602796956-Case-Study-on-Demolition-of-Maradu-Flat.pptx

ppt on marudu demolition

1. CASE STUDY ON DEMOLITION OF MARADU FLAT Guided by , Mr. Lins Paul Kuriakose Asst. Professor Department of Civil Engineering Presented by , Sandra Maria Siby S 7 Civil Engineering B Batch Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology

2. INTRODUCTION Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 1 Case Study on Demolition of Maradu Flat

3. BUILDINGS SET FOR DEMOLITION Alfa Serene, Nettoor Holy Faith H20,
Kundannoor Golden Kayaloram , Kannadikadu Jain Coral Cove, Nettoor Constructed by Alfa Ventures Private Ltd Holy Faith Builders & Developers K P Varkey & Builders Jain Housing & Constructions Managing Director Paul Raj Sany Francis K V Jose Sandeep Malik Explosion to be carried out on Ground floor, 1 st ,2 nd , 5 th , 7 th , 9 th , 11 th and 14 th floors. Lower,Upperground 2 nd , 4 th , 7 th , 10 th , 13 th and 15 th floors. Ground floor, 1 st , 2 nd and 7 th floors. Ground floor, Upper ground 1 st ,5 th ,8 th ,11 th and 14 th floors. Demolition date January 11, Time : 11.30am January 11, Time:11 am January 12, Time:2pm January 12, Time: 11am Demolition company Vijay Steels and Explosives(Chennai) Edifice Engineering (Mumbai) Edifice Engineering (Mumbai) Edifice Engineering (Mumbai) Cost Rs 61,00,000 Rs 64,02,240 Rs 21,02,720 Rs 86,76,720 Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 2

4. Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 3 Source : https://. manoramaonline.com / Jain Coral Cove, Nettoor Golden Kayaloram, Kannadikadu Holy Faith H20, Kundannoor Alfa Serene, Nettoor

5. REASON FOR DEMOLITION VIOLATION OF COASTAL REGULATION ZONE (CRZ) NOTIFICATION -1991 Built along the coastal region that falls under the CRZ-III category Constructions not allowed within 200 metres from the coastline. Total area covered - shall not exceed 9 meters Construction - not more than 2 floors (ground floor plus one floor). Construction of hotels/beach resorts - permitted Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 4

6. Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 5

7. DEMOLITION USING IMPLOSION Min. Amount of explosives Min. Structural preparation expense Controlled collapse Collapses straight down into building footprint Removes critical support-fall under the force of gravity Explode major support columns on lower floors Common explosives used: Dynamites, water gels, emulsions, PETN, RDX, etc. Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 6

8. PRINCIPLE OF IMPLOSION firing of precisely placed demolition charges gravity - cause center of the building to fall vertically simultaneously pull the sides inward Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 7 Fig 1: Demolition Using Implosion Source: https://amazonaws.com/

9. LITERATURE REVIEW Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 8

10. AUTHOR PAPER YEAR DESCRIPTION V T Padmanabhan Demolition of buildings violating Coastal Regulation Zone (CRZ) notifications in Kerala, India January 2020 Criticising the government for the implementation of a judicial order with low level planning in modern times. Graeme Mckenzie, Bijan Samali, Chunwei Zhang Design criteria for a Controlled Demolition (Implosion) January 2019 Demolition by implosion, several conditions to be addressed prior to a demolition and the need for implosion demolition in Australia. Kanchan Devkota Story Building implosion and collapse: Effects on Adjacent structures May, 2019 Structural response and interaction during implosion and progressive collapse of multi storey structures. Dr.Venkata Krishnaiah, P. Dayakar, K. Venkatraman Methods of Safety management during Building Demolition – An Overview 2018 Selection of right method of demolition, safety of workers, occupants and environment. Ankit Wankhede, Tushar Warade, Akshay Patil Demolition of Buildings by Implosion April 2017 Demolition technology practiced to demolish the concrete structures in a controlled way especially in Indian conditions. Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 9

11. METHODOLOGY Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 10

12. PRE-PLANNING OF DEMOLITION ACTIVITY Surveying of site Building Surveying ● inspection of building plan ●Site study Structural Surveying ●Structural details Preparation of plan for Demolition work Building Location Topography of the site- Contours and slopes Details of ground removal and backfilling Removal of hazardous materials Asbestos containing materials Petroleum and radioactive contamination Powered mechanical plants-structural calculations fir temporary supports and bracings Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 11

13. STABILITY REPORT Report on stability of building Report on stability of adjacent buildings Powered mechanical plants-structural calculations for temporary supports and bracings Calculations demonstrating-demolition will not cause damage to any adjacent buildings Structural calculations for temporary and permanent supports Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 12

14. Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 13 Fig 2 : Draft Stability Report Source: https://img.yumpu.com/

15. SAFETY MEASURES Training and Communication Equipment maintenance Electrical Safety Fire Occupational Health Emergency Exit Requirements in Demolition Sites Vibration Environmental Precautions: Air Pollution, Water, Noise, Hazardous materials Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 14

16. PREPARATIONS FOR IMPLOSION DEMOLITION PRE WEAKENING Removal of : (a) non-load bearing walls (b) fixtures and fittings (c) mechanical equipment       (d)  plumbing and piping (e) stairways and facades Cutting and exposing of circular or rectangular steel stirrups, spirals etc. Removal of concrete matrix of shear wall Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 15 Fig 3: Pre-weakening of the Structure Source: https://static.toiimg.com/

17. STEPS IN IMPLOSION DEMOLITION 2. DRILLING FOR EXPLOSIVES PLACEMENT Drilling of columns Stemming – sand or high density foam 3. PLACEMENT OF EXPLOSIVES CHARGE Water gel and emulsion explosives : VOD = 4000m/s, used as main explosives ANFO : VOD = 3600m/s, used as electrical detonators PETN : VOD = 3500m/s, used in detonating chord RDX : VOD = 8750m/s, used for steel cutting charges Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 16

18. Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 17 Fig 4: Placement of Explosive Charges Source : http://www.buildingdemolition.co.in/

19. PREPARATIONS FOR IMPLOSION DEMOLITION Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology 4. EXPLOSIVE BLAST DESIGN FORMULA FOR USE IN CONTROLLED IMPLOSION SAVYTSKYI,NIKIFOROVA AND GROSMAN FORMULA M = R 3 ac where: M = Explosive charge (kg TNT) R = Effective radius (m) a = Tamping factor (4.5 for an untamped charge) c = Resistance factor depending on R a <=1.5 m <=2.0 m <=3.5 m >3.5 m c 6 5 4 4 Page No. 18 Table 1: Blast Design Formula Resistance factor Values Source: https://www.researchgate.net/publication/

20. STEPS IN IMPLOSION DEMOLITION 5 . PLACEMENT OF SEISMOMETERS Magnitude Typical Maximum Modified Mercalli Intensity 1.0 – 3.0 I 3.0 – 3.9 II - III 4.0 – 4.9 IV - V 5.0 – 5.9 VI - VII 6.0 – 6.9 VII - IX 7.0 and higher VIII or higher Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 19 Table 2: Typical Maximum Modified Mercalli Intensity Source: https://www.researchgate.net/publication/

21. STEPS IN IMPLOSION DEMOLITION 7 .    COLLAPSE FOOTPRINT Connected using steel wire rope Determined by the trajectory of the fall of the building Front row columns tied to rear columns Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 20 6. PLACE CONTAINMENT FRAGMENTATION BARRIERS Wrapping and Barriers -steel mesh, polymer, geo-fabric materials, shipping containers, bales of hay, earthen mounds etc. Fig 5: Wrapping up of columns in steel mesh and polymer or geo-fabric Source : http://www.buildingdemolition.co.in/

22. Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 21 Fig 6: Place Containment Fragmentation Barriers Source: https://english.mathrubhumi.com/

23. STEPS IN IMPLOSION DEMOLITION 8 .    COLLAPSE DETONATION TIMIMG SEQUENCE Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 22 t = √(2d/g) Where t is the time of fall distance in seconds d is the fall distance in metres g is the acceleration due to gravity equal to 9.81 m/s 2 FLOOR d(m) 2d/g √( 2d/g) = t(sec) v(m/s) 6th 18 3.669 1.915 18.79 5th 15 3.058 1.748 17.15 4th 12 2.446 1.563 15.34 3rd 9 1.834 1.354 13.28 2nd 6 1.223 1.105 10.84 1st 3 0.611 0.781 7.67 GROUND Table 3:Kinematic Parameters for a Building Collapse Source: https://www.researchgate.net/publication/

24. DESIGN CRITERIA Min. charge weight (kg) of explosives Removal of structural elements –facilitate collapse Control of spread of cementitious dust cloud Min. ground vibrations Designation of design footprint Design for debris pile Designation of suitable safety distances Min. fragmentation Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 23

25. IMPLOSION DEMOLITION DESIGN PROCESS FLOWCHART Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 24 Fig 7:Implosion Demolition Design Process Flowchart Source: https://www.researchgate.net/

26. DETAILS OF EXPLOSION Alfa Serene, Nettoor Holy Faith H20,
Kundannoor Golden Kayaloram, Kannadikadu Jain Coral Cove, Nettoor No of Floors 16 19 15 17 Explosives (kg) 300 400 200 700 Debris (tons) 21400 21450 7100 26400 No of Holes 3500 1540 960 2860 Angle of collapse Into the space between the two towers 36° towards the side of bridge Smaller part towards Thaikkudam bridge, Larger part towards the opposite side Towards the eastern side Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 25

