Download - WSDOT's tunnel briefing for City Council
-
8/9/2019 WSDOT's tunnel briefing for City Council
1/32
Organization
Date
Seattle City Council
May 18, 2015
-
8/9/2019 WSDOT's tunnel briefing for City Council
2/32
Today’sAgenda
• SR 99 Tunnel Project
update
• Settlement update, ongoing
monitoring
• Construction progress
photos
2
-
8/9/2019 WSDOT's tunnel briefing for City Council
3/32
Repairing
BERTHA3
The cutterhead on its repair
platform
-
8/9/2019 WSDOT's tunnel briefing for City Council
4/32
Repairing
BERTHA4
Milling thrust seal on cutter
column
-
8/9/2019 WSDOT's tunnel briefing for City Council
5/32
Repairing
BERTHA5
Removal of inner cylinder and
agitator from main bearing
Cracks in the main
bearing bull gear
-
8/9/2019 WSDOT's tunnel briefing for City Council
6/32
Repairing
BERTHA6
Damaged pinion gear
Cutter drive motor
-
8/9/2019 WSDOT's tunnel briefing for City Council
7/32
Settlement
REPORTS7
Two reports
• WSDOTo Interim Settlement Evaluation Report,
Shannon & Wilson, Inc.
• Seattle Tunnel Partnerso Technical memorandum regarding ground
settlement from dewatering during
construction, Brierley Associates
-
8/9/2019 WSDOT's tunnel briefing for City Council
8/32
Multiple
AQUIFERS8
-
8/9/2019 WSDOT's tunnel briefing for City Council
9/32
‐18
‐17
‐16
‐15
‐14
‐13
‐12‐11
‐10
‐9
‐8
‐7
‐6
‐5
‐4
‐3‐2
‐1
0
1
2
3
4
5
1 2 /
1 / 1 4
1 2 /
8 / 1 4
1 2 / 1
5 / 1 4
1 2 / 2
2 / 1 4
1 2 / 2
9 / 1 4
1 /
5 / 1 5
1 / 1
2 / 1 5
1 / 1
9 / 1 5
1 / 2
6 / 1 5
2 /
2 / 1 5
2 /
9 / 1 5
2 / 1
6 / 1 5
2 / 2
3 / 1 5
3 /
2 / 1 5
3 /
9 / 1 5
3 / 1
6 / 1 5
3 / 2
3 / 1 5
3 / 3
0 / 1 5
4 /
6 / 1 5
4 / 1
3 / 1 5
4 / 2
0 / 1 5
4 / 2
7 / 1 5
5 /
4 / 1 5
N O R M A L I Z E D P I E Z O M
E T E R I C H E A D C H A N G
E ( f e e t )
DPM‐1 at Elev. ‐119'
DPM‐1 at Elev. ‐134'
DPM‐1 at Elev. ‐169'
PZ‐8 at Elev. ‐124' (outside)
PZ‐7 at Elev. ‐134' (outside)
Upper Aquifer, December to March, April, & May 1st
Current Groundwater Levels
Groundwater
levels currently
stable –
drawdown notincreasing
Source: Shannon
and Wilson report
Middle Aquifer, December to March, April, & May 1stLower Aquifer, December to March, April, & May 1st
9
-
8/9/2019 WSDOT's tunnel briefing for City Council
10/32
Settlement
REPORTS10
Five hypotheses from Shannon & Wilson report1. Pioneer Square has a long history of settlement.
Settlement occurred before the project and continues
to occur. May be due to compression of subsurfacewood debris and soft soil, traffic loading, etc.
2. Construction projects in the vicinity including
dewatering and excavation contributed to settlement.
3. Downtown Seattle is active seismic zone and groundvibrations contributed to settlement.
4. Project dewatering activities caused soils to
compress causing settlement. Compression or
consolidation of Holocene deposits.5. Compression of glacially overridden soils.
-
8/9/2019 WSDOT's tunnel briefing for City Council
11/32
-
8/9/2019 WSDOT's tunnel briefing for City Council
12/32
Settlement
REPORTS12
Calculated elevation change since 2010 based on LiDAR analyses. This figure
indicates the presence of localized areas of settlement that were present prior
to project activities in the area.
-
8/9/2019 WSDOT's tunnel briefing for City Council
13/32
Settlement
REPORTS13
InSAR analysis
• 7/10/12 – 11/5/14
• 11/5/14 – 12/7/14
• 12/7/14 – 1/8/15
-
8/9/2019 WSDOT's tunnel briefing for City Council
14/32
Expanded
MONITORING14
Jack Main
-
8/9/2019 WSDOT's tunnel briefing for City Council
15/32
Settlement
MONITORING15
-
8/9/2019 WSDOT's tunnel briefing for City Council
16/32
Settlement
MONITORING16
• 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.
• +/- 0.125-inch margin of error for each reading.
