Grouting against hazwaste

Article Abstract:

Grout curtains, designed to fit specific geohydrologic conditions, can help contain contaminated-groundwater recovery sites. They can keep offsite water out while extending capture zones for onsite water that have spread out. This new method of hazardous waste isolation proved effective at the Necco Park industrial landfill in Niagara Falls, NY, which a has down-gradient groundwater recovery system. Woodward-Clyde Consultants, using US Geological Survey studies, designed a three-sided single-row grout curtain with bleed, viscosity, permeability and chemical properties suited to site conditions.

Innovations, Hazardous waste management industry, Woodward-Clyde Consultants

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Compensation grouting

Article Abstract:

Compensation grouting was used to control ground movement during tunneling of a sewer below Toronto's Spadina subway line in difficult soil conditions. The construction of the sewer involved a 3-m diameter Lovat TBM, an ungrouted steel rib and wood lagging initial lining and a cast-in place concrete final lining. Compensation grouting involves the injection of grout simultaneously with tunneling to minimize the tendency for deformations. Rigorous testing of the grouting and monitoring systems facilitates the settlement of the subway.

Sewer systems, Design and construction

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Grouting to great depths

Article Abstract:

The Alabama Power Co used a special formulated grout and a combination of rotary and percussion drilling methods to stop leaks as deep as 131 m beneath the Logan Martin Dam on the Coosa River in Birmingham, AL. The soil on which the dam was built is mostly made up of karst, which posed an engineering problem for the company. The company had to build a computerized grout batch plant to supply thousands of cubic meters of up to 40 different grout and filler mixes.

Electric utilities, Buildings and facilities, Maintenance and repair, Dams, Birmingham, Alabama, Alabama Power Co.

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