土工基础

›› 2017, Vol. 31 ›› Issue (3): 359-363.

• 工程实录 • 上一篇    下一篇

福州轨道交通2号线淤泥质土土性指标分析

程圆圆 1，樊秀峰 1，2，吴振祥 1，2   

  1. （1.福州大学 环境与资源学院，福州 350116；2.国土资源部丘陵山地地质灾害防治重点实验室，福州 350116）
  • 收稿日期:2016-05-03 修回日期:2016-05-19 出版日期:2017-06-25 发布日期:2017-06-26
  • 作者简介:程圆圆（1990-），女，硕士研究生，研究方向为边坡工程。
  • 基金资助:

    国家自然科学基金资助（41502266）；福建省地质灾害重点实验室开发基金资助（FJKLGH2015K004）

Statistical Analysis of Mucky Soil Indices of Fuzhou Rail Transit Line No. 2

CHENG Yuanyuan1, FAN Xiufeng1,2， WU Zhenxiang1,2   

  1. (1.College of Environment and Resources, Fuzhou University, Fuzhou 350116；
    2.Key Laboratory of Geological Hazard Prevention and Control in Hilly and Mountainous Region of Land and Resources, Fuzhou 350116)
  • Received:2016-05-03 Revised:2016-05-19 Online:2017-06-25 Published:2017-06-26

摘要： 通过对福州市轨道交通2号线上淤泥质土资料进行分析，对各物理、力学指标及其变异性和相关性进行统计研究，建立重要指标间的关系经验公式，为福州地区地下工程的参数选取提供参考。研究表明，福州淤泥质土物理力学特性表现为天然含水量高、密度小、孔隙比大、液限高、压缩性高、抗剪强度低等特点。各物理指标变异性较小，尤其在95％置信区间取值范围偏差较小，在参数分析时可作为常量考虑；而力学指标数据变异性相对较大，应该考虑其差异性。物理指标 e～w、wL～w、wL～e、ΙP～wL、ΙP～e具有很高的相关性，物理指标 ω、ρ、e 分别与力学指标 a～ES 和 c～φ 具有一定相关性。

关键词: 福州地区, 淤泥质土, 物理力学指标, 变异性, 相关性

Abstract: A statistical analysis of mucky soil properties is performed on the laboratory test result of samples from Fuzhou Rail Transit Line No. 2 Project. The variabilities and correlations among various physical and mechanical properties are examined. The correlations between the physical indices and the mechanical properties are established for the preliminary design of future preliminary design of Fuzhou underground engineering projects. The results indicate that the Fuzhou mucky soils have the following characteristics: high moisture content; low dry unit weight; high void ratio; high liquid limit, large compressibility and low shear strength. The variability of the mechanical properties are found to be large and the sample differences should be considered in the future preliminary design. High correlations are found in following parameters: void ratio and moisture content; liquid limit and moisture content; plastic limit and liquid limit; plastic limit and void ratio. Lower correlations can be identified in following parameters: physical properties of moisture content, natural unit weight, void are correlated with mechanical properties: compressibility, compression modulus, shear strength parameters of cohesion and internal friction angle.

Key words: Fuzhou Area, Mucky Soils, Physical and Mechanical Indexes, Variability, Correlation