RU140593U1 - DEVICE FOR INLAND SITES FOR WATER DRAINAGE FROM FROM ENTRANCE TRAYS - Google Patents

Abstract

The device of the input section for the drainage from the near-edge trays of a triangular section into the drainage trays of a rectangular section, including a turning section with one or two entrances, characterized in that it is made with a double curvature bottom of a curved shape, and its optimal geometry satisfies the theory of stormy flow control.

Description

The invention relates to the field of road construction, namely to water disposal from roads.

A device is known for discharging water by open trays from the carriageway [Typical design decisions 503-09-7.84 “Drainage facilities on the roads of the common network of the USSR,” approved and put into effect by the Ministry of Transport and Construction, order dated 03/28/1984] containing lead-in chutes (cuvettes) with cross-sections with a triangular cross-sectional shape, inlet with a flat bottom, bounded by a flat wall. The inlet section goes into the telescopic tray. All elements of this design are made of concrete. The inventive and existing devices serve one purpose - perhaps the best organization of surface water drainage from the roadway.

The efficiency of the entire drainage system is determined, first of all, by the ability of the inlet section to possibly intercept the stream flowing along the edge tray, turn it 90 away from the road and smoothly transfer it to the drainage tray.

The disadvantage of the existing option is the complete disregard for the hydraulics of turbulent flows, because of which most of the flow along the edge trays slips in the area of entry into the drainage tray. In addition, oblique waves arise in this area, which leads to overflow over the sides bordering the area, and subsequent washing and destruction of the structure.

Closest to the proposed invention is a more advanced design of the inlet section, developed by the TGV department of Saratov State University [New in the design of drainage from roads / L.I. Vysotsky, Yu.A. Izyumov, I.S. Vysotsky, Saratov .: Publishing House of SSTU 2011], containing a bottom of a complex biconvex shape, satisfying the principles of the theory of control of turbulent flows. The design has two options: with one- and two-way water supply. The output section of the semicircular design.

The disadvantages of this device are the occurrence of wave formation and the complicated shape of the bottom surface.

The objective of the present invention is to accelerate the drainage of the roadway and increase the maintenance intervals. In addition, as well as in optimization, using the theory of rapid flow control, of such a design of the entrance to the drainage tray, which would provide the highest throughput in the absence of undesirable wave formation and overflow of water through the side walls, and, as a result, would not allow washing out and destruction of the drainage system from highways.

This object is achieved in that in the device for connecting a near-edge tray of a triangular section with drainage chutes of a rectangular section of a rectangular section, a turning section with one or two inputs is included, characterized in that it is made with a double curvature bottom of a curved shape, and its optimal geometry satisfies the expressions ( in accordance with the theory of control of turbulent flows):

where z is the mark of the free surface;

h is the vertical depth;

moreover, z (in dimensionless form) is determined by the formula:

where S ₀ , n are dimensionless coordinates;

z ₀ (S ₀ ) - mark the longitudinal profile of the axial surface of the stream line;

b is the width of the input section;

In - the width of the output section;

P is the velocity distribution function;

ρ ₀ (S ₀ ) is the radius of curvature of the plan of the axial surface stream line;

и ƒ(n, S₀) - согласующие функции

and ƒ (n, S ₀ ) are matching functions

. продольный профиль осевой линии тока:

. longitudinal profile of the axial streamline:

β _n - the angle of inclination to the bottom horizon of the edge tray;

β _to - the angle of inclination of the bottom to the horizon of the input section in the end section;

m - coefficient calculated by the formula:

y ₀ (S ₀ ) - the equation of the axis of the input section is taken in the form of a polynomial of the eighth degree (in dimensionless form):

V ₀ - average speed in the initial section;

g is the acceleration of gravity;

L ₀ - the length of the center line in the plan;

φ - coefficient calculated by the formula:

φ = 1- (1-0.95) S ₀ .

The relationship between dimensionless and dimensional quantities can be described as follows:

t (dimension) = t (dimensionless) · L _0. ,

where t is a certain quantity.

The proposed device and its difference from the existing ones is illustrated by the drawings: Fig. 1 shows a typical variant of the inlet section, Fig. 2 shows a variant of the inlet section (prototype) with a one-way entrance, Fig. 3 shows a variant of the inlet section (prototype) with a two-side entrance, figure 4 shows the proposed scheme of the input section with a one-way input, figure 5 shows the proposed scheme of the input section with a two-way input, figure 6 shows a diagram of the input section of the device, figure 7 shows a diagram of the output section device on tray 8 is a three-dimensional model constructed in the automatic designing program, Figure 9 shows a diagram of the outlines of the input section plan in Figure 10 shows the cross-sectional shapes,

Where;

1 - carriageway;

2 - edge tray;

3 - drainage tray;

4 - entrance area.

The device of the input section for drainage from the edge trays contains the input part of the triangular (Figure 3) and the output part of the rectangular section (Figure 4) located relative to each other at an angle of 90 °, and at certain distances along the x, y, z axes ( 5). Between them is part of the smooth transition, consisting of the bottom of a special biconvex shape and vertical walls (Figs. 5, 7). The design involves two options for providing a one-way and two-way entrance (figure 1, 2). The design is made of concrete, or new structural materials.

The device works as follows: surface water from the roadway 1 due to its transverse slope falls into the edge tray 2. Due to the use of the rotation principle 4 in the proposed design of the inlet section, the rapid flow from the edge tray 2 without significant wave formation, bursts, overflows and others adverse events is rotated 90 °, transferred to the drain tray 3 and beyond.

An optimal example of the device can serve as a tray with a single entrance, designed for a pass of 160 l / s. Its geometrical parameters (Figs. 3, 4, 6) are such that b is 0.75 m; B - 0.4 m; B ₀ - 5.3 m; L ₀ - 10 m; h _t - 0.04 m; h _k - 0.04 m; h _k - 0.04 m, the deviation along the y axis - 6.93 m; the deviation along the z axis is 1.38 m.

Claims (1)

The device of the input section for the drainage from the near-edge trays of a triangular section into the drainage trays of a rectangular section, including a turning section with one or two inputs, characterized in that it is made with a double curvature bottom of a curved shape, and its optimal geometry satisfies the theory of stormy flow control.

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