This book examines the role of the geotechnical baseline report (GBR) as a means of allocating and managing subsurface risks associated with subsurface construction.

MOP 154 explains the role of the geotechnical baseline report (GBR) in allocating and managing risks associated with subsurface construction.

This practice manual examines the Geotechnical Baseline Report (GBR) which establishes a contractual statement of geotechnical conditions anticipated during underground and subsurface construction. Emphasis is placed on large underground projects such as tunnels, underground chambers, shafts, subway stations, mine development, and deep foundation excavations that have a significant anticipated risk of differing site condition claims. Guidelines for what should be included in the GBR are provided, in addition to a checklist of items to consider, recommendations for the content and wording to be used in baseline statements to improve their clarity and precision, and examples of problematic and improved practice in stating baselines. The importance and benefit of ensuring compatibility between the GBR and other elements of the Contract Documents, with emphasis on the specifications, drawings, and payment provisions is also discussed.

Underground construction is more complex than ever. Demand for space is increasing, new technologies are constantly evolving, and more stakeholders are asserting influence. Yet one of the most challenging and frustrating characteristics of underground construction remains: often, contract language does not account for the unique nature of building underground. Recommended Contract Practices for Underground Construction is the first industry-wide effort to improve contract procedures in more than 30 years. Commissioned by the Underground Construction Association of the Society for Mining, Metallurgy, and Exploration, this manual is an indispensable resource for contractors, consultants, suppliers, and owners anticipating underground projects. The authors suggest better practices during all stages of a project, when decisions are made that can affect the contract positively or negatively. Part one focuses on the practices and disciplines that build the foundation for effective contracts during the early phases of a project. Part two discusses best practices for contract provisions, payment mechanisms, and dispute resolution. By following these recommendations, you'll reduce the mistrust and costly disputes that often arise from the contract process. The result will be improved relationships, better contracts, and, most importantly, projects that are most cost-effective for owners and more profitable for contractors.

Of geotechnical and geophysical -- pr) operies 160 -- 10.3 4 Design of tunnel linings 1 61 -- 10.4 Instrumentation of the CTRL North Downs Tunnel 164 -- 10.5 References 165 -- Appendix I Abbreviations and symbols 166 -- Appendix 2 Risk management 168 -- A2l Introduction 168 -- A2.2 Scope 168 -- A23 Risk register 169 -- A21. 1 When to use the risk register 169 -- A2.32 Whalt is it? 169 -- A2.3.3 Assessment process 169 -- A2.3.4 Key steps 169 -- A2.3.5 Risk assessment, qualitative or -- quantitative? 171 -- A2.3.6 R anaingt risk 175 -- A2.4 References 17.

Intermediate foundations are used as anchors for floating platforms and ancillary structures, foundations for steel jackets, and to support seafloor equipment and offshore wind turbines. When installed by suction, they are an economical alternative to piling, and also may be completely removed. They are usually circular in plan and are essentially rigid when laterally loaded. Length to diameter embedment ratios, L/D, generally vary between 0.5 and 10, spanning the gap between shallow and deep foundations, although these are indicative boundaries and the response, rather than the embedment ratio, defines an intermediate foundation. The first chapters introduce foundation types; compare shallow, intermediate and deep foundation models and design; define unique design issues that make intermediate foundations distinct from shallow and deep foundations, as well as list their hazards that mainly occur during installation. Later chapters cover installation, in-place resistance and in-place response, and miscellaneous design considerations. There is no general agreement as to which design methods/models are appropriate, so models should only be as accurate as the data. Therefore, several reasonably accurate models are provided together with comprehensive discussion and advice. Example calculations and over 200 references are also included. This is the first book dedicated to the geotechnical design of intermediate foundations, and it will appeal to professional engineers specialising in the offshore industry.