(Site investigation report) 2500 ( civil and environmental engineering )
kash1
OffshoreEngineeringIntroduction_JM.pdf
Module Assessment
Engineering Geology Design Project: UBGMLU-15-2: Assignment Brief
The assignment comprises two components:
• Component A 50%: Individual Presentation (15min presentation). Learning outcomes 1-3 (see Section 4 in Module Handbook).
• Component B 50%: Individual Report (2500 words) Learning outcomes 4-5 (See section 4 in Module Handbook)
Module Assessment
The topic of the Individual Presentation and Individual Report must be chosen by the student. The topic can be based on any engineering geological subject that the you find interesting. The lecture material in the module is designed to give you an overview of interesting engineering geological systems. The lecturers may be able to help you identify data to analyse. Your topic could focus on one of the following areas: • Hydrogeology • Fracture/fault influences • Geothermal • Geohazards – earthquakes, landslides • Site investigation • Rock mass rating – tunnels, bridges, etc • Offshore Site Investigation • Foundations
Module Assessment
Component A 50%: Individual Presentation (15min presentation). Deadline: Thursday 15th April, 2021. Format: PowerPoint presentation Submission: Via Blackboard Delivery: Blackboard Collaborate Assessments on Tuesday 20th April, 2021.
Keywords from Assignment Brief • Explore theoretical background to different geological factors • Identify how geological factors affect design and construction • Conduct a literature review of reported case studies • Make individual presentation of findings
Introduction to Offshore Engineering
Guest Lecturer
https://www.infomar.ie/
Introduction to Offshore Engineering
1. Introduction to offshore Engineering – offshore wind (fixed and floating), spudcans, anchors, pipelines, freefall anchors.
2. Marine Soil Conditions 3. Offshore Site Investigation – Insitu & Geophysical 4. Opportunity to carry out offshore SI using Kingdom Software on future
windfarm site
Offshore Wind Foundation Types
Spudcan for offshore soil
Introduction to Offshore Engineering
Modern day Geotechnical Engineering
Anchors
Wind turbines
Mooring chains
Pipelines
Floating LNG
Offshore Mining
What is Geotechnical Engineering
Modern day Geotechnical Engineering
Deeply Buried Pipeline in offshore soil
Water
Soil
Direction of water flow
What is Geotechnical Engineering
Modern day Geotechnical Engineering
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What is Geotechnical Engineering
Modern day Geotechnical Engineering
Free-fall “torpedo” anchors travelling at about 50 km/hr
Images taken at 2,000 frames per second
What is Geotechnical Engineering
Marine Soil and Conditions
• 75% of worldwide sediment found on the continental margins that only cover 20% area.
• This is due to weathering of rock and sedimentary processes delivering sediments to depocenter
• However marine sediment is not only terrigenous (transported from land)… also pelagic
Gravel > 2mm
0.063< Sand <2mm
0.002< Silt <0.063mm
Clay < 0.002 mm
Grav el Grav el
Marine Soil and Conditions
Weathering of rocks: Physical, Chemical, Biological
https://www.geolsoc.org.uk/ks3/gsl/e ducation/resources/rockcycle/page34 61.html
Marine Soil and Conditions
Calcareous clay
• Rivers are the largest source of sediment in ocean
• 20 billion tonnes per year.
• Offshore soil can also be pelagic in nature i.e. biogenic material deposited very slowly in the open ocean either by settling through the volume of oceanic water or by precipitation.
• The result is that offshore sediments are usually soft and therefore challenging as an engineering material
offshore site investigation
offshore site investigation
Marine Site Investigation insitu testing
Marine Site Investigation
Geophysics: Sub bottom profiling
• Sub bottom profiling
Marine Site Investigation
Opportunity for this Module Geophysics: Sub bottom profiling of future offshore wind site
Use Kingdom Software to identify strata of a proposed windfarm location off Dublin Bay
