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Midl d C l GMidland Canal GermanyMidland Canal, Germany

1992 nonwoven1992

sand ballastsand ballast

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40 years ago 30 years ago40 years ago 30 years agoy g y g

40 Th d i 1980 Th i t d ti f th 1992 W ld id i t til40 years ago: The common design 1980: The introduction of the cargo 1992: Worldwide unique geotextile40 years ago: The common designf b k t ti t f

1980: The introduction of the cargol “E hi ” (L/B/D 85

q git d l t T fi ® B 813of bank protection systems for vessel “Europe ship” (L/B/D = 85 m composite development – Terrafix® B 813of bank protection systems for

i l d t t ffi i tvessel Europe ship (L/B/D 85 m/ 9 5 / 2 5 ) d i b

p pd t d f t dl h dinland waterways was not sufficient / 9 5 m / 2 5 m) caused erosion by sandmat made of two needle-punchedinland waterways was not sufficient

d hi h f f i l d/ 9.5 m / 2.5 m) caused erosion byd d hi i d d

pith d b ll t b tdue to higher performance of inland drawdown ship-induced waves nonwovens with sand ballast betweendue to higher performance of inland

ldrawdown, ship induced waves,

fl (fl d i d Allcargo vessels return flow (flow due to carrier and cover nonwoven. Allcargo vessels. return flow (flow due to) t dl h d t iddisplacement) and propeller wash components are needle-punched to providedisplacement) and propeller wash components are needle punched to provide

hi h h t th t i i(flow due to propulsion) a high shear strength transmission on(flow due to propulsion). a high shear strength transmission onl f t i t ll ti Ad t thslopes for wet installation. Advantage: theres opes o e s a a o d a age e e

i d f f t f ll i l1983: Considering the practical is no need for a fast following armour layer1983: Considering the practical s o eed o a ast o o g a ou ayei t ll ti b ll t d hi h h d liexperiences gained from the installation as ballast due high hydraulicexperiences gained from the installation as ballast due high hydraulict bilit t t f b t 0 8 /1967 Midland Canal sites in 1983 the stability up to currents of about 0.8 m/s.

NAUE: Terrafix 750 Terrafix 1000 1967 Midland Canal sites, in 1983 the stability up to currents of about 0.8 m/s.NAUE: Terrafix 750, Terrafix 1000

regulations MAG (Code of Practice U il d ll T fi ® filregulations MAG (Code of Practice Until today all Terrafix® filter nonwovensUse of Geotextile Filters on

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Waterways) and TLG (Technicalperform their task without any problem and

f f ( )Waterways) and TLG (Technical with a lifetime of up to 40 years (!) withDelivery Terms for Geotextile

with a lifetime of up to 40 years (!) withDelivery Terms for Geotextile nearly no maintenance costsFilters) were published by the

nearly no maintenance costs.Filters) were published by the Inventive genius venturesome and theFederal Waterways and Research

Inventive genius, venturesome and theFederal Waterways and Research ability to assert oneself shown by theInstitute (BAW)

ability to assert oneself shown by theInstitute (BAW). Federal Waterways Directorates the( ) Federal Waterways Directorates, the

construction companies and theLater with RPG the Guidelines for

construction companies and theLater with RPG the Guidelines for geosynthetics' industry which took part in theTesting Geotextile Filters followed

geosynthetics industry which took part in theTesting Geotextile Filters followed development of the Midland Canal formedgwith fundamental test requirements

development of the Midland Canal formedwith fundamental test requirements the basis for 40 years of successfulqconcerning abrasion resistance

the basis for 40 years of successfulconcerning abrasion resistance, application of geotextile filters in the form ofgfiltration (static flow as well as

application of geotextile filters in the form offiltration (static flow as well as needle-punched nonwovens in revetment(turbulent flow) or dynamic puncture

needle punched nonwovens in revetmentturbulent flow) or dynamic puncture systems installed at the Midland Canal) y presistance for meeting adequate

systems installed at the Midland Canal,resistance for meeting adequate Germanyg qrobustness against dumping of

Germany.robustness against dumping ofg p garmour stones These regulationsarmour stones. These regulations The technical affinity towards the grain filter

1967g

until today belong to the standardThe technical affinity towards the grain filter,

1967 until today belong to the standard together with an area-wide controlled1967 y gliterature in hydraulic engineering

together with an area wide, controlledliterature in hydraulic engineering. installation of a tailor-made product at they g g installation of a tailor-made product at the

underwater slopes to be protected and the1967: Worldwide pioneering underwater slopes to be protected and the1967: Worldwide pioneering1986 integration into the ecosystem document theapplication of geotextile filters 1986 integration into the ecosystem document theapplication of geotextile filters 1986

predominance of this construction methodmade of nonwoven for canal works predominance of this construction method.made of nonwoven for canal worksToday approximately 200 km of stable andat the Midland Canal Germany Today approximately 200 km of stable andat the Midland Canal, Germany.nearly maintenance-free revetments at thenearly maintenance-free revetments at theembankments of the Midland Canal carried

A f d i f hiembankments of the Midland Canal carried

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out with geotextile filters in the form ofworldwide development was placed needle-punched nonwovens are anworldwide development was placed

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with the first installation of a filter impressive successwith the first installation of a filterC

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The alternative to grain filter layer Together with the progresses whichNAUE GmbH & Co. KG

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