Monitoring a heritage hotel in the historic centre of Cologne

Author: Steven Thurgood &T/F/D

在古城科隆,Dom酒店是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FAçade and staircase must remain. Construction operations began in 2016 and partial demolition of the internal structure was agreed upon in 2019.

Surveying engineering specialist,Vermessungsbüro KDSwas appointed by the project to undertake the structural monitoring of the heritage building during construction. Following the design risk assessments for the demolition, structural moment tolerances were calculated for the deformation and movements of the heritage façade. Martin Reck of VermessungsbüRo KD与Leica Geosystems合作区域监测解决方案专家Heiner Gilleßen, to design a plan for monitoring the sensitive structure.

Deploying solutions built for sensitivity

Leica Geosystems would usually recommend deploying theLeica Nova TM60andGeomos 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. This suite allows flexibility and speed in understanding and reacting to complex demands in monitoring projects.

With the specification requiring monitoring of the façade, yet no physical access or line of sight for optical devices, Heiner Gilleßen recommended wireless tilt sensors that could be installed quickly and easily while requiring little maintenance. All the data from the sensors could still be managed and visualised fromLeica GeoMoS Now!- a web-based application that provides easy, but secure access for authorised personnel to view data. This combination of tools gave the customer the capability to add systems without having to learn or implement a new software suite.

总共将18个传感器安装在立面上的各个位置，从而使精确的自动监视完成，以拆除内部酒店结构的拆除，以旋转立面。其中包括15个两轴倾斜传感器，一个门户和太阳能电池板。还将距离传感器与基本倾斜传感器结合使用，以测量结构壁的偏移，并确保结构的几何形状保持恒定。这尤其重要，因为酒店的电梯轴将不受该项目的建筑团队的影响。持续的偏移和倾斜读数使电梯轴的安全监视。

Generating data-driven results using automation

Since its installation in September 2019, the Leica solution conducts每30分钟每30分钟读数18次读数，每天产生约550,000个数据记录，每天又有1,000个读数。这可以在现场数据测量的120秒内在Geomos中找到，并在Geomos！Now！Now！的云平台上提供，可以全天提供实时数据。

当由于地下室发掘中的考古发现而扩展工程计划时，监视计划的寿命的延长不是问题。由于30分钟的数据采集间隔，自动化的内部电池和IP65额定额定装置，用于全天工作，因此安装的设备旨在无需维护多年。Gilleßen为该计划的新手提供了本地和远程培训。

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 and TS16 Total StationandLeica Viva CS10 Field Controller.

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 SolutionandLeica GeoMoS Now!are ensuring structural safety and the preservation of history.

Interested in monitoring? Please feel free to read further case studies, showing how our customers use our solution to improve their monitoring workflow:

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