Underwater Investigations: Standard Practice Manual by Kenneth M., Jr. Childs

By Kenneth M., Jr. Childs

This guide offers advice for these excited about underwater structural inspection. It provides directions representing criteria of perform, documentation and reporting, and administrative issues for numerous inspection varieties, together with new building, baseline, regimen, fix layout, specific, fix building, and postevent inspections. the 1st of numerous large appendices offers guidance for the inspection of certain underwater constitution kinds, together with bridges, open-piled constructions, gravity and holding buildings, marinas, hydraulic buildings, pipelines and conduits, dry docks, locks and gates, floating buildings, breakwaters, tower bases, moorings and anchors, tanks and garage amenities, and cathodic security structures. next appendices contain varieties and motives of defects and deterioration typically present in underwater concrete buildings, metal constructions, wood constructions, masonry constructions, composite structural parts, and undermining and scour; references for acquiring in-depth details at the constitution varieties; and an intensive thesaurus of key phrases.

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This section should include the results of the underwater inspection, any special testing accomplished in the field, and the results of any laboratory testing. The inspection information should be reported in a factual manner without comment or analysis at this time. This section serves as the basis for further assessment and evaluation and should contain only data that is reproducible and would be accepted by another competent engineer conducting a similar inspection. These results should be documented with notes, sketches, still photography, and videotape as appropriate.

Such defects should be thoroughly documented using both measurements and photos for later review and decisionmaking. 4. Typically, the structure should be ready to have bid documents prepared at this stage, using the results of the repair design inspection. 1 Objectives Special inspections should be conducted with a specific purpose in mind. 2 Methods of Inspection and Documentation Special inspections may include field testing, laboratory testing, laboratory analysis, or a combination thereof.

1. The minimum inspection sample size for small structures shall include at least two components of each underwater component type. 2. Large (or solid-faced) elements may include bulkheads, retaining walls, dam fascia, tunnel and pipeline walls, piers, gates, and tank walls. 34 UNDERWATER INVESTIGATIONS In some cases, the objectives of the routine inspection may be expanded to include such issues as estimating the remaining useful life of the structure or developing order-of-magnitude estimates of probable costs for the rehabilitation work.

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