细粒含量对饱和砂土流动性影响的试验研究

吕丛; 王志华; 张云妹; 高洪梅

doi:10.13409/j.cnki.jdpme.2016.02.006

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细粒含量对饱和砂土流动性影响的试验研究

论文 | 更新时间：2025-12-11

- 细粒含量对饱和砂土流动性影响的试验研究
- Study on Effects of Fine Contents on Flowability of Saturated Sands
- 防灾减灾工程学报 2016年36卷第2期页码：205-212
- 作者机构：
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目（51378257）;江苏省自然科学基金项目（BK2011802）资助
- DOI：10.13409/j.cnki.jdpme.2016.02.006
  中图分类号： U441
- 纸质出版：2016
- 稿件说明：
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[1]吕丛,王志华,张云妹,高洪梅.细粒含量对饱和砂土流动性影响的试验研究[J].防灾减灾工程学报,2016,36(02):205-212.

吕丛, 王志华, 张云妹, et al. Study on Effects of Fine Contents on Flowability of Saturated Sands[J]. 2016, 36(2): 205-212.
[1]吕丛,王志华,张云妹,高洪梅.细粒含量对饱和砂土流动性影响的试验研究[J].防灾减灾工程学报,2016,36(02):205-212. DOI： 10.13409/j.cnki.jdpme.2016.02.006.

吕丛, 王志华, 张云妹, et al. Study on Effects of Fine Contents on Flowability of Saturated Sands[J]. 2016, 36(2): 205-212. DOI： 10.13409/j.cnki.jdpme.2016.02.006.

摘要

开展了不同细粒含量饱和砂土的不排水循环三轴试验

基于已有饱和砂土流动性的概念

详细分析了不同细粒含量饱和砂土应力—应变率曲线、流动性曲线以及平均流动系数—孔压比关系曲线特征。讨论了细粒含量对饱和砂土流动性影响的主要规律。结果表明:不同细粒含量饱和砂土在循环荷载下具有相似的流动性演变规律和过程;循环荷载下饱和砂土的流动性与土体的颗粒级配密切相关;试样细粒含量在0%20%时

其流动性与细粒含量关系近似呈上凸抛物线形;当细粒含量为10%时

饱和砂土对应初始流体状态的孔压比最小

"初始液化"前后的流动性水平最为显著。

Abstract

Based on the concept of the flowability of saturated sands during cyclic loadings

the effect of fine contents on the flowability of saturated sands under cyclic loading was studied through undrained cyclic triaxial experiments.Based on the test results

the main rules about the effects of fine contents on the flowability of saturated sands were analyzed from stress-strain rate hysteresis loop shape

flowability curve and average flow coefficient-pore pressure ratio curve.The experiment results indicate the development pattern and process of the flowability are similar for the saturated sands with different fine contents.The flowability of saturated sands during cyclic loadings is closely related to the grain composition of sands.For the tested saturated Nanjing Fine sands with fine contents from 0% to 20%

the relationship curves between flowability and fine contents are approximately convex parabola shape.For the saturated sand with a fine content of 10%

the pore water pressure ratio corresponding to the initial liquid state is minimal among the all tested samples.And the flowability before and after initial liquefaction are most remarkable.

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references

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