Tunnel Escape Pipe - Tunnel Escape Pipe Specifications

On July 29, 2012, the "7.29" collapse accident at the Leigong Mountain Tunnel on the Xiamen-Zhangzhou Expressway resulted in four deaths and two injuries due to the collapse of the horizontal layer at the face, with direct economic losses exceeding 2.4 million yuan. Similarly, in the "4.20" collapse accident on the Lanzhou-Xinjiang Railway in 2011, twelve workers were buried, leading to tremendous losses. In response to the frequent occurrence of tunnel collapse accidents, in 2014, Luoyang Guorun New Materials and Shanghai Chemical Research Institute jointly established a high molecular material research and development center, which first applied new materials (the new tunnel escape pipe is a linear structure thermoplastic engineering plastic formed by the polymerization of ethylene and butadiene monomers under the action of a catalyst, with an average molecular weight of over 2 million) for the design and research of emergency rescue channels in highway tunnel construction.

Characteristics of the New Tunnel Escape Pipe

1. The Luoyang Guorun New Materials Tunnel Safe Escape Channel has low material costs, saving procurement costs for engineering projects.

2. The tunnel safe escape channel has strong corrosion resistance, is easy to construct, and has a service life of 30-50 years.

3. The tunnel safe escape channel also exhibits good corrosion and impact resistance under low-temperature conditions.

4. The tunnel safe escape channel is made from our company's unique formula, providing high corrosion reliability.

5. The tunnel safe escape channel is designed for convenience and easy installation, with ports equipped with connecting components and lifting rings, making installation and lifting straightforward.

6. The bottom layer of the tunnel safe escape channel contacts an epoxy powder anti-corrosion coating, with an outer layer of resin anti-rust paint. The inner wall of the tunnel safe escape channel is smooth, allowing for quick escape during an accident without causing secondary abrasions.

7. Our company's tunnel safe escape channel is recognized for its effective performance and reliability as a pipe anti-corrosion coating, which has been applied in numerous projects.

Reliability Verification of the Tunnel Escape Pipe

Test Purpose

The feasibility of using the new tunnel escape pipe for emergency rescue during highway tunnel collapses is demonstrated by conducting impact tests on tunnel escape pipes and steel pipes of similar dimensions.

Test Materials

1. Q235 spiral seam submerged arc welded steel pipe, specifications Φ620×10. Yield strength σ1=215GPa, Elastic modulusE1=210MPa; Poisson's ratio ν1=0.25.

2. Tunnel escape pipe (molecular weight about 2.5 million), specifications Φ800×30mm, Yield strength σ1=3.7GPa, Elastic modulusE1=700MPa; Poisson's ratio ν1=0.42.

Test Requirements and Methods

Using steel pipes and tunnel escape pipes of similar dimensions, a heavy object will be freely released from a height H of 10m above the top of the circular pipe to conduct comparative impact tests, verifying the reliability of the tunnel escape pipe.

1. The impact test piece is a block of granite, with an initial diameter of0.67m. The parameters of the rock body are: Elastic modulusE=40MPa; Poisson's ratio: ν1=0.2; Density ρ1=2500kg/m3; Rock block weightW=400kg.

2. The circular pipe is placed on a smooth sandbag layer, with a thickness of250mm, and the width exceeds that of ultra-high molecular weight polyethylene.

The thin-walled circular pipe used for tunnel construction escape is freely placed on a smooth cushion layer. When impacted by falling rocks, the bottom of the circular pipe primarily experiences vertical and horizontal friction constraints from the cushion layer. The distance from the impact test piece to the top of the circular pipe mainly depends on the excavation height of the tunnel cross-section. In this experiment, the maximum height from the center top of the tunnel to the top of the circular pipe is taken as H of 10m, and the block is freely released to conduct impacts on both the tunnel escape pipe and the steel pipe. The experimental results show that after being impacted, the tunnel escape pipe ejects the stone with almost no damage, demonstrating good impact resistance; while the steel pipe gets crushed and deformed upon impact.

Certification Conclusion:

Due to the lightweight nature of the tunnel escape pipe, it is convenient for disassembly and transportation; the pipe has good toughness and high impact strength, instantaneously deforming under strong external impact, absorbing a large amount of impact energy, and then quickly restoring its original shape, providing extremely safe assurance for emergency rescue during highway tunnel construction; the pipe has high ring stiffness, good pressure resistance, and is not easily deformed, with its load-bearing capacity and resistance to environmental damage far exceeding that of general pipes during tunnel construction collapses.

Tunnel Construction Escape Pipe Engineering Cases

China Railway 12th Bureau Renbo ExpresswayT Contract Section (Tunnel Construction Escape Pipe in Xinfeng County, Shaoguan City, Guangdong Province)

Yunnan Yunling Expressway Traffic Technology Co., Ltd. (Tunnel Construction Escape Pipe in Mengla County, Xishuangbanna, Yunnan Province)

China Railway 19th Bureau Group YunGui Railway Yunnan Company (Tunnel Construction Escape Pipe in the main line of YunGui Railway in Yunnan)

China Railway 2nd Institute YunGui Railway Firefighting Project Department (Tunnel Construction Escape Pipe in YunGui Railway Construction Department)

China Communications Fourth Navigation Bureau YunGui Railway Project Department (Tunnel Construction Escape Pipe in Namo No.1 Tunnel, YunGui Railway Project Division 2)

China Railway Tunnel Bureau YunGui Railway Project Department (Tunnel Construction Escape Pipe in YunGui Railway Project Division 3)

China Railway 10th Bureau YunGui Railway Project Department (Tunnel Construction Escape Pipe in YunGui Railway Project)

China Railway 12th Bureau Hu-Kun Railway Project Department (Tunnel Construction Escape Pipe in the Hunan Section of China Railway 12th Bureau Group)

China Railway 19th Bureau YunGui Project Department (Tunnel Construction Escape Pipe in the YGZQ-4 project section of China Railway 19th Bureau Group YunGui Railway)

National Hotline:136 9888 7149   0379-65227507  

Factory Location: China, Luoyang, Zhejiang Merchant Industrial Park.