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Compressive sensing of underground structures using GPR
Digital Signal Processing, 2012Feature detection in sensing problems usually involves two processing stages. First, the raw data collected by a sensor, such as a Ground Penetrating Radar (GPR), is inverted to form an image of the subsurface area. Second, the image is searched for features like lines using an algorithm such as the Hough Transform (HT), which converts the problem of ...
Ali Cafer Gürbüz +2 more
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REPAIR OF UNDERGROUND STRUCTURES
Zbornik radova Trinaestog Međunarodnog naučno-stručnog savetovanja Ocena stanja, održavanje i sanacija građevinskih objekataUnderground structures are often exposed to soil and water pressures, various aggressive chemicals, temperature variations, and the impact and vibrations of the equipment used. These often result in chemical attack on concrete, corrosion of steel reinforcing and loss of load-carrying capacity of the steel framing.
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Aseismic design of underground structures
Tunnelling and Underground Space Technology, 1987Abstract This study defines the basis for the aseismic design of subsurface excavations and underground structures. It includes a definition of the seismic environment and earthquake hazard, and a review of the analytical and empirical tools that are available to the designer concerned with the performance of underground structures subjected to ...
C.M. St John, T.F. Zahrah
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Dynamic Similitude of Underground Structures
Journal of the Engineering Mechanics Division, 1964Similitude requirements for predicting the response of dynamically loaded buried structures by means of scale models were developed by dimensional analysis and were checked experimentally. Hollow circular and square aluminum tubes were buried in dry compacted Ottawa sand and loaded dynamically by dropping a cylindrical weight on the soil surface.
Donald F. Young, Glenn Murphy
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Plastic Pipe for Underground Structures
Corrosion, 1955Tabulated data are given on the physical properties of pipe made from the epoxy-glass, polyester-glass, cellulose acetate butyrate, polyethylene, styrene-rubber, polyvinyl chloride, Type I and polyvinyl chloride, Type II as to specific gravity, tensile strength, flexural strength, thermal expansion, impact and maximum useful temperature together with ...
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Underground Structures and Gravity Gradiometry
2002Abstract : This report evaluates the use of gravity gradiometry as a tool to characterize underground facilities. The gradient of the Earth's gravitational field can be used to make inferences about the Earth's mass density field. Mass deficits, such as those produced when an underground region is excavated, produce a characteristic change in the Earth'
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