水力发电2017，Vol.43Issue(12)：28-33,6.
水工隧洞设置减震层作用机理与效果分析
Analysis on Mechanism and Effects of Shock Absorption Layer in Hydraulic Tunnel
摘要
Abstract
Based on the transverse action mechanism of surrounding rock,shock absorption layer and lining in hydraulic tunnel,it is simplified to a vibration system with three degree of freedom.According to structural vibration theory,the motion equation is derived,and the deformation transfer coefficient is solved.The effects of stiffness ratio between shock absorption layer and surrounding rock mass,and the frequency ratio between seismic wave and structural self-vibration on shock absorption properties of hydraulic tunnel are discussed.On this basis,the influences of different damping materials and thicknesses on seismic response of hydraulic tunnel are analyzed.The calculation results indicate that:(a) the earthquake response of structure in low frequency can be significantly reduced,but not obvious in high frequency;(b) the shock absorption layer can effectively relieve the deformation and stress of lining structure,and the greater the elastic modulus difference between shock absorption layer and surrounding rock,the more obvious the shock absorption effect;and (c) the stress and deformation can be gradually decreased with the increase of damping layer thickness,but the stress tends to be stable with the thickness exceeding 0.2m.关键词
水工隧洞/减震层/作用机理/变形传递系数/减震效果/减震材料Key words
hydraulic tunnel/shock absorption layer/mechanism/deformation transfer coefficient/damping effect/damping material分类
建筑与水利引用本文复制引用
谢冰冰,刘琳..水工隧洞设置减震层作用机理与效果分析[J].水力发电,2017,43(12):28-33,6.基金项目
江西省交通运输厅科技项目(2017R0026、2015C0018、2015C0019、2016H0024、2016H0025) （2017R0026、2015C0018、2015C0019、2016H0024、2016H0025）
