Long-term operational data of an energy pile wall in the Lainzer Tunnel in Vienna

Dataset contents The dataset is provided as comma-separated value (CSV) files encoded in UTF-8. Each file corresponds to a specific measurement type or sensor group, following the standardized sensor naming scheme described in the accompanying publication Brunner et al. (2026) . File names follow the convention "Location_Measurement_Version", where "Location" identifies the measurement location (e.g., Pile, Ground, Serviceroom), "Measurement" describes the measured quantity and may consist of one or two entries separated by an underscore (e.g., Temperature_groundside, Performance_energy), and "Version" indicates the processing status where applicable (i.e., valid, final).

Some sensors required corrections due to drift, noise, or damage over the long monitoring period. Where applicable, files labeled "valid" contain only data that required no corrections, while files labeled "final" contain the fully processed dataset, where corrected values replace the raw data at points requiring correction. Each file uses a semicolon as delimiter and follows a standardized structure: the first column contains the timestamp in ISO 8601 format (yyyy-MM-dd HH:mm:ss), while subsequent columns represent the individual sensor indicators (e.g., Tgw_{KB-13/01}).

All numeric values are rounded to two decimal places. Missing values are represented by Not a Number (NaN). The data contain the original measurements without retiming as originally recorded.

The sensor To_{Mariabrunn} ( Air_Temperature_outside_Mariabrunn.csv ) contains daily mean outside air temperature data for the relevant time period sourced from Geosphere Austria ( doi.org/10.60669/gs6w-jd70 ), where data at shorter intervals down to 10 minutes are also available. All other data originate from TU Wien. File Sensor Unit Name Pile_Temperature_groundside_valid.csv Pile_Temperature_groundside_final.csv VWSG Geokon 4911-4 Rebar Strainmeter "Sister Bars" °C Tg1, Tg2, Tg3, Tg4, Tg5 Pile_Temperature_innerside_valid.csv Pile_Temperature_innerside_final.csv VWSG Geokon 4911-4 Rebar Strainmeter "Sister Bars" °C Ti1, Ti2, Ti3, Ti4, Ti5 Pile_Temperature_middle_valid.csv Pile_Temperature_middle_final.csv PT-100 °C Tm1_{S-07-20}, Tm3_{S-07-20}, Tm5_{S-07-20}, Tm1_{S-10-11}, Tm3_{S-10-11}, Tm5_{S-10-11}, Tm1_{S-11-12}, Tm3_{S-11-12}, Tm5_{S-11-12}, Tm1_{S-13-02}, Tm3_{S-13-02}, Tm5_{S-13-02}, Tm1_{S-14-11}, Tm3_{S-14-11}, Tm5_{S-14-11} Ground_Temperature_buried.csv PT-100 °C Tb1_{S-16-02}, Tb1*_{S-16-02} Ground_Temperature_groundwater.csv Unknown °C Tgw_{KB-13/01}, Tgw_{KB-1c/01}, Tgw_{KB-15/93}, Tgw_{KB-B4}, Tgw_{KB-4/01}, Tgw_{KB-14/01}, Tgw_{12/93}, Tgw_{Siphon-1}, Tgw_{Siphon-2} Air_Temperature_outside.csv PT-100 °C To, To_{serviceroom} Air_Temperature_outside_Mariabrunn.csv Meteorological station °C To_{Mariabrunn} Serviceroom_Temperature_fluid_collector.csv Immersion sensor °C Tf_{in}, Tf_{out} Serviceroom_Temperature_fluid_S-10-11.csv PT-100 °C Tf_{out-S-10-11} Serviceroom_Temperature_fluid_S-07-20.csv PT-100 °C Tf_{in-S-07-20}, Tf_{out-S-07-20} Serviceroom_Performance_volume.csv Pulse measurements m³ Pv Serviceroom_Performance_energy.csv Pulse measurements kWh Pe Data coverage and updates This dataset contains the data discussed in Brunner et al. (2026) , covering measurements up to 2026-05-18 08:00.

Future versions will include additional data from the ongoing monitoring program as well as measurements from sensors not included in the current release. Associated publication Brunner, A. T., Markiewicz, R., & Adam, D. (2026). Long-term operational experience of an energy pile wall in a tunnel: Construction, repairs, energy performance and thermal behavior.

Tunnelling and Underground Space Technology, 178, 107978. doi.org/10.1016/j.tust.2026.107978