花岗岩红土游离氧化铁对其胶结特性影响的试验研究

汤连生; 王玉玺; 孙银磊

doi:10.13204/j.gyjzG22032005

花岗岩红土游离氧化铁对其胶结特性影响的试验研究

doi: 10.13204/j.gyjzG22032005

汤连生^1,2,3,
王玉玺^1,2,3,
孙银磊^1,2,3, ,

1. 中山大学地球科学与工程学院, 广东珠海 519082;
2. 广州理工学院建筑工程学院, 广州 510540;
3. 广东省地球动力作用与地质灾害重点实验室(中山大学), 广东珠海 519082

基金项目:

中央高校基本科研业务费专项资金资助项目(20lgpy39)。

广东省自然科学基金项目(2018B030311066,2019A1515010554)

中国博士后科学基金项目(2019M663241)

国家自然科学基金面上项目(41877228,41877229)

详细信息

作者简介:
汤连生,男,1963年出生,博士,教授,博士生导师,eestls@mail.sysu.edu.cn。

通讯作者:
孙银磊,男,1986年出生,博士(后),sunylei@mail2.sysu.edu.cn。

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- 被引次数: 0
出版历程
- 收稿日期: 2022-03-20

Test Study on Effect of Free Iron Oxide in Granite Laterite on Cementation Characteristics of Laterite

TANG Liansheng^1,2,3,
WANG Yuxi^1,2,3,
SUN Yinlei^{1,2,3
, ,}

1. School of Earth Science and Engineering, Sun Yat-Sen University, Zhuhai 519082, China;
2. School of Architectural Engineering, Guangzhou Institute of Science and Technology, Guangzhou 510540, China;
3. Guangdong Provincial Key Lab of Geodynamics and Geohazards (Sun Yat-Sen University), Zhuhai 519082, China

摘要

摘要: 花岗岩红土是华南地区广泛分布的一种区域性特殊土,游离氧化铁是影响其胶结特性的重要因素,研究游离氧化铁含量变化对土胶结强度的影响具有重要意义。以广州典型的花岗岩红土为研究对象,采用盐酸淋溶方法去除胶结物,对淋溶前后的土样分别进行直剪试验及含量分析,在此基础上探讨去胶结前后土强度的变化规律。研究表明:随着游离氧化铁含量的降低,土体的抗剪强度呈下降趋势,通过对胶结强度与游离氧化铁含量进行回归分析,其结果具有明显的二项式特征。胶结强度与含水量呈负相关性,与胶结物含量具有正相关性,以含水量和游离氧化铁含量为自变量,胶结强度为因变量,通过二元回归分析,建立的胶结强度算式,能较好地反映土胶结强度水平,具有一定应用价值。
- 花岗岩红土 /
- 游离氧化铁 /
- 胶结强度 /
- 回归分析
Abstract: Granite laterite is a regional special soil which is widely distributed in South China. The content of iron oxide is an important factor influencing the cementation characteristics of granite laterite. The study on the infulence of free iron oxide content on the cementation strength is of great significance. Taking classic granite laterite in Guangzhou as a research object, the hydrochloric acid osmotic method was used to remove iron oxide from typical granite laterite. Shear tests and content analysis of soil specimens before and after leaching were conducted. On the basis, the rule of soil strength before and after leaching was discussed. The results indicated that the shear peak strength of soil decreased with the decrease of the iron oxide content. By regression analysis of cementation strength and the free iron oxide content, the relation exhited obvious binomial characteristics. The cementation strength was negatively correlated with the water content, and had positive correlation with the cementation content. Taking the water content and free iron oxide content as independent variables and the cementation strength as dependent variable, the formula of cementation strength was established through binary regression analysis, which could better reflected the level of the comentation strength of the soil and had a certain application value.
- granite laterite /
- iron oxide /
- cementation strength /
- regression analysis

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