Safe and fast beam falling method for railway T-shaped beam

Abstract

The invention particularly relates to a safe and fast beam falling method for a railway T-shaped beam. The problems that when an existing T-shaped beam falls, time and labor are consumed, efficiency is low, and a beam turnover accident is likely to be caused are solved. The method comprises the steps that 1, before the T-shaped beam reaches the plane position through a beam moving sliding rail, the lifting and leveling position is set in advance; 2, a jack is jacked properly, the T-shaped beam is separated from the beam moving sliding rail, the beam moving sliding rail is drawn out, and a support-cushioning temporary upholder is replaced according to the stroke of the jack; 3, the height of the jack is reduced, the temporary upholder is used for supporting, the jack is lifted by rotating and adjusting a spiral tube, after steel cushion blocks are drawn out in sequence, the spiral tube is reversely rotated and adjusted, and a steel supporting plate is lowered to be tightly attached to the top faces of the remaining steel cushion blocks; 4, then the jack is jacked again, and the height of the temporary upholder is reduced; 5, the step 3 and the step 4 are repeated till a bottom support of the T-shaped beam is arranged on supporting cushion stone of bridge pier and abutment cap stone in place, and beam falling operation is completed. According to the method, the problem of beam turnover accidents is avoided, and construction efficiency is improved.

Description

technical field [0001] The invention relates to a method for erecting a railway bridge, in particular to a method for safely and rapidly dropping the railway T-shaped beam after the railway bridge erecting machine erects a prefabricated T-shaped beam and moves in place. Background technique [0002] Ordinary railway bridges mostly adopt stereotyped design, and the girder bodies are mostly T-shaped prestressed reinforced concrete prefabricated beams with standard spans such as 32m and 24m. Each bridge uses two prefabricated beams on the left and right. Generally, the support is installed at the bottom of the prefabricated girder in advance. When erecting with a special railway bridge erecting machine, the beam can be directly dropped on the supporting pad stone of the bridge pier, and anchored by the base bolts. After auxiliary operations such as welding of the side girder body and lateral tensioning and closing, the erection operation is completed, and after the running rail...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of time-consuming and labor-intensive falling of the existing T-shaped beams, low efficiency and easy to cause beam overturning accidents, the present invention provides a safe and rapid falling method of railway T-shaped beams

[0010] The beam dropping method effectively ensures the levelness and verticality in the beam dropping process, and overcomes the time-consuming, laborious, inefficient and easy-to-cause beam-overturning accidents in the existing T-beam falling beam

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