Construction method of hoisting T-beam in railway shed tunnel

Abstract

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. The T-beams of this method are prefabricated off-site, and the columns and longitudinal beams are installed in the foundation pit of the excavated shed. The existing railway tracks under the longitudinal beams are borrowed and installed on the ground at both ends of the longitudinal beams. The winch, set up a simple gantry crane with retractable multi-legs on the longitudinal beam and a crane track that is spliced ​​with multiple single-section tracks of unit length. The joint track is disassembled and spliced ​​and the outriggers are stretched to make the gantry crane span the T-beam and the slide plate one by one, and then use the winch to pull the slide plate and the T-beam on it to the vacant design position on the longitudinal beam; and then the crane track and the simple The outriggers of the gantry crane are installed on the top of the hoisted T-beam, thus completing the hoisting of all T-beams on the longitudinal beam. The method can make the hoisting of the prefabricated T-beam in the railway shed tunnel 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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