不同固化材料垫层在黄土中隔水能力及其垂直扩散特性

谌文武; 王圣麟; 李晓媛; 杜昱民; 杨光

doi:10.13544/j.cnki.jeg.2014.05.01

不同固化材料垫层在黄土中隔水能力及其垂直扩散特性

doi: 10.13544/j.cnki.jeg.2014.05.01

兰州大学西部灾害与环境力学教育部重点实验室兰州 730000

基金项目:

国家重点基础研究发展计划（973）项目（2014CB744700）资助

详细信息

作者简介:
谌文武（1966- ），男，博士，教授，博士生导师，主要从事地质工程、岩土工程及文物保护方面的科研和教学工作. Email：sungp@lzu.edu.cn

中图分类号: TU444
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出版历程
- 收稿日期: 2014-06-03
- 修回日期: 2014-08-04
- 刊出日期: 2014-10-25

WATER PROOF CAPABILITY AND DIFFUSION CHARACTERISTICS OF DIFFERENT STRENGTHENING MATERIALS IN LOESS IN VERTICAL DIRECTION

Key Laboratory of Mechanics on Western Disaster and Environment Mechanics, Lanzhou University, Lanzhou 730000

摘要

摘要: 黄土作为地基材料时由于其湿陷性容易出现失稳现象，利用固化剂垫层改良黄土地基水稳性和强度的技术被广泛使用。本文主要通过在黄土中分别加入石灰、水泥和粉煤灰固化剂垫层的方法进行加固，测定了在垂直方向上各处的含水率、密度、干密度、土颗粒比表面积(SSA)及阳离子交换能力(CEC)的变化。试验表明石灰、水泥和粉煤灰垫层可以影响10～15cm范围内相邻土层含水率、密度、比表面积和阳离子交换能力，改变土质结构，提高土体的水稳性。改性后的土体越靠近固化剂垫层，含水率、SSA和CEC越小而密度越大。其中，石灰垫层效果最好，它能将黄土中含水率减小超过4%，密度增加1.0～1.5g cm-3，粉煤灰作用次之，水泥最弱。此外，试样土颗粒比表面积(SSA)与阳离子交换能力(CEC)存在线性递增的关系，本次试验中，3个试样中SSA与CEC之比均稳定于6.5～7.5之间。
- 石灰 /
- 水泥 /
- 粉煤灰 /
- 隔水能力 /
- 垂直扩散
Abstract: Loess has the collapsibility characteristic. Loess can have the phenomenon of unstability when it is used as foundation materials. The technique of using strengthening materials cushion to improve water stability and strength of loess foundations has been widely applied. In this test, cushions made of lime, fly ash and cement are added into loess separately. The moisture content, density, dry density, Specific Surface Area(SSA) and Cation Exchange Capacity(CEC) of the loess at different places in vertical direction are measured. Results indicate that the lime, fly ash and cement cushion all have considerable impact on the moisture content, density, SSA and CEC of adjacent loess(10～15cm),changing the microstructure and enhance the water stability of the loess. The closer to the cushion, the smaller the moisture content, SSA and CEC are and the greater the density is Lime cushion has the best effect. It can reduce over 4% of the moisture content, increase 1.0～1.5g cm-3 of the loess density. Effects of fly ash are weaker and cement the weakest. Additionally, the SSA and CEC have a linear increment relationship. In the present test, the rate between SSA and CEC of the three tests is controlled between 6.5～7.5.
- Lime /
- Cement /
- Fly ash /
- Water proof capability /
- Vertical diffusion

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参考文献(1)

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文章访问数: 2807
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不同固化材料垫层在黄土中隔水能力及其垂直扩散特性

doi: 10.13544/j.cnki.jeg.2014.05.01

作者简介:
谌文武（1966- ），男，博士，教授，博士生导师，主要从事地质工程、岩土工程及文物保护方面的科研和教学工作. Email：sungp@lzu.edu.cn

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WATER PROOF CAPABILITY AND DIFFUSION CHARACTERISTICS OF DIFFERENT STRENGTHENING MATERIALS IN LOESS IN VERTICAL DIRECTION

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不同固化材料垫层在黄土中隔水能力及其垂直扩散特性

doi: 10.13544/j.cnki.jeg.2014.05.01

作者简介: 谌文武（1966- ），男，博士，教授，博士生导师，主要从事地质工程、岩土工程及文物保护方面的科研和教学工作. Email：sungp@lzu.edu.cn

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出版历程

WATER PROOF CAPABILITY AND DIFFUSION CHARACTERISTICS OF DIFFERENT STRENGTHENING MATERIALS IN LOESS IN VERTICAL DIRECTION

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出版历程

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期刊介绍

联系我们

作者简介:
谌文武（1966- ），男，博士，教授，博士生导师，主要从事地质工程、岩土工程及文物保护方面的科研和教学工作. Email：sungp@lzu.edu.cn