Concrete and Rock Tests, Major Rehabilitation, Dresden Island Lock and Dam, Illinois Waterway, Chicago District. Phase I. Rehabilitation.
Abstract
Drilling and laboratory testing of concrete and foundation rock were carried out as part of a major rehabilitation at Dresden Island Lock and Dam. The work was performed to ascertain in the extent and cause of concrete deterioration, and to determine selected physical properties of the foundation rock. A small section of the lower approach wall is founded on seamy broken limestone while the rest of the structure appears to be founded on dense shale. Possible weak zones in the foundation are clay seams in the broken limestone and a shaley clay layer underlying the limestone. New concrete is present at a number of locations as patches or overlays; it is in good condition. Old concrete is lightly to severely deteriorated. About 80 percent of the exposed vertical surfaces in the lock and dam has been affected by frost action to varying degrees. The average depth of concrete deterioration in the lock walls is 0.7 ft; in the upper gate bays, 1.5 ft; in the arch dam future lock walls, 1.3 ft; in the spillway dam abutment, 1.0 ft; in the ice chute pier, 2.0 ft; in the head gate piers and sill, 1.0 ft; and in the upstream one-half of the tainter gate piers, 2.3 ft. Maximum depth of damaged concrete is 3.1 ft. The damaged concrete primarily resulted from cycles of freezing and thawing. The concrete beyond the damaged zones is structurally sound. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1980
- Accession Number
- ADA090278
Entities
People
- B. A. Pavlov
- G. S. Wong
- Richard L. Stowe