The BTS Specification for Tunnelling has become the standard industry document for tunnelling contracts, and forms the basis of tunnelling specifications for projects throughout the world. The specification has been revised in this third edition to reflect current industry best practice and to take account of the many advances in the field of tunnelling which have occurred over the last decade. Coverage of sprayed concrete has been expanded in recognition of its increased usage around the world and there are new sections on sprayed applied waterproof membranes and jacked box tunnelling. All references to codes, standards and other design documents have been comprehensively updated. Drafted by an expert editorial committee with more than 250 years experience in the tunnelling industry between them, Specification for Tunnelling, 3rd Edition will continue to be the de facto standard reference work for tunnelling in the UK and rest of the world.

Monitoring is a subject of particular importance to underground construction works. It is often a key risk mitigation measure both for the control of the construction process and the protection of existing assets affected by excavations. The subject is treated at the level of key principles, focusing on objective setting, strategic planning and the high level specification of monitoring systems. It aims to help avoid problems, which have in the past arisen due to omissions in these areas. This guide is structured to reflect the key stages in a project. It starts with objective setting and then addresses requirements for system planning, specification, design, operation and management. It also seeks to highlight the roles and responsibilities of the various stakeholders at each stage. Six illustrative case studies taken from a range of projects of different scales highlight the critical role of strategic and well-planned monitoring programmes in the success of any underground construction project.