振动效应受锚边坡锚固长度优化分析
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摘要
以矿山受锚边坡为研究对象,基于坡底振动荷载对边坡稳定性的影响,分析了振动波在坡体介质中的传播特征,建立了P波入射的传播模型,结合波程差概念,获得了在坡表浅层区域振动增强的最大影响深度。结合某矿山边坡工程预应力锚杆加固算例表明:将锚杆设计长度提高16.7%后,边坡剪切带范围从坡顶向下逐渐减小,且锚杆内力呈较均匀分布,增强了振动条件下边坡的稳定性,可为矿山边坡锚固参数的设计提供借鉴。
Taking mine anchorage slope as the research object,based on the influence of rock bottom vibration load on slope stability,this paper analyzes the propagation characteristics of seismic wave in slope medium,establishes the propagation model of P-wave incident shot,and obtains the maximum influence depth of vibration enhancement in the shallow zone of slope surface with the concept of wave path difference.An example of mine slope reinforcement project combined with prestressed anchorage shows that after increasing the designed length of the anchorag by 16.7%,the range of shear zone of the slope gradually decreases from the top down,and the internal force of the anchorage presents a more uniform distribution,which enhances the stability of the slope under vibration conditions,which provides a reference for the design of the anchorage parameters of the mine slope.
Taking mine anchorage slope as the research object,based on the influence of rock bottom vibration load on slope stability,this paper analyzes the propagation characteristics of seismic wave in slope medium,establishes the propagation model of P-wave incident shot,and obtains the maximum influence depth of vibration enhancement in the shallow zone of slope surface with the concept of wave path difference.An example of mine slope reinforcement project combined with prestressed anchorage shows that after increasing the designed length of the anchorag by 16.7%,the range of shear zone of the slope gradually decreases from the top down,and the internal force of the anchorage presents a more uniform distribution,which enhances the stability of the slope under vibration conditions,which provides a reference for the design of the anchorage parameters of the mine slope.
引文
[1]康永君,杨军,宋二祥.地震作用下边坡安全系数时程计算及参数研究[J].岩土力学,2011,32(1):261-268.
[2]戴俊.岩石动力学特性与爆破理论(第2版)[M].北京:冶金工业出版社,2013.
[3]耿清友,康志强,张雪岩,等.地震作用下某矿山排土场边坡稳定性分析[J].化工矿物与加工,2017,46(12):50-52.
[4]叶红.风化砂岩中压力型锚索锚固段应力数值模拟分析[J].化工矿物与加工,2018,47(7):42-46.
[5]SILLER T J,CHRISTIANO P P,JACOBO B.Seismic response of tied-back retaining walls[J].Earthquake Engineering&Structural Dynamics,2010,20(7)605-620.
[6]王军,曹平,梁桥,等.重载作用受锚边坡动力稳定性分析[J].公路交通科技,2016,33(9):20-24.
[7]王礼立.应力波基础[M].北京:国防工业出版社,2010.
[8]叶海林,黄润秋,郑颖人,等.岩质边坡锚杆支护参数地震敏感性分析[J].岩土工程学报,2010,32(9):1 374-1 379.
[9]Jun Wang,Jie Liu,Qiao Liang,et al.Dynamic response to seismic waves at the shallow slope supported by bolts[J].Geotechnical and Geological Engineering,2018,36(4):1 991-2 001.
[2]戴俊.岩石动力学特性与爆破理论(第2版)[M].北京:冶金工业出版社,2013.
[3]耿清友,康志强,张雪岩,等.地震作用下某矿山排土场边坡稳定性分析[J].化工矿物与加工,2017,46(12):50-52.
[4]叶红.风化砂岩中压力型锚索锚固段应力数值模拟分析[J].化工矿物与加工,2018,47(7):42-46.
[5]SILLER T J,CHRISTIANO P P,JACOBO B.Seismic response of tied-back retaining walls[J].Earthquake Engineering&Structural Dynamics,2010,20(7)605-620.
[6]王军,曹平,梁桥,等.重载作用受锚边坡动力稳定性分析[J].公路交通科技,2016,33(9):20-24.
[7]王礼立.应力波基础[M].北京:国防工业出版社,2010.
[8]叶海林,黄润秋,郑颖人,等.岩质边坡锚杆支护参数地震敏感性分析[J].岩土工程学报,2010,32(9):1 374-1 379.
[9]Jun Wang,Jie Liu,Qiao Liang,et al.Dynamic response to seismic waves at the shallow slope supported by bolts[J].Geotechnical and Geological Engineering,2018,36(4):1 991-2 001.