朝陽土地工程私人有限公司ZHAO YANG GEOTECHNIC PTE LTDHead Office : Zhao Yang Geotechnic Pte LtdNo. 31 Mandai Estate #02-01, Innovation Place,Singapore 729933 Tel: (65) 6861 8488 Fax: (65) 6898 4160
Website : www.zhaoyang.com.sgEmail : [email protected]
Branch Office : Zhao Yang Geotechnic Sdn BhdNo.63A, Jalan Molek 3/10, Taman Molek Johor Bahru 81100, Johor.Tel/Fax:+607 3513364
Malaysia Office : Zhao Yang Geotechnic Sdn BhdSuite 05 – 02, 5th Floor, Wisma TKS,No. 518A 3rd Mile, Jalan Ipoh ,51200 Kuala LumpurTel: +603 4040 3133
31
Ground improvement Works:
• Wet Speed Mixing (WSM)• Deep Soil Mixing (DSM)• High Pressure Jet Grouting • Tube A Manchetta (TAM) grouting• GeoPier System (impact pier /
Grouted impact pier)• Vibro Stone Columns• Vibro Concrete Columns (VCC)
• Rock Fissure Grouting• Chemical / Permeation
Grouting• Cavity grouting• Secant Soil Mix Pile Wall• Bored Pile Base Grouting• Compaction grouting
Geotechnical Engineering Works:
• Bored Micro piling (Size:150-500mm dia.)• Removal Temporary / Permanent Ground
Anchor ( WL=20ton – 150ton)• Toe Pin for D-wall & Bored Pile • Soil Nailing / Rock Bolting• Bored Piling / CBP Wall • VDW Secant Pile Wall
• Design & Built For (ERSS)• Soil Investigation • Steel / Micro Pile extraction • Pre- drill & Drive Sheet Pile / Soldier Piles/Steel Plate lagging• Recharge & relief well • Slope Repair Technology (SRT)
Geopier System Fissure Rock Grouting ERSS-Exposed Grout Pile Wall
WSM Works in Progress
Temporary Removal Ground Anchor
Exposed Secant Soil Mix Pile (WSM Technique)
Grouted Impact Pier
TAM Grouting
Jet Grouting
Bored Micropile Soil Nail & Gird RC Beam
Soil Nail/Rock bolt & shotcrete Work
Double Head System (VDW)Secant Soil Mix Pile Wall Driving Steel Plate/Sheet / Soldier Pile
Bored Piling
Soil Investigation
ZHAO YANG GEOTECHNIC PTE LTD - Provides ONE-STOP SOLUTION FOR GROUND IMPROVEMENT &
GEOTECHNICAL ENGINEERING WORKS
ZHAO YANG GEOTECHNIC PTE LTD - Provides ONE-STOP SOLUTION FOR GROUND IMPROVEMENT &
GEOTECHNICAL ENGINEERING WORKS
Pre-Drilling Sheet Pile
Email : [email protected]
Alternative Piling System using WSM technique
to install Secant Soil Mix Piles Wall.
Installation of Secant Soil Mix Piles Wall Using
WET SPEED MIXING ( WSM ) Technique• What is WSM Technique? WSM Technique use combination of jet grouting & Mechanical Mixing Blades to mix
the soil. Proven technique able to treat most types of soil in singapore ranging from very Soft
marine clay, Peaty clay, F1, F2 , silty sand, clayey sand , Coarse sand and Bukit Timah granite Soil GV & GVI until SPT “N” value < 100N, except rock & obstruction.
