Tunnel structure with rectangular cross section

Abstract

The embodiment of the invention relates to the technical field of tunnel ventilation and smoke discharge, in particular to a tunnel structure with a rectangular cross section. The tunnel structure comprises travelling tunnels, a pipe gallery, a tunnel machine room, a smoke discharge ventilating shaft and a tunnel smoke discharge system, wherein the pipe gallery comprises a smoke discharge air flueand a cable channel; a dismountable fire-proof plate is installed at the bottom of the cable channel; the tunnel smoke discharge system comprises a plurality of transverse smoke discharge pipes, smoke discharge efficiency promotion devices corresponding to the transverse smoke discharge pipes one to one, an air shaft end smoke discharge device and a control device; the transverse smoke dischargepipes are installed at the tops of the travelling tunnels at intervals in the length direction of the travelling tunnels; and the smoke discharge efficiency promotion devices are installed in the smoke discharge air flue and communicate with corresponding smoke outlets. The tunnel structure can reduce the construction difficulty and the construction cost and can improve the smoke discharge efficiency.

Description

technical field [0001] The present application relates to the technical field of tunnel ventilation and smoke exhaust, in particular to a tunnel structure with a rectangular cross section. Background technique [0002] The existing ultra-long underwater tunnels have the characteristics of long distances, large cross-sections, and high fire hazards, which bring great difficulties to the installation of tunnel ventilation and smoke exhaust systems. The ventilation and smoke exhaust system of ultra-long underwater tunnels usually adopts a focused smoke exhaust method. The cross-section of the tunnel generally adopts the structure of two holes and one pipe gallery. The holes on both sides are tunnels for vehicles. and piping space. At the same time, the key smoke exhaust system should consider the layout of professional equipment caverns and pipelines, and the arrangement of personnel evacuation channels in the cross section. The rationality of the cross-section structure of ...

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Problems solved by technology

[0003] The existing tunnel forms a concrete smoke exhaust duct by secondary masonry on the top of the vehicle tunnel. Since the pouring of the concrete smoke exhaust duct needs to raise the height of the tunnel roof, the construction is difficult and the civil engineering cost is increased; at the same time, the pipe gallery The cable channel inside is also made of concrete structure, and the installation and maintenance height of the cable channel is required to be no less than 1.8m. It is also necessary to increase the tunnel height, which leads to the problem of increasing the tunnel construction cost

[0004] To sum up, the existing tunnels have the problems of high construction difficulty and high construction cost

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