A monitoring program was conducted at Lockport Lock and at Brandon Road Lock to record any movement occurring at specific locations. Movement of Lockport monolith 63 was measured in comparison with monolith 57; tilt measurements were made on both monoliths. Extensometers were placed across existing cracks in a gallery through monolith 50. These measurements, with temperature data, were automatically recorded for a period of seven months. The results show monolith 63 to be stable relative to monolith 57 and the cracks in monolith 50 at the gallery to be opening. At Brandon Road Lock, fixed Whittemore gage points were installed across cracks. The gage points were read periodically by members of the lock staff and the data sent to the U. S. Army Engineer Waterways Experiment Station (WES) for analysis. The data show that existing cracks on Brandon Road Lock opened about 0.06 in. during this period. Readings continue on Brandon Road Lock. (Author)
Monitoring Deflection at Lockport and at Brandon Road Locks, Chicago District
1980
48 pages
Report
No indication
English
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