Folded-line shape diversion pier of spillway

Abstract

The invention relates to a folded-line shape diversion pier of a spillway. The folded-line shape diversion pier comprises an upper pier, a middle pier and a lower pier or comprises a middle pier and a lower pier. The upper pier is a semi-cylindrical pier, the middle pier comprises a middle pier body, an overhead view surface of the middle pier body is an isosceles trapezoid, side view surfaces of the middle pier body are right triangles, a pier head in the shape of a semicircular oblique frustum with a small bottom and a large top is arranged on the front oblique surface of the middle pier body, the lower pier comprises a pier body in the shape of a triangular prism,wherein the overhead view surface of the pier body is a rectangle and the side view surfaces are right triangles, a pier body in the shape of an isosceles oblique trapezoidal prism with a small front portion and a large rear portion is arranged on the front oblique surface of the pier body in the shape of the triangular prism, side view surfaces of the pier body in the shape of the isosceles oblique trapezoidal prism are parallelograms, and a pier head in the shape of a semicircular oblique cylindrical table is arranged on the front oblique surface of the pier body in the shape of the oblique trapezoidal prism. The folded-line shape diversion pier has the advantages that the folded-line shape diversion pier has a regular size, stress on each pier head is simple, a downstream flow condition is improved, the construction difficulty is reduced, requirements on the strength of materials is lowered, and the folded-line shape diversion pier is adaptable to flow rate variation in a large range.

Description

technical field [0001] The content of the invention belongs to the technical field of water conservancy engineering facilities, and relates to a broken-line diversion pier for a spillway that can be used to ensure the safety of water conservancy engineering facilities such as reservoir dams, discharge structures, and hydropower plant buildings. Background technique [0002] In the prior art, the most typical known spillway diversion pier is the gate pier, the pier head body is vertically semi-cylindrical, and is mainly suitable for low flow velocity. For the spillway chute, the flow velocity is relatively high. At present, there are many studies on aerated diverter piers, and there are also many shapes, but for pure diversion piers, there is no mature shape. The current diversion piers can be divided into two categories: the first type is vertical pier head body, and its pier head shape has triangle, semicircle and triangular semicircle combination; the second type is pier h...

AI Technical Summary

Problems solved by technology

The deficiencies in the actual application of the existing shunt piers are: (1) The flow state is not good, manifested as either the water fin is too high, the water splashes, or the water flows off the wall, causing the downstream water flow to be turbulent; (2) The pier head The force is complex, which is easy to cause structural vibration; (3) the applicable flow range is small, which restricts the management and operation of the reservoir; (4) the body shape of the pier is too complex, which is inconvenient for civil engineering implementation; (5) water cavitation is prone to occur, resulting in cavitation of the diversion pier (6) High requirements on the strength of the diversion pier material, which increases the construction difficulty and construction cost

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