Cables Not in Trouble
Cable-stayed bridges in the U.S. are not, contrary to reports widely disseminated in the press several years ago, about to fail from corrosion. The design, in which primary cables support...
Pipeline Rehab: Underground Options
While simply digging up old pipes and replacing them is sometimes still best, other alternatives can give long life while easing the strain on the community. Trenchless methods for on-line...
Watertight and Earthquake Resistant Joints for Diaphragm Walls
Different types of joints were constructed and tested in the field to evaluate the bond between concrete and partition plate, the effect of tremie pipe location to the quality of concrete...
Pumping In and Pumping Out: Case Histories of Fluidized Sand Bypassing for Channels and Beachface Dewatering for Beaches
New technologies can change management of sand in coastal areas. Fluidization, pumping in additional water beyond the quicksand point, makes a 50:50 sand-water slurry that will flow down...
Permeability of Cement Grout Plugs in Basaltic Rocks
Flow tests have been conducted on expansive cement grout plugs with diameters of 160 mm and 200 mm, and length-to-diameter ratios of one, in boreholes in basalt blocks, and in steel pipes....
Composite Liner, Leak Detection System, and Floating Cover for Nuclear Reactor Emergency Retention Basins
Existing reactor effluent basins are being retrofitted with composite liners, leak detection system and floating covers. Such basins have a 15-year life and remain empty until an accident...
Pressure-Time Flow Measurements Under Adverse Conditions
Theoretical analyses suggest that the pressure-time method is capable of accurately determining flow rate in the short, varying cross section, 'semi-scroll' penstocks...
Penstock Rehabilitation
The deterioration of aging penstocks is a common problem at many existing hydroelectric plants. A comprehensive understanding of the physical condition and functional limitations of an...
The Development and Writing of the ASCE Manual of Practice for Steel Penstocks
The 'Manual of Practice for Steel Penstocks' is being written under the supervision of the Hydropower Committee of the ASCE Energy Division. The committee felt...
Evaluation of Thermoplastic Drainage Pipe Designs in Europe and North America
The last 10 years have seen significant increase in the use of plastic pipe for drainage systems in North America in comparison to Europe. Many plastic pipe products have included corrugations,...
Flow Measurement in Irrigation Practice: State-of-the-Art
State-of-the-art flow metering developments for irrigation are reviewed. Selected older methods are updated with recent improvements. These include orifice meters, venturi meters, critical-flow...
Field Fabrication of Reinforced Plastic Pipes
A new technology allows fabrication of reinforced plastic pipe in the field, or the lining of existing pipe. The plastic used can be selected to meet job and site requirements. The reinforcing...
Evaluation of Embankment Erosion at TVA's Chickamauga Project
Studies were made to evaluate the extent of erosion to be expected under probable maximum flood (PMF) conditions. The erosion studies were made using the EMBANK computer program. The results...
Response of Ductile Iron Pipelines at Parkfield, CA to Loma Prieta Earthquake
A field experiment designed to investigate the performance of buried pipelines at a fault crossing has been constructed at Owens' Pasture near Parkfield, CA. The site was...
Seismic/Geologic Risks as Factors in Prioritizing Gas Pipeline System Replacement
During the past decade, Pacific Gas and Electric Company (PG&E) has intensified efforts to evaluate earthquake hazards and their potential effects on gas and electric power systems,...
Tension Bending Behavior of Buried Pipelines Under Large Ground Deformations in Active Faults
This paper deals with the tensile failure of buried pipelines subject to abrupt fault movements. The pipe is modeled as a thin cylindrical shell which is essentially semi-infinite. The...
Seismic Behavior of Buried Pipelines Through Field Observation
This paper presents seismic response characteristics of embedded pipes based on field measurements. Strains induced in steel pipe and ductile pipes with expansion joints are studied. Special...
Prediction of Seismic Damage to Water Supply Network
In this paper a method for predicting seismic damage to water supply network is presented. By taking the breakage of the joints of the pipeline caused by seismic wave propagating as main...
Restrained Underground Piping?Some Practical Aspects of Analysis and Design
This paper is a brief update of stress analysis techniques published earlier [1] to aid the analyst in qualifying continuous welded steel buried pipelines that are subject to seismic soil...
Seismic Analysis and Design of Buried Piping
Among the causes of damage to buried pipelines due to earthquakes, the one that is most complicated to analytically deal with and that is most credible at safety related sites such as...
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