METHOD TO INWASH EARTH WORKS Russian patent published in 2013 - IPC E02B7/06 E02D17/18 

FIELD: construction.

SUBSTANCE: method to erect narrow-section dams is carried out by pulp supply into an inwashed structure simultaneously from the main and two distributing pulp lines. Distributing pulp lines are arranged in parallel at two sides of the main pulp line for inwash of side prisms from coarse fractions of the inwashed soil and the middle part, being the core of the dam, from fine fractions washed from the end of the main pulp line. Outlet holes in distributing pulp lines are made in their lower part and displaced by 20…30° from the vertical axis towards the main pulp line, being distant from each other at the distance of ℓ=d_main, where d_main - diameter of the main pulp line, and the diameter d_v=1/3d_d, where d_d - diameter of the distributing pulp line providing for inwash of soil along the length of side prisms. Pulp supply from the end of the main pulp line for inwash of the dam core is carried out via a damper made in the form of longitudinal steel rods with the diameter of 10…14 mm from smooth reinforcement steel, rigidly fixed by one side along the upper outer surface in the end part of the main pulp line with arrangement of the rods in parallel to the axis of the flow, with the distance between the rods equal to 1…2 of the rod diameter and made with a protrusion by the value of 1.5…2d_main, and the bend of the end section until complete closure of the vertical projection of the end of the main pulp line. The connection of the distributing pulp lines with the main one is made in the form of a socket coupled with the main pulp line, along the line produced from crossing of two cylinders of identical diameter, equal to d_main, and with the distributing pulp lines - in the form of an oval having the size along the large axis equal to d_main, along the small one - d_d. The inlet hole of the socket is protected with an inner lattice made in the form of longitudinal rods from smooth reinforcement steel with the diameter of 10…14 mm, rigidly fixed only at the discharge side with arrangement of the rods from each other at the distance of 0.75d_v.

EFFECT: invention makes it possible to erect protective dams with simultaneous clearing of river beds from bottom sediments and to prevent flooding of adjacent territories, which improves environmental condition in general.

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