3D Modelling of Frozen Ground and Associated Volume ... - Plaxis
3D Modelling of Frozen Ground and Associated Volume ... - Plaxis
3D Modelling of Frozen Ground and Associated Volume ... - Plaxis
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270,000 d<strong>of</strong>). Each finite element has 10 nodes.<br />
The slurry wall panels have been defined around a<br />
11m diameter shaft. The frozen pipes have been<br />
placed along a series <strong>of</strong> concentrated circles.<br />
In PLAXIS the frozen process is modelled in<br />
sequence by applying an isotropic volumetric<br />
prescribed strain <strong>of</strong> 1.5 % (so 0.5% in X-direction,<br />
0.5% in Y-direction, 0.5% in Z-direction ) followed<br />
by replacing the properties <strong>of</strong> the swollen clusters<br />
by those <strong>of</strong> frozen soil after each expansion phase.<br />
The model consists <strong>of</strong> the following construction<br />
sequence:<br />
• Initial stress definition <strong>and</strong> initial water level<br />
• Slurry wall construction<br />
• Excavation<br />
• <strong>Ground</strong> freezing part I at diameter D1<br />
• <strong>Ground</strong> freezing part II at diameter D2>D1<br />
• <strong>Ground</strong> freezing part III at diameter D3>D2<br />
• <strong>Ground</strong> freezing part IV at diameter D4>D3<br />
Vacancy: Advisor PLAXIS Expert Services<br />
<strong>Plaxis</strong> bv is currently looking for an advisor to<br />
strengthen our expert services team.<br />
The advisor is expected to plan, execute<br />
<strong>and</strong> report projects <strong>and</strong> results on his/her<br />
own. He/she also acts as project leader <strong>and</strong><br />
maintains contacts with clients, universities<br />
<strong>and</strong> other external parties.<br />
“The implementation <strong>of</strong> PLAXIS to applications <strong>of</strong> artificial ground freezing<br />
has significantly advanced the analysis <strong>of</strong> complex problems... “<br />
For more information please visit:<br />
www.plaxis.nl/jobs<br />
PLAXIS Expert Services added value:<br />
• Quick start on the job<br />
• Set-up <strong>of</strong> fully optimized <strong>and</strong> ready to run <strong>3D</strong><br />
FE models<br />
• Regular model review<br />
• Next business-day advanced technical<br />
assistance<br />
Customer quotes<br />
The implementation <strong>of</strong> PLAXIS to applications<br />
<strong>of</strong> artificial ground freezing has significantly<br />
advanced the analysis <strong>of</strong> complex problems,<br />
particularly the mechanics associated with ground<br />
expansion as well as the decrease in frozen soil<br />
strength with time under load.<br />
Applying PLAXIS to this problems was a<br />
major undertaking for our engineers. PLAXIS<br />
pr<strong>of</strong>essionals assisted us tremendously in<br />
moving forward our analytical tools <strong>and</strong> ability to<br />
underst<strong>and</strong> the mechanics <strong>of</strong> our project as well as<br />
being able to present the results to our client with<br />
incredible output graphics.<br />
The PLAXIS consultants eagerly accepted the<br />
challenge, fully understood our concerns <strong>and</strong><br />
rapidly <strong>and</strong> efficiently assisted us in generating<br />
the models that accurately simulated the complex<br />
issues with stress <strong>and</strong> deformation on existing<br />
structures. Their assistance has enabled us to<br />
make PLAXIS a readily available tool to analyse<br />
a wide arrange <strong>of</strong> ground freezing challenges.<br />
Their knowledge, accuracy <strong>and</strong> efficiency are<br />
unsurpassed in this industry.<br />
About Moretrench<br />
Moretrench is geotechnical contractor delivering<br />
geotechnical solutions to the underground,<br />
industrial <strong>and</strong> environmental remediation<br />
industries. Moretrench <strong>of</strong>fers a wide range <strong>of</strong><br />
specialized services with skilled <strong>and</strong> experienced<br />
engineering teams in the field <strong>of</strong> dewatering<br />
<strong>and</strong> groundwater control, ground freezing,<br />
earth retention <strong>and</strong> anchors, deep foundations,<br />
underpinning, grouting <strong>and</strong> ground improvement,<br />
environmental remediation.<br />
Stress development in the slurry panel<br />
www.plaxis.nl l Spring issue 2013 l <strong>Plaxis</strong> Bulletin 21