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.
- 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.
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.
Using the MNB-50 equipment for a pipeline construction, followed by using the OR-1.5 formwork
for the reinforced concrete well installation: description of stages
The first belt of the OR-1.5 formwork is placed on the axis of an old pipeline that must be replaced, or the new pipeline must be constructed, with the pipe-jacking method used for this purpose.
Soil excavation is carried out within the formwork gradually sinking it to the designed depth.
The MNB-50 equipment is mounted in the OR-1.5 formwork.
Works are carried out for pipeline replacement or laying from the OR-1.5 formwork.
Construction of the reinforced concrete well, Ø1500 mm
The load-bearing beam, resting on the reinforced concrete ring, applies force through the set of hydraulic cylinders to press the formwork up from soil by one belt height.