摘要
对某两连体石灰窑的拆除爆破振动进行了监测,采集了石灰窑爆破及塌落产生的振动数据。石灰窑拆除塌落触地振动的场地常数K为0.132,衰减指数α为1.489,得出石灰窑塌落触地振动经验公式。爆破振动最大振动速度为3.287cm/s,主频主要集中在6.104~28.076Hz;塌落触地振动最大振动速度为7.322cm/s,主频主要集中在2.441~6.714Hz。塌落触地振动速度比爆破振动速度大,主频更接近建筑物的固有频率,因此,在大型构筑物倒塌方向应采取缓冲措施。这些资料可为石灰窑、烟囱及楼房等大型建筑物的爆破拆除设计及对周围环境的影响评估提供参考。
Demolition blasting vibration of a two-piece lime kiln was monitored, and the vibration data generated by blasting and lime kiln collapse were collected. The site constant K of the limestone kiln s collapse and ground vibration is 0.132 , and the attenuation index α is 1.489. Empirical formula of the lime kiln collapse grounding vibration was obtained. The maximum vibration velocity of blasting vibration is 3.287 cm/s, and the main frequency is mainly concentrated at 6.104 -28.076 Hz. The maximum vibration velocity of collapse grounding vibration is 7.322 cm/s, and the main frequency is mainly concentrated at 2.441-6.714 Hz. Collapse ground-touching vibration speed is greater than that of blasting vibration, and the main frequency is closer to the natural frequency of the building. Therefore, buffer measures should be taken in the collapse direction of large structures. The study can provide reference for the blasting demolition design of large buildings such as lime kiln, chimney and buildings and the impact assessment of the surrounding environment.
作者
林飞
LIN Fei(Huaibei Blasting Technology and Engineering Institute Co., Ltd., CCTEG (Anhui Huaibei, 235000))
出处
《爆破器材》
CAS
北大核心
2019年第5期61-64,共4页
Explosive Materials
关键词
石灰窑
爆破拆除
爆破振动
塌落触地振动
振动测试
大型构筑物
lime kiln
blasting demolition
blasting vibration
collapse ground-touching vibration
vibration test
large structures
