5.3 Selection of Generic Options
The generic categorisation was described in Section 4. In particular some of the issues
outlined in this section have been discussed in greater detail in Section 4.2. This stage of the
selection process aims to eliminate all inappropriate generic types by the mapping of the
functional and structural attributes, as well as operational requirements of the generic groups
of systems to the protection requirements and organisational resources.
The functional characteristics are generally dimensional, location and water tightness related.
These include:
! Required protection height versus available height range
! Ability to increase height of protection during service conditions
! Available width versus required width for protection system (including space for
installation or closure operations)
! Available ground and terrain conditions versus suitable terrain conditions for temporary
barrier
! Suitability of protection system for required horizontal and vertical alignment
! Sub-soil, in particular seepage characteristics.
The operational consideration is the mapping of the time and organisational resources
available to that required for the erection or closure of the moveable part of the protection
system. This ensures that an organisation does not choose a system that it is unable to ensure
its complete installation within the lead-in period available. The operational considerations
include:
! Available period for mobilisation and closure versus period required for operation of the
protection system with available resources
! Required resources (labour, plant, materials) for different system types
! Required storage, transportation and lifting facilities
! Requirement for site preparation and clean up
! Ease of installation.
The structural consideration involves estimating the design loading on the system and
assessing its ability to resist this and to maintain structural stability. The characteristics to be
considered include:! Resistance to failure by sliding, overturning, foundation bearing capacity failure,
excessive seepage and piping
! Ability to repair damage during service
! Likelihood of progression of damage to whole defence failure.
At the end of these considerations, a reduced list of appropriate generic groups should be
available from which specific systems can be selected.
Tables showing characteristics of the generic groups of temporary and demountable protection
systems are provided as Tables 5.1 to 5.6 to assist with the selection process.
At the end of this stage, all generic groups of systems that are not suitable for the expected
loading, available resources and site conditions would have been eliminated.
5.3 Selection of Generic Options
The generic categorisation was described in Section 4. In particular some of the issues
outlined in this section have been discussed in greater detail in Section 4.2. This stage of the
selection process aims to eliminate all inappropriate generic types by the mapping of the
functional and structural attributes, as well as operational requirements of the generic groups
of systems to the protection requirements and organisational resources.
The functional characteristics are generally dimensional, location and water tightness related.
These include:
! Required protection height versus available height range
! Ability to increase height of protection during service conditions
! Available width versus required width for protection system (including space for
installation or closure operations)
! Available ground and terrain conditions versus suitable terrain conditions for temporary
barrier
! Suitability of protection system for required horizontal and vertical alignment
! Sub-soil, in particular seepage characteristics.
The operational consideration is the mapping of the time and organisational resources
available to that required for the erection or closure of the moveable part of the protection
system. This ensures that an organisation does not choose a system that it is unable to ensure
its complete installation within the lead-in period available. The operational considerations
include:
! Available period for mobilisation and closure versus period required for operation of the
protection system with available resources
! Required resources (labour, plant, materials) for different system types
! Required storage, transportation and lifting facilities
! Requirement for site preparation and clean up
! Ease of installation.
The structural consideration involves estimating the design loading on the system and
assessing its ability to resist this and to maintain structural stability. The characteristics to be
considered include:! Resistance to failure by sliding, overturning, foundation bearing capacity failure,
excessive seepage and piping
! Ability to repair damage during service
! Likelihood of progression of damage to whole defence failure.
At the end of these considerations, a reduced list of appropriate generic groups should be
available from which specific systems can be selected.
Tables showing characteristics of the generic groups of temporary and demountable protection
systems are provided as Tables 5.1 to 5.6 to assist with the selection process.
At the end of this stage, all generic groups of systems that are not suitable for the expected
loading, available resources and site conditions would have been eliminated.
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