Design Guide for Drag Embedment Anchors

Design Guide for Drag Embedment Anchors
Author: R. Taylor
Publisher:
Total Pages: 71
Release: 1984
Genre: Anchorage
ISBN:

This design guide provides an overview to the selection and sizing of drag embedment anchors and mooring chains and to the diagnosis and solution of typical drag anchor performance problems. The site information required for anchor type selection is outlined. Two options for sizing the drag anchor are offered. The more exacting of the options includes a method for determining the mooring load resistance developed by that length of mooring chain embedded in and sliding on cohesive seafloor soils. Example problems of anchor system design on cohesionless and cohesive seafloors are provided. The last section outlines drag anchor performance problems and provides possible solutions. More detailed information can be found in the references.

Explosive Embedment Anchors for Ship Mooring

Explosive Embedment Anchors for Ship Mooring
Author: Henry C. Mayo
Publisher:
Total Pages: 39
Release: 1973
Genre:
ISBN:

A 50,000-pound nominal capacity (XM-50) explosive embedment anchor and a 200,000-pound nominal capacity (XM-200) explosive embedment anchor have been designed and tested by the Army for application in ship mooring. Tests include determinations of anchor penetration, ultimate holding capacity and short-term creep in most sub-bottom sediments except rock. Full scale mooring tests of a T-5 tanker and a Navy 1st ship have been accomplished successfully. Test results have been incorporated in optimizing the anchors' physical configuration and installing procedure. It is concluded that the two sizes of explosive anchors offer installing and operational advantages for ship mooring compared to conventional fluked anchors. Testing to date indicates that the explosive anchors will perform satisfactorily for ship mooring provided they are installed properly. (Author).

The Complete Book of Anchoring and Mooring

The Complete Book of Anchoring and Mooring
Author: Earl R. Hinz
Publisher: Cornell Maritime Press/Tidewater Publishers
Total Pages: 360
Release: 1994
Genre: Sports & Recreation
ISBN:

The Complete Book addresses anchoring systems, techniques, and permanent moorings for boats from 12 to 80 feet in length. It covers monohulls, multihulls, light displacement sailboats, cruisers, sportfishers, passagemakers, and workboats. In short, it is for all recreational and working boats in this size range. The book deals not only with anchor behavior, but also with the rode assembly, riding stoppers, and the human factors. What formerly was thought of as strength through size (heavy anchors and large rodes) has been refined to decrease weight, lighten loads on the boat, and reduce difficulty in handling. Utilizing a systems approach with respect to equipment and techniques and analytical methods for loads, Earl R. Hinz has made a number of contributions to the state of the art. Among them are bow anchor roller design, chain locker and navel pipe design, elastic anchoring techniques, tandem anchor systems design, and designs for permanent moorings. Sections on ground tackle selection, tandem anchoring techniques, anchoring in coral, and improving hurricane moorings have been revised. Most of these designs and techniques are clearly illustrated in the schematic drawings by Richard R. Rhodes. The latest information on electric windlass troubleshooting, new anchor designs, anchor test data, use of screw anchors for more secure moorings, design of moorings for coral seabeds, and anchoring jurisdictional conflicts makes this second edition a state-of-the-art source book for the boating world.

Geomechanics of Marine Anchors

Geomechanics of Marine Anchors
Author: Charles Aubeny
Publisher: CRC Press
Total Pages: 515
Release: 2017-09-18
Genre: Technology & Engineering
ISBN: 1351237357

This book provides a comprehensive guide for the analysis and design of anchor systems used for mooring offshore floating structures. Much of the experience is based on applications toward the offshore oil and gas industry, but the substantial potential for offshore renewable energy systems is addressed. The major types of anchors are described with respect to their basic design concept, advantages and limitations, appropriate framework for analysis, and observed performance. This book addresses all aspects of anchor behaviour related to anchor design including the installation performance, load capacity, deformation, and structural integrity of the anchor itself. Coverage is also provided of appurtenant components of anchor systems, in particular of anchor line/chain mechanics in the soil and water columns. Much of the material presented represents relatively new developments, including several new anchors which have been developed within the last decade, so the book will provide a useful compendium of information is largely scattered in journals and conference proceedings. This book is intended for engineers engaged in offshore geotechnics and marine engineers involved in mooring system and floating structure design. While the analytical methods presented in this text have a strong theoretical basis, the emphasis is on simplified computational formats accessible to design engineers.