SR99 Bored Tunnel-Assessment of Settlement Impacts ... - SCATnow

More documents

Recommendations

Info

cover section north of Thomas Street. The cut-and-cover section would unbraid thetunnel’s stacked northbound and southbound roadways into a side-by-sideconfiguration that matches the existing grade of Aurora Avenue N. near MercerStreet. Where the bored tunnel emerges at Thomas Street, the cut-and-coverexcavation would be about 85 feet deep. There would be a north tunnel operationsbuilding over the tunnel on the east side of Sixth Avenue N. between Thomas andHarrison Streets. The lowest level of the building would be around 75 feet below theground surface. The cut-and-cover section of the tunnel would extendapproximately 450 feet to a portal on the north side of Harrison Street.The entire tunnel would have continuous six-foot shoulders on the roadway’s westside to maximize access to an enclosed emergency walkway along the west side ofthe tunnel (Figure 2).Figure 2. Proposed Bored Tunnel Cross-Section.The Alaskan Way Viaduct & Seawall Replacement Program March 2010Proposed SR 99 Bored Tunnel - Assessment of Settlement Impacts to Buildings 8Public Disclosure Request 11-0123 for Elizabeth Campbell - 2nd installment
2.2.3 North Access Project DescriptionThe depressed at-grade roadway extending north from the tunnel portal at HarrisonStreet to the existing alignment of Aurora Avenue N. would comprise the bulk of theNorth Access Project. There would also be surface roadway modifications to workwith the new on- and off-ramps leading to and from the tunnel that merge intoRepublican Street as well as the mainline merge with Aurora Avenue N.At the north portal area, Sixth Avenue N. would be extended from Harrison Streetto Mercer Street, and John, Thomas, and Harrison Streets would be reconnectedacross Aurora Avenue N. Ramps would be constructed to provide northbound offand southbound on movements to and from SR 99 at Republican Street.Northbound on-ramps and southbound off-ramps to and from the intersection ofHarrison Street and Aurora Avenue would also be constructed.2.3 Description of Other Program ElementsSeveral elements, both roadway and non-roadway, would complete the programstrategy and provide transportation benefits in the downtown Seattle area. Along thewaterfront, these elements would include demolishing the existing viaduct, a newAlaskan Way surface street built in the footprint of the existing viaduct after it isdemolished, a connection to Elliott and Western Avenues from the new AlaskanWay surface street by constructing a new bridge structure along the footprint of theexisting viaduct, a new promenade adjacent to the seawall between S. King and PikeStreets, and seawall improvements. In the tunnel’s north portal area, the MercerStreet corridor between Interstate 5 (I-5) and Elliott Avenue would be improved,and Broad Street would be removed between Ninth Avenue N. and Taylor AvenueN. New peak-period transit service to downtown would also be provided. Theseother program elements, led by the City of Seattle and King County, would improveaccess and mobility to and through downtown while enhancing Seattle’s waterfrontand adjacent neighborhoods.The Alaskan Way Viaduct & Seawall Replacement Program March 2010Proposed SR 99 Bored Tunnel - Assessment of Settlement Impacts to Buildings 9Public Disclosure Request 11-0123 for Elizabeth Campbell - 2nd installment
Page 5 and 6: Table of Contents1.0 EXECUTIVE SUMM
Page 7 and 8: Proposed SR 99 Bored Tunnel -Assess
Page 9 and 10: The damage classification for the r
Page 11 and 12: 2.0 Program Description & Backgroun
Page 13: 2.2 Tunnel Project DescriptionThe T
Page 17 and 18: 3.0 Building AssessmentThe tunnel a
Page 19 and 20: . History of settlement - based upo
Page 21 and 22: 4.0 Settlement and Ground Movement4
Page 23 and 24: Figure 3. Generalized Transverse Se
Page 25 and 26: 5.0 Building Response to Excavation
Page 27 and 28: Table 2. Building Damage Classifica
Page 29 and 30: tunnel axis), the settlement trough
Page 31 and 32: 6.0 Results of Structural Analyses6
Page 33 and 34: Therefore, high-rise buildings alon
Page 35 and 36: Table 4. Summary of Building Damage
Page 37 and 38: PROPERTY IDPROPERTY ADDRESSAPPROXIM
Page 47 and 48: 7.0 ReferencesAttewell, P.B.; Yeate
Page 49 and 50: Appendix ATunnel Alignment Plan She
Page 51 and 52: A1Legend! ! SeawallPiersAreawaysTun
Page 53 and 54: T161NOTES :1) ASSESSMENT OF DAMAGE
Page 55 and 56: A3LegendMONORAILEBIAreawaysTunnelTu
Page 57 and 58: Appendix BBuilding Damage Classific
Page 59 and 60: Figure B-1. Graphical Illustration
Page 61 and 62: Appendix CBuilding Assessment Forms
Page 63 and 64: List of Abbreviations Used in Build
Page 65 and 66:
Distance to Tunnel:• Horizontal o
Page 67 and 68:
example, T311 and T312 are the same
Page 69 and 70:
Appendix DBoscardin and Cording Ana
Page 71 and 72:
Table of Contents1.0 B&C ANALYSIS M
Page 73 and 74:
1.0 B&C Analysis MethodThe building
Page 75 and 76:
Offset, Yδε hLβDeparture from tu
Page 77 and 78:
Figure D-1. Building Location Coord
Page 79 and 80:
1.00.90.80.7G((X-XT)/KZ)0.60.50.40.
Page 81 and 82:
2.0 B&C Damage ClassificationsTable
Page 83 and 84:
3.0 E/G RatioE/G is based upon Tabl
Page 85 and 86:
4.0 Building HeightBuilding height
Page 87 and 88:
5.0 Foundation DepthThe analysis to
Page 89 and 90:
Appendix EMonitoringThe Alaskan Way
Page 91 and 92:
Table of Contents1.0 INTRODUCTION .
Page 93 and 94:
1.0 IntroductionThe potential groun
Page 95 and 96:
2.0 Basic MonitoringManual survey p
Page 97 and 98:
3.0 Tilt Meter Monitoring3.1 Goals3
Page 99 and 100:
4.0 GPS Monitoring4.1 Goals4.2 Impl
Page 101 and 102:
5.0 Automated Monitoring Total Stat
Page 103 and 104:
6.0 Distributed Data Acquisition6.1
Page 105 and 106:
The emerging capability of wireless
Page 107 and 108:
7.0 Levels of MonitoringEach buildi
show all

SR99 Bored Tunnel-Assessment of Settlement Impacts ... - SCATnow

Create successful ePaper yourself

Delete template?

Save as template?