Wu Wu Wu Wu ZhiZhiZhiZhi QiaoQiaoQiaoQiaoWu Wu Wu Wu ZhiZhiZhiZhi QiaoQiaoQiaoQiaoBridge Design Competition

1 DDDDESIGNESIGNESIGNESIGN CCCCONCEPTONCEPTONCEPTONCEPT 2 SSSSUSTAINABILITYUSTAINABILITYUSTAINABILITYUSTAINABILITY1 DDDDESIGNESIGNESIGNESIGN CCCCONCEPTONCEPTONCEPTONCEPT•Our team has adopted a scheme of bamboo arch withsuspended deck. Inspired by the swaying of bamboos duringbreeze, the single archwill have their two supports on differentsides of the deck. This is to mimic the ability of bamboos tosway inalldirectionsof its longitudinal axis.

2 SSSSUSTAINABILITYUSTAINABILITYUSTAINABILITYUSTAINABILITY•Locally available materials are used for the bridgeshoes for the arch are the only component thatspecial technology fromcontractor.However, thisassignment. Also, the shoes are not heavy andcarriedmanually. Installation requires a small drillingsway inalldirectionsof its longitudinal axis.

•Bridge deck is to be supported by two main longitudinalbeams. Each beam is made of two bamboos poles tiedtogether to increase the beam shear and bending capacities.Structural robes (nylon or organic) that can be found from thenearby townareusedtotie themaindeck to thearch.Bamboocross beams and bamboomat (interlaced bamboo strips) will

carriedmanually. Installation requires a small drillingthatcanbeeasily transported to thesitebyvillagers•Skills that exist amongst villagers (tying, splittingarerequired for thebridgeconstruction.•Treatedbamboocan last forabout10years.To10mm-diamter holeswill be introduced at the bottomsslots tochannel any rainwateraway.This is toensurecross beams and bamboomat (interlaced bamboo strips) will

complete thedecking.•Steel shoes of nine-hole slot will be used to support thebamboo arch. The base plate will be bolted to competentvolcanic rock on the river banks. The span of the bridge deckwill be increased to 22m to ensure that an allowance of about1mfromtheriverbank isachievable for thebaseplates.

slots tochannel any rainwateraway.This is toensurecomponents of the arch are dry throughout thehencedecompositionwill not takeplace.•Thedeck is above4.5mabove river bed.This isthe deck will not be washed away even whenlevel reaches itsmaximum.•With the new bridge, transportation of goods,1mfromtheriverbank isachievable for thebaseplates. •With the new bridge, transportation of goods,agricultural work and better access to the markethealthcarewill improve the livelihoodof thevillagers

Bamboo has been part of life of Mixia people. The villagers have been using the material

“have been using the material in the construction of houses, fences, water channels and even for the existing bridge. Our vision is to integrate this fascinating renewable

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fascinating renewable resource further into the people’s life and hence bamboo will be used in most of the structural components of the new bridge.

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new bridge.

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QWERTY Design Team

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USTAINABILITYUSTAINABILITYUSTAINABILITYUSTAINABILITY 3 BBBBAMBOOAMBOOAMBOOAMBOOTTTTREATMENTREATMENTREATMENTREATMENT

USTAINABILITYUSTAINABILITYUSTAINABILITYUSTAINABILITYbridge. Steelthat required

this is aone-offand can be

drillingmachine

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•As bamboo is susceptible topest attack, treatment is required.Fresh bamboo will besubmerged in water for about 6weeks. The river can be a gooddrillingmachine

villagers.splitting bamboos)

ensure this,bottoms of theensure thatall

weeks. The river can be a goodoption for the purpose astreatment instagnantwater tendstocreate foul smell andeffectivelypollute the water body. Theimmersion is to remove bamboonourishment that is attractive toensure thatall

the year andis the ensureriver water

goods, cattle for

nourishment that is attractive toinsects.•The bamboo is then air-dried foranother 6 weeks before beingusedfor theconstruction.

goods, cattle formarket and

villagers.

ConstructionMethod