{"title":"Safety control of blasting vibration in new tunnel excavation adjacent to existing tunnel","authors":"Junru Zhang, Zhijian Yan, Jianchi Ma, Qihua Deng, Jiaming Liu, Jimeng Feng, Zhiyong Wang","doi":"10.1007/s10064-025-04112-6","DOIUrl":null,"url":null,"abstract":"<div><p>The blasting excavation of the new tunnel will adversely affect the adjacent existing tunnel structure, to ensure the safe operation of the busy existing tunnel, the study of blasting vibration safety control is critical. In this study, based on the Xiamen New Damaoshan Tunnel No.1 project, the conversion relationship between the input energy of blasting vibration and the elastic strain energy and kinetic energy of concrete mass unit is analyzed according to the principle of conservation of energy. The estimation method of \" twice the peak kinetic energy of the peak vibration velocity instead of the maximum elastic strain energy\" is proposed, and verified by numerical simulation method. On this basis, the safe control of the vibration velocity of the existing tunnel in this project was derived by combining it with the energy criterion of concrete damage. Secondly, the blasting vibration damping control test is carried out using a test well and on-site monitoring, and the relationship between the blasting distance and the peak vibration velocity and damping efficiency is obtained for the three control techniques of the Single hole blasting, Preset damping holes, and Rope saw cutting, and the results show that the damping effect of the control technique of the Rope saw cutting is the best, and the damping effect of the Preset damping holes is second to the control technique of the damping. Finally, according to the adaptive range of different vibration control techniques for engineering application, through the peak vibration velocity monitoring of the existing tunnel, the peak vibration velocity is less than the safe vibration velocity control value proposed in this study and is in a safe state.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 2","pages":""},"PeriodicalIF":4.2000,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of Engineering Geology and the Environment","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10064-025-04112-6","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ENVIRONMENTAL","Score":null,"Total":0}
引用次数: 0
Abstract
The blasting excavation of the new tunnel will adversely affect the adjacent existing tunnel structure, to ensure the safe operation of the busy existing tunnel, the study of blasting vibration safety control is critical. In this study, based on the Xiamen New Damaoshan Tunnel No.1 project, the conversion relationship between the input energy of blasting vibration and the elastic strain energy and kinetic energy of concrete mass unit is analyzed according to the principle of conservation of energy. The estimation method of " twice the peak kinetic energy of the peak vibration velocity instead of the maximum elastic strain energy" is proposed, and verified by numerical simulation method. On this basis, the safe control of the vibration velocity of the existing tunnel in this project was derived by combining it with the energy criterion of concrete damage. Secondly, the blasting vibration damping control test is carried out using a test well and on-site monitoring, and the relationship between the blasting distance and the peak vibration velocity and damping efficiency is obtained for the three control techniques of the Single hole blasting, Preset damping holes, and Rope saw cutting, and the results show that the damping effect of the control technique of the Rope saw cutting is the best, and the damping effect of the Preset damping holes is second to the control technique of the damping. Finally, according to the adaptive range of different vibration control techniques for engineering application, through the peak vibration velocity monitoring of the existing tunnel, the peak vibration velocity is less than the safe vibration velocity control value proposed in this study and is in a safe state.
期刊介绍：
Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces:
• the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations;
• the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change;
• the assessment of the mechanical and hydrological behaviour of soil and rock masses;
• the prediction of changes to the above properties with time;
• the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
