The installation technical specifications for tunnel fireproof boards must comply with national mandatory standards such as GB 28376-2012, forming a complete system from material requirements, construction processes, key technical parameters to acceptance standards. The specific content of the specifications is as follows:

Technical requirements for materials and auxiliary materials

Board: single-layer board with a fire resistance limit of ≥ 2 hours, double-layer board with an outer layer of ≥ 12mm fiber-reinforced silicate board and an inner layer of ≥ 8mm glass magnesium board, in compliance with GB 50016-2014 standard.

Keel and fasteners: The main keel is made of hot-dip galvanized steel with a spacing of ≤ 600mm; the fixing bolts have a high temperature resistance of ≥ 800 ℃ with a spacing of ≤ 300mm.

Fireproof sealant: It must be certified according to GB/T 24267-2009, with an expansion coefficient of ≥ 200%, and used for filling and sealing all joints.

Preparation standards before construction

Grassroots treatment: Remove floating ash from tunnel walls, with a flatness deviation of ≤ 3mm/2m, and apply fireproof interface agent; Waterproof treatment should be carried out in the water seepage area first, and the moisture content of the base surface should be controlled below 8%.

Measurement and positioning: Use a total station to complete the three-dimensional measurement of the curved surface of the tunnel, and use BIM technology to pre arrange plates for irregular structures to reduce on-site cutting losses.

Equipment verification: commissioning the cutting machine, drilling machine and hoisting equipment in advance to ensure that all construction machines and tools work normally.

 Core installation technical specifications

Installation of keel: The vertical deviation of the keel verticality is ≤ 2mm/m, and the intersection of the horizontal keel and the vertical keel is reinforced with rivets with a spacing of ≤ 400mm.

Board installation: After cutting, the edges should be polished without burrs, and staggered splicing should be used with a gap of ≤ 3mm. Self tapping screws should sink 0.5mm into the board surface, and the nail caps must be coated with fireproof paint.

Sealing treatment: All joints and screw holes are filled tightly with fireproof sealant to form a continuous and complete fire barrier, preventing flames and smoke from entering.

✅ Completion Acceptance Specification

Appearance indicators: Overall flatness ≤ 4mm/2m, no hollowing or curling of the board.

Performance test: The joint has passed a 3kPa negative pressure test without detachment, and the fire resistance performance report issued by a third-party organization must meet the design fire resistance limit requirements.

Data verification: All material qualification certificates, testing reports, and construction records must be fully archived and meet the fire safety acceptance requirements of tunnel engineering.

Relevant standards can refer to the Technical Regulations for Tunnel Fire Protection Board Systems.

Shandong Huaneng Insulation Materials Co., Ltd. is a pipeline insulation manufacturer in Linyi. As an integrated insulation and decoration manufacturer in Shandong, our main products include integrated insulation and decoration, pipeline insulation, exterior wall insulation materials, extruded polystyrene board, thermosetting polystyrene board, and rubber insulation. If you need it, you can contact us by phone.

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