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Compression Rings Support Deep Cut

by C. Lal Lalwani, (M.ASCE), Principal; Barber & Hoffman, Inc., Cleveland, Ohio 44115,


Serial Information: Civil Engineering—ASCE, 1982, Vol. 52, Issue 12, Pg. 50-51


Document Type: Feature article

Abstract:

The plans for building the Cuyahoga Valley Interceptor Lift Station in Cleveland, Ohio, called for 126 ft. (38.4 m) by 105 ft. (32 m) construction, some 80 ft. (24.4 m) below grade. Bracing of this large and deep excavation was done by four reinforced concrete compression ring beams (largest of this kind in the United States). Clear and uncluttered working space within the excavated area was an expedient way to build the concrete framed Interceptor Lift Station. The complex design of the ring beams was done keeping in consideration the uneven loading patterns due to excavation procedures and due to non-uniform soil properties. A close coordination between design assumptions and the Contractor's operations was a must for the success of the project. Inclinometers were installed to monitor the mass movement and the stability of the soil.

Subject Headings: Excavation | Space stations | Soil properties | Reinforced concrete | Concrete beams | Compression | Soil stabilization

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