Stephen John Pryor Bachelor of Civil Engineering KnewPod Systems Project

PROJECT PLANNING

→ Client Brief

→ Purpose of Project

→ Project Aims

→ Objectives

→ Project Outcomes

→ Project Methodology

RESIDENTIAL SLAB & BEAM RESEARCHα Standards Australia

α AS 2870 Residential Slabs & Beamsα AS 3600 Concrete Structuresα AS 1289 Soil Testing

α Soil Survey Laboratoryα Walsh and Mitchell Methodsα Newcastle Test Site

GOVERNING PARAMETERSτ KnewPod System Beam Grillage & Structural

Componentsτ Walsh Mound Theoryτ Heave Pressures & Foundation Soil

Displacementτ Seasonal Moisture Variations

A

S

M

H1

H2

E

Soil Classification Soil Capacity

Soil

Disp

lace

men

t (m

m)

Soil Pressure (kPa/m)

A

S

M

H1

H2

E

LOW

HIGH

SYSTEM MODELLINGɛ Finite Element Modelling (FEM)ɛ Strand7ɛ Centre Heave ɛ Edge Heave

RESULTS OF ANALYSISσ The System Underperformed in Relation to Australian

Standards

σ Shear Force, Bending Moment & Displacement Failureσ Not Sure if Soil Shears into Void

PROJECT OUTCOMESβ KnewPod System Not Complying with BCA for Class M

Soilβ Further R&D Required

RECOMMENDATIONΔ Increase internal beam depthsΔ Analyse current system for Class A

0 mm

100 mm+

20-4

0 m

m

Concrete Slab and Beams

Polystyrene KnewPod Void Former

RAFT SLAB DESIGN FOR VOID FORMER APPLICATION ON REACTIVE SITES – A GEOTECHNICAL ANALYSIS