中南大学学报（自然科学版）2018，Vol.49Issue(3)：747-755,9.DOI:10.11817/j.issn.1672-7207.2018.03.031
减震沟参数对地铁隧道爆破减震效果的影响
Analysis of effect of damping ditch parameters on blasting vibration reduction effect of metro tunnel
摘要
Abstract
In order to analyze the effect of damping ditch parameters on blasting vibration reduction effect of metro tunnel, the damping mechanism of damping ditch was discussed based on the Sodev's empirical formula and energy attenuation principle. Based on the intercity rapid rail transit of the Pearl River Delta from Guangzhou to Foshan tunnel, the tunnel model was established by using FLAC3Dsoftware, a numerical calculation scheme was designed by principle of orthogonal design, and the variation law of surface particle vibration velocity in different forms of damping ditch action during tunnel blasting construction was analyzed. The results show that the order of influence of ditch parameters on vibration reduction effect of damping ditch from large to small are the ditch depth, the horizontal distance between shock absorption ditch and blasting source, and the ditch width, which is consistent with the shock absorption mechanism of the damping ditch. Within the set parameter range of the damping ditch, the greater the depth, the greater the shock absorption rate. With the increase of the horizontal distance between the shock absorbing ditch and the explosive source, the damping rate increases firstly and then slowly. The optimization design scheme of the support project is that the width of the ditch is 12.0 m, the depth is 1.2 m, the distance between the ditch and the blasting source is 12.0 m, with the scheme, practical application effects of the scheme are very good.关键词
地铁隧道/爆破/减震沟/振动速度Key words
metro tunnel/blast/damping ditch/vibration velocity分类
能源科技引用本文复制引用
王利军,何忠明,蔡军..减震沟参数对地铁隧道爆破减震效果的影响[J].中南大学学报（自然科学版）,2018,49(3):747-755,9.基金项目
国家自然科学基金资助项目(51508042,51678073) （51508042,51678073）
广州地铁集团有限公司科研项目(HT141595) (Projects(51508042, 51678073) supported by the National Natural Science Foundation of China （HT141595）
Project(HT141595) supported by Guangzhou Metro Corporation) （HT141595）
