GLADSTONE 1800mm Steel culvert rehabilitation

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Presentation transcript:

GLADSTONE 1800mm Steel culvert rehabilitation

Callemondah 4680 QLD

History of the project Rainfall January 2011

Flooding 2011

Problems

Idea Repair the ground Repair the pipe Trenchless

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.

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

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.

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

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 Elongation @ 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

Challengers Cleaning Rain Hot weather with resin Bypass pumping

Job Done Job completed on time and Budget

2013 Gladstone received 1100mm in 3x days

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