JPS60128090A - Mooring method of buoyant body - Google Patents

Abstract

PURPOSE:To moor a buoyant body sufficiently to cope with difference in water level by providing pulleys on the both sides of said buoyant body, which is buoyantly provided on the water surface of a dam, etc. and, after putting one end of each mooring cable, the other end of which is fastened to each land part on the both sides of said buoyant body, around said pulley, connecting said end of each cable to a weight in water provided under said buoyant body. CONSTITUTION:In order to moor a barge, on which a solar generator, etc. is installed, in position on the water surface of a dam, pulleys 3 are provided on the both sides of a buoyant body 2, i.e., the barge to be buoyantly installed, and one end of each mooring cable 6 is fastened to each land part 5 on the both sides of the buoyant body 2, through a fixing stake 4. After each mooring cable 6 is put around each pulley 3, the other end of the each cable 6 is fastened to a weight 7 in water provided under the buoyant body 2. Thereby, the mooring cables 6 can always be held with tension, even if difference in water level takes place, securing sufficient mooring for the buoyant body.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to water surfaces near land such as dams and rivers,
Or it relates to a method of mooring a floating body in a place where the bottom surface changes drastically.

[Prior art]

For example, floating birch etc. on the water surface of a dam,
When installing equipment such as a solar power generation device on this floating body,
It is necessary to connect this device with various devices installed on land using cables, etc., and the original floating body must be maintained in a fixed position for security reasons.

However, depending on the water usage conditions of the dam, there are places where the water level fluctuates by 30 to 40 meters or more even under normal circumstances, so in order to moor the floating body at a fixed position, the mooring cables must be adjusted to the fluctuations in water level. It is necessary to wind it up and unwind it accordingly.

Thus, when mooring a floating body under conditions where the water surface fluctuates significantly, a special mooring device is required.

However, there are almost no floating body mooring devices that are used in the conventional and six types of applications, and if we were forced to choose an auto-tension winch, this winch is driven using an electric motor or hydraulic motor. Therefore, power such as electricity or an internal combustion engine is inevitably required.

Generally, dams are constructed deep in the mountains, and there are often no wiring facilities, but the auto-tension winch needs to be operated at all times, so supplying power to this device is a problem. However, there were problems in terms of equipment installation and maintenance.

Furthermore, there is an example of this type of mooring method where one side is a fixed rope and the other side is a free rope using pulleys and weights. This is corrected by the mooring tower provided, but the larger the water level difference, the larger the scale of the mooring tower, which increases costs.

Furthermore, the above method has a problem in that the floating body shifts by the horizontal length of the cable length corrected by the mooring tower when the water level changes.

[Purpose of the invention]

Therefore, the present invention has been made to solve the above-mentioned conventional problems, and by using a combination of a pulley and an underwater weight in a method of mooring a floating body, the underwater weight can be used to reduce the horizontal external force applied to the floating body. The object of the present invention is to provide a method for mooring a floating body that can always be fixed at a predetermined position by counteracting the horizontal component of the vertical force with a simple structure.

[Structure of the invention]

That is, in the method of mooring a floating body of the present invention, pulleys are provided on both sides of a floating body floating on the water surface, and each other end of a mooring cable, one end of which is fixed to the ridges on both sides of the floating body, is connected to the mooring cable as described above. The floating body is constructed by winding it around each pulley and connecting it to an underwater weight disposed at the bottom of the floating body, so that the floating body is always fixed at a predetermined position.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.First, the drawing is a schematic diagram of a mooring device according to an embodiment of the present invention, and shows a mooring device on both sides of a floating body 2 floating on the water surface of a dam 1. A pulley 3 is provided, and each end of a mooring cable 6, one end of which is fixed to a fixed stake 4 provided on the ridges 5 on both sides of the floating body 2, is wound around each pulley 6, and the floating body 2 is It is connected to the center of the upper part of an underwater weight 7 arranged at the lower part of the body.

(8) The floating body 2, which is at the position indicated by the solid line at HWL, which indicates the high water level in the figure, will descend to the position 2' of the broken line at the low water level, indicated by LWL, but at this time, the floating body 2 is moved by the wind. Even if the mooring line 6 on one side turns into sludge due to horizontal forces such as waves, the horizontal component of the vertical force indicated by W of the underwater weight 7 will cause the floating body 2 to move.
acts to always maintain a fixed position. .

Note that the weight of the underwater weight 7, indicated by W, is calculated as appropriate from the horizontal force acting on the floating body 2.

[Effect]

In other words, when mooring a large floating body 2 to a pumped storage power generation battery or the like with a large water level difference, unless the floating body 2 is moored on land or underwater and the deviation of the mooring cable 6 due to the water level difference is corrected in some way, the floating body 2 will be Although the mooring position changes, in the present invention, this deviation of the mooring line 6 can be automatically corrected by the combination of the underwater weight 7 and the pulley 3, and the position of the floating body 2 can be fixed at a predetermined position. .

[Effects of the present invention]

(4) Therefore, in the floating body mooring method of the present invention, the combination of the pulley and the underwater weight allows the floating body to be moored even when a difference in water level occurs or when a large horizontal force is applied to the floating body and the floating body tries to shift from its fixed position. The horizontal component of the vertical force of the underwater weight acts to counteract the external force, keeping the floating body in place.

In particular, the present invention does not require a large-scale structure such as a mooring tower, so the construction period is shortened, and since no power is used, it is highly economical.

Note that the present invention can be effectively applied to a floating body that is installed in a place where there is a particularly large difference in water level, such as a reservoir for pumped storage power generation in a mountainous area.

[Brief explanation of the drawing]

The drawing is a schematic diagram of a mooring device in an embodiment of the present invention. 2.2'... Floating body, 3... Pulley, 4... Fixed pile,
5...Round part, 6...Mooring cable, 7...Underwater weight.

Claims (1)

[Claims] In addition to installing pulleys on both sides of the floating body floating on the water surface,
The other ends of the mooring cables, each of which has one end fixed to the ridges on both sides of the floating body, are wound around each of the above-mentioned pulleys and connected to an underwater weight placed at the bottom of the floating body. A method of mooring a floating body, which is characterized by always fixing it in a predetermined position.