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underground tunnels

underground tunnels

underground tunnels

(OP)
is there a good book about tunnel engineering  for underground power cables ?
thanx

RE: underground tunnels

Suggestion: Visit
http://www.southwire.com/tech/pubs/tdu/97/tdu0797.htm
for: "Keep up with conductors at ICC"
and
  Underground Power Cables
by S. Y. King, N. A. Halfter
  Underground power cables : some aspects of their thermal environment by S. Y. King  

RE: underground tunnels

Are you looking for info on the design of the tunnel itself or  use of power cables within a tunnel? What size tunnel are you considering?

RE: underground tunnels

(OP)
I'm looking for the information on the tunnel including needed facilities and the techniques for cabling in the tunnel .dimensins are apprximately 2 by 2.5 meter.

RE: underground tunnels


Have you considered posting in the civil engineering forum?
  

RE: underground tunnels

I don't know of any book that deal with this specifically. I would think the main concerns would be temperature, possible corrosive or wet environment, type of cable jacket, and means for supporting the cables.

temperature: you need to know what it is. Utility tunnels with steam pipes can be very hot, which may require derating the cable ampacity.

corrosion: personal experience tells me to stay away from exposed aluminum as it will corrode rapidly in a moist environment. I've seen aluminum cable tray in utility tunnels fall apart within 10 years. Use hot-dipped galvanized steel, stainless or non-metallic materials.

jacket: must be impervious to moisture. Don't use unjacketed C.N. cable or unjacketed CLX.

support: cable tray?

Does this help?

RE: underground tunnels

(OP)
ofcourse this helps but I need a little more detailed information and some photos and techniques for cabling too.

RE: underground tunnels

Here are some photos of typical looking utiltiy tunnels-
http://images.google.com/imgres?imgurl=www.underground-ny.com/ny_steam.jpg&imgrefurl=http://www.underground-ny.com/gny_steam.htm&h=478&w=360&prev=/images%3Fq%3Dsteam%2Btunnel%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26sa%3DG
http://images.google.com/imgres?imgurl=www.ets.uidaho.edu/energy/images/Steam_Tunnel.jpg&imgrefurl=http://www.ets.uidaho.edu/energy/Tunnels.htm&h=768&w=1024&prev=/images%3Fq%3Dsteam%2Btunnel%26start%3D20%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26sa%3DN
http://images.google.com/imgres?imgurl=www.infiltration.org/images/ten-tunnel.jpg&imgrefurl=http://www.infiltration.org/tentanda.htm&h=300&w=205&prev=/images%3Fq%3Dsteam%2Btunnel%26start%3D20%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26sa%3DN
http://images.google.com/imgres?imgurl=www.drwren.com/photo_album/Geneve96/002.jpg&imgrefurl=http://www.drwren.com/photo_album/Geneve96/002.htm&h=426&w=563&prev=/images%3Fq%3Dsteam%2Btunnel%26start%3D20%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26sa%3DN
http://www.actionsquad.org/Labyrinth/tcrt02.htm
http://pplant.sdstate.edu/steam.htm

Some general technical info on medium voltage cable application-
http://www.okonite.com/engineering/index.html

See this link for temperature derating factors from one cable manufacturer. Consult your manufacturer for exact numbers-
http://www.okonite.com/engineering/ampacity-correction-factors.html

For cable tray and other support systems-
http://www.b-line.com/product/index.asp
http://www.b-line.com/product/PDFLibrary/CableTray/Metallic/index.htm

Some articles found at IEEE-
Gregory, B., Choices and considerations for the selection of power cables in tunnel installations. Cables in Tunnels (Ref. No. 2000/070), IEE Seminar , 2000 Page(s): 8/1 -8/9

Schroth, R.G.; Obst, D., Long distance tunnels for the installation of 400 kV XLPE cables. Cables in Tunnels (Ref. No. 2000/070), IEE Seminar , 2000 Page(s): 4/1 -4/4

Mendez, J.M., Sr.; Monteys, J., Design of power and communication cable installations to minimise interference in tunnels. Cables in Tunnels (Ref. No. 2000/070), IEE Seminar , 2000 Page(s): 6/1 -6/6

Anders, G.J., Rating of cables on riser poles, in trays, in tunnels and shafts-a review. Power Delivery, IEEE Transactions on, Volume: 11 Issue: 1 , Jan 1996 Page(s): 3 -11

Ohata, K.; Sakurai, S.; Ichiyanagi, N.; Shibata, K.; Inoue, T., Transient temperature rise of tunnel for power cables
Power Delivery, IEEE Transactions on , Volume: 5 Issue: 2, Apr 1990 Page(s): 745 -752

RE: underground tunnels

(OP)
thank you alehman.
I appreciate your help.

RE: underground tunnels

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