Road Tunnel Escape Pipe is made of ultra-high molecular weight polyethylene material, which has unparalleled impact resistance, compressive strength, wear resistance, aging resistance, lightweight properties compared to other engineering plastics. It is also resistant to chemical corrosion, hygienic and non-toxic, and not easily adhesive, and is known as "miraculous plastic" abroad. Therefore, the new tunnel escape pipe - ultra-high molecular weight polyethylene has a wide range of application prospects in fields such as machinery, transportation, textiles, papermaking, mining, agriculture, and chemical engineering.
Road Tunnel Escape Pipe: Specifications are Φ800*30, with main parameter values: yield strength σ1=3.7GPa, elastic modulus: E1=700MPa; Poisson's ratio ν1=0.42; density: ρ1=950kg/m3.
The impact test specimen is a block of granite, with an initial selected rock block diameter of 0.67m. The rock body parameter values are: elastic modulus E2=40GPa, Poisson's ratio ν2=0.2, density ρ2=2500kg/m3. The weight of the rock block W=400kg. Taking the maximum height H from the center of the tunnel and the top edge to the top of the round pipe as 7m and 5m, releasing the block freely, impacts are conducted on the tunnel escape pipe and steel pipe, respectively. The falling velocities can be calculated based on the conservation of energy, which are v1=11.7m/s and v1=9.9m/s, respectively. Calculations are performed for different wall thicknesses H of the round pipe, and impact deformation values for pipes of different wall thickness dimensions are obtained.
From the results, it can be seen that the impact energy of the stone falling from a height of 10m is very large. At the same time, the Yunnan φ800 ultra-high molecular escape pipe has extremely high impact resistance, and external impacts cannot cause it to rupture. Moreover, it has good toughness and the ability to absorb impact energy, being able to absorb most of the impact energy during the impact of a large stone, reducing damage to the pipe. The impact resistance of the steel pipe is not as good as that of the tunnel escape pipe, and it deforms after being struck by stones, making recovery difficult.
Conclusion: For the first time, the Road Tunnel Escape Pipe has been designed for the tunnel fire emergency rescue passage. At the same time, the structural dimensions of the tunnel escape pipe comply with ergonomic principles, and the structure is simple and easy to assemble and disassemble. Finally, through comparative tests of impact resistance between the tunnel escape pipe and steel pipe, the reliability of the tunnel escape pipe for fire emergency rescue in road tunnels has been verified.
Henan Deyuan Rubber and Plastic Products Co., Ltd. is a high-tech enterprise integrating R&D, production, and sales, specializing in the production of ultra-high molecular weight polyethylene pipes, road tunnel escape pipes, steel belt reinforced polyethylene (HDPE) spiral corrugated pipes, HDPE pipes, internal and external coated composite steel pipes, 3PE anti-corrosion pipes, lined plastic pipes (steel lined PO pipes, steel lined PE pipes, steel lined fluorine pipes), lined rubber pipes, and other series of multi-specification pipe fittings and pipes. The products are mainly applied in industries such as chemical, electric power, mining, metallurgy, pharmaceuticals, water conservancy, municipal, construction, environmental protection, dredging, and coal washing.
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