• 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)
S e t t l e m e n t ( i n . )
‐ 0 . 1
6
‐ 0 . 1
6
‐ 0 . 1
6
‐ 0 . 1
6
‐ 0 . 2
0
‐ 0 . 2
0
‐ 0 . 2
0
‐ 0 . 2
0
‐1.5
‐1.25
‐1
‐0.75
‐0.5
‐0.25
0
0.25
Survey
Accuracy
-
8/9/2019 WSDOT's tunnel briefing for City Council
17/32
-
8/9/2019 WSDOT's tunnel briefing for City Council
18/32
Settlement
MONITORING18
• 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.
• +/- 0.125-inch margin of error for each reading.
• 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 . 1
6
‐ 0 . 1
6
‐ 0 . 2
0
‐ 0 . 1
6
‐1.5
‐1.25
‐1
‐0.75
‐0.5
‐0.25
0
0.25
Survey
Accuracy
-
8/9/2019 WSDOT's tunnel briefing for City Council
19/32
Settlement
MONITORING19
-
8/9/2019 WSDOT's tunnel briefing for City Council
20/32
South Main Street and First Avenue South
(Primary Surface Survey Control Point – X05)
Settlement
MONITORING20
• 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.
• +/- 0.125-inch margin of error for each reading.
• 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 . 7
1
‐ 0 . 7
1
‐
0 . 6
7
‐ 0 . 7
5
‐ 0 . 7
1
‐ 0 . 7
1
‐ 0 . 7
5
‐ 0 . 8
3
‐ 0 . 9
4
‐ 0 . 9
4
‐ 0 . 9
4
‐ 0 . 9
4
‐ 0 . 9
8
‐ 0 . 9
4
‐ 0 . 9
4
‐ 0 . 9
4
‐ 0 . 9
8
‐ 0 . 9
8
‐ 0 . 9
4
‐ 0 . 9
8
‐ 0 . 9
8
‐ 0 . 9
8
‐ 0 . 9
8
‐ 0 . 9
8
‐ 0 . 9
8
‐ 0 . 9
8
‐ 0 . 9
8
‐ 0 . 9
8
‐1.5
‐1.25
‐1
‐0.75
‐0.5
‐0.25
0
0.25
Survey
Accuracy
-
8/9/2019 WSDOT's tunnel briefing for City Council
21/32
South Main Street and First Avenue South
(Secondary Surface Survey Control Point – MAIN)
Settlement
MONITORING21
• 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.
• +/- 0.125-inch margin of error for each reading.
• 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
. )
‐ 1 . 0
4
‐ 1 . 0
8
‐ 1 . 1
5
‐ 1 . 1
2
‐ 1 . 1
5
‐ 1 . 0
3
‐ 1 . 0
6
‐ 1 . 0
6
‐ 1 . 1
0
‐ 1 . 1
0
‐ 1 . 1
4
‐ 1 . 0
9
‐ 1 . 1
0
‐ 1 . 0
9
‐ 1 . 1
0 ‐ 0 . 9
5
‐ 1 . 0
0
‐ 0 . 9
8
‐ 1 . 0
1
‐ 0 . 9
8
‐ 1 . 0
0
‐ 1 . 0
0
‐ 1 . 0
0
‐ 0 . 9
8
‐ 1 . 0
0
‐ 1 . 0
0
‐ 0 . 9
7
‐ 0 . 9
8
‐ 0 . 9
7
‐ 1 . 0
0
‐ 1 . 0
6
‐ 0 . 9
7
‐ 1 . 0
1
‐ 0 . 9
8
‐ 0 . 9
8
‐ 0 . 9
8
‐ 1 . 0
2
‐ 1 . 2
1
‐ 1 . 1
6 ‐ 1 . 0
0
‐ 1 . 0
0
‐ 0 . 9
8
‐ 1 . 1
3
‐ 1 . 0
6
‐ 1 . 0
3
‐ 1 . 0
7
‐ 1 . 0
3
‐ 1 . 0
0
‐ 1 . 0
7
‐ 1 . 0
6
‐ 1 . 0
7
‐1.5
‐1.25
‐1
‐0.75
‐0.5‐0.25
0
0.25
Survey
Accuracy
-
8/9/2019 WSDOT's tunnel briefing for City Council
22/32
South Jackson Street and First Avenue South
(Primary Surface Survey Control Point – Y04)
Settlement
MONITORING22
• 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.
• +/- 0.125-inch margin of error for each reading.
