Static Soaking Test on Impact of Simulated Acid Rain on Shear Properties of Red Clay

Qian Chunhua

doi:10.13961/j.cnki.stbctb.2024.05.002

您当前的位置：

首页 >

文章列表页 >

Static Soaking Test on Impact of Simulated Acid Rain on Shear Properties of Red Clay

- Static Soaking Test on Impact of Simulated Acid Rain on Shear Properties of Red Clay
- Bulletin of Soiland Water Conservation Vol. 44, Issue 5, Pages: 10-18(2024)
- 作者机构：
  
  国家林业局昆明勘察设计院,云南,昆明,650000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2024.05.002
  CLC： U416.1
- Published：2024
- 稿件说明：
移动端阅览
Qian Chunhua. Static Soaking Test on Impact of Simulated Acid Rain on Shear Properties of Red Clay[J]. Bulletin of Soiland Water Conservation, 2024, 44(5): 10-18.
DOI：

Qian Chunhua. Static Soaking Test on Impact of Simulated Acid Rain on Shear Properties of Red Clay[J]. Bulletin of Soiland Water Conservation, 2024, 44(5): 10-18. DOI： 10.13961/j.cnki.stbctb.2024.05.002.

摘要

[目的] 模拟酸雨对红黏土抗剪强度特征的影响，并结合酸雨侵蚀后红黏土的微结构

分析影响强度机理

为酸雨区的基础设施建设特别是路基边坡防护和保障基础设施安全运营提供理论和工程指导。[方法] 以云南省昆明市某路基边坡红黏土为研究对象，采用静态浸泡试验，用纯水和配置不同浓度的酸液对红黏土进行7，14和28 d的浸泡和侵蚀，然后采用直剪试验对红黏土的抗剪强度进行测定，同时采用电镜扫描和能谱分析对侵蚀以后土样的微观结构进行解析以此来开展侵蚀机理研究。[结果] ① 酸液对红黏土应力应变特征影响是明显的，特别是在高浓度酸液的侵蚀下，应力应变曲线变得不稳定，呈台阶上升状，具有应变硬化特征。② 受酸液的侵蚀影响，红黏土的抗剪强度最高降低率可达到70%(7 d)和80%(14 d)，在pH值为0的高浓度酸液侵蚀28 d以后，抗剪强度仅有5 kPa左右，强度基本完全损失；同时在高浓度酸液侵蚀下，不论侵蚀多长时间，黏聚力都最低，仅为4.99，2.19，0.02 kPa。随着浸泡时间和酸液浓度的增加，红黏土的抗剪强度指标黏聚力和内摩擦角均逐渐降低，且酸液浓度对强度及其指标的影响更为显著。③ 酸液导致倍半氧化物减少，粒间黏结性和黏结力降低，内部孔隙增大结构疏松，含水率增大是红黏土抗剪强度和黏聚力降低的原因，而酸液使粒径整体减小是内摩擦角降低的主要原因。[结论] 酸雨对红黏土路基边坡红黏土强度影响明显，酸雨浓度比降雨时长对强度影响更为显著，在路基边坡稳定性的预测与防治及保障公路基础设施安全运营时应予以重视。

Abstract

[Objective] The effect of simulated acid rain on the shear strength characteristics of red clay was investigated and the influence strength mechanism and microstructure of red clay after acid rain corrosion was analyzed in order to provide theoretical and engineering guidance for the construction of infrastructure in acid rain area

especially the protection of roadbed slope and safe operation of infrastructure. [Methods] The red clay of a roadbed slope in Kunming City

Yunnan Province was used as the research object. The study adopted the static soaking test and used pure water and acid liquor with different concentrations to soak and erode the red clay for 7

and 28 days. Thereafter

the shear strength of the red clay was measured using the direct shear tests

and the microstructures of the eroded soil samples were analyzed via electron microscope scanning and energy spectrum analysis to analyze the influence mechanism of strength. [Results] ① The effect of acid liquor on the stress-strain characteristics of red clay is significant

especially under high concentration acid. The stress-strain curve was unstable and increased like a step

with strain hardening characteristics. ② With the increase in soaking time and acid concentration

the shear strength of red clay and its index of cohesion and internal friction angle gradually decreased

and the acid concentration had a more significant effect on the strength and its index. ③ Acid liquor decreased the sequioxide and the interparticle adhesion and bonding force and simultaneously increased the internal pores

loosened the structure

and increased the soil moisture content

thereby resulting in a decrease in shear strength and cohesion; however

the overall decrease in particle size caused by acid was the main reason for the decrease in the internal friction angle. [Conclusion] Acid rain has a significant effect on the strength of red clay from roadbed slope

and the intensity of acid rain has a more significant effect on the strength than the duration of rainfall. Attention should be paid to the prediction and prevention of roadbed slope stability and the safe operation of highway infrastructure.