Use High Revolution ( RPM : 40 ~ 90 ) for Soil mixing Assured quality with uniform mixing and consistent diameter ( ranging from 0.6m to
2.6m ). Ground Improvement Min. Shear strength (Cu) = 300Kpa to 1500Kpa Proven deepest treatment depth 48m. Environmentally friendly. Low noise and vibration free High Productivity and use less manpower Cost effective
Sequence of InstallationSet up Guide Wall & WSM installation in Progress
Installation of I –Beam immediately upon completion of WSM
TYPE (1) WSM (WITHOUT SIDE NOZZLES JETTING)
Ground Level
Rock Layer
Sand Layer
Marine Clay Layer
F1, F2, Bukit Timah GV,GVi layer, SPT N
value < 100
Step 1:Position the ABI rig on the WSM peg point
Step 2 :Drilling and mixing of WSM column in the ground with cement
Step 3 :Withdraw the WSM rod and mixing monitor to complete the grouting
Step 4 :Completed WSM point
Step 5 :Install I-Beam to required depth
I-Beam
Rock Layer
Step 1:Position the drill rig on the WSM peg point
Step 2 :Drilling and mixing WSM column in the ground with cement
Step 3 :Withdraw the WSM rod and mixing monitor to complete the grouting
Step 4 :Completed WSM point
Sand Layer
Marine Clay Layer
F1, F2, Bukit Timah GV,GIV
layer, SPT N value < 100N
Ground Level
Jetting
TYPE (2) WSM (WITH SIDE NOZZLES JETTING )))
Jetting
I-Beam
Step 5 :Install I-Beam to required depth
Jetting
Advantage of using WSM Method for ‐ERSS
Proven WSM Free Standing Wall for One Basement construction
Part One
Earth retaining structure system (ERSS ) ( One Basement Construction )
Before trimming Secant Soil mix Piles. ( FREE standing wall 3.5m ~ 4.0m height)
After trimming Secant Soil Mix Piles.
Earth retaining structure system (ERSS ) ( One Basement Construction )
After trimming Secant Soil Mix piles
Cast‐in situ Permanent retaining wall with Secant Soil Mix Piles.
Earth retaining structure system (ERSS ) ( One Basement Construction )
Free Standing Wall using WSM technique ( reclaim sand & marine clay layers )
Free Standing Wall using WSM technique ( reclaim sand & marine Clay layers )
Earth retaining structure system (ERSS ) ( One Basement Construction )
Free Standing Wall using WSM technique ( Bukit Timah Granite GV & GVI Soil )
Free Standing Wall using WSM technique ( Bukit Timah Granite GV & GVI Soil )
Advantage using WSM Method for –ERSS
• TOP DOWN BASEMENT CONSTRUCTION METHOD USING SECANT SOIL MIX PILE WALL SYSTEM
( PART TWO )
Wet Speed Mixing (WSM) Technique
Guide wall for secant soil mix piles installation
Soil Mixing in Progress
Wet Speed Mixing (WSM) Technique
Installation of H‐pile immediately after completion of wsm
Preparation of capping beam slab for top down construction
Earth retaining structure system (ERSS ) ( Two Basement Construction )
Secant soil mix Piles wall before trimming
Secant soil mix piles wall after trimming at basement level one
Earth retaining structure system (ERSS ) ( Two Basement Construction )
Basement level one Opening at level one
Earth retaining structure system (ERSS ) ( Two Basement Construction )
Top down construction Basement level one slab cast
Exposed WSM ground improvement at basement level two
Earth retaining structure system (ERSS ) ( Two Basement Construction )
Trimmed secant soil mix wall at basement level two
Trimmed and exposed I ‐beam at basement level two
Earth retaining structure system (ERSS ) ( Max. excavation depth : 14 to 18m for Basement Construction )
Secant Soil Mix Pile Wall with multi layers strut ( DTL 1 ‐ C906 )
Conner Secant Soil Mix Piles Wall with multi layers strut ( DTL 1 ‐ C906 )
Earth retaining structure system (ERSS ) ( Max. excavation depth : 12m for Basement Construction )
DTL 1 C907 ( ERSS Wall above existing MRT NSL tunnel )
DTL 1 C907 ( ERSS Wall above existing MRT NSL tunnel )
Entrance Shaft Construction Beside old Shop house
Oval Shaft Construction using Secant Soil Mix Pile Wall
• Real time Monitoring – Data Logger attached.
DATA LOGGER WSM
Drilling Depth Rotation Speed
Grout VolumeFor every meterdepth
Grout Pressure
Grout Flow rate
Grout Period (min)
Before Test After Test
SAMPLE TESTING FOR WSM
Result of coring sample testing
Report No Coring Point No Cast Date Coring Date Lab Test Date Sample NoTCR % Unconfined Comp.
