Environmental Groups

1
San Francisco-Oakland Bay BridgeEast Span
Seismic Safety Project
Contractors Outreach Program
November 10, 2000
2
Civil/Environmental Steven Hulsebus, P.E.
3
Project Limits
Project Limits
4
Related Projects

• West Approach
• West Span
• West Viaduct
• Yerba Buena Island Tunnel

• East Span Interim Retrofit
• East Span Replacement

5
Skyway Contract
6
Civil / Environmental Concerns

• Contractor Access / Staging Areas
• Permitting
• Environmental Constraints

7
Civil / Environmental Concerns

• Contractor Access / Staging Areas
• Permitting
• Environmental Constraints

• Caltrans will ensure access to the project site
• Contractors will need to identify and secure
  other laydown and fabrication sites
• Vehicle access to Yerba Buena Island will be
  restricted
• USCG will require 24 hour access through the work
  zone

8
Contractor Access on YBI
Vehicular Access
Potential Barge Mooring Areas
USCG Access
USCG Search and Rescue Base
9
Yerba Buena Island

• Heavy topography -- 60 meter elevation
  change
• Steep slopes
• Narrow winding roads
• USCG base for 24 hour Search and Rescue unit
• Lots of underground utilities

10
Contractor Access at Oakland Side
PGE Submarine Lines
Vehicular Access
Pacbell Submarine Line
EBMUD De-Chlor Plant
PGE Substation
EBMUD Outfall
11
Oakland Touchdown

• Caltrans maintenance facilities
• Port of Oakland
• EBMUD De-chlorination facility and outfall
• PGE Substation

12
Oakland Touchdown
13
Civil / Environmental Concerns

• Contractor Access / Staging Areas
• Permitting
• Environmental Constraints

• Caltrans will secure permits
• for the project
• DMMO for disposal of dredged materials
• COE and BCDC for fill in the bay
• USFWS / NMFS for species of concern
• SWPPP

14
Civil / Environmental Concerns

• Contractor Access / Staging Areas
• Permitting
• Environmental Constraints

• Historic Structures
• Environmentally Sensitive Areas
• Seasonal Restrictions for In-water Construction
• Noise
• Hazardous Materials

15
Environmental Constraints on YBI
Historic Structures
USCG Facilities
16
YBI Special Aquatic Sites
17
Environmental Constraints at Oakland Side
18
Oakland Touchdown Special Aquatic Sites
19
Skyway Contract Dredge Access Area
20
Typical Dredge Section
21
Known Submarine Utilities
N
Unknown Utility Approximate Location
Navy Power Cable
PGE 10 Gas line
PGE Bay Cable 6 Abandoned in Place
ATT Fiber Optic
Existing SFOBB
Navy Cable
Phone Cables
EBMUD Outfall
PGE Bay Cable 3 Abandoned in Place
Known Submarine Utilities in the Project
Vicinity Not to Scale
2/22/99
22
Submarine Utilities
1.2 m
To San Francisco
2.4 m
PGE 10 Gas Line
Navy Power Cable
To Oakland
23
Utilities
Eastbound
Westbound
NOT TO SCALE
24
Electrical Substation in Skyway
Access Stairways
Section

• Substation required for the bridges electrical
  system
• Access will be visible above the bridge barriers

25
Conduits in Roadway Barriers
26
Electrical Service Platform
27
Roadway Light Standards

• Heights range from
• 7.5 m to 20 m

28
Existing Seismic Sensor Location
29
San Francisco-Oakland Bay BridgeEast Span
Seismic Safety Project
30
Geology Anthony R. Dover, P.E., G.E.
31
Fugro-EM Reports
32
Delineation of Areas Addressed
33
Project Location Map
34
Marine Exploration Location Map
35
Structural ContoursBase of Young Bay Mud
36
Isopach of Merritt-Posey-San Antonio Formations
37
Structural ContoursTop of Lower Alameda Alluvial
Sand
38
Top Franciscan and Onlap ofLower Alameda
Alluvial Sediment
39
Structural Contours - Top of Franciscan Formation
Near Buena Island
40
Phase 3 Bathymetry Contours
41
3-D View of Multi-Beam Bathymetry
42
Phase 3 CPT Locations
43
Boring and Cross SectionLocation Map - SFOBB
Main Span
44
Boring and Cross Section Location Map - SFOBB
Skyway
45
Key to Cross Sections
46
Conceptual East-West Soil ProfileOutside (South)
of Recent Paleochannel
47
Subsurface Cross Section A1-A1with Su and CPT
Tip Resistance
48
Subsurface Cross Section A2-A2with Su and CPT
Tip Resistance
49
Subsurface Cross Section A3-A3with Su and CPT
Tip Resistance
50
Subsurface Cross Section A4-A4with Su and CPT
Tip Resistance
51
Subsurface Cross Section A5-A5with Su and CPT
Tip Resistance
52
Skyway Temporary Falsework Towers

