COLLAPSIBLE MOBILE FORMWORK

A unique auxiliary system for construction of new pipelines and replacement of old pipelines by new ones, followed by installation of reinforced concrete rings. Application: The OR-1.5 formwork is designed for operation as a site for the equipment of the MNB-50 machine and for protection of personnel and equipment against soil collapse The inner dimensions of the formwork are designed for installation of reinforced concrete rings for wells, having diameters up to 1.5 m. The OR-1.5 formwork provides safety of operation and minimal scope of excavations for work at high depth. Operation principle Reinforced concrete rings are installed inside the formwork. Two hydraulic cylinders, with the load-bearing beam resting on a reinforced concrete ring, are used to lift the formwork belts. With the formwork belts extension, fill-up soil is used to fill resulting spaces between rings and the formwork. This is followed by installation of the next ring. Then the procedure is repeated.