岩体风化卸荷数值判别

doi:10.13278/j.cnki.jjuese.20180170

Abstract

Abstract: Water resources and hydropower projects often involve rock mass foundation and rock slope. Weathering and unloading can lead to rock disintegration. The impact on construction work is remarkable. The P-wave velocity of rock mass and the rebound value of rock are measured along the exploratory waist line, and then they are clustered and analyzed respectively,vand further are divided into different data groups. According to the different essential characteristics of weathering and unloading,vits P-wave velocity has gradient difference, no matter it is weathered or unloaded; however, the rebound value has a gradient difference only in weathered rock mass, but not in unloaded rock mass. Using the mathematical model of Boltzmann function,vthe authors analyzed the longitudinal wave velocity and rebound value by fitting calculation, made a numerical discrimination on weathering and unloading of rock mass, and further quantitatively divided the weathering zone and unloading zone, and determine their boundaries. The application results show that the numerical discrimination method is easy to operate,vcan scientifically and objectively distinguish the weathering and unloading,vcan accurately determine the boundaries of the weathering belt or the unloading zone,vand can solve engineering geology problems quantitatively.

Key words: numerical discrimination, P-wave velocity, rebound value, Boltzmann function, quantitative division

CLC Number:

P642.3

Li Lei, Wang Guijun, Zhang Yi, Wang Guanlin. Numerical Discrimination of Weathering and Unloading of Rock Mass[J].Journal of Jilin University(Earth Science Edition), 2018, 48(5): 1532-1538.

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