ACI 376-11: Code Requirements for Design and Construction of Concrete Structures for the Containment of Refrigerated Liquefied Gases and Commentary by ACI Committee 376

Author:ACI Committee 376
Language: eng
Format: mobi
Tags: Concrete Construction
Publisher: American Concrete Institute
Published: 2013-05-01T04:00:00+00:00

10.8—Monitoring frequency

10.8.1 All monitoring systems and devices shall be capable of recording outside of normal operation ranges.

10.8.2 Settlement monitoring

10.8.2.1 Tank foundations shall be monitored and recorded at permanently installed benchmark points before, during, and after the hydrotest and periodically during the life of the facility, including during construction, during commissioning, and at least annually during operation. When the settlement monitoring exceeds predefined values, the engineer shall be notified immediately.

10.8.2.2 Upon foundation completion and before wall construction, the settlement monitoring benchmark points and inclinometers shall be surveyed and documented.

10.8.2.3 Inclinometers shall be monitored whenever settlement is measured and documented.

10.8.3 Thermal monitoring

10.8.3.1 Thermal system monitoring shall be performed during cool-down and in-service commissioning of the tank, at least weekly.

10.8.3.2 Evaluations of thermal performance of the foundation and bottom insulation shall be performed at 6 months after the tank is in service, and at least annually thereafter.

10.8.4 Seismic monitoring—The seismic monitoring system shall be regularly maintained at least twice a year at approximately equal time intervals to ensure satisfactory performance during earthquakes.

10.8.5 Corrosion monitoring—Corrosion control monitoring shall be performed twice a year at approximately equal time intervals.

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