Tunnel grouting record pumped up in Los Angeles

Article Abstract:

Necessity enabled the engineers of the Los Angeles North Outfall Replacement Sewer project to design machines that could grout concrete at a fast pace. The pipe replacement project required grouting to keep the pipe aligned, prevent settling and help it withstand outside vibrations. Cellular concrete was used for its ability to fill up spaces and compress without being destroyed. The engineers developed their own pumping machines and foam-injection plant which they used to transport the concrete and make the desired concrete mixture.

Usage, Innovations, Sewer systems, Grouting, Maintenance and repair, Lightweight concrete

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Masonry sewer rehab

Article Abstract:

St. Louis, Missouri is rehabilitating some of its oldest masonry sewers to comply with clean water regulations. Many methods are being used to renovate the sewers, including cured-in-place pipe, reinforced shotcrete, and slip lining. The improvements will bar dry-weather sewage overflows during high-river stages on Mississippi River.

Buildings and facilities, Remodeling and renovation, Masonry, Saint Louis, Missouri, Combined sewers, Combined sewer overflows

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