| 摘要 |
A method of installing pipelines with minimal removal of soil. A first step involves loosening a ground surface repeatedly inserting and withdrawing a vibrating spade. A second step involves inserting a compactor into the loosened ground surface and compacting the soil to form a narrow open ditch, with minimal removal of soil A third step involves laying pipe in the narrow open ditch.. A fourth step involves closing in the open ditch by collapsing the walls of the ditch.
|
