METHOD OF ERECTING TWO-STEP CROSSHEAD OF COMBINED STRUCTURE Russian patent published in 2017 - IPC E02B3/02 

FIELD: construction.

SUBSTANCE: method of erecting a two-step crosshead includes making an inlet overflow weir, baffle steps and side walls of reinforced concrete. At the base of each baffle step, a gabion mattress with a thickness of 0.3-0.5 mis laid. Above the gabion mattress of each step, a cellular rectangular box-shaped structure of reinforced concrete beams square in section is arranged. At the end of each step, the height of the transverse beam is increased to 1.5 m and more for its operation as a baffle wall. The box structure cells above the gabion mattresses of each step are loaded with macrofragmental stone material with the thickness of 0.5-1 m. In the baffles of each step, the reinforced concrete beams of the box-shaped structure are rigidly connected to one another and to the baffle wall and delimited with side enclosing walls by means of expansion joints. The method of erecting a two-step crosshead of a combined structure is intended to stabilise eroded channel processes on mountain and foothill regulated areas of urbanized zones of small rivers and earth wasteways, where the concentrated difference in the channel marks does not exceed 3-3.5 m.

EFFECT: effective excess energy dissipation of water flows and operation reliability of the entire structure.

2 cl, 4 dwg