Tunnel construction technology and method, escape pipeline used before tunnel construction

&Nbsp; Tunnel construction technology and method: the installation position of the tunnel escape pipe shall be reserved in advance at the tunnel construction site for the escape pipe used before the tunnel construction
When the tunnel escape pipe passes through the heading platform, it shall be arranged along the steps
The overhead height and length of the pipe shall not affect the construction and shall be convenient for escape
The tunnel escape pipe shall be kept flat, dry and smooth after installation, and shall not be used for emergency escape
The length of the tunnel escape pipe set at the construction site shall not be less than 100m

Preparation before tunnel construction:
1
  The portal works shall be arranged as a whole with the adjacent works, and should be completed as soon as possible before the rainy season

2
before the portal construction, check the stability of the mountain above the side and front slopes, remove suspended rocks and deal with dangerous rocks

3
the slope shall be brushed in place at one time
It is not allowed to enter the tunnel after the slope is brushed on the upper half section
In this way, it is easy to cause cave in when the lower half section is brushed after entering the tunnel

Tunnel construction technology and method:
The quality of tunnel depends on the process quality
The process quality depends on the excavation, initial support and waterproof and drainage quality
The supervision can be strengthened if the initial support and waterproof and drainage quality are well controlled
The key point is the excavation quality
The excavation quality depends on the drilling and blasting quality, which means that in theory, the subsequent initial support quality can be guaranteed without over and under excavation
Therefore, the quality of tunnel depends largely on the quality of drilling and blasting, Requirements for splitting blasting:
(1) The crack shall be penetrated and have a certain crack width on the surface
For medium hard rock, the joint width should not be less than 1
0cm; The crack width of hard rock should reach about 0
5cm; However, when the width of the joint on the soft rock reaches more than 1
0cm, the damping effect is not significantly improved
Some field tests should be done to summarize the experience

(2) The unevenness of the pre split surface after excavation should be greater than 15cm

(3) The hole trace retention rate on the presplitting surface shall not be less than 80%, and there shall be no serious blasting crack in the rock near the hole

Relevant requirements for setting of tunnel escape pipeline:
1
  The construction site shall be provided with adequate ventilation, tunnel escape pipes and alarm facilities as required

2
the operation time limit system shall be implemented for the construction of tunnel works, and the work with high risk shall be stopped at night

3 in terms of tunnel escape pipe support, the construction unit shall strictly manage the tunnel construction support construction process, and it is strictly prohibited to support lagging and safety step mark

4
the construction unit shall select qualified units to carry out hydrogeological prediction and monitoring measurement before the tunnel
The former geological prediction and monitoring measurement units shall improve the quality of prediction and monitoring, and timely and accurately feed back to the entrants

5
in terms of tunnel collapse, a special safety construction scheme shall be prepared, a tunnel safety team shall be established, and sufficient safety personnel shall be allocated

6
the construction unit shall formulate emergency response plan as required, establish emergency rescue team, allocate emergency rescue personnel, etc
, and regularly organize emergency escape drills for the construction, supervision and design units

7
if possible, carry out mechanized operation to reduce the number of operators
Tunnel escape pipeline above 1km
The entry and exit of tunnel personnel and vehicles below 1km shall also be regulated, and irrelevant personnel are strictly prohibited

Our Zhongxiong pipe industry does not sell pipelines, but safety and life pipelines; As a manufacturer specializing in the production of ultra-high molecular weight escape pipes, Zhongxiong Pipe Co
, Ltd
has been fully serving many projects such as traffic tunnels, hydraulic tunnels, municipal tunnels, mine tunnels, mountain tunnels, etc
for many years
Zhongxiong Management Co
, Ltd
has served more than 600 customers in more than 30 provinces and cities across the country
Its products have been highly praised by the majority of customers, and it has established a good cooperative friend relationship with the majority of customers
The products are good, and the service makes customers feel at ease

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
Service hotline: 0379-61292158
Qq:314088970
Email: zhongxiongguanye@163
com
Website: www
zhongxiongguancai COM
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