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New Way Out
An obsolete and hazardous ventilation/emergency-exit shaft on the banks of the Hudson River has been replaced with a deep, dual-shaft system that connects to a 100-year-old train tunnel...

Geotechnical Instrumentation for Repository Shafts
The United States Congress passed the Nuclear Waste Policy Act in 1980, which required that three distinctly different geologic media be investigated as potential candidate sites for the...

Ultrafine Cement Tests and Drilling Warm Springs Dam
Ultrafine cement was chosen by the Corps of Engineers for tertiary grouting the Warm Springs Dam because of its ultrafine particle size, low settlement, medium viscosity and longevity....

A Review of Drilling and Grouting Methods for Existing Embankment Dams
With the increasing emphasis being placed on dam rehabilitation and repair, more dam engineers are faced with the need to interface with drilling and grouting specialists. Regretfully,...

Diffusion of Carbon Dioxide Through Layers of the Unsaturated Zone at Yucca Mountain
The estimation of diffusive transport of gases through tuffs is important in order to asses the Yucca Mountain as an environmentally safe and acceptable repository for spent fuel and high-level...

Core and Reaming Bit Studies in Yucca Mountain Tuffs
The Site Characterization Project is a major part of the work in determining the suitability of Yucca Mountain as a potential high level waste repository. Over 100 exploratory drill holes...

Modeling and Analysis of Shafts and Tunnels for the SSC
A brief overview of the Superconducting Super Collider Project (SSC) is presented followed by a discussion of the 3D modeling and finite element analysis of tunnels and shafts. The sequential...

New Wells Safeguard Scenic Tahoe
Surface water for drinking and for snow-making is becoming scarce in the Lake Tahoe region, along the California and Nevada border. New Environmental Protection regulations regarding surface...

Coastal Management and Ocean Industries in East Germany, from Central Planning Ineffectiveness Towards Local and Regional Development Strategies
In so far, the preconditions for the implementation of decentralized development tools both in coastal management and in ocean industries may be quite ideal in East Germany: there is the...

Environmental Compliance and Offshore Oil and Gas Exploration and Production
The economic impacts of multiple environmental regulations of offshore oil and gas exploration and production are examined using an integrated, investment-production-regulatory model developed...

The Whole Picture: Federal Statutory and Regulatory Authorities Which Govern Oil and Gas Activities on the Alaskan Outer Continental Shelf
Oil and gas activities conducted on the Alaska Outer Continental Shelf (OCS) are subject to multiple Federal laws which result in safe operations and environmental protection. Lessees...

Resource Extraction Activities in the Coastal Zone?The Impact of Offshore Oil Production on Coastal Communities
There are few studies that examine the impact of offshore oil extraction on social problems, educational attainment and economic health of communities. The results of this study demonstrate...

An Ongoing Field Study to Evaluate the Impacts and Direct Effects of Offshore Dreding Activities on Benthic Organisms
Instrumentation and sampling involve box coring, otter trawling, the use of a towed sled carrying video camera, and a sidescan sonar device. The baseline collection phase of the study...

Hybrid Lifted Structure for the Collserola Tower
The structure of the 300 m. Collserola Tower is a hybrid system formed by three combined structural systems consisting of: - a very slender cylindrical concrete shaft: - a large steel...

Building the SSC: A Texas-Sized Challenge
Assuming it survives politically, the $8.25 billion Superconducting Super Collider could bring major new discoveries in the world of physics. For civil engineers, the Texas megaproject...

Drilling with Direction
Norfolk, Va.'s 48 in. diameter raw water main crosses three rivers in its 52,000 ft route. At the Elizabeth River, an aerial or subaqueous crossing was not feasible, so a...

Drilled Shaft Friction Evaluation via Pullout Tests
The history, development, and field test results of a small-scale 'pullout' test to assess the skin friction (f_su) for drilled shafts socketed in...

Drilled Shaft Side Resistance in Clay Soil to Rock
An evaluation is made of available field load test data for the axial side clay soils to hard rocks. Conventional total stress interpretations by the alpha method are used to examine the...

Bi-Directional Load Testing of Shafts to 6000 Tons
This paper describes the use of Osterberg cells (O-cells) to perform bi-directional load testing on full size production drilled shafts for a major bridge foundation near Owensboro, Kentucky....

Load Testing of Permanently Cased Drilled Shafts Founded in Hartford Shale
The axial and lateral load testing of three, 30 inch (76cm) diameter, permanently cased drilled shafts is analyzed herein. The prototype shafts were founded in (or on) Hartford Shale bedrock,...

 

 

 

 

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