JPH09177057A - Method of treating water sediment, and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the crushing work for water sediment by partitioning the inner part of a lower end-opened frame by a partitioning wall, settling it to partition and enclose a prescribed range, and injecting high pressure jets from injection nozzles provided on the inner wall of the lower end-opened frame so as to be crossed and opposed. SOLUTION: A lower end-opened frame 1 made into a box is formed of three sections of lower end-opened frame units 1a, 1b, 1c. The partitioning wall 2 of the lower end-opened frame 1 has a notch 21 on the lower end, and a tip 2 on the lower end-opened frame 11 lower end is formed so as to be easily bitten and fitted into a sediment layer. Further, the partitioning tip 22 has a force feed pipe 3 of high pressure fluid along the wall surface, and a lower injection nozzle 31 is arranged on the lower end, so that the fluid is injected downward to fit the lower end-opened frame 1 while crushing and excavating the sediment layer, when the lower end opened frame 1 is lowered and fitted to the sediment layer. A vibration generator 5 is arranged on the upper part of the fitted partitioning wall, so that a vibration is imparted to the sediment layer fitting end to promote the smooth advance of the frame body into the sediment layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for treating hard and brittle massive underwater deposits such as oyster shells, shells and remains of dead coral deposited in water.

[0002]

2. Description of the Related Art Conventionally, for this type of underwater sediment treatment, a method of scooping up on a carrier by a club bucket ship and dumping it in the deep sea has been performed. A method of disposing a high-pressure water jet nozzle and a stirring blade downward at the lower end of the tank, suspending it from above and descending onto the sedimentary layer, and crushing the sediment by rotating the high-pressure water and the stirring blade (Japanese Patent Publication No. 3-8737) Began to take place.

[0003] In this treatment method, a suspension cylinder in which a rotary shaft tube of a stirring blade is supported reaches a deposition layer, and the rotary shaft tube is rotated. At the same time, high-pressure water is jetted from a downward nozzle provided in the shaft tube. The jetted high-pressure water also rotates with the rotation of the shaft tube, and breaks the lower sedimentary layer into fragments.

[0004]

However, the processing method based on the rotation of the stirring blade includes a rotating device, a reduction gear,
Heavy equipment, such as bearing mechanisms, must be supported and cannot be avoided in water to avoid problems such as gear case seals protecting these mechanisms, contamination by oil leaks, and equipment wear.

Since mechanical stirring is the main focus,
The only way to increase the simultaneous construction area is to increase the size of the hydraulic system. However, the simultaneous construction area is limited by problems such as measures against oil leakage in the gear case due to run-out of the stirring blades and an increase in maintenance costs.

[0006]

Means for Solving the Problems The present invention addresses the above-mentioned problems, in which a lower end opening frame is settled to enclose and surround a predetermined range, and an injection nozzle is provided on the inner wall of the lower end opening frame. By injecting high-pressure jets in a crossed and opposed manner,
A stirring jet flow is generated in the surrounding compartment to crush the underwater sediment in the compartment.

Further, the inside of the lower end opening frame is partitioned by partition walls, and a plurality of injection nozzles for spraying in the intersecting and opposing directions are provided inside each partition wall, and the lower end opening frame is composed by combining or joining units. In this way, the simultaneous construction area can be dramatically expanded.

Further, the lower end opening frame is formed as a box, and a vibration generator is provided on the upper part of the fitting partition wall so that the lower end opening frame is settled down by injection from the lower end of the fitting partition wall and the fitting partition by the vibration generator. The partition wall is configured to be positively inserted into the deposition layer by the oscillation operation of the wall.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a lower end opening frame configured in a box body, which is configured by joining units 1a, 1b, and 1c on site and dividing into three parts. The 1b side partition wall of 1a and the 1c side partition wall of 1b are Since they are common, the partition walls of either unit are cut out before joining, and the partition walls of either unit are configured to become common walls by joining.

Regarding the unit structure, it goes without saying that the boxes may be simply arranged without adopting the above-mentioned structure, and if the common wall parts are joined while being doubled, the weight is reduced. Although it is heavy, there is an advantage that the joining is free and the joining work is easy.

Further, the units 1a, 1b, 1c of the lower end opening frame
By further downsizing and composing 1d, 1e, 1f, and 1g vertically and horizontally to form one composite box, the crushing operation can be performed finely.

The partition wall 2 of the lower end opening frame 1 is provided with a notch 21 at its lower end, and a tip 22 formed by this is inserted so that the deposit layer A is hard to be inserted.

Further, at the tip of the partition wall 22, a lower injection nozzle 31 provided in the high-pressure fluid pressure-feeding pipe 3 piped along the wall surface is opened, and the lower end opening frame 1 is downwardly fitted into the deposit layer A. Sometimes the lower end opening frame is inserted while crushing and excavating the sediment layer by downward injection.

Further, a vibration generator 5 is provided above the fitting partition wall.
Is provided, and when the lower end opening frame 1 is downwardly fitted, vibration is applied to the deposit layer fitting end to promote smooth entry of the frame body into the deposit layer A.

