预制裂隙红砂岩在冲击荷载作用下的动力特性
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摘要
红砂岩是南方地区普遍存在的泥状胶结结构土,为研究其在冲击荷载作用下的动力特性,本文采用理论分析和落锤试验相结合的方法,开展了节理砂岩和完整砂岩的冲击动力试验。结果表明:砂岩加载速率和卸载速率近似相等,节理砂岩达到峰值强度后存在短暂的蠕变现象;当冲击能较小且岩石较质密时,加载中后期位移会出现轻微反弹,反弹位移随落锤质量的增加而减小;节理的存在使得加速度时程曲线出现两个峰值,砂岩破坏被分为两次峰值加速度前后明显的两段;根据能量守恒原理,验证了裂隙岩体破坏时吸收的能量小于完整岩体吸收的能量。本试验研究可为红砂岩类围岩硐室的稳定性控制提供理论依据。
Red sandstone is a kind of clayey cementitious structural soil that commonly found in the southern region,in order to study its dynamic characteristics under impact load,the impact dynamic tests of fractured sandstone and intact sandstone are carried out by combining theoretical analysis and drop hammer test.The test results show that the loading rate and unloading rate of the red sandstone are approximately the same,and there is short creep after the joint rock reaches the peak intensity.When the impact energy is small and the rock is dense,the mid-to-late displacement will rebound slightly,and the rebound displacement will decrease with the increase of the weight of the hammer.There are two spikes in the acceleration curve during the acceleration,and the sandstone damage is divided into two periods of apparent peak acceleration before and after.According to the principle of energy conservation,it is proved that the energy absorbed by fractured rock mass is less than that absorbed by intact rock mass.It is hoped that the results of this experiment can provide references for the construction of red sandstone rock foundation.
Red sandstone is a kind of clayey cementitious structural soil that commonly found in the southern region,in order to study its dynamic characteristics under impact load,the impact dynamic tests of fractured sandstone and intact sandstone are carried out by combining theoretical analysis and drop hammer test.The test results show that the loading rate and unloading rate of the red sandstone are approximately the same,and there is short creep after the joint rock reaches the peak intensity.When the impact energy is small and the rock is dense,the mid-to-late displacement will rebound slightly,and the rebound displacement will decrease with the increase of the weight of the hammer.There are two spikes in the acceleration curve during the acceleration,and the sandstone damage is divided into two periods of apparent peak acceleration before and after.According to the principle of energy conservation,it is proved that the energy absorbed by fractured rock mass is less than that absorbed by intact rock mass.It is hoped that the results of this experiment can provide references for the construction of red sandstone rock foundation.
引文
[1] WU F,WU J,QI S.Phenomena and theoretical analysis for the failure of brittle rocks[J].Journal of Rock Mechanics and Geotechnical Engineering,2010,2(4):331-337.
[2]詹金武,张乃烊,黄明,等.冲击荷载作用下含水泥质粉砂岩的损伤规律研究[J].有色金属:矿山部分,2015,67(6):44-48.ZHAN Jinwu,ZHANG Naiyang,HUANG Ming,et al.Study on the damage feature of water-bearing argillaceous siltstone under the impact load[J].Non-Ferrous Metal:Mine Section,2015,67(6):44-48.
[3] SERGO K,EDGAR M,NIKOLOZ C,et al.Rock directed breaking under the impulse load[J].IOP Conference Series:Earth and Environmental Science,2016,44(5).DOI:10.1088/1755-1315/44/5/052005.
[4]曾晟,江博为,邓显石,等.层状节理岩体模型冲击实验[J].中国安全生产科学技术,2016,12(1):176-180.ZENG Sheng,JIANG Bowei,DENG Xianshi,et al.Impact tests on model of layered and jointed rock mass[J].Journal of Safety Science and Technology,2016,12(1):176-180.
[5]宋义敏,何爱军,王泽军,等.冲击荷载作用下岩石动态断裂试验研究[J].岩土力学,2015,36(4):965-970.SONG Yimin,HE Aijun,WANG Zejun,et al.Experiment study of the dynamic fractures of rock under impact loading[J].Rock and Soil Mechanics,2015,36(4):965-970.
[6]叶涛,张柱银.动高压冲击下岩石破裂机理及相变研究[J].岩土力学,2007,28(10):2198-2201.YE Tao,ZHANG Zhuyin.Experiment on fracture mechanism of rocks under dynamic high-pressure[J].Rock and Soil Mechanics,2007,28(10):2198-2201.
[7]王道荣,李宏杰,赵巨岩,等.高速冲击下铝锂合金材料断裂强度的实验研究[C]∥第六届全国爆炸力学实验技术学术会议论文集.安徽:中国力学学会爆炸力学实验技术专业组,2011:337-341.
[8]马江锋,张秀丽,焦玉勇,等.用非连续变形分析方法模拟冲击荷载作用下巴西圆盘的破坏过程[J].岩石力学与工程学报,2015,34(9):1805-1814.MA Jiangfeng,ZHANG Xiuli,JIAO Yuyong,et al.Numerical simulation of failure of brazilian disc specimen under dynamic loading using discontinuous deformation analysis method[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(9):1805-1814.
[9] OBOLTAJoko, SHARMAABAkanshu. Numerical simulation of reinforced concrete beams with different shear reinforcements under dynamic impact loads[J].International Journal of Impact Engineering,2011,8:940-950.
[10] HUANG S,LIU Q,CHENG A,et al.A statistical damage constitutive model under freeze-thaw and loading for rock and its engineering application[J].Cold Regions Science and Technology,2017,10:142-150.
[11] YOSSEF H H,FENG X,LI S,et al.Tunnel reinforcement in columnar jointed basalts:the role of rock mass anisotropy[J].Tunnelling and Underground Space Technology Incorporating Trenchless Technology Research,2015,46:1-11.
