Various Types of Waterproofing System of Tunnel

Waterproofing of tunnels is the most important matter of the tunnel industry. But due to the surrounding conditions it is very tough that tunnel is protected from groundwater percolation. Waterproofing system of tunnel requires different types of category like flexibility, exposure and stress condition. If waterproofing of tunnel not works well then it can’t protect tunnel from moisturizing. In result tunnel would get damaged and water, soil or chemicals enter inside of the tunnel.

Various problems of water infiltration

Infiltration of water inside of tunnel is the worst thing would happen to tunnel. ITA stands for International Tunneling Association. ITA provided a report about how infiltration of water can damage the whole system of tunnel.

This report is based on case histories taken from various countries. They also showed in this report about seventeen types of defects and different remedies. In urban areas there is one more problem. That is infiltration of chemical based water inside tunnel.

Criteria for good quality of waterproofing system

There are different criteria is necessary to meet the good quality of waterproofing system in tunnel. The criteria are mentioned below.

1. Different types of structure.

2. Various types of construction like cut and covered and bored.

3. Lowest mound of structure.

4. Maximum state of groundwater after construction.

5. Different surrounding environmental situations like Ph, hydrocarbon, chemicals at site.

6. Easy installation process.

7. Track record of the system.

8. Cost of construction.

9. Maintenance of waterproofing system.