某地下厂房岩锚梁爆破振动测试与研究
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摘要
通过测试邻近压力引水隧洞和主厂房爆破开挖对岩锚梁混凝土的影响,根据萨道夫斯基经验公式,采用回归分析方法计算出爆破地震波衰减系数α和因素系数K,得到地下洞室爆破地震波传播衰减经验公式。比较邻近压力引水隧洞和主厂房爆破地震波作用下岩锚梁的振动响应,结果显示邻近压力引水隧洞爆破开挖引起的爆破振动强度较大;地下洞室爆破地震波垂直向振动速度衰减比水平向快。结合工程实际,提出降低爆破地震效应的措施,将岩锚梁爆破振动速度控制在安全范围内,为同类工程提供参考依据。从后期监测数据看,研究成果取得了较好的应用效果。
Through the test of rock-anchored beam concrete vibration induced by blasting of the main workshop and its adjacent pressure diversion tunnels,attenuation coefficient of seismic wave and factors coefficient are acquired by the method of regression analysis according to Sadaovsky empirical formula,and the empirical formula of seismic wave are obtained.The comparisons of vibration responses of rock-anchored beam show that the vibration intensity induced by the adjacent pressure diversion tunnels blasting is higher than that induced by the main workshop blasting.The vertical vibration velocity attenuates faster than the horizontal vibration velocity.On account of construction conditions and requirements, the measurements for reducing seismic affects are proposed for the safety vibration velocity control of rock-anchored beam.The research results provide reference to similar projects.The post-monitoring data indicate the research results are affectively applied in the project.
Through the test of rock-anchored beam concrete vibration induced by blasting of the main workshop and its adjacent pressure diversion tunnels,attenuation coefficient of seismic wave and factors coefficient are acquired by the method of regression analysis according to Sadaovsky empirical formula,and the empirical formula of seismic wave are obtained.The comparisons of vibration responses of rock-anchored beam show that the vibration intensity induced by the adjacent pressure diversion tunnels blasting is higher than that induced by the main workshop blasting.The vertical vibration velocity attenuates faster than the horizontal vibration velocity.On account of construction conditions and requirements, the measurements for reducing seismic affects are proposed for the safety vibration velocity control of rock-anchored beam.The research results provide reference to similar projects.The post-monitoring data indicate the research results are affectively applied in the project.
引文
[1]李洪涛.大型地下厂房施工程序及开挖方法研究[D].武汉:武汉大学,2004.
[2]中华人民共和国国家标准编写组.GB722—2003.爆破安全规程[S].北京:中国标准出版社,2003.
[3]中华人民共和国行业标准编写组.SL—94.水工建筑物岩石基础开挖工程施工技术规范[S].北京:水利电力出版社,1994.
[4]孟吉夏,惠鸿斌.爆破测试技术[M].北京:冶金工业出版社,1992.
[5]杨年华,刘慧.近距离爆破引起的隧道周边振动场[J].工程爆破,2000,6(2):6-9.
[6]肖正学,张志呈,李朝鼎.爆破地震波动力学基础与地震效应[M].成都:电子科技大学出版社,2004.
[7]李新平,张成良,陈先仿.地下厂房岩锚梁爆破参数优化设计[J].武汉理工大学学报,2005,27(12):57-67.
[8]张成良,李新平,郭运华.地下厂房开挖卸模拟研究[J].武汉理工大学学报,2007,29(12):97-100.
[9]常春,周德培,王泳嘉,等.露天矿开采深度对边坡稳定性的影响[J].岩石力学与工程学报,1998,17(1):248-252.
[10]杨桂桐.岩体的动力特性及震动波在岩体中的传播[J].金属矿山,1992(6):33-38.
[2]中华人民共和国国家标准编写组.GB722—2003.爆破安全规程[S].北京:中国标准出版社,2003.
[3]中华人民共和国行业标准编写组.SL—94.水工建筑物岩石基础开挖工程施工技术规范[S].北京:水利电力出版社,1994.
[4]孟吉夏,惠鸿斌.爆破测试技术[M].北京:冶金工业出版社,1992.
[5]杨年华,刘慧.近距离爆破引起的隧道周边振动场[J].工程爆破,2000,6(2):6-9.
[6]肖正学,张志呈,李朝鼎.爆破地震波动力学基础与地震效应[M].成都:电子科技大学出版社,2004.
[7]李新平,张成良,陈先仿.地下厂房岩锚梁爆破参数优化设计[J].武汉理工大学学报,2005,27(12):57-67.
[8]张成良,李新平,郭运华.地下厂房开挖卸模拟研究[J].武汉理工大学学报,2007,29(12):97-100.
[9]常春,周德培,王泳嘉,等.露天矿开采深度对边坡稳定性的影响[J].岩石力学与工程学报,1998,17(1):248-252.
[10]杨桂桐.岩体的动力特性及震动波在岩体中的传播[J].金属矿山,1992(6):33-38.
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