1. International Levee Handbook Overview of the handbook Chapter 10 Construction

2. www.ciria.org Chapter 10 - context

3. www.ciria.org Chapter 10 Organisation 10.1Organisation of construction process 10.2Allowing for hydro-meteorological conditions 10.3Setting up and managing the site 10.4 Fundamentals of earth construction 10.5Methods for earth construction

4. www.ciria.org 10.1 Organisation of Construction Process Section Overview Setting the context Project planning Managing risks to the construction programme Quality, health and safety, and environment management Data acquisition and management for construction

5. www.ciria.org 10.1 Organisation of Construction Process The process for arriving at a programme based on cost (5 steps) courtesy Bam Nuttall

6. www.ciria.org 10.1 Organisation of Construction Process Key steps in planning the levee construction works are: –Project specific programme constraints –Checking the constructability –Developing the methods, resources, and corresponding construction outputs –Defining the associated costs. This section further gives examples on how to best manage: –Typical levee construction risks, including the use of a risk register –Quality, health and safety, and environment –Construction data (design inputs, survey data, construction outputs).

7. www.ciria.org 10.2 Allowing for Hydro-Meteorological Conditions Section Overview Working in coastal and fluvial environments Limiting flood risk during construction

8. www.ciria.org 10.2 Allowing for Hydro-Meteorological Conditions Levee construction can be affected by hydro-meteorological conditions, because of: variability and severity of the conditions that could potentially rise, risk of loss and damage, associated delays, costs and impacts if contingencies are not in place.

9. www.ciria.org 10.2 Allowing for Hydro-Meteorological Conditions The construction site and activities may temporarily increase the flood risk in the leveed area, by: increasing hydraulic loads (water level) decreasing the levees strength (by removing the revetment or digging in the levee, e.g. for a drainage feature/culvert).

10. www.ciria.org 10.3 Setting Up and Managing the Site Section Overview Managing constraints from natural and human environment Access routes and traffic Managing archaeological remains and utilities

11. www.ciria.org 10.3 Setting Up and Managing the Site A few examples of best practices for several construction constraints: Sensitive areas Protected and endangered species Relationships with authorities and residents Pollution affecting water quality Access routes and traffic Archaeology Utilities

12. www.ciria.org 10.4 Fundamentals of Earth Construction Section Overview Availability of materials Suitability of materials Equipment and elementary operations

13. www.ciria.org 10.4 Fundamentals of Earth Construction Five basic categories for levee construction equipment : clearing and grubbing existing vegetation stripping and excavating, placing and spreading loading and hauling compacting the soil treating the soil/installing sheet piling or cut-off walls

14. www.ciria.org 10.5 Methods of Construction Section Overview Levee test section Stages of levee construction Types of levee construction Instrumenting levee construction Integrating non-earthwork features into levees Construction approaches to repair pipes and culverts

15. www.ciria.org 10.5 Methods of Construction

16. www.ciria.org 10.5 Methods of Construction Types of levee construction and primary objectives: 1.New build – execute the work in a cost and time efficient manner to provide flood risk reduction, while maintaining environmental safeguards 2.Adaptation – restore previously existing levels of protection and prevent further damage to the levee 3.Repair – raise or strengthen the existing levee sections and elements without reducing the levels of protection or increasing the flood risk in an unacceptable way during construction 4.Decommissioning – remove the designated levee, features and/or segments to the designed level(s) in a uniform manner, while preserving adjacent features and remaining levels of protection

17. www.ciria.org 10.5 Methods of Construction Example of new build levee – Arles, France

18. www.ciria.org 10.5 Methods of Construction The primary objectives when integrating non-earthwork features into levees, include: Maintaining continuity of existing defences Maintaining operation of the non-earthwork facility Ensuring good compaction to achieve a good seal around non-earthwork features.

19. www.ciria.org 10.5 Methods of Construction The two most commonly used construction approaches to repair pipes through levees are described in detail: Open-cut pipe replacement – excavating down through the levee to the pipe or culvert, removing and replacing or repairing the damaged elements before reinstating the levee. Sliplining – a trenchless method in which a liner pipe is installed into a larger deteriorated host pipe.

20. www.ciria.org Thank you Chapter 10 Team Leads: To download the International Levee Handbook go to: www.ciria.org/ILHwww.ciria.org/ILH Joe Forbis USACE E: Joseph.Forbis@usace.army.mil Charlotte Spliethoff Royal HaskoningDHV (previously Grontmij) E: Charlotte.Spliethoff@rhdhv.com