Strength, qu (kPa)Elastic Modulus,
E (Mpa)
≥ 85 ≥ 1000 ≥ 150
1 C139 23/10/2012 4/1/2013 7/1/2013CR‐1
1005738 1017
CR‐2 4703 400CR‐3 2629 436
2 C113 24/10/2012 8/1/2013 12/1/2013CR‐1
943383 680
CR‐2 1059 608CR‐3 4439 548
3 C76 29/10/2012 10/1/2013 12/1/2013CR‐1
995520 717
CR‐2 6163 1225CR‐3 5745 1131
4 C53 1/11/2012 15/1/2013 19/1/2013CR‐1
963341 418
CR‐2 4397 605CR‐3 4472 350
5 C34 31/10/2012 17/1/2013 19/1/2013CR‐1
954458 450
CR‐2 2433 487CR‐3 3178 421
Proven Projects Track Record – Using Wet Speed Mixing
(WSM) Technique in SINGAPORE
朝陽土地工程私人有限公司ZHAO YANG GEOTECHNIC PTE LTD
PROJECT WORK SCOPE MAIN CONTRACTOR
DTL 1 – C 902 Ground Improvement Work using WSM (TBM Launching Shaft) Shanghai Tunnel Engineering Pte Ltd
DTL 1 – C 906 Secant Soil Mix Pile Wall using WSM Sembawang E & C Pte Ltd
DTL 1 – C 907 Secant Soil Mix Pile Wall using WSM Taisei Corporation
DTL 2 – C 916 Ground Improvement Work using WSM(TBM Launching & arrival Shaft)
McConell Dowell SEA
DTL 2 – C 917 Ground Improvement Work using WSM ( TBM Launching & Arrival Shaft)
Alpine Bau GMbh
DTL 2 – C 918 Ground Improvement Work using WSM ( Cut & Cover tunnel & TBM launch & arrival Shaft)
Alpine Bau GMbh
DTL 2 – C 919 Ground Improvement Work using WSM (TBM Launching Shaft) Sembawang E & C Pte Ltd
DTL 2 – C 921 Ground Improvement Work using WSM ( Entrance Shaft ) Ssangyong E & C Pte Ltd
DTL 3 – C 927 Ground Improvement Work using WSM (TBM Launching & arrival Shaft)
CMC Ravenna
DTL 3 – C 932 Ground Improvement Work using WSM ( Escape Shaft and TBM Launching & arrival Shaft)
Sato Kogyo (S) Pte Ltd
DTL 3 – C 935 Ground Improvement Work using WSM ( Station, Entrances & TBM Launch Shaft )
Leighton-John Holland JV
MCE – C 482 Ground Improvement Work using WSM ( Cut & Cover tunnel & Pipe Piles Gap Sealing )
Ssangyong E & C Pte Ltd
MCE – C 483 Ground Improvement Work using WSM ( Pipe jacking shaft ) Samsung C & T Corporation
MCE – C 487 Ground Improvement Work using WSM ( Cut & Cover Tunnel ) Daelim Industrial Co. Ltd
PROJECT WORK SCOPE MAIN CONTRACTOR OWNER
Punggol Waterway (Part 1)
Ground Improvement works ( GIW ) -using WSM
KOH Brothers C & E HDB
Punggol East Contract 39 GIW - using WSM for Driveway Sunhuan Construction PL HDB
Punggol East Contract 40 GIW - using WSM for Driveway & Promenade
Sunhuan Construction PL HDB
Punggol East Contract 41 GIW - using WSM for Driveway Sunhuan Construction PL HDB
Kallang Whampoa Contract 20CPunggol East Contract 36
GIW - using WSM for Driveway
GIW - Using WSM for Driveway
Sembawang E & C PL
Sunhuan Construction PL
HDB
HDB
Jardin Condominium Secant Soil Mix Pile Wall using WSM Rich Construction PL Private
No. 2 & 4 East Coast Avenue
Secant Soil Mix Pile Wall using WSM Expand Construction PL Private
The Cape No. 25 Amber Road
Secant Soil Mix Pile Wall and Basement GIW - using WSM
Rich Construction PL Private
CMC No. 597 East Coast Road
Ground Improvement Work using WSM Daiya Engineering & Construction PL
Private
Lorong 33 Geylang Basement GIW - using WSM Admin Construction PL Private
Centropod at 80 Changi Road
Basement GIW - using WSM Lim Wen Heng Construction PL Private
Natura @ Hillview Secant Soil Mix Pile Wall using WSM Lim Wen Heng Construction PL Private
NUS Project Secant Soil Mix Pile using WSM Expand Construction PL Private
HDB @ Sembawang Rd N5C18
Secant Soil Mix Pile using WSM Yau Le Construction (S) Pte Ltd HDB
THANK YOU