SU140371A1 - The way to close the river beds - Google Patents

Description

Basically auth. St. No. 97520 describes a method for blocking the river bed by injecting by overloading the stream with washed sandy-soil mixture. The mixture is fed at overlapping dispersed across the river bed.

The present additional invention extends the scope of the main invention by reducing soil removal. This is achieved by blocking the gap through simultaneous washing and filling of sandy gravel with face pulp release into the water against the current.

FIG. I shows the scheme of drying, blocking of the channel by the proposed method in the plan; in fig. 2 is a longitudinal section along the lintel axis; in fig. 3 - alluvium and soil dumping in the passageway in cross section.

At the initial stage, the channel is constrained to be cut through from both banks of the river by face washing of soil from the pulpwaters, which build up along the washed soil along the lintel axis.

After cramping, the channel, i.e., the washout of the jumpers 2 before the breakout, at the end sections of the latter adjacent to the clearance, all reserves of soil 3 are filled with the same ground dredgers. Plot 4 is marked in the middle or at the riverbank, depending on the geology of the channel bed and the conditions of navigation during the period of overlap.

The width of the pier area is assumed to be equal to / ДО TO / 4 width of the river, which is caused by the appearance of a sweep flow velocity in the range of 0.7-1.0 m / s for sandy soils and 1.0-1.5 m1s for gravelly soils.

The closure of the gash is carried out by supplying the soil from the pulp lines 5 that are afloat.

.N. 140371 --- 2 The ends of the slurry lines 5 (connected by means of rotary ball joints) are lowered into the water against the current and, as the alluvium is washed, the jumpers are raised closer to the surface of the water.

Simultaneously with the alluvium, intensive soil dumping was made with bulldozers 6 of the previously accumulated reserves 3.

The pulp, released against the flow, overcomes the energy of the flow at a certain part of the block and thus creates a damping zone, which ensures the deposition of bulk and washed soil with a slight entrainment.

Due to the resistance of the counter flows of the pulp and due to the constraint of the cross section of the gap, as well as due to the resistance of the underwater surface of the erected jumper, backwater is created 7, which provides side discharge of the flow through the spillway structure, as well as accumulation of part of the flow in the upstream of the river.

In this way, the width of the channel bed of the aisle is simultaneously constrained while its bottom is shallowed.

The proposed method is recommended for conditions where there are reserves of sandy gravel near the construction site and there is no local stone to close the river bed with a banquet.

In particular, a method has been proposed for cutting off the channel of the Kama River at the Botkin Hydroelectric Station.

The Ministry of Power Plant Construction has accepted a proposal from the authors for experimental verification.

Subject invention

The way to close the river beds by aut. St. No. 97520, that is, so that, with the aim of reducing the soil removal, the overlap of the hole is made by simultaneous alluvium and dumping of sandy-gravelly soil with face pulp release into the water against the current.