Mitigation of sand liquefaction under static loading condition using biogas bubbles generated by denitrifying bacteria

doi:10.1016/j.jenvman.2021.113106

CORC > 兰州理工大学 > 兰州理工大学

	Mitigation of sand liquefaction under static loading condition using biogas bubbles generated by denitrifying bacteria
	Peng, Erxing 1; Sheng, Yu 1; Hu, Xiaoying 2; Zhang, Dingwen 3; Hou, Zheng 2
刊名	JOURNAL OF ENVIRONMENTAL MANAGEMENT
	2021-10-01
卷号	295
关键词	Biogas bubbles Desaturation Liquefaction Triaxial tests
ISSN号	0301-4797
DOI	10.1016/j.jenvman.2021.113106
英文摘要	Nitrogen bubbles that is generated by microbial denitrification process is a new pollution-free clean material for mitigation of sand liquefaction. The current study aims to assess sustainability as well as distribution character of biogas bubbles in sand column under the condition of hydrostatics along with its performance of mitigating sand liquefaction under static loading. A series of laboratory experiments were conducted, and test results indicate that biogas bubbles has excellent sustainability in sand pores, and after 92 weeks, an increase of saturation from 84.5 to 85.1% marking only 0.6% rise. The volume of biogas generated by bacteria increases linearly with decrease of depth. Under undrained condition, if saturation of sample decreased from 100% to around 92.4%, strain softening behavior will transfer to strain hardening, and undrained shear strength can be increased by approximately two times in both of compression and extension tests. The excess pore water pressure ratio and liquefaction potential index have significant reduction with the decrease of saturation, and the magnitude of impact on compression is comparatively bigger than the extension tests. This study validates that as a new material, biogas bubbles are very stable in soil, desaturation using nitrogen bubbles is an effective method for mitigating the liquefaction of sand under static loading conditions. Moreover, the study provides support for the desaturation mitigating static liquefaction of sand to prevent geological disasters and reveals its potential engineering practical value.
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
WOS记录号	WOS:000680023400001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148947]
专题	兰州理工大学
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; 2.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Gansu, Peoples R China; 3.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. Mitigation of sand liquefaction under static loading condition using biogas bubbles generated by denitrifying bacteria[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2021,295.
APA	Peng, Erxing,Sheng, Yu,Hu, Xiaoying,Zhang, Dingwen,&Hou, Zheng.(2021).Mitigation of sand liquefaction under static loading condition using biogas bubbles generated by denitrifying bacteria.JOURNAL OF ENVIRONMENTAL MANAGEMENT,295.
MLA	Peng, Erxing,et al."Mitigation of sand liquefaction under static loading condition using biogas bubbles generated by denitrifying bacteria".JOURNAL OF ENVIRONMENTAL MANAGEMENT 295(2021).