Vibration reduction buffering method and system for offshore steel girder hoisting

Abstract

The invention discloses a vibration reduction buffering method and system for offshore steel girder hoisting and relates to the technical field of cross-sea bridge construction. The system comprises an automatic identification system and a vibration reduction system, wherein the automatic identification system is arranged on a bridge pier and comprises a wind wave detection assembly and a vibration testing assembly; the wind wave detection assembly comprises an anemometer and a wave meter; the vibration testing assembly comprises a ship body attitude instrument and an inclinometer; the vibration reduction system is arranged on the top surface of the bridge pier or the bottom surface of a steel girder. According to the vibration reduction buffering method and system for offshore steel girder hoisting, a wind wave monitoring system is arranged; the system can conduct real-time wind wave monitoring and floating crane-steel girder system vibration testing by identifying vibration reductionbuffering measures to be taken for steel girder hoisting, establishes the relationship between the field wind wave conditions and a floating crane-steel girder system so as to judge whether to need vibration reduction buffering during steel girder hoisting or not and judge specific buffering and vibration reduction measures required for steel girder hoisting.

Description

technical field [0001] The invention relates to the technical field of sea-crossing bridge construction, in particular to a vibration reduction and buffering method and system for hoisting steel girders at sea. Background technique [0002] As my country's bridge construction extends from land to sea, the construction of cross-sea bridges has become the focus of future bridge construction. The steel girders of cross-sea bridges are generally hoisted by large floating cranes. Due to the complex wind and wave environment near the construction area, the construction of cross-sea bridges is much more difficult than inland and inland river bridges of the same span and scale. Under the action of wind and waves, the safety and reliability of the steel girder hoisting of the cross-sea bridge face greater risks. When the girder falls vertically, its impact coefficient must be controlled within a certain range to ensure the hoisting of the steel girder and related components Safety; ...

AI Technical Summary

Problems solved by technology

[0003] The vibration reduction devices used in the erection of existing land bridges are mainly vibration-absorbing buffer layers or horizontal vibration-reducing dampers. The former can only effectively deal with instantaneous impacts in a single direction caused by accidents or improper control; Vibration reduction requirements in environments with a single vibration direction and small amplitude changes such as strong winds

Therefore, the existing devices are difficult to produce effects on the special environment with frequent vertical and lateral vibrations, changeable directions, and large amplitude changes under the construction environment of the sea-crossing bridge with strong wind and waves.

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