Multiplex injection-drilling for buildings preserving - uses drilling of several holes simultaneously in stone etc. and sealing them to prevent fluid from escaping

摘要

The method for buildings or monuments preservation drives several boreholes in appropriate locations and inserts probes into the holes. All the bore holes are connected to the pressure apparatus directly, or by means of long polyamide high-pressure pipes to the main pipe. The drill is centrally controlled and considerably cuts down working time by simultaneous drilling. The specific gravity of the enclosed liquid exerts a corresponding pressure. The injected fluid is prevented from outflow by suitable surface seals.