摘要
通过对不同断面形式、不同尺寸、不同埋深下的节理岩体隧洞进行分析研究,模拟研究了节理岩体隧洞围岩位移受断面尺寸影响的规律,其中隧洞断面形式考虑了城门洞形、正方形、圆形3种。结果表明:一般情况下,在隧洞埋深或断面尺寸增大时,围岩关键点位移增大;当隧洞埋深与断面尺寸均增大时,围岩关键点位移增大更为显著;在相同埋深下,围岩关键点位移随隧洞断面尺寸的增大而增大;在仅埋深变化和仅隧洞断面尺寸变化时,洞底关键点最大位移可能相同,这种情况发生的概率很小且只发生在洞底部位;正方形隧洞受断面尺寸影响最大,而洞底是受断面尺寸影响最小的部位。
The displacement response rule of joint tunnel surrounding rock was simulated by changing the tunnel cross size, the tunnel had different cross forms and sizes and they were buried in different depths. The horseshoe form, square form and round form were considered. The results show that ： as a general rule, the displacement of the tunnel surrounding rock increases with the increase of buried depth or section size. And when these two factors increase, the displacement increases relatively remarkable. The trend is showed that the changing rate of tunnel surrounding rock dis- placement enlarges with the section size aggrandizing. The maximum displacement of the key point could happen in the floor of the tunnel though the probability is small. The influence of square tunnel affected by the section size is the largest and the bottom of the tunnel is the smallest.
出处
《人民黄河》
CAS
北大核心
2013年第8期114-115,119,共3页
Yellow River
基金
国家自然科学基金资助项目(41272325)
山东省优秀中青年科学家科研奖励基金资助项目(BS2011NJ012)
关键词
节理岩体隧洞
尺寸效应
离散元法
埋深
断面尺寸
稳定性
joint rock tunnel
scale effect
discrete element method
buried depth
section size
stability
