| 摘要 |
A method and apparatus for installing a pipe casing (18) underground without a trench for distances up to 400 feet with pipe casing up to 168 inches in diameter. The system uses a modified high energy piling hammer (12) to mobilize the energy to drive the casings (18). The pile driving hammer (12) is held against the pipe casing (18) to be driven with a force equal to the reactional force of the hammer (12) during recharching of the hammer's system. A helmet (40) and cutting head (20) increase operational capabilities.
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