Altitude measurement method at the time of the live load non loading condition in the bridge

摘要

P 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. PSOLUTION: 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 and H0=Have+ (Hmax-Have) *k, obtained based upon a flexure influence line and 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 HminThe mean altitude value Have and a constant (k), thereby finding the altitude in the no-live-load state. PCOPYRIGHT: (C)2012 and JPO& INPIT