长江科学院院报 ›› 2017, Vol. 34 ›› Issue (1): 114-119.DOI: 10.11988/ckyyb.20150898

• 岩土工程 • 上一篇    下一篇

河道淤泥气泡混合土细观破坏机理模拟分析

陈晨1, 顾欢达1, 陈冬青2   

  1. 1.苏州科技大学 土木工程学院,江苏 苏州 215011;
    2.苏州市恒正工程质量检测有限公司,江苏 苏州 215134
  • 收稿日期:2015-10-26 出版日期:2017-01-01 发布日期:2017-01-13
  • 通讯作者: 顾欢达(1958-),男,江苏无锡人,教授,博士,主要从事软土地基处理技术及原理分析方面的研究,(电话)0512-68786743(电子信箱)ghdgx@163.com。
  • 作者简介:陈 晨(1990-),女,江苏启东人,硕士,主要从事软土地基处理及应用,(电话)15262407976(电子信箱)693453756@qq.com。
  • 基金资助:
    国家自然科学基金项目(51378327)

Simulation Analysis on Mesoscopic Failure Mechanism of Foamed Mixture Lightweight Soil Using River Sludge

CHEN Chen1, GU Huan-da1, CHEN Dong-qing2   

  1. 1.Department of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215011,China;
    2.Suzhou Hengzheng Engineering Quality Test Co. Ltd., Suzhou 215134,China
  • Received:2015-10-26 Online:2017-01-01 Published:2017-01-13

摘要: 河道淤泥气泡混合土是由固体土体和微孔组成非均质复合材料,微孔结构形状及分布特征是影响气泡混合土力学性质的主要因素。基于河道淤泥气泡混合土内部微孔分布的细观特征,利用物理力学及数值模拟试验方法,对河道淤泥气泡混合土的力学性质与微孔细观特征的相关性进行分析,以揭示河道淤泥气泡混合土的强度发挥及破坏机理。根据模拟计算及试验实测得到:大孔径微孔及微孔孔径分布的均匀性是影响气泡混合土力学性质的重要因素;其次,河道淤泥气泡混合土中的气泡掺入量、水泥掺入量也是影响河道淤泥气泡混合土力学性质的主要因素。

关键词: 气泡混合土, 图像处理技术, 有限元分析, 塑性区, 应力分布

Abstract: Foamed mixture lightweight soil using river sludge (FMLSS) is an inhomogeneous composite material composed of solid soil and micropores. The structural shape and distribution of micropores are main factors influencing the mechanical properties of FMLSS. In this article, the correlation between FMLSS’s mechanical properties and micropore’s mesoscopic characteristic is studied to reveal the strength and failure mechanism of FMLSS by means of physical mechanical tests and numerical simulation. According to the simulation and test measurement, large diameter micropore and the uniformity of diameter distribution are important factors that affect FMLSS’s mechanical properties; secondly, the air foam content and cement content in FMLSS are also main factors that affect FMLSS’s mechanical properties.

Key words: foamed mixture lightweight soil using river sludge, image processing techniques, finite element analysis, plastic zone, stress distribution

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