Engineering design and construction of marine structures in Arctic

1

Engineering design and construction

of marine structures in Arctic

Speaker: Sergey A. Semenov, Ph.D.Corporate Development Director, Morstroytechnology

Gzhatskaya street 21, building 2, litera "A“Saint-Petersburg, Russia

Phone: (812) 333-13-10, Fax: (812) 333-13-11e-mail: [email protected] www.morproekt.ru

МОРСТРОЙТЕХНОЛОГИЯ

Arctic experience

http://www.morproekt.ru/ 227.02.2015

Geography of Morstroytechnology projects in Arctic

Production island

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SabettaSalmanovskoe

Seyaha


Solutions for artificial islands


In Arctic conditions, artificial islands are unnatural obstacles for ice movement in open water area, and are subject to immense ice loads.

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Solutions for artificial islands (continued)


Construction modelling by finite elements method

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МОРСТРОЙТЕХНОЛОГИЯ Problems of engineering design and construction in Arctic


1. Supply chain for

construction

materials.

2. Heavy ice

conditions, ice

loads on hydraulic

structures.

3. Construction

technology in

Arctic conditions.

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ice-breaker channel


Severe Arctic conditions


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Arctic port of Pevek




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Yakutsk




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Salmanovskoe field


Solutions for successful projects


1. Supply chain for construction materials

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МОРСТРОЙТЕХНОЛОГИЯ Complex approach to field exploration and supply logistics


Many fields are located in remote regions with lack of any transport infrastructure and require special logistic approach to launch the project

winter road loading of oversized equipment

Some specific:

Example: cargo flow for oil field exploration, in thou tones

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Severe climate conditions Seasonality of transportUneven cargo flow during explorationOversized and heavy cargo Lack or absence of transport infrastructureHigh risks and deadline restrictionsHigh construction and operational costs

МОРСТРОЙТЕХНОЛОГИЯ Example of logistic strategy for remote Arctic oil and gas field exploration

Systematization of cargo flows data, origin – destination matrix

Project results

Cost modelling –selection of optimal transport schemes

Analysis of existing infrastructure

Sensitivity analysis

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• optimal transport scheme by costs and risks

• seasonal distribution of volumes• decisions to build or acquire

infrastructure, fleet etc.• infrastructure development plan• project management solutions


Solutions for successful projects


2. Heavy ice conditions, ice loads on hydraulic structures

2.1 Morstroytechnology developed modern probabilistic forecasting methodsto define ice conditions

Correlation between daily average temperatures and icing index

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Monthly average temperatures in May in 1961-2012



2.2 Development of new approaches to calculations of ice loads on hydraulic structures


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Solutions for successful projects (continued)

Interrelation of ice loads and speed of ice movement

Ice loads per meter of hydraulic structure depending onlength of section and length of obstacle



2.3 Comparative analysis of ice loads calculated using methods developed by Morstroytechnology and other internationally used methods

Ледовая нагрузка от ровного льда на 1 п. м. в июне

0

1

2

3

4

5

6

0 50 100 150 200 250

Ширина секции, м

F, МН/м

СП Ровный лед ИД табл. 2.5, табл. 2.8 СП Ровный лед ИД табл. 1.4

CAN Ровный лед ИД табл. 1.4 ISO Ровный лед ИД табл. 1.4

KRCA V‐1

Ледовая нагрузка от торосов на 1 п. м. в мае

0,00

2,00

4,00

6,00

8,00

10,00

12,00

14,00

0 20 40 60 80 100 120

Ширина секции, м

F, МН/м

СП Торос ИД табл. 2.5, 2.8 СП Торос ИД табл. 1.4

CAN Торос ИД табл. 1.4 ISO Торос ИД табл. 1.4

СП 38.13330.2012; CAN/CSA-S471-04; ISO 19906:2010; KRCA (K. R. Croasdale & Associates Ltd )


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Ice load from fast ice on meter of quay in June Ice load from ridges on meter of quay in May



2.4 Methods of calculation of ice parameters and ice loads on hydraulic structures calcultion developed by Morstroytechnology are approved by “B.E. Vedeneev VNIIG”, JSC

“B.E. Vedeneev VNIIG”, JSC is one of

the largest scientific centers in

Russia in scientific validation of

designing, construction and

operation of hydraulic, thermal and

nuclear power plants,

hydroengineering and special

purpose structures, HES equipment.

VNIIG is entitled to develop

standards of ice loads calculation in

Russia.


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2.5 Structural analysis of ice load impact

1. The choice of parameters of frozen fill.

2. Thermal stabilization of soil.

3. Modern engineering software.

Backfill soil isotherms

Design of artificial island (PLAXIS)

System of thermal stabilization of soil


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МОРСТРОЙТЕХНОЛОГИЯ Construction technology in Arctic conditions


Use of Russian inventions and patents – welded pipe sheet pile with caliper tongue and groove connection (patent of Goncharov V.V. №2471042)

1. Successful pile driving in permafrost soils.

2. Ice load accommodation in construction period.

3. Import substitution.4. Quality control at production plant.

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CONCLUSIONS


1. Engineering design of infrastructure in Arctic requires in-depth analysis and planning of supply logistics for construction materials, equipment, and personnel. Construction of additional supportive infrastructure might be needed.

2. Artificial islands are a special area of focus in exploration of Arctic. Research and improvement of techniques of artificial islands’ construction will allow technological breakthrough for Arctic projects.

3. Ice and ice loads have substantial impact on marine structures. Modern methods of ice loads calculation may change significantly the type of marine structure and construction costs.

4. Permafrost condition also has great impact on structures. Depending on situation it may influence both positively and negatively.

5. Experience and knowledge acquired by Morstroytechnology allow to solve tasks of any complexity in Arctic conditions and optimize construction costs.

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Thank youfor your attention!

Tel.: +7 812 333 13 10Fax: +7 812 333 13 11

e-mail: [email protected] www.morproekt.ru

Engineering design and construction of marine structures in Arctic

Technology

heavy ice conditions

ice conditionscorrelation

calculations of ice

immense ice loads

ice movement

construction modelling

construction technology

remote arctic oil