao University，050043，Shijiazhuang，Hebei，China;
    2.Key Laboratory of Road and Railway Engineering Safety Control of Ministry of Education，Shijiazhuang Tiedao University，050043，Shijiazhuang，Hebei，China;
    3.China Ordnance Industry North Survey and Design Research Institute Co.，Ltd.，050011，Shijiazhuang，Hebei，China

  • Received:2019-10-30 Revised:2020-01-05 Online:2020-03-31 Published:2020-04-30

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摘要： 岩土体参数具有区域性特点,开展区域性土的物理力学参数相关性研究极具实践价值。通过对95组东北五常地区淤泥质软土物理力学指标的统计分析,得到以下结论和建议:(1)该淤泥质软土具有高含水率、高压缩性、大孔隙比和强度低的软土特性,但物理力学参数变化范围大,变异系数高,平均抗剪强度略高于沿海地区淤泥质软土;(2)天然密度、干密度与天然含水量之间呈现高度相关的对数关系;(3)天然含水率w、液限w_L、塑限w_P与塑性指数I_P、液限w_L和塑限w_P呈现高度相关线性关系;(4)孔隙比e与天然含水率w、天然密度ρ、干密度ρ_d高度相关,分别呈线性和指数关系,与颗粒比重G_s呈现显著的对数关系。(5)压缩模量E_(s1-2)和压缩系数a_(1-2)与天然含水量w、天然密度ρ、干密度ρ_d以及孔隙比e等4个指标几乎都具高度相关性,表明这些参数对土体的变形影响很大;与颗粒比重Gs中度相关,与液性指数和饱和度无相关性。抗剪强度参数与上述7个物性指标间的拟合结果却反映了无相关性。文中拟合得到了一些有价值的经验公式,以期为五常地区工程设计中淤泥质软土参数取值提供参考和依据。

关键词: 五常地区, 淤泥质软土, 参数指标, 相关性分析

Abstract: The geotechnical parameters have regional characteristics and it is of great practical value to study the correlation of physical and mechanical parameters.Based on the statistical analysis of physical and mechanical indexes of 95groups of silty soft soil in Wuchang area of northeast China.The following conclusions and suggestions are obtained.First，the silty soft soil has the characteristics of high water content，high compressibility，large pore ratio and low strength，but the range of physical and mechanical parameters is large，the coefficient of variation is high，and the average shear strength is slightly higher than the coastal silty soft soil.Second，natural density，dry density and natural water content are highly correlated logarithm.Third，natural moisture content，liquid limit and plastic limit are highly correlated with plastic index，liquid limit and plastic limit.Fourth，the pore ratio is highly correlated with natural moisture content，natural density and dry density，with linear and exponential relationships respectively，and has a significant logarithmic relationship with particle specific gravity.Fifth，compression modulus and compressibility are highly correlated with natural water content，natural density，dry density and pore ratio，which shows that these parameters have great influence on soil deformation.It was moderately correlated with particle specific gravity，but not with liquid index and saturation.However，there was no correlation between the shear strength parameters and the physical properties.Some valuable empirical formulas are obtained by fitting to provide reference and basis for parameter selection of silty soft soil in engineering design of Wuchang area.

Key words: Wuchang area, silty soft soil, parameters index, correlation analysis

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