roro presentation Final V2.pptx
Post on 02-Oct-2015
Development of a new Roll-on/Roll-off Ferry Terminal
Group HDevelopment of a new Roll-on/Roll-off Ferry TerminalIntroduction
Ro Ro TerminalSite overview
GeologySection A-A shows that it is mainly dense sands interspersed with gravel.
Section B-B is clays with peaty deposits.1 - The constitution of the dredged materials is not an unknown, the cross section is mainly concerned with unknown soils/strata etc.3 - The soft clay and peat may cause issues as peat has a high compressibility. 3
Cross section A-A
Cross section B-B TopographyThe current site is being surcharged by dredged materials taken from the riverbed during the reclamation phase.
Beneath the reclaimed land the riverbed has a shallow gradient that becomes steeper as it approaches the centre of the river.
1 - this phase consisted of establishing a bund of coarse materials and then filling the space behind the bund with materials that were dredged from the Thames estuary out to the North Sea.2 - It has been assumed that the area in which the Ro-Ro will be situated will be filled in prior to the start of works 6Soil variation post reclamationGround improvement solutions Install PVDs (Prefabricated Vertical Drains) prior to works- suitable for soft clay and with existing preloading.
Vibro compaction, to improve the bearing and densifies capacity of weak soil.
Images from: http://www.docstoc.comTo shorten consolidation time:Design constraints
Foundation layout- 2 pavement proposal
Independant Access and Egress- 2 layouts
No impact on current operations
On shore layouts
Pavement Proposal Flexible Composite Paving.
Clay Block Paving.
1 - 150mm thick bound base (HBM hydraulically bound materials) and a160mm surfacing layer. The top layer is generally impermeable meaning that drains will be required but it means that de-icing salts and surface water cannot gain access to the rigid base which means, providing that the surface layer is maintained properly, the lifetime of the pavement is much longer than a permeable one. ALTHOUGH The impermeability of the surface can mean that any pollutants that are spilled can be carried to the water coarse very easily through the drainage system.
2 - 225mm sub-base, 170mm roadbase, 30mm laying course, 80mm Clay block pavers. Much higher initial expenditure but have a much higher cost efficiency in the long term as its maintenance costs are significantly lower and the lifespan of the paving is much longer. Permeable block pavers, used to allow water to pass through the paving into the watercourses, in conjunction with a tanked permeable system.
10Access and EgressLayouts
Option 2Drop down barrierLayout 1
Linkspan Integral Tank85m total length, 60m span of concrete box girder connected to 25m long tank, total height of 7m2 guide piles Hinged ramp connectionBallast system increase stability
Longitudinal SectionApproach Structure2 lane bridge with width of 10mBridge spanning 120m (15m each span)900mm thickness of voided concrete slab 600mm diameter voidLength 38m, diameter 1.2m twin steel tubular pile connected to pile cap beam
Cross sectionApproach structure Layout 2
Maintenance building Admin parkingUnaccompanied trailersAccompanied trailersUnaccompanied trailersLinkspanPontoonMAFI truck routeAccompanied trailers routeLinkspan & Pontoon
Offshore constraintsRear door openingDraught allowanceTransition between terminal & cargo shipsStrong variation in tidal movementsBerthing & mooring structures
Additional structuresAdministrative building
Concrete slabStructural sectionServicesSteel Frame
Floor-to-ceiling height: 3m
Column spacing: 10m
Container office buildingPlan view
Section viewContainer office - benefitsConstruction cost is less than traditional building-> 40 shipping containers are used for main structureMore sustainableReused shipping containerTriple glazing windowCourtyard is bounded by greenwallShort construction period