岩体风化卸荷数值判别

doi:10.13278/j.cnki.jjuese.20180170

吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (5): 1532-1538.doi: 10.13278/j.cnki.jjuese.20180170

• 中国水利学会勘测专业委员会专栏 • 上一篇

岩体风化卸荷数值判别

李雷, 王贵军, 张一, 王冠霖

黄河勘测规划设计有限公司, 郑州 450003

收稿日期:2018-06-27 发布日期:2018-11-20
作者简介:李雷(1969-),男,高级工程师,主要从事水利水电工程地质勘察工作,E-mail:yrcclilei@126.com
基金资助:
陕西省水利科研项目（2017slkj-24）

Numerical Discrimination of Weathering and Unloading of Rock Mass

Li Lei, Wang Guijun, Zhang Yi, Wang Guanlin

Yellow River Engineering Consulting Co., Ltd., Zhengzhou 450003, China

Received:2018-06-27 Published:2018-11-20
Supported by:
Supported by Water Research Project in Shaanxi Province(2017slkj-24)

摘要/Abstract

摘要： 风化作用和卸荷作用都会导致岩体破碎。在探硐腰线上测试岩体的纵波速度和岩石的回弹值，并对测得的纵波速度和回弹值分别进行聚类分析，分成不同的数据组。根据风化与卸荷的本质特征，无论岩体风化还是卸荷，其纵波速度都存在级差；但风化岩体回弹值存在级差，卸荷岩体回弹值不存在级差。利用玻尔兹曼函数数学模型，通过拟合计算分析纵波速度和回弹值，对岩体风化与卸荷进行数值判别，并进一步定量划分风化带与卸荷带，确定带的界线。实例应用结果表明：该数值判别方法操作简易，能科学客观地判别风化与卸荷，精确确定风化带与卸荷带的界线，定量解决工程地质问题。

关键词: 数值判别, 纵波速度, 回弹值, 玻尔兹曼函数, 定量划分

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

中图分类号:

P642.3

李雷, 王贵军, 张一, 王冠霖. 岩体风化卸荷数值判别[J]. 吉林大学学报(地球科学版), 2018, 48(5): 1532-1538.

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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岩体风化卸荷数值判别

Numerical Discrimination of Weathering and Unloading of Rock Mass

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