Concept

Fracture (geology)

Related publications (143)

Mechanical-hydraulic interaction in the lining cracking process of pressure tunnels

Pressure tunnels are in operation subjected to internal water pressure. When the hoop tensile stress acting at the lining intrados exceeds the tensile strength of concrete, longitudinal cracks occur in the concrete lining. As a consequence of crack opening ...

2013

Desiccation shrinkage of non-clayey soils: a numerical study

Lyesse Laloui, Hervé Péron

A meso-scale model based on the evolution of the pore system and idealized as bimodal is numerically examined. A simplified evolution of the model reveals a series of characteristics that qualitatively agree with the observed macroscopic experimental findi ...

Wiley-Blackwell2013

Rock mass assessment and corresponding TBM operation optimization for TBM tunneling at depth - a case study of Jinping II hydropower station

Jian Zhao, Lijun Yin

During TBM tunneling at the great depth, problems such as high in situ stress, groundwater inflow and fractured rock masses are main reasons of the geotechnical risk occurrence in TBM tunneling. Thus it is necessary to modify TBM and optimize TBM operation ...

Crc Press-Taylor & Francis Group2013

Multi-Scale Approach to Cracking Criteria for Drying Silty Soils

Lyesse Laloui, Mohammad Monfared

Cracking is a most unwanted development in soil structures undergoing periodic drying. Desiccation cracking arises in the apparent absence of external forces. Hence, either an internal, self equilibrated stress pattern resulting from kinematic incompatibil ...

American Society of Civil Engineers2013

Study of wave attenuation across parallel fractures using propagator matrix method

Jian Zhao, Jianbo Zhu

Stress wave attenuation across fractured rock masses is a great concern of underground structure safety. This paper presents an analytical study on wave attenuation across parallel fractures at arbitrary incidence angles, where multiple reflections occurri ...

Wiley-Blackwell2012

Laboratory and in Situ Simulation Tests of the Fracturing in the EDZ around Galleries in Opalinus Clay

Vincent Labiouse

Within the framework of the TIMODAZ project laboratory and in-situ experiments have been performed to study the failure processes around tunnels in laminated clay rich sedimentary rocks at reduced scale. The fracture patterns observed in the hollow cylinde ...

European Commission2012

Micromechanical Study of Rock Fracture and Fragmentation under Dynamic Loads using Discrete Element Method

Tohid Kazerani

The study presented in this thesis aims to numerically explore the micro-mechanisms underlying rock fracture and fragmentation under dynamic loading. The approach adopted is based on the Discrete Element Method (DEM) coupled to the Cohesive Process Zone (C ...

EPFL2011

Theory and laboratory experiments of elastic wave scattering by dry planar fractures

Thomas Emmanuel Blum

Remote sensing of fractures with elastic waves is important in fields ranging from seismology to nondestructive testing. In many geophysical applications, fractures control the flow of fluids such as water, hydrocarbons or magma. While previous analytic de ...

American Geophysical Union2011

Mechanics of Growth and Coalescence of Pre-existing Voids in a Ductile Matrix

Tomasz Jodlowski

This research project experimentally and numerically investigates the growth and coalescence of pre-existing voids for a wide range of stress states in a ductile matrix with a special focus on shear dominated loading conditions and presents quantitative ki ...

EPFL2011

Hydraulic fracturing

Brice Tanguy Alphonse Lecampion

Method and apparatus for estimating a fluid driven fracture volume during hydraulic fracturing treatment of a ground formation. A series of tiltmeters are positioned at spaced apart tiltmeter stations at which tilt changes due to the hydraulic fracturing t ...

Commonwealth Scientific and Industrial Research Organisation2010

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