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.

该项目的水库中央拦截隧道已经达到了一个令人兴奋的阶段。这些团队的巨型新隧道无聊机[TBM]建于德国Hiwa-i-i-te-rangi，达到了1,100m的开挖。

主要承包商Ghella Abergeldie合资企业（GAJV）将需要六年的时间才能建造中央拦截器，其中大多数建筑工作地下工作。190m长的TBM将在地球的基材上钻孔，并在隧道的沿线层面上铺设。

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.

The first shafts at Māngere and May Rd shaft A are already well under construction. The Māngere shaft is 40m deep with a diaphragm wall extending from -50 to -54m underground, creating the deepest diaphragm wall in New Zealand history. While May Rd shaft A has a smaller diameter, some 67m deep, the lower 40m is shotcrete-lined to stabilise the walls.

Photo: Band scan point cloud data from May Rd vertical shaft captured by the Leica Nova MS60 displayed in Leica Infinity office software]

比较扫描结构的表面

The Ghella Abergeldie Survey Team working on this project are equipped with the latest Leica Geosystems technology, including the newLeica Nova MS60 MultiStation, a powerful robotic total station with 3D laser scanning capability. One of the most powerful features of the new MS60 is the Inspect Surfaces App, which is proving popular with surveyors worldwide as a valuable tool to compare the surfaces of scanned features.

调查团队使用切除设置选项将Leica MS60定位在垂直轴的底部Leica 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.

“检查表面应用程序正是我们想要的。将现实与现场设计直接比较的能力具有巨大的好处。Leica MS60是我们的“首选”工具，我们期待在隧道项目的不同阶段使用它。”

Les Whalley– Mine Surveyor, Central Interceptor Project

Ghella Abergeldie调查团队还接管了几个Digital Levels与Invar员工一起Leica Geosystems机器人总站亚博5分钟快三， 和控制器with the advantage that data is captured in Captivate on both.Leica Infinity Office软件enables the team to combine and process data sets for QA checks to be completed.

随着该项目的进行，Bryan Claridge新西兰全球调查的团队将为这个高度复杂和关键的项目提供持续的技术支持和帮助。

长期战略基础设施项目

There is no doubt that the中央拦截器项目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.

The Central Interceptor tunnel will run underground from Grey Lynn to the Māngere Wastewater Treatment Plant. It will have several linked sewers and shafts along the route for collecting and transferring wastewater into the tunnel. Once complete, it will be the longest wastewater tunnel in New Zealand history.

Ghella Abergeldie拥有150多年的隧道和废水项目经验。