| 摘要 |
<P>PROBLEM TO BE SOLVED: To find an altitude in a no-live-load state at an arbitrary point in a state in which a live load acts on a bridge. <P>SOLUTION: A total station 10 with an automatic tracking function which is installed outside a bridge measures a collimation target 11 installed at an altitude measurement point continuously for a predetermined time at small time intervals, measures any one of or both of a maximum altitude value Hmax and a minimum altitude value Hmin, and a mean altitude value Have in the measurement time, and substitutes those measured values in a calculation expression, for example, H0=Have+(Hmax-Have)*k, obtained based upon a flexure influence line, for finding an altitude H0 in the no-live-load state using any one of or both of the maximum altitude value Hmax and the minimum altitude value Hmin, the mean altitude value Have, and a constant (k), thereby finding the altitude in the no-live-load state. <P>COPYRIGHT: (C)2012,JPO&INPIT |
