CONSTRUCTION OF WELLS DRILLED WITH WATER SPOUT OR AIR BLAST WITH SIMULTANEOUS SIDEWISE SUPPORT

摘要

The area to which the invention relates is Hydrogeology. The problem that is being solved is drilling of large diameter wells with water or air jet in unbound or semi-bound rock mass (sand, gravel, clayey-argillaceous sand, clayey gravel and clay) and simultaneous sidewise support with a concrete ring. The core of solution is in the conic structure of the lower edge of the first ring (1) where the jets (13) are arranged at a certain angle. The pipes (14) which are implemented through the concrete have the connections for water or air supply on the inner side of the ring. The working principle comes down to soil erosion with water/air jets and eddy currents beneath the cone ring, conical deposition of the particles at the bottom Gust like sugar stirred in a cup) and ejection of material using the pumps with suction pipes. With this procedure the support beneath the ring is being removed and it gravitationally falls into the free space giving to the well a sidewise support. Than a new concrete ring is being added from the terrain surface. Unlimited enlargement of the well diamereter and even double filtration are possible in specific conditions.Key words: large diameter well, concrete ring, drilling with a water or air jet.