Ing3 an der RWTH Aachen | Karteikarten & Zusammenfassungen

Lernmaterialien für Ing3 an der RWTH Aachen

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TESTE DEIN WISSEN
how to measure primary stress of a tunnel?
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TESTE DEIN WISSEN
Stress measurements in tunnels are usually made in boreholes drilled beyond 'two tunnel diameters'.
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TESTE DEIN WISSEN
why radial stress and shear stress at wall is 0?
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TESTE DEIN WISSEN
The radial and shear stress are zero because the tunnel is filled with air which applies no shear or radial loading to the surface (except for atmospheric pressure).
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TESTE DEIN WISSEN
how to increase the shear strength?
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TESTE DEIN WISSEN
Considerable increases in shear strength accompany shearing with restricted dilatancy explain why limiting dilation on discontinuities by rock bolting can stabilize excavations in discontinuous rock.
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TESTE DEIN WISSEN
Borehole breakout: difference in fracture mechanism, for limestone? for granite?
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TESTE DEIN WISSEN
the limestone fails through the development of a shear fracture, whereas the granite fails through the development of tensile splitting.
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TESTE DEIN WISSEN
Stress Relief Methods: what is the difference between overcoring and borehole-slotting?
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TESTE DEIN WISSEN
In overcoring, the strains are measured that occur when the stresses acting on a volume of rock are relieved completely in all directions. In the borehole-slotting method, stress within the rock is only partly relaxedby the cut/bore.
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TESTE DEIN WISSEN
what kinds of HPP do you know?
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TESTE DEIN WISSEN
conventional; pumped-storage; run-of-river tide
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TESTE DEIN WISSEN
how to measure P+S stress of a tunnel?
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TESTE DEIN WISSEN
the 'Flat jack' method perform measurements at the tunnel wall and thus measure the primary+secondarystresses. PS, these methods are rarely used today for primary stress measurement.
Lösung ausblenden
TESTE DEIN WISSEN
which stress does Flat-Jack Method measures?
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TESTE DEIN WISSEN
the sum of the primary and secondary stresses.
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TESTE DEIN WISSEN
what is the 'discontinuity' of rock?
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TESTE DEIN WISSEN
The word ‘discontinuity’ denotes any separation in the rock continuum having effectively zero tensile strength and is used without any generic connotation (e.g. joints and faults are types of discontinuities formed in different ways).
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TESTE DEIN WISSEN
what is discontinuity spacing?
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TESTE DEIN WISSEN
Spacingis the distance between adjacent discontinuity intersections with the measuring scanline
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TESTE DEIN WISSEN
dam type
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TESTE DEIN WISSEN
Gravity Arch Buttress Embankment
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TESTE DEIN WISSEN
Which kinds of grouting types do you know?
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TESTE DEIN WISSEN
Injektionslanzen, Manschettenrohre, Vibra-Ventil Tube-a-manchette grouting Jet-grouting Packer Compaction Grouting Compensation Grouting
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Q:
how to measure primary stress of a tunnel?
A:
Stress measurements in tunnels are usually made in boreholes drilled beyond 'two tunnel diameters'.
Q:
why radial stress and shear stress at wall is 0?
A:
The radial and shear stress are zero because the tunnel is filled with air which applies no shear or radial loading to the surface (except for atmospheric pressure).
Q:
how to increase the shear strength?
A:
Considerable increases in shear strength accompany shearing with restricted dilatancy explain why limiting dilation on discontinuities by rock bolting can stabilize excavations in discontinuous rock.
Q:
Borehole breakout: difference in fracture mechanism, for limestone? for granite?
A:
the limestone fails through the development of a shear fracture, whereas the granite fails through the development of tensile splitting.
Q:
Stress Relief Methods: what is the difference between overcoring and borehole-slotting?
A:
In overcoring, the strains are measured that occur when the stresses acting on a volume of rock are relieved completely in all directions. In the borehole-slotting method, stress within the rock is only partly relaxedby the cut/bore.
Q:
what kinds of HPP do you know?
A:
conventional; pumped-storage; run-of-river tide
Q:
how to measure P+S stress of a tunnel?
A:
the 'Flat jack' method perform measurements at the tunnel wall and thus measure the primary+secondarystresses. PS, these methods are rarely used today for primary stress measurement.
Q:
which stress does Flat-Jack Method measures?
A:
the sum of the primary and secondary stresses.
Q:
what is the 'discontinuity' of rock?
A:
The word ‘discontinuity’ denotes any separation in the rock continuum having effectively zero tensile strength and is used without any generic connotation (e.g. joints and faults are types of discontinuities formed in different ways).
Q:
what is discontinuity spacing?
A:
Spacingis the distance between adjacent discontinuity intersections with the measuring scanline
Q:
dam type
A:
Gravity Arch Buttress Embankment
Q:
Which kinds of grouting types do you know?
A:
Injektionslanzen, Manschettenrohre, Vibra-Ventil Tube-a-manchette grouting Jet-grouting Packer Compaction Grouting Compensation Grouting

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Das sind die beliebtesten StudySmarter Kurse für deinen Studiengang Ing3 an der RWTH Aachen

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Hochschule Fresenius

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Universidad San Martin de Porres