监视澳大利亚最大的运输项目

作者：空间来源

“经过测试，尝试和经过证明的” Leica仪器和软件突出了中央车站悉尼地铁升级期间监视轨道和平台的复杂系统。

Fig 1. The team utilised 28Leica Nova TM50监测站。

随着澳大利亚有史以来最大的运输项目悉尼地铁的开挖和建筑桶，一支小而重要的工程师团队一直在悄悄地驾驶人群和隆隆的火车，这些火车定义了悉尼的中央车站。

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.

That important job was awarded to the team atGLS监视, a joint venture betweenLand SurveysandGeomotion澳大利亚。由于有一座标志性的建筑物和线路上许多骑手的安全性，团队知道设备必须精确，坚固，以承受繁忙车站的挑战。

“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视系统，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CR Kennedy。

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.

The team have employedLeica的GeomosMonitoring 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是世界上最广泛使用的软件之一，我们熟悉其数据结构以及如何提取所需的信息，”土地调查的国家监测经理Drew Coulthard说。“归根结底，地球素会经过测试，尝试和证明。”

图3. Geomos监视软件可以保持警惕，并在检测到移动的情况下警报。

Coulthard说，该团队需要从他们为该项目选择的每种工具中得到证明的精确度。

“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.

“Well, we have constant maintenance, mainly because with all these prisms on the tracks and the dust at the station, the prisms get dirty every two weeks or so,” Fajcsi says. “So, it’s especially challenging sometimes to find a timeframe where you can jump on the tracks and clean and reinstate those targets with how busy the station can be,” he says.

Fajcsi说，GLS监测团队即使在不利条件下，Leica TM50监测站也没有任何问题。但是，在很少有单位需要注意的情况下，这是一个真正的事物，再加上肯尼迪CR的支持。

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。”

德鲁·库尔萨德（Drew Coulthard）进行了土地调查，他说，中央站的年龄和复杂性使其成为一个特别令人兴奋但复杂的地点，可以在建造和监视。换句话说，多年来，几乎所有的现有，重要的基础架构以及几乎所有的一切都在移动。

图4. Amberg GRP 1000导轨手推车提供自动轨道几何监控。

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环境，要进行监视，这只会使我们继续前进。”

Information provided by CR Kennedy.