The primary functions and advantages of pipe canopy pipes:

Beam Arch Effect: The initial construction of a shield to support the surrounding rock in front of the face and the surrounding rock behind as fulcrums, forming a beam-like structure. These two structures create a shell-like support for the tunnel contour, effectively controlling the loosening and collapse of the surrounding rock.

Strengthening Effect: The grouting slurry is pressurized through the pipe wall holes into the rock fissures, bonding and solidifying the loose rock mass, thereby enhancing the physical and mechanical properties of the soft (fractured) surrounding rock and improving its self-supporting capacity. The purpose is to reinforce the surrounding rock around the pipe shed.

Ring groove effect: The shock wave propagation and gas expansion from the explosion at the working surface are reflected, absorbed, or diffracted after encountering the dense ring grooves of the pipe shed, significantly reducing the degree of damage and disturbance to the surrounding rock and tensile waves. Scope.

Ensure Construction Safety: The pipe shed has a high stiffness. In case of another landslide during construction, the collapsed slag will fall onto the rocky debris above the pipe shed, providing a cushioning effect. Even if the pipe shed is unstable, its destruction will be relatively slow.