Philadelphia Museum of ArtArt Handling Facility
Carl D. Freedman, AIA – Aegis Property Group
September 17, 2012
PRESENTATION OF FACILITY ISSUES WITH THE DEVELOPMENT
OF THE
NEW ART HANDLING FACILITY
PROJECT DEVELOPMENT TEAM:
New vs. Existing Loading Dock
Level C
Sections
APPROXIMATE EXISTING GRADE
NEW UTILITY TRENCH
APPROXIMATE LINE OFROCK
VIBRATIONS, DEMOLITION & BLASTING
• Vibration standards established in preliminary testing and research
• Equipment testing completed to determine equipment that could be used
• Test blasting competed to determine charge sizes and distances
• Vibrations at the art work were limited to 0.15 ppv for sustained vibrations (over 5 second in duration)
• Normally, ppv values for blasting would be double sustained levels, but, it was decided to keep the 0.15 ppv for all standards
• Normal ppv values for blasting near a building would be between 2.0 ppv and 3.0 ppv
VIBRATION STANDARDS
Machine Used to Cut Interior Rock and TrenchesWire on the Ground is for Vibration Testing
Test Blast Results Chart – for 0.15 PPV we could blast up to 73’ from the building
BLAST LAYOUT PLAN
Plan created to locate blasting sites and identify where relief would be available
Orange a green locations at bottom where additional incremental tests done with the first production blasts
Work Plan with blasting area, rock anchor installation, rock removal, electrical trenching
Vibra-Tech response to Work Plans with a vibration sensor location plan
BLASTING
Vibration Monitoring results from Blast #11
Vibration Warning Level
INTERIOR DEMOLITION – DUST CONTROL
• Early selective demolition on B Level before GMP was established
• 3D model of existing conditions created to trace existing lines
• Vibration and Environmental Controls• Temporary shoring conditions• Removal of existing columns
Structural Model
HVAC Model
Removal of Overburden – Test Pit in Northwest cornerThis location was used to access the B Level for Interior Excavation
Section B1 – Hammering of Concrete Slab
Temporary Storm Line During Excavation
Section B1 – Lowering of Floor Elevation
Interior Electrical Trenching Through Rock
Saw-cutting of Foundations and Retaining WallsColumn to be Placed on New Foundation
Temporary Shoring Structure for Column Foundation Removal
EXTERIOR EXCAVATION & DEMOLITION
• Stone wall deconstruction– Historic Preservation Issues / Laser Cleaning– Stone condition and deterioration– Stone testing
• Overburden removal• Rock removal process
– Blasting– Sawing– Grinding
Laser Cleaning
Removing the First Stone from Terrace Wall
Sandy debris – Precursor of a small issue with a few of the existing stone.
Saw Cutting Terrace Wall
End Results of Terrace Wall Cut
ROCK EXCAVATION – HIGHER ELEVATIONS
Installation of First Dewey-Dag Bar Rock Anchors
ROCK EXCAVATION CLOSE TO EXISTING BUILDING
This opening is the original access to B Level in the earlier slide.
Line of original footing.
Temporary shoring micropile.
LOGISTICS, WATERPROOFING& CONCRETE
• Logistics on a very tight site• Excavation efforts were not complete, but,
concrete needed to start to keep schedule• Utility trench ran continuously through hard
rock under the entire building addition• Unique conditions for waterproofing and
building close to rock walls
Permanent Shoring for Future Corridor Penetration
THIS AREA TO BE REMOVED FOR FUTURE ELEVATOR
ADDITIONAL BEAM TO BE INSTALLED TO CARRY NEEDLE BEAMS
TIGHT SITE LOGISTICS – POURING CONCRETE, EXCAVATING UTILITY TRENCH, ROCK REMOVAL AGAINST BUILDING
3D SURVEY & MODELING
• Scanning less invasive• Less costly than hand architectural or
engineering surveying• Accuracy with 1/8”• Have imaging of your entire facility• Can tailor the modeling completed to needs
THANK YOU AND HAVE A GREAT CONFERENCE
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