Steel sheath percussion jacking. An effective technique for soft floors.
The percussion jacking technique consists of driving a steel casing into the ground, horizontally or with a slope, beneath an obstacle.
The steel sheath is darkened by percussion using a pneumatic hammer. Once the liner has covered the required distance, its contents can be emptied using a mechanical auger, either compressed air or water. The pipes can then be inserted inside the steel sheath. If required, the annular space between the steel liner and the pipe can be filled with urethane or concrete. The pipe can also be centered with spacers and capped.
Prerequisites for the use of steel shaft percussion jacking.
As in the case of horizontal drilling, a starter well and an arrival well must be installed at the required depth. This type of structure must be straight and can be built with a slope. Shaft dimensions vary from project to project, depending on pipe length and diameter, depth, type of wall support and soil conditions. The entry well must have a dry bottom and must respect the axis of the borehole. The use of clean stone in the last six inches is necessary.
Ideally, steel casing percussion jacking should be used on loose soils free of blocky obstacles (sand, silt, clay and gravel).
Equipment for all types of work requiring percussive steel shaft jacking.
We have a wide range of pneumatic hammers. Depending on the diameter of the pipe to be installed, we select the appropriate steel liner, as well as the pneumatic hammer with the required capabilities.
We can drill holes with diameters ranging from 4 to 144 inches and lengths of over 300 feet when conditions are right.
Extensive field experience
Since 1988, we’ve used percussive steel shaft sinking on numerous occasions for a wide range of projects, from the simplest to the most challenging. We have successfully installed gas, water, electricity, sewer and fiber optic lines. Thanks to our adapted machinery, we can pass under numerous obstacles as varied as :
Roads and freeways
Railroads
Rivers
Buildings
Please note: Beforehand, boreholes must be drilled so that we can determine the feasibility and trajectory of the borehole. Contact us for more information.
