1. GLADSTONE 1800mm Steel culvert rehabilitation

2. Callemondah 4680 QLD

3. History of the project
Rainfall January 2011

4. Flooding 2011

5. Problems

6. Idea
Repair the ground
Repair the pipe
Trenchless

7. Proposed Solution Tender Engineer and prove methodology
Rehabilitate the ground
Rehabilitate the culvert
Minimal disruption to public and rate payers
Culvert remain in service.
No excavation
Needed to achieve equivalent to class 2 RC for
Load requirements.

8. Newcastle University Composite only 150MPa 26.5kN/m
3. Finite Element Predictions
The Table below shows the results of the finite element analysis work. Pipe Configuration Limiting Stress (MPa) Uniformly Distributed Load kN/m)
Composite only 150MPa 26.5kN/m
Composite only with support 150MPa 112kN/m
Composite and steel 350MPa in the steel 30kN/m
Composite and steel with support 350MPa in the steel 128kN/m

9. Uretek Injection Ground Engineering
Mainmark have injecting Urethane for 25yrs
Used to fill voiding and stabilise the ground the ground and foundation of the culvert.

10. ENCAP6™ Advanced Structural Relining Technologies
Product Features
Exceptional abrasion resistance
Excellent chemical resistance
High compressive strength
Long-life hydrolytic stability
Compliments our existing suite of
advanced engineering solutions
A liner that chemically and
mechanically bonds with concrete
and steel.
Sprayable

11. ENCAP6™ Physical Properties
Properties at 25°C
Method
Units
Encap6 with laminate
Encap6 without laminate
Flexural Strength
ASTM D790
MPa
280
135
Flexural Modulus
GPa 14 6
Flexural Break %
4.5
Tensile Strength
ASTM D638
150 67
Tensile Modulus
6.2
Density
ASTM D792
g/ml
1.6
1.3
Viscosity
ASTM D2196 cP
4,000
6,000
Thix Index
n/a
5.0
5.6
Glass Content
Formula 50
12.5
Styrene Content
45%
Barcol Hardness, Ultimate (GYZJ-935 scale)
ASTM D2583 60 38
HDT
ASTM D648 °C
105

12. Challengers
Cleaning
Rain
Hot weather with resin
Bypass pumping

13. Job Done
Job completed on time and Budget

14. 2013
Gladstone received 1100mm in 3x days

15. Take home message Don’t just reline the internal surface
Treat, Repair and Fill the foundation