[New Elements Project] Hangzhou Xiangjisi Road West Extension Tu

Project name: Hangzhou Xiangjisi Road West Extension Tunnel Project

 

Products used: tunnel fireproof board 10mm

 

Product usage: 90000 square meters

 

 

 

 

The fire in the tunnel has always been a "sound of color" and is a disaster that cannot be ignored. Once it occurs, it is often more difficult to deal with than the danger in an outdoor or ordinary building, and the loss caused is also greater. heavy.

 

 

 

 

Due to the large traffic volume in the tunnel, fire prevention measures are particularly important, and a fire in the tunnel will cause damage to the tunnel structure and endanger life and property.

 

People usually think that the concrete structure is non-combustible, and you don’t need to consider fire protection. However, when a fire occurs in the concrete structure, when the ambient temperature rises to about 600°C,

 

The strength of concrete will drop by 50%. With the continuation of the fire, the moisture of the concrete will begin to dehydrate, causing it to peel off from the steel bars, peeling off piece by piece, forming bursts and endangering the service life of the tunnel.

 

 

The figure 18J811-1 (2019 revised edition) of the National "Code for Fire Protection Design of Buildings" stipulates that the fire protection design of urban traffic tunnels should comprehensively consider factors such as the composition of the traffic in the tunnel, the use of the tunnel, the natural conditions, and the length.

 

The fire resistance limit of the load-bearing structure of the tunnel shall comply with the regulations: the determination of the fire resistance limit of the load-bearing structure of the first and second types of tunnels and the third type of tunnels passing motor vehicles shall meet the requirements of Appendix C of this code;

 

For the first and second types of tunnels, the fire heating curve should conform to the RABT standard heating curve of relevant regulations, and the fire resistance limit should not be lower than 2.00h and 1.50h respectively;

 

For Class III tunnels that pass motor vehicles, the fire temperature rise curve should conform to the specified HC standard temperature rise curve, and the fire resistance limit should not be less than 2.00h.

 

A new element of the Bote board tunnel fire protection system was selected for the West Extension Tunnel Project of Xiangjisi Road, Hangzhou.

 

The system has passed the RABT and HC heating curve standard test of the National Fireproof Building Material Quality Supervision and Inspection Center, and the fire resistance limit is not less than 3h.

 

It can effectively protect the concrete structure from being damaged within a certain period of time, thus gaining time to put out the fire.