• Required during construction to support portion
  of superstructure
• Two between piers E2-E3 connection to Main Span
• One between piers E16-E17 connection to Oakland
  Shore Approach
• Pile foundations will be required
• Contractor to select pile type, length, section
  based on criteria provided
• Maximum working axial load is limited to 1.8 MN
  with
• F.S. (side shear) 1.5
• Recommended piles and size range
• Steel pipe 0.41 to 0.61 m OD
• Square concrete 0.41 to 0.61 m on a side
• Steel H- pile 0.36 m width
• Soil profiles and example pile calculations to be
  provided to contractor

53
Subsurface Cross Section L-Lwith Su and CPT Tip
Resistance
54
Expected Variation of Pile Tip Bearing Strata
55
Axial Pile Design Parameters and ResultsSFOBB
Pier E7-Eastbound (Boring 98-49)
56
Predicted Setup of Skin Frictionin Clay
57
Soil Resistance to Driving andPredicted Blow
Counts
58
Pile Installation Demonstration (PID) Project
59
PID Project

• Document and evaluate hammer performance, pile
  driveability, and driving behavior
• Demonstrate marine construction techniques and
  equipment
• Develop welding procedures, specifications, and
  document results
• Measure noise (underwater, airborne) and ground
  vibration from pile driving
• Evaluate effectiveness of underwater noise
  attenuation barriers
• Observe marine mammal (seals) behavior

60
PID Project

• 3 Steel pipe piles (1 vertical,
• 2 battered at 16)
• 2.438 m diameter, wall thickness
• 40 to 70 mm
• Each pile constructed in 4
• sections
• Specified pile tip elevation -102 m
• Pile length 107 m
• Hammers Menck MHU 500 and
• MHU 1700

61

PID Project
62
PID Project - Status and Results to Date
(November 8, 2000)

• Pile Number 1 3 Sections Installed (Vertical)
• First section ran 6 m
• Pile tip currently at elev. - 78 m (end of
  section 1C)
• Menck MHU 500 Hammer used (full stroke at EOD)
• Blow count near EOD 20 to 30 bpqm
• Pile Number 2 1 Section Installed (Battered
  16)
• First section ran 6 m
• Welding
• Field pile splice welding is clearly a learning
  curve
• All field splice welds have required some repair

63
PID Project - Status and Results to Date
(November 9, 2000)

• Pile Number 1 All 4 Sections Installed
  (Vertical)
• First section ran 6 m
• Pile tip currently at Elev. - 101 m (end of
  section 1D)
• Menck MHU 500 used on first 3 sections
• Menck MHU 1700 used on final section (At 100
  stroke)
• Blow count near EOD About 30 bpqm
• Pile Number 2 1 Section Installed (Battered
  16)
• First section ran 6 m
• Welding
• Field pile splice welding is clearly a Learning
  Curve
• Two field splice welds have required some repair
• Most recent splice - No repair

64
San Francisco-Oakland Bay BridgeEast Span
Seismic Safety Project
65
Structures Overview Amer Bata, P.E.
66
Project Limits
Project Limits
67
SFOBB Contract Segments
Skyway
Oakland
Segment
YBI
SAS
Hinge A
Hinge E
Frame 1
Frame 2
Frame 3
Frame 4
68
Cross Section
Shoulder
Shoulder
Five Traffic Lanes
Bike / Ped
69
Segment 1-YBI Structures

