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A platform for research: civil engineering, architecture and urbanism
Research Needs and Recommendations for Testing Thrust Restraint of Buried Pipelines
Thrust restraint design practices have evolved over the years, based on experience, theoretical research, and laboratory/field testing. Such tests have been conducted by different research entities and pipe manufacturers, most often to study and/or provide verification of the restraint design theories and to validate soil parameters. However, due to the wide ranges of pipe material, size, configuration, and soil conditions, there are considerable gaps in the available test data. Such gaps result in large-scale interpolations and extrapolations to fit the data to many common thrust restraint design conditions. In an attempt to fill some of these data gaps, additional field or laboratory tests are conducted from time to time. By their very nature, thrust restraint tests are expensive and time consuming. As tests on large-diameter pipes are more expensive, most of the field tests have been performed on small-diameter pipelines. The results from small-diameter pipelines may not be readily applicable to large-diameter pipelines. While recognizing these limitations, the need for field testing of large-diameter pipelines to study thrust restraint behavior is desirable not only to understand the theory but also to improve design practice. Understanding the mechanisms of soil-pipe interaction is essential to modeling the means by which thrust forces are resisted by the soil. An important parameter in determining the frictional resistance mechanism is the soil normal pressure distribution around the pipe. While understanding of this mechanism has improved, test data verifying the actual pressure distribution are very limited. Recognizing the need for additional testing and the high cost of conducting these tests, the ASCE Task Committee on Thrust Restraint Design of Buried Pipelines (Task Committee) has undertaken the task of reviewing available data, identifying the data gaps and research needs, and recommending the types of research and tests to help maximize the useful data gained from these tests. Some recommendations for test configurations will also be included to encourage consistency in testing methods. It is the intent of the Task Committee that this paper function as an invitation to others in the pipeline industry to partner with us to continue the development and improvement of a more unified thrust restraint design practice.
Research Needs and Recommendations for Testing Thrust Restraint of Buried Pipelines
Thrust restraint design practices have evolved over the years, based on experience, theoretical research, and laboratory/field testing. Such tests have been conducted by different research entities and pipe manufacturers, most often to study and/or provide verification of the restraint design theories and to validate soil parameters. However, due to the wide ranges of pipe material, size, configuration, and soil conditions, there are considerable gaps in the available test data. Such gaps result in large-scale interpolations and extrapolations to fit the data to many common thrust restraint design conditions. In an attempt to fill some of these data gaps, additional field or laboratory tests are conducted from time to time. By their very nature, thrust restraint tests are expensive and time consuming. As tests on large-diameter pipes are more expensive, most of the field tests have been performed on small-diameter pipelines. The results from small-diameter pipelines may not be readily applicable to large-diameter pipelines. While recognizing these limitations, the need for field testing of large-diameter pipelines to study thrust restraint behavior is desirable not only to understand the theory but also to improve design practice. Understanding the mechanisms of soil-pipe interaction is essential to modeling the means by which thrust forces are resisted by the soil. An important parameter in determining the frictional resistance mechanism is the soil normal pressure distribution around the pipe. While understanding of this mechanism has improved, test data verifying the actual pressure distribution are very limited. Recognizing the need for additional testing and the high cost of conducting these tests, the ASCE Task Committee on Thrust Restraint Design of Buried Pipelines (Task Committee) has undertaken the task of reviewing available data, identifying the data gaps and research needs, and recommending the types of research and tests to help maximize the useful data gained from these tests. Some recommendations for test configurations will also be included to encourage consistency in testing methods. It is the intent of the Task Committee that this paper function as an invitation to others in the pipeline industry to partner with us to continue the development and improvement of a more unified thrust restraint design practice.
Research Needs and Recommendations for Testing Thrust Restraint of Buried Pipelines
Pipelines 2014 ; 2014 ; Portland, Oregon
Pipelines 2014 ; 1805-1815
2014-07-30
Conference paper
Electronic Resource
English
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