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- W797645682 abstract "Trials of a machine capable of demolishing pre-tensioned and post-tensioned structures safely are described. The machine, weighing 4.5 tonne, hangs on three wire straps from a steel-work lifting beam and can be used in both horizontal and vertical directions. A three-phase 7.5 kw motor drives the 300 tonne capacity and 200 mm diameter pointed profile hydraulic ram. Concrete members up to 900 mm thick to be crushed are `pinched' between the ram and two 175 mm diameter steel pins located on the legs of the machine. An unrestrained simply supported inverted T-Beam, 695 mm by 495 mm reinforced with ten 12.8 mm diameter seven-strand tendons originally stressed to 115.5 kn, was used for the tests. The machine worked well near the ends of the 12 M long beam but was ineffectual near the middle where the beam simply flexed. Future modifications to the motor and to the configuration of the machine are outlined. One development would be capable of cutting steel beams up to 610 mm wide. (TRRL)" @default.
- W797645682 created "2016-06-24" @default.
- W797645682 creator A5053596548 @default.
- W797645682 date "1982-02-25" @default.
- W797645682 modified "2023-09-28" @default.
- W797645682 title "VALORI'S NUTCRACKER BREAKS WITH TRADITION" @default.
- W797645682 hasPublicationYear "1982" @default.
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