EFFC – Annual Meeting – Berlin 2015 Geosynthetics in ... · PDF fileEFFC –...

UnternehmenspräsentationEFFC – anual meeting – Berlin 2015

EFFC – Annual Meeting – Berlin 2015Geosynthetics in Special FoundationsDipl.-Ing. Hartmut Hangen – HUESKER Synthetic GmbH


Agenda

08.01.2016 2

HUESKER SYNTHETIC

Geosynthetics Basic Knowledge

Access Roads

Working Platforms

Piled Embankment

Geotextile Encased Columns

Fabric Containment

Dewatering of Sludge


HUESKER Synthetic

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Where tradition meets progress…


History

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1861 Founded as H.&J. Huesker & Co.

1863Start of cotton fabric production in the newly built facilities.

1958 Merging of various production locations for spinning, weaving and finishing in Gescherand surrounding areas.

1913 Production on 1172 looms with 613 employees


History

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1971Launch HaTelit®

1972Launch Stabilenka®

1987Launch Fortrac®.

1973Foundation of independentHUESKER Synthetic GmbH


History

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2006 Launch SoilTain®

2015Opening of productionin Dülmen

1991Foundation of subsidiaryHUESKER Inc. (USA)

1991Launch productLubratec®

UnternehmenspräsentationEFFC – anual meeting – Berlin 201508.01.2016 7

H Inc. / Charlotte

Huesker Ltda / São José dos Campos

Huesker S.A.S. / Gresswiller

Huesker Asia / Singapur

NaBento Vliesstoffe / EllefeldHuesker S.r.l./ Triest

HUESKER Group

Headquarter

Sales partner

Subsidiary

HUESKER Inc. / Charlotte

HUESKER Ltda. / São José dos Campos

HUESKER Ltd. / WarringtonNaBento Vliesstoff GmbH / Ellefeld

HUESKER France SAS / Gresswiller

HUESKER geosintéticos S.A. / Noain

HUESKER S.r.l. / Triest

HUESKER Synthetic GmbH / Gescher

HUESKER OOO / Moscow

HUESKER Middle East / Jordan

HUESKER Asia / Singapore

HUESKER Synthetic B.V. / Den Dungen


Production facilities

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Gescher (Germany)Gescher (Germany)

Dülmen (Germany)Dülmen (Germany)

Ellefeld (Germany)Ellefeld (Germany)

Shelby (USA)Shelby (USA)


Business Areas

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Roads andPavements

Earthworks andFoundations

Environmental Engineering

HydraulicEngineering

Mining Industrial Agriculture


Earthworks and Foundations - Applications

1

Embankments on Piles

Embankments on Soft Soils

Bridging of Sinkholes

Geosynthetic ReinforcedSoil

Geotextile EncasedColumns

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Roads and Pavements - Applications

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Temporary Roads Railways Permanent Roads

Working Platforms andWind Turbines

Rehabilitation ofConcrete Pavements

Rehabilitation of Asphalt Pavements


Hydraulic Engineering

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Dams and Dikes

Revetments

Bed / Sour Protection

Breakwaters

Bank Protection

Canals


Environmental Engineering

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Landfill Construction

Groundwater Protection

Water Reservoir

Sludge LagoonRemediation

Dewatering


Agriculture

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Biogas and Manure

Cover Systems

Textil Halls

Light and Air


Product Groups (GEO)

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Grids Container Wovens

Nonwovens GCL Composites


Agenda

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HUESKER SYNTHETIC


Access Roads

Working Platforms

Piled Embankment


Fabric Containment


UnternehmenspräsentationEFFC – anual meeting – Berlin 201508.01.2016

Basic knowledge about Geosynthetics

17


Geosynthetics / product groups

geogrids

woven geogrids

knitted geogrids

drawn geogrids

stirps

special products

permeable impermeable / low permeability

geocomposites

geomembranes

geomembranes

geos. clay liners(GCL)

geotextiles

non-woven

woven

knitted

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Functions of Geosynthetics

191908.01.2016


Polymer properties

Technical data of most typical raw materials for GSY production

Raw material PA (6,6) PE PET PP AR PVA

Density (g/m3) ~ 1,14 ~ 0,95 ~ 1,36 ~ 0,90 ~ 1,44 ~ 1,31Soft. / MeltingTemperature (°C) ~ 220 / 260 ~ 105 / 135 ~ 230 / 260 ~ 150 / 165

carbonized> 450 ~ 220 / 260

Specific strength High Medium High Medium Excellent HighUltimate strain ofyarn (%) 30 - 50 15 - 30 9 - 15 10 - 20 3 - 4 5 – 6

