长江科学院院报 ›› 2016, Vol. 33 ›› Issue (3): 70-74.DOI: 10.11988/ckyyb.20141039

• 岩土工程 • 上一篇    下一篇

掺粉煤灰压实黄土环剪试验研究

温明星1,2, 骆亚生1, 刘紫韦1, 陈柯君1   

  1. 1.西北农林科技大学 水利与建筑工程学院,陕西 杨凌 712100;
    2.中建三局集团有限公司 西北分公司,西安 710065
  • 收稿日期:2014-12-15 出版日期:2016-03-01 发布日期:2016-03-09
  • 作者简介:温明星(1988-),男,河南商丘人,硕士研究生,研究方向为黄土力学与工程,(电话)15291681629(电子信箱)819042895@qq.com。
  • 基金资助:
    国家自然科学基金项目(51178392)

Ring Shear Test of Compacted Loess Blended with Fly Ash

WEN Ming-xing1,2, LUO Ya-sheng1, LIU Zi-wei1, CHEN Ke-jun1   

  1. 1.College of Water Resources and Architecture Engineering, Northwest A & F University, Yangling 712100, China;
    2. Northwest Branch of China Construction 3th Engineering Bureau, Xi’an 710065, China
  • Received:2014-12-15 Online:2016-03-01 Published:2016-03-09

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摘要： 为了探究掺粉煤灰压实黄土残余强度特性,采用HJ-1型环剪仪对不同含水率和不同粉煤灰掺量条件下的黄土进行试验研究。结果表明:随着粉煤灰掺量的增大,土样最大干密度近似呈线性减小,而最优含水率近似呈线性增加;平衡含水率以下,残余强度与掺灰量呈负相关,平衡含水率以上,残余强度与掺灰量呈正相关。在工程应用中,可以考虑用适量粉煤灰处理较湿土,以达到降低土体自重,同时增强残余强度的目的。

关键词: 粉煤灰, 黄土, 环剪试验, 平衡含水率, 残余强度

Abstract: In order to explore the residual strength characteristics of compacted loess blended with fly ash, and provide reference for engineering practice, we carry out experimental research on loess by using HJ-1 ring shear apparatus in the presence of different moisture contents and blending ratios of fly ash. The results showed that 1) with the increase of blending ratio of fly ash, the maximum dry density linearly decreases, whereas the optimum moisture content linearly increases; 2) if moisture content is below equilibrium moisture content, the relation between residual strength and blending ratio of fly ash shows tendency of negative correlation, otherwise, the relation shows tendency of positive correlation. In actual projects, we can treat wet soil with suitable proportions of fly ash to reduce the self weight of soil and to improve residual strength.

Key words: fly ash, loess, ring shear test, equilibrium moisture content, residual strength

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