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Loads of Underground Structures
2019The loads on underground structures are complex and the determination method is not perfect enough, which should be studied further. The load action mechanism of underground structures is different from that of the structures on the ground or in the air. Underground structures are buried underground and their loads come from the stratum itself.
Zhen-Dong Cui +4 more
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Undrained seismic response of underground structures
2020Underground structures must be able to support static overburden loads, as well as to accommodate additional deformations imposed by seismic motions. It seems well established that the most critical demand to the structure is caused by shear waves traveling perpendicular to the tunnel axis, which cause distortions of the cross section (ovaling for a ...
Eimar Andrés Sandoval, Antonio Bobet
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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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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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1991
A number of structural analysis and CAD system have been developed for structural design, but engineers only apply general purpose structure analysis program to analyze underground structure,which are inconvenient in using. The differences between underground structure and above ground structure are as follows:
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A number of structural analysis and CAD system have been developed for structural design, but engineers only apply general purpose structure analysis program to analyze underground structure,which are inconvenient in using. The differences between underground structure and above ground structure are as follows:
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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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Design of Attached Underground Structures
2019As shown in Fig. 8.1, the attached underground structure refers to the basement built under a sturdy building according to certain protection requirements, which is also called air defense basement or accessorily built air raid basement. It corresponds to the independently built underground civil air defense work (single building type).
Zhen-Dong Cui +4 more
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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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