| 摘要 |
The earth boring machine includes a stationary horizontally disposed frame with guide tracks to straddle a trench next to a pavement. A shaft for a drill bit, supported under the frame, is driven by a motor mounted on a carriage riding on the guide tracks. A pavement aligning member connects to one end of the frame to extend downward over the side of the pavement under which the earth is to be bored. A carriage driver pulls the carriage towards the pavement aligning member and pulls the frame against the side of the pavement in order to enable the drill bit to bore a hole in the earth under the pavement while aligning and clamping the boring machine during the boring operation.
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