FIELD: construction.
SUBSTANCE: pipe is constructed in several stages. At the first stage the pipe shaft is concreted with simultaneous section-by-section build-up of a shaft hoist. Upon completion of pipe shaft concreting the blocks of the cargo cage are rested against a shaft hoist, the working site is dismantled, elements of the tent and device for working site lifting, dimensions of which prevent passage of the device in the assembled form via the outlet diameter of the pipe shaft cut, the dismantled elements are lowered in the cargo cage along the shaft hoist. The device for lifting of the working site is lowered along the shaft hoist down, from which angular stands are dismantled with adjacent crossbars and struts, and flexible links to zero elevation, in partially dismantled angular cells of the shaft hoist they install diagonal crossbars for increasing its stiffness; at the bottom the device is fully dismantled. Movement of the self-lifting device is carried out by four specified hoists as ropes are wound or unwound from hoist drums, at the same time to increase weight-lifting capacity of hoists, the rope of each hoist is directed to the assembly block and is returned to the self-lifting device on the frame. The assembly block with its hook with a latch is suspended onto a ring of a double-branch chain sling, each branch of which is fixed on a quick-detachable yoke, installed on the coupling of the shaft hoist stand. A lining site is suspended to the self-lifting device, from which heat insulation, lining works are performed, as well as anti-corrosion protection. When arranging another layer of lining, during lifting of the self-lifting device they restore flexible links and angular stands, and adjacent crossbars and struts under the lining site. When lowering the device, to prepare for arrangement of another layer under the lining site they dismantle angular stands, crossbars, struts and flexible links. After lining the blocks of the cargo cage are fixed on the cut of the pipe shaft. Cells of the shaft hoist are covered by shields installed onto crossbars, from which it is dismantled to zero elevation. Afterwards the self-lifting device is dismantled.
EFFECT: reduced metal intensity, labour intensiveness, higher quality of works and safety of labour, improved labour conditions.
4 cl, 9 dwg
