Evolution of the characteristic parameters of acoustic emission from deformation to failure of a loose soil slope
Loose accumulations are widely present in nature and industrial production, possessing complex mechanical properties and relatively high risks of instability. To investigate their sliding instability process during slope deformation, this study explores the evolution of acoustic characteristics thro...
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| Format: | Article |
| Language: | zho |
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Editorial Office of The Chinese Journal of Geological Hazard and Control
2024-10-01
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| Series: | Zhongguo dizhi zaihai yu fangzhi xuebao |
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| Online Access: | https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202312041 |
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| author | Longcan LI Xin WU Yonghong LIU Ying HAI Man ZHANG Longmei ZHANG Chengjia HUANG |
| author_facet | Longcan LI Xin WU Yonghong LIU Ying HAI Man ZHANG Longmei ZHANG Chengjia HUANG |
| author_sort | Longcan LI |
| collection | DOAJ |
| description | Loose accumulations are widely present in nature and industrial production, possessing complex mechanical properties and relatively high risks of instability. To investigate their sliding instability process during slope deformation, this study explores the evolution of acoustic characteristics throughout the entire process of loose accumulations, from static state, creep to sliding, based on acoustic emission (AE) technology. The AE characteristic parameters of loose accumulations during the sliding process are analyzed, and the AE evolution stages are divided based on the state changes of loose accumulations. Finally, the AE evolution law of the sliding process of loose accumulations is further verified through particle image velocimetry (PIV) analysis and spectral changes. The results indicate that the ringing count and energy gradually increase with the sliding process, while the b-value gradually decreases. The sliding threshold values for the b-value, ringing count, and energy are 0.2, 5000 counts, and 1500 mV·ms, respectively, with the b-value being more sensitive to state changes in loose accumulations. The spectral centroid experiences a decrease of 30～50 kHz in the early pre-sliding stage, followed by oscillatory changes. The time period of these oscillations corresponds to relatively high ringing count and energy values and relatively low b-values. Furthermore, there is an important “window period” before the sliding of loose accumulations, indicating that AE technology has the potential to identify precursors of loose accumulation landslides. |
| format | Article |
| id | doaj-art-81f778bcf0ce49b7b4a307c6f9646197 |
| institution | DOAJ |
| issn | 1003-8035 |
| language | zho |
| publishDate | 2024-10-01 |
| publisher | Editorial Office of The Chinese Journal of Geological Hazard and Control |
| record_format | Article |
| series | Zhongguo dizhi zaihai yu fangzhi xuebao |
| spelling | doaj-art-81f778bcf0ce49b7b4a307c6f96461972025-08-20T03:22:19ZzhoEditorial Office of The Chinese Journal of Geological Hazard and ControlZhongguo dizhi zaihai yu fangzhi xuebao1003-80352024-10-0135515115910.16031/j.cnki.issn.1003-8035.202312041202312041Evolution of the characteristic parameters of acoustic emission from deformation to failure of a loose soil slopeLongcan LI0Xin WU1Yonghong LIU2Ying HAI3Man ZHANG4Longmei ZHANG5Chengjia HUANG6College of Engineering, Sichuan Normal University, Chengdu, Sichuan 610101, ChinaCollege of Engineering, Sichuan Normal University, Chengdu, Sichuan 610101, ChinaCollege of Engineering, Sichuan Normal University, Chengdu, Sichuan 610101, ChinaCollege of Engineering, Sichuan Normal University, Chengdu, Sichuan 610101, ChinaCollege of Engineering, Sichuan Normal University, Chengdu, Sichuan 610101, ChinaCollege of Engineering, Sichuan Normal University, Chengdu, Sichuan 610101, ChinaCollege of Engineering, Sichuan Normal University, Chengdu, Sichuan 610101, ChinaLoose accumulations are widely present in nature and industrial production, possessing complex mechanical properties and relatively high risks of instability. To investigate their sliding instability process during slope deformation, this study explores the evolution of acoustic characteristics throughout the entire process of loose accumulations, from static state, creep to sliding, based on acoustic emission (AE) technology. The AE characteristic parameters of loose accumulations during the sliding process are analyzed, and the AE evolution stages are divided based on the state changes of loose accumulations. Finally, the AE evolution law of the sliding process of loose accumulations is further verified through particle image velocimetry (PIV) analysis and spectral changes. The results indicate that the ringing count and energy gradually increase with the sliding process, while the b-value gradually decreases. The sliding threshold values for the b-value, ringing count, and energy are 0.2, 5000 counts, and 1500 mV·ms, respectively, with the b-value being more sensitive to state changes in loose accumulations. The spectral centroid experiences a decrease of 30～50 kHz in the early pre-sliding stage, followed by oscillatory changes. The time period of these oscillations corresponds to relatively high ringing count and energy values and relatively low b-values. Furthermore, there is an important “window period” before the sliding of loose accumulations, indicating that AE technology has the potential to identify precursors of loose accumulation landslides.https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202312041acoustic emissionloose accumulationslandslide monitoringslip processespiv |
| spellingShingle | Longcan LI Xin WU Yonghong LIU Ying HAI Man ZHANG Longmei ZHANG Chengjia HUANG Evolution of the characteristic parameters of acoustic emission from deformation to failure of a loose soil slope Zhongguo dizhi zaihai yu fangzhi xuebao acoustic emission loose accumulations landslide monitoring slip processes piv |
| title | Evolution of the characteristic parameters of acoustic emission from deformation to failure of a loose soil slope |
| title_full | Evolution of the characteristic parameters of acoustic emission from deformation to failure of a loose soil slope |
| title_fullStr | Evolution of the characteristic parameters of acoustic emission from deformation to failure of a loose soil slope |
| title_full_unstemmed | Evolution of the characteristic parameters of acoustic emission from deformation to failure of a loose soil slope |
| title_short | Evolution of the characteristic parameters of acoustic emission from deformation to failure of a loose soil slope |
| title_sort | evolution of the characteristic parameters of acoustic emission from deformation to failure of a loose soil slope |
| topic | acoustic emission loose accumulations landslide monitoring slip processes piv |
| url | https://www.zgdzzhyfzxb.com/en/article/doi/10.16031/j.cnki.issn.1003-8035.202312041 |
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