RECOMMENDATIONS ON EMERGENCY AND RESTORATION WORKS OF WATER SPRING STRUCTURE 1 ON THE CHORNY TASHLYK RIVER IN THE CITY OF NOVOUKRAINKA

Abstract

The article provides recommendations for emergency restoration work on the spillway structure on the Chorny Tashlyk River in the city of Novoukrainka. The problem statement and survey facts that affect the operation of the spillway structure are presented in detail. The characteristics of the hydraulic structure and the Chorny Tashlyk River are given. A list of defects is presented and the category of the technical condition of the structure is determined. The technical condition of the supports is determined and the category of their technical condition is determined. Two options for restoring the hydraulic structure to its working capacity are presented. Consider in detail both options for restoring the hydraulic structure and present the sequential execution of the work. Detailed information about the Chorny Tashlyk River is provided, its main characteristics are given. The type of water regime of the river is given, a multi-year schedule of average annual flows at the Tarasivka post is presented. Flow indicators by year are given (the largest, average and smallest). A graphical characteristic of the maximum flow rate of spring floods of the Chorny Tashlyk River is presented. Hydraulic calculations of the Novoukrainske reservoir hydraulic structure are presented in 4 variants of the reconstruction of the structures. Each of the variants is described in detail, the third variant is determined and adopted in further calculations. A calculation table of the results of hydraulic indicators of all 4 options is presented. Specific design solutions for the overhaul of hydraulic structure No. 1 are presented:– dismantling of defective reinforced concrete beams;– dismantling of metal segment gate;– dismantling of metal gates of the sandor type;– dismantling of beam slabs; – repair of the protective layer of concrete of stands and intermediate supports;– repair of the protective layer of concrete of the beam ribs;– installation of a new beam plate;– installation of new metal gates of the sandor type;– arrangement of a technological platform in the vicinity of the parking lot.Repair work on the hydraulic structure is planned to be carried out with a phased closure of half of the channel of the Chorny Tashlyk River by installing a gabion bridge from the intermediate support to the bank at an acute angle to the hydraulic structure.