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Performance of suction caisson ancho...
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El-Sherbiny, Rami Mahmoud.
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Performance of suction caisson anchors in normally consolidated clay.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
Performance of suction caisson anchors in normally consolidated clay./
作者:
El-Sherbiny, Rami Mahmoud.
面頁冊數:
352 p.
附註:
Advisers: Robert B. Gilbert; Roy E. Olson.
Contained By:
Dissertation Abstracts International66-12B.
標題:
Engineering, Civil. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3203538
ISBN:
9780542490255
Performance of suction caisson anchors in normally consolidated clay.
El-Sherbiny, Rami Mahmoud.
Performance of suction caisson anchors in normally consolidated clay.
- 352 p.
Advisers: Robert B. Gilbert; Roy E. Olson.
Thesis (Ph.D.)--The University of Texas at Austin, 2006.
As the demand on energy rapidly increases, oil companies extend their search for oil and gas into deeper waters in which floating structures are most economical. These structures are tied at the seafloor with anchors that can sustain loads from waves, storms, and currents. Suction caissons are anchors that utilize the large water pressure in deepwater during anchor installation, making it an efficient and economic alternative to driven piles. In places all over the world, suction caissons are widely used as foundation anchors in normally consolidated and lightly overconsolidated clays for a variety of deepwater structures. Suction caissons in offshore applications are subjected to a wide range of loading conditions. Loads are vertical in tension leg platforms, inclined in taut mooring systems, and mostly horizontal in catenary systems. However, the load capacity of suction caissons is not well defined. Several analytical and numerical models have been published to estimate the capacity of suction caisson, but very little experimental data is available to support such models.
ISBN: 9780542490255Subjects--Topical Terms:
783781
Engineering, Civil.
Performance of suction caisson anchors in normally consolidated clay.
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As the demand on energy rapidly increases, oil companies extend their search for oil and gas into deeper waters in which floating structures are most economical. These structures are tied at the seafloor with anchors that can sustain loads from waves, storms, and currents. Suction caissons are anchors that utilize the large water pressure in deepwater during anchor installation, making it an efficient and economic alternative to driven piles. In places all over the world, suction caissons are widely used as foundation anchors in normally consolidated and lightly overconsolidated clays for a variety of deepwater structures. Suction caissons in offshore applications are subjected to a wide range of loading conditions. Loads are vertical in tension leg platforms, inclined in taut mooring systems, and mostly horizontal in catenary systems. However, the load capacity of suction caissons is not well defined. Several analytical and numerical models have been published to estimate the capacity of suction caisson, but very little experimental data is available to support such models.
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Laboratory tests were conducted in an experimental facility specially built to study the behavior of suction caissons under axial, horizontal, and inclined loading conditions. The experiments were performed using two 4-inch diameter prototype caissons inserted to a depth of 32 inches in normally consolidated kaolinite. The tested prototypes are representative of caisson geometries commonly used in mooring systems for deep offshore locations having soft seafloor sediments. The first prototype caisson had a padeye bar along its lower half to allow for horizontal and inclined loading below mudline. The second prototype caisson was built from two thin tubes forming a double-walled caisson capable of providing separate measurements of the components of axial capacity. Instrumentation was used to measure loads, displacements, tilt, and pore water pressure for loads ranging from horizontal to vertical. In most tests, the caissons were inserted into the test bed soil half way using deadweight followed by suction insertion to full penetration. In some axial loading tests, the caisson was inserted by deadweight to full penetration for comparison. The caisson was loaded rapidly after allowing for sufficient setup time. Tests were also conducted with partial setup times to examine the effect of setup on the axial capacity. The caisson top cap was sealed in all horizontal and inclined tests, while axial loading tests were conducted with sealed and vented top caps. (Abstract shortened by UMI.)
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http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3203538
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