Research on the Design of Construction Scheme for Box Beam Installation on Highways under Complex Conditions
With the continuous improvement of the expressway network in the Greater Bay Area,the site selection of expressways is becoming increasingly complex in terms of terrain and landforms,and various complex working conditions will be faced during construction.The Zhuning Road overpass of Zengtian Expressway crosses a 220kV high-voltage line under the low clearance,and crosses the intersection of County Road X268 and Guiling Village Road.There are also 10kV high-voltage lines,buried water pipes,multiple communication lines,and 20～30 meter high roadside trees next to County Road X268.The complex construction conditions increase the safety risks of the box girder erection of the bridge.Through precise analysis of the on-site construction conditions,the beam erection scheme design is divided into two working conditions,using bridge erecting machines and large tonnage gantry cranes to complete the box girder erection without any dangerous incidents,providing reference for similar construction in the future.
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