Reverse operating construction method for pouring monolithic track bed in separated tunnel of metro section

Abstract

The invention specifically relates to a reverse operating construction method for pouring a monolithic track bed in a separated tunnel of a metro section, and solves the problems of slow constructionprogress, easiness in cracking of concrete of the track bed, serious pollution at the construction site, high labour intensity and high costs in pouring of the monolithic track bed in the separated tunnel of the metro section currently. The reverse operating construction method comprises: a, assembling a track skeleton and pushing the track skeleton to a track-laying operation surface; b, beddingsand pillows and paving the track skeleton in place; c, longitudinally firmly connecting the joint of two rail; d, manufacturing a rail-mounted concrete pump pipe bracket; e, manufacturing a rail-mounted concrete three-point material-deployment funnel; f, performing segment-by-segment track lifting from the distal end of the tunnel, then adjusting the spatial position, and arranging a downhill ramp; g, pushing the rail-mounted concrete pump pipe bracket and the rail-mounted concrete three-point material-deployment funnel to a track bed pouring area; and h, performing precise concrete materialdeployment and pouring on the track bed by manually controlling the positions of an arc material-deployment chute and a discharge port. The reverse operating construction method avoids the quality problem of track bed cracking inducted by the fact that the track bed bears loads too early.

Description

technical field [0001] The invention relates to a construction method for an integral ballast bed of a subway, in particular to a reverse construction method for pouring an integral ballast bed in a subway section-separated tunnel. Background technique [0002] The subway has become an important means of transportation in the city. At present, shield machines are mostly used for excavation in subway sections, and arc-shaped segments are installed simultaneously to form separate tunnels with circular sections. [0003] Long sleeper embedded cast-in-situ concrete monolithic trackbeds are often used in subway tunnels. The construction points are as follows: 25m standard steel rails and prefabricated sleepers are used to form rail rows, and the rail rows are sent to the laying site to be laid in place one by one, structural steel bars are bound, and measurement methods are used Cooperate with the regulator to position the rail row in space, and the vertical cast-in-place concret...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of slow construction progress, easy cracking of ballast concrete, serious pollution at the construction site, high labor intensity and high cost in the pouring of the integral track bed in the existing subway section separated tunnel, the present invention provides a subway section separated tunnel. Inverted construction method of monolithic ballast bed pouring

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