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。
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.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2005年第9期1417-1420,1426,共5页
Rock and Soil Mechanics
关键词
水下爆夯
振动速度
冲击水压力
underwater explosive ramming
vibration velocity
impact water pressure
