施工期间的铁路和平台监控

Authors: Sandra Kombouare, Steven Thurgood & the Oxygen agency

New monitoring methods

Location
Gare de la Croix de Berny, RER B, Antony (92), FRANCE

项目期
2018年10月 - 2019年7月

RATP	Railway transport operator in Paris region
Brézillon	Construction company, subsidiary of Bouygues, expert in housing engineering, education, health, transport, industry and environment.
GEOFIT	Geospatial data acquisition and processing land and engineering surveying company.

RATPenlisted construction companyBrézillon为了在现场铁路上拆除行人桥，建造了越过轨道下方的地下通道，以及在法国巴黎附近的Croix de Berny车站的乘客拆除和重建。

Brézilloncontracted the services ofGEOFITto complete land and engineering survey works for the scope of the project, including monitoring the stability of the railway track and platforms during the 9 month construction process.

GEOFITwere confident to meet the challenging technical standards ofRATP作为建设项目要求的一部分assurance monitoring combining geodetic and geotechnical instrumentation. The instrumentation was detailed in the monitoring specification for the project.

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The project specific solution

GEOFIThave experience in the use of new and advanced technologies, thus designing and operating hybrid instrumentation was a welcome challenge. They were awarded the contract to undertake the land and engineering surveying operations of the project, 80% of which were dedicated to the monitoring of the construction works at the station.

Mr Alexandre Toubois, Head of Infrastructures & Monitoring at GEOFIT他的团队的任务是监视铁路轨道的几何形状，平台，周围的基础设施以及拆除和施工阶段期间的临时作品。

Using a combination of technologies, an automated monitoring solution was developed following consultation with the monitoring experts at Leica Geosystems France, combiningLeica Nova TM50 total stationsand WiSen wireless sensors.

知道要求快速两分钟reading frequency for specific assets, a hybrid monitoring solution was developed by combining continuously operating automated total stations (measuring 3D prisms non-stop) and a dynamic reading interval solution using WiSen sensors (tilt and crack gauges).

They installed arrays of monitoring sensors to the railway track, platforms and other structures (station buildings, overhead electrification support columns and existing structural cracks).

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硬件和软件

• 2xLeica Nova TM50
• 30x WiSen wireless tilt meters
• Leica GeoMoS Monitor
• Leica GeoMoS Now!

Data from these sensors was managed in a single interface (Leica GeoMoS Monitor) and made accessible to the client through theLeica GeoMoS Now! visualization platform.

Using these systems, a team of experts was able to obtain frequent and reliable observations under all conditions. The monitoring made it possible to follow precisely the effect of the construction on the railway tracks and associated structures. Wireless tilt sensors were utilized, measuring relative displacement data of the railway track for automated computation for rail geometry data (CANT & TWIST).

The total station prism monitoring provided absolute displacement data, validating the relative data and allowing for further railway geometry computations to be completed. In addition monitoring data regarding associated structures and settlement was computed using the information from the 3D prism observations. TheLeica Geomos软件套件启用传感器控制，数据采集，计算和事件管理。该软件在集成解决方案的实时计算了变形，将所有数据进纸组合到单个源中。用户能够配置单个元素触发价值和警报操作，从而在变形超过指定阈值时提供警报。

使用这些乐器及其在Leica Geomos软件套件GEOFITwas able to meet the expectations of their client for reporting and alarming of any deformation detected with the assets.

GEOFITwas able to ensure the smooth running of the work by analysing the data collected and by informing the operator and the construction company of any change. This complete instrumentation & monitoring solution for the railway environment allowed the work to be carried out on time, without causing any inconvenience to station users. The monitoring not only ensured the 3rd party user safety, but also ensured the safety of the various stakeholders and construction operatives present at the site.

客户BrézillonandRATP欢迎使用Geofit安装和运营的技术来实施此联合创新解决方案，该技术允许无需延迟就可以安全地执行工作。

For more information contact the monitoring solutions specialists at Leica Geosystems.