新建京张高铁立体交叉隧道爆破振动控制研究
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摘要
为研究重载铁路交叉隧道爆破振动规律及控制爆破优化措施,以新建京张高铁草帽山隧道下穿既有唐呼重载铁路北草帽山隧道交叉工程为背景,选取与交叉段岩性相近,围岩等级分别为Ⅲ、Ⅳ及Ⅴ级的洞身段爆破施工,进行爆破振速的现场实测;通过数据拟合,得到相关爆破工程参数K、α;而后通过公式反演得到不同隧道围岩级别下穿时的最大装药量及最小控爆距离;基于经验公式理论分析,提出可实践的优化三段式爆破施工方案。现场试验证实,优化后的三段式爆破方案可以有效地减小爆破施工引起的振动,有助于本隧道下穿工程安全顺利通过。
In order to study the law of blasting vibration and optimization of the tunnel over passing the heavy haul railway,this paper selects the tunnel section with similar mechanical properties at the cross section for blasting vibration monitoring test,and classifies the collected data according to the rock grade with reference to the three-dimensional cross tunnel on Beijing to Zhangjiakou high-speed railway on Caomaoshan mountain. Through data fitting, relevant blasting engineering parameters K and α are obtained; then with formula inversion, corresponding charge and blasting distance under different surrounding rock grades is determined. Based on the theoretical analysis of empirical formula,feasible three-stage blasting construction scheme is put forward. The Field test confirms that the optimized blasting program can effectively reduce the vibration caused by blasting construction to allow successful construction of the tunnel.
In order to study the law of blasting vibration and optimization of the tunnel over passing the heavy haul railway,this paper selects the tunnel section with similar mechanical properties at the cross section for blasting vibration monitoring test,and classifies the collected data according to the rock grade with reference to the three-dimensional cross tunnel on Beijing to Zhangjiakou high-speed railway on Caomaoshan mountain. Through data fitting, relevant blasting engineering parameters K and α are obtained; then with formula inversion, corresponding charge and blasting distance under different surrounding rock grades is determined. Based on the theoretical analysis of empirical formula,feasible three-stage blasting construction scheme is put forward. The Field test confirms that the optimized blasting program can effectively reduce the vibration caused by blasting construction to allow successful construction of the tunnel.
引文
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[17]朱正国,孙明路,朱永全,等.超小净距隧道爆破振动现场监测及动力响应分析研究[J].岩土力学,2015,25(3):412-414.
[2]李景龙,李术才,李廷春,等.隧道下穿既有铁路爆破的稳定控制技术研究[J].岩石力学与工程学报,2007,35(S1):3596-3600.
[3]林从谋,陈礼彪,蒋丽丽,等.高速公路扩建大断面特小净距隧道爆破稳定控制技术研究[J].岩石力学与工程学报,2010,29(7):1371-1378.
[4]薛里,施龙焱,孙付峰.地铁浅埋隧道爆破开挖振动控制研究[J].地下空间与工程学报,2012,8(4):791-795,814.
[5]孟海利,郭峰.爆破地震波主频率的试验研究[J].铁道工程学报,2009,11(11):81-83.
[6]薛里,孟海利.电子-导爆管雷管混合起爆网路在隧道爆破中的应用[J].铁道建筑,2016(3):70-74.
[7]乔明佳.城市小净距立体空间隧道设计与施工关键技术[M].重庆:重庆大学出版社,2012.
[8]张庆松,李利平,李术才,等.小间距隧道爆破动力特性试验研究[J].岩土力学,2008,29(10):2655-2660.
[9]江杰,蒲鸥,刘刚伯,等.玉象隧道爆破振动监测与分析[J].广西大学学报(自然科学版),2016,41(6):1751-1755.
[10]王明年,潘晓马,张成满,等.邻近隧道爆破振动响应研究[J].岩土力学,2004,25(3):412-414.
[11]袁红所,张家铭,贺立新,等.复杂地质条件下隧道爆破方案优化设计[J].爆破,2016,33(1):50-54,67.
[12]傅洪贤,赵勇,谢晋水,等.隧道爆破近区爆破振动测试研究[J].岩石力学与工程学报,2011,30(2):335-340.
[13]胖涛.铁路隧道小角度斜交下穿公路隧道设计探讨[J].隧道建设,2013,33(7):573-578.
[14]王祥秋,周岳峰,周治国.爆破冲击荷载下隧道振动特性与安全性评价研究[J].中国安全科学学报,2010,20(11):134-138.
[15]TRIVINO L F,MOHANTY B,MILKEREIT B.Seismic waveforms from explosive sources located in boreholes and initiated in different directions[J].Journal of Applied Geophysics,2012,87(1):81-93.
[16]Lu Wenbo,Luo Yi,Chen Ming,et al.An introduction to chinese safety regulations for blasting vibration[J].Environmental Earth Sciences,2012,67(7):1951-1959.
[17]朱正国,孙明路,朱永全,等.超小净距隧道爆破振动现场监测及动力响应分析研究[J].岩土力学,2015,25(3):412-414.