• Viaduct Modification
• Temporary Detours
• Transition Structures
• EB On-Ramp

70
YBI Viaduct Modification

• Structural Concrete 3500 M3
• Bar Reinforcing Steel 650,000 Kg

71
Bent WB1
72
Detour Structures

• Structural Concrete 6,700 M3
• Bar Reinforcing Steel 1,600,000 Kg
• Structural Steel 5,700,000 Kg

73
West Bound Detour
74
Eastbound Detour
75
EB Detour Tie-In
76
YBI Transition Structures

• Structural Concrete 54,000 M3
• Bar Reinforcing Steel 7,700,000 Kg
• Structural Steel 1,200,000 Kg

77
YBI Transition Structures-Bent W4
78
YBI Transition Structures-Bent W10
79
YBI-EB On-Ramp
80

Segment 2 - SAS Bridge

• Structural Concrete 25,000 M3
• Bar Reinforcing Steel 5,200,000 Kg
• Structural Steel 52,000,000 Kg

81
Dual Box Girder
82
Bridge Elevation
657 m
385 m
80 m
180 m
12 m
Elev. 160m
Pier W2
Aprox. OG along PG Line
Pier 1 Tower
Pier E2
83
Bridge Plan-Cable Layout
84
Looping Cable Anchorage - Plan

• Cap beam
• Two deviation saddles, one jacking saddle

85
Looping CableAnchorage - Elevation

• Roadway elevation differential
• Independent tie-down systems

86
Looping Cable AnchorageSide Elevation

• West anchorage cap beam to bridge box girder
  connection
• Pier column to cap beam connection
• Gravity foundation system

87
East Cable Anchorage Layout

• Main cable geometry at Pier E2

88
Prefabricated Parallel Wire Strand Cable
89
Cable Dehumidification

• Compressed dry air (40 humidity)
• Targeted air humidity inside the cable should be
  less than 60

90
Main Span-Tower Layout Details
91
Main Span-Pier W2 Details
92
East Pier
93
Temporary Towers
94
Segment 3 - Skyway

• Structural Concrete 220,000 M3
• Bar Reinforcing Steel 27,300,000 Kg
• Structural Steel 33,000,000 Kg
• Piling 15,000 M

95
Segment 4 - Oakland TD

• Structural Concrete
• 15,000 M3
• Bar Reinforcing Steel
• 5,400,000 Kg
• Piling 7,500 M

96
Oakland TD Elevation
97
Structure Plan - Oakland Approach
98
Construction Staging WB Traffic Detour

• Skyway WB
• Main Span WB EB
• Construct Oakland Fill
• Construct Oakland EB Detour
• Traffic on Oakland EB Detour
• Construct WB Approach
• YBI Initial Viaduct Modification Portion of WB
  Transition
• WB Detour Structure
• Portion of EB Detour Structure

99
Traffic On WB Detour

• Construct Oakland EB Landing
• Remove upper deck at YB4
• Complete EB YBI Detour Tie-In
• Switch traffic to YBI EB detour structure

100
Traffic On Detour Structures

• Continue Oakland EB Landing
• Remove existing bridge from Bent 48 to YB4
• Continue EB Skyway

101
Construction Staging

• Construct EB and remaining WB Transition
  Structures
• Switch EB traffic to new bridge
• Complete YBI Viaduct Modifications
• Switch WB traffic to new bridge

102
Construction Staging

• Remove detour structures
• Construct EB on- ramp
• Complete bike path

103
San Francisco-Oakland Bay BridgeEast Span
Seismic Safety Project
104

• Skyway Structures
• Sajid Abbas Ph.D., P.E.
• Rafael Manzanarez, P.E.

105
Project Limits
106
San Francisco Bay Area
107
Existing Structure
108
Existing SFOBB East Span
109
Loma Prieta Earthquake
110
New Bridge
111
Design Philosophy
112
Contract Limits
113
Proposed SFOBB East Span
114
Self-Anchored-Suspension Bridge
115
Skyway Structures
116
Skyway
117
Site Geology
118
Skyway Framing System
119
Geology
120
Conceptual Soil Profile Beneath Skyway
121
Top of Franciscan Rock
122
Pile Tip Bearing Strata
123
Piles
124
Foundation Types on Skyway
125
Description of Pile Foundation

