摘要
以隧道监控量测中测定的全长粘结式锚杆轴力为基本参量,针对圆弧形公路隧道,视围岩为弹塑性介质并在轴对称条件下,考虑锚杆与围岩共同变形,推导了锚杆最大轴力与围岩塑性区半径及松动区半径的关系式,可分析判断支护条件下围岩稳定状态,算例分析表明,该方法正确可行。
For circular arc road tunnel, based on the measured axial force of fully grouted rock belts in monitoring and measurement of the tunnel, considering the surrounding rocks as elastic-plastic medium under axisymmetrical conditions and supposing that the rock belts deformed jointly with the surrqunding rocks, then the relation between the maximum axial force of rock belts and radius of plastic and loose areas of the rock around is deduced; it could be used to analyse and judge stability of surrounding rock with supports. The analysis of examples indicated that this method is practicable and feasible.
出处
《地下空间与工程学报》
CSCD
2008年第6期1023-1026,共4页
Chinese Journal of Underground Space and Engineering
关键词
公路隧道
全长粘结式锚杆
锚杆轴力
解析式
road tunnel
fully grouted rock belts
axial force of rock belt
analytic expression