Inside the lower end opening frame 1, two systems of pressure feed pipes, a pressure feed pipe 3 and a pressure feed pipe 4 to which the high pressure fluid from the high pressure pump 7 is switched and supplied by a switching mechanism 7 are arranged along the wall surface, The system of the pressure-feeding pipe 3 is connected to the lower injection nozzles 31, 31 ... Opening to the tip 22 of the partition wall, and the system of the pressure-feeding pipe 4 is set at the lower edge of the opening of the opposing partition walls 2a, 2b of the frame 1. .. connected to the crushing nozzles 41, 41 ..

The upper portion of the lower end opening frame is constructed as a suspension structure 6 which is suspended and lifted by a suspension mechanism P such as a crane loaded on a ship S or the like, and suspended from the upper portion of the underwater sediment layer onto the sediment layer. It is like this.

The processing apparatus configured as described above is suspended by the suspension mechanism P on the underwater sediment layer A, and when it is allowed to settle in the water and reaches the sediment layer A, the vibration generator 5 is used to open the lower end opening frame. While vibrating the deposit layer insertion end of No. 1, the high-pressure water stream is jetted from the lower jet nozzle 31 to crush the deposit and advance the frame body into the deposit layer A, and the predetermined range of the deposit layer is within the frame. Enclose the compartment.

This suspended settling work is performed in the case of a 3-compartment lower end opening frame having a width of 4 meters and a length of 6 meters, and a weight of 15
Ground pressure of 5.3 kg / cm ² on the sediment layer due to tons and oyster shells, and the high-pressure water flow from the lower injection nozzle 31 is 50
Sedimentation for enclosure of the compartment was possible at kgf / cm ² .

Upon completion of the box settling for compartment enclosing,
The high-pressure water flow from the high-pressure pump 7 is switched by the switching mechanism 8 to the system of the pressure-feeding pipe 3 and the pressure-feeding pipe 4, and is supplied to the injection nozzle.
It is sprayed from 41 and crushes and stirs the deposits in the surrounding area. Note that this switching operation does not necessarily have to be performed, and in some cases, downward injection and crushing injection may be performed simultaneously.

The high pressure water flow from the crushing nozzle 41 in this case is
When 150 kgf / cm ² , 800 L / mim and 8 holes with 4φ nozzles were installed in one partition wall for about 1 minute, almost complete crushing and stirring of the deposit was performed.

The crushing and stirring of the sediment in the surrounding compartment is carried out by the pressure pipe 4.
By the automatic switching valve set to the system, first, the injection nozzle 41 in the lower end opening frame unit 1a is operated to inject, and when the crushing and stirring in 1a is completed, 1b and 1b are completed, 1c and the deposition in the surrounding compartment are sequentially The crushing and stirring of the material is carried out.

Sequential construction by this automatic switching valve is carried out as necessary, and depending on the construction situation, the pressure of the high-pressure pump is increased to carry out spalling injection in all sections at once, thus spalling a wide range of sediment layers at once. You can also do

When the crushing and stirring of the deposits in the surrounding compartments of the units 1a, 1b, 1c are completed by the lower end opening frame, the lower end opening frame 1 is lifted up by the suspension mechanism P, and further the lower end opening frame 1 is placed in the adjacent compartment.
Is settled and the same construction is performed to treat the underwater sediment.

[0024]

[Brief description of the drawings]

FIG. 1 is an overall side view showing an underwater sediment processing state according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a situation in which a lower end opening frame is unit-combined.

FIG. 3 is a perspective view showing a spraying state of a crushing nozzle in one partition wall.

FIG. 4 is a vertical sectional side view of a lower end opening frame partitioned by a partition wall.

FIG. 5 is a bottom view of the lower end opening frame showing a state in which the unit structure of the lower end opening frame is downsized and connected vertically and horizontally to form a single composite box.

[Explanation of symbols]

 1 lower end opening frame 1a, 1b, 1c lower end opening frame unit 2 lower end opening frame partition walls 2a, 2b opposing partition walls 21 lower end opening frame lower end slit 22 lower end opening frame lower end tip 3 to lower injection nozzle High pressure fluid pressure feeding pipe 31 Lower injection nozzle 4 High pressure fluid pressure feeding pipe to crushing nozzle 41 Crushing nozzle 5 Vibration generator 6 Suspended structure of lower end opening frame 7 High pressure pump 8 High pressure water flow switching mechanism A Sediment layer G Water surface P Suspension mechanism S Barge

Claims (5)

[Claims] 1. A lower end opening frame is settled from an upper part of an underwater sediment layer to partition and surround a predetermined range, and high-pressure jet streams are cross-faced and jetted from jet nozzles arranged on the inner wall of the lower-end opening frame. A method for treating underwater sediments, characterized by crushing the underwater sediments in the enclosed area 2. An underwater deposition characterized in that a plurality of injection nozzles for injecting inward and inward are provided on the inner wall of a lower end opening frame provided with a suspending mechanism at the upper part, and a lower injection nozzle is set at the lower end edge. Object processing equipment 3. The apparatus for treating underwater sediment according to claim 2, wherein the interior of the lower end opening frame is partitioned by partition walls, and a plurality of spray nozzles for spraying in mutually intersecting directions are provided inside each partition wall. 4. The apparatus for treating underwater sediment according to claim 3, wherein the lower end opening frame is constructed by combining or joining units. 5. The apparatus for treating underwater sediment according to claim 2, 3, or 4, wherein the lower end opening frame is configured as a box body, and a vibration generator is provided above the fitting partition wall.