M27BE: Bridge Engineering Assignment

Added on - Apr 2020

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Running Head: AQUEDUCT DESIGNAQUEDUCT DESIGNStudent’s Name:Institutional Affiliation:
AQUEDUCT DESIGN2REFERENCEDESCRIPTIONOUTPUT
AQUEDUCT DESIGN3The choice of aqueduct system. The two aqueducts of choice are the trough andthe barrel type aqueduct. However, some of the specifications in their design arecompletely different and as such, require individual focus[ CITATION Bos76 \l 1033 ].The following design basically focuses on the barrel type aqueduct.The three principal loadings are from:The self-weightThe loading by the emergency vehiclesLoading by the water(during operation of the canalBeginning with the stresses that are induced on the slab(taking a troughaqueduct)The self-weight properties of the slab and the troughThe stress that is induced by the concrete=352/Nmm0.0980665=3.43232752/kgcmThe stress induced by the steel=22450 /0.098665 /Nmmkgcm=44.1299252/kgcmThe concrete mix basically determines various parameters of the structuralelement and in this case, a C35 concrete mix is taken for the design purposeThe density of water is 10003/kgmand designing the elements per meterrun the stress induced is 10002/kgmThe size of the trough is given as 4.0m
AQUEDUCT DESIGN4BS 8110-1:1997Table 3.3The trough propertiesThe maximum depth that water is limited to flow is 1.8 meters. It is animportant aspect of the design because of the thrust that the trough and slab aresubjected to. The freeboard of the water of 0.5 meters prevents the water fromcausing considerable damage to the traffic and the footpath.16mm S355 diameter bar is taken as the main reinforcing bar for our designpurpose. The 16mm diameter is appropriate because it is the most viableamong the three grades of steel. Though it does not possess the samecharacteristic strength as the S460 bars, it presents a comparatively cheaperoption.Taking the cover of the slab as 35 due to moderate exposureThereore,assuming a slab thickness of 230mmEffective depth of the slab=230-35-8=187mmAnd the effective span of the trough=the span effective depth4+0.187=4.187mThis results into a self-weight of (2500kg/m2 is the unit weight of reinforcedconcrete)0.230 2500 575 / /kgmmrunDesigning the wing walls of the troughThe total height of the wingwall,which may be simply supported between thewuingwall and the pier=1.8+0.5+0.230=2.52 mFurthermore, the wing wall may be described to span between the abutmentand a pier that may be located midway through the total span that is 34 m. The16mm diameterS355Cover =35mm
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