Temporary T structure comprising continuous rigid frame side span beam segments without supports and construction method of structure

Abstract

The invention provides a temporary T structure comprising continuous rigid frame side span beam segments without supports and a construction method of the structure. A temporary high-strength threadedbar reinforcement penetrates a through hole formed in a temporary supporting device and is connected with a first side span cast-in-site segment and a second side span cast-in-site segment. After concrete strength reaches design strength, the temporary high-strength threaded bar reinforcement is tensioned. A side span cantilever segment is cast by a hanging basket cast-in-place cantilever method,and stages of the side span cantilever segment are synchronously tensioned by stages to a closure segment by a temporary steel rope. Permanent web steel ropes and permanent bottom plate steel ropes are sequentially tensioned in batch, so that the side span cantilever segment and a middle pier cantilever side span segment are closed by the closure segment, and system transformation is finished. The construction method of the temporary T structure comprising the continuous rigid frame side span beam segments without supports has the advantages of good construction quality, low cost, short construction cycle, good economic benefits and social benefits and the like, and particularly has strong competitiveness in deepwater high-pier continuous rigid frame construction.

Description

technical field [0001] The invention relates to the technical field of construction methods of highway and railway bridge structures, and more specifically relates to a temporary T-structure composed of unsupported continuous rigid frame side-span beam sections and a construction method thereof. Background technique [0002] The unsupported continuous rigid frame bridge is a newly developed bridge type in recent years. Compared with the traditional continuous beam (rigid frame) side pier with movable supports, the side pier adopts the form of pier beam consolidation. In order to better adapt to the longitudinal expansion and deformation of the main beam under temperature load, the side piers are double-branched thin-walled piers with low thrust stiffness, and the main beam is only consolidated with one of the thin-walled columns. After research on related bridges at home and abroad, the main characteristics of the continuous rigid structure without support are: (1) no suppor...

AI Technical Summary

Problems solved by technology

For the cast-in-place section with a length of 35m, the traditional support beside the pier cannot meet the requirements. It is necessary to set up a temporary support pier 1 and cooperate with Bailey support 2 to carry out the cast-in-place construction

The height of the pier is 30-50m, the wind and waves are strong, the construction period is long, and the risk factor is high

Images