Revised Final Report Bakraha
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Transcript of Revised Final Report Bakraha
CHAPTER VI : DETAILED DESIGN OF BRIDGE
SALIENT FEATURES OF THE PROJECT
Name of the Project : Detailed Engineering Survey and Design of Bakaha River Bridge in Morang District
Development RegionEastern Development Region
ZoneKoshi
DistrictMorang
Geographical Location :
Easting863493.08770 (Latitude - 2644'31")
Northing2963704.8578(Longitude- 8739'12")
Classification of the RoadDistrict Road
Type of the road surfaceGravel Road
Terrain / GeologyTerai
Information on structure:
Total length of the bridge186.8 m
Span arrangement5x 35m
Total width of the bridge:11 m
Width of:
Carriageway:7.5 m
Footpath(s)/ Kerbs:1.75 m
Report on Detailed Engineering Survey and Design of Bridge over Bakaha River at Morang
CONTENTSCHAPTER I: BACKGROUND11.1Introduction11.2Objective and scope of works11.3Location of the Bridge11.4Methodology of work21.4.1General21.4.2Desk study21.4.3Field works31.4.4Design works3CHAPTER II: ENGINEERING SURVEY4CHAPTER III: GEOLOGICAL INVESTIGATIONS53.1Geomorphology53.1.1Bhabar53.1.2Middle Terai53.1.3Southern Terai53.2Geology of the Area5CHAPTER IV: SOIL INVESTIGATION64.1Introduction64.2Scope of the Work64.3Field Works64.3.1In-situ tests64.3.2Sampling64.4Laboratory Tests64.5Evaluation of Safe Bearing Capacity74.5.1Calculation of Bearing Capacity7Open Foundation7CHAPTER V: HYDROLOGICAL STUDY95.1General Introduction95.2Rainfall Analysis105.3Flood Flows105.3.1Water and Energy Commission Secretariat (WECS) Approach105.3.2Dicken's Method115.3.3Snyder's Method115.3.4B.D.Richards Method125.3.5Design Flood Flows125.4HFL Calculation135.5Scour Depth13CHAPTER VI: DETAILED DESIGN OF BRIDGE176.1Selection of Bridge type176.2Design of Bridge176.2.1Loading Standard176.2.2Design176.3Other Details206.3.1Kerb206.3.2Railing206.3.3Expansion Joints206.3.4Surface Drainage216.3.5Protective Works for Abutments21CHAPTER VII : QUANTITY AND COST ESTIMATES227.1Quantity Estimates227.1.1Site Clearance227.1.2Earthworks227.1.3Backfilling227.1.4Reinforced Concrete Works227.2Rates and Prices237.2.1Materials and Wage Rates237.2.2Locally Produced Materials237.2.3Imported Materials237.3Rate Analysis and Item Rates237.4Construction Costs23CHAPTER VIII: ENVIRONMENT PROTECTION24CHAPTER IX : MAINTENANCE OF BRIDGE AND RELATED WORKS25REFERENCES26ANNEXESAnnex I:Detailed Cost Estimate