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The term hand tunneling is used to describe the type of man-entry tunneling in which a person excavates the face of the tunneling with a hand tool.
Preferred Soil: Dry Clay, Wet Clay, Dry Sand, Dry Silt
Step 1 - Hand tunneling requires a tunnel shaft.
Tunnel Shaft |
Face of Tunnel |
Step 2 - This process is begun by a person excavating the face of the tunnel in the contour of the primary liner. The spoil is then loaded into buckets and the excavated material is transported to the shaft.
Step 3 - The pipe is jacked into place, or the tunnel liner is installed. This process is repeated until the tunnel is complete.
Step 4 - At periodic intervals the line and grade of the tunnel is checked using a construction laser.
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