摘要
研究目的:岩石(体)纵波速度、抗压强度是评价岩体强度、稳定性、围岩分级十分重要的指标。本文利用大量试验数据,统计各种地层岩石纵波速度、抗压强度平均值,从宏观上回归分析岩石(体)纵波速度与抗压强度的关系,建立二者相互预测的宏观定量模型,这对评价岩体质量、隧道围岩分级、节省测试费用、缩短工期、检验测试结果可靠性具有重要实际意义。研究结论:(1)岩石(体)致密、坚硬、完整、新鲜,纵波速度就高;反之,岩石(体)质软、风化严重、含水多、结构面多、孔隙多,纵波速度就低。(2)岩石纵波速度与岩石单轴抗压强度的立方根成正比;岩体纵波速度与岩石单轴抗压强度的立方根和岩体完整性指数的平方根之积成正比。(3)岩石(体)纵波速度与单轴抗压强度的宏观定量关系模型可信度较高。
Research purposes： The vertical wave velocity and compressive strength of the rock （rock mass） are the very important indexes for appraising the rock mass strength, the slope stability and surrounding rock classification. In this paper, based on the tests data, the statistics is made for the average values of the vertical wave velocity and compressive strength of the rocks of all kinds of stratum, the macroscopic relation between the vertical wave velocity and compressive strength of the rocks is analyzed, and the model is established for the macrocopic quantitative relation between them. All these are crucial to appraising the rock mass quality, classification of the surrounding rock of tunnel, saving the test cost, shortening project construction time and checking the reliability of the test result. Research conclusions： （1） When the rock （rock mass） is dense, hardy, complete and fresh, its vertical wave velocity is big, otherwise its vertical wave velocity is low when the rock （rock mass） is weak, serious weathering, watery and dissected. （2） The vertical wave velocity of the rock is directly proportional to the cube root of rock compressive strength, and the vertical wave velocity of the rock mass is directly proportional to the cube root of the compressive strength of rock mass and the square root of the integrity index of rock mass. （3） The practices show the model for the macroscopic quantitative relation between the vertical wave velocity and compressive strength of rock （rock mass） is reliable.
出处
《铁道工程学报》
EI
北大核心
2011年第10期6-9,共4页
Journal of Railway Engineering Society
关键词
岩石(体)
纵波速度
抗压强度
定量关系
rock （rock mass）
vertical wave velocity
compressive strength
quantitative relation
