Box culverts

barrel box culvert ppt by sunil choudhsary g

1. GOVT. ENGINEERING COLLEGE, BANSWARA Submitted By:- Bhavik Trivedi, Sanjay Patidar , Sunil Meel , Manish Khatva PRESENTATION ON PRACTICAL TRAINING Submitted To:- (Department of Civil Engineering)

2. North Western Railway Banswara,Udaipur,Dungarpur (Construction of Box Culvert) 2

3. Contents Objective of Summer Training Project Details Introduction of Box Culvert Components of Box Culvert Materials Used In Construction Equipments Laboratory Tests Concrete Mix Design Layout of Construction Execution of Construction Loads Considered for culvert design

4. Object Of Summer Training Application of knowledge and techniques learnt in the classroom to real field problems and to test out and enrich one’s understanding, knowledge and skills. Gives an insight into the working of the real sites. Gaining deeper understanding in specific functional areas. Appreciating the linkages among different functions. Helps in exploring career opportunities in their areas of interest.

5. Introduction of Project The project of Ratlam dungarpur railway line via Banswara was sanctioned in 2011. 176-km-long railway line out of which 126 km would be in Rajasthan while 50 would be in Madhya Pradesh. The estimated cost of the new line, to be completed in five years, is Rs 2,083 crore . The Railway Board and the state government will bear 50% each of the project cost, while the land cost, including acquired land compensation, would be borne by the state government. The state government's move to allot Rs 1,200 crore for the project as its share.

6. BOX CULVERT BRIDGES A bridge is a structure having a total length above 6m between the inner face of the dirt. Classified as: Minor Bridges – Span greater than 6m upto 60m Major Bridges – Span greater than 60m CULVERT A culvert is a cross-drainage structure having a total length of 6m or less between the inner The types of culverts are: Box Culvert Pipe Culvert RCC Solid Slab Culvert

7. Components of Box Culverts Bottom Slab Vertical walls Deck Slab Haunch Wing Wall Return Wall Drop Wall Curtain wall Earth Retainer

8. Materials Used In Construcion Cement (OPC 43 grade) Coarse aggregate (20mm) Fine aggregate(sand) Super plasticizer Steel ( fe 500, rubbed bars,TMT ) Shuttering ( couplar,box channel)

9. Transit Mixer(Miller) : 6 m3 capacity Boom Placer Hydraulic Excavator Auto level Batching Plant (Mechanically operated) Needle Vibrator Equipment Used :

10. Laboratory Tests: Compressive Strength Test Aggregate : 1. Impact value 2. Crushing value 3. Los angles 4. Pycnometer test Sand : Sieve Anaylysis liquid limit Specific gravity indicates amount of water that an sample can absorb in its pore structure.(2.5-3)

11. Field Test : Slump cone test : 150mm slump Layout of any culvert using Auto Level. Chainage : It is distance travelled along a survey line starting from a fixed commenced point. Building of Dungarpur Railway Station is starting point i.e. chainage is 0 at dungarpur railway station. Slope is provided at layout time by fixing center chainage of culvert.

12. Concrete Mix Design : IS 10262 : 2009 M35 concrete is to be designed. Slump required- 125mm-150mm Admixture : Super –Plasticizer Crushed Angular Aggregate W/C ratio :0.4 NOTE : For getting desired slump content of admixture can’t be increased we have to redesign concrete in that case.

13. PLAIN CEMENT CONCRETE

14. Layout of Construction For establishing location of any bridge we are given center line chainage of the given bridge. Now from Gps survey we can determine the center point location. For providing better drainage slope of 1 in 100 is provided but slope is provided before construction of superstructure. By turning Autolevel through various angles we can plot layout of our bridge. Dimension of all the components of bridge is decided from the data given by R.D.S.O. Department. According of different fill height.

15. Basics of Bar Bending Schedule.  Cutting Length : It is the length reduced at the bends of 90 degree and 45 degree. For 90 degree- 2d For 45 degree – 1d No. of bars (+1) In the wing wall length of each bar is different and is calculated by considering slope of wall.(curtailment Chairs, Key, Shear link up bars. Cover (50mm)

16. Execution of construction: 200mm thick sand layer. 150mm thick pcc base course (M20). Survey after sand and p.c.c layer also to check bed slope. Pouring of concrete not with a height greater than 1.5 m Shuttering load(450mm) 150mm thick boulder outside bridge. Range of vibrator 150mm thick wearing course at bed level.

17. Burms Filling slope Compaction after every 400mm layer of filling Core cutter test to check dry density after each layer. Railway curve (design) Cutting by explosions Earth filling :

18. burms

19. cutting

20. curve

21. Structural Analysis Loads considered are : Dead loads Live loads Dynamic effects Seismic force Earth pressure Surcharge pressure By moment distribution method we can analyze. Loading is calculated by considering 25t loading IRS 2008

22. References : Bridge codes : 1785 part 1 1785 part 2 1786 IRS standard 2008 IRS Bridge Substructure and foundation Code IRS bridge rules Concrete Mix design 10262: 2009 Mr. Dhanraj Potter ( J.En . , NWR Banswara ) Mr. Parmindar Singh Rathor ( A.En ., NWR Banswara ) Mr. Anil Tiwari (Site Engineer, GDCL) Department of Civil Engineering, GEC Banswara

23. Civil Enginners

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