Results 251 to 260 of about 93,670 (295)

Reliability analysis of tunnel roof in layered Hoek-Brown rock masses

Computers and Geotechnics, 2018
Abstract This paper develops a two-layer model and upper bound solutions for the shape of collapse block in rectangular tunnel subjected to seepage pressure, and then the reliability-based analysis is performed. According to the layered Hoek-Brown rock masses with different characteristics, a continuous failure mechanism of roof collapse in the deep ...
X.L. Yang, T. Zhou, W.T. Li
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Groundwater Behaviour in Layered Slope Rock Mass And Finite Element Simulation

Acta Geologica Sinica - English Edition, 1988
Abstract The paper deals with the relatively weak permeable layer in a layered structure of a slope rock mass and its effect on groundwater behaviour in the rock mass. When the whole groundwater table is declined in such type of slope rock mass, the permeability of the relatively weak permeable layer in the middle will be several times lower than that ...
Wan Li, Tian Kaiming, Chen Mingyou
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Equivalent elastic moduli of a rock mass consisting of orthorhombic layers

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1982
Abstract A stratified rock mass is considered to consist of a series of parallel layers each of which has orthorhombic elastic properties. When the thicknesses and properties of the layers vary with depth in either a random or systematic repeated fashion it is shown that the layered rock mass can be represented by an ‘equivalent’ homogeneous ...
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ACOUSTIC VELOCITY IN LAYERED ROCK MASSES WITH PERIODIC FRACTURES

2013
Fractures and layering in rock masses have a large impact on both the mechanical and hydraulic properties of the rock mass. When considering seismic elastic waves, fractures can also trap and guide waves and the behavior of such waves may prove useful for probing the geometrical and mechanical properties of the fractures. In the long- wavelength limit,
BACIGALUPO, ANDREA, GAMBAROTTA, LUIGI
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Recognition of creep model of layer composite rock mass and its application

Journal of Central South University of Technology, 2007
The layer composite rock mass is composed of soft rock and hard rock. The difference of their mechanical characteristics is obvious. So it is difficult to describe comprehensively the complicated property with the existent constitutive model. Based on the creep properties of soft rock and hard rock in the composite rock mass and the creep experiment ...
Wen-quan Li, Xiang-dong Li, Bing Han, Yong Shu   +3 more
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STRESSES AROUND A TUNNEL PASSING THROUGH A LAYERED ROCK MASS

ABSTRACT: The article addresses the issue of determining the stresses around a tunnel with a circular cross-section. It passes through several rock layers. The boundary planes between the layers are arbitrarily inclined relative to the tunnel axis. Furthermore, the planes are parallel to the horizontal axis of the tunnel crosssection.The specified ...
Trifonova-Genova, Violeta, Tonkova, Gergana   +1 more
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Vertical performance of rock-socketed pile group in layered saturated rock-soil mass

Computers and Geotechnics, 2023
Yuan Feng Chen, Zhi Yong Ai, Zhan Guo Ma, Zi Kun Ye   +3 more
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Dispersive waves in layered rock masses with periodic jointed structure

2011
A procedure for second-order computational homogenization of layered rock masses is derived in order to describe the effect of the material heterogeneities and to include scale effects on the shear wave propagation. The homogenization procedure is based on an appropriate representation of the micro-displacement field in the unit cell which is assumed ...
BACIGALUPO, ANDREA, GAMBAROTTA, LUIGI
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Bearing capacity of foundation on rock mass with weak layer

1995
This paper deals with a strip surface footing on a rock mass with a weak layer. The calculations of the bearing capacity were performed simultaneously by two computer programs using the finite element method and the finite difference method with independent development of the models.
Miščević, Predrag, Jašarević, Ibrahim   +1 more
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STRESSES AROUND A CIRCULAR OPENING EXCAVATED IN LAYERED AND SLIDING ROCK MASS

2022
В статията се разглежда въпросът за определяне на напреженията в стръмно напластен масив около кръгова изработка. Масивът се състои от хомогенни изотропни пласта. Границата между тях е стръмно наклонена спрямо хоризонта. Влиянието на напреженията, дължащи се на прокарването на изработката се простира в квадратна област.
Trifonova-Genova, Violeta, Tonkova, Gergana   +1 more
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