A monitoring and control system for the entire construction process of a long-span high-speed railway cable-stayed bridge with low towers.

Abstract

This invention discloses a monitoring and control system for the entire construction process of a long-span high-speed railway cable-stayed bridge with low towers. It is applicable to cantilever construction of a pier-beam hinged tower-beam fixed system. The system includes modules for foundation environment sensing, multi-dimensional sensing of the hanging basket, physical decoupling of the reference body, cable saddle friction contact sensing, hydraulic servo linkage, and data processing and reconstruction. By setting a zero-stress physical reference body in the same environment and performing data subtraction, physical-level decoupling of concrete shrinkage and creep from temperature loads is achieved. The sensing array quantifies the wind-induced transient torque of the hanging basket, triggering the hydraulic damping array to output a reverse compensation bending moment, actively offsetting wind load eccentricity. The cumulative frictional resistance is obtained through the cable saddle flexible compressive resistance matrix to provide early warning of slippage. Finally, during the system conversion stage, the optimal cable adjustment command is output by combining finite element analysis and optimization algorithms. This invention eliminates the interference of strong coastal winds and environmental disturbances on the data, ensuring high-precision closure and safe construction of semi-floating bridge systems.

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