This method is used for installation of metal microtunnels with minimal displacement of soil. This method is especially practical for installation of underground communications in casings beneath busy motorways, railroads or pedestrian routes, and buildings.
1. A pneumatic unit is placed in a hole dug by the site on which a microtunnel will be made; the unit rams a heavy-wall metal pipe in required place in required direction by means of compressed air. The inside of the rammed pipe is cleaned with the help of compressed air and water.
Grundoram
|
max length* (m) |
max depth* (m) |
max diameter (mm) |
| 50 |
unlimited |
800 |
Mini Olimp (ramming method)
|
max length* (m) |
max depth* (m) |
max diameter (mm) |
| 40 |
unlimited |
325 |
2. Tools bore a tunnel at the required depth in required direction and drive in a metal or plastic pipe. The tool is used on sites where vibration is not allowed.
RPB 300A (boring method)
|
max length* (m) |
max depth* (m) |
max diameter (mm) |
| 40 |
unlimited |
325 |
* single locating of equipment
Technological features
|
long distances (up to 300 m) |
|
|
minimal distances (up to 40 m) |
|
|
without displacement of soil |
|
|
minimal digging of soil |
|
|
complicated access sites |
|
|
multiple underground utilities |
Site features
|
underground |
|
|
underneath water bodies |
|
|
underneath roadways |
|
|
underneath railroads |
|
|
underneath above-ground structures |
|
|
underneath planted sites |
Application areas
|
communication networks |
|
|
water-supply networks |
|
|
wastewater networks |
|
|
railways |
|
|
motorways |
|
|
electric power networks |
|
|
pipeline renovation |
|
|
land improvement |
|
used |
|
|
possible use (when required under special conditions) |
|
|
not used |
|
