| 抛石基床爆夯振动效应监测与分析 |
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| 引用本文： | 李俊如,李海波,高建光,周青春,刘亚群.抛石基床爆夯振动效应监测与分析[J].岩土力学,2005,26(9):1417-1420. |
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| 作者姓名： | 李俊如 李海波 高建光 周青春 刘亚群 |
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| 作者单位： | 中国科学院武汉岩土力学研究所,武汉,430071 |
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| 基金项目： | 杨传嘉副研究员参加现场爆夯主要工作.现场工作得到中港集团第二航务局的相关领导和同志的积极配合和支持,在此表示谢意! |
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| 摘 要： | 根据对广西钦州港二期码头爆夯监测,分析了爆夯产生的振动速度和冲击波超压变化规律。结果表明,实测质点振动速度衰减规律与规范提供的经验公式基本相同;由于自由面反射的稀疏波作用,实测冲击波超压值远小于经验公式提供的结果;分析结果还表明,由于冲击波的脉动作用,即使在一次起爆(不分段)情况下,振动速度和冲击波超压波形也会产生多次振动现象,其振动强度越来越小;另外,由于稀疏波作用,在相同的爆炸条件下,测点入水深度越大,其冲击波超压值越高;测点入水深度越小,冲击波超压值越低。该分析结果可为类似工程提供借鉴。
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| 关 键 词： | 水下爆夯 振动速度 冲击水压力 |
| 文章编号： | 1000-7598-（2005）09-1417-04 |
| 收稿时间： | 2004-09-08 |
| 修稿时间： | 2004-09-082004-12-13 |
Monitoring and analysis of vibration effects due to underwater explosive ramming |
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| LI Jun-ru,LI Hai-bo,GAO Jian-guang,ZHOU Qing-chun,LIU Ya-qun.Monitoring and analysis of vibration effects due to underwater explosive ramming[J].Rock and Soil Mechanics,2005,26(9):1417-1420. |
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| Authors: | LI Jun-ru LI Hai-bo GAO Jian-guang ZHOU Qing-chun LIU Ya-qun |
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| Institution: | Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
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| Abstract: | Characteristics of the vibration and impact water pressure are analysed based on the in-situ monitoring for the Qinzhou Harbour (second phrase) underwater explosive ramming. It is revealed that monitoring results of the vibration velocity agree well with the empirical formula; while the monitoring value of the impact water pressure is far less than that of empirical formula as the existence of tensile wave. It is also reported that there is pulse phenomenon for the velocity and the impact water pressure, and the intensity intend to decrease. In addition, it is also suggested that the value of the impact water pressure increases with the increasing throw-in water depth because of the tensile wave. The results can be a good reference for the similar engineerings. |
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| Keywords: | underwater explosive ramming vibration velocity impact water pressure |
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