Construction and application of Shanghai steel escape pipeline tunnel

  Aixihu tunnel starts from Jingdong Avenue in the West and Chuangxin 1st Road in the East, with a total length of about 2
6km
The main line of the tunnel (Huzhong section) is 29m wide and is positioned as an urban trunk road
Aixihu tunnel is a two-way six lane tunnel
The West Bank of the tunnel is connected to torch street and connects with Jingdong Avenue, Jinlu road and Gaoxin seventh road
A group of access ramps are set on Jinlu South Road and Jinlu North Road
The open section on the east side is 62m wide
The East Bank of the tunnel is connected with aixihu Road 2, Changdong Avenue and Chuangxin Road 1
The West open section is 60m wide

 
The tunnel is located in Chuxiong Prefecture, with a total length of 11
3 kilometers
It is a key control project with great difficulty in the construction of the whole line
Since the commencement in April 2014, in order to ensure the construction progress, China Railway 19th Bureau has excavated nearly 3km long inclined shafts 1 and 2, thus increasing the number of tunnel excavation faces from 2 to 6
However, it took more than two years to open two inclined shafts alone
In addition, due to the high mountains and deep valleys around the tunnel, inconvenient transportation and narrow site, the construction access road built for the transportation of construction personnel, machines, equipment and materials is more than 110 km long

The construction management of expressway tunnel project is complex and the construction environment is complex and changeable, so the construction safety management and quality control are particularly important, which requires the project department and the supervision unit to comprehensively coordinate the cooperation ability of all work links from the whole project, so as to ensure the safe and high-quality construction of tunnel engineering
Expressway tunnel is a special engineering structure, which is connected with subgrade Outside the bridge, tunnel construction is a common large-scale project in highway construction

Advantages of using ultra-high polymer escape pipeline:
1
It has unparalleled impact resistance, compression resistance, wear resistance, aging resistance, light weight, chemical corrosion resistance, sanitation and not easy to adhere to other engineering plastics

2
Light weight, only about 1 / 8 of the weight of steel pipe, convenient disassembly and handling

3
The pipeline has good toughness and high impact strength
It deforms instantly when impacted by strong external force, absorbs a large amount of impact energy, and then quickly returns to its original shape, which provides a safe guarantee for life-saving and emergency rescue in highway tunnel construction

4
The pipeline ring has high stiffness, good pressure resistance and is not easy to deform
In case of collapse in highway tunnel construction, the pressure bearing capacity and anti environmental damage capacity are far higher than those of ordinary pipelines

 
Design of tunnel escape pipeline
1
Structural dimension design of light tunnel escape pipe
  When crawling through the bottom entrance and exit of the circular hole with full body access, the small value of the circular pipe is 585mm At the same time, considering the actual situation of the highway tunnel construction site, the outer diameter of the tunnel safety construction escape passage should not be too large, otherwise it will have a great impact on the construction
Therefore, the outer diameter of the tunnel safety construction escape passage is taken as 800mm (or 860mm)

2
Design of light and thick escape tunnel
  When the thin-walled circular tube is impacted laterally by the high-energy block stone 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
After a large number of data tests (as evidenced by video), it is appropriate to take the wall thickness of (New) life-saving pipeline as 30mm in the design
(therefore, the specification of life-saving pipeline is 800 * 30 or 860 * 30)
3
Design of connecting parts of light tunnel escape Pipeline ,
  Based on the principle of convenient disassembly and assembly, the connection between the tunnel safety construction escape passage and the tunnel safety construction escape passage is hoop connection
Therefore, it is more convenient in the installation and construction organization
When installing for the first time, it is only necessary to butt the two pipes, fasten them firmly with the hoop, and drill holes into the pipe according to the existing holes of the hoop, close to the bolts
Among them, the end of the steel wire rope and the end of the iron chain are hooks, and the length of the iron chain can be freely adjusted by the position of the hook on the iron chain ring according to the fastening degree

The tunnel escape pipe joint is an important part connecting the tunnel escape pipe
Whether the connection is firm or not is related to the use effect of the escape pipeline
The use, connection and disassembly of the escape pipe joint are related to the construction efficiency!
  The ultra-high polymer tunnel escape pipeline used in tunnel construction not only conforms to the engineering principle and takes into account the firmness, but also needs to meet the practical requirements of the tunnel construction site
The connection mode is required to be simple, convenient and fast
For this reason, the tunnel emergency passage adopts:
1
Ring steel hoop connection
The steel hoop connection is firm and simple
Three bolts are prepared for connection

2
The connection of flower basket and the butt joint can be adjusted and controlled at will, with high adjustability and activity, which is suitable for the needs of uneven site and high laying requirements in the tunnel

3
U-shaped card and chain buckle connection
There are 3 U-shaped cards at both ends of each, and chain buckle connection is prepared

4、135° The transition steel anti-corrosion elbow is connected, and the upper two steps in the tunnel are equipped with two elbow transitions to keep the pipeline straight

Every 120 DEG inside the pipeline; A climbing rope is prepared, as well as supporting materials such as flat escape vehicle and emergency rescue box
In case of tunnel collapse, the trapped personnel can climb in the escape passage and escape smoothly

Luoyang Guorun New Material Technology Co
, Ltd
is a high-tech enterprise integrating R & D, production, sales and installation of new materials
It mainly produces ultra-high polymer pipes, steel lined ultra-high polymer polyethylene pipes, mud pipes, sand pumping pipes, escape pipes, ultra-high polymer tunnel escape pipes, tunnel escape pipes, steel belt pipes, steel belt corrugated pipes, steel belt reinforced polyethylene spiral corrugated pipes, rubber lined pipes, plastic lined pipes, steel lined plastic pipes, HDPE pipes and 3PE anti-corrosion pipes, Inner epoxide, outer PE anticorrosive pipeline, power pipeline, polyethylene floating body and other pipe series products
Service details: Sun Zong 185-3886-9025 , 0379-65227507
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lynmgd
com
Service address: North District, Airport Industrial Park, Luoyang City, Henan Province