13 juni2012 kiviniria abjan jacobse teamleidergeotechniek ...€¦ · • kunstwerken (crossings)...
TRANSCRIPT
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13 juni 2012
Kivi Niria
Abjan Jacobse
Teamleider geotechniek (Botlekbrug)
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Geotechniek bij de A15
• Algemeen project / geotechniek• Kunstwerken (Crossings) • Botlek corridor
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Project
1. gereed 2x2
2. 2x2 rijstroken
+ 2x1 plusstrook 3. 2x3 rijstroken
+ 2x2 parallelstroken
Nieuwe Botlekbrug
3
Aanpassing snelweg A15 van km 25,0 - km 62,0
• Toevoegen 2 parallelwegen aan bestaande 2x3 en 2x2 rijstroken (over 16 km)
• Uitbreiding bestaande rijstroken van 2x2 tot 2x3 (over ca. 11 km)
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Scope geotechniek
Algemeen• Grondonderzoek opstarten en begeleiden
Crossings• Geotechnisch ontwerpen 12 nieuwe kunstwerken
Botlek corridor• Geotechnisch ontwerp nieuwe Botlek hefbrug (hoofdpijlers)• Geotechnisch ontwerp aanbruggen (9 ramps)• Geotechnisch ontwerp kunstwerken Hartelkruis
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Scope geotechniek
Roads• Geotechnisch ontwerp 18 km
aardebaan – zetting en stabiliteit• Beïnvloeding kabels en leidingen• Ontwerp paalmatrassen• Beïnvloeding bestaande
kunstwerken/objecten
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Grondonderzoek
• Verzamelen archief gegevens (Havenspoorlijn, Vaanplein, etc.)• Meest toegepaste grondonderzoeksmethode: ca. 1000 sonderingen,
waarvan ca. 35 op water• Boringen en laboratorium testen
– +/- 50 boringen– 120 samendrukkingsproeven– 30 triaxiaalproeven– 280 water gehaltes
+ volumieke gewichten• Peilbuizen (+/- 15)
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Crossings
• Vaanplein• Duiker Molenvliet• Verlengde Zuiderparkweg• Oudelandseviaduct
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VaanpleinVaanplein
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Vaanplein
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Vaanplein
Paalmatras
KW100
KW300
KW200
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Ontwerp, van idee…
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Naar DE ontwerp
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Naar uitvoering
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Vaanplein
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Duiker Molenvliet
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Verlengde Zuiderparkweg
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Oudelandseviaduct
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Example: Oudelandseviaduct
30 m
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30 m
?
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Example: Oudelandseviaduct
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Nieuwe Botlekbrug
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Huidige Botlekbrug tijdens de bouw in 1955
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Huidige Botlekbrug bottleneck spoor, weg en scheepvaart
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Nieuwe Botlekbrug
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Movable
part
(2 x 90 m)
Long spans
West
(60-66m)
Long spans
East
(60-66m)
Short spans
West
(31-37 m)
Short spans
East
(31-37m)
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Longitudinal section bridge + charateristics
NAP+65m
NAP+14m
NAP-20m
NAP+45m
87.4m
91.4m
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60m
NAP+14m
NAP-20m
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Huidige Botlekbrug vs nieuwe Botlekbrug
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Foundation main piers
• Footprint: 60 m x 15 m• Foundation level NAP-20m• Under water concrete until
NAP-1m• Shallow foundation
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Water
Clay/sand
Sand
Phase 1: installation sheet piles and strut
Water
Sand
Phase 2: excavation building pit
Clay/sand
8-14 m
6-12 m
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Water
Clay/sand
Sand
Phase 3: pouring u.w. concrete
Underwater
concrete
River bottom level (NAP -14 m)
Water level (+/- NAP)
Foundation level (NAP -20 m)
Top pylon (+65 NAP)
Phase 4: Construction superstructure
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Doorsnede brug
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Foundation Design
• Soil investigation and design parameters• Bearing capacity (ULS) analysis• Deformation (SLS) analysis• Influences on adjacent structures
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Geotechnical Soil Investigation Summarized
• Site investigation in multiple phases• 12 CPT’s to NAP-30 to -39m• 32 CPT’s to NAP-40 to -49m• 2 CPT’s to NAP-50 to -55m (refusal)• 1 CPT to NAP-60m• 4 Boreholes to NAP-40m
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General Soil Stratigraphy
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Doorsnede brug
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Variability Kedichem Clay From Factual Data
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Variability Kedichem Clay From Factual Data
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Geotechnical Laboratory Program
• Laboratory tests:• 23 volumetric weight + water content on clay• 9 Torvane / Pocket penetrometer tests on clay• 7 Atterberg Limits on deep clay (Kedichem)• 28 grain shape descriptions on sand• 68 PSD’s on sand• 27 CID triax tests on 9 samples at RD 40%, 60%, 80%• 4 CIU triax tests on Kedichem clay incl. unload/reload step• 9 Oedometer tests on Kedichem clay inc. unload/reload step
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Design Parameters – Drained Strength
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Design Parameters – Particle Shape
Coefficient of uniformity Cu varies between 1,5 and 6Grain size d50 varies between 0,2 mm and 0,6 mm
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Bearing capacity ULS
• According to NEN 6700/6702/6740:• “Veiligheidsklasse 3”• “Geotechnische Categorie 3”• Shallow foundations NEN 6744• Extensive parametrical variation studies
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Deformation analysis, settlements – Plaxis 3D
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Settlements - Sensitivity analysis
• OCR• Vertical load• Permeability clay layer• Soil stratigrapy
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Influences on adjacent structures
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Existing Botlek Bridge
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Installation sheetpiles
• Risks– Compaction due to
vibration causes settlements bridge and tunnels
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Excavation pits
• Analysis– Horizontal loading existing
piles– Bearing capacity existing
piles– Settlements/rotation existing
bridge
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Construction of the new bridge (loading)
• Settlements of existing bridge and tunnel(s)
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Removal of the existing bridge
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Bedankt voor uw aandacht!