SU987045A1 - Method and apparatus for working soil by dredge in wintertime - Google Patents

Description

(54) METHOD FOR DEVELOPING A GROUND SURGER

IN WINTER TIME IN CAREER AND DEVICE

one

The invention relates to hydromechanization and is intended for the development of soils in underwater fences in the winter.

There is a method of developing a soil dredger in the winter, which includes installing a dredge in a reservoir, forming a lane around the dredger, working out the soil and maintaining the lane 1.

The disadvantages of this method are the need to use additional mechanisms for the formation and maintenance of the lane and the reduction of the capacity for pressure hydraulic transport, since the temperature of the slurry is low due to the intensive cooling of water in the reservoir.

A device is known for implementing a method for developing a soil dredger in winter, which is a standard 1J dredger equipment.

However, such a device is characterized by drawbacks inherent in all construction-type damsters.

The closest to the present invention is a method for developing a soil dredger in winter, which includes the formation of a pit connected with a slit with the implementation of it.

dredging, designation of a pit in a quarry, installation of a dredge in the bottomhole, laying of pipes into a slot, closing of a slot with soil, and working out of a soil in the bottomhole while maintaining the water level in the pit below the level of the groundwater 2.

The disadvantage of the method is the lowering of the temperature of the slurry in the case when the flow of warm ground water that is filtered through the bottom soils does not compensate for the flow of water taken from the embrasure, and the shortage in the bottom is filled by inflow from the reservoir.

A device is known for implementing a method for developing a soil dredger in winter, which is a pipe system laid on the bottom of a slot before closing a slot with a soil. One ends of the pipes are in the reservoir, others are in the open pit 2.

A disadvantage of the known device is the entry through the pipes not only of the bottom water, but also from the layers average in the height of the reservoir, since there is an intensive water intake into the ends of the pipes, concentrated in the same vertical section and in close proximity to each other. The temperature of the middle water layers is lower than that of the bottom layers. In addition, water from the reservoir is not supplied to the bottom of the bottom, to the location of the suction area of the dredge, but to the slot area facing the pit. On the way to the bottom, this water is mixed with cooling medium layers of pit water. All this leads to a significant cooling of water entering the bottom from the reservoir.

The purpose of the invention is to increase the efficiency of soil excavation in the face when warm groundwater enters the quarry by filtering it through the soil and filling the pit water deficit with warm water from the reservoir.

The goal is achieved by implementing the method of developing a soil dredger in winter in a pit connected with a reservoir, including marking the bottom of a quarry, installing a dredge in the bottomhole, laying the pipe in the slot, closing the slot with the ground and developing the soil in the bottom while maintaining the water level in the quarry below the level of the groundwater, the flow from the reservoir is made directly to the bottom of the pipe system by gravity with warm bottom water collected from the area of the bottom of the reservoir.

In a device for implementing the method of developing a soil dredger in winter time in a quarry that includes a piping system for supplying water to a quarry from a reservoir, the piping system is composed of parallel water intake pipes with water intakes in the walls located at the bottom of the reservoir and a thermally insulated main pipeline with an end face located at the bottom of the bottom, and the water intake windows on the water intake pipes have dimensions that increase with distance from the main pipeline.

FIG. 1 shows a device, side view; in fig. 2 - the same, top view.

The scheme includes reservoir 1, pit 2, a jumper between the reservoir and pit 3, slot 4 in lintel 3, bottom 5 in pit 2, water intake pipes 6 with water intake windows 7 in the walls, trunk pipeline 8 with water outlet end 9, valve 10 with handwheel 11 on pipeline 8, dredger d 12 with suction 13 and pressure 14 pipelines, curve 15 of despression (groundwater level), jumper 16 in slot 4.

Water intake pipes 6 are located at the bottom of the reservoir 1 for collecting warm bottom water from the bottom area, since at the bottom of the reservoir the water has the highest temperature. Diversion windows 7 in the walls of the pipes 6 are made with dimensions that increase as their distance from the main pipeline increases. Thus, the water intake is carried out at low speeds, at which water from the upper, colder layers of the reservoir to the windows is excluded.

The main pipeline 8 according to the scheme shown in FIG. 1 and 2, laid along the bottom of the slot 4 between reservoirs, i.e., practically insulated. If it is laid on the day surface, it should be insulated, since reducing the temperature of the slurry by 0.1 ° C reduces the possibility of transporting the slurry by 100 running meters. horizontally.

The outlet end 9 of the pipeline 8 is introduced into the bottom and placed at the bottom of the bottom to supply warm bottom water closer to the suction device 18 dredger and 12.

The device works as follows.

They designate in the pit 2 the bottom 5. The pipe system is laid down 6, 8, 9 and 10. The jumper 16 is raised in the slot 4. The dredger is placed

0 12 in the bottomhole 5. The suction pipe 13 of the samsnard 12 is lowered to the bottom of the bottom 5 and the development of the soil is started by free suction (Fig. 1 and 2) when the soil in the bottom is easily eroded, or with the use of disintegrating agents, if the soil is not easily diluted. The dredger 12 formed with the slurry is transported via the pressure pipe 14 to the installation site.

The dredger is taken and removed from the intake of a lot of water. So, the dredger house 300-

0 40 per hour takes more than 3 thousand. M of water. Water is replenished in the bottomhole by filtering through the walls (through the bottom and slopes) of the bottomhole when the water level in the bottomhole is lower than the groundwater level in the ground (Fig. 1).

However, the filtration rate through the sands, for example, is many times less than 1 cm / s. At low filtration rates, a situation is often created when the dredger is removed from the intake of more water than it flows through filtration. AT

In this case, the valve 10 is opened. Water from an unlimited reservoir through pipes 7 and 8 rushes from water I to bottom 5, since the water level in the reservoir 1 is higher than the water level in the bottom 5. By adjusting the magnitude of the opening of the valve, when the inflow of water due to filtration through pipe 8 is equal to the flow of water from the bottom of the dredger house 12.

The application of the proposed method and device for its implementation provides for taking warm bottom water from a reservoir through windows in water intake pipes with a low flow rate, minimal heat loss by water as it flows through the main pipeline, since it is thermally insulated, warm bottom water is discharged to the bottom, t. that is, the minimum heat loss from the outflow end 9 of the pipe 8 to the suction device 13 of the dredger 12.

Claims (2)

Claim 1. A method for dredging soil in winter time in a quarry connected by a slit to a pond, including designating a face in a quarry, installing a dredger in a face, laying pipes into a slot, closing the slit with soil and developing soil in a face while maintaining the water level in the quarry below the ground level water, characterized in that, in order to improve development efficiency of soil in the bottom in a warm Incoming ground water pit ¹⁰ by its filtration through the soil and fill the water shortage in a quarry heat the supply of water from a doem, produce flow from the reservoir directly into the face of the pipe system by gravity warm bottom water collected from the bottom area of the reservoir. 2. A device for implementing a method for developing soil by a dredger in winter time, including a pipe system for supplying water to a quarry from a reservoir, characterized in that, in order to ensure the supply of warm bottom water from a reservoir to the quarry, the pipe system is composed of 5 parallel water intake pipes with water intake windows in the walls located at the bottom of the reservoir, and a heat-insulated main pipeline with an end located at the bottom of the bottom, and the water intake windows have dimensions that increase as they move away from the main pipe boprovoda.