UHMWPE Escape Tube

UHMWPE escape pipe

In order to avoid the danger of collapse during tunnel construction, the tunnel construction escape pipeline has been researched, which provides an extremely safe and reliable guarantee for highway tunnel construction escape emergency rescue.
The traditional escape pipe is made of steel, but the steel pipe is seriously deformed when it is hit by an external force, and its impact resistance is poor. On the basis of meeting the general requirements of escape pipelines, our company has developed a new type of escape pipeline - ultra-high molecular weight polyethylene escape pipeline.

advantage
1. Impact resistance: It deforms instantly when it is impacted by a strong external force, absorbs a large amount of impact energy, and then quickly returns to its original shape.
2. Wear resistance: wear resistance is more than 4 times that of carbon steel Q235.
3. Long service life: ultra-high molecular weight polyethylene pipes are aging-resistant and have a service life of more than 50 years.
4. Light weight: only about 1/8 of the weight of the steel pipe, easy to disassemble and carry.
5. High ring stiffness: The pipe has good pressure resistance and is not easy to deform. When a collapse occurs in the construction of a road tunnel, the pressure bearing capacity and environmental damage resistance are far superior to ordinary pipes.
6. Corrosion resistance: Ultra-high molecular weight polyethylene has extremely high chemical stability and can withstand the erosion of various corrosive media (acid, alkali, salt) and organic solvents.

Meaning of symbols: "√" is stable, "△" is relatively stable, "×" is unstable

7. High toughness: The elongation at break of the pipe is above 350%, showing extremely strong toughness.
8. Maintenance-free: the pipe has excellent performance and will not be damaged after decades of use, greatly reducing maintenance costs.
9. Environmental protection and sanitation: Ultra-high molecular weight polyethylene material is an environmentally friendly material certified by the state. It is non-toxic and harmless to the human body. It is the best choice for water supply pipes.

product specification
According to the research results of anthropometry by the famous American expert Alvin R. Tilly, a pioneer of applied anthropometry, it can be known that when a person crawls and moves, the crawling height is 800mm and the crawling length is 320mm in a more comfortable condition. Alvin R. R. Tilley pointed out that when crawling through the bottom entrance and exit of the circular hole that the whole body enters up and down, the diameter of the circular pipe is 800mm.
The inner diameter of the new emergency rescue channel for highway tunnel construction must be ≥585mm to ensure the normal passage of the human body. At the same time, considering the actual situation of the highway tunnel construction site, the outer diameter of the emergency rescue channel should not be too large, otherwise it will have a great impact on the construction. Therefore, the specification of the ultra-high molecular weight polyethylene escape pipe produced by our company is Ф800mm.

Construction points
1. The construction site should prepare sufficient pipelines and connecting materials according to the tunnel surrounding rock, excavation methods, etc. In addition to the entire pipeline, it should also prepare sufficient 1-meter, 2-meter, and 3-meter short-section pipelines and adapters (135 °) etc.
2. The pipe material used for the ultra-high molecular weight polyethylene escape channel is φ800mm, the length of the pipe joint is 5-6m, and the wall thickness is not less than 10mm. Temporary fixation with rings or wooden wedges. In order to ensure that the pipeline can withstand the pressure of the collapsed body, the material used for the pipeline must ensure its pressure-bearing capacity and the firmness of the joint, and it can be used in the tunnel after specific tests in the laboratory.

3. Pipes must be processed before they can be used. The road tunnel work area can be processed separately in combination with the material and the actual situation on site. The connection is required to be simple, firm, tight and reliable, and temporary fixing measures should be taken on the ground. Temporary seals can be added to the nozzle during construction. Cover, and easy to open and close.
4. The ultra-high molecular weight polyethylene escape pipe adopts a socket pipe of φ800mm. The starting point is the end of the second lining that has been constructed, and the distance from the end of the second lining should not be greater than 5 meters. It is arranged from the lining working surface to the distance from the excavation surface At an appropriate position within 20m, the ultra-high molecular weight polyethylene escape pipe is laid along the side of the initial support to the tunnel face, and a working rope is reserved in the pipe to facilitate escape, emergency rescue, communication and transmission of various items, and socket ultra-high molecular weight polyethylene Measures such as chains can be used for the longitudinal connection of polyethylene escape pipes to prevent the escape pipes from being washed away when they collapse.

5. During the process of moving the escape pipeline into place by the second lining trolley, it should be removed section by section during temporary removal. It is strictly forbidden to dismantle it in place at one time, so as to ensure the effectiveness of the escape pipeline at any time.
6. When the escape pipeline passes through the excavation steps, it should be arranged along the steps, and a 135° adapter can be installed to extend it. The overhead height and length of the pipeline should not affect the construction and facilitate the opening of the escape window.
7. The escape pipeline should be flat, dry and smooth, and should not be used for purposes other than emergency escape.