Hjem

1. Introduction: long and deep tunnels and the related challenges
1.
1. Key drivers
1.
2. Challenges
1.
3. Approach to success
1.
4. Scope of the book
2. The missing links
2.
1. How to find ?missing links?
2.
2. The primary target: ?environment and peoples care?
2.
3. The different types: railway, highway,water transfer
3. Approach to risks analysis and management
3.
1. Basic definitions
3.
2. Sources of initial risks
3.
3. Analysis and management of risk: the residual risk
3.
4. The iterative design: the control of residual risks through a Plan for Advance of Tunnel (PAT)
4. Conceiving long and deep tunnels as a system in function of purpose
4.
1. Basic concepts and definitions
4.
2. Railway tunnels
4.
3. Highway tunnels
4.
4. Water diversion tunnels
5. Estimating the scale of investment: range of costs & time target
5.
1. Costs estimation methods
5.
2. Time estimation methods
5.
3. The example of ?Decision Aid for Tunnelling? (DAT)
5.
4. The example of ?Cost Estimate Valuation Process (CEVP)? - Seattle
6. Technical measures for uncertainities and risks mitigation
6.
1. Geo-engineering investigations
6.
2. Construction method choice
6.
3. Geotechnical design
6.
4. Design for construction and logistics
6.
5. Construction control and design optimisation
6.
6. Costs and time updating
6.
7. Suitable procurement methods
7. Geological model
7.
1. The intrinsic uncertainty of a geological model for long and deep tunnels
7.
2. The necessity of a probabilistic approach
7.
3. The ?minimalist solution? by necessity
7.
4. The need for a continuous updating during advance
8. Choice of construction methods
8.
1. Conventional or mechanized method? Some guiding concepts to the choice
8.
2. Conventional methods: a brief description
8.
3. Mechanized methods: the various types of TBMs
9. Geotechnical design
10. Design for construction and logistics
10.
1. Construction methods statement
10.
2. The strategic importance of logistics in long tunnels
10.
3. Construction-control parameters and thresholds
10.
4. The iterative design
11. Managing the residual risk via the PAT methodology
11.
1. The selection of key parameters for controlling the residual risk
11.
2. The pat application to the L. & D. tunnels
12. Cost updating using a special tool: the DAT (Decision Aid for Tunnelling)
12.
1. How to use DAT
12.
2. The DAT limits
13. Need for innovative procurement methods
13.
1. Existing procurement methods
13.
2. Problems with current methods ? for LDT in particular
13.
3. Present solutions with innovative methods
13.
4. Suggestions for elaboration by FIDIC of optimal solution
14. Conclusions with outlook to the future Appendix: Some case histories: what we can learn from the past experiences