RU2228400C2 - Technique to let water and floating garbage pass through road tube - Google Patents

Abstract

FIELD: road construction, running of artificial water passages and their utilization in process of building of road embankments. SUBSTANCE: open area of water flow across section of approach diminishes while surface layer is compressed and additional flow of water is ejected within its limits by bottom plate that is installed and locked floating in front of inlet to road tube. EFFECT: enhanced water and garbage carrying capacity of road tube run under pressure-free condition, improved ecological situation in water area of upper and down-stream waters, provision for passage of all storm and flood waters through road tube under pressure- free condition for shorter time. 3 dwg

Description

The invention relates to methods for arranging roads, in particular to methods for diverting water from the base of roads, and can find application in the construction of road embankments, namely, in the operation of headless culverts installed under road embankments.

There is a method of passing water through a road pipe, including compressing the entire water stream with openers of the streamlined inlet head of the culvert (O. Andreev, E. Boldakov and others. A brief guide to small bridges and pipes. (Search and design) / Under general Edited by E.V. Boldakova. - M.: Publishing House of Road-Technical Literature. GUSHOSDORA IPU, 1953, 224 pp.).

The use of streamlined heads with openers gives a slight increase in water flow when the pipe is operating in pressure and half pressure modes, which allows you to replace this pipe diameter with an adjacent one in the direction of decrease. However, this method has limited throughput when water passes through a pipe operating in a non-pressure mode.

Closest to the proposed technical essence is a method of passing water through a culvert, comprising compressing the entire water stream by increasing the length of the approach section using the extended side wings that are permanently installed between the portal, the superportal wall and the spacer (Aut. St. USSR No. 1654419, CL E 01 F 5/00, 1991 (prototype).

The disadvantage of this technical solution, taken as a prototype, is the limited water throughput and the complete absence of conditions for the passage of floating debris from the upper pool to the lower one, which leads to its accumulation at the inlet of the culvert.

The invention is aimed at increasing the water and waste throughput of a headless pipe operating in a pressure-free mode by simultaneously compressing the surface layer of the water stream and reducing its living section area in the approach section, as well as ejecting an additional liquid flow in the zone of the approach section for water and floating passage garbage through the inlet of the pipe from the upstream to the bottom.

To achieve a result in the method of passing water and floating garbage through a headless pipe operating in a pressure-free mode, including compression of the water stream in front of the pipe inlet, simultaneously with the compression of the surface layer of the water stream, the living section area of the approach section is reduced and an additional stream is ejected within it liquid by means of a pallet with guide wings, containing the center of the pallet along its entire length equal to the length of the approaching section, a recess with a width equal to the width of the inlet of the pipe, and the pallet is mounted and fixed afloat in front of the inlet of the pipe with the possibility of following changes in the variable level of the surface layer of the water stream.

By the approach section, we mean the part of the upper pool water area directly adjacent to the opening of the culvert and having the necessary surface flow velocities at the site farthest from the hole for water and floating debris to pass through.

Figure 1 shows a top view of one of the possible designs of the pallet installed in front of the inlet of the pipe.

Figure 2 - section of the pallet along aa.

Figure 3 - section of the pallet and pipe along BB with the image of the plot of the speeds of the water flow in the alignment of the pipe hole without a pallet and with a pallet.

To implement the method, one of the possible designs of the pallet is used (Fig. 1), which is a figured floor 1 with guide wings 4. The figured floor has the shape of an isosceles trapezoid. In the center of the pallet along its entire length, equal to the length of the approaching section, there is a recess 2 with a width equal to the width of the inlet pipe 3. On the pallet perpendicular to the deck and at an angle to the axis of the pallet, guide wings are installed. The pallet is installed and fixed in front of the pipe inlet afloat with anchors 5 so that the flooring plane is horizontal, and to such a depth that some of the guide wings are above the free surface of the water. At a variable level of the upstream, the pallet should follow its changes, which is provided by a special device (not shown).

The pallet is installed during the low-water period for pipes in operation, or after the completion of the pipe construction.

The method of passing water and floating debris through a road pipe operating in a non-pressure mode is carried out in the following ways. In front of the inlet of the pipe, a pallet is installed and fixed afloat, which creates a compression of the surface layer of the water stream and at the same time reduces its living section area at the approach site. In connection with the reduction of the cross section, the water flow rate increases, which leads to a decrease in pressure, and this creates an additional suction fluid flow in the area of the approaching section from its peripheral parts to the center of the pallet or to its longitudinal axis. Floating debris located in the area of the approaching area is established by ejection along the longitudinal axis of the pipe and, together with the fluid flow, rushes to the inlet of the pipe 3 and, passing through the pipe body and the outlet, is in the downstream.

Passing floating debris through the road pipe cleans the water area of the upper pool, thereby improving the environmental situation and creating conditions for collecting garbage in the lower pool by installing garbage collectors directly behind the pipe outlet.

The proposed method for passing water and floating debris through a road pipe allows to increase the water and garbage throughput of pipes, improve the environmental situation in the upper and lower pools, and also ensure the entire water pass in both flood and storm periods in a non-pressure mode in a shorter period of time.

Claims (1)

The method of passing water and floating debris through a headless road pipe operating in a pressure-free mode, including compressing the water stream in front of the pipe inlet, characterized in that simultaneously with the compression of the surface layer of the water stream, the living section is reduced in the approach section and an additional ejection is erected within it fluid flow by means of a pallet with guide wings, comprising a center-made pallet along its entire length equal to the length of the approaching section, a recess with a width equal to the width of the inlet of the pipe, and the pallet is installed and fixed afloat in front of the inlet of the pipe with the possibility of following changes in the variable level of the surface layer of the water stream.

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