爆破振动对砂浆锚杆的影响研究
|
摘要
爆破振动对锚杆有不利影响,运用应力波理论,并利用波函数展开法,研究了爆炸应力波与锚杆的相互作用过程,给出了爆破振动作用下砂浆锚杆周围砂浆体中的动应力和峰值振速分布情况,比较了不同频率应力波对锚杆的影响,导出了不同频率应力波作用下砂浆锚杆的安全质点振速范围。研究结果表明:入射波频率越高,砂浆锚杆所允许的安全质点峰值振速越大。
Blasting vibration can induce some adverse influence on grouted rockbolt.The stress wave theory and wave function expansion method are adopted to analyze the interaction between stress wave and rockbolt.The distribution of stress and peak particle velocity around grout under the blasting vibration is derived;influences of stress wave in different frequencies on grouted rockbolt are compared;the safe peak particle velocity range in the grouted rockbolt is derived with stress waves of different frequencies.The result shows that the higher the frequency of incident wave is,the bigger the safe peak vibration velocity for grouted rockbolt is.
Blasting vibration can induce some adverse influence on grouted rockbolt.The stress wave theory and wave function expansion method are adopted to analyze the interaction between stress wave and rockbolt.The distribution of stress and peak particle velocity around grout under the blasting vibration is derived;influences of stress wave in different frequencies on grouted rockbolt are compared;the safe peak particle velocity range in the grouted rockbolt is derived with stress waves of different frequencies.The result shows that the higher the frequency of incident wave is,the bigger the safe peak vibration velocity for grouted rockbolt is.
引文
[1]陆遐龄.岩石高边坡爆破开挖对锚固设施的影响[J].爆破,2000,(增刊):147-151.LU Xia-ling.Influence of rock high slope explosive excavation on anchored installations[J].Blasting,2000,(Supp.):147-151.
[2]Tannant D D,Brummer R K.Rockbolt behaviour under dynamic loading field tests and modeling[J].Int.J.Rock.Mech.Min.Sci&Geomech.Abstr.,1995,32(6):537-550.
[3]Gisle Stjern,Arne.Myrvang,The influence of blasting on grouted rockbolts[J].Tunneling and Underground Space Technology,1995,13(1):65-70.
[4]张云,刘开运.近区爆破对锚固设施的影响研究[J].水力发电,1996,(8):23-26.ZHANG Yun,LIU Kai-yun.Study of blast-induced influence on vicinal anchored installations[J].Water Power,1996,(8):23-26.
[5]张明瑶,张云.岩质高边坡开挖及加固措施研究[R].西安:电力工业部西北勘测设计研究院,1995.
[6]程良奎,范景能,韩军,等.岩土锚固[M].北京:中国建筑工业出版社,2003.
[7]许红涛,卢文波,蔡联明.邻近爆破对坝基灌浆帷幕的影响机理研究[J].岩石力学与工程学报,2004,23(8):1 325-1 329.XU Hong-tao,LU Wen-bo,CAI Lian-ming.Mechanism study of blast-induced influence on vicinal curtain grouting[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(8):1 325-1 329.
[8]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 on dealing with blasting wave as planar-wave[J].Rock and Soil Mechanics,2002,23(4):455-458.
[9]梁建文,严林隽,Vincent W Lee.圆弧形层状沉积谷地对入射平面P波的散射解析解[J].地震学报,2001,23(2):167-184.LIANG Jian-wen,YAN Lin-jun,Vincent W Lee.Scattering of plane P waves by circular-arc layered alluvial valleys:an analytical solution[J].Acta Seismologica Sinica,2001,23(2):167-184.
[10]Pao Y H,Mow C C.The diffraction of elastic waves and dynamic stress concentrations[M].New York:Crane&Russak,1973.
[2]Tannant D D,Brummer R K.Rockbolt behaviour under dynamic loading field tests and modeling[J].Int.J.Rock.Mech.Min.Sci&Geomech.Abstr.,1995,32(6):537-550.
[3]Gisle Stjern,Arne.Myrvang,The influence of blasting on grouted rockbolts[J].Tunneling and Underground Space Technology,1995,13(1):65-70.
[4]张云,刘开运.近区爆破对锚固设施的影响研究[J].水力发电,1996,(8):23-26.ZHANG Yun,LIU Kai-yun.Study of blast-induced influence on vicinal anchored installations[J].Water Power,1996,(8):23-26.
[5]张明瑶,张云.岩质高边坡开挖及加固措施研究[R].西安:电力工业部西北勘测设计研究院,1995.
[6]程良奎,范景能,韩军,等.岩土锚固[M].北京:中国建筑工业出版社,2003.
[7]许红涛,卢文波,蔡联明.邻近爆破对坝基灌浆帷幕的影响机理研究[J].岩石力学与工程学报,2004,23(8):1 325-1 329.XU Hong-tao,LU Wen-bo,CAI Lian-ming.Mechanism study of blast-induced influence on vicinal curtain grouting[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(8):1 325-1 329.
[8]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 on dealing with blasting wave as planar-wave[J].Rock and Soil Mechanics,2002,23(4):455-458.
[9]梁建文,严林隽,Vincent W Lee.圆弧形层状沉积谷地对入射平面P波的散射解析解[J].地震学报,2001,23(2):167-184.LIANG Jian-wen,YAN Lin-jun,Vincent W Lee.Scattering of plane P waves by circular-arc layered alluvial valleys:an analytical solution[J].Acta Seismologica Sinica,2001,23(2):167-184.
[10]Pao Y H,Mow C C.The diffraction of elastic waves and dynamic stress concentrations[M].New York:Crane&Russak,1973.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心