In order to study the leakage of buried natural gas pipeline caused serious environmental pollution and human casualties, acoustic propagation characteristics monitored by distributed optical fiber were studied. At present, research on mainly focuses sound waves along pipe wall, while in soil is still lacking. The attenuation wave size hole pressure studied, evolution process revealed. conclusi...

Based on the establishment of concrete pile test-bed, selection materials and insulation outside are compared, better obtained. The heat exchanger is embedded in advance, stored by using source. By measuring temperature other parameters different depths pile, thermal storage effect analyzed optimal model established. In this paper, through study relevant data about underground soil pump, physic...

Abstract Based on the principle of electromagnetic eddy current testing, aiming at problems heavy workload and difficult location defects in periodic inspection buried pipelines, distribution probes, is modeled simulated by using ANSYS EM simulation software, correlation model between pipeline parameters, excitation signals, received signals established, quantitative relationship wall thickness...