Construction Scheduling BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 Q - PowerPoint PPT Presentation

O brajes b ridge tO M arket D uke u niversiTy P raTT s chool of e ngineering D eParTmenT of c ivil anD e nvironmenTal e ngineering c ivil e ngineering 142 s Pring 2009 D esign T eam : T homas B urklanD m aria g iBBs r ussell g lorioso T homas h aDzor

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 e xisTing c onDiTions

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 s iTe Project Site

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 D esign a lTernaTives Floating Bridge Utilizing the bouyant force of water, this bridge would respond to a fmooded river by simply rising on it. Inspired by pontoon boats, and potentially recycling oil drums, this bridge would be simple to maintain, if not to cross. Major concerns about durability, safety, and reliability shelved this untested concept.

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 D esign a lTernaTives Culvert Bridge The culvert bridge is a standard rural design. It is durable, easily crossed, and relatively simple to construct. Large round pipes - culverts - allow water to fmow through, leaving the bridge nearly untouched. Major drawbacks are the uncertainty of availability of appropriate culverts, or the manpower needed to construct such a bridge.

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 D esign a lTernaTives Hardened Roadway The simplest option by far, the hardened roadway is little more than a slab on grade. It is easy to build and maintain and potentially extremely durable. However, in times of fmooding, this solution becomes impassable. In the times of high water that make this bridge project necessary, this option will be unusable. While it would become passable faster than mud could dry, the signifjcant problem of fmooding makes this option less than optimal.

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 D esign D ecision We utilized a spreadsheet of values, scoring each bridge out of ten for eight useful categories. Our results indicated that the culvert design was the best option, so we moved forward with a design for a culvert bridge.

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 P lans A B C D E F 5' - 0" 2' - 9" 1' - 8" 5' - 0" 4 4' - 0" 3 4' - 0" 2 4' - 0" 1 1' - 0" 20' - 0" 20' - 0" 20' - 0" 20' - 0" 20' - 0" 01 - FOUNDATION 2 1/4" = 1'-0" A B C D E F 12' - 0" 4 3 2 1 02 - BANKS 3 1/4" = 1'-0" A B C D E F 12' - 0" 12' - 0" 14 x 25 14 x 25 14 x 25 14 x 25 14 x 25 4 14 x 25 14 x 25 14 x 25 14 x 25 14 x 25 3 10 x 20 10 x 20 10 x 20 10 x 20 10 x 20 10 x 20 12' - 0" 12' - 0" 14 x 25 14 x 25 14 x 25 14 x 25 14 x 25 2 14 x 25 14 x 25 14 x 25 14 x 25 14 x 25 1 03 - DECK 1 1/4" = 1'-0"

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 e levaTions 1 2 3 4 4 3 2 1 03 - DECK 03 - DECK 1' - 6" 1' - 6" 02 - BANKS 02 - BANKS 0' - 0" 0' - 0" 01 - FOUNDATION 01 - FOUNDATION -7' - 0" -7' - 0" EAST ELEVATION WEST ELEVATION 1 2 1/4" = 1'-0" 1/4" = 1'-0" F E D C B A 03 - DECK 1' - 6" 02 - BANKS 0' - 0" THIS AREA TO BE THIS AREA TO BE FILLED IN WITH SOIL FILLED IN WITH SOIL 01 - FOUNDATION -7' - 0" NORTH ELEVATION 3 1/4" = 1'-0" A B C D E F 03 - DECK 1' - 6" 02 - BANKS 0' - 0" THIS AREA TO BE THIS AREA TO BE FILLED IN WITH SOIL FILLED IN WITH SOIL 01 - FOUNDATION -7' - 0" SOUTH ELEVATION 4 1/4" = 1'-0"

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 c onnecTions 0' - 10" 1 ' - 8 " 2 LONGITUDINAL #8 BARS 0' - 2" 0' - 2" 1 ' - 0 " #3 TIES @ 1'-0" O.C. #3 TIES @ 1'-0" O.C. 4 #8 BARS 1 ' - 0 " 4 #8 BARS 1 ' - 0 " 5 #4 BARS @ 14" O.C. 01 - COLUMN INTO PRIMARY BEAM 02 - COLUMN INTO FOOTING 1 2 3" = 1'-0" 3" = 1'-0"

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 r eBar P lan COLUMN BARS BEND AND EXTEND ALONG PRIMARY BEAM 0 ' - 2 1 / 2 " 0 ' 1 - ' - 1 2 5 " / 8 " 0 ' - 2 1 / 2 " 1 ' - 0 " 4 LONGITUDINAL #8 BARS IN EACH SECONDARY BEAM 0' - 3 1/2" 0' - 3 1/2" 2 LONGITUDINAL #8 BARS IN PRIMARY BEAM 2 ' - 9 " 2 #8 BARS EXTEND INTO BOTH 1 SECONDARY AND PRIMARY BEAMS ' - THE DEVELOPEMENT LENGTH 0 " 1 ' - 2 " 03 - REBAR PLAN VIEW 1 3" = 1'-0"

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 D eTails 04 - PRIMARY AND SECONDARY BEAMS 1 3" = 1'-0" A 03 - DECK 1' - 6" 02 - BANKS 0' - 0" 2 #8 BARS 7' - 0" 2' - 9" 1' - 8" 2 #8 BARS 01 - FOUNDATION 0' - 3" -7' - 0" 1' - 0" 1' - 0" 05 - RETAINING WALL 2 3/4" = 1'-0"

