FIELD: construction.
SUBSTANCE: invention relates to the field of making prestressed building structures, in particular to methods and devices for tensioning of stressed elements. In order to realise thermal method of stressed elements tensioning, a mount site is provided, with two force fixed thrusts - the first and second ones - arranged on it with slots, and downstream the second one - a movable force thrust is arranged, to move which, a mechanical device is used, which is fixed to the second stable and movable force thrusts. Stressed elements of specified length with anchors at ends are installed in slots of all force thrusts and are fixed to the first stable and movable force thrusts. Besides heat insulation heat-resistant jackets are placed on all stressed elements by length, between fixed force thrusts as shells of closed cross section, and a closed space is created inside of them, required for heating of stressed elements. Heating system is connected, stressed elements are heated and obtain temperature elongations. In order to fix these elongations, movable force thrust is moved with the help of mechanical device, and when heating temperature of stressed elements achieves its maximum - T°C=350°C -400°C, displacement of movable force thrust is also brought to maximum specified elongation, and movable force thrust itself at the same time connects limiter of its travel - electric steward, which disconnects also a system of stressed elements heating. After cooling stressed elements obtain previously specified stress. Then heat-insulating heat-resistant jackets-shells are removed from them and used further repeatedly, and the stressed elements themselves are applied in prestressed building structures.
EFFECT: development of efficient method for tensioning of stressed building structures.
2 cl, 5 dwg
