长距离引水隧洞爆破振动对临近建筑物影响的安全评价
|
摘要
近些年来随着国民经济的发展,人们对水质的要求越来越高,促进了一大批长距离引水隧洞开工建设。引水隧洞开挖时的爆破振动对临近建筑物安全影响很大,但目前水利工程中的相关爆破振动研究不多。以宁波市某引水工程工程为依托,通过亭下支洞和状元岙支洞爆破开挖过程中对临近建筑物质点爆破振动频率与振动速度进行测试和分析,结果表明:(1)当最大段装药量为9.6 kg时,土坯房的安全距离为180 m,一般砖房安全距离为60 m。(2)现场测试主要频率在10～50 Hz之间,而一般房屋建筑物的频率小于10 Hz,说明爆破振动不能与房屋产生共振。(3)振动速度不仅与爆破距离有关,也与爆破点和临近建筑物位置关系有关。
With the development of the national economy in recent years,the water quality needs of people are increasing gradually,which promote construction of a large number of long-distance diversion tunnels. Adjacent buildings are considerably influenced by blasting vibration in the process of diversion tunnels excavation.However, there are few of related research for blasting vibration on water conservancy project.Based on a hydraulic tunnel project in Ningbo city, blasting vibration and main vibration frequency of adjacent buildings around Tingxia branch and Zhuangyuanao tunnel are tested and analyzed.Results show that a safe distance for adobe houses is 180 m and general brick houses is 60 m,when the most loading charge is 9.6 kg.The tested domain frequency of buildings is between 10～50 Hz,and commonly buildings' s domain frequency is 10 Hz,which shows that blasting vibrations do not evoke resonace in buildings.The blasting vibration is not only related to the blasting distance,but also related to the relationship between the blasting point and the adjacent buildings.
With the development of the national economy in recent years,the water quality needs of people are increasing gradually,which promote construction of a large number of long-distance diversion tunnels. Adjacent buildings are considerably influenced by blasting vibration in the process of diversion tunnels excavation.However, there are few of related research for blasting vibration on water conservancy project.Based on a hydraulic tunnel project in Ningbo city, blasting vibration and main vibration frequency of adjacent buildings around Tingxia branch and Zhuangyuanao tunnel are tested and analyzed.Results show that a safe distance for adobe houses is 180 m and general brick houses is 60 m,when the most loading charge is 9.6 kg.The tested domain frequency of buildings is between 10～50 Hz,and commonly buildings' s domain frequency is 10 Hz,which shows that blasting vibrations do not evoke resonace in buildings.The blasting vibration is not only related to the blasting distance,but also related to the relationship between the blasting point and the adjacent buildings.
引文
[1] 汪旭光.爆破设计及与施工[M].北京:冶金工业出版社,2011.
[2] 刘凤成,胡五星,崔学臣.西龙池电站岩壁吊车梁爆破振动测试成果分析[J].长江科学院院报,2008,25(5):171-174.
[3] C.H.Dowding.Blast Vibration Monitoring and Control.North～Holland.Publishing Company[M].Amsterdam,1985.
[4] I.Farhoomand,E.Wilson.A Nonlinear Finite Element Code for Analyzing theBlast Response of Underground Structures[M].University of California Berkeley,California,1970.
[5] Richards AB,Moore AJ.The Effect of Blast Design on Vibration Frequencies[M]:502-509.
[6] C.H.Dowding.Suggested Method for Blast Monitoring [J].Int.J.Rock mech.Min.Sci.&Geomech.Abstr,1992,29(2):143-156.
[7] 昊德伦,叶小明.工程爆破安全振动速度综合研究.岩石力学与工程学报[J].1997,16(3):266-273.
[8] 陈中学,胡百万,刘彦波.隧道爆破振动对周边建筑物振动影响及减振措施研究[J].工程抗震与加固改造,2012,34(4):73-75
[9] 余佳力.城市隧道建设对地表建筑物的影响研究[D].武汉:武汉大学,2012.
[10] 乔雄,陈建勋,王梦茹,等.某水工隧洞爆破震动对周边建筑物影响的试验分析[J].地震工程学报,2016,38(4):504-509.
[11] GB6722-2014,爆破安全规程[S].北京:中国标准出版社,2014:42-43.
[12] 赵江倩.万石山隧道振动特性及施工控制技术研究[D].南昌:南昌大学,2007.
[2] 刘凤成,胡五星,崔学臣.西龙池电站岩壁吊车梁爆破振动测试成果分析[J].长江科学院院报,2008,25(5):171-174.
[3] C.H.Dowding.Blast Vibration Monitoring and Control.North～Holland.Publishing Company[M].Amsterdam,1985.
[4] I.Farhoomand,E.Wilson.A Nonlinear Finite Element Code for Analyzing theBlast Response of Underground Structures[M].University of California Berkeley,California,1970.
[5] Richards AB,Moore AJ.The Effect of Blast Design on Vibration Frequencies[M]:502-509.
[6] C.H.Dowding.Suggested Method for Blast Monitoring [J].Int.J.Rock mech.Min.Sci.&Geomech.Abstr,1992,29(2):143-156.
[7] 昊德伦,叶小明.工程爆破安全振动速度综合研究.岩石力学与工程学报[J].1997,16(3):266-273.
[8] 陈中学,胡百万,刘彦波.隧道爆破振动对周边建筑物振动影响及减振措施研究[J].工程抗震与加固改造,2012,34(4):73-75
[9] 余佳力.城市隧道建设对地表建筑物的影响研究[D].武汉:武汉大学,2012.
[10] 乔雄,陈建勋,王梦茹,等.某水工隧洞爆破震动对周边建筑物影响的试验分析[J].地震工程学报,2016,38(4):504-509.
[11] GB6722-2014,爆破安全规程[S].北京:中国标准出版社,2014:42-43.
[12] 赵江倩.万石山隧道振动特性及施工控制技术研究[D].南昌:南昌大学,2007.