4/9/2015 Construction steps for MIVAN 55 Step 9: Striking of wall formwork K N JHA Department of Civil Engineering IIT Delhi Step 8: Concrete pouring and compaction Pitampura TV Tower in New Delhi, K N JHA Department of Civil Engineering 235 m height constructed using slipform IIT Delhi 56 Straight Slipform-Actual photograph K N JHA Department of Civil Engineering IIT Delhi 57 1 4/9/2015 Straight Slipform.Schematic view K N JHA Department of Civil Engineering IIT Delhi 58 Part Plan of a typical slipform K N JHA Department of Civil Engineering Part plan for straight slipform IIT Delhi 59 Slipforming for tapered structures K N JHA Department of Civil Engineering IIT Delhi 60 2 . K N JHA Department of Civil Engineering Slipform in progress for the chimney IIT Delhi 62 Tapered slipform K N JHA Department of Civil Engineering 275 m high RCC slipformed tapered chimney at 2 x 500 MW Anpara Thermal Power Station in U.4/9/2015 Inclined slip form K N JHA Department of Civil Engineering IIT Delhi 61 Slipform for chimney in progress A chimney of 275 m height.P. 30 m base diameter. and 20.8 m top diameter was built by using slipform method at Anpara in U.P. IIT Delhi 63 3 . The flying forms are more common in high rise buildings for rapid cycle construction where in large repetitions are possible and thus justifying their relatively high initial cost of fabrication. The form units are further relocated at new location with virtually no disassembly of parts to form concrete elements. K N JHA Department of Civil Engineering Construction of Pier (Jammu Udhampur Raillink Project) IIT Delhi 64 Slipforming of octagonal shaped RCC bridge piers K N JHA Department of Civil Engineering Slipforming of octagonal shaped RCC bridge piers in progress for the Panvel River Viaduct at Ratnagiri IIT Delhi 65 Flying formwork The flying form is a system of formwork which is assembled into form units usually at ground and is located to form concrete elements at the site location. K N JHA Department of Civil Engineering IIT Delhi 66 4 .4/9/2015 Construction of Pier using slipform Concrete pier of 80 m height was constructed using slipform for the Jammu Udhampur Railway bridge project. trusses or shores. IIT Delhi Flying Formwork Cycle 5 .4/9/2015 A typical flying formwork consists of sheathing member (mostly plywood). wooden beams as stringers and joists. IIT Delhi Flying Formwork Cycle K N JHA Department of Civil Engineering Step-2 • Form assembly Is then moved and placed into exact position by movable dollies. K N JHA Department of Civil Engineering In case of flying formwork all the members are assembled together to allow lifting of the whole system in one piece which is in contrast of hand set forms. Joists are timber or aluminium beams connected in most cases to deep trusses. IIT Delhi Flying formwork K N JHA Department of Civil Engineering Step-1 • Forms are preassembled at ground level • Entire assembly is lifted and placed on existing floor or at desired level by crane and hoist line. • Special attention on its movement has to be given. mechanical and plumbing work is done. IIT Delhi Flying Formwork Cycle K N JHA Department of Civil Engineering Step-5 • Then the form assembly is moved to the edge of the support system by dollies.4/9/2015 K N JHA Department of Civil Engineering Step-3 • Form assembly is adjusted to correct height and attached firmly with other modules. IIT Delhi Flying Formwork Cycle K N JHA Department of Civil Engineering Step-4 • Form assembly support systems are lowered to bring the form down. • This process is done by the hydraulic jacks places under the formwork. IIT Delhi Flying Formwork Cycle 6 . • Reinforcement steel is fixed and electrical. hotels. K N JHA Department of Civil Engineering IIT Delhi Table Forms operation procedure 75 • After aligning the formwork. the reinforcement is tied and provisions for other services are laid. • From here the table form is picked up by crane for locating it to upper story. Used primarily for multi. • Concrete is poured and allowed to gain strength. • The formwork is struck with the help of jacks and without disassembly of table form it is rolled towards the façade (exterior) of the building. • Again the formwork is hoisted to the upper level fot the next cast. IIT Delhi • Assembling the table form at the ground level 7 .storey building (such as residential flats. offices and commercial buildings) construction works with regular plan layouts and long repetitive structures. Capable of providing very high speed of construction. K N JHA Department of Civil Engineering • Shifting to the location where the floor is to be cast.4/9/2015 K N JHA Department of Civil Engineering Step-6 • Form assembly tilts when about half of assembly is out of the floor slab. hostels. IIT Delhi Flying Formwork Cycle Another variant of flying form. 4/9/2015 Table formwork being flown K N JHA Department of Civil Engineering Table formwork being flown to its new location IIT Delhi 76 Table formwork K N JHA Department of Civil Engineering Table formwork being positioned IIT Delhi 77 Transportation arrangement K N JHA Department of Civil Engineering Transportation arrangement for table formwork IIT Delhi 78 8 . 4/9/2015 Table form in practice K N JHA Department of Civil Engineering Extensive use of Table form at Oberoi Mall Project Site Mumbai (Courtesy L&T) IIT Delhi 79 Table module being shifted K N JHA Department of Civil Engineering Table module being shifted to new location (Note the props in folded position) IIT Delhi 80 Table module being transported using crane K N JHA Department of Civil Engineering Table module being transported using crane (note the lifting fork) IIT Delhi 81 9 . 4/9/2015 Table form being shifted on trolley K N JHA Department of Civil Engineering Table form being shifted on trolley to the desired location IIT Delhi 82 PERI Table Formwork Peri offers modular tables which are pre assembled for immediate use. The sizes are: Table Module VT 200/215 x 400 Table Module VT 250/265 x 400 Table Module VT 200/215 x 500 Table Module VT 250/265 x 500 K N JHA Department of Civil Engineering IIT Delhi 83 Peri Uniportal Table form 84 K N JHA Department of Civil Engineering IIT Delhi PERI Uniportal Table form 10 . The modules are available in four standard sizes which allow optimal adjustment to the building. 11 .4/9/2015 Table swivel head K N JHA Department of Civil Engineering Table swivel head used in props IIT Delhi 85 Skytable form -PERI K N JHA Department of Civil Engineering Skytable form (see the trusses) IIT Delhi 86 Tunnel form K N JHA Department of Civil Engineering IIT Delhi Fixed bracing. Need to dismantle into smaller modules before reuse. 4/9/2015 Tunnel form K N JHA Department of Civil Engineering IIT Delhi Wall and ceilings are cast together. Tunnel formwork system K N JHA Department of Civil Engineering Tunnel formwork system IIT Delhi 89 Construction steps-Tunnel form K N JHA Department of Civil Engineering Construction of starter wall for the tunnel formwork system IIT Delhi 90 12 .
Report "4. Presentation on Formwork 2 by Neeraj Jha Delhi"