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当应力波在含结构面岩质边坡中传播时,会在坡面和结构面之间产生多重反射波,使坡面振动响应变得十分复杂。本文基于UDEC离散元数值方法对P波入射含顺层结构面岩质边坡引起的振动展开研究,通过对不同工况下坡面处质点振动放大系数的变化分析顺层结构面刚度、结构面分布角及结构面间距等对边坡动力响应的影响。结果表明:坡面振动速度放大系数随结构面刚度的增大逐渐增大,随入射波频率增大逐渐减小;坡面振动放大系数随结构面分布角变化呈V形变化;当结构面成组出现时,结构面的个数与间距共同影响坡面振动效应。此外,结合结构面附近塑性应力分布区的特征,分析应力波引起含结构面顺层岩质边坡滑动的发生机理。
Abstract:When stress wave propagates in the rock slope with structural surface, multiple reflected waves will be generated between the side slope and structural plane, which makes the slope vibration response very complicated.In view of this, based on the UDEC discrete element numerical method, the vibration caused by P wave incident on the rock slope with structural planes is studied in this paper.Through the parameter analysis of particle vibration amplification coefficient of slope surface under different working conditions, the influence of structural plane stiffness, structural plane distribution angle and structural plane spacing on slope dynamic response is revealed.The results show that the amplification coefficient of slope vibration velocity increases with the increase of structural plane stiffness but decreases with the increase of incident wave frequency.The vibration amplification coefficient of slope surface changes in V-shape with the change of structural plane inclination.When structural planes are grouped together, the number and spacing of structural planes affect the slope vibration effect.In addition, combined with the characteristics of the plastic stress distribution area near the structural plane, the mechanism of sliding of bedding rock slope with structural plane induced by stress wave is analyzed.
[1] 李海波,蒋会军,赵坚,等.动荷载作用下岩体工程安全的几个问题[J].岩石力学与工程学报,2003,22(11):1887-1891.LI H B,JIANG H J,ZHAO J,et al.Some problems about safty analysis of rock engeering under dynamic load[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(11):1887-1891.(in Chinese)
[2] LI J C,MA G W.Analysis of blast wave interaction with a rock joint[J].Rock Mechanics and Rock Engineering,2010,43(6):777-787.
[3] FENG F,CHEN S J,ZHAO X D,et al.Effects of external dynamic disturbances and structural plane on rock fracturing around deep underground cavern[J].International Journal of Coal Science & Technology,2022,9(1):15.
[4] YE Z Y,XIE J H,LU R L,et al.Simulation of seismic dynamic response and post-failure behavior of jointed rock slope using explicit numerical manifold method[J].Rock Mechanics and Rock Engineering,2022,55(11):6921-6938.
[5] 许强,刘汉香,邹威,等.斜坡加速度动力响应特性的大型振动台试验研究[J].岩石力学与工程学报,2010,29(12):2420-2428.XU Q,LIU H X,ZOU W,et al.Large-scale shaking table test study of acceleration dynamic responses characteristics of slopes[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(12):2420-2428.(in Chinese)
[6] SHEN H,LIU Y Q,LI H B,et al.Numerical evaluation of ground motion amplification of rock slopes under obliquely incident seismic waves[J].Soil Dynamics and Earthquake Engineering,2024,178:108488.
[7] LIU H F,LUO Y H,WANG Y S,et al.Influence of surface wave impedance ratios on the dynamic response and damage characteristics of slopes based on shaking table tests[J].Engineering Geology,2024,332:107452.
[8] 王思敬,张菊明.边坡岩体滑动稳定的动力学分析[J].地质科学,1982,17(2):162-170.WANG S J,ZHANG J M.On the dynamic stability of block sliding on rock slopes[J].Scientic Geologica Sinica,1982,17(2):162-170.(in Chinese)
[9] 黄润秋,李果,巨能攀.层状岩体斜坡强震动力响应的振动台试验[J].岩石力学与工程学报,2013,32(5):865-875.HUANG R Q,LI G,JU N P.Shaking table test on strong earthquake response of stratified rock slopes[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(5):865-875.(in Chinese)
[10] 祁生文,伍法权,孙进忠.边坡动力响应规律研究[J].中国科学E辑:技术科学,2003,33(S1):28-40.