• 2.5 m constant outside diameter CISS piles.
• Driven shells with composite reinforced concrete
  fill in upper section
• Batter 18 and 112
• Shell (thickness 51-77 mm) fy345 MPa
• Concrete fc25 Mpa
• Reinforced Steel fy415 Mpa
• Lower core bond connection uses shear rings
• Upper core bond uses welded shear studs

126
Target Tip Elevations

• Piles generally tipped 4 m into LAA sands (Elev.
  - 95 m NGVD)
• Bias pile tips into sand layers
• Driveability by 1,000 kJ (735 ft.kip) hammer

127
Pile Details
128
Hydraulic Pile Hammer
Jamuna River Bridge Mencke MHU 1700
129
Pile Installation

• Pile shells to be driven 160
• Average pile length 94 m
• Total pile length 15,000 m
• Maximum pile weight 365 t
• Min. Hammer energy (_at_90) 1,000 kj
• Field splices not permitted in zones of high
  bending

130
Pile Caps
131
Pile Cap
132
Pile Cap
133
San Francisco-Oakland Bay Bridge
134
San Francisco-Oakland Bay Bridge
135
San Francisco-Oakland Bay Bridge
136
San Francisco-Oakland Bay Bridge
.
.
137
San Francisco-Oakland Bay Bridge
138
San Francisco-Oakland Bay Bridge
139
San Francisco-Oakland Bay Bridge
140
San Francisco-Oakland Bay Bridge
141
San Francisco-Oakland Bay Bridge
142
San Francisco-Oakland Bay Bridge
.
.
143
San Francisco-Oakland Bay Bridge
144
Piers
145
Transverse Section
146
Service Loads on End Piers

• Creep, Shrinkage, Elastic Shortening
• Imposed Displacement on Pier Tops
• Jacking in the middle of the frame

147
Box Pier
148
Superstructure
149
Skyway Framing System
150
Frame 1
151
Box Girder
152
Light Rail Configuration
.
153
Bike/Pedestrian Path
154
Bike/Pedestrian Path
155
Typical Cantilever
156
Typical Cantilever
157
Prestressing Details
158
Phase 1 Foundation
159
Phase 2 Construction of Pier Table
160
Phase 3 Cantilever Construction
161
Phase 4 Closure of Exterior Spans
162
Phase 5 Jacking and Closure of Interior Span
163
Phase 6 Closure of Hinge Span
164
Phase 7 Bridge Completion
165
Expansion Joints
166
Expansion Joints
167
Hinge Beam Details
168
Hinge Beam Details
169
Hinge Bearing
170
Hinge Beam Details
171
Hinge Erection
172
Construction Sequence 1
173
Construction Sequence 2
174
Construction Sequence 3
175
Construction Sequence 4
176
Construction Sequence 5
177
Transition Span
178
Skyway Cast-In-Place (1) Hinge A
179
Skyway Cast-In-Place (2) Hinge A
180
Skyway Cast-In-Place (3) Hinge A
181
Skyway Cast-In-Place (4) Hinge A
182
Construction Sequence for Hinge (Oakland 1)
183
Construction Sequence for Hinge (Oakland 2)
184
Construction Sequence for Hinge (Oakland 3)
185
Construction Sequence for Hinge (Oakland 4)
186
Skyway All The Way !
187
(No Transcript)
188
(No Transcript)
189
Go Build It !
190
San Francisco-Oakland Bay BridgeEast Span
Seismic Safety Project
191

• Specifications
• Sharon Naramore, P.E.

192
Specifications

• A B
• Working Days
• Metric Units
• Buy America
• Construction
• Surveying
• CRIP
• Marine Access
• Dredging

193
Specifications

• Concrete
• Precast QC
• (all new)
• Welding QC

194
Specifications

• Order of Work
• Existing Facilities
• Earthwork
• Piling
• Temporary Towers

195
Specifications

• Furnish Precast Concrete
• Segments
• Erect Precast Concrete
• Segments
• Modular Joint Assemblies
• Segmental Circular Bearings
• Overlays

196
Specifications

• Reinforcement
• Steel Structures
• Clean and Paint Structures
• Jack Superstructure

197
Information Handout

• Design Criteria
• Foundation Recommendations
• Precast Concrete Plant Audit Form
• Steel Products Plant Audit Form
• Caltrans UT Certification Application
• Mass Concrete Report
• PIDP Results Including Welding Reports

198
San Francisco 1906