爆破地震波作用下既有圆形隧道衬砌动应力集中系数分析
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摘要
将爆破地震波进行合理近似简化,采用波函数展开法,推导出无限岩石介质中爆破地震波作用下隧道围岩和衬砌动应力集中系数的表达式。结合具体算例,分析隧道不同位置上爆破地震波主频、隧道几何参数和隧道围岩和衬砌物理力学指标对动应力集中系数的影响。分析结果表明,爆破地震波主振频率对隧道围岩和衬砌中的动应力集中系数(DSCF)影响较大,隧道不同位置和不同方向应力的动应力集中系数随主振频率的变化趋势不同,低主振频率引起的动应力集中系数较大,不利于隧道的抗爆破振动;隧道几何参数对隧道围岩和衬砌内侧切向应力动应力集中系数影响趋势不同;隧道衬砌弹性模量对隧道结构动应力集中系数影响较大,泊松比次之;泊松比较大的隧道围岩具有一定的抗爆破振动作用,但效果有限。
The blasting seismic wave is simplified reasonably.Based on wave function expansion method,the dynamic stress concentration factor equation of tunnel surrounding rock and lining under the blasting seismic wave is deduced in infinite rock.Combining with a typical case,the influences of the main frequency of the blasting seismic wave,geometric parameters and the physico-mechanical indices of tunnel surrounding rock and lining on dynamic stress concentration factor in the different positions of tunnel are analyzed.The analytical results show that the trend of dynamic stress concentration factor of different direction stresses with the main frequency of the blasting seismic wave are different at different positions.The dynamic stress concentration factor caused by the blasting seismic wave with low main frequency of the blasting seismic wave is larger,which is unfavorable for blasting vibration resistance.The influence trend of tunnel geometric parameters on the dynamic stress concentration factor of tangential stress of tunnel surrounding rock and lining is different.The elastic modulus of tunnel lining has a greater effect on dynamic stress concentration factor than the Poisson’s ratio.The tunnel surrounding rock with larger Poisson’s ratio have the effect of blasting vibration resistance,but the effect is limited.
The blasting seismic wave is simplified reasonably.Based on wave function expansion method,the dynamic stress concentration factor equation of tunnel surrounding rock and lining under the blasting seismic wave is deduced in infinite rock.Combining with a typical case,the influences of the main frequency of the blasting seismic wave,geometric parameters and the physico-mechanical indices of tunnel surrounding rock and lining on dynamic stress concentration factor in the different positions of tunnel are analyzed.The analytical results show that the trend of dynamic stress concentration factor of different direction stresses with the main frequency of the blasting seismic wave are different at different positions.The dynamic stress concentration factor caused by the blasting seismic wave with low main frequency of the blasting seismic wave is larger,which is unfavorable for blasting vibration resistance.The influence trend of tunnel geometric parameters on the dynamic stress concentration factor of tangential stress of tunnel surrounding rock and lining is different.The elastic modulus of tunnel lining has a greater effect on dynamic stress concentration factor than the Poisson’s ratio.The tunnel surrounding rock with larger Poisson’s ratio have the effect of blasting vibration resistance,but the effect is limited.
引文
[1]易长平,曹跃,张建华,等.不同厚度混凝土衬砌的爆破临界振速研究[J].武汉理工大学学报,2009,31(1):91-94.YI Chang-ping,CAO Yue,ZHANG Jian-hua,et al.Research on critical failure vibration velocity of concretelining in different thicknesses under the acting of blastingvibration[J].Journal of Wuhan University ofTechnology,2009,31(1):91-94.
[2]蒋楠,周传波,罗钢,等.铁路隧道混凝土衬砌爆破振动安全判据[J].中南大学学报(自然科学版),2012,43(7):2746-2750.JIANG Nan,ZHOU Chuan-bo,LUO Gang,et al.Blastingvibration safety criterion of railway tunnel concretelining[J].Journal of Central South University(Scienceand Technology),2012,43(7):2746-2750.
[3]李宁,陈蕴生,韩烜.爆振对衬砌损伤特性影响的室内试验研究[J].工程爆破,1996,2(2):6-10.LI Ning,CHEN Yun-sheng,HAN xuan.Laboratory teston damage behavior of the tunnel lining under blastingload[J].Engineering Blasting,1996,2(2):6-10.
[4]张程红.邻近隧道爆破施工引起的既有隧道衬砌振动速度阈值分析[D].兰州:兰州交通大学土木工程学院,2009.
[5]李兴华.高程差对爆破震动信号特性影响分析[D].南京:解放军理工大学,2010.
[6]朱传云,许桂生.爆炸应力波近似处理的分析与研究[J].岩土力学,2002,23(4):455-458.ZHU Chuan-yun,XU Gui-sheng.Analysis and study ondealing with blasting wave as planar-wave[J].Rock andSoil Mechanics,2002,23(4):455-458.
