Method and system for dynamically regulating and controlling pre-camber in pouring process of U-shaped simply-supported aqueduct

Abstract

The invention discloses a pre-camber dynamic regulation and control method and system in the pouring process of a U-shaped simply-supported aqueduct, and relates to the technical field of hydraulic engineering construction.The method comprises the steps that longitudinal settlement, transverse unbalance loading, structural stress and temperature and humidity data are collected in real time through a multi-source sensing module; based on the transverse unbalance loading and structural stress data, a wet weight-settlement coupling model is constructed, and the concrete wet weight is calculated in real time; the load eccentric distance is calculated through the transverse unbalance load data so as to correct the influence of the torsional deformation of the bracket on the settlement; utilizing extended Kalman filtering to fuse the longitudinal settlement data to generate a pre-camber dynamic compensation amount; when the compensation amount exceeds a preset threshold value, a fuzzy PID controller is triggered to adjust the hydraulic jacking amount of a hydraulic servo jacking mechanism, and meanwhile the initial setting state of concrete is monitored; and after concrete pouring is completed, the electromagnetic valve is switched to release the hydraulic oil way, and the piston rod is pushed to reset to the initial position through the self-reset execution unit. And the construction precision and safety of the U-shaped aqueduct are ensured.

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