岩土工程学报2017，Vol.39Issue(12)：2320-2326,7.DOI:10.11779/CJGE201712022
酸碱环境干湿循环作用下砂岩抗剪强度劣化规律研究
Deterioration rules of shear strength in sandstones under wetting and drying cycles in acid and alkali environment
摘要
Abstract
In order to study the deterioration rules of shear strength in sandstones under wetting and drying cycles, sandstone specimens are tested after 1, 3, 6, 10 wetting and drying cycles in the environment of pH=7, 9, 4. Through UCS and TCS after different cycles, the cohesion and internal friction angle of sandstone are calculated, and the relation formulae between them and number of cycles N are determined, respectively, thus the shear strength is obtained under wetting and drying cycles in acid and alkali environment. The results show that the shear strength of sandstone decreases with the increase of cycles. In the early stage of cycles, the deterioration effect is comparatively significant, and the deterioration of shear strength is very large, then, the strength deterioration is relatively small. In the acidic environment, the deterioration of shear strength in sandstones is the most serious, slightly reduced in the alkaline environment, and the neutral condition is the lightest. The deterioration of shear strength in dried samples is much lower than that of wet samples.关键词
干湿循环/酸碱环境/砂岩/抗剪强度/劣化Key words
wetting and drying cycle/acid and alkali environment/sandstone/shear strength/deterioration分类
建筑与水利引用本文复制引用
刘新荣,袁文,傅晏,王子娟,朱乐文,谢应坤..酸碱环境干湿循环作用下砂岩抗剪强度劣化规律研究[J].岩土工程学报,2017,39(12):2320-2326,7.基金项目
国家自然科学青年基金项目(51308567) （51308567）
