Retrieved from Iss. 114, P. 2, 2023
Pages 105 -112
Received 19.07.2023
Revised 23.11.2023
Accepted 28.12.2023
Retrieved from Iss. 114, P. 2, 2023
Pages 105 -112
Abstract
The paper examines sections of highways that are arranged in extremely unfavorable, complex hydrological and engineering-geological conditions and, accordingly, have an increased risk of intensification of erosion of slopes of flood embankments under the influence of rolling wind waves. The authors present a method for determining the main parameters of drainage structures, in particular return filters, which are arranged on the slopes of flood embankments. The role of a reverse filter is also played by preparation for fasteners, which can be arranged from one layer of different-grained material or two or three layers of homogeneous material with particles of different sizes. The reverse filter prevents mechanical suffusion - the removal of small soil particles by the filtration flow. The number and thickness of the filter layers, as well as the type of material for the drainage structure, are selected depending on the material with which the slope is made and the type of external fastening. The thickness of a single-layer or double-layer return filter is determined taking into account the rolling height of the wave of 1% security and the height of the wind surge of water upstream. Depending on the thickness, the particle size of the reverse filter is calculated. To determine the parameters of the reverse filter, the authors have developed information and analytical support, which contains the working module "Reverse Filter" for the design and installation of structures for strengthening the slopes of the subgrade. The paper discusses several test examples of calculating the parameters of the reverse filter under the reinforcement of subgrade slopes. According to examples, in the zone of possible flooding of the subgrade, two types of fastening are proposed: prefabricated reinforced concrete slabs and stone crochet. Based on information and analytical support, a numerical experiment was carried out to study the dependence of the required minimum thickness of the reverse filter on the wave height
Keywords:
highways, roadbed, return filter, flooded embankment