| 摘要 |
A method for shoring a building foundation. A hole is excavated in the proximity of the foundation for providing access to a downwardly-directed portion of the foundation. A fitting is slid over a pipe having a drill bit mounted thereon. The pipe is placed in the hole and rotated to create a bore until the bit encounters a sub-surface rock formation. The fitting is engaged against the downwardly-directed portion of the foundation and is urged upwardly relative to the pipe initially to load test each pier and subsequently until the foundation is raised to a selected level. After equalizing the force on each pier, the fitting is then welded to the pipe. The drill bit includes a substantially planar bit member having a U-shaped notch cut therein with a pipe received within the notch. Two additional bit members are mounted on the pipe with all of the bit members having lower edges which are coated with tungsten carbide.
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