A High Performance Tunnel Fireproof Decoration System

Abstract

The invention discloses a tunnel fireproofing decoration system with high performance. The system comprises a fireproofing decoration plate and an anchoring part which is used for fixing the fireproofing decoration plate on a tunnel wall; the fireproofing decoration plate comprises a base plate of a rectangular thin plate structure, metal panel boxes, and a fluorocarbon paint layer which is smeared on the outer surface of the metal panel box, wherein the metal panel boxes cover the upper surface of the base plate and wrap the upper parts of the four side faces of the base plate respectively after the peripheries of the metal panel boxes are overturned 90 degrees, and the metal panel boxed which abut against the four side faces of the base plate are provided with at least two long strip-shaped frame notches respectively; the anchoring part presents T character-shaped and comprises a long strip iron sheet of which two ends are used for being connected to the frame notches on two adjacent fireproofing decoration plates in a clamping mode respectively, and an expansion bolt which is connected to the middle of the long strip iron sheet and is used for being fixed with the tunnel wall, and the length of each of the frame notches is larger than the breadth of the long strip iron sheet. The tunnel fireproofing decoration system with high performance has the advantages of being high in shock strength, high in fire resistance extremity, good in decoration, long in service life, excellent in heat preservation function, convenient in later-stage cleaning and maintenance and the like.

Description

technical field [0001] The invention relates to a fireproof decoration system, in particular to a high-performance tunnel fireproof decoration system. Background technique [0002] Although the steel bars and concrete used to build tunnels are non-combustible, they have poor fire resistance. Studies have shown that when the temperature reaches 250°C, the strength of the steel bars begins to decline, and when the temperature reaches 380°C, the strength of the concrete begins to decline. When the temperature reaches 600°C, the concrete loses about 75% of its compressive strength, and even bursts. The reason why concrete will burst at high temperatures is because the free water and chemically bound water contained in concrete will turn into water vapor at high temperatures, and The expansion rate is as high as 1700 times, and the concrete structure is dense. If the water vapor cannot be effectively dissipated, the concrete will burst. The serious consequences of tunnel fires h...

AI Technical Summary

Problems solved by technology

Tunnel fire protection panels with calcium silicate as the main component, especially when their bulk density is below 1000kg / m 3 When the water absorption rate is as high as 40%, the technical indicators such as water absorption saturated bending strength are difficult to meet the technical requirements of the existing national standard (GB28376-2012); the tunnel fire protection board mainly made of magnesium oxide and magnesium chloride, because of the Existence, there are problems of brine return and moisture absorption, which affect its durability and fire resistance

[0007] (2) The exposed expansion bolts affect the fire resistance limit of the fireproof board

Existing tunnel fireproof boards are fixed by expansion bolts, and about 6 bolts are needed per square meter. Too dense bolts have a high probability of contacting the steel bars in the concrete, and the bolts are exposed outside the fireproof board, which will greatly reduce the fire resistance limit of the tunnel structure

[0008] (3) The design life of the tunnel is generally 100 years. Due to the problems of the material itself or the construction method of the existing tunnel fireproof board, its service life is difficult to synchronize with the design life of the tunnel

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