PCCO India, a Tunnel Construction, EPC &PMC, can provide a full range of geotechnical services to route and concept selection, design, construct and manage tunnelling projects, from soft soil to fractured rock terrain. This includes field geotechnical, laboratory testing, ground movement prediction and mitigation etc.

Our Tunnel design and safety consultation team is specialized in tunnel ventilation design, smoke dispersion, fire detection and suppression, and control and safety systems. We also know about the development of specialist repair schemes and damage, Methodology, and number of fronts.
As one of the best Tunnel designing companies in India, our expertise is to classify subsurface materials with relation to their excavation and support performance in tunnels in soils and rock. We identify new trends in tunnelling and understand the appropriate tunnelling method and tunnel lining system for a given situation. Our Cut and cover tunnel Design Company also selects and specifies suitable investigation techniques and equipment for tunnelling. We have mastered tunnelling techniques, Tunnel architecture design, and their applicability in certain soils while considering various physical constraints. Mitigation of the inevitable risks involved in tunnelling will also form an important part of our design scheme.

A. Type of Tunneling

• Cut-and-cover tunnel, constructed in a shallow trench and then covered over.
• Immersed tube tunnel, sunk into a body of water and laid on or buried just under its bed.
• Bored tunnel, constructed in situ, without removing the ground above. They are usually of circular or horseshoe cross-section. Some concepts of underground mining apply. Modern techniques include Shotcrete used in the New Austrian tunnelling method, use of a tunnel boring machine (TBM) or tunnelling shield. But still tunnels are constructed which are secured with pit props and shoring and then are steined or timer supports are set. Techniques known from barrel vaults are helpful.