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Prestressed Concrete-Lined Pressure Tunnels
Af: T.D.Y.F. Simanjuntak Engelsk Paperback
SPAR
kr 95
Prestressed Concrete-Lined Pressure Tunnels
Af: T.D.Y.F. Simanjuntak Engelsk Paperback

Hydropower can be a source of sustainable energy, provided environmental considerations are taken into account and economic aspects of hydropower design are appropriately addressed. Using concrete-lined pressure tunnels instead of steel pipes may be economically attractive but may also have limitations due to the low tensile strength of concrete.

Cracking in concrete tunnel linings can lead to loss of energy production, extensive repairs, and even accidents. One of the techniques available to improve the bearing capacity of pressure tunnels is through prestressing the concrete lining by grouting the circumferential gap between the concrete lining and the rock mass at high pressure. A classical approach to determine the bearing capacity of such tunnels is based on the theory of elasticity, assuming impervious concrete. In this research, a new concept is introduced to assess the effect of seepage on the bearing capacity of pressure tunnels. Also, an innovative approach is proposed to explore the effects of the in-situ stress ratio on the lining performance. Distinction is made based on whether the rock mass behaves as an elasto-plastic isotropic, or elastic anisotropic material. Furthermore, a simplified method is introduced to quantify seepage associated with cracks around the tunnel, which is useful for assessing tunnel stability.

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Hydropower can be a source of sustainable energy, provided environmental considerations are taken into account and economic aspects of hydropower design are appropriately addressed. Using concrete-lined pressure tunnels instead of steel pipes may be economically attractive but may also have limitations due to the low tensile strength of concrete.

Cracking in concrete tunnel linings can lead to loss of energy production, extensive repairs, and even accidents. One of the techniques available to improve the bearing capacity of pressure tunnels is through prestressing the concrete lining by grouting the circumferential gap between the concrete lining and the rock mass at high pressure. A classical approach to determine the bearing capacity of such tunnels is based on the theory of elasticity, assuming impervious concrete. In this research, a new concept is introduced to assess the effect of seepage on the bearing capacity of pressure tunnels. Also, an innovative approach is proposed to explore the effects of the in-situ stress ratio on the lining performance. Distinction is made based on whether the rock mass behaves as an elasto-plastic isotropic, or elastic anisotropic material. Furthermore, a simplified method is introduced to quantify seepage associated with cracks around the tunnel, which is useful for assessing tunnel stability.

Produktdetaljer
Sprog: Engelsk
Sider: 148
ISBN-13: 9781138028531
Indbinding: Paperback
Udgave:
ISBN-10: 1138028533
Udg. Dato: 28 jul 2015
Længde: 0mm
Bredde: 240mm
Højde: 170mm
Oplagsdato: 28 jul 2015
Forfatter(e): T.D.Y.F. Simanjuntak
Forfatter(e) T.D.Y.F. Simanjuntak


Kategori Konstruktionsteknik


Sprog Engelsk


Indbinding Paperback


Sider 148


Udgave


Længde 0mm


Bredde 240mm


Højde 170mm


Udg. Dato 28 jul 2015


Oplagsdato 28 jul 2015

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