2012 9 Philadelphia Museum of Art Construction Project

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