Measuring device and method for vertical displacement and ground surface settlement of large structure body

Abstract

The invention discloses a measuring device and method for vertical displacement and ground surface settlement of a large structure body. The measuring device comprises a plurality of measuring units and a data processing center arranged at a far end; each measuring unit comprises an imaging system, a hydro-static leveling instrument, a datum target, one or more measuring targets and one or more laser distance measuring instruments; and after obtaining measured results of the hydro-static leveling instrument, the laser distance measuring instruments and the imaging system, the data processing center calculates to obtain side wall parameters, top displacement parameters and ground surface settlement parameters of the large structure body according to measured results of a settling probe, the datum targets, the measuring targets and the laser distance measuring instruments. The measuring device overcomes the problem that measuring errors of the system are finally caused by deformation due to the fact that the imaging system bears a load or a mounting foundation of the imaging system is deformed and the like, so that measuring accuracy is improved; and meanwhile, non-disturbance measurement of the ground surface settlement parameters is realized, so that passing of vehicles inside is not affected for large structures such as a tunnel, and therefore, the measuring device has relatively high popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of mechanical measurement, and relates to a displacement and deformation measurement device for large structures, in particular to a self-calibrating remote displacement or deformation measurement device and method. Background technique [0002] Large-scale structures include bridges, dams, tunnels, slopes and housing buildings, etc., and their deformation mainly includes static deformation and dynamic deformation. Short-term deformation caused by wind, temperature, earthquake, traffic load or on-site construction, etc., its parameter measurement plays an important role in the safety assessment and analysis of the target. [0003] For traditional large structures such as bridges, the instruments for deformation detection include dial indicators, dial gauges, accelerometers, levels, and theodolites. At present, these instruments are still widely used in bridge acceptance and regular inspection, but they requ...

AI Technical Summary

Problems solved by technology

The main problem with this type of displacement sensor at present is that the CCD image sensor needs to be used in conjunction with a collimated laser, which increases the complexity of the system

The problem with this solution is: when the measurement system is used in tunnels, caves, etc., both the CCD camera and the measurement target will have displacement and deformation due to the influence of external loads, and because the installation positions of the two are different , the displacement of the measurement target and the CCD camera caused by the external load is different, resulting in a large error in the measurement result, which affects the measurement accuracy

Images