Creep Low High Low High Low LowResistance:- acid- alcaline- light (UV)

badgoodbad

goodgoodbad

goodbad

good

goodvery good

bad

goodgoodlow

goodvery good

good08.01.2016 20


Production / Nonwoven

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Production / geogrid punched and drawn

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Production / woven geogrid

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Reinforcement / ultimate vs. design strength

The design tensile strength of a geosynthetic reinforcement is calculated applying partial reduction factors on the ultimate tensile strength of the virgin product. Those reduction factors are product specific

RB,k0 /

(RFcreep x RFinst x RFconn x RFenv x RFdyn x M)

– RB,k0 = Ultimate Tensile Strength as per CE-Datasheet

– RB,d = Design Strength / - resistance2408.01.2016

RB,d =


Reinforcement / ultimate vs. design strength

RFcreep : creep ruptureRFinst : installation damageRFconn : connectionsRFenv : environmental influencesRFdyn : dynamic loadingM : partial material factor

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Deh

nung

Zeit

Kra

ft

time

time

Polymers and Creep

Testing of creep characteristics

Ref.: Hufenus

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Creep rupture

00,5

11,5

22,5

33,5

44,5

5

AR PVA PET PA PEHD PP

RED

UR

CTI

ON

FAC

TOR

R

F cr

eep

[-]

Bruch 10% Ref: Thornton, Lothspeich, EuroGeo 2000, Bologna

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break


Rfinst., Rfconnec., Rfenvironm.

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RFconn ~ 2,0

Ainstall ~ 1,05..1,40

Aenv ~ 1,00...1,03


Geosynthetics and special foundations

Current and potential applications

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Access roads and working platformsvalidation of global stability of embankments in connection with ground improvementPiled embankment raft foundationDesign and execution of geotextile encased columnsTemporary formwork preventing excess consumption of concreteReduction of negative skin frictionDewatering of sludge or containment of sludge


Agenda

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HUESKER SYNTHETIC


Access Roads

Working Platforms

Piled Embankment


Fabric Containment



Access Roads

31


Base reinforcement

Parameters to consider

Geosynthetic:

biaxial vs. uniaxialstrain vs. strengthinstallation damageinterlocking

reinforcing

filtration

separation

drainage

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Base reinforcement

Further parameters… reinforcement

filtration

separation

drainageconsolidation / pore water

pressure

compaction / granular material

loading

…

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Base reinforcementMechanisme and relevant parameters

Tensile stiffnessInteraction soil / reinforcementInterlockingOpening sizeWater permeabilityRobustness

Load distribution

Membran action

Separation / filtration08.01.2016 34


Base reinforcementThe required base-course thickness can be estimated using empiric design data

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Agenda

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HUESKER SYNTHETIC


Access Roads

Working Platforms

Piled Embankment


Fabric Containment



Working Platforms

37


Working platforms

Typical Loading and arrangement for load distribution

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Working platforms

Current design approaches

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BR 470EBGEO : 2010

SVG

DIN EN 791:2010-01MeyerhoffGiroudKleih…


Working platform

Support us in research!

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Prof. Moormann (Stuttgart University)

To answer questions like:

non linear stress distributionDynamic ladingModel „two layer soil system“Include reinforcement


Agenda

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HUESKER SYNTHETIC


Access Roads

Working Platforms

Piled Embankment


Fabric Containment



Piled Embankemnt

42


Piled embankment with basal reinforcement

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Piled embankment

Design procedure (EBGEO, CUR)

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Piled embankment

Market

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Design guidance availableAccepted solution from clients like e.g. German Railway (DB-Netz AG)

Future challanges:Optimize No. of vertical bearing members // strength of reinforcementOptimize design and execution processFind design methode for triangular pattern of vertical bearings


