| 摘要 |
<p>A method of padding a trench (12) includes the steps of automatically gathering at least a portion of spoil (74) with a padding machine (10) from the berm (8) of a trench (12), automatically pulverizing at least part of the spoil (74) to form a pulverized material (82), and automatically conveying the pulverized material (82) to the trench. The gathered material can be separated into at least two grades of material, only one of the grades of material (78) being pulverized, another of the grades of material (76) being returned to the berm (8). The pulverized material can be collected for use as a sandblasting sand.</p> |
