Earth anchors
著者
書誌事項
Earth anchors
（Developments in geotechnical engineering, 50）
Elsevier , Distributed by Elsevier Science Pub. Co., 1990
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注記
Includes bibliographical references and index
内容説明・目次
内容説明
Anchors are primarily used in the construction of foundations of earth-supported and earth-retaining structures. The anchors are used in construction to transmit the outwardly-directed load to soil at a greater depth and/or farther from the structure. Although earth anchors have been used in practice for several hundred years, proper theoretical developments for purposes of modern engineering design have taken place only during the past twenty years or so. This book summarizes most of the theoretical and experimental works directed toward the ultimate and allowable holding capacity of earth anchors. The book contains six chapters with detailed discussions on horizontal, vertical and inclined anchor plates, helical anchors, and anchor piles. Discussions on the failure mechanism in soil located around the anchor, as well as various theories to calculate the ultimate and allowable loads, are presented. Laboratory and field test results which are required to supplement and verify the theories have also been included. This book is of interest to consulting engineers in geotechnical engineering, as well as geotechnical engineering researchers and engineering libraries.
目次
1. Anchors - General. Plate anchors. Direct embedment anchors. Helical anchors. Grouted anchors. Anchor piles and drilled shafts. 2. Horizontal Plate Anchors. Early theories. Recent solutions for anchors in sand: Net ultimate uplift capacity. Load-displacement relationship. Anchors subjected to repeated loading. Uplift capacity of shallow group anchors. Spread foundations under uplift. Inclined load resistance of horizontal plate anchors. Anchors in clay (phi = 0 condition): Ultimate uplift capacity. Factor of safety. Uplift capacity of anchors in layered soil. 3. Vertical Plate Anchors. Anchors in sand: Ultimate holding capacity from Rankine's theory. Recent development on shallow vertical anchors in sand. Nature of passive pressure distribution in front of a shallow vertical anchor. Deep vertical anchor. Load-displacement relationship. Design considerations. Effect of anchor inclination. Anchors in clay (Undrained cohesion, phi = 0): Ultimate holding capacity. Step-by-step procedure for estimation of ultimate load. Limitations of the existing study. 4. Inclined Plate Anchors. Inclined plate anchors in sand: Inclined anchors - axisymmetric case (analysis of Harvey and Burley). Meyerhof's procedure. Analysis of Hanna et al. Other empirical relationships. General remarks. Inclined plate anchors in clay (phi = 0 condition): Ultimate holding capacity. 5. Helical Anchors. Helical anchors in sand: Geometric parameters and failure mode. Net ultimate uplift capacity for shallow anchor condition. Net ultimate uplift capacity for deep anchor condition. Interference of closely-spaced anchors. Helical anchors in clay (phi = 0 condition): Failure mode in soil. Net ultimate uplift capacity. Use of in situ tests to predict uplift performance. 6. Anchor Piles. Piles in sand: Bored piles. Driven piles. Uplift capacity of inclined piles subjected to axial pull. Uplift capacity of rigid vertical piles under oblique pull. Uplift capacity of group piles. Factor of safety. Piles in clay (phi = 0 condition): Vertical piles subjected to axial pull. Load-displacement relationship for vertical piles subjected to axial uplift. Inclined piles subjected to axial pull. Uplift capacity of vertical piles subjected to inclined pull. Uplift capacity of group piles in clay. Index.
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