Skip to main content

Case Studies Files

Case Study: Consolidating Weakly Cemented Sandstone During Cross-Cut Construction

Published Year: 1960

  • Problem: At Seafield Colliery, three cross-cuts, 16-17 feet wide by 12- feet high, were being driven horizontally through the Millstone Grit series, which contained many weakly cemented and porous sandstones.

Case Study: Constructing Grout Curtain for Dam

Published Year: 1960

  • The Columbia River Valley at the dam site is a wide canyon dividing the Columbia Plateau on the east from the Entiat Mountains on the west.

Case Study: Sealing Leaks in Coal Mine Slope

Published Year: 1960

  • During the winter months, small drips from the roof froze into large ice masses, obstructing the passage of men and equipment, and becoming a safety hazard.

Case Study: Controlling Seepage During Shaft Sinking

Published Year: 1960

  • In order to reach newly discovered lead deposits, St. Joseph Leak Company had to sink large diameter deep shafts through permeable Lamotte Sandstone carrying ground water at high pressures.

Case Study: Grouting Foundation for Dam Construction

Published Year: 1960

  • A 300-foot rockfill dam with a central impervious core and a crest length of 870 feet was being built on a generally sound granite foundation, except on the upper right abutment where the rock was completely weathered to an in situ soil.

Case Study: Stopping Water Infiltration in Sewer System

Published Year: 1960

  • Problem: Pipe and joint deterioration in the city’s 50- year-old sewer system had led to heavy infiltration. Estimated flow often exceeded 6 million gallons per day.

Case Study: Grouting in Fissured Rock

Published Year: 1960

  • Pumping costs at Cedar Bay Mine were becoming excessive, as new drifts were opened and total seepage into the mine increased.

Case Study: Stabilizing Running Sand During Pipe-Jacking

Published Year: 1960

  • Problem: A city water supply pipeline, 126 cm. in diameter, has to be placed under the Keiyo Highway in close proximity to an irrigation channel. The water supply pipe had to be placed without disturbing highway traffic.

Case Study: Shutting Off Water During Tunneling

Published Year: 1960

  • A six- foot diameter tunnel, 139 feet long, had to be driven through a cinder-slag fill with voids estimates as high as 70 percent. The tunnel dropped 25 feet over its length and terminated in a cofferdam about 23 feet below river level.

Case Study: Sealing Sandstone to Permit Shaft Sinking

Published Year: 1960

  • In one of the deepest drilling operations in British coal mining history, plans called for the sinking of two 3,000-foot shafts, one to be used as a main coal-hoist shaft with skips, the other to house a conventional cage hoist.

Case Study: Sealing Leaks in a Dry Dock

Published Year: 1960

  • Fitzroy Dry Dock, the oldest in Australia, was constructed in the days of sailing ships. Time and water pressure had eroded some of the jointing material, and sea water was entering the dock in a number of places.

Case Study: Repairs to Leaking Earthen Dam

Published Year: 1960

  • Indian Kill Reservoir is a man- made lake (capacity 200 million gallons.) serving a portion of Sterling Forest, a community developed for scientific research, education, and suburban living.

Case Study: Increasing Oil Production

Published Year: 1960

  • Problem: A petroleum production water flood project was not responding well to flooding. An injection profile indicated that about half of the injected water was entering the zone between the two perforated intervals.

Case Study: Improving Oil Production in a Water Flood Cave

Published Year: 1960

  • Problem: Water was pumped down a well to displace petroleum from the oil-bearing formation into an oil producing well.

Case Study: Grouting Jointed Rock in Dam Foundation

Published Year: 1960

  • Problem: Severe weathering along calcite veins, joints, and cracks, as well as the presence of three fault zones, have formed seepage channels which could endanger the performance of the dam.