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TRAINING REPORT ONCONSTRUCTION OF S+9 RESIDENTIAL BUILDINGSECTOR-8 IG NAGAR, JAGATPURAJAIPURIntroduction: It is a RAJASTHN HOUSING BOARD project in which construction of S+9 MIG 72 flats is to be carried out. The project is located at Jagatpura sector-8. Our project is having two buildings block-A and block-B.The building is provided with basement parking and stilt parking.Each floor is having 8 flats with 3 BHK.The estimated cost of each building is about 16 crores and it completion date is 15-3-2015.

Project Snapshot :The project is located Sector-8 Jagatpura. The project has good road connectivity. The project is targeted to the Medium Income Group.

P.C.C:After the process of excavation, laying of plain cement concrete that is PCC is done. A layer of 150 mm was made in such a manner that it was not mixed with the soil.

It provides a solid base for the raft foundation and a mix of 1:4:8 that is, 1 part of cement to 4 parts of fine aggregates and 8 parts of coarse aggregates by volume were used in it.

Laying of Foundation

At the site, Raft foundations was used to spread the load from a structure over a large area, normally the entire area of the structure. Normally raft foundation is used when large load is to be distributed and it is not possible to provide individual footings. Raft foundations have the advantage of reducing differential settlements as the concrete slab resists differential movements between loading positions. They are often needed on soft or loose soils with low bearing capacity.Raft Foundation had a thickness of 775 mm.Bars of 32 mm to 25 mm were used and chairs were used.

FORM WORK

Forms or moulds or shutters are the ones in which concrete is placed, so that it will have the desired shape or outline when hardened. Once the concrete develops adequate strength, the forms are removed. Forms are generally made of the materials like timber, plywood, steel, etc.

Scaffolding/props used:Scaffolding is a temporary structure used to support people and material in the construction or repair of buildings and other large structures. It is usually a modular system of metal pipes or tubes, although it can be from other materials.

CONCRETINGType of Cement Used :O.P.C Grade of concrete in coloumns:M-25Grade of concrete in P.C.C work:M-10Grade of concrete in Raft foundation:M-25

Concrete was made at the site only.Aggregates sizes :20 mm ,10mmFine aggregate (sand):zone 2Plasticizer was used as admixture REINFORCEMENT

Fe-500 grade of steel was used. High strength deformed bars conforming to IS: 1786 ,grade Fe 500, indicate yield stresses 500 N/mm2 are commonly used. Column

Total no. of columns in a floor was 125 , in which 18 have dimension of 450*450,24-375*375,14-375*230,16-1050*450,3-450*900,11-900*375,4-900*375,12-750*375,19-900*375,6-375*750,4-600*375,4-600*600*300,5-375*825,600*450*300. There were 10 bars used in the columns in which the corner bars were of dia. 25 mm ,and the remaining were 20 mm dia. till 4th floor. Ring/Tie bars:8 mm dia. bars were used as ring.The larger ring was of dimension 750*150 mm which holds the corner bars and the smaller ring was of dimension 350*150 which holds the inner bars.

Spacing between the rings:The spacing between the top and the next ring was 80 mm and also the same spacing was provided for the bottommost and the ring above it.Rest all the spacing between the rings was 120mm.

Cover block:Cover blocks are placed to prevent the steel rods from touching the shuttering plates and there by providing a minimum cover and fix the reinforcements as per the design drawings. Covers should be made of cement sand mortar (1:3). Ideally, cover should have strength similar to the surrounding concrete, with the least perimeter so that chances of water to penetrate through periphery will be minimized.

RETAINING WALLA retaining wall is a structure designed and constructed to resistthe lateral pressure of soil .It was the cantilever retaining wall which constructed at our site.A cantilever retaining wall is the free standing structure without any lateral support at its top.

MARKING AND LAYOUTWith the help of Grid Drawing we locate the centre line and other grids passing through the columns so that further casting of columns and other structural members can take place.

CONCLUSION

This training is comprehensive in filling the gap between the theoretical & practical studiesAt the site there was a good management system between the contractor, the consultant, and the client. I found that there was good understanding between the supervisor and the workers, though works are interdependent but there were no contradiction between them.

Thank-You