• 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 . 8
7
‐ 0 . 8
7
‐ 0 . 8
7
‐ 0 . 8
7
‐ 0 . 8
7
‐ 0 . 8
7
‐ 0 . 9
1
‐ 0 . 9
8
‐ 1 . 1
0
‐ 1 . 1
0
‐ 1 . 1
0
‐ 1 . 1
0
‐ 1 . 1
0
‐ 1 . 1
0
‐ 1 . 1
0
‐ 1 . 1
0
‐ 1 . 1
4
‐ 1 . 1
0
‐ 1 . 1
0
‐ 1 . 1
0
‐ 1 . 1
4
‐ 1 . 1
0
‐ 1 . 1
4
‐
1 . 1
4
‐ 1 . 1
4
‐ 1 . 1
8
‐ 1 . 1
8
‐ 1 . 1
8
‐
1.5
‐1.25
‐1
‐0.75
‐0.5
‐0.25
0
0.25
Survey
Accuracy
-
8/9/2019 WSDOT's tunnel briefing for City Council
23/32
South Jackson Street and First Avenue South
(Secondary surface survey control point – JACK)
Settlement
MONITORING23
• 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.
• +/- 0.125-inch margin of error for each reading.
• 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 . )
‐ 1 . 1
6
‐ 1 . 1
6
‐ 1 . 1
8
‐ 1 . 2
4
‐ 1 . 1
8
‐ 1 . 1
5
‐ 1 . 1
4
‐ 1 . 1
6
‐ 1 . 2
2
‐ 1 . 1
8
‐ 1 . 2
4
‐ 1 . 1
8
‐ 1 . 2
1
‐ 1 . 2
2
‐ 1 . 2
2
‐ 1 . 0
8
‐ 1 . 1
4
‐ 1 . 1
6
‐ 1 . 1
5
‐ 1 . 1
4
‐ 1 . 1
4
‐ 1 . 1
6
‐ 1 . 1
3
‐ 1 . 1
6
‐ 1 . 1
8 ‐ 1 . 0
7
‐ 1 . 0
6
‐ 1 . 1
9
‐ 1 . 2
2
‐ 1 . 3
7 ‐ 1 . 2
8
‐ 1 . 3
9 ‐ 1 . 2
1
‐ 1 . 2
8
‐ 1 . 2
4
‐ 1 . 2
4
‐ 1 . 1
9
‐1.5
‐1.25
‐1
‐0.75
‐0.5
‐0.25
0
Survey
Accuracy
-
8/9/2019 WSDOT's tunnel briefing for City Council
24/32
South Jackson Street and Second Avenue Extension South
(Primary Surface Survey Control Point – GP232)
Settlement
MONITORING24
• 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.
• +/- 0.125-inch margin of error for each reading.
• 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 . 4
3
‐ 0 . 4
3
‐ 0 . 6
3
‐ 0 . 6
3
‐ 0 . 6
3
‐ 0 . 6
3
‐1.5
‐1.25
‐1
‐0.75
‐0.5
‐0.25
0
0.25
Survey
Accuracy
-
8/9/2019 WSDOT's tunnel briefing for City Council
25/32
South King Street and Second Avenue South
(Primary Surface Survey Control Point – X39)
Settlement
MONITORING25
• 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.
• +/- 0.125-inch margin of error for each reading.
• 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 . )
‐ 1 . 2
6
‐ 1 . 2
6
‐ 1 . 3
0
‐
1.5
‐1.25
‐1
‐0.75
‐0.5
‐0.25
0
0.25
Survey
Accuracy
-
8/9/2019 WSDOT's tunnel briefing for City Council
26/32
Settlement
MONITORING26
-
8/9/2019 WSDOT's tunnel briefing for City Council
27/32
First Avenue South between Railroad Way South
and South Royal Brougham Way
(Primary Surface Survey Control Point – Y09)
Settlement
MONITORING27
• 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.
• +/- 0.125-inch margin of error for each reading.
• 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 . 7
1
‐ 0 . 7
5
‐ 0 . 7
5
‐ 0 . 7
9
‐1.5
‐1.25
‐1
‐0.75
‐0.5
‐0.25
0
0.25
Survey
Accuracy
-
8/9/2019 WSDOT's tunnel briefing for City Council
28/32
South Cut and Cover
TUNNEL28
Crews smooth the concrete
roadway deck inside the cut
and cover section of tunnel
-
8/9/2019 WSDOT's tunnel briefing for City Council
29/32
SOUTH OPERATIONSBuilding
29
Structural steel is
taking shape
PLACEHOLDER
Visualization of the
completed building
-
8/9/2019 WSDOT's tunnel briefing for City Council
30/32
Building the
NORTH PORTAL30
The north portal continues to
take shape
-
8/9/2019 WSDOT's tunnel briefing for City Council
31/32
Building the
NORTH ACCESS31
The future off ‐ramp to
Aurora Avenue
-
8/9/2019 WSDOT's tunnel briefing for City Council
32/32
How toREACH US
Website:
www.AlaskanWayViaduct.org
Twitter:
@BerthaDigsSR99
Email:
Hotline:
1-888-AWV-LINE
Our information center,
Milepost 31, is located
at 211 First Ave. S. in
Seattle’s Pioneer
Square neighborhood.32