摘要
对压力拱拱体进行定义,通过应力分析确定拱体的边界,并用数值分析方法对拱进行分析.分析结果表明,岩性和围岩中水平应力对围岩中应力拱的位置和形状有很大影响,围岩强度越高,拱体越靠近硐室,形状陡峭;围岩强度较低者,拱体则远离硐室,形状平缓.足够的水平应力是压力拱成拱必不可少的条件.
The pressure arch was defined, and its boundary was determined based on stress analysis. The numerical analysis of the pressure arch shows that the rock properties and horizontal stress in surrounding rocks are of great influences on the location and shape of the pressure arch, and that in high-strength surrounding rock, the pressure arch with steep shape is close to the opening, while in low-strength surrounding rock, the pressure arch with gentle shape is far away from the opening. It is also concluded that stresses large enough in horizontal direction are necessary for the formation of a pressure arch.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2005年第3期314-317,共4页
Journal of Hohai University(Natural Sciences)
基金
国家"973"计划资助项目(2002CB412701)
关键词
地下工程
压力拱
岩性
水平应力
硐室稳定
underground engineering
pressure arch
roch properties
horizontal stress
stability of opening