Agenda

08.01.2016 46

HUESKER SYNTHETIC


Access Roads

Working Platforms

Piled Embankment


Fabric Containment




47


Alternative foundation system

Geotextile encased columns – Ringtrac®

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Geotextile encased columns

characteristics

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Suitable for very soft soils (su < 15 kPa)

Fast construction of high embankments with no danger of bearing failure

System is highly adaptable to local conditions and loads

Reduced settlements and accelerated consolidation


Installation techniques

Displacement

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Replacement

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Vibro float

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Agenda

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HUESKER SYNTHETIC


Access Roads

Working Platforms

Piled Embankment


Fabric Containment



Fabric Containment

54


Fabric containment for soil anchors or piles

Motivation

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Limit loss of cement mortar during grouting or anchors / piles in karsticsoils / fractured rockPrevent hydraulic colaps during grouting of anchors / piles in soft soils


Fabric containment for soil anchors and piles

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Ref. : Spesa

Concept



Rock anchors

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Ref. : Haka Gerodur



Containment forbored piles

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Typical requirements for containment

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Max. diameter during installation: 100 mm… 180 mmTo be defined / customized:

Max expected. filling pressure under working conditionsDesired permeability of fabricExpansion ratio

Required strength Raw material Opening size Confection diameter Required length


Incomat®Standard

-sealing-protection-Constant thickness

Incomat®Flex

- erosion protection- filter points

-Rough surface

Incomat®Crib

- vegetative erosion protection

Incomat®Filterpunkt

- erosion protection- many filterpoints

Incomat® - double layer fabric mattress

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Incomat mattress

fabric

fabric

spacer

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Incomat standard for sealing or protection

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Incomat®

Alternativ applications

Pipe protection and uplift protectionBallast and protection of geomembranes

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Incomat®

Pipe protection

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Agenda

08.01.2016 65

HUESKER SYNTHETIC


Access Roads

Working Platforms

Piled Embankment


Fabric Containment




66


System configuration

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SoilTain Tube Dewatering

Features

Optimization of application through resource-efficient tube sizesRecirculation of water, e.g. as process waterSludge encapsulation prevents rewettingVery high filling capacityLow energy requirementStraightforward installation

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Application example

Key data

100,000 m3 in-situ sludge volume345,000 m3 dredged volumeSuction dredger with a capacity of 10,000 m3/day

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System comparison on capacity

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Dredger operation: 10 h/day


Time comparison for complete dewatering

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Maschine employment

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Chamber filterpress

Belt filterpress

Centrifuge

30

20

10

Number ofmachines

22

30

12

Number of machines required to match SoilTaindewatering speed


Cost comparison

Relevant costs

Labout costsConstruction site staff for the whole dewatering process

Asset costsMaschines (Lease or Buy)Tubes

Operating costsMaintenanceConsumables (Energy, Polymers etc.)

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Cost comparison

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Costs (in Mio. €) for 100,000 m³ in situ sludge

3,8 3,5 2,8 2,4 1,9


Performance comparison

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++ Very good + Good • Neutral - Poor -- Very poor

SystemFactor

Water quality • -- • • •

Low maintenance intensity ++ ++ -- - --

VR/DS + - ++ + ++

Mobility ++ -- • • •

Capacity ++ ++ -- - -

Low investment + ++ - - -

SoilTain Dredge dump Chamber filter press Belt filter press Centrifuge

Permanent storage ++ ++ -- --

Low space requirement • -- ++ ++ ++

--

Low energy consumption ++ ++ - - --


High-flow dewatering


Summary - Geotextiles in special foundations

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Geosynthetics product groups Geosynthetics offer potential for new application areas

Base reinforcement: a fewrelevant paramters to consider

Stress distribution and high strengthfor working platforms

Piled Embankment: accepted slutionsand a few market challenges

Geotextile encased columns asan alternative foundation system

Double layer fabric mattres for soilanchors, piles and pipe protection

Dewatering of sludge with thehigh performance system SoliTain®


Summary - Geotextiles in special foundations

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HUESKER offers reliable high quality products

Wide range of technologies and raw-materials

Partner for development and project phase

Excellent network

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