How Warner Land Surveys uses the Leica Nova TS60

Author: Andrew Griffin

Warner Land Surveys Ltd(Warner Surveys), founded于1979年,是英国领先的土地和女士eering surveying consultants. Having delivered over 11,000 individual projects over its 40-year history, Warner Surveys focus has always been on customer service, and quality data collection and delivery. The company strives to be the ‘go-to’ providers forquality调查。随着公司的发展，它迅速开发了建筑和工业部门，以支持不断发展的客户群。

“From our roots as a small land survey company to where we are now, we continue to provide a consistent, cost-effective service to support our clients with comprehensive ‘end-to-end’ solutions for all their survey requirements, from project concept to completion,”says David Hutson, managing director at Warner Surveys.

Three applications, one total station

The land and engineering surveying company uses a range of techniques and state-of-the-art measuring and positioning technology to ensure every project is carried out with precision, accuracy and the most cost-effective and safe survey solution. Warner Surveys’ go-to tool for project control network survey, verified ‘View Surveys’ and 3D movement monitoring is theLeica Nova TS60 - 世界上最准确的总站.

“The Leica TS60 is the instrument Warner Surveys turn to for projects requiring an additional level of accuracy assurance. Being a 0.5-second instrument makes it ideal for manual monitoring schemes, and the surveying of large survey control point networks, particularly in the rail environment. We have also found an additional use for the TS60’s telescopic imaging capabilities in verified view surveys,”explains Hutson.

The examples below explain how using the TS60 Warner Surveys:

• Performed a control survey with the highest accuracy to verify the control point network guiding the redesign of the Kings Cross station in London;

• 通过提供调查以产生“经过验证的观点”，帮助其客户准确地可视化其新项目或开发的外观；

• Movement monitoring schemes for the 3D monitoring of façades or old buildings.

Control network survey for Kings Cross Station remodelling project

Countries are adapting and expanding their railway systems to mobilise the increasing urban growth and keep the economy on the move – London is no exception.

As part of Network Rail multi-million-pound programme to upgrade the East Coast Main Line in the UK, London’s Kings Cross station aged infrastructure will be replaced and redesigned. The plans to review the station include re-laid the track in a new layout, with a disused tunnel being reopened, allowing for six tracks into the station instead of the current four.

Warner Surveys were commissioned in early 2019 to undertake the reinstatement and re-survey of the existing survey control point network on the Kings Cross Remodelling project. Surveying this railway line requires capturing data with the highest precision and standards in the shortest amount of time.

“由于这是一项铁路环境控制调查，需要非常高的准确性，因此我们立即选择了TS60进行所有遍历和控制点观测,” says Chris Gilks, Warner Surveys lead surveyor on Kings Cross Remodelling project.“It is the ideal choice for a large-scale control survey as it utilises the instrument’s strengths. The TS60 allows us to observe and record ‘rounds’ or ‘sets of angles’ to a 0.5 second horizontal and vertical accuracy, and as a result, provides quality data sets, which ensure we achieve the required accuracies necessary to meet demanding Network Rail standards.”

Accuracy is an important benefit, but this is not the only advantage of using the TS60 for control network surveys. During the Kings Cross Remodelling project, in addition to ground control observations, there is also a requirement to verify and coordinate several wall-mounted prisms.

“With projects such as this, with high numbers of targets, when utilising the Leica Captivate ‘Sets of Angles’ app, it was often necessary to observe 12 or more different ground and wall targets in face left and right for seven complete rounds. For example; for 12 targets this would equate to 168 control observations for a single set up,” explains Gilks.

这个过程可能会非常要求，尤其是在溢价和时间溢价的铁路环境中。

“The TS60 is well suited to this task due to its Piezo technology endless drives as opposed to the standard motorised drives. The increased rotation speed of the TS60 significantly reduces the time to observe such large sets of angles so, in turn, increases our productivity per hour on-site and ultimately reduces costs for Warner Surveys and our client,”添加吉尔克斯。

Verified view surveys

Warner Surveys has been a long-time provider of ‘Verified View’ surveys for Accurate Visual Representations (AVR). AVR, photographic images showing placed accurately within a new development in situ, are used by architects and developers, usually for planning purposes, to show how a future scheme might look. A photograph can be accurately placed and rendered into a 3D model to visualise a prospective site, collecting GPS and total station measurements.

华纳的调查为客户或生产AVR的公司提供调查数据，以促进3D数字建模。专家调查并记录大量照片参考点和相机位置，以确保高度准确性。然后将团队收集的调查数据导入到客户的3D数字模型中，从中可以从中渲染提出的方案的图像。

“The TS60, with its image capture capability, allows us to provide our clients with images of the recorded or surveyed reference points. It adds a telescopic image record of the point surveyed which facilitates post-processing and can be supplied to the client in order to confirm or prove the point surveyed,”华纳调查的高级测量师詹姆斯·华莱士（James Wallace）备注。

3D运动监控

在结构状态上的准确和可靠的定位对于做出快速而明智的决策和对潜在问题的反应至关重要。

It is a commonplace now for refurbishment works to require that the existing façade is maintained, whilst the internal structure is demolished and rebuilt to suit a more modern design. In these instances, the appointed design/structural engineers may request the installation of a monitoring scheme to monitor a façade or structure with millimetre accuracy.

Warner Surveys has monitored old buildings and façades using the TS60, as the robotic total station can determine its own position and orientation observing the control points set by the team.

“当华纳调查开始建立这些监视方案之一的过程时，我们对参考控制和监视目标进行了三组角度观察，并在三个设置的基础读数位置上进行了监视目标。TS60在此基础读数中确实进入了其元素，这是由于其速度在左侧和右面之间的速度以及转动观察众多监视点时的速度。压电技术直接驱动器将TS60大大提高了AT的速度，可以采用监视方案，从而使我们能够更快地处理和将结果交付给客户的结果，”concludes Peter Pearson, monitoring manager at Warner Surveys.