Aaron Ammanniti Senior deisgn project Fall quarter final presentation.
Final fall senior design presentation
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Transcript of Final fall senior design presentation
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BRAYS BAYOU + BRIDGEFall 2015 Concept Presentation
Presented by:
Julianne Crawford, Avi Gori, Kasia Nikiel
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Project Description + Goals
➔ Design Brays Bayou channel modifications
➔ Reconstruct of Greenbriar Bridge between Braeswood & Main
➔ Consider of additional stormwater flow from 7200 Main
➔ Coordinate with 7200 Main development for other features
➔ Protect Meyerland area from future flooding
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Brays Bayou between Fannin St. and Greenbriar St.
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Greenbriar Bridge
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Background Research + Modeling
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Project Brays➔ Funded by US Army Corps and HCFCD➔ Comprehensive re-design of Brays Bayou
◆ Channel Modifications◆ Bridge Replacement/Renovation◆ New Detention Area
➔ Aimed at mitigating riverine flooding throughout Brays Bayou Watershed ➔ Status:
◆ Upper Reach: Completed◆ Middle Reach: In Progress◆ Lower Reach: In Progress
➔ Scheduled to be completed in 2021
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Project Brays Proposed Improvements
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100-year Floodplain (TSARP Model - 2004)
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100-year Floodplain (Current Conditions - 2010)
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100-year Floodplain (Post Project Brays - 2021)
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100-year Floodplain (TSARP) at Site Location
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100-year Floodplain (Post Project Brays) at Site Location
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Bridge - Current Conditions
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Concept Design
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OPTION 1: Widen the Channel
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HEC-RAS Geometry for Greenbriar Section
Main Street
Greenbriar Street
Fannin Street
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Cross Section Comparison - Downstream (RS 56478)
Current 100-yr Level (44.07 ft)
PPB 100-yr Level (43.47 ft)
PPB Geometry
Current Geometry
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OPTION 1: Widen the Channel -- BRIDGE
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OPTION 2: Retaining Wall
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HEC-RAS Geometry for Greenbriar Section
Main Street
Greenbriar Street
Fannin Street
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Cross Section Comparison - Upstream (RS 59882)
Current 100-yr Level (45.70 ft)
PPB 100-yr Level (44.96 ft)
PPB Geometry
Current Geometry
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OPTION 2: Retaining Walls -- BRIDGE
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Existing Plan View of Bridge Deck
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87.0’
Bridge Tie-Ins With Existing Roads
87.0’
5% Grade 4.35’
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Proposal
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Modified Scenario
➔ Retaining walls and some
widening on both banks
from Main to Greenbriar
➔ Retaining walls and
substantial widening on the
right bank from Greenbriar
to Fannin
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Modified HEC-RAS Geometry Examples (Upstream - RS 58740 )
Modified Geometry
PPB Geometry
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Modified HEC-RAS Geometry Examples (Downstream - RS 57958)
Modified Geometry
PPB Geometry
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Modified Scenario Results - RS 59882
Modified Geometry
PPB Geometry
Modified 100-yr LevelPPB 100-yr Level
44.71 ft 44.96 ft
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Modified Scenario Results - RS 56478
Modified Geometry
PPB Geometry
Modified 100-yr LevelPPB 100-yr Level
43.47 ft 43.37 ft
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Proposed Bridge Cross-Section
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Proposed Plan View of Widened Bridge Deck
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Impact of Proposed Modifications
➔ Modifications along the Main to Fannin portion of the channel should not have
drastic adverse effects on downstream sections.
➔ According to the 100-year floodplains, both current and post project brays, the
areas downstream of our site already face a much lower inundation hazard
than the middle and upper reaches.
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Moving Forward
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Brays Bayou
➔ Finalize channel modifications for Main to Fannin segment
➔ Add additional cross sections to existing HEC-RAS geometry
➔ Perform unsteady state HEC-RAS analysis
➔ Incorporate additional flow from hotel if necessary
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Proposed HEC-RAS Geometry Modification
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Bridge
➔ Finalize aesthetic design with 7200 Main St. group
➔ Determine appropriate foundations
➔ Superstructure/Substructure design of the bridge
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Meyerland
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May 2015 Storm - Comparison of Flooding to Current 100-year Floodplain
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May 2015 Storm - Damage Reports in Meyerland
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100-year Floodplain (Post Project Brays) at Meyerland
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Appendix
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Channel Profile
Fannin Greenbriar Main
Direction of Flow
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Construction
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Green Space
➔ Finalize design for green space with hotel
➔ Ensure that all trails are integrated smoothly
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Meyerland 100-yr Floodplain - Current Conditions v. Post Project Brays