ABSTRACT
As part of the work to protect the motorway and the industrial area from the impact of mudflows, visual and engineering geological surveys of the mudflow dangerous gorge were carried out. The obtained materials allowed us to calculate the characteristics of mudflows, such as type, discharge, speed and volume. At the time of the survey, antimudflow structures of two types were built in the stream bed: rigid thorough and solid with partial bed closure. Thorough designs are made of metal pipes of three hundredth and five hundredth diameters arranged in two rows with spacing. Solid structures are also erected from steel pipes, but installed in one row and the gaps between the elements are closed with steel plates. On the basis of the design data of the main mudflow parameters, the analysis of the performance of the existing antimudflow structures was made, which revealed the need to increase the amount of retained solid matter flow. In view of the good state of the structures, recommendations were given on the reconstruction of antimudflow structures. To prevent the edges from undermining and to increase flow retaining, it is proposed to: add elements to ensure complete bed closure and dismantle the plates on solid structures, as well as install a new rigid thorough structure. After carrying out the recommended measures, a cascade of rigid thorough antimudflow structures will allow to fully detain the design solid matter mudflow.
