wsdot viaduct update

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  • 8/9/2019 WSDOT Viaduct update

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    Today’s 

    genda

    • Expert Review Panel

    • Settlement update, ongoing

    monitoring• SR 99 Tunnel Project

    update

    2

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    EXPERT REVIEW

    Panel  

    3

    2015 report key findings

    • Confident that the project can be successfully

    completed

    • The design-build contract is the right tool to get

    the job done

    • The seawall and tunnel project schedules are not

    adversely effected by the respective projects

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    Expanded

    4

     Jack Main

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    f requency5

    Instrument Type General Location Monitoring Frequency

    Utility SettlementPoint

    Near and south of access pit,including Western Avenue

    Daily or weekly, depending onlocation

    Satellite (ATLAS) Downtown corridor Biweekly

    MPBX Along tunnel alignment Every four hours along full route

    Daily within TBM zone of

    influence

    Inclinometer Access shaft vicinity Weekly

    Seismographs Alaskan Way – Jackson to

    Main, Tunnel portals

    Once per minute, reported

    weekly

    Liquid Levels Western, Polson and

    Commuter buildings

    Every four hours

    Limited Manual

    Building Survey

    Pioneer Square buildings near

    Viaduct (select locations)

    Daily, weekly or monthly,

    depending on location

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    f requency6

    Instrument Type General Location Monitoring Frequency

    Manual Viaduct

    Survey

    Full length of Viaduct Weekly or monthly, depending

    on location

    AMTS Pioneer Square buildings near

    Viaduct, Viaduct (select

    locations)

    Half-hourly or hourly, depending

    on location

    Tiltmeters Western, Polson and

    Commuter buildings, Viaduct

    (select locations)

    Every four hours

    Crack Gauges Viaduct (select locations) Every four hours to every three

    weeks, depending on location

    Piezometers Access shaft, tunnel

    alignment

    Every two minutes to every four

    hours, depending on location

    Secondary Survey

    Control

    SoDo, Pioneer Square,

    Downtown

    Weekly or monthly, depending

    on location

    LiDAR Pioneer Square Monthly

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    Settlement

    7

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    Settlement

    8

    •  All readings shown are based on WSDOT survey data.

    • The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.

    • Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.

    Columbia Street and Second Avenue

    (Primary Surface Survey Control Point –

     X35)

    -0.16 -0.16 -0.16 -0.16

    -1.5

    -1.25

    -1

    -0.75

    -0.5

    -0.25

    0

    0.25

       S   e   t   t    l   e   m   e   n   t    (   i   n .    )

    Survey Accuracy

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    Columbia Street and Second Avenue

    (Secondary Surface Survey Control Point –

     SMP405)

    Settlement

    9

    •  All readings shown are based on STP survey data.

    • The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.

    • Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.

    -0.34

    -0.41

    -0.32

    -0.32

    -0.34

    -0.31

    -0.30

    -0.34

    -0.31

    -0.35

    -0.32

    -0.32

    -0.31

    -0.19

    -0.25 -0.23 -0.32

    -0.29-0.29

    -0.32

    -1.500

    -1.250

    -1.000

    -0.750

    -0.500

    -0.250

    0.000

    0.250

       S   e   t   t    l   e   m   e   n   t    (   i   n .    )

    Survey Accuracy

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    Settlement

    10

    •  All readings shown are based on WSDOT survey data.

    • The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.

    • Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.

    James Street and Fifth Avenue

    (Primary Surface Survey Control Point –

     AWV011)

       S   e   t   t    l   e   m   e   n   t    (   i   n .    )

    -0.16 -0.16

    -1.5

    -1.25

    -1

    -0.75

    -0.5

    -0.25

    0

    0.25

    Survey Accuracy

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    Settlement

    11

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    South Main Street and First Avenue South

    (Primary Surface Survey Control Point –

     X05)

    Settlement

    12

    •  All readings shown are based on WSDOT survey data.

    • The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.

    • Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.

       S   e   t   t    l   e   m   e   n   t    (   i   n .    )

    -0.71

    -0.71

    -0.67

    -0.75

    -0.71

    -0.71

    -0.75-0.83

    -0.94

    -0.94 -0.94 -0.94 -0.98 -0.94 -0.94 -0.94 -0.98 -0.98 -0.94 -0.98 -0.98 -0.98

    -1.500

    -1.250

    -1.000

    -0.750

    -0.500

    -0.250

    0.000

    0.250

    Survey Accuracy

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    South Main Street and First Avenue South

    (Secondary Surface Survey Control Point –

     MAIN)

    Settlement

    13

    •  All readings shown are based on STP survey data.

    • The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.

    • Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.

    -1.04

    -1.08

    -1.15 -1.12

    -1.15

    -1.03

    -1.06

    -1.06

    -1.10

    -1.10

    -1.14

    -1.09

    -1.10

    -1.09 -1.10

    -0.95

    -1.00

    -0.98

    -1.01 -0.98

    -1.00

    -1.00

    -1.00

    -0.98-1.00

    -1.00

    -0.97

    -0.97

    -1.21

    -1.16-1.26

    -1.50

    -1.25

    -1.00

    -0.75

    -0.50

    -0.25

    0.00

    0.25

       S   e   t   t    l   e   m   e   n   t    (   i   n .    )

    Survey Accuracy

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    South Jackson Street and First Avenue South

    (Primary Surface Survey Control Point –

     Y04)

    Settlement

    14

    •  All readings shown are based on WSDOT survey data.