关键词

Keywords

references

徐丽霞,向峰,邱飞,等.2016—2020年云南省主要城市酸雨污染特征及趋势分析[J].灾害学,2022,37(1):96-101. Xu Lixia, Xiang Feng, Qiu Fei, et al. The characteristics and trend of acid rain pollution in the major cities in Yunnan Province from 2016 to 2020[J]. Journal of Catastrophology, 2022,37(1):96-101.

Luan Haiyang, Fan Yingfang, Chen An, et al. Exploratory experimental study on flexural behavior of CFRP-reinforced concrete beams subjected to acidic loading effect [J]. Advances in Structural Engineering, 2018,21(14):2184-2197.

Fan Yingfang, Hu Zhiqiang, Luan Haiyang, et al. A study of deterioration of reinforced concrete beams under various forms of simulated acid rain attack in the laboratory [J]. Structural Engineering and Mechanics, 2014,52(1):35-49.

刘昊.模拟酸雨对12种常绿阔叶树幼苗叶绿素荧光特性的影响[D].浙江杭州:浙江林学院,2008. Liu Hao. Effects of simulated acid rain on chlorophyll fluorescence characteristics of 12 species of evergreen broad-leaved seedlings[D]. Hangzhou, Zhejiang: Zhejiang Forestry University, 2008.

任青阳,靳红华,肖宋强,等.模拟酸雨侵蚀环境下钢筋混凝土结构长期性能研究综述[J].交通运输工程学报,2022,22(5):41-72. Ren Qingyang, Jin Honghua, Xiao Songqiang, et al. Review on long-term performance of reinforced concrete structures under simulated acid rain erosion environments [J]. Journal of Traffic and Transportation Engineering, 2022,22(5):41-72.

袁晓露,李北星,祝文凯,等.酸雨对混凝土表层结构的侵蚀机理[J].材料导报,2022,36(22):221-226. Yuan Xiaolu, Li Beixing, Zhu Wenkai, et al. Corrosion mechanism of acid rain on surface structure of concrete [J]. Materials Reports, 2022,36(22):221-226.

Yin Yushi, Zhang Jun, Zhang Guanhua. Experimental study on reinforced concrete small-eccentricity compressive column after acid rain corrosion [J]. Construction and Building Materials, 2023,364:130002.

Xu Kaicheng, Huang Lingjuan, Zhang Liqing, et al. Experimental study on the seismic performance of prestressed concrete beams under low-cycle reciprocating load and simulated acid rain corrosion environment[J]. Construction and Building Materials, 2023,408:133629.

张浚枫.酸雨蚀变下云南红土的宏微观特性及机理研究[D].云南昆明:昆明理工大学,2017. Zhang Xunfeng .Study on macro and micro characteristics and mechanism of Yunnan laterite altered by acid rain [D]. Kunming, Yunnan: Kunming University of Science and Technology, 2017.

张星鹏.酸雨作用下花岗岩残积土力学响应规律研究[D].湖北武汉:华中科技大学,2021. Zhang Xingpeng. Study on mechanical response of granite residual soil under acid rain [D]. Wuhan, Hubei: Huazhong University of Science and Technology, 2021.

何玉芹,许宏斌.云南省酸雨控制区二氧化硫污染现状及综合防治措施[J].云南环境科学,2004,23(S1):140-142. He Yuqin, Xu Hongbin. Current situation and comprehensive prevention-treatment measures for SO

pollution in acid rain control zone, Yunnan Province [J]. Environmental Science Survey, 2004,23(S1):140-142.

覃绮平.土基回弹模量影响因素及其相关关系研究[D].陕西西安:长安大学,2005. Qin Qiping. Study on Influencing factors and Correlation of soil foundation resilience modulus [D]. Xi’an, Shaanxi: Chang’an University, 2005.

陈智锋,李辉,蒋宁山,等.冻融时间和含水率对紫穗槐加筋黄土抗剪强度的影响[J].水土保持通报,2023,43(2):43-49. Chen Zhifeng, Li Hui, Jiang Ningshan, et al. Effects of freeze-thaw time and moisture content on shear strength of loess reinforced with

Sophora japonica

roots [J]. Bulletin of Soil and Water Conservation, 2023,43(2):43-49.

