A method for crossing a bridge machine hole

Abstract

This invention relates to the field of bridge construction technology, specifically to a method for a bridge erecting machine to pass through a span. By installing a movable counterweight assembly at the rear of the main beam, during the span-passing operation, tilt sensors collect real-time data on the pitch angle changes at the front end of the main beam, quantifying this as Δθ. A controller, based on a cantilever mechanics model and considering the main beam's weight distribution and the real-time position of the outriggers, calculates the increment L of the balancing arm required for the corresponding balancing moment and drives the movable counterweight assembly to dynamically adjust along a slide rail. This invention eliminates the need for external temporary supports or fixed counterweights during span-passing operations, effectively counteracting the dynamic overturning moment. It solves the problems of excessive machine weight, inability to dynamically adjust the counterweight, low construction efficiency, and high overturning risk associated with traditional bridge erecting machines relying on fixed counterweights, thus improving the automation, safety, and efficiency of span-passing operations.

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