    • The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.

    • Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.

       S   e

       t   t    l   e   m   e   n   t    (   i   n .    )

    -0.87

    -0.87

    -0.87

    -0.87

    -0.87

    -0.87

    -0.91-0.98

    -1.10

    -1.10

    -1.10 -1.10 -1.10 -1.10 -1.10 -1.10 -1.14 -1.10 -1.10 -1.10 -1.14 -1.10

    -1.500

    -1.250

    -1.000

    -0.750

    -0.500

    -0.250

    0.000

    0.250

    Survey Accuracy

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    South Jackson Street and First Avenue South

    (Secondary surface survey control point –

     JACK) 

    Settlement

    15

    •  All readings shown are based on STP survey data.

    • The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.

    • Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.

    -1.16

    -1.16

    -1.18

    -1.24

    -1.18

    -1.15

    -1.14

    -1.16

    -1.22

    -1.18

    -1.24

    -1.18

    -1.21

    -1.22 -1.22

    -1.08

    -1.14

    -1.16

    -1.15

    -1.14

    -1.14

    -1.16

    -1.13

    -1.16-1.07

    -1.37

    -1.28-1.39

    -1.50

    -1.25

    -1.00

    -0.75

    -0.50

    -0.25

    0.00

    0.25

       S   e

       t   t    l   e   m   e   n   t    (   i   n .    )

    Survey Accuracy

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    South Jackson Street and Second Avenue Extension South

    (Primary Surface Survey Control Point –

     GP232)

    Settlement

    16

    •  All readings shown are based on WSDOT survey data.

    • The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.

    • Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.

       S   e   t   t    l   e   m   e   n   t    (   i   n .    ) -0.43

    -0.43

    -0.63 -0.63 -0.63

    -1.5

    -1.25

    -1

    -0.75

    -0.5

    -0.25

    0

    0.25

    Survey Accuracy

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    South King Street and Second Avenue South

    (Primary Surface Survey Control Point –

     X39)

    Settlement

    17

    •  All readings shown are based on WSDOT survey data.

    The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.

    • Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.

       S   e   t   t    l   e

       m   e   n   t    (   i   n .    )

    Survey Accuracy

    -1.26 -1.26

    -1.5

    -1.25

    -1

    -0.75

    -0.5

    -0.25

    0

    0.25

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    Settlement

    18

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    First Avenue South between Railroad Way South

    and South Royal Brougham Way(Primary Surface Survey Control Point  – Y09)

    Settlement

    19

    •  All readings shown are based on WSDOT survey data.

    • The blue points represent the net change in elevation detected at a single reading as compared to original baseline elevation.

    • Three survey teams are collecting and analyzing data: WSDOT, STP and the City of Seattle.

    -0.71-0.75 -0.75

    -1.5

    -1.25

    -1

    -0.75

    -0.5

    -0.25

    0

    0.25

       S   e   t   t    l   e   m

       e   n   t    (   i   n .    ) Survey Accuracy

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    Viaduct

    20

    Crews assessing viaduct during semiannual inspection.

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    Western Avenue

    21

    = water line

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    Pioneer Square bui ld ing

    Completed 60 buildingassessments. No structural

    damage.

    • Coordinating with property

    owners on property condition

    surveys.

    22

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    Repairing

    Preparing the access pit wall

    Feb. 17, 2015

    23

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    Bertha’s breakthrough

    Feb. 19, 2015

    24

    BERTHAreaches dayl ight  

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    Repair ing

    Tidying up the access pit

    Feb. 24, 2015

    25

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    Repair ing

    26

    Bertha in the access pitMarch 4, 2015

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    UPDATE

    PHOTO

    Repair ing

    27

    Crews prepare Bertha’s outer

    shield for removal

    March 17, 2015

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    Repair ing

    28

    Bertha’s top shield isremoved

    March 19, 2015

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    Repair ing

    29

    Bertha’s first side shield isremoved

    March 21, 2015

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    Repair ing

    31

    Crews prepare the cutterheadand drive unit for the big lift

    March 27, 2015

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    Repair ing

    The cutterhead and

    drive unit emerge

     from the pitMarch 30, 2015

    32

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    Repair ing

    The cutterhead and

    drive unit are placed on

    the repair platformMarch 31, 2015

    33

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    Repair ing

    34

    The drive unit is removed

     from the cutterhead

     April 3, 2015

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    Repair ing

    35

    The drive unit is removed

     from the cutterhead

     April 3, 2015

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    Repair ing

    36

    The cutter drive unit on itsrepair platform

     April 6, 2015

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    How toRE CH US

    Website:

    www.AlaskanWayViaduct.org

    Twitter:@BerthaDigsSR99

    Email:

    [email protected]

    Hotline:

    1-888-AWV-LINE

    Our information center,

    Milepost 31, is located

    at 211 First Ave. S. in

    Seattle’s Pioneer

    Square neighborhood