Segmental assembly method of whole hole box girder applied to bridge construction

Abstract

The invention discloses a full-span box girder segment assembling method applied to bridge construction. The full-span box girder segment assembling method comprises the following steps that (1) full-span box girder segments to be assembled are transported to the tail part of a bridge fabrication machine by a girder transporting trolley; (2) a warm shed is arranged on the bridge fabrication machine so that the warm shed completely wraps the whole bridge fabrication machine; (3) the full-span box girder segments are suspended and placed in the preset positions by the bridge fabrication machine, and in addition, a jack is used for carrying out space position regulation so that the full-span box girder segments are placed according to the specified line shape; (4) wet joint steel bars are bound at the end parts of the full-span box girder segments, a wet joint template is installed, and in addition, wet joint concrete is poured; (5) the wet joint concrete is subjected to covering maintenance until the intensity and the elasticity modulus reache the design requirement; (6) the prestress tensioning is carried out, then, the bridge fabrication machine is emptied and forwards moves to pass through a hole, and the assembling of the next full-span box girder segments is carried out; and (7) a maintenance shed is built for carrying out later-period maintenance on wet joints. The full-span box girder segment assembling method has the advantages that the construction in cold weather can be realized under the condition of ensuring the construction quality, and high practical values and promotion values are realized.

Description

technical field [0001] The invention relates to a bridge construction technology, in particular to a segmental assembling method of a whole-hole box girder applied to bridge construction. Background technique [0002] Bridge construction has the characteristics of long period, poor construction environment and high technical difficulty, especially in areas with poor geographical environment. For example, Shuozhou City, Shanxi Province has a continental monsoon climate, with long winters, spring and autumn, simultaneous rain and heat, strong solar radiation, long sunshine hours, large temperature differences, short frost-free period, dry and windy are the main characteristics of the regional climate. The annual average temperature in this area is 3.9-7.2°C, the extreme maximum temperature is 37.9°C, and the extreme minimum temperature is -40.4°C. According to the railway engineering climate division, it is a cold area. [0003] There are many bridge construction environments...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for assembling whole hole box girder segments used in bridge construction, which mainly solves the problem that it is difficult to complete the assembly construction in cold weather after the whole hole box girder segments are prefabricated