Anchor rod construction method for tunnel excavation primary support system

The invention discloses an anchor rod construction method for a tunnel excavation primary support system. The method comprises the following steps: 1, primarily spraying concrete; 2, mounting a steel arch; 3, hollow steel pipe installation; and fourthly, system anchor rods are installed. The method is simple in step and reasonable in design so that the system anchor rod can be installed after re-shotcreting, the problems existing when the system anchor rod is installed after primary support are avoided, and the problems that after the system anchor rod is installed, a re-shotcreting concrete spraying layer leaks out of an extending part, a primary support face is uneven, and a large amount of re-shotcreting is needed can be avoided. Or a large number of anchor rod steel bar heads are cut off manually. 本发明公开了一种隧道开挖初期支护系统锚杆施工方法，该方法包括以下步骤：一、初喷喷混凝土；二、钢拱架安装；三、中空钢管安装；四、系统锚杆安装。本发明方法步骤简单，设计合理，以使系统锚杆在复喷混凝土后进行安装，避免初期支护后安装系统锚杆安装时存在的问题，还能避免系统锚杆安装后伸出部漏出复喷混凝土喷射层，初期支护面不平整，需要大量复喷，或人工切除大量锚杆钢筋头的工作。