Improving the railway infrastructure of a capital city

作者：Staff

With thousands of commuters into the capital city every day, additional trains into London are a plus to help with the heavy traffic congestion.

As part of the Brighton Mainline Upgrade Programme, an additional six trains per hour will be made available during the morning peak. Along with this, the programme would also see four additional services into London with a further two additional trains in 2043. Performance will also be improved through the segregation of flows and contribute toward additional train paths on the route.

Topographical surveys are required for this complex and extremely busy piece of London’s railway infrastructure. The programme provides the ideal time to upgrade to newer, faster and more efficient solutions for data capture.

Network Rail, the government entity in charge of the programme, turned to Atkins to perform the surveys.

重大升级

阿特金斯成立于1938年，是世界上最受尊敬的设计，工程和项目管理咨询公司之一。Atkins与来自公共和私营部门的不同部门和地区以及地方和国家政府的各个部门和地区的广泛客户紧密合作，提供了长期可信赖的合作伙伴关系，以创造一个通过实施思想来丰富生活的世界。

Atkins Rail Division, based in Croydon, Surrey, United Kingdom, has been using Leica Geosystems surveying equipment for almost 20 years. The decision was made last year to replace the majority of the consultancy’s trusted but aging fleet of Leica System 1100 and 1200 total stations and to add to the firm’s existing GNSS, digital levelling and traversing equipment with the latest Leica Captivate solutions.

This major upgrade saw a broad spread of instruments:

• 1 Nova MS60多阶段
• 7 Viva TS16I成像总站bob apple
• 4 Viva GS14 GNSS智能天线
• 10 Captivate CS20 controllers
• 2个CS35 CS35平板电脑
• 2 LS15 auto focus digital levels
• 8 full traverse kits

With the new portfolio, Atkins was ready to take on the important rail project.

Site limits and challenges

To enable the additional programme paths toward London Victoria and London Bridge, there was a requirement to segregate flows at Windmill Bridge Junction. It would support performance improvement on the route through the segregation of key train flows, which currently transfer reactionary delays across the other adjacent lines and the wider South London network.

为了在东克罗伊登（East Croydon）实现额外的火车停车能力，需要建造其他平台。除了安全地在Selhurst和Gloucester Road Junction之间提供12辆车的火车运营外，还需要基础设施来容纳Selhurst Spur上的12辆车火车。

As a result, feasibility options were developed to achieve these outputs. The options include:

• 风车桥交界处的等级分离，
• Extension of the Selhurst Spur
• Additional track between Windmill Bridge Junction and East Croydon
• East Croydon的另外两个平台。

据确定，在East Croydon站需要工作，以安全地提供所需的乘客进入新平台，并在大厅上提供足够的增加乘客容量。

“As with all railway topographical surveys, the limitations of site access and the nature of railway infrastructure constrains the way we conducted the survey,” said Matevz Groboljsek, Atkins Track Team project manager. “This was especially true on a project area of this scale and considering the complex junction and train routing available through the section of the infrastructure.”

Leica Captivate solutions helping the world of rail

With accuracy and reliability paramount in the rail environment, Atkins turned to Leica Geosystems’ solutions and technology to avoid costly downtime during expensive and time restrictive track possession. The latest innovations available within the new Leica Captivate range proved invaluable in this situation.

The Leica Nova MS60 MultiStation, with its wide spread of functionality including the ability to scan up to 1,000 points per second, was used on the project. Combined with the imaging capability on all the total stations and the interoperability of these with both the Leica CS20 controller and CS35 tablet computer, this enabled Atkins to capture every necessary detail in the quickest and most effective way.

相同的控制器和吸引软件used with the GNSS Smart Antennae to establish control quickly and accurately using HxGN SmartNet correction service. Alongside the Captivate software, the latest Leica LS15 digital level with imaging and auto focus were used, allowing for a faster, more accurate staff reading in harsh conditions. The instruments were also used in conjunction with track trollies and alongside Leica Geosystems laser scanning solutions.

提供和开发项目设计人员的地形调查数据和选定的点云提供了合理的铁路基础设施设计，该设计将增加南伦敦铁路网络已经包装的部分的容量。最终，这将使历史轨道对齐，使其适合于2020年及以后的铁路扩展。

The project and the data provided to it will lead to providing a better railway experience for the growing customer base and will be used to support economic growth of the surrounding areas.

向伦敦的铁路基础设施提供地形调查

对于阿特金斯来说，Leica Geosystems Solutions为该项目带来了许多好处。

“采用莱卡吸引软件技术,we can provide Network Rail with fast and accurate data realisation, avoid costly returns, and save them time and effort, whilst also reducing their risks,” said Groboljsek. “By using a combination of Leica Geosystems solutions, data was collected safely, accurately, efficiently and, above all, within limited time during track access possessions. Reduction in time spent on the track reduced site-based risks and lessened risk of injury to Atkins personnel. Also, there was a reduced risk to Network Rail property and infrastructure.”

使用来自HXGN SmartNet的后处理和实时RTK数据，使用快速准确的Leica Viva GS14 GNSS智能天线建立了初级和次要控制。该服务还用于通过直接在现场保证3D GNSS数据的质量来提高效率。

With intuitive and understandable software in the field and in the office, Captivate allowed instant 3D visualisation of the survey data collected on the railway site, providing a detailed understanding of the project requirements.

The Leica ScanStation P40 laser scanner also offered a fast scan rate with less noise and clearer scans along with streamlined workflows from the field to office and back via easy automated processing with Leica Cyclone laser scanning software. This was then all quickly and easily communicated to all staff and to the client using Leica TruView.

完成后，Brighton Mainline升级计划是第一个在项目生命周期中更早使用地形调查的研究之一。结合Leica Caintivate Solutions，铁路项目的交付顺利进行，使设计团队和测量师可以根据即时反馈主动管理和传输决策。