摘要
为分析某隧道开挖爆破对邻近民房的振动干扰,对周围民房进行振动监测,获取爆破振动能量对土坯民房结构稳定性的影响特点,并采用HHT方法对振动信号进行处理。结果表明,PPV未出现明显高程放大效应,利用萨道夫斯基公式可对其衰减规律进行描述;各测点PPV介于0.01~0.09 cm/s,主频率分布在10~40 Hz,符合爆破振动安全标准;爆破振动对于4#土坯民房的影响已超过安全允许标准,并造成累积性振动损伤。后期需采取措施提升爆破振动频率,与民房自振频率错开,起到保护民房的目的。
In order to analyze the vibration interference of a certain tunnel excavation and blasting on neighboring residential buildings,the vibration monitoring of surrounding residential buildings was carried out,and the characteristics of the influence of blasting vibration energy on the structural stability of adobe residential buildings were obtained,and the vibration signal was processed by the HHT method.The results show that PPV has no obvious elevation amplification effect,and its attenuation law can be described by the Sadowski formula.The PPV of each measuring point is between 0.01~0.09 cm/s,and the main frequency is distributed between 10~40 Hz,which meets the safety standards for blasting vibration.The impact of blast⁃ing vibration on the 4#adobe houses has exceeded the safety allowable standard and caused cumulative vibra⁃tion damage.In the later stage,measures should be taken to increase the frequency of blasting vibration,which is staggered from the natural frequency of residential buildings,so as to protect the residential build⁃ings.
作者
周继国
焦健
陈德山
ZHOU Jiguo;JIAO Jian;CHEN Deshan(Department of Resources and Environmental Engineering,Lanzhou Petrochemical University of Vocational Technology)
出处
《现代矿业》
CAS
2022年第3期231-236,共6页
Modern Mining
基金
甘肃省高等学校创新基金项目(编号:2021B-588)
甘肃能源化工职业学院教科研项目(编号:2021GNHZYKY-06)。
关键词
隧道爆破
振动监测
HHT分析
振动能量
tunnel blasting
vibration monitoring
HHT analysis
energy of vibration
作者简介
周继国(1994-),男,助教,硕士,730207甘肃省兰州市;通信作者:焦健(1968-),男,教授,730207甘肃省兰州市。
