摘要
本文总结了小净距隧道在不同陡倾结构面的角度及陡倾结构面的组合下的位移和应力特点,根据这些特点提出了采取在中间岩体注浆和进行预应力锚杆施工等措施能够有效提高围岩的承载能力,提出通过对围岩塑性区、变形量以及应力集中程度进行预测来对围岩的稳定性进行监测、控制,并根据围岩的控制原则从开挖方式、加固方式、爆破选择等角度提出了对围岩稳定性的控制技术。
This paper summarizes the characteristics of displacement and stress of small clear distance tunnelunder different angles and combinations of steep-dip structural planes,According to these characteristics,itis suggested that grouting in the middle rock mass and construction of prestressed anchor bolt can effectivelyimprove the bearing capacity of surrounding rock,The stability of surrounding rock is monitored andcontrolled by predicting the plastic zone,deformation and stress concentration of surrounding rock,andaccording to the control principle of surrounding rock,the control technology of surrounding rock stability isput forward from the angles of excavation method,reinforcement method and blasting choice.
作者
郝永明
HAO Yongming(China Communication Road and Bridge Construction Co.,Ltd.,Beijing,100027 China;China Communication South Road and Bridge Construction Co.,Ltd.,Beijing,100027 China)
出处
《科技创新导报》
2021年第3期11-13,共3页
Science and Technology Innovation Herald
关键词
小净距隧道
围岩
承载能力
加固
控制原则
Small clear distance tunnel
The surrounding rock
Carrying capacity
Reinforcement
Controlprinciple