27. Packaged emulsion explosive Robust, high strength, and detonator sensitive. A firm putty-like consistency. Products are sensitized through chemical gassing / micro-spheres / combination of both. It is a water resistant packaged explosive. Designed for priming applications and as a column explosive in surface and underground mining and general blasting. High detonation velocity of 3.5 km/sec. DETAILS OF EXPLOSIVES Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Superpower 90 (Solar Mining Services Ltd.) Page No. 26 Fig 8: Superpower 90 Explosive Source : http://www.buildingdemolition.co.in/

28. VIBRATIONS DURING DEMOLITION Classification of building damages caused due to Vibration: Threshold damage – Hairline cracks,no impact on structural integrity Minor damage – visible to naked eye,can be repaired Major damage - Earthquake level vibration,structural damage MMI Seismic Intensity Scale Modified Mercalli Intensity (MMI) scale Measures- intensity and effects of earthquakes Implosion demolition has two sources of vibration: (a) The implosion (b) The fall of debris Case Study on Demolition of Maradu Flat Page No. 27

29. DAMAGES TO BUILDINGS Case Study on Demolition of Maradu Flat Page No. 28 Fig 9: Crack Appeared On Walls And Stairway Of Adjacent Houses Source: https :// www.thenewsminute.com /

30. VIBRATIONS DURING DEMOLITION MARADU FLAT DEMOLITION “ MMI SCALE VI ” Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 29 Fig 10: The Modified Mercalli Intensity Scale Source : https://prd-wret.s3.us-west-2.amazonaws.com/

31. REMOVAL OF DEBRIS PILE Rubble and the steel rods removed from the sites. Concrete piles and the pile caps of the buildings, still remain underground waiting for nature to destroy The task of removing concrete - Muvattupuzha based company Prompt Enterprises Pvt Ltd. Case Study on Demolition of Maradu Flat Page No. 30

32. DEBRIS ACCUMULATED Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 31 Fig 11: Debris After The Demolition Source: https://img.onmanorama.com/

33. CHALLENGES FACED DURING DEMOLITION AND SOLUTIONS Dust factor Debris Development of cracks Tremors Created on earth SOLUTIONS: Spraying water from fire force engines Geomats and tarpaulins Technical assurance Emulsion explosive materials Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 32

34. ADVANTAGES OF IMPLOSION DEMOLITION LESS EXPENSIVE: the explosive cost only Rs2400/box of 125 cartridges LESS TIME CONSUMING: it took only an average of 5.6 sec for the complete fall down of the building SAFE: if necessary precautions are taken Blasters minimize flying debris Reducing the likelihood of damaging nearby structures actual noise and ground vibration created will be well below levels of concern surrounding communities will experience little or no impact during implosion Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 33

35. DISADVANTAGES OF IMPLOSION DEMOLITION Need of Experienced hands: A small carelessness will lead to huge damage Large pieces of debris might project towards spectators away Air pollution is higher than with other methods Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 34

36. CONCLUSION Implosion - most impressive method of demolishing Success of the Kochi demolitions Structures with more than 10 floors, time constraint Neighbouring constructions were relatively new, engineered buildings Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 35 Fig 12: Air Pollution During Implosion Demolition Source: https://www.thehindu.com/

37. REFERENCES Case Study on Demolition of Maradu Flat Dept. of Civil Engineering, Viswajyothi College of Engg. & Technology Page No. 36 [1] VT PADMANABHAN (2020): ’Report On Demolition Of Buildings Violating Coastal Regulation Zone (CRZ) Notifications In Kerala, India’, January 2020. [2] Graeme Mckenzie, Bijan Samali, Chunwei Zhang (2019):’Design Criteria for a Controlled Demolition (Implosion)’ International Journal of GEOMATE,Japan , Vol.16, Issue 53, pp.101-112 Geotec ., Const. Mat. & Env ., DOI: https://doi.org/10.21660/2019.53.90374 ISSN: 2186-2982 (Print), 2186-2990 (Online), January 2019. [3] Ankit Wankhede, Tushar Warade, Akshay Patil (2017): ‘Demolition Of Buildings By Implosion’ 7 th International Conference on Recent Trends in Engineering, Science and Management [Online], Available www.conferenceworld.in , April 2017. [4] Dr.Venkata Krishnaiah, P. Dayakar, K. Venkatraman (2018):’Methods Of Safety Management During Building Demolition- An Overview’, International Journal of Pure and Applied Mathematics, Volume 119, No. 12, 2018