监视Australia's Biggest Transport Project

作者：空间来源

‘Tested, tried and proven’ Leica instruments and software highlight the complex system monitoring the tracks and platforms during Central Station’s Sydney Metro upgrade.

图1.团队利用28Leica Nova TM50监视站。

As excavation and construction barrel ahead on the Sydney Metro, Australia’s biggest ever transport project, a small and vital team of engineers have been quietly navigating the crowds and rumbling trains that define Sydney’s Central Station.

They are using state of the art equipment to monitor the tracks and existing infrastructure to make sure the massive works necessary to bring new Metro trains to the 120-year-old Sydney landmark, aren’t endangering the more than 100,000 daily riders that already shuffle through.

这项重要工作被授予GLS Monitoring, a joint venture betweenLand Surveysand澳大利亚的地貌. With an iconic building and the safety of so many riders on the line, the team knew the equipment had to be precise and sturdy enough to withstand the challenges of the busy station.

“值得庆幸的是，我对我们拥有的Leica仪器真的很满意，” GLS监控的仪器和监测经理Szabolcs Fajcsi说。

“We don’t get the call often, but for example the contractor might ring up on a Sunday night saying, ‘OK, can you just please check the south end of track 16 to see if there are any movements on the track that will cause us to stop the trains?’”

他说：“您必须非常非常快，准备好在发生不好的事情之前打电话。”“但是我们使用的仪器非常容易给出一个可靠的答案，以便当客户需要您打电话时 - 您可以打电话。”

通过强大而复杂的监控系统，GLS监控团队在分销商的合作伙伴的帮助下开发了这些快速呼叫肯尼迪爵士.

图2.团队在轨道和车站平台上安装了4,500多个棱镜反射器。

They built a massive network that includes 28 Leica Nova TM50 monitoring stations pointed at more than 4,500 prism reflectors installed across the tracks and station platforms, along with an assortment of other geotechnical sensors.

团队雇用了Leica’s GeoMoS监视Software to keep a watchful eye on the trove of data coming in round-the-clock and provide alerts in case it detects any movement outside acceptable limits.

“GeoMoS is one of the more widely used pieces of software across the world, and we are familiar with its data structure and how to extract the information we need,” says Drew Coulthard, National Monitoring Manager with Land Surveys. “When it comes down to it, GeoMoS is tested, tried and proven.”

Fig 3. GeoMoS Monitoring Software keeps a watchful eye around the clock and alerts in case movement is detected.

Coulthard says the team needed proven precision from each instrument they chose for the project.

“One of the key factors with the Leica Nova TM50s is their ATR (automated target recognition) ability, especially considering all the densely located prisms required for this job,” he says.

他说：“因此，例如，在赛道上，您可能会有三米的棱镜，但是从乐器的视野中，它们看起来非常接近 - 当涉及到每个棱镜时，Leica TM50非常出色。”

“And another major factor with the TM50s is that we know that they are really good hard-wearing instruments that perform well in a pretty tough environment.

”GLS Monitoring’s Szabolcs Fajcsi knows all too well how demanding Central Station can be on both the equipment and the team.

Fajcsi说：“嗯，我们有不断的维护，主要是因为所有这些棱镜都在车队和车站的灰尘上，棱镜每两周左右就会变得肮脏。”他说：“因此，有时候找到一个时间范围，您可以在轨道上跳跃并清洁并以车站的繁忙来恢复这些目标是尤其具有挑战性的。”

Fajcsi says the GLS Monitoring team have had very few issues with the Leica TM50 monitoring stations even with the adverse conditions. But, in the very few instances where they units have needed some attention it was a real plus having the CR Kennedy support available at short notice.

他说：“通常将单位带到Cr Kennedy，他们可以为我们提供快速校准或解决方案，通常只需几天的时间，这通常很容易快捷。”

Drew Coulthard with Land Surveys says the age and complexity of Central Station make it an especially exciting, but complicated, site to build at and to monitor. In other words, there is a lot of existing, vital, infrastructure and just about everything has moved over the years – even the tracks.

Fig 4. The Amberg GRP 1000 Rail Trolley provides automated track geometry monitoring.

这就是为什么团队让肯尼迪CR为他们提供Amberg GRP 1000铁路手推车的原因，他们用来对项目开始时对实际轨道条件和几何形状进行基础调查。

Because of the dynamic nature of Central Station, Instrumentation and Monitoring manager Szabolcs Fajcsi says the trolley still tends to get used a few times a month, more than a year into the project.

“We have the monitoring from track eight all the way to track 23 – that is pretty much four kilometres of track in total,” Fajcsi says. “If there is some sort of maintenance on the tracks then we need to do a trolley survey to be able to provide automated track geometry monitoring.”

土地调查已经购买了至少两辆手推车，看到了他们可以在澳大利亚带来的项目的价值，包括一项用于矿业巨头必和必拓的主要铁路项目，以及珀斯的通勤铁路工作。

但是Fajcsi感到满意的是，他的专注力对中央车站的大规模建筑项目进行了训练，并在确保其顺利进行方面的角色。

“This is pretty amazing,” he says. “The amount of excavation that they are doing right under the live tracks without any interruption on the traffic really is just amazing.”

“这是一个非常具有挑战性的environment to do monitoring in, and that just keeps us going.”

Information provided by CR Kennedy.