气候变化领域集成服务门户(CCPortal): Undrained Responses of Partially Saturated Sand Induced by Biogas under Dynamic Cyclic Loading

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DOI	10.1520/JTE20190841
	Undrained Responses of Partially Saturated Sand Induced by Biogas under Dynamic Cyclic Loading
	Peng, Erxing; Sheng, Yu; Hu, Xiaoying; Zhang, Dingwen
通讯作者	Peng, EX (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Donggang W Rd 320, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2021
ISSN	0090-3973
EISSN	1945-7553
起始页码	15
结束页码	27
卷号	49 期号:1
英文摘要	Desaturation denotes a methodology used to mitigate sand liquefaction. Signifying a new form of material, biogas is deemed more feasible for the purpose of desaturation. The present study entailed the adoption of a microbial denitrification process for generating nitrogen gas to induce specimens that are partially saturated. These specimens were utilized for the consolidated undrained triaxial tests performed isotropically. Based on a simplified process concerning the evaluation of liquefaction, the study provided the crucial degree of saturation for determining its minimum degree for averting liquefaction under varying intensities of earthquake. According to test findings, the soils' liquification resistance grows with an increase in the saturation degree. The number of loading cycles used for initializing liquefaction increases to 34 cycles from 18 cycles under undrained asymmetricity as the extent of saturation reduces to 95.9 % from 100 % when the similarity of stress ratio is observed. Furthermore, the ratio of liquification resistance goes up in a linear pattern initially as the degree of saturation decreases. Meanwhile the ratio declines as the relationship becomes increasingly nonlinear. As a result, there is a gradual reduction in liquefaction resistance as the magnitude of earthquake rises, with a decline in the critical saturation degree. Notably, the extent of this decline is predicated on the relative density.
关键词	LIQUEFACTION RESPONSE EARTHQUAKE MITIGATION CARBONATE STRENGTH MODEL
英文关键词	liquefaction; biogas; desaturation; triaxial tests
语种	英语
WOS研究方向	Materials Science
WOS类目	Materials Science, Characterization & Testing
WOS记录号	WOS:000599154100002
来源期刊	JOURNAL OF TESTING AND EVALUATION
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254473
作者单位	[Peng, Erxing; Sheng, Yu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Donggang W Rd 320, Lanzhou 730000, Gansu, Peoples R China; [Hu, Xiaoying] Lanzhou Univ Technol, Sch Civil Egineering, 36 Pengjiaping Rd, Lanzhou 730050, Gansu, Peoples R China; [Zhang, Dingwen] Southeast Univ, Sch Transportat, Nanjing 210096, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Peng, Erxing,Sheng, Yu,Hu, Xiaoying,et al. Undrained Responses of Partially Saturated Sand Induced by Biogas under Dynamic Cyclic Loading[J]. 中国科学院西北生态环境资源研究院,2021,49(1).
APA	Peng, Erxing,Sheng, Yu,Hu, Xiaoying,&Zhang, Dingwen.(2021).Undrained Responses of Partially Saturated Sand Induced by Biogas under Dynamic Cyclic Loading.JOURNAL OF TESTING AND EVALUATION,49(1).
MLA	Peng, Erxing,et al."Undrained Responses of Partially Saturated Sand Induced by Biogas under Dynamic Cyclic Loading".JOURNAL OF TESTING AND EVALUATION 49.1(2021).