海边山坡场地爆破地震波的衰减测试与分析
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摘要
根据经验公式估算爆破引起的质点振动,对于不同的场地系数K和衰减系数α取值存在较大的计算偏差。为克服这一问题,通过对一实际场地爆破工程的现场测试,取得了该场地不同距离处的质点振动速度和主振频率,在比较分析实测结果与计算结果的基础上,采用最小二乘原理对场地参数和衰减指数进行了回归统计,得到了场地的衰减指数及场地常数。通过工程实例说明,现场测试及回归统计方法是获取爆破地震波的衰减规律的有效手段。
The inappropriate location coefficient K and attenuation coefficient α will cause an obvious deviation when calculating the ground vibration in blasting engineering based on the empirical formula. In this paper,through testing a blasting engineering at a hillside field near coast,the ground vibration and the dominant vibration frequency at different distances were obtained. Compared the result of testing and empirical calculation,K and α were acquired by using the least-square regression. The engineering practice demonstrates that the least-square regression is effective in analysis of the blasting vibration attenuation.
The inappropriate location coefficient K and attenuation coefficient α will cause an obvious deviation when calculating the ground vibration in blasting engineering based on the empirical formula. In this paper,through testing a blasting engineering at a hillside field near coast,the ground vibration and the dominant vibration frequency at different distances were obtained. Compared the result of testing and empirical calculation,K and α were acquired by using the least-square regression. The engineering practice demonstrates that the least-square regression is effective in analysis of the blasting vibration attenuation.
引文
[1]刘殿中,杨仕春主编.工程爆破实用手册[M].北京:冶金工业出版社,2003:658-661.
[2]郑炳旭,王永庆,魏晓林.城镇石方爆破[M].北京:冶金工业出版社,2004:34-37.
[3]全国机械振动与冲击化技术委员会.GB/T14124-93机械振动与冲击对建筑物振动影响的测量和评价基本方法及使用导则[S].北京:中国标准出版社,1994.
[4]中国工程爆破协会.GB6722-2003爆破安全规程[S].北京:中国标准出版社,2004.
[2]郑炳旭,王永庆,魏晓林.城镇石方爆破[M].北京:冶金工业出版社,2004:34-37.
[3]全国机械振动与冲击化技术委员会.GB/T14124-93机械振动与冲击对建筑物振动影响的测量和评价基本方法及使用导则[S].北京:中国标准出版社,1994.
[4]中国工程爆破协会.GB6722-2003爆破安全规程[S].北京:中国标准出版社,2004.
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