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PRCI PR-15-712
- Pipeline Response to Blasting in Rock
- Report / Survey by Pipeline Research Council International, 09/01/1991
- Publisher: PRCI
$298.00$595.00
L51661e
Southwest Research Institute
Need: Blasting near buried gas pipelines is a common occurrence, and the blast-induced stresses can be significant relative to normal operational stress limits on a pipeline. Use of explosives for trench blasting in construction of pipelines adjacent to older ones, for strip mining, for highway construction, for quarry blasting, for seismic exploration, for utility construction, etc., in the vicinity of in-service pipelines occurs quite frequently. Consequently, pipeline companies need effective engineering procedures to estimate blast-induced stresses for use in developing realistic blasting guidelines and criteria for specific blasting situations near their pipelines. Blasting activities without limitations would certainly not be safe realistically.
Benefit: This research document records and analyzes data from actual pipeline conditions during blasting in rock for highway construction permitting comparison between experimental and actual results. Continuation of earlier work that developed equations and methods for estimating pipeline stresses for a variety of explosive sources detonated simultaneously in close proximity to pipe.
Result: An investigation was conducted to record and analyze pipeline strain data from highway construction blasting in rock. The construction of an interstate highway section and the availability of two pipelines, to be relocated provided an opportunity to obtain pipe strain data not available in previous PRCI blasting research projects conducted with underground blasting in soil. After many delays and obstacles were encountered in performing this study, SwRI was finally able to monitor rock blasting for 21 firings, which provided important pipe strain data from a section of 30-inch pipe and from a 12-inch operational pipeline adjacent to the highway construction project.
Southwest Research Institute
Need: Blasting near buried gas pipelines is a common occurrence, and the blast-induced stresses can be significant relative to normal operational stress limits on a pipeline. Use of explosives for trench blasting in construction of pipelines adjacent to older ones, for strip mining, for highway construction, for quarry blasting, for seismic exploration, for utility construction, etc., in the vicinity of in-service pipelines occurs quite frequently. Consequently, pipeline companies need effective engineering procedures to estimate blast-induced stresses for use in developing realistic blasting guidelines and criteria for specific blasting situations near their pipelines. Blasting activities without limitations would certainly not be safe realistically.
Benefit: This research document records and analyzes data from actual pipeline conditions during blasting in rock for highway construction permitting comparison between experimental and actual results. Continuation of earlier work that developed equations and methods for estimating pipeline stresses for a variety of explosive sources detonated simultaneously in close proximity to pipe.
Result: An investigation was conducted to record and analyze pipeline strain data from highway construction blasting in rock. The construction of an interstate highway section and the availability of two pipelines, to be relocated provided an opportunity to obtain pipe strain data not available in previous PRCI blasting research projects conducted with underground blasting in soil. After many delays and obstacles were encountered in performing this study, SwRI was finally able to monitor rock blasting for 21 firings, which provided important pipe strain data from a section of 30-inch pipe and from a 12-inch operational pipeline adjacent to the highway construction project.
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