摘要
鉴于四川省长大公路隧道的大变形特征,通过现场技术分析和现场试验研究了控制公路隧道软岩大变形的措施。定量分析表明,使用长螺栓和高强度初期支护,隧道的沉积岩,围岩的收敛性和围岩的等效塑性变形均有一定程度的降低。经高强度刚性支撑、支锚、径向加固注浆、加强锁脚锚杆后,软岩石的变形控制效果很好,但是在地面不会出现异常外观,控制措施是有效的。
In view of large deformation characteristics of long and large highway tunnel in Sichuan province,the measures to control large deformation of soft rock in highway tunnel are studied through field technical analysis and field test. Quantitative analysis shows that using long bolts and high strength primary supports,the sedimentary rocks of the tunnel,the convergence of surrounding rocks and the equivalent plastic deformation of surrounding rocks are reduced to a certain extent. After high strength rigid support,anchor support,radial reinforcement grouting,and reinforced anchor bolt,the deformation control effect of soft rock is very good,but the control measures are effective on the ground and the ground without abnormal appearance.
出处
《建筑技术开发》
2022年第1期95-98,共4页
Building Technology Development
关键词
公路隧道
软岩大变形
收敛性
等效塑性变形
highway tunnel
large deformation of soft rock
convergence
equivalent plastic deformation
