Inspecting the surface of a giant wastewater tunnel

Cities worldwide are adapting their infrastructure to cope and plan for the water needs of people and the environment. New Zealand’s largest wastewater project is underway to ensure the supply of the most vital resource over the next hundred years while improving the environmental outcomes and building the resilience of the current waste pipelines.

的水处理中心l Interceptor Tunnel for this project has reached an exciting stage. The teams’ giant new Tunnel Boring Machine [TBM], built in Germany, Hiwa-i-te-Rangi, reached 1,100m of excavation.

The main contractor, Ghella Abergeldie Joint Venture (GAJV), will take six years to build the Central Interceptor, with most construction work underground. The 190m long TBM will bore through the earth’s substrate and lay segments of the tunnel as it goes.

With a planned length of 14.7km, the new underground tunnel is on its way to being the country’s largest wastewater tunnel. Visible above-ground construction will be contained to the 16 sites where vertical shafts will be built and connections made to local sewer networks and overflow points.

Māngere和May Rd A轴A的第一批轴已经在建设中很好。Māngere轴深40m，隔膜壁从-50到-54m的地下延伸，在新西兰历史上创造了最深的隔膜墙。May Rd轴A的直径较小，深约67m，而较低的40m衬有衬砌的衬套以稳定墙壁。

照片：laiCh Infinity Office软件中显示的Leica Nova MS60捕获的五月垂直轴的频段扫描点云数据]

Comparing Surfaces of Scanned Structures

Ghella Abergeldie调查团队从事该项目的工作配备了最新的Leica Geosystems技术，包括新的Leica Nova MS60多阶段，具有3D激光扫描功能的强大机器人总站。新MS60最有力的功能之一是Inspect Surfaces应用程序，该应用程序在全球范围内被测量师流行，是比较扫描功能表面的宝贵工具。

The survey team positioned the Leica MS60 at the bottom of the vertical shaft using the Resection setup option inLeica Caintivate Field软件检查建筑。然后，他们使用Inspect表面应用程序使用“热图”将扫描与轴设计进行比较，这显示了设计与真实结构之间的不一致之处。

This enabled GAJV surveyors to communicate directly with the construction team on-site and in real-time to immediately identify surface inconsistencies.

“The Inspect Surfaces App was just what we were looking for. The ability to directly compare reality with design in the field is of huge benefit. The Leica MS60 is our “go-to” instrument, and we are looking forward to using it on different stages of the tunnelling project.”

莱斯·沃利（Les Whalley）- 中央拦截器项目矿山测量师

The Ghella Abergeldie Survey Team has also taken delivery of severalDigital Levelswith invar staffs,Leica Geosystemsrobotic total stations, andcontrollers有了优势，即在同时捕获数据。Leica Infinity Office软件使团队可以组合和处理数据集以完成质量检查检查。

As this project progresses,Bryan Claridgeand the team from Global Survey New Zealand will provide ongoing technical support and assistance to this highly complex and crucial project.

A Long-Term Strategic Infrastructure Project

There is no doubt that theCentral Interceptor Project对于奥克兰和该国有史以来最大的一项至关重要的项目。它是由水库明确设计的，可以在奥克兰地区提供更好，更有效的废水管理并提供未来的增长。

Historically older stormwater pipes have been overwhelmed in heavy rain and overflowed into the city’s natural waterways. Over six years, the Central Interceptor tunnel will be built to help make Auckland’s waterways cleaner.

中央拦截器隧道将从灰色林恩（Gray Lynn）到Māngere废水处理厂的地下延伸。它将在路线上有几个连接的下水道和轴，以收集和将废水转移到隧道中。完成后，它将是新西兰历史上最长的废水隧道。

Ghella Abergeldie has more than 150 years experience with tunnelling and wastewater projects of this size across the globe.