One of the largest database of Construction tenders, infrastructure tenders .... Construction and Civil Works Tenders - Home Page  Construction Tenders Contact Us  Frequently asked questions 
Civil Works, Construction and Infrastructure Tenders Bids Contracts Proposals Projects News and Business Opportunities Bridge Construction Tenders Contracts Bids Dam Construction Tenders Contracts Bids Hotel Construction Tenders Contracts Bids Highway Construction Tenders - Roads Construction Tenders Contracts Bids Airport Construction Tenders Contracts Bids Civil Works Construction Tenders Contracts Bids Infrastructure Development Tenders Contracts Bids
Home View All Search Dashboard Free Tenders Subscribe Contact
Infrastructure Tenders Contracts Proposals
Construction Tenders Proposal Projects Bids Global Construction Projects Tenders World Tenders Building Tenders and contracts

Tunnel Construction Tenders


Tunnels are dug in various types of materials, from soft clay to hard rock, and the method of excavation depends on the ground conditions.

Cut-and-cover is a simple method of construction for shallow tunnels where a trench is excavated and roofed over. A strong overhead support system is required to carry the load of the covering material.

The Seikan Tunnel in Japan is the longest rail tunnel in the world at 53.9 km (33.5 mi), of which 23.3 km (14.5 mi) is under the sea.

The Channel Tunnel between France and the United Kingdom under the English Channel is the second-longest, with a total length of 50 km (31 mi), of which 39 km (24 mi) is under the sea.

The Lötschberg Base Tunnel in Switzerland is the longest land tunnel, with a total of 34.5 km (21.4 mi).
 
Advertise on CWC Tenders
Advertise on CWC Tenders
Global Construction Tenders
Building Tenders
Construction Projects
Construction Contracts
CWCTenders.com is one of the largest and most comprehensive source of International as well as national tenders, bids, RFP's, contracts, upcoming projects information, procurement news business opportunities worldwide - related to construction, civil works, infrastructure industry etc. Building construction contracts bids tenders proposals RFPs RFQs procurement projects opportunities