Use of Underground Space - TU Delft OCW
Transcript of Use of Underground Space - TU Delft OCW
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Februari 7th 2012
Challenge the future
Delft University of Technology
Use of Underground Space Lecture 1: Overview
Dr.ir. Wout Broere
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Use of underground space in the Netherlands
The growing interest for the use of underground space, despite of the unfavourable circumstances in the Netherlands, is the result of: • The environmental complexity and the growing numbers of
infrastructural and environmental planning problems • The continuing demand for better quality of environment, nature
and liveability • Economical growth
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Use of Underground Space
Use of underground space contains: • Planning of underground space • Realization of underground works • Utilization of underground facilities
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Reasons for the use of underground space
Reasons to go underground can be: • Taking away/ reducing nuisance and thereby improving liveability • Reducing/ eliminating the security risks and damage to the
environment • Complex infrastructural/ environmental planning problems,
especially in areas where space is limited • Strategic consideration
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Amsterdam Centraal Station
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Amsterdam Centraal Station
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Motivation for going underground A B CUnderground construction as last and only alternatx xLarger functionality x xProtection from "outside" x xEnergy saving xDurability and m aintainance xLarger building density x xBetter accessability/ less lim itations x xMultiple/ effic ient use of space x xCom bination with other fac ilities x x"Ugly" objects underground x xDecreasing hindrance for the surroundings x xDecreasing hindrance for the environm entMaintainance of valuable functions xIncreasing external safety xEconom y and transport x
A = Users, B = Investors and operators,C = Nearby inhabitants and workers, D = Society
Different points of view and therefore different reasons for going underground.
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Primary functions in general (1)
Living: • Urban living • Suburban living Working: • Service industries • Industrial production and public utilities • Retail trade and small-scale production • Research and education Leisure: • Sports and recreation • Culture • Hotel and catering industry
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Primary functions in general (2)
Transport: • Personal transport • Transportation of goods • Transport without vehicles (digital information, electricity, bulk
goods, chemicals, liquids, gas etc.)
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Functions to put underground
Underground location is a good alternative for the following functions: • Storage • Transportation of goods • Junctions of infrastructural facilities Note: Living, working and leisure are functions that are,
without special provisions, less suitable for underground applications.
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Functions to put underground
Different types of underground structures by function (5): • Large infrastructure: road and rail • Small infrastructure: sewerage, water, electricity, gas, data • Storage: oil, gas or archives • Public spaces: shopping mall, parking • Dedicated systems (OLS)
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Conditions for underground construction
Whether the underground is going to be used for different functions is determined by: • Geological/ geo-technical/ geo-hydraulic conditions • Availability of space on ground level • Specific advantages which underground works could offer • Cost level versus alternatives (ground prices) • Developing phase of relevant industrial/ potential users • Possible adverse effects by using the underground (fire safety,
social safety, perception aspects)
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Obstacles in the underground (1)
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Obstacles in the underground(2)
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Image of the underground
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Different depth of underground constructions
• Deep-down the surface • Close to surface, shallow
construction • At the surface • Partly below surface • Covered • Partly covered
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Influence of drilling
Uncontrolled excavation causes relaxation of the soil stresses and therefore settlement.
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Study field: development of basements
• Basement structures are a well developed part of the study field, with sophisticated designs to save money. The cost level is the limiting factor for applying basement structures, but because of the increasing complexity of the circumstances or the scarcity of space aboveground, the techniques are more often applied.
