| 摘要 |
FIELD: construction engineering. SUBSTANCE: first, erected by one of traditional methods (by crane, mast) is lower part of structure 4. Then, affixed to top of lower part at external sides are two rope tackles 5 with one common rope. Rigid structural unit preliminarily enlarged on ground level and consisting of several spacious sections C1, C2, C3, C4 which are rigidly interconnected along one face by two flat hinges 6, and along opposite face by temporary bolts, is raised to vertical position by means of rope tackles and guy hinges 7. Lower movable rollers of rope tackles 5 are connected with lower end of hanging vertical block. Temporary bolts between two upper sections C1 and C2 are removed, leaving hinges 6 in their place. By this way, block is converted into crank mechanism in which crank function is performed by upper block C1, and connecting rod function is performed by rigid block consisting of sections C2, C3, C4. After actuation of electric winch of rope tackles 5 for lifting, lower part of section C4 (slide member) slides along temporary guide members 10 and raises up, and section C1 (crank) after turning through 180 degrees and fixing occupies designed position. Connecting rod hangs on hinges 6. After removing temporary bolts between two upper sections C2 and C3 of connecting rod (hinges 6 remain) all components create new crank mechanism in initial position ready fir initiation of new erection cycle. Last section C4 is erected with the help of false section 8 used in function of last connecting rod. EFFECT: high efficiency. 2 dwg |
