摘要
研究目的：高速铁路的修建涉及大量深埋长隧道，施工阶段围岩详细分级时，涉及到一些在对原围岩分级进行修正时的问题，其中，高地应力、高水压的修正是主要要内容。研究结果：提出了高水压下围岩级别的修正，采用[Q]=[BQ]Jw（Jw=0．1～0．05）对基本分级进行修正；TB法在地应力等级划分标准值附近将产生较大的定级误差，现场地应力评价指标研究及其现场获取技术研究是进行施工阶段围岩分级地应力修正的一个有效途径。
Research purposes： A large number of large deep - buried tunnels are to be built for construction of high - speed railways. It is necessary to modify the original grades of some surround rock in the detailed grade determination of the surrounding rock during the construction. The modification of the highland stress and high water pressure is the dominant content of the modification. Research results： The basic grades of surrounding rock under high water pressures can be modified by adopting [ Q ] = [ BQ ] Jw （Jw = 0. 1 ～ 0.05 ）. Serious grade differences may occur near the standard values in the determination of the of the surrounding rock in the construction.
出处
《铁道工程学报》
EI
北大核心
2008年第3期64-67,共4页
Journal of Railway Engineering Society
关键词
高地应力
高水压
铁路隧道
围岩分级
highland stress
high water pressure
railway tunnel
classification of surrounding rock