• Points of attention are:
• the quality control • verifiability of the temporary and permanent construction elements
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Shallow foundation
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Pile foundation
• Shaft friction • Bearing capacity of pile point
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Floating foundation
• Equally divided
n wσ σ=
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Tunnels: general
• Land tunnel
• Immersed tunnels • Bored tunnel (EPB or Slurry shield) • Innovative methods
• U-polder • V-polder • TOMAS • Membrane
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Immersed tunnels (concrete)
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Steel Immersed tunnels (Japan)
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Bored tunnels
• Lining
• Types of Machines: • Slurry Shield • EPB shield Moskou (d=14,2m) Photo: Herrenknecht
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Bored tunnels: Lining
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Trace Westerschelde Tunnel
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Cross-section Westerschelde Tunnel
Bore head Westerschelde Tunnel D= 11,33 m
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Innovative methods
• U-polder • V-polder • TOMAS • Membrane solutions
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Innovative methods
Points of attention: • Quality control • Verifiability of the temporary and definitive construction
parts, which are going to be built. • The sensitivity of the constructions on the deviation of the
circumstances (obstacles) • The conduct in long-term
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Open-trench Constructions
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Open-trench Constructions: V-polder
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Open-trench Constructions: TOMAS method
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Multiple use of land
Integration of noise barrier
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Multiple use (Rotterdam)
Beursplein Rotterdam (Koopgoot)
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Multiple Use (Switzerland)
Bathhouse in Switzerland
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Trenchless Technology
• CIE5741 • Application for small infrastructure: cables, tubes and pipes • Small diameter • Two drilling techniques:
• Horizontal Directional Drilling • Micro-tunnelling
• Renovation of pipelines
Multiple Use of pipeline
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Trenchless Technology: Steps in HDD drilling
The boring can be divided in three
phases:
• Pilot drilling
• Pre-reaming
• Pipe positioning (pulling)
Pilot boring
Pipe positioning
Pre-reaming
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Pilot boring Reaming Pipe positioning
Midi and maxi-rig
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Trenchless Technology: Micro-Tunnelling
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Trenchless Technology: Micro-tunnelling
Launch Shaft Jacking frame Launch seal
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Specific points of attention for use of underground space
• Safety • Internal safety: safety of the users of the underground construction
(personal risk) • External safety: safety of people in the neighbourhood of the
construction (group risk) • Social safety: do the people feel comfortable underground? (light,
open view) • Management • Risks
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Internal Safety
Safety measures: • Physical measures if a calamity occurs: fire escape routes, fire extinguisher, one way traffic, fire resistant
covering etc. • Process measures to minimize a calamity: use of underground construction, adapt measures if the use changes,
appointing responsibilities etc.
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External Safety
Safety measures are taken to minimize the consequences of a possible calamity for the surrounding buildings close to the underground construction.
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Social safety: Perception Metro Rotterdam Wilhelminaplein Stadhuis
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Social safety: Perception
Metro Oriente (EXPO), Lissabon Metrostation Eendrachtsplein Rotterdam (Calatrava)
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Safety Chain
Pro-action: To avoid structural causes of unsafety. Prevention: To prevent a calamity to occur. Preparation: If a calamity occurs, the necessary equipment
and measures are present. Repression: Providing help when a calamity occurs. Maintenance: To get everything as soon as possible in the
‘normal’ condition, so the needed safety level is reached again.
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Risks
Permanent risks because of the use of the underground construction.
This is important for the choice whether the construction will be built underground or not ( transport hazardous materials)
Risks occurring during the whole process: Designers must be aware of the risks involved using a
certain construction method. To repair underground construction is extremely expensive and difficult. It’s important to now in advance, the possible measures to be taken if an accident happens.
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Risks
Risks occurring during the whole process: • Risks on which the construction is designed for and can be
controlled by safety measures • Risks on which the construction is designed for, but because of
failure of the safety measures, causes inadmissible consequences. • Risks on which the construction isn’t designed for. • Risks of which the danger wasn’t realized.
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Risks
• Legal risks • Organizational risks • Technical risks • Spatial risks • Financial risks • Social risks • Political risks
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Management
Integral approach is needed: • The purpose of an underground construction is hard to change or
to expand, so long term vision is needed • The underground construction must be integrated in the above
ground space. • To implement the safety chain in the beginning of the project. • Better communication between different stakeholders. • More transparent responsibilities. • Division of risks: what’s the risks that is left and who is
responsible for it.
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Legal aspects
• There’s no specific law in which the conditions and demands are listed for underground constructions. This causes difficulties in the decision and designing process.
• A lot of indistinctness and uncertainties about ownerships, liability, environmental laws and the like will frighten lots of investors, governments to apply underground structures.
• Zoning plan
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Underground transport(OLS)
Possible underground logistic system Amsterdam/Hoofddorp- Schiphol
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Underground transport(OLS)
Transport OLS to platform