How Warner Land Surveys uses the Leica Nova TS60

Author: Andrew Griffin

华纳土地调查有限公司（华纳调查），建立in 1979, is one of the UK’s leading land and engineering 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 forqualitysurveys. As the company evolved, it quickly developed both construction and industrial departments to support an evolving client base.

“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

土地和工程测量公司使用一系列技术和最先进的测量和定位技术，以确保每个项目都以精确，准确性和最具成本效益和最安全的调查解决方案进行。华纳调查的项目控制网络调查，经过验证的“查看调查”和3D运动监控的工具是Leica Nova TS60 – World’s most accurate total station.

“ Leica TS60是Warner的仪器调查转向需要额外准确保证的项目。作为0.5秒的乐器，它是手动监视方案的理想选择，以及对大型调查控制点网络的测量，尤其是在铁路环境中。我们还发现了在经过验证的视图调查中，TS60的伸缩成像功能的额外用途，”赫特森解释说。

下面的示例说明了如何使用TS60华纳调查：

• 进行了最高准确性的控制调查，以验证控制点网络指导伦敦国王十字架的重新设计；

• Helps its clients visualise precisely how its new project or development will look like by providing surveys to produce ‘verified views’;

• 3D监视立面或旧建筑物的移动监控方案。

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.

作为网络的一部分铁路数百万英镑的总结mme 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.

华纳调查于2019年初进行了调查，以进行国王交叉改建项目现有的调查控制点网络的恢复和重新调查。调查这条铁路线需要在最短的时间内以最高的精度和标准捕获数据。

“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”，华纳（Warner）对国王交叉改造项目的首席测量师克里斯·吉尔克斯（Chris Gilks​​）说。“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，”吉尔克斯解释说。

This process can be very demanding on time, especially in the rail environment where access and time on site are at a premium.

“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,”Gilks补充道。

验证的视图调查

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.

Warner Surveys provide its clients, or the company producing the AVRs, the survey data to facilitate 3D digital modelling. Experts survey and record a large range of photograph reference points and the camera locations to ensure a high level of accuracy. The surveyed data collected by the team is then imported into the client’s 3D digital model from which render images of a proposed scheme can be rendered.

“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 movement monitoring

Accurate and reliable positioning on the status of structures is crucial to make fast and informed decisions and react to potential problems.

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.

“当华纳调查开始设置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观察，并在基本读数的三个设置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大大提高了以下速度，可以采用监视方案，这使我们能够更快地处理和交付结果，”concludes Peter Pearson, monitoring manager at Warner Surveys.