摘要
以镜像法和渗流力学理论为基础,推导了半无限平面双孔近距平行隧道稳定渗流场的解析解,并与数值解进行了对比验证。对2个平行隧道间距,注浆圈和初期支护的渗透系数、厚度等参数对隧道涌水量和初期支护后水压力的影响进行了分析。研究结果表明:随着2个隧道水平间距的增大,隧道的涌水量和衬砌后水压力逐渐增大;当隧道中心水平间距大于隧道半径的20倍时,水平间距的影响几乎可以忽略不计;随着其中一个隧道埋深的逐渐增大,该隧道涌水量和初期支护后水压力逐渐减小,而邻近隧道涌水量和初期支护后水压力先减小后增大;随着隧道注浆圈渗透系数的减小和注浆圈厚度的增大,隧道涌水量和初期支护后水压力均逐渐减小;随着隧道初期支护渗透系数的减小和初期支护厚度的增大,隧道涌水量逐渐减小,初期支护后水压力却逐渐增大。
Based on image method and theory of seepage mechanics,the analytical solution for steady seepage field of twin-parallel tunnels in semi-infinite plane was derived,and was compared and verified with the numerical solution.An analysis was made on the effects of the parameters of twin-parallel tunnels,such as tunnel space,thickness and permeability quotient of grouting circle and primary support,on the water inflow and water pressure under the primary support.The research results indicated that water inflow and water pressure under the primary support increased gradually with the increase of horizontal spacing between the two tunnels.When the horizontal distance between the tunnel centers was 20 times larger than the radius of the tunnel,the influence of the horizontal spacing almost could be neglected.With the gradual increase of burial depth of one of twin-parallel tunnels,the water inflow and water pressure under primary support for this tunnel decreased,while the water inflow and water pressure under primary support for the other adjacent tunnel decreased first and then increased.With the decrease of permeability quotient and the increase of thickness of the grouting circle,the water inflow and water pressure under primary support gradually decreased.With the decrease of permeability quotient and the increase of thickness of the primary support,the water inflow gradually decreased,while the water pressure under the primary support gradually increased.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2017年第1期125-131,共7页
Journal of the China Railway Society
基金
国家自然科学基金(51478118)
福建省教育厅科技项目(JA14214)
福建工程学院基金项目(GY-Z13118)
关键词
双孔平行隧道
镜像法
渗流力学
渗流场解析
涌水量
twin-parallel tunnels
image method
seepage mechanics
analytical solution of seepage field
water inflow
