Numerical simulation of train-induced vibrations in rock masses

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Eitzenberger, AndreasLuleå tekniska universitet,Geoteknologi (author)

Numerical simulation of train-induced vibrations in rock masses

Article/chapterEnglish2012

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Leiden :CRC Press/Balkema,2012
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LIBRIS-ID:oai:DiVA.org:ltu-37592
https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-37592URI

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Language:English
Summary in:English

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Subject category:kon swepub-publicationtype

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Godkänd; 2012; 20120229 (andbra)
The vibrations generated by a moving train in a tunnel will radiate into the surrounding ground which, in densely populated areas, will reach nearby buildings and its residents. Analyses are commonly made where the aim is to estimate the ground-borne noise and vibrations levels that may occur in nearby buildings. A common assumption is to treat the rock mass as an isotropic, homogeneous, and linear elastic material. Thus, the influence of discontinuities on the propagation of waves is not considered in the analyses. Within this study, numerical simulations were performed to study the propagation of low-frequency waves through a rock mass near a tunnel. A single period sinusoidal wave was applied as dynamic source on the floor of the tunnel. Observation points were located on the ground surface and around the tunnel. The influence on wave propagation from overburden, position of a discontinuity in relation to the tunnel, and normal and shear stiffness of the discontinuity, was studied by using the Universal Distinct Element Code (UDEC). The results show that increasing overburden reduces the vibration levels on the ground surface. Furthermore, the influence of the normal and shear stiffness of discontinuities depends on where the horizontal discontinuity is positioned in relation to the tunnel. If the horizontal discontinuity is positioned above the dynamic source (e.g. above tunnel or in the tunnel wall) the vibration levels on the ground surface will be reduced but if the horizontal discontinuity is located below the dynamic source (e.g. below the tunnel) the vibration levels on the ground surface will be enhanced. In our analyses, discontinuities only have an impact on the wave propagation if the normal and shear stiffness of is ≤10 GPa/m.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Geoteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Geotechnical Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Annan samhällsbyggnadsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Other Civil Engineering hsv//eng
Dynamics
Numerical modelling
Rock joints
Geoteknik
Soil Mechanics
Mining and Rock Engineering
Gruv- och berganläggningsteknik

Added entries (persons, corporate bodies, meetings, titles ...)

Zhang, PingLuleå tekniska universitet,Geoteknologi(Swepub:ltu)pinzha (author)
Nordlund, ErlingLuleå tekniska universitet,Geoteknologi(Swepub:ltu)erlnor (author)
Luleå tekniska universitetGeoteknologi (creator_code:org_t)

Related titles

In:Harmonising rock engineering and the environmentLeiden : CRC Press/Balkema, s. 1189-11949780415804448

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ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Civil Engineerin ...; and Geotechnical Eng ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Civil Engineerin ...; and Other Civil Engi ...

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