Old dock – single dock that received art, food, general deliveries and trash New dock – isolated art deliveries, isolated trash dock
Isolated art delivery and holding. Future art elevator.
Not the line of rock under the existing B Level floor slab. This was encountered for the installation of electrical service lines and steam lines.
Note the vibration testing wires on the ground. There were additional sensors placed on the floor above to measure the building transmissions.
Work Plan shows blasting area, electrical service trenching, rock removal
3D laser survey was able to create clean models of space even with a rat’s nest of piping and wiring in place.
Vibration Issues, temporary storm and steam lines needed to complete excavation.
Shows the piping that remained in place during the modeling process.
Rock trenching under the B Level completed by the trenching wheel from the earlier picture. Had to complete some test excavation to confirm footing sizes to determine path for electrical lines.
Similar work completed for the removal of a couple of other columns.
Fire stair remained operational during work. Dust control was critical here as Kitchen was just above here.
These are the early piles of rock removed. We thought we were in good shape. We thought wrong.
Rock removal in a checkerboard pattern to prevent to much unreinforced lateral forces on the rock. Expecting 100 kips per lin ft from bearing wall above.
Remember the blue area on the Work Plan. This is as close as the heavy hammers could get to the existing building.
Digging the utility trench
Reinforcing in preparing for shot-crete installation. Still see temporary shorring beam other temp shoring for removed column.
THIS IS THE 20 MINUTE POINT
Two-ply blind-side waterproofing system. This was a custom designed system for this particular installation because while most underground waterproofing is accessible via excavation, this installation is completely inaccessible for ever. No room for error.
Crossbeam to be installed. This area is then removed while the concrete structure has been installed around it.
2012 9 Philadelphia Museum of Art Construction Project
Philadelphia Museum of Art Art Handling FacilityCarl 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:
Sections APPROXIMATE LINE OFAPPROXIMATE EXISTING ROCKGRADE NEW UTILITY TRENCH
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
VIBRATION STANDARDS• 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
Machine Used to Cut Interior Rock and Trenches Wire 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 PLANPlan created to locate blastingsites and identify where reliefwould be availableOrange a green locations atbottom where additionalincremental tests done withthe 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
Vibration Warning LevelVibration Monitoring results from Blast #11
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
This opening is the original access toB Level in the earlier slide.Temporary shoring micropile.Line of original footing.
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
ADDITIONAL BEAMTO BE INSTALLEDTO CARRY NEEDLEBEAMSTHIS AREA TO BEREMOVED FORFUTURE ELEVATOR Permanent Shoring for Future Corridor Penetration
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