Mas­sive con­crete lin­ings com­plete

Central Leader - - NEWS - By KA­RINA ABA­DIA

The fi­nal con­crete piece in the Water­view tun­nel puz­zle is ready to be in­stalled.

A pur­pose-built fac­tory in East Ta­maki cast the last of 24,000 seg­ments be­ing used to line the Water­view Con­nec­tion pro­ject’s mo­tor­way tun­nels on June 26.

NZ Trans­port Agency Auck­land state highways man­ager Brett Glid­don says the lin­ings have been a key com­po­nent in the de­sign and con­struc­tion of the twin tun­nels.

‘‘This fac­tory has done a first rate job con­sis­tently de­liv­er­ing such a big quan­tity on time,’’ he says.

‘‘This has made a sig­nif­i­cant con­tri­bu­tion to keep­ing us well on tar­get for the pro­ject to be com­pleted in De­cem­ber 2016 and the planned open­ing to traf­fic in early 2017.

‘‘The lin­ings for these tun­nels have needed to be ex­tremely pre­cise with tothe-mil­lime­tre pre­ci­sion so they fit per­fectly to­gether in­side the tun­nels.

‘‘They’re also in­cred­i­bly strong, durable enough to with­stand 100 years of traf­fic use,’’ Glid­don says.

Each 10.5 tonne seg­ment is one of 10 which make up 2414 rings of con­crete lin­ing. Each ring is 2 me­tres wide and 14m in di­am­e­ter.

The seg­ments are de­liv­ered to the pro­ject site in Owairaka where the tun­nel bor­ing ma­chine known as Alice has been in­stalling the seg­ments at a rate of six lin­ings ev­ery 24 hours that the ma­chine is op­er­at­ing.

Al­liance pro­ject man­ager John Bur­den says the fa­cil­ity has pro­vided op­por­tu­ni­ties for skill de­vel­op­ment.

‘‘In ad­di­tion to pro­duc­ing the tun­nel seg­ments on time and un­der bud­get, the team have worked hard with the lo­cal com­mu­nity to hire, train and de­velop a work­force that is now able to move on to higher skill jobs.’’


The last seg­ment of Water­view’s con­crete tun­nel lin­ing is ready to be put in place.

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