High ring stiffness escape pipe, wear-resistant and corrosion-resistant pipe, light escape pipe

&Nbsp; High ring stiffness escape pipe, wear-resistant and corrosion-resistant pipe, light escape pipe Zhongxiong pipe industry
Structural dimension design of UHMWPE tunnel escape pipe  
&Nbsp& Nbsp& Nbsp& Nbsp; According to Alvin ·, a famous American expert who pioneered applied anthropometry; R· According to Tilly's research results on anthropometry, when people are crawling and moving, the crawling height is 800mm and the crawling length is 1520mm, as shown in Figure 2

Alvin · R· Tilly pointed out that the minimum diameter of the circular pipe is 585mm when the entrance and exit at the bottom of the circular hole with full body access is crawling through& Nbsp; Therefore, the inner diameter of the new emergency rescue channel in highway tunnel construction must be ≥ 585mm to ensure the normal passage of the human body& Nbsp;
&Nbsp& Nbsp& Nbsp& Nbsp; 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, so the outer diameter of the UHMWPE pipe is taken as 800mm

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Design of new ultra high molecular weight polyethylene tunnel escape pipe with thin and thick diameter  
&Nbsp& Nbsp& Nbsp& Nbsp; When the thin-walled circular tube is impacted by the high-energy block rock at the top of the tunnel, the overall bending deformation of the lower half of the structure is small, and the deformation is mainly local depression at the impact point& Nbsp;
&Nbsp& Nbsp; According to the theory of hertxz contact mechanics and Thornton hypothesis, assuming that the material has ideal elastoplasticity, the contact pressure between the two contact objects, on the basis of energy analysis, the local depression value △ and lateral load of the circular pipe under lateral impact   According to the relationship between P, the local depression value of the circular tube under lateral impact can be deduced, which is the yield stress of the circular tube material; H is the thickness of the round pipe; D is the diameter of the round pipe& Nbsp;
&Nbsp& Nbsp& Nbsp; Ultra high molecular weight polyethylene tunnel escape pipe (molecular weight is about 2
5 million), with specification of φ 800*30
The main parameters are: yield strength σ 1=3
7gpa, elastic modulus: e1=700mpa; Poisson's ratio ν 1=0
42& Nbsp; Density: ρ 1=950kg/m3

The impact specimen is massive granite, the diameter of rock block is preliminarily selected as 0
67M, and the rock mass parameters are: elastic modulus   E2=40gpa,   Poisson's ratio ν 2=0
2 , Density ρ 2=2500kg/m3& Nbsp; Weight of rock block   W=400kg& Nbsp;
&Nbsp& Nbsp& Nbsp& Nbsp; Take the limit value h of the height from the center of the tunnel and the top of the side to the top of the circular pipe as 7m and 5m, release the block stone freely, and impact the UHMWPE tunnel escape pipe and the steel pipe respectively
At this time, the falling speed of the rock block can be calculated according to the law of energy conservation, which is v1= 11
7m/s and v1=9
9m/s respectively& Nbsp; Take the wall thickness h of different circular tubes for calculation, and the calculation results of impact deformation values of circular tubes with different wall thickness are shown in table 1  As shown in

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It can be seen from table 1 that with the increase of the wall thickness of the circular pipe, the deformation value of the circular pipe depression caused by the falling of the block stone becomes smaller and smaller
When the falling height of block stone H = 7m and the wall thickness h = 24mm, the depression deformation value of UHMWPE tunnel escape pipe δ = 0
048m, about round   8% of the pipe diameter; When the falling height h = 5M and the wall thickness h = 24mm, the sag deformation value  & Delta; = 0
038m, smaller deformation value
At this time, after the UHMWPE tunnel escape pipe is deformed and sunken, the passage in the pipe   The space is 588mm, meeting the ergonomic requirements, and people can safely pass through the emergency passage
When the wall thickness is small, the deformation value increases, which may be unsafe% when the wall thickness is larger, although the safety increases, the pipe weight   It also increases, resulting in rising costs and difficult handling& Nbsp; Therefore, it is appropriate to take the wall thickness of UHMWPE tunnel escape pipe more than 24mm in the design& Nbsp;
Luoyang Zhongxiong Pipe Industry Co
, Ltd
PE pipe   UHMWPE pipe   Steel belt corrugated pipe   Tailings polyethylene pipe   Tunnel escape pipe
&Nbsp; 3PE anticorrosive pipeline
Address: Science Park, Luolong District, Luoyang City
Contact: Mr
Xu 18103795607
&Nbsp& Nbsp& Nbsp& Nbsp& Nbsp& Nbsp& Nbsp& Nbsp; Manager Liu 17796736567
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