Flue sheet structure for tunnel exhaust duct

Abstract

The invention discloses a flue sheet structure for a tunnel exhaust duct. The flue sheet structure comprises a plurality of prefabricated flue plates, the prefabricated flue plates are sequentially spliced in the length direction of a tunnel, and the cross sections of the prefabricated flue plates are in arch shapes. Each prefabricated flue plate comprises the convex top face, the concave bottom face and the two butt-joint end faces, wherein the two butt-joint end faces are arranged in a back-to-back mode, the convex top face and the concave bottom face are arranged between the two butt-joint end faces, the convex top face is located above the convex bottom face, and long-strip-shaped notches are formed in the connecting positions of the two butt-joint end faces and the convex top face. The adjacent prefabricated flue plates are connected in a butt joint mode through the butt-joint end faces and the notches, and the notches are filled with cast-in-place reinforced concrete. According to the flue sheet structure, the plates of the arch-shaped structures are adopted, and long-term deflection under the dead-load effect of the structure can be reduced; meanwhile, seepage water at a tunnel vault can be collected towards the two sides of a flue sheet through the arch-shaped gradient to be discharged into tunnel drainage ditches so that influences, caused by the wet environment, on inner-flue mechanical equipment can be reduced.

Description

technical field [0001] The invention relates to the technical field of flue plate structure design, in particular to a flue plate structure for tunnel air exhaust ducts. Background technique [0002] In order to meet the comfort of the tunnel under normal operating conditions and the safety under extreme conditions (fire), long tunnels usually need to be equipped with a mechanical ventilation and smoke exhaust system. At present, the design of tunnel smoke exhaust is basically combined with the ventilation method. Under normal conditions, it is a ventilation function to meet the requirements of environmental control; in the event of a fire, it is a smoke exhaust and smoke control function. Its main purpose is to create a safe evacuation for passengers. Routes and help firefighters reach the fire scene smoothly. [0003] The way of smoke exhaust can be classified into two types: horizontal smoke exhaust mode and vertical smoke exhaust mode. The horizontal ventilation method...

AI Technical Summary

Problems solved by technology

At present, no seam structure has been found at home and abroad for the joint structure of similar tunnel flue plates, which is under the environment of alternating positive and negative pressure and must ensure the sealing performance

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