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Using the Dynamic Cone Penetrometer and Light Weight Deflectometer for Construction Quality Assurance
Author: John Siekmeier ; Cassandra Pinta; Scott Merth; Julie Jensen ;Peter Davich; Felipe Camargo; Matthew Beyer | Size: 7.3 MB | Format:PDF | Publisher: Minnesota Department of Transportation Research Services Section 395 John Ireland Boulevard, MS 330 St. Paul, Minnesota 55155-1899 | Year: 2009 | pages: 244 | ISBN: --
The final products resulting from this research implementation project are the specification target values for both granular materials and fine grained soils. For compacted granular material, the grading number and field moisture content are used to select the appropriate DCP and LWD target value. A sieve analysis is used to determine the grading number and an oven dry test or reagent test is typically performed to determine the field moisture content. For compacted fine grained soil, the plastic limit and field moisture content are used to determine DCP and LWD target values. In this case, the plastic limit is used rather than the grading number to classify the soil and is also used to estimate the optimum moisture content for compaction. In addition to these target values, this report provides further standardization of the testing procedures for both the LWD and DCP. This will ensure greater uniformity by personnel conducting these tests. Currently, the method for obtaining a DPI value is varied, involving different numbers of seating drops and measurement drops. Using three seating drops and five to ten measurement drops, depending on the material type, is recommended in this report. LWD testing includes variations as well and the Mn/DOT Grading and Base section is currently defining the seating depth and other aspects of the procedure for implementation during the 2009 construction season. The LWD device is currently non-standardized nationally, allowing manufacturers to develop different models, which produce different measurements. Because Mn/DOT has decided to establish predetermined target values it is necessary to select a specific LWD such that the buffer and plate stiffnesses are also constant along with the specified falling mass, peak force, and plate diameter.
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Posted by: utan - 11-26-2010, 11:16 AM - Forum: Famous Projects
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Leaning Tower of Pisa: Behaviour after Stabilization Operations
Author: John B. Burland,Michele B. Jamiolkowski and Carlo Viggiani | Size: 2.5 MB | Format:PDF | Publisher: International Journal of Geoengineering | Year: 2009 | pages: 14
It is well known that the foundations of the Leaning Tower of Pisa were stabilised using the method of
underexcavation to reduce the southward inclination of the Tower by about 10 percent in combination with controlling the
seasonally fluctuating water table beneath the north side. Having been closed to the public since early in 1990, the Tower
was re-opened in December 2001. The paper summarises the response of the Tower during the period of implementation of
the stabilisation works. Monitoring of the movements of the Tower has been continuing and the observations obtained since
2001 are presented. It is shown that over the six years between 2003 and 2008 the induced rate of northward rotation of the
Tower has been steadily reducing to less than 0.2 arc seconds per year. Similarly the rate of induced settlement of the
centre of the foundation has been steadily reducing and is approaching the background rate of settlement of the Piazza.
Piezometer measurements close to the north side of the foundation shows that the drainage system has been successful in
stabilising the groundwater levels beneath the north side of the Tower’s foundation. The paper concludes with a brief
discussion on the possible future behaviour of the Tower.
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Author: Ove Ditlevsen, H. O. Madsen | Size: 3 MB | Format:PDF | Publisher: First edition published by John Wiley & Sons Ltd, Chichester | Year: 2007 | pages: 370
Product Description
This book addresses probabilistic methods for the evaluation of structural reliability, including the theoretical basis of these methods. Partial safety factor codes under current practice are briefly introduced and discussed. A probabilistic code format for obtaining a formal reliability evaluation system that catches the most essential features of the nature of the uncertainties and their interplay is then gradually developed. The concepts presented are illustrated by numerous examples throughout the text. The modular approach of the book allows the reader to navigate through the different stages of the methods.
Language Notes
Text: English (translation)
Original Language: Danish
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A handbook covering a variety of analysis tools from the traditional to the most up-to-date. Of great practical use to civil, mechanical and aeronautical engineers, this book comprehensively covers a wide range of analytical techniques and includes workable examples and exercises in each chapter. Topics covered include:
· formulation of the equations of motion using the principles of both vector mechanics and analytical mechanics
· free vibration response
· determination of frequencies and mode shapes
· forced vibration response to harmonic and general forcing functions
· numerical integration of the equations of motion
· frequency domain analysis
· analysis of continuous systems
· wave propagation analysis.
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Water, Wastewater, Soil and Groundwater Treatment and Remediation
Author: Nelson L. Nemerow, Franklin J. Agardy, Joseph A. Salvato | Size: 17.9 MB | Format:PDF | Publisher: Wiley | Year: 2009 | pages: 400 | ISBN: 978-0-470-08303-1
First published in 1958, Salvato's Environmental Engineering has long been the definitive reference for generations of sanitation and environmental engineers. Approaching its fiftieth year of continual publication in a rapidly changing field, the Sixth Edition has been fully reworked and reorganized into three separate, succinct volumes to adapt to a more complex and scientifically demanding field with dozens of specializations.
Updated and reviewed by leading experts in the field, this revised edition offers new process and plant design examples and added coverage of such subjects as urban and rural systems. Stressing the practicality and appropriateness of treatment, the Sixth Edition provides realistic solutions for the practicing public health official, water treatment engineer, plant operator, and others in the domestic and industrial waste treatment professions.
This volume, Environmental Engineering: Water, Wastewater, Soil and Groundwater Treatment and Remediation, Sixth Edition, covers:
- Water treatment
- Water supply
- Wastewater treatment
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Are there anybody have ebook named "Handbook on Design of Piles and Drilled Shafts Under Lateral Load"? BY US Department of Transportation, 1984. Pls upload.
Posted by: Vladimir - 11-26-2010, 03:56 AM - Forum: EN
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Fire Resistance Tests
EN 1363-1:1999 - Fire resistance tests. General requirements
EN 1363-2 - Fire Resistance Tests - Part 2: Alternative and Additional Procedures
EN 1364-1:1999, Fire resistance tests for non-loadbearing elements — Part 1: Walls
EN 1364-2, Fire resistance tests for non-loadbearing elements — Part 2: Ceilings
EN 1364-3:2006 - Fire resistance tests for non-loadbearing elements. Curtain walling. Full configuration (complete assembly)
EN 1364-4:2007 - Fire resistance tests for non-loadbearing elements. Curtain walling. Part configuration
EN 1364-5 Fire resistance tests for non-loadbearing elements Semi-natural fire test for facades and curtain walling systems
EN 1365-1:1999 - Fire resistance tests for loadbearing elements. Walls
EN 1365-2, Fire resistance tests for loadbearing elements — Part 2: Floors and roofs
EN 1365-3-2000 - Fire resistance tests for loadbearing elements. Part 3. Beams
EN 1365-4:1999 - Fire resistance tests for loadbearing elements. Columns
EN 1365-5:2004 - Fire resistance tests for loadbearing elements. Balconies and walkways
EN 1365-6:2004 - Fire resistance tests for loadbearing elements. Stairs
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