Inspection of the Engineering Condition of Underwater Concrete Structures.

摘要

All civil works structures must be continually evaluated for structural safety, stability' and operational adequacy. This is particularly true for underwater structures partially because it is more difficult to establish existing damages than it is for structures above the water; and partially because the underwater failure of many structures, such as dams, can produce very serious loss of lives and property. The overall objective of this report is to present organized information essential to the evaluation and monitoring of the engineering condition needed for continued safety of underwater civil works structures. Specific objectives are: (a) to summarize the typical types of deterioration that occur in underwater concrete structures; (b) to provide engineering guidelines for inspecting the condition of underwater structures; and (c) to provide guidelines for interpreting inspection data. As recommended in the report, the inspection and evaluation of the engineering condition of underwater structures are preceded by a comprehensive review of the design of the structure and the construction techniques and materials used as well as its operation and maintenance history. Information is obtained from available engineering data on the structure and from onsite investigation. This report summarizes these activities, pertinent inspection procedures and techniques, and methods of evaluation used by the Corps of Engineers and the US Army Engineer Waterways Experiment Station. Methods and procedures that were developed by other agencies and individuals for the evaluation of concrete civil works structures are also included. Standardized and other methods that have proven satisfactory for inspection are emphasized. Methods that have potential for detection of the extent and cause of inadequacies in underwater concrete structures are also included.