Stages of Geological Documentation on the Example of Landslides Located on the Slopes of the Dam Reservoir "Swinna Poreba" (Poland)

World Multidisciplinary Earth Sciences Symposium

Szafarczyk, Anna^1

AGH University of Science and Technology, A. Mickiewicz 30, Cracow

30-059, Poland^1

关键词: Geological structures;    Geotechnical designs;    Geotechnical parameters;    Legal regulation;    Reference network;    Retention reservoirs;    Soil displacement;    Stability calculation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/221/1/012037/pdf
DOI  :  10.1088/1755-1315/221/1/012037

来源: IOP

【 摘 要 】

In the Polish part of the Carpathians there are 14 retention reservoirs that accumulate around 1200 million m3 of water. The last larger hydrotechnical structure is the winna Porba reservoir, capacity: 160 million m3, built on the Skawa river. The reservoir has a very varied coastline, within which there are many landslide areas (including the Ostalowa landslide region). Hydropower disasters are known from the history of hydrotechnical objects, the reason for which was the insufficient identification of the geological structure of the reservoir bowl. Documentation of landslide in such areas is therefore an issue of great importance for the safety of not only the hydrotechnical object itself, but also people inhabiting the area of the water reservoir. At particular stages of documenting landslide areas, it is important to: recognize the mechanism that activates the landslide, assess the possibility of securing a slope or escarpment, indicate the optimal method of stabilizing the landslide, determine the geotechnical parameters necessary to develop a landslide protection project and its monitoring. In the article, the key elements of the documentation for the protection of the Ostalowa region were presented against the background of the legal regulations in Poland. The content of landslide document sheets, the scope of the geological work project and the scope of geological engineering documentation for the landslide protection project were characterized. The key elements of the geotechnical design are presented, including slope stability calculations and the proposed protections are presented. Surveying monitoring of the Ostalowa area constituting a continuation of geological works is carried out on a network of sixteen benchmarks controlled in relation to four benchmarks of the reference network. This monitoring should also be continued after the protection of the landslide, as it is the basic measurable way of determining land displacements. Measurement results indicating soil displacement are the basis for possible prevention actions.