Railway and platform monitoring during construction

作者：Sandra Kombouare，Steven Thurgood和The Oxygen Agency

New monitoring methods

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

Project period
October 2018 - July 2019

ratp	Railway transport operator in Paris region
布雷斯隆	建筑公司，Bouygues的子公司，住房工程，教育，健康，运输，工业和环境专家。
GEOFIT	地理空间数据获取和处理土地和工程测量公司。

ratpenlisted construction company布雷斯隆to undertake demolition of a pedestrian bridge over a live railway, construction of a replacement underground passageway crossing beneath the tracks and the demolition and reconstruction of a building for passengers at the Croix de Berny station, near Paris, France.

布雷斯隆签约GEOFIT为了完成该项目范围的土地和工程调查，包括监视9个月建设过程中铁路和平台的稳定性。

GEOFITwere confident to meet the challenging technical standards ofratp作为建筑项目的一部分，需要保证将大地测量和岩土工具结合起来。该仪器在项目的监视规范中详细介绍了。

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特定于项目的解决方案

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 GEOFITand his team were tasked to monitor the railway track geometry, platforms, the surrounding infrastructure and the temporary works during the demolition and construction phases.

使用的组合技术,自动化monitoring solution was developed following consultation with the monitoring experts at Leica Geosystems France, combiningLeica Nova TM50total stations和Wisen无线传感器。

了解对特定资产的快速2分钟阅读频率的需求，通过将连续运行的自动化总站（测量3D Prisms不间断）和使用WISEN传感器（倾斜度和裂纹测量器）结合使用，开发了混合监测解决方案。bob apple）。

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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Hardware and Software

• 2xLeica Nova TM50
• 30倍WISEN无线倾斜仪表
• Leica GeoMoS Monitor
• 现在，Leica Geomos！

这些传感器的数据在单个接口（Leica Geomos Monitor）中管理，并通过现在，Leica Geomos！可视化平台。

使用这些系统，一组专家团队能够在所有条件下获得频繁可靠的观察结果。监测使得可以准确遵循构造对铁路轨道和相关结构的影响。利用了无线倾斜传感器，测量铁路轨道的相对位移数据，用于用于铁路几何数据（CANT＆Twist）的自动计算。

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 software suiteenabled sensor control, data acquisition, calculations and event management. The software calculated deformation from the integrated solution in real time combining all data feeds into a single source. Users were able to configure individual element trigger values and alarm actions thus providing alerts when deformation exceed a specified threshold.

Using these instruments and their integration within theLeica GeoMoS software suiteGEOFITwas able to meet the expectations of their client for reporting and alarming of any deformation detected with the assets.

GEOFIT能够通过分析收集的数据并告知运营商和建筑公司的任何更改来确保工作的平稳运行。这项针对铁路环境的完整仪器和监视解决方案允许按时执行工作，而不会给车站用户带来任何不便。监视不仅确保了第三方用户安全，而且还确保了现场的各个利益相关者和建筑工程的安全。

Clients布雷斯隆andratpwelcomed the implementation of this combined innovative solution using technologies installed and operated by GEOFIT, which allowed the work to be carried out securely with no delays.

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