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Tunnel ing

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First LiningConsolidation &Reinforcement

Final Lining

Tunnels with TBM

Projects & Works

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Fibreglass reinforcement elements

These are extruded elements formed from glass f i laments and

polyester res in , of fer ing a mechanical performance s imi lar to steel ,

yet are s ignif icant ly l ighter to handle. They reinforce the excavated

face, and can easi ly be broken out when excavation continues. Hol low

pro f i les can a l so be g routed i f requ i red .

1 Tunnels C o n s o l i d a t i o n & R e i n f o r c e m e n t

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Concrete reinforcement

1 Tunnels C o n s o l i d a t i o n & R e i n f o r c e m e n t

Reinforcing concrete reinforced with

f ibreglass bars, makes future access

through that concrete much s impler ;

useful in tunnel junct ions and

temporary structures.

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P.e.r. Ground

2 Tunnels C o n s o l i d a t i o n & R e i n f o r c e m e n t

In problematic ground where achieving reinforcement or anchorage

performance is d i f f icu lt , P .e.r . Ground can be used; a sheath around

the reinforcement bar contains the in jected mortar, which compacts

the surrounding ground, improving the adhesion and resistance to

pul l -out. P .e.r . Ground also reduces grout loss and wash-out.

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Self-dril l ing bolts and steel anchors.These are used to contro l and/or reduce the

convergence of the excavated tunnel sect ion.

The reinforcement range comprises steel anchors,

post-tensioned f ibreglass bolts , sel f -dr i l l ing rock

bolts and high-strength steel bars.

2 Tunnels C o n s o l i d a t i o n & R e i n f o r c e m e n t

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Groutmaster High Performance Grout

Poor soi ls can be improved by the in ject ion of Groutmaster, a

mult i funct ion grout. I t is used to;

Reduce so i l permeab i l i t y

Cont ro l se t t lement and mi t igate l iqu i fact ion

Improve cohes ion o f g ranu lar so i l s

Reduce expans iv i ty o f cohes ive so i l s

Compensat ion g rout ing and vo id f i l l ing

2 Tunnels C o n s o l i d a t i o n & R e i n f o r c e m e n t

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Polyurethane resin

These chemical products are mixed before in ject ion to create a l ightweight

and expansive closed cel l foam that b locks the accidental inf low of water.

I t i s a l so wide ly used to f i l l the cav i t ies that somet imes fo rm o r wh ich are

encountered dur ing tunne l excavat ion work .

3 Tunnels C o n s o l i d a t i o n & R e i n f o r c e m e n t

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Drainage

To rapid ly reduce groundwater pressures at

depth, drainage p ipes can also be inserted into

the tunnel face and wal ls .

3 Tunnels C o n s o l i d a t i o n & R e i n f o r c e m e n t

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3 Tunnels C o n s o l i d a t i o n & R e i n f o r c e m e n t

In ject ion Pipes

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4 Tunnels P r i m a r y L i n i n g

B Zero Tondo Steel Arches

Fol lowing the f i rst excavation, B Zero Tondo can be used to

support the tunnel . These unique tubular steel arch r ibs are

f i l l ed wi th concrete in -s i tu and per fo rm bet te r than t rad i t ional

arch supports; fewer steel arches are needed, reducing costs

and increasing tunnel product iv i ty .

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Wirand Steel F ibresSteel f ibres enhance the performance of shotcrete,

improving the toughness, re inforcement performance and

increasi ng work safety . Special is ed Maccafer r i dosage

equipment is avai lable to accurately contro l the d ispensing

of f ib res in to the concrete mix o r batch ing p lant .

5 Tunnels P r i m a r y L i n i n g

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Plasticise rs andaccelerating admixtures

Superplast ic isers maintain

the workabi l i ty of shotcrete,

preserv ing i ts character ist ics

during transportat ion and

pumping.The accelerants Rocksi l (s i l icate)

and Apra l (a lka l i f ree ) acce le rate

the sett ing t ime, improving

adhesion to the substrate or

pr ior layers.

6 Tunnels P r i m a r y L i n i n g

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Tunnels F i n a l L i n i n g7

Concrete reinforcementusing Wirandsteel f ibres

Wirand steel f ibres are used to

structural ly re inforce the concrete

f inal l in ing and is poured or pumped

into formwork. As tradit ional

reinforcement can be reduced or in

some cases el iminated, product iv i ty

is increased and l in ing th ickness may

be reduced. Steel f ibre reinforced

concrete (SFRC) is more duct i le ,

tougher and less permeable than

t rad i t ional concrete .

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Tunnels F i n a l L i n i n g7

Polypropylene f ibr es forpassive f ire protection

Fibromac polypropyle ne f ibres,

mixed into the f inal l in ing concrete

provide passive f i re protect ion.

F ibromac s ignif icant ly increases

f i re resistance by reducing spal l ing

phenomena.

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Tunnels F i n a l L i n i n g8

Ceramic l iningsHigh qual i ty and large-s ized ceramic

panels are f ixed by adhesive to

the inner face of the concrete f inal

l in ing. This so lut ion provides greater

durabi l i ty of the s ide wal ls , better

luminosity and safety , and fast

and cost-ef fect ive maintenance.Various types of f in ish are avai lable,

depending on the architectural

requirements.

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Tunnels P r o j e c t s & W o r k s Highway 53 Puerto Rico9

Const ruct ion o f H ighway 53, Puer to R ico

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Tunnels P r o j e c t s & W o r k s High-Speed Railway Line Milan-Naples

Const ruct ion o f the sect ion betweenBo logna and F lo rence ( I ta ly )

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Tunnels P r o j e c t s & W o r k s A3 Motorway Salerno-Reggio Calabria

Modern isat ion and upgrad ing o f

the sect ion between Sa le rno andRegg io Calab r ia ( I ta ly )

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Tunnels P r o j e c t s & W o r k s A1 Motorway Milan-Naples

New Variante d i Val ico motorway sect ion.

Upgrading of the Apennine sect ion betweenBo logna and F lo rence ( I ta ly )

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Tunnels E x c a v a t e d w i t h T B M

Precast segments

WirandSFRC can replace some, or

in certain cases, al l of the tradit ional

steel re inforcement with in the precast

segments. F ibromac polymer f ibres

offer increased f i re resistance by

reduc ing spal l ing phenomena.

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Tunnels E x c a v a t e d w i t h T B M

Precast concrete segments

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Tunnels P r o j e c t s & W o r k s

L ine 9 is 43 km long and runs

from the El Prat airport in twodif ferent d irect ions, with 43

stat ions.

The f inal l in ing for the tunnel is

made of precast concrete, with a

combination of conventional steel

re in fo rcement and Wi rand steel

f ib res (FF1 and FF3) .The total product ion quantity

amounts to 450,000 m3 of f ibre

reinforced concrete. Maccaferr i

dosing systems have been

especial ly designed and instal led

in order to ensure precise f ibre

quant i t ies and qu ick batch ing .

Line 9 Metro Barcelona11

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Tunnels P r o j e c t s & W o r k s11 Hobsons Bay Sewer New Zealand

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Tunnels P r o j e c t s & W o r k s11 San Francisco Bay USA