Sun, Wind, Water, Earth, Life, Living: 3a traffic
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Transcript of Sun, Wind, Water, Earth, Life, Living: 3a traffic
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Sun wind water traffic earth life living, legends for design
AR2U070 Territory (design) 5ECTSAR0112 Civil engineering for dummies (calculations) 2ECTS
Prof.dr.ir. Taeke M. de JongProf.dr.ir. C. van den Akker
Ir. D. de BruinDrs. M.J. Moens
Prof.dr.ir. C.M. SteenbergenIr. M.W.M. van den Toorn
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Wet networks
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Distance between trenches
The necessary distance L between smallest ditches or drain pipes is determined by precipation q [m/24h], the maximally accepted height h [m] of ground water above drainage basis between drains and by soil characteristics. Soil is characterised by its permeability k [m/24h]. A simple formula is L=2√(2kh/q).
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Calculating the distance
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Wet network density by soil
d(k,N,h)=250√(2N/kh) km/km2
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Two networks
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Names of networks
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Nominal hierarchy wet connections
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Nominal hierarchy dry connections
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The formation of right angles
Length (L) and width (W) of the mesh for a given net density of (D=2)
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Superposition of networks
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Interference of networks
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Crossings
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Wet and dry crossings
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Rivers, canals and brooks
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Superposition races
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Interference with highways
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Interference highways and railways
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The same kind and level
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Limitating crossing movements
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T-crossings in Zoetermeer
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T-crossings in Meerzicht
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Crossings of the same kind and different level
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Tunnels and slopes
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Bridgesbased on pressure or on tension
arch bridge (boogbrug)approach ramp(aanbrugthrust (horizontale druk)deck (rijvloer)trussed arch with upper and lower chord (vakwerkboog boog met boven- en onderrrand)abutment (landhoofd)
beam bridge (balk- of liggerbrug)
abutment (landhoofd)overpass, underpass
(bovenkruising, onderdoorgang)deck (brugdek)
continuous beam (doorgaande ligger)
pier (pijler)parapet (leuning)
suspension bridge (hangbrug)anchorage block (ankerblok)
suspension cable (hangkabel)suspender (hanger)
deck (rijvloer)center span
(middenoverspanning)tower (toren)
side span (zijoverspanning)abutment (landhoofd)
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Bridges
trough arch bridge (boogbrug met laaggelegen rijvloer)
multiple span beam bridge (balk- of
liggerbrug met meer overspanningen)
fan cable stayed bridge (waaiertuibrug)
cable stay anchorage (tuiverankering)
based on pressure or on tension
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Bridges
half-through arch bridge (boogbrug met tussengelegen rijvloer)
viaduct harp cable stayed bridge (harptuibrug)
based on pressure or on tension
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Bridgesbased on pressure or
deck arch bridge (boogbrug met hooggelegen rijvloer)
cantilever bridge (kraagliggerbrug, cantileverbrug)
suspended span (zwevend brugdeel)
cantilever span (uitkragende
zijoverspanning)
transporter bridge
(zweefbrug)
trolley (wagen)
platform (platform)
on tension
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Bridgesbased on pressure or
fixed two-hinged three-hinged arch (ingeklemde, tweescharnier~, driescharnierboog)
single-leaf bascule bridge (enkele basculebrug)
counterweight (contragewicht
lift bridge (hefbrug)
guiding tower (heftoren)
lift span (val)
on tension
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Bridgesbased on pressure or
portal bridge (schoorbrug)
portal frame (portaal)
pier (pijler)
double-leaf bascule bridge
(dubbele basculebrug)
floating bridge (pontonbrug)
manrope (mantouw)
pontoon (ponton)
on tension
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Bridges
Bailey bridge (baileybrug)
swing bridge (draaibrug)
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Crossings of different kind and level
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Count your crossings (costs)
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Measures in traffic
Dispersion of real car widths in 2004;
95 percentile is 1.80m
Dispersion of the width of parking places in 1980; 95
percentile is 2.50m
Design measures are deduced from the dispersion of actual measures.Normally the 5% largest measures are left aside for design (95 percentile).
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A sidewalk tile as measure of reference
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Primary profile spaces needed
Pedestrian50 + 2 x 5 ≅
60 cm
Cyclist75 + 2 x 15 ≅
100 cm
Car 30 km/h200 + 2 x 15 ≅
230 cm
Bus 50 km/h 255 +2 x 25≅
300 cm
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A residential street
2.5 + 2 + 2.5 + 6 + 2.5 + 2 + 2.5 = 20m
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Road hierarchy
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Profiles
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A road hierarchy
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The urban area around Dordrecht
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Papendrecht detail
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A central Dordrecht detail
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Dordrecht some 350 years ago
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Managing surface
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30x30
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30x60 W-E mirroring
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60x30m N-S Turning and multiplying
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60x30m N-S mirroring
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60x30m elongating
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60x60m mirroring
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60x30m L-shape
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60x60m U-shape
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90x60m Closing
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Elongating and adapting 100x60m
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A neighbourhood, multiplying Fig. 16
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Saving pavement ensemble
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Saving pavement neighbourhood
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Saving pavement district
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District grids
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Cerda
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20, 30, 40, 50m
50
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Cerda (1867) and Buchanon (1963)
The same neigbourhood size
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Buchanan (1963)
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Buchanan (1963)
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Buchanan (1963)
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Buchanan (1963)A hexagonal pattern (Figure 12) is very efficient, with economical three-way intersections, but other polygonal patterns are possible. A rectangular pattern requires very complex intersections.…The function of the distributory network is to canalize the longer movements from locality to locality. …This means that they cannot also be used for giving direct access to buildings, or even to minor roads serving the buildings, because the consequent frequent junctions would be dangerous and make the road inefficient.
It is therefore necessary to introduce the idea of a 'hierarchy' of distributors, whereby important distributors feed down through distributors of lesser category to the minor roads which give access to the buildings [13].
The system may be likened to the trunk, limbs, branches, and finally the twigs (corresponding to the access roads) of a tree. Basically, however, there are only two kinds of road - distributors designed for movement, and access roads to serve the buildings.
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Grid flexibility (Bach)
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Grid flexibility (Bach)
Dutch appointments ‘Duurzaam Veilig’
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Regional networks
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Network types
1km 3km 10km 300m-10km
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Care for pedestrians is the core of urban design
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Pedestrians
Runcorn: Pedestrian first Reichow: car first
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Pedestrians in residential area
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Radials for pedestrians and cyclists
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Railway stations
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Bus stations
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Bus routes
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Bach’s bus stop
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Bus stops