[11] TAI D P,QI S W,ZHENG B W,et al.Effect of excitation frequency and joint density on the dynamic amplification effect of slope surface on jointed rock slopes[J].Engineering Geology,2024,330:107385.
[12] 陈明,卢文波,李鹏,等.岩质边坡爆破振动速度的高程放大效应研究[J].岩石力学与工程学报,2011,30(11):2189-2195.CHEN M,LU W B,LI P,et al.Elevation amplification effect of blasting vibration velocity in rock slope[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(11):2189-2195.(in Chinese)
[13] ZHANG S H,GAO W X,YE M B,et al.Dynamic response characteristics of a rock slope under blasting excavation[J].Bulletin of Engineering Geology and the Environment,2021,80(11):8453-8464.
[14] SUN X M,PANG S H,QIN K,et al.Analysis of blasting vibration signal of high steep anti-dip layered rock slope[J].Journal of Mountain Science,2022,19(11):3257-3269.
[15] LIU Y Q,LI H B,ZHAO J,et al.UDEC simulation for the dynamic response of a rock slope subject to explosions[J].International Journal of Rock Mechanics and Mining Sciences,2004,41(3):474.
[16] LI Y P,FENG C,ZHANG Y M.Numerical analysis of directional rock blasting with continuous-discontinuous element method[J].KSCE Journal of Civil Engineering,2023,27(8):3591-3598.
[17] 柴少波,周涛,田威,等.考虑岩体应力的结构面中应力波传播特性分析[J].岩土力学,2022,43(S1):184-192.CHAI S B,ZHOU T,TIAN W,et al.Analysis of stress wave propagation through a rock structural plane considering rock mass stresses[J].Rock and Soil Mechanics,2022,43(S1):184-192.(in Chinese)
[18] CHAI L Z,CHAI S B,LI P,et al.Analysis of P-wave propagation in filled jointed rock mass with viscoelastic properties[J].Geomechanics and Geophysics for Geo-Energy and Geo-Resources,2023,9(1):102.
[19] 邬爱清,丁秀丽,卢波,等.DDA方法块体稳定性验证及其在岩质边坡稳定性分析中的应用[J].岩石力学与工程学报,2008,27(4):664-672.WU A Q,DING X L,LU B,et al.Validation for rock block stability and its application to rock slope stability evaluation using DDA method[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(4):664-672.(in Chinese)
[20] 石崇,周家文,任强,等.单面边坡高程放大效应的射线理论解[J].河海大学学报(自然科学版),2008,36(2):238-241.SHI C,ZHOU J W,REN Q,et al.Ray theory solution of the elevation amplification effect on a single-free-face slope[J].Journal of Hohai University(Natural Sciences),2008,36(2):238-241.(in Chinese)
[21] 杨风威,李海波,齐三红,等.平面应力波在岩质边坡中的传播规律研究[J].岩石力学与工程学报,2015,34(S1):2623-2631.YANG F W,LI H B,QI S H,et al.Study of regularity of plane stress wave transmitting in rock slope[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(S1):2623-2631.(in Chinese)
[22] 柴少波,史杰辉,阿比尔的,等.P波入射含顺层结构面岩质边坡引起的振动[J].山东大学学报(工学版),2023,53(3):31-40.CHAI S B,SHI J H,ABI E,et al.Vibration caused by P-wave incident on a rock slope with a bedding structural plane[J].Journal of Shandong University(Engineering Science),2023,53(3):31-40.(in Chinese)
[23] CHAI S B,TIAN W,YU L Y,et al.Numerical study of ground vibrations caused by cylindrical wave propagation in a rock mass with a structural plane[J].Shock and Vibration,2020,2020:4681932.
基本信息:
DOI:
中图分类号:TU45
引用信息:
[1]史杰辉,程钊,柴少波等.应力波作用下含结构面顺层岩质边坡动力响应UDEC模拟[J].沈阳理工大学学报,2025,44(04):85-91.
基金信息:
国家自然科学基金项目(41902277); 中央高校基本科研业务费专项资金资助项目(300102282201)