Seismic-induced pore pressure and effective stresses in the saturated porous seabed under seismic loading are the main factors that govern the overall stability of submarine pipelines. In most of the previous investigations for the seismic-induced dynamic response around a submarine pipeline have been limited to two-dimension cases. In this paper, a three-dimensional finite element model includ...

Research at home and abroad shows that subway excavation often causes soil stress loss, resulting in settlement deformation horizontal displacement of stratum. Therefore, combined with the special engineering geological conditions Kunming area, foundation caused by is studied, so as to provide an important for proposing protection measures surrounding buildings buried pipelines promoting constr...

This paper provides an explanation of the general principles of operation of the Intelligent Distributed Acoustic Sensing technology and focuses on the current areas of interest and applications of this technology within the industry. Currently the technology is mainly used for perimeter monitoring of utility assets and third party intervention monitoring on buried pipelines. In the oil & gas s...

The work presents an analysis of the dynamical response of a buried pipe under seismic excitation. The pipe is assumed to be of finite length and theWinkler model to schematize soil-structure interaction is considered. With reference to the boundary conditions of end-constrained pipe the axial motions are discussed. Careful numerical integrations are performed in order to prevent undesirable os...

The design and construction of shallow-buried tunnels in densely populated urban areas involve many challenges. The ground movements induced by tunneling effects pose potential risks to infrastructure such as surface buildings, pipelines, and roads. In this paper, a case study of the Zhongjie subway station located in Shenyang, China, is examined to investigate the key construction techniques a...

steel pipelines are susceptible to corrosion by the action of corrosive substance in the environment and one of the most common failure modes in buried pipeline coatingis cathodic disbondment. consequently, electrochemical impedance spectroscopy (eis) was used to assess the effect of three important parameters, the thickness of coating, the artificial defect and electrolyte type, on cathodic di...

For the corrosion of iron, copper and carbon steel in 1.0 M HCl HNO3 solution. The materials extracted from berry mango leaves when added different concentrations to solutions 1 molar hydrochloric acid nitric have shown remarkable effective resistance steel, as well samples that we brought oil companies Galo study extent these their use natural products for inhibitors pipelines These products, ...

Leakage detection plays a significant role in water pipeline since leakage problems severely affect urban supply safety. The fibre optic hydrophone derives from hydroacoustic sensing technology and exhibits superior performance to traditional electric hydrophones. To investigate of the proposed system, tests were conducted on overhead buried pipelines, respectively. Two types spherical valves a...

Hydrogen gas has been widely recognized as an environmentally clean and renewable energy fuel, and it provides a way to reduce greenhouse gas and air pollution emission. A great deal of effort has been made to develop new techniques in the field of hydrogen energy, including hydrogen production, storage, and infrastructure. Recently a metallic gasket, which is made of type 316L stainless steel,...