Problems with Rock Excavation Specification in Alberta
As a result of contract overruns and claims from classification, measurement, and payment for 'solid rock' excavation, Alberta Transportation and Utilities embarked...
Determination and Presentation of Subsurface Conditions for Design and Construction
A major problem in the design and construction of many engineering projects is the lack of adequate geotechnical information both for design and for determining conditions to be encountered...
Excavating, OSHA-Style
When the Occupational Safety and Health Administration implemented its new, tougher trenching guidelines in July 1990, the agency opened the door for inventive excavation techniques. Contractors...
Probabilistic Analysis of Soil Structures Using Finite Element Method
The authors have developed general-purpose stochastic finite element analysis system, which supports various types of correlation and computes safety index ? by first-order second-moment...
Smoothwall Blasting Planned for the Underground Research Facility at Yucca Mountain
At this time it is not known whether the Exploratory Shaft Facility (ESF) at Yucca Mountain, Nevada will be completely mechanically excavated, completely developed by drilling and blasting...
Force and Geometry Constraints in Robot Excavation
One interest in this research effort was to develop and test an automatic control approach to adjust machine motions to the force conditions encountered during excavation - essentially...
Longitudinal Channel Response Due to In-Stream Mining
This paper describes the analysis procedure developed for the Arizona Department of Transportation for the estimation of short-term longitudinal channel response due to in-stream mining....
World's Largest Caisson
The world's largest caisson (210,000 cy) forms the offshore cable anchorage for the 1,870 ft main span Tokyo Harbor Bridge. The bridge carries Metropolitan Expressway Route...
Replacing an Urban Foundation
Baltimore's new subway extension will pass close to a 6-story reinforced concrete building near the Inner Harbor. Its timber piling foundation was threatened by the dewatering...
Jet Grouting for Underpinning and Excavation Support
Jet Grouting as a new tool for underpinning and excavation support is presented, describing the systems of Jet Grouting and its advantages over conventional underpinning techniques. A...
Rock Excavation with Boom Mounted Hydraulic Impact Hammers
A hydraulic demolition hammer mounted on a common backhoe or excavator carrier has gained world wide acceptance in the construction industry as a viable alternative to blasting. This paper...
Rock Excavations in Downtown Toronto
The geology of Toronto area is somewhat complex due to the series of advances and retreats of the glaciers. The overburden deposits consist of materials laid down during the Wisconsinan...
Rock Excavation with Microwaves: A Literature Review
Research on the use of microwaves for breaking rocks started in the late fifties. In this paper, the principles of microwave heating and the possible mechanisms responsible for the breaking...
Movement Control of Excavation Support Systems by Iterative Design
Conventional design practice for excavation support systems emphasizes determination of loads and selection of structural components. This paper presents a method which uses movement control...
Performance of Different Retention Systems in Similar Soils
Performance behaviour of three deep braced excavations in a similar soil profile, in the Chicago area is described. At each site, different bracing systems were utilized. Methods used...
Integration of Research Into Design Practice
A widely held perception is that research results flow from the research community along the paths of professional publication into the design offices, where they find practical application....
Tunnel Talk
Much talk in tunnel circles has centered on various methods of tunneling, especially the new Austrian tunneling method, or NATM. To be a true tunneling method it must provide a description...
Augering Answers
Leaking storage tanks, a long time environmental problem, are now being addressed nationally with cleanup regulations. Clearly, inexpensive and quick remediations are needed. This article...
Rock Engineering at Cat Arm Hydroelectric Development
Cat Arm Hydroelectric Development in Newfoundland, Canada, develops 129 MW from 384 m of head. The project was constructed between 1981 and 1984 and comprises 5 large dams, 5 small dams,...
Adapting Tunneling to Rocks of the Sierra Nevada
Exploration programs were completed to select the most economical tunnel routes which are not only the shortest but are those which can be excavated by tunnel boring machines with the...
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