[7]穆朝民,齐娟.柱状装药爆破应力分布的研究[J].爆炸与冲击,2010,29(10):91-94.MU Chao-min,QI Juan.Distribut ion of stress causedby column charge blasting[J].Explosion and ShockWaves,2010,29(10):91-94.
[8]肖正学.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.
[9]钟启凯.地下圆形组合衬砌洞室在地震波下的动力反应分析[D].长沙:湖南大学,2009.
[10]PAO Yih-hsing,MOW Chao-chow.Diffraction of elasticwaves and dynamic stress concentrations[M].Crane:Russak&Company,1973.
[11]张凤祥.盾构隧道[M].北京:人民交通出版社,2004.
[12]周向阳,徐全军,姜楠,等.上跨运行地铁的南京红山南路隧道爆破安全管理[J].工程爆破,2011,17(4):97-99.ZHOU Xiang-yang,XU Qun-jun,JIANG Nan,et al.Blasting safety management of Nanjing Hongshan southroad tunnels over the running subway[J].EngineeringBlasting,2011,17(4):97-99.
[13]言志信,彭宁波,江平,等.爆破振动安全标准探讨[J].煤炭学报,2011,36(8):1281-1284.YAN Zhi-xin,PENG Ning-bo,JIANG Ping,et al.Research about blasting vibration safety criteria[J].Journal of China Coal Society,2011,36(8):1281-1284.
[14]李孝林,王少雄,高怀树.爆破振动频率影响因素分析[J].辽宁工程技术大学学报,2006,25(2):204-206.LI Xiao-lin,WANG Shao-xiong,GAO Huai-shu.Analysis of factors affecting blasting vibrationfrequency[J].Journal of Liaoning Technical University,2006,25(2):204-206.
[15]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,2003.
[2]蒋楠,周传波,罗钢,等.铁路隧道混凝土衬砌爆破振动安全判据[J].中南大学学报(自然科学版),2012,43(7):2746-2750.JIANG Nan,ZHOU Chuan-bo,LUO Gang,et al.Blastingvibration safety criterion of railway tunnel concretelining[J].Journal of Central South University(Scienceand Technology),2012,43(7):2746-2750.
[3]李宁,陈蕴生,韩烜.爆振对衬砌损伤特性影响的室内试验研究[J].工程爆破,1996,2(2):6-10.LI Ning,CHEN Yun-sheng,HAN xuan.Laboratory teston damage behavior of the tunnel lining under blastingload[J].Engineering Blasting,1996,2(2):6-10.
[4]张程红.邻近隧道爆破施工引起的既有隧道衬砌振动速度阈值分析[D].兰州:兰州交通大学土木工程学院,2009.
[5]李兴华.高程差对爆破震动信号特性影响分析[D].南京:解放军理工大学,2010.
[6]朱传云,许桂生.爆炸应力波近似处理的分析与研究[J].岩土力学,2002,23(4):455-458.ZHU Chuan-yun,XU Gui-sheng.Analysis and study ondealing with blasting wave as planar-wave[J].Rock andSoil Mechanics,2002,23(4):455-458.
[7]穆朝民,齐娟.柱状装药爆破应力分布的研究[J].爆炸与冲击,2010,29(10):91-94.MU Chao-min,QI Juan.Distribut ion of stress causedby column charge blasting[J].Explosion and ShockWaves,2010,29(10):91-94.
[8]肖正学.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.
[9]钟启凯.地下圆形组合衬砌洞室在地震波下的动力反应分析[D].长沙:湖南大学,2009.
[10]PAO Yih-hsing,MOW Chao-chow.Diffraction of elasticwaves and dynamic stress concentrations[M].Crane:Russak&Company,1973.
[11]张凤祥.盾构隧道[M].北京:人民交通出版社,2004.
[12]周向阳,徐全军,姜楠,等.上跨运行地铁的南京红山南路隧道爆破安全管理[J].工程爆破,2011,17(4):97-99.ZHOU Xiang-yang,XU Qun-jun,JIANG Nan,et al.Blasting safety management of Nanjing Hongshan southroad tunnels over the running subway[J].EngineeringBlasting,2011,17(4):97-99.
[13]言志信,彭宁波,江平,等.爆破振动安全标准探讨[J].煤炭学报,2011,36(8):1281-1284.YAN Zhi-xin,PENG Ning-bo,JIANG Ping,et al.Research about blasting vibration safety criteria[J].Journal of China Coal Society,2011,36(8):1281-1284.
[14]李孝林,王少雄,高怀树.爆破振动频率影响因素分析[J].辽宁工程技术大学学报,2006,25(2):204-206.LI Xiao-lin,WANG Shao-xiong,GAO Huai-shu.Analysis of factors affecting blasting vibrationfrequency[J].Journal of Liaoning Technical University,2006,25(2):204-206.
[15]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,2003.
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