A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cable-Supported Overhead Pipeline Crossings: Structure Assessment Plan
Pipeline crossings occur where an underground pipeline crosses over a waterway or other geologic depression instead of boring below the water or valley. One means of bridging the gap is by using cable-supported structures to carry the overhead pipeline from one side to the other. These structures typically are comprised of two tower frames, supported by concrete foundations, from which two main catenary cables are hung across the span with backstay cables anchored into the ground. Suspender cables hang vertically from the main cables, terminating at pipe hangers that directly support the pipeline. After many years of constant use, with only minor maintenance, these structures should be inspected to assess their current condition and determine their remaining useful life expectancy. Without this information, a potentially catastrophic scenario may unfold involving the full or partial collapse of the supporting structure and the potential for a breach in the pipeline. This paper illustrates the field inspection of cable-supported overhead pipeline crossings and the prioritizing of these structures for future maintenance program upgrading. Specialized inspection reports were developed for these structures, comprised of an inspection summary, digital photographs, completed field inspection forms (Microsoft Access database), structure inventory and appraisal data, sufficiency rating calculations, and maintenance recommendations. The overall results of this project will culminate in a manageable structure assessment plan.
Cable-Supported Overhead Pipeline Crossings: Structure Assessment Plan
Pipeline crossings occur where an underground pipeline crosses over a waterway or other geologic depression instead of boring below the water or valley. One means of bridging the gap is by using cable-supported structures to carry the overhead pipeline from one side to the other. These structures typically are comprised of two tower frames, supported by concrete foundations, from which two main catenary cables are hung across the span with backstay cables anchored into the ground. Suspender cables hang vertically from the main cables, terminating at pipe hangers that directly support the pipeline. After many years of constant use, with only minor maintenance, these structures should be inspected to assess their current condition and determine their remaining useful life expectancy. Without this information, a potentially catastrophic scenario may unfold involving the full or partial collapse of the supporting structure and the potential for a breach in the pipeline. This paper illustrates the field inspection of cable-supported overhead pipeline crossings and the prioritizing of these structures for future maintenance program upgrading. Specialized inspection reports were developed for these structures, comprised of an inspection summary, digital photographs, completed field inspection forms (Microsoft Access database), structure inventory and appraisal data, sufficiency rating calculations, and maintenance recommendations. The overall results of this project will culminate in a manageable structure assessment plan.
Cable-Supported Overhead Pipeline Crossings: Structure Assessment Plan
Leshko, Brian J. (author)
Pipeline Division Specialty Congress 2004 ; 2004 ; San Diego, California, United States
2004-07-30
Conference paper
Electronic Resource
English
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