监视澳大利亚最大的运输项目

Author:Spatial Source

“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 TM50monitoring stations.

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，合资企业Land SurveysandGeomotion Australia。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。

“Thankfully, I’m really satisfied with the Leica instruments we have,” says Szabolcs Fajcsi, Instrumentation and Monitoring Manager with GLS Monitoring.

“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?’”

“你必须,really quick, and ready to make a call before something bad happens,” he says. “But the instruments we use make it really easy to give a reliable answer so that when the client needs you to make the call – you can make the call.”

Those quick calls are made possible by a robust and complex monitoring system the GLS Monitoring team developed with the help of their partners at distributorCR Kennedy。

Fig 2. The team installed more than 4,500 prism reflectors across the tracks and station platforms.

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。”

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

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.

“So, for example, on the track you might have prisms three metres apart, but from the instrument’s field of view they look very close – the Leica TM50 is pretty superior when it comes to being able to recognise each prism,” he says.

“ TM50S的另一个主要因素是，我们知道它们是在非常艰难的环境中表现良好的耐磨仪器。

GLS监视的Szabolcs Fajcsi非常了解中央车站在设备和团队上的要求如何。

“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。

“It’s usually pretty easy and quick to just take the unit to CR Kennedy where they are able to give us a quick calibration or solution for the problem, usually with just a couple days turnaround,” he says.

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。

That is why the team had CR Kennedy supply them with an Amberg GRP 1000 Rail Trolley, which they used to conduct a base survey of the real track conditions and geometry at the start of the project.

由于中央车站的动态性质，仪器和监测经理Szabolcs Fajcsi表示，该手推车仍倾向于每月使用几次，超过一年的项目。

Fajcsi说：“我们从轨道八的轨道一直到23赛道的监视 - 总共几乎是四公里的轨道。”“如果轨道上有某种维护，那么我们需要进行手推车调查，以便能够提供自动的轨道几何监测。”

Land Surveys have purchased at least two more of the trolleys, seeing the value they can bring in projects across Australia including a major rail project for mining giant BHP in the Pilbara and a commuter rail job in Perth.

But Fajcsi is satisfied keeping his focus trained on the massive construction project underway at Central Station and his role in making sure it goes smoothly.

他说：“这真是太神奇了。”“他们在现场直播下进行的不中断的发掘确实真是太神奇了。”

“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。”

Cr Kennedy提供的信息。