Construction method for quickly assembling the transverse block of a bridge substructure

Abstract

The invention relates to a construction method for quickly assembling the transverse block of a bridge substructure, which comprises the following steps: 1, integrated construction of a precast pier column cover beam; Wherein the lower part of the pier column of the precast pier column cover beam is provided with a steel plate hoop, and shear nails are welded on the outer surface of the steel plate hoop; 2, excavate that foundation pit and temporarily supporting the foundation pit; 3, constructing a concrete cushion layer at the bottom of the foundation pit; 4, constructing pier column foundation: the pier column foundation adopts cast-in-place enlarged foundation, and a cup mouth is arranged at the top of the enlarged foundation, and a ring of anchor plates are embedded around the top ofthe cup mouth; 5, performing hoisting and positioning of the cover beam of the precast pier column; 6, backfilling the foundation pit; 7, hoisting the main girder is in place. The invention solves thetechnical problems that the lifting elevation and the axis deviation of the traditional prefabricated bridge substructure are difficult to control, the positioning accuracy is low, the strength of the filler between the expanded foundation and the expansion foundation is slow, and the construction period is long.

Description

technical field [0001] The invention belongs to the field of bridge engineering, and in particular relates to a construction method for quickly assembling bridge substructures in horizontal blocks. Background technique [0002] With the deepening of China's urbanization process, the demand for urban transportation has grown rapidly, the number of urban transportation construction projects has increased year by year, and the construction of transportation networks in large cities has entered a stage of acceleration. About a quarter of the vast highway bridge population is obsolete or non-functional; that is, thousands of bridges need to be repaired, reinforced, or replaced. The renovation and upgrading of bridges is undoubtedly a good thing in the long run, and it is necessary; but in the present, it will bring great troubles to daily traffic. Breaking off the traffic and detours will not only cause traffic chaos, but also cause delays and delays for users. Unnecessary fuel ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method for quickly assembling bridge substructures in horizontal blocks, which solves the difficulty in controlling the hoisting elevation and axis deviation of the traditional prefabricated bridge substructures, low positioning accuracy, and problems with filling materials between enlarged foundations. Technical problems of slow strength and long construction period

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