SU1044724A1 - Method of depositing soil onto recessed areas - Google Patents

Abstract

1. METHOD OF FLOWING REDUCTIONS, including the supply of a vortex-carrying stream and passing it through a lowering, characterized in that, in order to evenly sediment the sediment in a lowering, the suspension weighs alternately from the feed outlets, arrange half-ribs, located in plan with several longitudinal rows against the flow and forming the flow expanding in the direction of the flow of the strip, while semi-ducts belonging to the co-bands are arranged connected at an angle ..

Description

2. The method according to claim 1. about the fact that, in order to reduce the flow rates of the suspended flow and intensify the silting, the distance in the flow direction of the suspended flow between the rows of half ponds

increase, and between popuprudami reduce.

3. The method according to paragraphs. 1 and 2, I will distinguish u and. With the fact that poparazdudy, adjacent to the border lowering, arrange with slots.

The invention relates to hydraulic construction, and specifically to methods for blasting depressions during leveling, groundwatering, and silting of lake sedimentation tanks and reservoirs.

There is a known method of washing in structures with erection of embankment dams, supplying a weighing stream to a thrust prism of the structure and discharging clarified water. The prism is subsequently increased along the bottom slope of the structure by forming a channel in the previously washed one. ground fl3.

The disadvantage of this method is the uneven deposition of sediments over the area, both in the granulometric concentration of the soil and in the thickness of the alluvium layer. In addition, the channel in the body of the stop prism must be constantly maintained in working condition, periodically extending and clearing it from silting, which complicates the work.

The closest to the invention to the technical essence is the method of omnibus of depressions, including the supply of a weighing flow and passing it through a decrease in G 2.

However, this method also does not provide a uniform sediment deposition, especially with a wide lowering width. In addition, a large soil ablation with waste water reduces the effectiveness of this method.

The purpose of the invention is to ensure uniform sediment deposition in a fall.

This goal is achieved by the fact that, according to the method of wiping down lows, including the supply of a weighing flow and passing it through a lowering, the flow is produced alternately from supplying releases,

semi-ponds located in plan by several longitudinal rows against the flow of the stream and forming strips stretching along the flow direction, while the semi-ponds belonging to adjacent strips are arranged at an angle.

In addition, in order to reduce the flow rates of a suspended flow

and intensification of silting, the distance in the direction of flow of the suspended flow between the rows of the semi-pile is increased, and between the half-ponds is reduced.

In this semi-ponds, adjoining

down to the border, arranged with slits.

On the phage. 1 shows a lowering circuit, a plan view; in fig. 2 is a section A-A in FIG. one.

FIG. Figures 1 and 2 are designated: Slide 1, sub-warehouses 2, lanes 3, feed inlets 4, temporary bridges 5, waste channel 6, slots 7.

The method is carried out as follows.

Preliminary, in decreasing 1, several longitudinal rows of semi-ponds 2 are formed, forming stripes 3, spreading out in the plan in the direction of flow of the suspension flow. Semi-ponds 2 are arranged in a plan against the flow with a distance between them, decreasing in the direction of

flow streams, i.e. U, -4 ,, L,, L,:,. In this case, a half-pond 2 belonging to adjacent lanes 3 is arranged connected at an angle of t56 110-120 °. Weighing flow alternately served

to each of the strips 3 as they are silted from the previously arranged supplying outlets 4. At the same time, only one "3 outflows 4 work, the rest are blocked by temporary bridges 5. The clarified water is discharged through channel 6. To drain water from the space between adjacent to the boundaries of lowering, arrange slots 7.5

The device, located in the plan against the flow of suspended sediment, allows to stratify the flow and direct the bottom currents containing a significant amount of sediment between the subsurfaces. As a result of a decrease in the flow velocities, an intensive siltation of the space between the sub-subsurface occurs. The expansion of the strip in the plan will help the uniform deposition of nano-

along its length due to the fact that, as sediment is deposited, the amount of soil for it also decreases. transportation needs a lower flow rate, and, accordingly, a larger cross section of its 20.

The length of the semi-bucket 2 is established by calculations, based on the specific dimensions of the decrease 1, lanes 3 and the flow rate of the suspension of the carrier stream 25. The width of the strip 3 in the initial section is determined from the conditions for ensuring the transportation of the supplied soil to the lowering, and at the end of the strip 3 - based on the non-blurring value JQ

speed.

The distance LC between semi-ponds, equal to three or four lengths of the latter, should decrease in the direction of flow due to the fact that during the expansion of the strip, the length of the semi-pond decreases. The holes in the semi-ponds adjacent to the lowering boundaries are designed to skip the bottom currents, which contributes to a more uniform sedimentation of sediments due to the exclusion of flow turbulence.

When washing downs according to the invention, the effect is achieved due to the reduction in the amount of planning work.

silted surface during the reinforcement of bases and alluvium of areas, as well as by reducing the entrainment of soil from the waste water to it. In addition, the use of the invention for distributed sediments in a reservoir or lake and a settling tank will significantly increase their service life due to uniform silting over the area,

For example, a comparison of the alignment options for the base of a pressure ground structure shows that using a solid flow of a suspended river flow for these purposes using the proposed method can reduce the cost per unit of work by 5-6 times.

Claims (3)

1. A METHOD FOR REMOVING THE DECREASES, including the supply of a weighted flow and its passage through the lowering, characterized in that, in order to uniformly deposit sediments in the lowering, it feeds the weighted flow one by one from the inlet outlets, arrange halfway I D1, located in the plan several longitudinal in rows against the tide. flow and forming expanding on. the direction of the flow stream of the strip, while the half-dams belonging to adjacent stripes are arranged connected at an angle. . _β <s I 2 "The method according to π. 1, the main point is that, in order to reduce the flow rates of the suspended flow and to intensify the siltation, the distance in the direction of the flow of the balanced flow between the rows of semi-aapruds is increased, and between poperezaprudy is reduced. 3. The method according to PP. 1 and 2, distinguished by the fact that half aapruds adjacent to the lowering border are arranged with slots.