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    Diversion Tunnel Design Assumptions

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    Civil Engineer
    The document contains load and stiffness data for three sections of a tunnel project. It provides key information like groundwater levels, internal water levels, tunnel fill conditions, net hydrostatic heads, drainage effectiveness, and spring stiffnesses calculated with two different methods. It also includes rock load calculations using a standard methodology, providing equivalent rock depth, vertical pressure, side pressure, and design loads for each tunnel section.

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    © All Rights Reserved
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    Diversion Tunnel Design Assumptions

    Uploaded by

    Civil Engineer
    30 views2 pages
    The document contains load and stiffness data for three sections of a tunnel project. It provides key information like groundwater levels, internal water levels, tunnel fill conditions, net hydrostatic heads, drainage effectiveness, and spring stiffnesses calculated with two different methods. It also includes rock load calculations using a standard methodology, providing equivalent rock depth, vertical pressure, side pressure, and design loads for each tunnel section.

    Original Description:

    Tunnel design assumptions

    Original Title

    DIVERSION TUNNEL DESIGN ASSUMPTIONS

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    © © All Rights Reserved

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    The document contains load and stiffness data for three sections of a tunnel project. It provides key information like groundwater levels, internal water levels, tunnel fill conditions, net hydrostatic heads, drainage effectiveness, and spring stiffnesses calculated with two different methods. It also includes rock load calculations using a standard methodology, providing equivalent rock depth, vertical pressure, side pressure, and design loads for each tunnel section.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    30 views2 pages

    Diversion Tunnel Design Assumptions

    Uploaded by

    Civil Engineer
    The document contains load and stiffness data for three sections of a tunnel project. It provides key information like groundwater levels, internal water levels, tunnel fill conditions, net hydrostatic heads, drainage effectiveness, and spring stiffnesses calculated with two different methods. It also includes rock load calculations using a standard methodology, providing equivalent rock depth, vertical pressure, side pressure, and design loads for each tunnel section.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 2

    DT1-LOADS

    U/S TRANSITION U/S PLUG


    Characteristic Levels & Loads Units
    LC1-1 LC1-2 LC1-3 LC1-4 LC2-1 LC2-2 LC2-3 LC2-4
    External Grownd Water Level = masl 1080.00 1160.00 1060.00 1160.00 1080.00 1160.00 1060.00 1160.00
    Internal Water Level = masl 967.70 1060.00 1160.00 967.70 967.70 1060.00 1160.00 967.70
    Tunnel (Empty = E, Full = F) E F F E E F F E
    Net Head = mWC 112.30 100.00 -100.00 192.30 112.30 100.00 -100.00 192.30
    Drainage Curtain Effectiveness = % 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
    Lining Drainage Effectiveness = % 50.00 50.00 50.00 50.00 75.00 75.00 75.00 75.00
    Design Hydrostatic Head (Ext)= mWC 56.15 50.00 96.15 28.08 25.00 48.08
    Design Hydrostatic Head (Int)= mWC -50.00 -25.00

    D/S PLUG
    Characteristic Levels & Loads Units
    LC3-1 LC3-2 LC3-3 LC3-4
    External Grownd Water Level = masl 1160.00 1160.00 972.20 1160.00
    Internal Water Level = masl 972.20 965.70 965.70 965.70
    Tunnel (Empty = E, Full = F) F E E E
    Net Head = mWC 187.80 194.30 6.50 194.30
    Drainage Curtain Effectiveness = % 34.00 34.00 0.00 0.00
    Lining Drainage Effectiveness = % 75.00 75.00 75.00 75.00
    Design Hydrostatic Head (Ext)= mWC 30.99 32.06 1.63 48.58
    Design Hydrostatic Head (Int)= mWC

    DT2-LOADS
    U/S TRANSITION U/S PLUG
    Characteristic Levels & Loads Units
    LC1-1 LC1-2 LC1-3 LC1-4 LC2-1 LC2-2 LC2-3 LC2-4
    External Grownd Water Level = masl 1080.00 1160.00 1060.00 1160.00 1080.00 1160.00 1060.00 1160.00
    Reservoir EL / Internal Water* = masl 958.70 1060.00 1160.00 958.70 958.70 1060.00 1160.00 958.70
    Tunnel (Empty = E, Full = F) E F F E E F F E
    Net Head = mWC 121.30 100.00 -100.00 201.30 121.30 100.00 -100.00 201.30
    Drainage Curtain Effectiveness = % 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
    Lining Drainage Effectiveness = % 50.00 50.00 50.00 50.00 75.00 75.00 75.00 75.00
    Design Hydrostatic Head (Ext)= mWC 60.65 50.00 100.65 30.33 25.00 50.33
    Design Hydrostatic Head (Int)= mWC -50.00 -25.00

    D/S PLUG
    Characteristic Levels & Loads Units
    LC3-1 LC3-2 LC3-3 LC3-4
    External Grownd Water Level = masl 1160.00 1160.00 972.20 1160.00
    Reservoir EL / Internal Water* = masl 972.20 955.70 955.70 955.70
    Tunnel (Empty = E, Full = F) F E E E
    Net Head = mWC 187.80 204.30 16.50 204.30
    Drainage Curtain Effectiveness = % 34.00 34.00 0.00 34.00
    Lining Drainage Effectiveness = % 75.00 75.00 75.00 75.00
    Design Hydrostatic Head (Ext)= mWC 30.99 33.71 4.13 33.71
    Design Hydrostatic Head (Int)= mWC
    Spring Stiffnesses are computed in accordance with USACE EM 1110-2-2901 & Goodman Methodology,
    GOODMAN METHOD U/S TRANSITION U/S PLUG D/S PLUG
    Rock Deformation Modulus (GPa) 15 1 15 1 15 1
    Radius of Tunnel (m) 9.7 9.7 9.1 9.1 8.4 8.4
    Poisson's Ratio 0.25 0.25 0.25 0.25 0.25 0.25
    kr GN/m3 1.23711 0.08247 1.31868 0.08791 1.42857 0.09524
    kr kN/m3 1237.11 82.4742 1318.68 87.9121 1428.57 95.2381

    EM 1110-2-2901 METHOD
    Rock Deformation Modulus (GPa) 15 1 15 1 15 1
    Segment Length (m) 1.1 1.1 1.1 1.1 1.1 1.1
    Angle (rad) 0.11221 0.11221 0.11221 0.11221 0.11221 0.11221
    Poisson's Ratio 0.25 0.25 0.25 0.25 0.25 0.25
    kr GN/m 1.48114 0.09874 1.48114 0.09874 1.48114 0.09874
    kr kN/m3 1481.14 98.7424 1481.14 98.7424 1481.14 98.7424

    Note:
    1. Tangential Spring are not considered.
    2. Same springs are considered for Invert, Wall & Crown.

    Rock Loads
    EM 1110-2-2901
    Height of Tunnel = (m) 19.4 18.2 17.5
    Unit Weight of Rock = (kN/m3) 32.3 32.3 32.3
    Equivalent Rock Depth Factor = 0.3 0.3 0.3
    (Pt-1) Equivalent Rock Depth = (m) 5.82 5.46 5.25
    (Pt-1) Vertical Pressure = kPa 187.986 176.358 169.575
    (Pt-4) Side Pressure = kPa 93.993 88.179 84.7875
    (Pt-4) Increase for D&BM = kPa 122.191 114.633 110.224
    Circular Tunnel ? No No No
    (Pt-4) Increased Vertical Load = kPa 281.979 264.537 254.363
    Design Vertical Load = kPa 281.979 264.537 254.363
    Design Horizontal Load = kPa 122.191 114.633 110.224

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