safety & quality aspects in '3-s' system of construction
TRANSCRIPT
A Project Study On
Safety & Quality Parameters & Techniques
in
‘3-S’ System of Construction
By-Sandeep Jain&Vipul Kumar
Outline
The Project
‘3-S’ System
Safety Management
Quality Assurance
Pros & Cons
Denouement
The Project
B.G. SHIRKE Construction Technology Pvt. Ltd.
SafetySpeed
‘3-S’ System
‘3-S’ System
Strength
4-Satge Process
Manufacturing
Storage & Curing
Transit
Erection
‘3-S’ System (4-Stage Process
Safety ManagementManufacturing Phase
Safety Management
Column Component
Manufacturing Phase
Beam Component
Shear Wall
Safety ManagementManufacturing Phase
Safety Management
Slab Component
Lift Core
Manufacturing Phase
Safety ManagementManufacturing & storage phase
Lift Core
Safety ManagementStorage :
Lift Core
Safety ManagementTransit :
Lift Core
While transporting, for the safety of people around particular attention given to:
• Recognized routes
• Shape, size and mass of the concrete elements
• Provision for temporary storage
• According to OHSMP : Site specific traffic management plan for traffic control barricades and road closure permits
• Provision for all weather access for delivery vehicle.
• To reduce hazards, the unnecessary transport of concrete elements, particularly where multiple loading and unloading is required , should be avoided wherever possible.
• Inspection of uncompacted backfilled excavation or overhead services before entering construction site
Safety ManagementErection Phase : 1. Erection Preparation
2. Temporary Bracing
3. Rigging Operation
4. Screeding
Erection Preparation Checklist :
Has traffic management been set up in accordance with the plan, and are suitably qualified persons available on site to undertake traffic management duties?
Has an area for the unloading of the precast elements been designated?
Does the design envelope of the plant encroach into any electrical “No-Go Zone”?
Has a document been prepared by the builder to verify that the erection platform can safely carry the construction and erection loads?
Are shop drawing for all precast elements available on site?
Are all lateral restraints (dowel bars, angle irons etc.) being installed and fixed in position during the erection of the precast concrete elements?
Has a Safe Work Method Statement (SWMS) been prepared for the High Risk Construction Work?
and the list continues with points regarding bracing, cranes, lifting points……..
Safety Management
Safety ManagementBracing :
• Pre-fab concrete components must be properly supported until they are permanently attached to prevent overturning or collapse.
• Wherever possible bracing should be fixed to the element before lifting.
• When it is necessary to attach the braces after the element has been positioned, the element should be held safely by the crane whilst the braces are installed on the upper face by the use of a ladder or alternative access system.
• A minimum of 2 braces are used for each element.
• Braces shall be attached to a flat surface which is capable of withstanding the applied load.
Rigging:
Workers involved with hoisting and rigging activities are trained in both safety and operating procedures. A safe rigging operation requires the rigger to know :
• The weight of the load The working load limit of the hoisting rope, slings.
• The capacity of the hoisting device - at least five times the anticipated load.
• The working load limit of the hoisting rope, slings, and hardware.
• Rigger must know how to lift the load so that it is stable.
• Safe practices – Manual inspection of wear and tear, Blind Lifting avoided.
• Lift-slab concrete operations involve fabricating pre-cast concrete components with lifting hardware embedded in them.
• IS 13367 : Part 1 : 1992 Safe use of cranes - Code of practice Part 1 General
• Means of Communication (What signals to be used)
Safety Management
Safety Management
Safety aspects in various stage of Erection Phase :
Safety Management
Lift Pin
Safety aspects in various stage of Erection Phase :
Safety Management
Safety ManagementPersonnel Safety : Use of PPE’s
Lift Core
Safety ManagementPersonnel Safety : Use of PPE’s
Lift Core
Safety ManagementPersonnel Safety : Signs and Signals
Lift Core
Safety ManagementPersonnel Safety : Signs and Signals
Lift Core
Safety ManagementPersonnel Safety : Toolbox Meet
Lift Core
QEHS Policy
Quality AssuranceManufacturing Phase
Anti-Corrosion Coating Prefabrication of R/F Cage
Concreting Demoulding
S. No. Process Test Material Tests/Checks Conducted Frequency
1 Pre - Concreting
Raw materials(e.g. Cement, sand, aggregates, water)
Sieve analysis, moisture content test, impuritiescontent etc.
Start of production Once in 12 months
Reinforcement Tensile strength testStart of production Once in 12 months
Steel moulds Reinforcement cage
Dimensional &visual check (mould)
1 cycle per month
2 Concreting Wet concreteSlump test, cubetest, temperaturecheck
(Site witness)
3 Post - ConcretingDryingconcrete
Visual inspections Dimensionalcheck (segment) Rapid Chloride Permeability(RCP) test
Every castEvery 8 weeksEvery 150 rings
4 CoatingCorrosionprotection coat
Wet film, dry film test, adhesion test
All steel R/f
5 Pre - Delivery All membersTensile (Pull-out) testTolerance checkFinal inspection
Every 50Every delivery
Quality AssuranceManufacturing Phase : Conduct of tests
Pros & ConsPros:
• Controlled casting environment
• Less Labour
• Maximizing repetition
• Rapid Speed of construction
• Work platform
• Fire resistant and durable.
• Versatile and optimized.
• Affordable and sustainable.
Pros & ConsCons:
• Only Mass or repetitive construction.
• Heavy Specialized machineries
• Skilled workmanship
• Small Margin of Error
• Serious Hazards
• Lack of customization
Denouement• Strong & Growing Strong
• Easy To Install
• Lower Lifetime cost
• Get the Job done Fast
• Talking Quality Here
• Good Looks
• Post-Occupational Safety
• Ease of Monitoring
Thanks