摘要
文章以青岛地铁工程为依托,开展了青岛地铁岩质围岩基本分级细化体系研究,得到了各级围岩所对应的岩体弹性纵波波速及岩芯采取率、岩芯形态。依据研究成果建立了包括定性鉴别、围岩弹性纵波速度、岩芯状况在内的围岩分级细化体系,并通过分级体系适用性分析表明:该分级体系具有较高的符合率且围岩级别偏差没有超过一个亚级;新分级体系有利于减小围岩不同等级间的设计参数的跨度,既保证设计安全,又避免设计浪费;降低了围岩分级过程中的不确定性,同时也丰富了我国岩质围岩分级体系。
Based on the Qingdao metro project, a sub-classification system for rocky surrounding rock is studied, and elastic longitudinal wave velocities, core recovery percentages and forms of rock cores corresponding to various grades of rock masses are obtained. In light of the research results, a sub-classification system, which includes qualitative discrimination, elastic longitudinal wave velocity and rock core condition, is established. Applicability analysis of the sub-classification shows it has a good coincidence rate and the deviation of the rock mass grade is less than one sub-classification; the new classification system is favorable for reducing the span of design parameters for rock masses of different grades, which guarantees design safety and avoids waste. Uncertainty regarding rock mass classification decreases and the grading system for rocky surrounding rock is enriched.
出处
《现代隧道技术》
EI
CSCD
北大核心
2018年第1期59-64,共6页
Modern Tunnelling Technology
基金
中央高校基本科研业务费专项资金(SWJTU11ZT33)
关键词
围岩
分级细化体系
岩体弹性纵波波速
岩芯采取率
岩芯形态
Surrounding rock
Sub-classification system
Elastic longitudinal wave velocity of surrounding rock
Core recovery percentage
Form of rock core
