Bearing section reaction force measurement manner null at time of traveling application of long span

摘要

PURPOSE:To enhance the safety of an installation work for a long span beam by fitting a strain gauge to a rail for measuring and displaying the load fluctuation of the beam during a travel, when a beam having wheels at both support end sections is made to travel along the rail. CONSTITUTION:Both end support sections 2 of a long span beam 1 are provided with wheels 6 in horizontal and vertical directions. Then, rails 5 and 5a are laid on the bottom and wall sections of a U-shaped wall 4 on a foundation structure 3. The beam 1 is placed on the rails 5 and 5a via the wheels 6, and made capable of travelling under a traction force by a jack device 10. Thereafter, strain gauges 7 are fitted to the webs of the rails 5 and 5a, and the measurement values thereof are calculated by a personal computer 12, thereby enabling the load of the beam 1 to be displayed on a CRT screen 13. In this state, the strain of the rails 5 and 5a generated during the travel of the beam 1 is measured and converted to the reaction of the support sections 2 via the personal computer 12 for display on the CRT screen 13. According to the aforesaid construction, a load balance and a dangerous load can be detected, and the degree of safety can be immediately evaluated.