李涛,吕春娟,姜成刚,等.含水率和聚丙烯酰胺分子量对重构铁尾矿砂抗剪强度的影响[J].水土保持通报,2022,42(2):89-97. Li Tao, Lyu Chunjuan, Jiang Chenggang, et al. Effects of water content and polyacrylamide molecular weight on shear strength of reconstructed iron tailing sand [J]. Bulletin of Soil and Water Conservation, 2022,42(2):89-97.

海龙,谭世林,徐博.紫花苜蓿和通奶草根土复合体的力学特性[J].水土保持通报,2023,43(6):57-64. Hai Long, Tan Shilin, Xu Bo. Mechanical properties of

Medicago sativa

and

Euphorbia hypericifolia

root-soil complex [J]. Bulletin of Soil and Water Conservation, 2023,43(6):57-64.

Mahdikhani M, Bamshad O, Fallah Shirvani M. Mechanical properties and durability of concrete specimens containing nano silica in sulfuric acid rain condition [J]. Construction and Building Materials, 2018,167:929-935.

中华人民共和国水利部.GB/T50123-2019土工试验方法标准[S].北京：中国计划出版社,2019. Ministry of Water Resources of the People’s Republic of China. GB/T50123-2019 Standard for geotechnical testing method [S]. Beijing: China Planning Press, 2019.

孙重初.酸液对红黏土物理力学性质的影响[J].岩土工程学报,1989,11(4):89-93. Sun Zhongchu. Effect of acid solution on physical and mechanical properties of red clay [J]. Chinese Journal of Geotechnical Engineering, 1989,11(4):89-93.

贺蕊,苏怀,李岫峰,等.滇东高原红壤酸处理后粒度增粗现象及原因探究[J].土壤,2018,50(2):428-433. He Rui, Su Huai, Li Xiufeng, et al. Phenomenon and reason of grain size increasing after adding HCl in red soil in eastern Yunnan Plateau [J]. Soils, 2018,50(2):428-433.

伯桐震,黄英,石崇喜,等.酸污染红土物理性质的变化特征[J].水文地质工程地质,2012,39(2):111-115. Bo Tongzhen, Huang Ying, Shi Chongxi, et al. Variation characteristics of physical properties of acid pollution laterite [J]. Hydrogeology & Engineering Geology, 2012,39(2):111-115.

潘泰,赵贵涛,黄英.pH值对云南红黏土力学特性及微观结构的影响[J].硅酸盐通报,2021,40(10):3427-3434. Pan Tai, Zhao Guitao, Huang Ying. Effect of pH value on mechanical properties and microstructure of Yunnan laterite [J]. Bulletin of the Chinese Ceramic Society, 2021,40(10):3427-3434.

肖桂元.酸雨作用下桂林红黏土损伤规律研究[D].湖北武汉:中国地质大学,2021. Xiao Guiyuan. Study on strength attenuation law of red clay subgrade under the action of acid rain [D]. Wuhan, Hube: China University of Geosciences, 2021.

牟春梅,付青,刘奕畅.桂林地区酸污染红黏土力学效应弱化试验[J].河南科技大学学报(自然科学版),2019,40(4):52-57. Mu Chunmei, Fu Qing, Liu Yichang. Experimental of mechanical effect weakening of acid-contaminated red clay in Guilin [J]. Journal of Henan University of Science and Technology (Natural Science), 2019,40(4):52-57.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Soil Strengthening and Slope Protection Effect of Two Types of Herbaceous Plants on Red Clay Slopes

Mechanics Research on Vetiver Grass in Railway Side Slope Protection

Effect of Soil Reinforcement by Ostryopsis Davidiana Decaisne Root System

Shear Strength Characteristics of Root—Soil Composites Under Bearing Pressure Condition of Soil Pore Water

Effects of Root Layout and Diameter on Shear Performance in Root-Soil Composite

Related Author

Wang Lianrui

Yan Ya

Shang Chongju

TanJuan

Yang Yongyu

ZHANG Dongliang

WANG Binglong

ZHOU Jianqin

Related Institution

Guizhou Institute of Water Resources Science

Guizhou Institute of Petroleum Exploration and Development Engineering

Key Laboratory for Highway and Traffic Engineering of Ministry of Education, Tongji University

College of Grassland and Environment Science, Xinjiang Agricultural University

College of Soil and Water Conservation, Beijing Forestry University

⁰