摘要
通过工程钻探、工程物探及现场水文地质试验等多种勘察手段,对拟建隧道场地进行了详细勘察,重点评价了围岩石英砂岩的透水性、岩石质量和岩体基本质量的工程特性。结果表明:岩体最完整~完整段微风化岩渗透系数为6.8×10^(-4)m/d~4.8×10^(-3)m/d,为微透水性。中风化岩RQD平均值6.71%,微风化岩RQD平均值12.58%,岩石质量等级属极差。隧道设计里程K0+187.5~K0+287.92和K0+459.01~K0+502.50段岩体基本质量等级为Ⅵ,K0+287.92~K0+459.01段岩体基本质量等级为Ⅴ。该勘察成果为后续建设的工程设计和施工提供重要依据和建议。
In this paper,through multiple investigation methods,such as engineering drilling,engineering geophysical prospecting and on-site hydrogeological tests,a detailed survey of the proposed tunnel site was carried out.This paper focused on the evaluation of the engineering characteristics of the permeability of surrounding quartz sandstone,rock quality and rock mass basic quality.The results show that the permeability coefficient of the slightly weathered rock in the most complete to complete section of the rock mass is 4.7×10^(-3)m/d~6.8×10^(-4)m/d,which is slightly water-permeable.The average RQD of moderately weathered rocks is 6.71%,and the average RQD of slightly weathered rocks is 12.58%.The rocks quality is extremely poor.The rock mass basic quality of K0+187.5~K0+287.92 and K0+459.01~K0+502.50 of the tunnel design mileage isⅥ,and the rock mass basic quality of K0+287.92~K0+459.01 isⅤ.The survey results provide important basis and suggestions for the engineering design and construction of subsequent construction.
作者
贾海鹏
JIA Haipeng(SHENZHEN GEOTECHNICAL INVESTIGATION&SURVEYING INSTTUTE(GROUP)Co.,Ltd.,Shenzhen 518028,China)
出处
《城市勘测》
2023年第6期193-196,共4页
Urban Geotechnical Investigation & Surveying
关键词
多种勘察手段
围岩透水性
岩石质量
岩体基本质量
隧道
multiple investigation methods
permeability of surrounding rock
rock quality
rock mass basic quality
tunnel
