Yang Xiao, Bingyang Wu, Xiang Jiang, Wenjun Fan, Hao Cui
{"title":"生物刺激土壤中的雪崩和失败","authors":"Yang Xiao, Bingyang Wu, Xiang Jiang, Wenjun Fan, Hao Cui","doi":"10.1007/s11440-024-02500-y","DOIUrl":null,"url":null,"abstract":"<div><p>Bio-stimulation is a popular method to improve the engineering properties of soils because it treats the soils by using native bacteria which is environmentally friendly. However, the failure mechanism of bio-stimulated soils has not been studied. In this work, we apply avalanche dynamics which has been used in the investigation of bio-augmented sands to analyze the avalanche characteristics and failure mechanisms of bio-stimulated soils. We find the average relative magnitude, waiting time distribution and aftershock distribution are independent of the degree of cementation when the calcium carbonate precipitation content ranges from 14% to 27%. Additionally, the exponents in the mean-field thory indicate the failure of bio-stimulated soils is not brittle. Furthermore, we find the failure mechanism of bio-stimulated soils is a mixture of fracture and intergranular movement. During the failure process of bio-stimulated soils, the fracture behavior becomes more obvious with an increase in degree of cementation. At the pre-peak stage, the proportion of intergranular movement gradually increases in the mixture of fracture and intergranular movement with the loading process. The main failure mechanism at the whole stage and post-peak stage is intergranular movement. The findings may contribute to the further investigation of the mechanical behavior exhibited by bio-stimulated soils.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 4","pages":"1911 - 1920"},"PeriodicalIF":5.6000,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Avalanches and failures in bio-stimulated soils\",\"authors\":\"Yang Xiao, Bingyang Wu, Xiang Jiang, Wenjun Fan, Hao Cui\",\"doi\":\"10.1007/s11440-024-02500-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Bio-stimulation is a popular method to improve the engineering properties of soils because it treats the soils by using native bacteria which is environmentally friendly. However, the failure mechanism of bio-stimulated soils has not been studied. In this work, we apply avalanche dynamics which has been used in the investigation of bio-augmented sands to analyze the avalanche characteristics and failure mechanisms of bio-stimulated soils. We find the average relative magnitude, waiting time distribution and aftershock distribution are independent of the degree of cementation when the calcium carbonate precipitation content ranges from 14% to 27%. Additionally, the exponents in the mean-field thory indicate the failure of bio-stimulated soils is not brittle. Furthermore, we find the failure mechanism of bio-stimulated soils is a mixture of fracture and intergranular movement. During the failure process of bio-stimulated soils, the fracture behavior becomes more obvious with an increase in degree of cementation. At the pre-peak stage, the proportion of intergranular movement gradually increases in the mixture of fracture and intergranular movement with the loading process. The main failure mechanism at the whole stage and post-peak stage is intergranular movement. The findings may contribute to the further investigation of the mechanical behavior exhibited by bio-stimulated soils.</p></div>\",\"PeriodicalId\":49308,\"journal\":{\"name\":\"Acta Geotechnica\",\"volume\":\"20 4\",\"pages\":\"1911 - 1920\"},\"PeriodicalIF\":5.6000,\"publicationDate\":\"2024-12-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Geotechnica\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11440-024-02500-y\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, GEOLOGICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Geotechnica","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11440-024-02500-y","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
Bio-stimulation is a popular method to improve the engineering properties of soils because it treats the soils by using native bacteria which is environmentally friendly. However, the failure mechanism of bio-stimulated soils has not been studied. In this work, we apply avalanche dynamics which has been used in the investigation of bio-augmented sands to analyze the avalanche characteristics and failure mechanisms of bio-stimulated soils. We find the average relative magnitude, waiting time distribution and aftershock distribution are independent of the degree of cementation when the calcium carbonate precipitation content ranges from 14% to 27%. Additionally, the exponents in the mean-field thory indicate the failure of bio-stimulated soils is not brittle. Furthermore, we find the failure mechanism of bio-stimulated soils is a mixture of fracture and intergranular movement. During the failure process of bio-stimulated soils, the fracture behavior becomes more obvious with an increase in degree of cementation. At the pre-peak stage, the proportion of intergranular movement gradually increases in the mixture of fracture and intergranular movement with the loading process. The main failure mechanism at the whole stage and post-peak stage is intergranular movement. The findings may contribute to the further investigation of the mechanical behavior exhibited by bio-stimulated soils.
期刊介绍:
Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.