基于黄土物理化学性质变化的固化土强度影响因素分析

›› 2011, Vol. 32 ›› Issue (7): 1996-2000.

基于黄土物理化学性质变化的固化土强度影响因素分析

樊恒辉^{1, 2}，高建恩^{1, 2}，吴普特^{1, 2}，娄宗科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. 中国科学院教育部水土保持与生态环境研究中心，陕西杨凌 712100

收稿日期:2009-11-20 出版日期:2011-07-10 发布日期:2011-06-30
作者简介:樊恒辉，男，1973年生，博士，副研究员，主要从事特殊性土的工程性质及改良技术研究
基金资助:
“十一五”国家科技支撑计划（No. 2006BAD11B03，No. 2006BAD09B01）；国家自然科学基金（No. 50979094）；西北农林科技大学青年学术骨干项目

Analysis of influence factors for solidified soil strength based on change of physicochemical properties of loess

FAN Heng-hui^{1, 2}，GAO Jian-en^1,2，WU Pu-te^1,2，LOU Zong-ke¹

1. College of Water Conservancy and Architectural Engineering , Northwest A＆F University, Yangling, Shaanxi 712100, China; 2. Research Centre of Soil and Water Conservation & Eco- environment, Chinese Academy of Sciences and Education Ministry, Yangling, Shaanxi 712100, China

Received:2009-11-20 Online:2011-07-10 Published:2011-06-30

摘要/Abstract

摘要： 基于黄河中游地区黄土自西北向东南分布变化的规律，研究黄土的物理化学性质和矿物成分对水泥基土壤固化剂固化土无侧限抗压强度的影响。试验结果表明：随着黏粒含量的增加，固化土的强度先降低后增加，其中黏粒含量17.0%是分界点；随着碱度的增加，固化土的强度增加；蒙脱石的加固效果好于伊利石，在以伊利石为主的土中，随着伊利石含量的增加，固化土的强度升高；随着阳离子交换总量的增加和交换性钠离子百分比的降低，固化土的强度增加。研究表明，黄土的物理化学性质不同是水泥基土壤固化剂土质适宜性产生的主要原因；黄河中游地区自西北向东南加固土的强度具有增大的规律性

关键词: 土壤固化剂, 黄土, 物理化学性质, 无侧限抗压强度, 土质适宜性

Abstract: Based on the rules of the loess distribution from northwest to southeast in the middle reaches of the Yellow River, the influence factors of solidified soil with the cement-based soil stabilizer were studied including physicochemical properties and minerals. The results show that with the clay content increase, the strength of solidified soil reduced and then increased of which the clay content of 17.0% is the cut-off points. The strength increased with the more alkalinity in soil. The impact of the montmorillonite is better than the illite. The strength increased as the content of the illite added in the illite soil. The strength increased as the cation exchangeable capacity added and the exchangeable sodium percent reduced. The study indicates that the main reason of soil suitability of based-cement soil stabilizer is the different physicochemical properties of soil; and the strength regularity of the solidified soil is that strength increased from northwest to southeast in the middle reaches of the Yellow River

Key words: soil stabilizer, loess, physicochemical properties, unconfined compressive strength, soil suitability

中图分类号:

TU 411

樊恒辉，高建恩，吴普特，娄宗科. 基于黄土物理化学性质变化的固化土强度影响因素分析[J]. , 2011, 32(7): 1996-2000.

FAN Heng-hui ，GAO Jian-en ，WU Pu-te ，LOU Zong-ke. Analysis of influence factors for solidified soil strength based on change of physicochemical properties of loess[J]. , 2011, 32(7): 1996-2000.

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