Monitoring a heritage hotel in the historic centre of Cologne
Case Study
作者：史蒂文·瑟古德（Steven Thurgood）T/F/D
In the ancient city of Cologne, the Dom Hotel is one of the oldest Grand Hotels in Europe. It first opened in 1857, underwent its first renovation in the 1800s, another after the Second World War and has been in a process of modernisation since 2014. Germany’s Cultural Heritage Policy ensures the preservation of historic buildings and culturally significant structures, meaning that the 5-star hotel’S原始FA必须保留Çade和楼梯。施工运营始于2016年，部分拆除内部结构于2019年达成协议。
Surveying engineering specialist,Vermessungsbürokds该项目被任命为在建设过程中对遗产建筑进行结构监测。遵循拆除的设计风险评估，计算了遗产外墙的变形和运动的结构矩公差ade. Martin Reck of Vermessungsbüro KDS worked with Leica Geosystems’regional monitoring solutions expert, Heiner Gilleßen, to design a plan for monitoring the sensitive structure.
Deploying solutions built for sensitivity
Leica Geosystems通常建议部署Leica Nova TM60和GeoMoS Edgesolution to measure prisms on the hotel’s structure, but the support frame on the façade and its coverings meant that there was no line of sight for an optical system. Instead Gilleßen suggested a mix of solutions from the wider Hexagon Geosystems, Leica Geosystems and third-party portfolio that he could integrate into theGeoMoS Monitoring Solution。该套件可以灵活地和速度理解和对监视项目中的复杂需求做出反应。
由于需要监视立面的规范，但没有用于光学设备的物理访问或视线，HeinerGilleßen建议使用无线倾斜传感器，这些传感器可以快速轻松地安装，同时几乎不需要维护。来自传感器的所有数据仍然可以管理和可视化Leica GeoMoS Now!- 一个基于Web的应用程序，可为授权人员查看数据提供简单但安全的访问权限。这种工具的组合使客户无需学习或实施新的软件套件就可以添加系统。
总的来说,18个传感器被安装在不同的locations on the façade, allowing precise automated monitoring to be completed for the rotation of the façade as demolition of the inner hotel structure was completed. This included 15 two-axis inclination sensors, a gateway and a solar panel. Distance sensors were also used in combination with the basic tilt sensors to measure offsets from the structural walls and ensure the geometry of the structure remained constant. This was particularly relevant as the elevator shaft in the hotel was to remain undisturbed by the construction teams working on the project. Constant offset and inclination readings enabled the safe monitoring of the elevator shaft.
Generating data-driven results using automation
Since its installation in September 2019, the Leica solution conducts18 readings every 30 minutes, producing approximately 550,000 data records with an extra 1,000 readings per day. This was available in GeoMoS within 120 seconds of data measurement on-site and made available on the cloud platform of GeoMoS Now!, providing live data around the clock.
When the works programme was extended due to archaeological finds in the basement excavation, the extension of the monitoring scheme’s life was not a problem. The equipment installed is designed to last maintenance-free for years due to 30-minute data acquisition intervals, self-powered internal batteries and IP65 rated enclosures for all-weather working. Gilleßen provided local and remote training for those new to the scheme.
保护Dom Hotel的遗产
Martin Reck and the Vermessungsbüro KDS wider team were very satisfied with the solution provided. In fact, they also utilised a selection of surveying solutions for manual surveying works throughout the project, including theLeica Sprinter 150 Digital level, Leica DNA03, Leica LS15,Leica Disto,Leica Viva GS12 GNSS，Leica Viva GS16 GNSS,Leica TS15和TS16总站和Leica Viva CS10现场控制器。
Automation was essential in ensuring the façade was able to remain in the Dom Hotel. With 120 guest rooms and suites on the way for Cologne’s visitors to enjoy, Leica Geosystems played a significant role in protecting the hotel’s rich heritage. As cities evolve and structures develop, tools such as theGeoMoS Monitoring Solution和Leica GeoMoS Now!are ensuring structural safety and the preservation of history.
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