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  • SACPL

PROJECT - NORTHERN HILLS


1. INTRODUCTION:


CLIENT - M/S. N ROSE DEVELOPERS PVT. LTD.


ARCHITECT - K ARCH ARCHITECTS


STRUCTURAL CONSULTANT - SACPL


2. PROJECT DETAILS:


- Ground+3Basement+9 Podium Floors+5 Future Provision floors

52 typical floors+2 service floors+1 E- Deck floor


- 225m Height


- 17,63,382 Sq.ft. area


- Location: Northern Heights, Bharucha Road, Dahisar East, Mumbai, Maharashtra, 400068. (Latitude 19024’ N and Longitude 72086’ E).


Fig.- Location


3. WIND TUNNEL TEST


• Used to predict the wind loads and responses of a structure

• Done by RWDI Consulting Engineers (India) Pvt. Ltd, Trivandrum

• 1 : 400 scale model

• 2.4m x 1.8m wind tunnel

• Model surrounding details around 460 m radius

• 50 years return period



Fig.- Wind tunnel Model



Fig.- Model preparation stage



Fig.-Wind Tunnel Model



Fig.- Load sets


4.OBSERVATIONS


70% of the code loads stipulated as a minimum as per IS 16700: 2017



Fig.- Observations


4.REQUIREMENT OF TIE BEAMS


•To control torsional effects

•Provided at alternate 10 floors



Fig.- Model with tie beams


Fig.- Wing A & Wing B Typical Floor without ties


5. REQUIREMENT OF SPANDRELS


•To reduce time period

•Provided at every floors at marked locations



Fig. - Model with Spandrels


6.FOUNDATION SIZE WORKOUT


•Based on soil data inputs & architectural inputs, initial footing analysis done with 2.5m, 2.75m & 3m footing depth and following conclusion made on the basis of initial analytical observations.


•As per client’s decision 2.75m depth was finalized.



Fig. - Raft cost comparison



7. EXCAVATION


•SBC 200 T/m2

•Hard bed rock encountered at lower depth. No shoring was required

•Limited retaining wall size to 350 mm instead of heavy sizes



Fig. Bore Hole



Fig. Excavation


Fig.-Excavation section