Becho Logo

what's new

Becho Incorporated is always looking for the most efficient way to get the job done in a timely manner for your construction needs.

Oscillator Technology

Oscillators have been used in Europe for decades to spin or ratchet deep foundation steel casings into hard ground, we our now seeing the need for this drilling technology in the United States. Becho Incorporated has committed itself to this technology and is the owner and operator of the only oscillator in Utah and one of the leaders in the United States.

U.S contractors traditionally use conventional crane-mounted rigs to drill uncased shafts, then if need they use slurry to stabilize the hole, while using an oscillator the contractor is able to case while drilling using powerful hydraulically driven oscillators and rotators. Both methods have ideal applications depending on soil variables, but the safety and efficiency of casing holes is clearly an advantage to the conventional method. Casing shafts decrease concrete outbreak by up to 50%, climate voids, make for a cleaner safer work site, and reduce the risk of project delays. It is also more environmentally attractive than slurry.

Casing the hole does two things: it controls the concrete pour, and protects the hole. Interest in the use of oscillators is growing through the western states, not only because it's the safer way, but because of the existence of a wide variety of differing subsurface conditions. Using the oscillator, the casing is fit with cutting teeth that are able to core through old pilings, riprap and other obstructions. Oscillators are ideal in order to cope with difficult and/or unstable ground conditions.

While boring, a recoverable steel casing is pushed into the ground. In order to avoid any penetration of soil or water into the casing, a soil plug is maintained inside the casing during boring. An excavating tool, generally referred to as a bucket, auger or core barrel, mounted on a crane. In case of high water table, the hydrostatic excess pressure can be maintained inside the casing in order to avoid decompression or erosion of the soil surrounding the pile. Not so with the conventional crane-mounted method of drilling uncased shafts. The pile is concreted using a tremie pipe to avoid concrete segregation. The use of a tremie pipe is possible even under water.