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TRANSCRIPT
FCS Na'onal Workshop
Environmental Applica'ons of Jet Grou'ng
Montreal, Quebec April 27, 2016
Stephen Custeau, P.Eng. ,MBA MATCON Environmental Ltd.
Outline
-‐ History of Jet Grou2ng -‐ How the technology works -‐ Applica2ons -‐ Case Histories for environmental applica2ons
Recochem Port Coquitlam New Westminster Pier John Hart Dam (cut off / ground improvement)
History of Jet Grou2ng
-‐ Japan (CCP) 70’s
-‐ Europe late 70’s -‐ NA – middle 80’s
How it works STEP 1 : DRILLING
STEP 3: PULL UP THE ROTATING JET
STEP 2 START JETTING WITH W/C GROUT MIX FROM THE BOTTOM
RESULT: ROUND COLUMN CONSISTING OF WATER/CEMENT MIX AND INSITU SOIL
Resul2ng Column
Geometry
Environmental Containment
Jet Grout Parameters
Flexibility
Range of Results
Single fluid Double Fluid Triple Fluid
Gravel 0.6-1.2 1.0-1.6 2.0-3.0 10-30 2,500-15,000Sandy Gravel 0.5-1.0 0.9-1.8 1.5-3.0 8-20 2,500-10,000
Silty Clay 0.5-1.0 0.8-1.5 1.2-2.8 5-15 2,500-7,500Clayly Silt 0.4-0.6 0.7-1.0 1.0-1.5 2-8 1,000-5,000
Clay 0.4-0.8 0.6-1.2 0.8-1.2 1-6 500-5,000
E (Mpa)Type of Soil Diameter (m) UCS (Mpa)
Hydraulic Conduc2vity = 10-‐6 to 10-‐9 m/s Depending on soil condi2ons and grout Mix (with or w/o bentonite).
QA/QC at Grout Plant
QC-‐ Monitoring and recording jedng
QC-‐ Monitoring and recording jedng
QA/QC-‐ Monitoring / Recording
Verifica2on
-‐ Coring -‐ Permeability tests (direct-‐indirect) -‐ Cross/holes, tomography -‐ Calipers -‐ Load test in case of piles
Typical JG Projects • Shoring/Cut-‐Off/Underpinning: North Vancouver -‐ Parcel 5 Richmond – The Mandarin False Creek-‐ Olympic Village New Westminster-‐ Mul2use Facility Centre • Cut-‐Off (environmental) Recochem, Port Coquitlam
New Westminster Pier John Hart Dam Zeballos Lake • Soil Improvement for Sejlement Control New Westminster-‐ Clarkson & Sixth • Piling Richmond – Paloma Parkade • Shals North Vancouver-‐ Esplanade & St. George IONA Treatment Plant (3 phases)
Recochem, Port Coquitlam
Port Coquitlam
Port Coquitlam
Port Coquitlam
Port Coquitlam
K= 10-‐7 cm/sec; 10-‐9 m/sec
New Westminster Pier
Loca2on
The Op2ons
The Site
The Site
Mapping the Columns
John Hart Dam John Hart Dam
Loca2on
Field Test
Produc2on Area
Field Test Area
Field Test
Drilling Procedures
Pre-‐drilling and PVC installa2on
Field Test Results
Very Congested Site!
Spoil/Reflow storage tanks
Bentonite mud storage tanks
Grout mix plant
Spoil/Reflow Management
Spoil/Reflow Management
Real Time Control
QA/QC
As Built
Ques2ons?
Stephen Custeau, P.Eng., MBA
MATCON Environmental Ltd.