Self-expanding foot locking anchor pipe

The invention belongs to the technical field of tunnel engineering, and relates to a self-expanding foot locking anchor pipe. The self-expanding foot locking anchor pipe is composed of an anchor pipebody, an anchor frame fixing connecting end, a universal joint, a nipple threaded sleeve, a hollow anchor pipe and a self-expanding concrete and expanding activator storage capsule, wherein the hollowanchor pipe is provided with a protective sleeve and a small piece. The self-expanding foot locking anchor pipe has simple installation, only the mechanical connection with a steel arch without welding can solve problems, the air pollution in a tunnel is effectively reduced, and the construction progress is speeded up. According to the self-expanding foot locking anchor pipe, the installation fault tolerance and pre-tightness can be improved through a self-tightening nipple and the universal joint, and positioning is simple, and the force transmission effect is clear. The modularization of adevice is completed through