SU861473A1 - Device for hydraulic deposition of underwater foundation of structure from lowering sections - Google Patents

Description

(54) DEVICE FOR SUBMITTING THE UNDERWATER BASE OF THE STRUCTURE FROM THE SURFACE SECTIONS

one

The invention relates to the field of hydromechanization and is intended for the washing of the suction dredger of underwater bases, structures of descending sections, such as tunnels or siphons.

A device is known for the washing of the subsea structure of the lowering sections, including a dredger, an underwater trolley mounted on rails laid on the top of the lowering section, with pipelines for flushing the ground and removing pumps equipped with horizontal nozzles 1.

A disadvantage of this device is the inefficient soil washout due to the complex construction of the tool body, including one pipe for washing the soil and two pipes for removing pumps.

The closest technical solution to the present invention is a device for inhaling the underwater structure of the descending sections, including an underwater trolley mounted on rails laid on the top of the descendent section, sump, working body in the form of slurry conduit of rigidly interconnected vertical and horizontal pipes.

the lower section envelopes, and the nozzles on the lower horizontal pipe. For washing the soil in and out of the pumps 2.

The disadvantage of this device lies in washing the base of the slurry pipeline with separately constructed and rigidly installed pipelines for washing the soil in and out of the pumps.

The aim of the invention is to increase the efficiency of the device by increasing the density of the washed soil and fQ changing the direction of the nozzles in the wash zone.

The goal is achieved by the fact that the lower horizontal pipe of the slurry pipeline is rotatably installed along the longitudinal axis and is made with a 15 cross sectional area decreasing from the edges to the middle, while the lateral surface of the lower horizontal pipe has the shape of a single-cavity hyperboloid and this pipe has hinges.

20

FIG. 1 shows the proposed device in the plan; in fig. 2 - the same, side view; on fig 3 is the same, section A-A in FIG. one.

Claims (3)

The device consists of an underwater trolley 1 mounted on rails 2, laid on the top of the descending section 3, and a suction pump 4. The working part of the device contains a slurry pipe enveloping the cross section of the descending section 3 consisting of vertical pipes 5 and the lower horizontal pipe 6, on which nozzles 7 are placed for washing the soil into the base 8 and removing the pumps 9. The nozzles 7 are made with the same cross-sectional area and mounted on the pipe 6 at the same level. The pipeline is connected to the suction pump 4 by a flexible hose 10 and a main pipeline 11 placed on the pontoons 12. The lower horizontal pipe 6 is provided with ends with joints 13 and is installed rotatably in the direction of the arrows 14. On the underwater trolley 1 a stepper motor 15 is installed, for example, with a chain motor transfer 16. Pipe 6 is made with a variable cross-sectional area, decreasing from the edges to the middle. The side surface 17 of the pipe 6 has the shape of a single-cavity hyperboloid. The device is equipped with winches 18 and cables 19 with the possibility of movement in the direction of the arrow 20. Grun for lavage is placed in trestle 21. The device for lavish the foundation of the structure of the descending sections works as follows. For the washing of the base, a sandy soil of uniform granulometric composition is used, which does not contain large inclusions, stones and fuels. As a rule, such a ground is mined from the bottom of a watercourse when clearing waterways and transported by barges or tents. From the scows, 21 soil for lather are pumped by suction pump 4 through the main slurry pipeline II and flexible hose 10. The pulp enters the vertical pipes 5, the lower horizontal pipe 6 flows out of the nozzles 7 and forms the base 8. The base 8 is washed in sections. Through pipe 6, the slurry is transported with variable flow along the path. The flow of pulp in the pipe 6 is reduced from the extreme nozzles 7 to the middle. Making the pipe 6 with a variable cross-sectional area decreasing from the edges to the middle ensures the flow of the same pulp flow from all the nozzles 7. The flow of the same flow of solid and liquid pulp components from all the nozzles 7 is achieved by making the side surface 17 of the tube in the form of a single-cavity hyperboloid. The curvature of the side surface 17 of the pipe 6 is determined by calculation. When the pulp is released under the bottom of the downcomer section 3 on the nozzles 7 of the lower horizontal pipe 6, the efficiency of the base in the base 8 increases and the uniformity of the soil density in it increases. The density of the soil at the bottom of the base 8 also increases with the rotation of the lower horizontal pipe 6 with nozzles 7. The pipe 6 with nozzles 7 is rotated using a shaggy electric motor 15 and a chain gear 16. Successively turning the pipe with nozzles 7 in the direction from the base of the trunk and the bottom of the section will increase layers of washed soil and the entire base 8. The angle of rotation of the pipe 9 with nozzles 7 when all-around base 8 is all around is 60-80 °. The layers of the base are washed with successive rotation of the pipe 6 with nozzles 7 at an angle of 10-15 °. After completion of the inlaid area of the base 8, the pipe 6 with nozzles 7 is rotated through an angle of 180 ° and water is fed into the slurry pipeline to remove pumps 9 from the bottom of the trench. Water for removal of pumps 9 is suctioned by suction pump 4 from the side and pumped through the main slurry pipeline 11, flexible hose 10, vertical pipes 5, lower horizontal pipe 6 with nozzles 7. Water, flowing under pressure from nozzles 7, erodes pumps 9 and clears them sole of the trench. The scouring of the pumps 9 is carried out in those cases when the watercourse transports a significant amount of silty, silty and clay particles and they are deposited on the bottom of the trench. Pumps of these particles have a low bearing capacity and their presence at the base reduces the density of the deposited soil. The device is moved downstream section 3 by means of winches 18 and cables 19 in the direction of arrow 20. Then the barber 21 is fed to the suction pump 4 with soil and the next base portion 8 is washed. The control over the process of flushing, turning of the pipeline and washing out of the pumps is carried out using known devices an ultrasonic echo sounder (not shown), the acoustic antenna of which is mounted on the pipe 6. The electric signals of the echo sounder are transmitted to the control of the dredger 4. Claim 1. The device for the alluvial underwater is based Constructions from downcomer sections comprising dredger, underwater trolley. mounted on rails laid on the top of the outlet section, the working body in the form of a slurry duct of rigidly interconnected vertical and horizontal pipes, enveloping the outlet section, and a nozzle on the lower horizontal pipe, characterized in that, in order to increase the efficiency of the device by increasing the density washed soil and changing the direction of the nozzles in the zone of alluvium, the lower horizontal pipe of the slurry pipeline is installed with the possibility of rotation relative to the longitudinal axis and is made with variable cross-sectional area decreasing from the edges to the middle. 2. A device according to claim 1, characterized in that the lateral surface of the lower horizontal pipe has the shape of a single-cavity hyperboloid. 3. A device according to claim 1, characterized in that the lower horizontal pipe has hinges. Information sources, taken into account during the examination 1. Patent of England No. 1197159, cl. E 02 D 15/10, published 1970. 2 USSR Author's Certificate No. 682602, cl. E 02 D 15/10, 1979. five/ / X W. /)BUT