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 P racTical c onsiDeraTions c ourTesy of W ooDy k loesel , Pe Optimal water/cement ratio ≤ 0.55 Reinforcing steel: F y = 40 ksi Concrete: f c ’ = 2500 psi (EWB recommended for site-mixed) Allowable soil bearing pressure: 2000 psf Suggested Rho value: ρ= 0.0045

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 f inal D esign Deck 0.6C24 Deck 2.5” Deep WWF= 6x6 W2.1 x W2.1 (As=0.042) Major materials used Primary Beam Concrete : 1846 ft 3 10 x 20 with 2-#8 bars Tops each of the four sets of columns and the retaining wall. Metal Decking : 1200 ft 2 Secondary Beam WWF : 12 csf 14 x 25 with 4-#8 bars #3 bars : 140 ft Runs with the fmow of traffjc, @ 4’ O.C. #4 bars : 400 ft Column 10 x 12 reinforced concrete #8 bars : 2259 ft 4 #8 bars with #3 ties @ 1’-0” O.C. Spread Footing 60 x 60 x 8 5 #4 bars @ 1’-2” O.C. in each direction

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 c oncreTe m ix D esign Goals: water/cement ratio ≤ 0.55 concrete f c ’ ≥ 2500 psi Concrete Mix: Water: 0.5 lb/ft 3 Cement: 25.38 lb/ft 3 Coarse Aggregate: 73.89 lb/ft 3 Fine Aggregate: 48.9 lb/ft 3

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 f orm D esign NOTE: Each design is for one of the objects it specifjes Footing : 4 - 1” x 8” timbers; two cut at 5’-2”, two cut at 5’-0” Column : 4 - 1” x 12” timbers; cut at 6’-5” Primary Beam : 5 - 1/2” plywood; one cut to 12’-0” x 11”, two cut to 11’-11” x 20”, two cut to 11” x 20” Secondary Beam : 5 - 1/2” plywood; one cut to 12’-0” x 15”, two cut to 1’-3” x 2’-1”, two cut to 19’-11” x 2’-1” Ramp : 4 - 1” x 4” timbers; two cut to 12’-0”, two cut to 12’-2” Retaining Wall Slab : 4 - 1” x 12” timbers; two cut to 5’-5”; two cut to 12’-2” Retaining Wall : 4 - 1/2” plywood; two cut to 6’-5” x 1’-2”, two cut to 6’-5” x 12’-0”

BOLIVIAN BRIDGE DESIGN CE 142 S PRING 2009 C OS T E S TIMATION Materials List 1 U.S. dollar = 7.02000702 Bolivian bolivianos Item Amount per Element Units Multiply by 1.25 Convert to m# of 12m bars # of Elements Cost(BOB) Units Cost (USD) Cost Spread Footing 8 concrete 16.7 cf rebar (8 #4 bars)12.7mm 400 ft 500 152.4 13 135.71 per 12 m bar $19.34 Column 8 concrete rebar (6 #3 bars)9.525mm 140 ft 173.6 52.91328 5 85.26 per 12m bar $12.15 Primary Beam 6 concrete rebar (2 #8 bars) 2259 ft 2823.75 860.679 72 604.55 per 12m bar $86.14 Secondary Beam 20 concrete rebar (4 #8 bars)28.65mm 0 ft 0 0 0 604.55 per 12m bar $86.14 Retaining Wall 2 concrete rebar (2 #8 bars) 1 ft 1.25 0.381 1 604.55 per 12m bar $86.14 $172.28 Welded Wire Fabric 12 csf Deck concrete metal decking 1200 sf 1 15.94 sf $2.27 anchor bolts Form Work plywood $1,000 lumber (i.e. 2 x 4) $1,000 nails (clavos) 1000 18/kg(.35/nail) $0.05 $50.00 Total # 8 re-bar 2259 ft 2823.75 860.679 72 604.55 per 12m bar $86.14 $6,202.08 #4 re-bar 400 ft 500 152.4 13 135.71 per 12m bar $19.34 $251.42 # 3 re-bar 140 ft 175 53.34 5 8.26 per 12m bar $12.15 $60.75 Concrete 1846 ft $8,452 Metal Decking 1200 sf 15.94 sf $2.27 $2,724.00 Welded Wire Fabric 12 csf 15.16 csf $2.16 $25.92 Concrete 1846 cf Portland Cement 23.33 lb/cf Coarse Aggregate(Gravel) 73.89 lb/cf Fine Aggregate (Sand) 48.9 lb/cf Water Welded Wire Mesh 347.49/cfs $49.50 Misc. Materials Trowels(paleta, badilejo) 5 18 $2.56 $12.80 Shovels(pala) 10 85 $12.11 $121.10 Wheelbarrows 5 600 $85.49 $427.45 Concrete Mixer 2 $1,000 $1,000 Stakes 200 1.75 $0.25 $50.00 Tape Measures 5 28 $4.00 $20.00 Levels (nivel) 5 17 $2.42 $12.10 Spray Paint 20 35 $5 $100 Surveying Equipment *brought from Duke $0 $0 Helmets(cascos) 20 30 $0.27 $5.40 Gloves(guantes de cuero) 20 20 $2.85 $57.00 Breathing Masks 10 10 $1.42 $14.20 Safety Glasses(gafas) 10 15 $2.14 $21.40 Wood Saws 10 40 $5.70 $57.00 Hammars (martillo) 10 45 $6.41 $64.10 Total Cost $21,728.72 English Spanish rebar Acero Corrugado

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 Construction Scheduling

BOLIVIAN BRIDGE DESIGN CE 142 S pring 2009 Q uesTions ?