Railway shed tunnel T-shaped beam hoisting construction method

Abstract

The invention relates to a railway shed tunnel T-shaped beam hoisting construction method, and belongs to the technical field of railway anti-collapse equipment. According to the method, a T-shaped beam is prefabricated in different places off site, a stand column and a longitudinal beam are installed in a foundation pit of an excavated shed tunnel, and winches are installed on the ground at the two ends of the longitudinal beam by means of an existing railway track below the longitudinal beam. A simple gantry crane with a plurality of telescopic supporting legs and a crane rail formed by splicing a plurality of unit-length single-section rails are erected on the longitudinal beams, the gantry crane is used for hoisting the T-shaped beams on a sliding plate, and then the gantry crane crosses the T-shaped beams and the sliding plate one by one by disassembling and splicing the front and rear single-section rails of the crane rail and stretching and retracting the supporting legs. Then a winch is used for pulling the sliding plate and the T-shaped beam on the sliding plate to the vacant design position on the longitudinal beam; and the crane rail and the supporting legs of the simple gantry crane are mounted at the top of the hoisted T-shaped beam, so that the hoisting of all the T-shaped beams on the longitudinal beam is completed. By means of the method, hoisting of the railway shed tunnel prefabricated T-shaped beam can be easier and more convenient.

Description

technical field [0001] The invention relates to a construction method for hoisting a T-shaped beam in a railway shed tunnel, and belongs to the technical field of railway collapse prevention equipment. Background technique [0002] In the process of railway construction in the southwestern mountainous area, it is inevitable to encounter landforms along rivers and mountains, and a large number of high slopes and steep cliffs have been produced during the construction process. With the passage of time, many slope structure reinforcement measures built in the early years have gradually failed, and the weathering of the rock mass on the slope surface has become increasingly serious, and the stability has deteriorated. , affecting the safety of railway traffic. [0003] Building a new protective shed on the railway business line is an effective measure to control the slope of the tunnel entrance and exit and the dangerous rockfall of the high cutting slope. The construction of ...

AI Technical Summary

Problems solved by technology

However, this technical solution proposes to use the top of the shed as a prefabricated site for T-beams, and to install the gantry crane by setting corbels outside the longitudinal beams of the shed. Therefore, the load design requirements for the columns, longitudinal beams and corbels of the shed are relatively high. It must reach a certain thickness to resist the eccentric load generated by the hoisting of the gantry crane and the T-beam. The on-site installation of the gantry crane and the on-site prefabrication and hoisting of the T-beam are not easy to realize

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