construction dewatering means and methods presentation
TRANSCRIPT
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Construction Dewatering Means and Methods Presentation
Construction Dewatering Getting Your Project on Firm
Ground… …Before It Starts
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Topics Of Discussion
• Construction Dewatering • –What is it? • –Why do it? • The Consequences of Improper • Dewatering • Design Considerations • Subsurface Investigations and Soil Borings • Methods of Groundwater Control
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Dewatering: What is it?
• Intercepting/minimizing groundwater seepage from
• Entering an excavation. • Depressing the
piezometric water surfaceto a point below the excavation.
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Dewatering: Why do it?
Short Term Objectives
• Increase slope stability • Prevent loss of material • Reduce lateral/uplift pressure • Improve the excavation and the
backfill characteristicsof the excavation toallow construction to
• Proceed in a safe manner
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Dewatering: Why do it?
Intercept Seepage Long TermObjectives•Reduce or eliminate lateral and/or uplift
pressures •Achieve waterproofing objectives
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Improper Dewatering
• The Consequences • Blows, Rendering Excavation Subgrade Unstable • Boils/Piping, the Creation of Voids Rendering Slopes
and Subgrades Unstable • Excavation Support Systems Rendered Unstable • Future Settling• Lost Time• Decreased Worksite Safety
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Design Considerations
• Dominant Considerations • Location and Geologic Environment• Size and Depth of Excavation• Groundwater (Piezometric) Leve• Soil & Aquifer Characteristics (Hydraulic Conductivity) • Proposed Excavation Method and Excavation Support • Proposed Schedule • Avoiding Undesirable Side Effects • Proximity to Existing Structures, Potable and/or irrigation
wells.
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Dewatering Methods
• Open Pumping• Pre-Drainage -Wellpoints ,Deepwells,Eductors • Methods of cut off• –Soil Bentonite
–Interlocking Steel Sheet Pile–Concrete Caisson
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Dewatering Methods
• Dewatering Is the removal of water from solid material or soil by wet classification, centrifugation, filtration, or similar solid-liquid separation processes, such as removal of residual liquid from a filter cake by a filter press as part of various industrial processes.
• On a construction site, this dewatering may be implemented before subsurface excavation for foundations, shoring, or cellar space to lower the water table. This frequently involves the use of submersible "dewatering" pumps, centrifugal ("trash") pumps, eductors, or application of vacuum to wellpoints.
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INTRODUCTION TO VIJAY GROUP
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50 Years of Fire Protection System Experience
Access to over 100 engineers across 4 countries
VIJAY Offers to ADCC & OBI Unparallel Quality & Experience
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Few Projects Executed in India
Thermal Power Plants – 107Hydro Power Stations – 120Petro Chemical Complex – 7Nuclear Power Stations – 5Defense Establishment - 50
Airports – Chennai, MumbaiSteel Plants – 10
Refineries – 6
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Vijay Group• Established in 1959 – One of the oldest and renowned business
group in the country
• Head Quarters – 50,000 sq ft in Mumbai, India
• Vijay Group - #1 fire protection & safety system company in India for over 30 years
• Started projects in GCC - 1972
• Long term global relationship with top technology companies of the world – GE, Honeywell, Minimax, Kidde, Chemguard, Viking, Tyco - Sabre Safety..
• Professional Team of over 800 personnel
• Management Team with experience of over 200 man years
• Diversified Group
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Before 2006 – Some of the International Projects Completed
• Muscat Palace – Oman
• 4 Sub-station Wadi Jizan – Saudi Arabia
• Power Station in Al-Arish – Egypt
• W R C Project (transformer protection) – Iraq
• Tripoli Thermal Power Station – Libya
• Power Station - Hydrant & Deluge system – Sri Lanka
• Turbo Generators – Malaysia
• Condenser Fire Protection – Ghana
• Power Station - Sudan
• Hotel Lemeyer – Mauritius
• Supplied fire vehicles to Bahrain Fire Dept
• Supplied Safety equipment in Europe
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Moving Ahead As A GroupVijay Group
International Division •Vijay Arabia Fire & Security Systems (VASS) - QatarTurnkey Contracts in Fire & Security Systems•Vijay International FZE - UAE Trading in Fire & Security System •Vijay Fire Safety & Security Systems LLC Turnkey Contracts in Fire & Security system
•Vijay Infrastructure Limited•India Division•Product Division•Vijay Vehicles & Pumps Ltd Largest fire vehicle & multi-purpose vehicle•Vijay Sabre Safety Ltd Manufacturer of safety products & human protection equipments – JV with TYCO, US•Vijay Systems Engineers Manufacturer of passive fire protection – German Technology•Vijay Latex Products Ltd Manufacturer of medical products – Malaysian / USA Technology
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Moving Ahead As A GroupProject Division•Vijay Security Systems Pvt Ltd Fire & Security Systems•Vijay Transtech P Ltd Building Management System
•Trading Division• Vijay Exports P Ltd Trading of Agricultural Products, Metal Scrap & Stat
•Contracting Division•Vijay Infrastructure Limited