By Martin Wieland, Qingwen Ren, John S.Y. Tan
content material: Foreword Preface convention association historical past of the convention Keynote papers restrict states overview for earthquake resistance of gravity dams in accordance with crack propagation research non-stop compaction keep watch over (CCC) for fill dams and curler compacted concrete dams a few fresh leading edge ideas within the layout and development of excessive dams in China layout and examine at the format of the 3 Gorges venture of the Yangtze river improvement of thought and strategies on excessive dam structural research Dynamic and pseudo-static failure analyses of embankment dams Summarization of Xiluodu concrete arch dam layout Dam protection elements of reservoir-triggered seismicity advantages of sturdy movement instrumentation of enormous dams Technical papers writer index
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Additional info for New developments in dam engineering : proceedings of the 4th International Conference on Dam Engineering, 18-20 October 2004, Nanjing China
Behavior of motion Periodic Chaotic Cycle* Interaction drumsoil Application of CCC Operating condition Contact 1 Continuous contact Yes Partial loss 1 Partial uplift Yes of contact 2(4) Double jump Yes [2(4)] Rocking motion No – Chaotic motion No * Specified as a multiple of excitation cycle T=2π/ω0 . No proper compaction is possible then. The compaction of recycling material, waste products and of special concrete (RCC) can also be controlled by this method. Soil deformation in three depths according to the impact of a vibratory roller drum operating in the condition “double jump”.
CCC possesses the essential advantage that the measuring equipment can be easily mounted on vibratory or oscillatory rollers (smooth rollers or sheep foot rollers). CCC has proved suitable on many construction sites, and has therefore become obligatory for several years already in Austria: (mainly for federal roads and highways, but also for railways and clay liners of waste deposits, and for embankment dams). 0m (and even more). High quality compaction provides numerous advantages for fill dams (embankment dams): • Increase in safety; • Improvement of serviceability; • Increase in lifetime; • Reduction of costs and maintenance; • Reduction of construction time (especially in the case of rollerintegrated continuous compaction control).
The acceleration of the drum the energy Weff is calculated as follows: (3) The integration is performed by two cycles of excitation in order to take the operating condition of double jump into account. Dynamic compaction values OMEGA, CMV, RMV versus dynamic shear modulus. Therefore, the particular operating condition has to be recorded in practice in order to correctly interpret the dynamic compaction values. The plastic contact zone is described separately for noncohesive soils. Interaction vibratory roller—noncohesive soil The model is described taking into account the elastic behavior of soil in the far field, elastic plastic properties of the contact zone and the most important roller parameters influencing the system.
New developments in dam engineering : proceedings of the 4th International Conference on Dam Engineering, 18-20 October 2004, Nanjing China by Martin Wieland, Qingwen Ren, John S.Y. Tan