METHOD AND DEVICE FOR PRODUCING SILLS IN CIRCULAR PITS

摘要

The invention relates to a method of producing sills or inverted domes in circular pits. The inventive method is characterised in that it comprises the following steps consisting in: lowering a bag of elastic material to the base of the pit, said bag having an essentially cylindrical or cylindrical-conical closed form; inflating the bag with the introduction of a suitable fluid which is less dense than concrete, preferably a liquid bentonite, such that the walls of the bag come into contact with the walls of the base of the pit and adapt thereto; and filling the bag with concrete by moving the fluid with which the bag was inflated. The invention also relates to the device used to perform said method.