SU1723233A1 - Method of maintaining river waterway in operating condition - Google Patents

Abstract

The invention relates to the field of hydraulic engineering. The purpose of the invention is to reduce the laboriousness and cost of work to remove and remove groundwater from the canal on the shallow when the axis of the canal coincides with the direction of the natural flow in a pond. On the shallows with borders 1 of the channel, near the lower border, 4 excavations are made. The excavated soil is laid in the earth walls. Due to this, the flow rate 7 increases. Application soil 3 is washed away by current 7, starting from excavation 4 and ending at the left margin of the channel. 1 hp ff, 4 ill.

Description

The invention relates to the field of hydraulic engineering and is intended to remove sediments on shallows to maintain the design depth of the waterway.

The purpose of the invention is to reduce the laboriousness and cost of work to remove and remove sediment from the canal on a roll when there is a coincidence or small angle of divergence between the axis of the canal and the direction of the natural flow in a pond.

FIG. 1 shows the roll over the boundaries of the channel, view in plan; in fig. 2 - roll, side view; in fig. 3 - roll during the flushing of the sediment, side view; in fig. 4 - inset roll with boundaries of the channel, view in plan.

In FIGS. 1-4, the following notation is adopted: 1 — boundaries of the channel on the shallow; 2 - root soil on the shallows; 3 alluvial soil on the roll; A - transverse excavation; 5 - earth shafts; 6 - soil deposition in the transverse excavation; 7 - the direction of the current on the shallow, and - the angle of inclination of the axis of the earth shaft to the direction of the current on the shallow.

The method is ralised as follows.

In a reservoir, on a shallow, they mark the boundaries of 1 channel of passage by temporary signs, which are installed more often. Landmarks, buoys, etc. can be used as signs. Indicate the boundaries of the transverse grooves and soil. The axles of the earth shafts are designated 5. The machine is delivered to the roll for work. Under these conditions, it is most expedient to use a suction dredger. The dredger is installed with a soil collecting device above the location of the transverse excavation 4 of the soil (Fig. 1). Floating pipeline |

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Water is placed at one of the lateral boundaries 1 of the channel. Develop the soil in the recess 4 and placed in the earth shafts 5. Then move the floating pipeline to the other side of the border and placed in the earth shafts 5 to the right of the border. The dredger is removed from the roll. The roll has the appearance shown in FIG. 1 and 2.

Even during the period of earthworks, the situation on the roll does not change. The final change in the situation is obtained after the completion of the land works. The flow rate 7 increases due to the constraint of the flow by the earth rollers 5. Over time 7, the soil deposition, i.e. the alluvial soil 3, is eroded. The erosion starts at the edge of the recess 4 (Fig. 3). The soil is weighed. Since the main part of the alluvial soil 3 is made up of fine particles, they are carried away by a current of 7 seconds of rolling downstream, while they pass over a recess 4.

Above recess 4, an increase in the size of the flow section occurs. The flow rate decreases, fine particles are carried away further, and large soil particles precipitate and end up in excavation 4 as deposit b, therefore the excavation volume 4 of the soil can be taken several times smaller than the volume of the deposited soil 3 on the shallow. This shows the ratio of volumes in FIG. 2 and 3. The notch 4 is made not only in the superficial soil 3, but also in the primary soil 2.

The applied soil 3 of the ship's course at the overhang is eroded, starting from excavation 4, the wash zone moves to the top of the rolling until the deposition of the sedimentary soil 3 along the entire length of the rolling is washed off. The ship's turn gets the design shape, i.e. meets operational requirements.

But over time 7, not only the soil 3 is eroded, but also the soil of the ground rolls 5. Over time, the ground 6 fills the notch 4, the ground rolls 5 are deformed and washed away 5. It is deformed by the flow 7. The sediment starts flowing out of the stream 7. soil 3. A dredger is driven to the roll and works on creating excavation 4 and laying ground rollers 5 are repeated. Stacked at an angle a, passing direction 7, the shafts deform the flow. The flow rate of 7 increases. Ground washout begins 3.

If the roll has a very large length, two notches NsNs 1, 2 (Fig. 4) and more are arranged on it. Processes proceed in the same way as with one notch 4 (Fig. 1).

Claims (2)

1. A method of maintaining the waterway in a flowing reservoir, including removing the sediment from the channel on the rift, removing it beyond the boundaries of the channel and laying in the reservoir, characterized in that in order to reduce the labor intensity and cost of work on and the removal of the groundwater deposit from the channel on the rift if the axis of the channel of the channel coincides with a small angle of divergence with the direction of the natural flow in the reservoir, the soil deposition from the channel is removed by mechanized means at the bottom downstream of the roll-over boundary, where transverse excavation is carried out both in the soil sediment and in the primary soil, and the excavated soil is laid on both sides of the channel on the rift to the ramparts at an angle of their axes to the direction of the stream on the rift, soil however, deposition within the channel is washed off with a natural water flow, bounded on the sides by earth shafts and directed to the channel. 2. A method according to claim 1, characterized in that the cross recess is made at the lower roll both at the lower limit of the re-roll and above it in other re-sections. -  / 0 o  at fzg.2 FIG. J W .Jv H one g