This thesis is examining the foundations for onshore wind turbines where both the more convential method with a large concrete slab are investigated, but also alternative foundation methods are studied, mainly piled foundations. Different types of foundations is presented and discussed in which the design procedure consists of both manual calculations and numerical analyses. A case study of an 80 meter high wind turbine with realistic loads is presented. The study includes geotechnical and structural design for three different soil profiles, in which three different foundation methods are used.
The three cases are:
1. Strong and stiff moraine soil in which the most common foundation method with a spread
foundation is used.
2. A 20 m thick layer of clay that overlay the strong bedrock in which toe-bearing precast
concrete piles are used. In this case only the piles are assumed to bear the load.
3. Clay soil with the bedrock at considerable depth in which precast concrete piles are used as
cohesion piles. Both piles and the concrete slab are assumed to bear load in a so-called
piled-raft foundation.
For the three cases above, the same foundation slab is used, but for case 2 and 3 the slab is cast
on piles. The results of this study show that all three above-mentioned foundation methods are feasible, but for the third case the differential settlements are significantly big resulting in a horizontal displacement of the tower's top of 155 mm. The first case is the cheapest and easiest to perform, and is preferred if the geotechnical conditions permit that. The second case results in a relative small total pile length of 680 m, while the third case results in 3720 m in total pile length.
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Full Title : Estimating and Costing in Civil Engineering: Theory and Practice including Specifications and Valuation
Author: BN Dutta
Publisher : UBS Publisher's Distributor Ltd; 25th Edition (October 21, 2002)
Language : English
ISBN-10 : 817476383X
ISBN-13 : 978-8174763839
very good reference for practicing in engineering mathematics.(schuams series doesn't need to be introduced)
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Author: M. Forni | Size: 0.4 MB | Format:PDF | Quality:Original preprint | Publisher: ENEA-Italian national agency for new technologies, energy and sustainable economic development | Year: 2011 | pages: 8
The paper presents the world state-of-the-art of the Nuclear Power Plants (NPPs)
provided with seismic isolation and focuses on the main problems related to the
application of this technology to so peculiar structures, characterized by high
masses, large sizes and severe safety requirements due to the possibility of relevant
accidents with release of radioactivity and other extremely dangerous materials.
Difficulties in the application of seismic isolation to NPPs are mainly due to the lack
of specific standards and to the need of manufacturing and testing quite large
isolators and using interface components like pipe expansion joints.
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Development of Seismic Isolation Technology for the next-Generation lWRs in Japan
Author: yamamoto | Size: 0.7 MB | Format:PDF | Quality:Original preprint | Publisher: the institute of applied energy | Year: 2010 | pages: 21
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Seismic demands on secondary systems in base-isolated nuclear power plants
Author: Yin-Nan Huang Andrew S. Whittaker, Michael C. Constantinou and Sanjeev Malushte | Size: 0.8 MB | Format:PDF | Quality:Original preprint | Publisher: Wiley InterScience | Year: 2007 | pages: 21 | ISBN: DOI: 10.1002/eqe.716
SUMMARY
Numerical models of a sample nuclear power plant (NPP) reactor building, both conventionally constructed
and equipped with seismic protective systems, are analysed for both safe shutdown and beyond-designbasis
earthquake shaking at two coastal sites in the United States. Seismic demands on secondary systems
are established for the conventional and seismically isolated NPPs. The reductions in secondary-system
acceleration and deformation demands afforded by the isolation systems are identified. Performance spaces
are introduced as an alternate method for evaluating demands on secondary systems. The results show
that isolation systems greatly reduce both the median and dispersion of seismic demands on secondary
systems in NPPs. Copyright q 2007 John Wiley & Sons, Ltd.
Received 5 October 2005; Revised 15 April 2007; Accepted 17 April 2007
KEY WORDS: nuclear power plant; secondary systems; seismic base isolation; viscous dampers; performance
spaces
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This report describes the seismic base isolation (SBI) design of the 4S reactor building for
U.S. Nuclear Regulatory Commission (NRC) review as part of the pre-application process
toward eventual Design Approval (DA). In the expectation that 4S will be constructed in the
U.S., the design is intended to meet codes and regulations in the U.S. Currently, there are no
codes and regulations specifically for the application of seismic base isolation to nuclear power
plants in the U.S. Therefore, the present 4S seismic base isolation design is based not only on
existing U.S. codes and regulations, but also on a Japanese guideline for the application of
seismic base isolation to nuclear power plants.
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Posted by: david-smith - 06-04-2012, 11:36 AM - Forum: Archive
- No Replies
Please if anyone have the following Document in ENGLISH share to us:
Design and Technical Guideline of Seismic Isolation Structure for Nuclear Power Plant, JEAG 4614-2000,Japan Electric Association (JEA), Nuclear Standard Committee of JEA,
The reference website is (but have that in Japanese language not English):
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Architectural Utilities 3 - Lighting and Acoustics
Author: GEORGE S.SALVAN | Size: zip 79.31 MB | Format:PDF | Quality:Unspecified | Publisher: JMC PRESS, INC. | Year: 1999 | pages: 530 | ISBN: 971-11-1028-8
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