[12]苗胜军,王子木,刘亚运,等.岩石质量模糊综合评价模型及应用[J].中国矿业,2017,26(7):147-150.MIAO Shengjun,WANG Zimu,LIU Yayun,et al.A model for fuzzy comprehensively evaluating rocks quality and its application[J].China Mining Magazine,2017,26(7):147-150.
[13] ZHOU Z,JIANG Y,ZOU Y,et al.Degradation mechanism of rock under impact loadings by integrated investigation on crack and damage development[J].Journal of Central South University,2014,21(12):4646-4652.
[14]陈新,廖志洪,李德建.节理倾角及连通率对岩体强度、变形影响的单轴压缩试验研究[J].岩石力学与工程学报,2011,30(4):781-789.CHEN Xin,LIAO Zhihong,LI Dejian.Experimental study of effects of joint inclination angle and connectivity rate on strength and deformation properties of rock masses under uniaxial compression[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(4):781-789.
[15]栗东平,王超圣,薛东杰,等.单节理抗压强度的数值模拟[J].辽宁工程技术大学学报:自然科学版,2015,32(2):150-154.LI Dongping,WANG Chaosheng,XUE Dongjie,et al.Numerical simulation on compressive strength of single jointed rock mass[J].Journal of Liaoning Technical University:Natural Science,2015,32(2):150-154.
[2]詹金武,张乃烊,黄明,等.冲击荷载作用下含水泥质粉砂岩的损伤规律研究[J].有色金属:矿山部分,2015,67(6):44-48.ZHAN Jinwu,ZHANG Naiyang,HUANG Ming,et al.Study on the damage feature of water-bearing argillaceous siltstone under the impact load[J].Non-Ferrous Metal:Mine Section,2015,67(6):44-48.
[3] SERGO K,EDGAR M,NIKOLOZ C,et al.Rock directed breaking under the impulse load[J].IOP Conference Series:Earth and Environmental Science,2016,44(5).DOI:10.1088/1755-1315/44/5/052005.
[4]曾晟,江博为,邓显石,等.层状节理岩体模型冲击实验[J].中国安全生产科学技术,2016,12(1):176-180.ZENG Sheng,JIANG Bowei,DENG Xianshi,et al.Impact tests on model of layered and jointed rock mass[J].Journal of Safety Science and Technology,2016,12(1):176-180.
[5]宋义敏,何爱军,王泽军,等.冲击荷载作用下岩石动态断裂试验研究[J].岩土力学,2015,36(4):965-970.SONG Yimin,HE Aijun,WANG Zejun,et al.Experiment study of the dynamic fractures of rock under impact loading[J].Rock and Soil Mechanics,2015,36(4):965-970.
[6]叶涛,张柱银.动高压冲击下岩石破裂机理及相变研究[J].岩土力学,2007,28(10):2198-2201.YE Tao,ZHANG Zhuyin.Experiment on fracture mechanism of rocks under dynamic high-pressure[J].Rock and Soil Mechanics,2007,28(10):2198-2201.
[7]王道荣,李宏杰,赵巨岩,等.高速冲击下铝锂合金材料断裂强度的实验研究[C]∥第六届全国爆炸力学实验技术学术会议论文集.安徽:中国力学学会爆炸力学实验技术专业组,2011:337-341.
[8]马江锋,张秀丽,焦玉勇,等.用非连续变形分析方法模拟冲击荷载作用下巴西圆盘的破坏过程[J].岩石力学与工程学报,2015,34(9):1805-1814.MA Jiangfeng,ZHANG Xiuli,JIAO Yuyong,et al.Numerical simulation of failure of brazilian disc specimen under dynamic loading using discontinuous deformation analysis method[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(9):1805-1814.
[9] OBOLTAJoko, SHARMAABAkanshu. Numerical simulation of reinforced concrete beams with different shear reinforcements under dynamic impact loads[J].International Journal of Impact Engineering,2011,8:940-950.
[10] HUANG S,LIU Q,CHENG A,et al.A statistical damage constitutive model under freeze-thaw and loading for rock and its engineering application[J].Cold Regions Science and Technology,2017,10:142-150.
[11] YOSSEF H H,FENG X,LI S,et al.Tunnel reinforcement in columnar jointed basalts:the role of rock mass anisotropy[J].Tunnelling and Underground Space Technology Incorporating Trenchless Technology Research,2015,46:1-11.
[12]苗胜军,王子木,刘亚运,等.岩石质量模糊综合评价模型及应用[J].中国矿业,2017,26(7):147-150.MIAO Shengjun,WANG Zimu,LIU Yayun,et al.A model for fuzzy comprehensively evaluating rocks quality and its application[J].China Mining Magazine,2017,26(7):147-150.
[13] ZHOU Z,JIANG Y,ZOU Y,et al.Degradation mechanism of rock under impact loadings by integrated investigation on crack and damage development[J].Journal of Central South University,2014,21(12):4646-4652.
[14]陈新,廖志洪,李德建.节理倾角及连通率对岩体强度、变形影响的单轴压缩试验研究[J].岩石力学与工程学报,2011,30(4):781-789.CHEN Xin,LIAO Zhihong,LI Dejian.Experimental study of effects of joint inclination angle and connectivity rate on strength and deformation properties of rock masses under uniaxial compression[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(4):781-789.
[15]栗东平,王超圣,薛东杰,等.单节理抗压强度的数值模拟[J].辽宁工程技术大学学报:自然科学版,2015,32(2):150-154.LI Dongping,WANG Chaosheng,XUE Dongjie,et al.Numerical simulation on compressive strength of single jointed rock mass[J].Journal of Liaoning Technical University:Natural Science,2015,32(2):150-154.
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