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Stability evaluation of modernized bank protections in a culvert construction

机译：涵洞建设中现代化银行保护的稳定性评估

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The paper presents stability evaluation of the banks of the Wilga River on a chosen stretch in Ko?mice Wielkie, Ma?opolska Province. The examined stretch included the river bed upstream from the culvert on a district road. The culvert construction, built over four decades ago, was disassembled in 2014. The former construction, two pipes that were 1.4 m in diameter, was entirely removed. The investor decided to build a new construction in the form of insitu poured reinforced concrete with a 4 x 2 m cross section. Change of geometry and different location in relation to the river current caused increase in the flow velocity and, as a consequence, erosion of both protected and natural banks. Groundwater conditions were determined based on the geotechnical tests that were carried out on soil samples taken from the banks and the river bed. Stability calculations of natural slopes of the Wilga River and the ones protected with riprap indicate mistakes in the design project concerning construction of the river banks. The purpose of the study was to determine the stability of the Wilga River banks on a selected section adjacent to the rebuilt culvert. Stability of a chosen cross section was analysed in the paper. Presented conclusions are based on the results of geotechnical tests and numerical calculations.
机译：本文介绍了在Ma？opolska省Ko？mice Wielkie选定路段上Wilga河两岸的稳定性评估。所检查的河段包括一条区域道路涵洞上游的河床。这座涵洞结构始建于四十年前，于2014年拆除。原来的结构，两条直径为1.4 m的管道被完全拆除。投资者决定以横截面为4 x 2 m的原位浇筑钢筋混凝土的形式建造一座新建筑。几何形状的变化和相对于河流的不同位置导致流速的增加，因此，保护​​河岸和天然河岸都受到侵蚀。根据对从河岸和河床采集的土壤样本进行的岩土工程测试确定了地下水条件。维尔加河自然坡和用riprap保护的自然坡的稳定性计算表明，在有关河岸建设的设计项目中存在错误。这项研究的目的是确定邻近重建涵洞的选定部分上的维尔加河岸的稳定性。本文分析了所选截面的稳定性。提出的结论是基于岩土工程测试和数值计算的结果。

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