A trolley used for pouring air ducts on the rail top of a subway station

Abstract

A trolley for subway station rail top air duct pouring comprises a trolley body. The top of the trolley body is provided with a supporting structure for supporting a rail top air duct module. The supporting structure comprises a fixed beam, a first movable beam hinged to one end of the fixed beam, and a second movable beam which is hinged to the position, located below the first movable beam, of the side surface of the trolley body. A driving mechanism for driving the second movable beam to turn over is connected to the second movable beam. When driven to turn over to an oblique upward predetermined state through the driving mechanism, the second movable beam supports the first movable beam to turn over to a horizontal state so that the fixed beam and the first movable beam can form a horizontal supporting structure for supporting a bottom plate in the rail top air duct module. When the second movable beam is driven to turn over to a horizontal state through the driving mechanism, the first movable beam is subjected to the gravity action to downwards turn over to an approximate vertical state, and the fixed beam and the second movable beam form a step supporting structure for supporting the bottom plate and a lower vertical wall in the rail top air duct module. The state can be switched by controlling the driving mechanism.

Description

Technical field [0001] The invention relates to the field of building construction, in particular to a trolley used for pouring a rail top air duct of a subway station. Background technique [0002] The rail-top air duct, that is, the exhaust air duct on the top of the train, is an important internal structural component in the ventilation system of a subway station. It is suspended at the intersection of the station mid-slab and the structural side wall. Due to the particularity of its location, it is generally not poured at the same time as the main body of the station, especially in the station that needs to pass through the shield construction, the rail top air duct must be poured later. [0003] The existing post-pouring construction method usually adopts the form of erecting steel pipe scaffolding and wooden formwork in sections. After the scaffolding is completed, install the bottom plate formwork, tie the bottom plate and the vertical wall reinforcement, install the vertica...

AI Technical Summary

Problems solved by technology

[0005] However, there are generally two types of cross-sectional shapes of the existing rail top air ducts. One is the cross-sectional shape of the rail top air ducts disclosed in the invention patent of CN204311741U. The cross-section of the channel is close to the cross-sectional shape of the channel steel. In order to support the two kinds of rail top air ducts with different cross-sectional shapes, a support structure with a corresponding shape needs to be built on the top of the trolley, and the rail top air ducts with different cross-sections need to be manually climbed to change. The supporting structure is erected, but there are safety risks in high-altitude operations, and there is room for improvement in the existing trolleys used for pouring air ducts on the top of subway stations

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