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DOI	10.1016/j.jenvman.2021.113106
	Mitigation of sand liquefaction under static loading condition using biogas bubbles generated by denitrifying bacteria
	Peng, Erxing; Sheng, Yu; Hu, Xiaoying; Zhang, Dingwen; Hou, Zheng
通讯作者	Peng, EX (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2021
ISSN	0301-4797
EISSN	1095-8630
卷号	295
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.
关键词	STABILIZED SILTY SOIL DYNAMIC COMPACTION SATURATION INSTABILITY RESISTANCE EARTHQUAKE SYSTEM COLUMN FLOW
英文关键词	Biogas bubbles; Desaturation; Liquefaction; Triaxial tests
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000680023400001
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
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/254027
作者单位	[Peng, Erxing; Sheng, Yu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Hu, Xiaoying; Hou, Zheng] Lanzhou Univ Technol, Sch Civil Engn, 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. Mitigation of sand liquefaction under static loading condition using biogas bubbles generated by denitrifying bacteria[J]. 中国科学院西北生态环境资源研究院,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).