JP3754929B2 - 浚 渫 Method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dredging method for efficiently removing seabeds, lakes, and river deposits.
[0002]
[Prior art]
At the bottom of the sea, lakes, rivers, etc., sediments and sediments that have flowed in will cause deterioration of water quality, deterioration of the environment of the sea floor, lake bottom, river bottom, and water depth. Work is required.
[0003]
The conventional dredging method consists of a pile bed scraping mechanism attached to the trolley via an arm so that it can move up and down, a pump for pumping the scraped mud, and equipment such as a mud tank Each time the sedimentary layer is scraped within the operating range of the scraping mechanism, the trolley is moved, and the scraped mud is stored in a mud tank and then pumped to the above-ground processing equipment through the drainage pipe. Like to do.
[0004]
[Problems to be solved by the invention]
By the way, the dredging method as described above is to change the scraping position by moving the carriage every time the scraping mechanism is operated. The movement is not particularly related. For this reason, when the scraping position is changed, the trolley is moved excessively, so that there is often a scraping residue in the deposited layer.
[0005]
In addition, it takes time and effort to move the carriage to change the scraping position, which is a major factor in reducing the efficiency of dredging work.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a dredging method capable of performing dredging in which no deposit is left in the deposited layer and improving the efficiency of dredging work.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a spat for stopping the rear portion of the trolley to the ground on both sides of the rear portion of the trolley that is mounted so as to integrally move the scraping mechanism of the deposited layer at the lower front portion. Provided respectively so that it can move in the longitudinal direction of the trolley, and with the center line in the longitudinal direction of the trolley aligned with the virtual reference line in the forward direction of the craft, the rear part of the trolley is stopped on the ground with one spat, Using this one spat as a fulcrum, by rotating the carriage to the outside where the spat is located with a swing within a predetermined angle range, the scraping mechanism scrapes the deposited layer in an arc around the one spat, Subsequently, by moving the base boat forward by a predetermined stroke with one spat as a fixed point, and rotating the base boat to the position of the virtual reference line with the one spat as a fulcrum at this advanced position, the previous scraping part Partly wraps Thus, the scraping mechanism scrapes the deposited layer in an arc shape centered on one spat, and then the scraping process on one side, and then, with one spat in the open position, the rear part of the carriage is moved with the other spat. The bottom of the ground and the other spat as a fulcrum are used to turn the trolley to the outside where the spat is located with a swing within a predetermined angular range. Next, the base ship is advanced by a predetermined stroke with the other spat as a fixed point, and the base ship is rotated to the position of the virtual reference line with the other spat as a fulcrum at this advanced position. The scraping mechanism uses a configuration in which the scraping process of the other side, which scrapes the deposited layer in an arc shape around the other spat, is alternately repeated so that a part of the scraping part wraps around. is there.
[0008]
The above scraping mechanism is incorporated so that the scraping blade rotates in a box whose bottom surface is open, and moves integrally in the turning direction of the carriage so as to scrape the deposited layer within the range of the opening width of the box. In addition, a mud suction pipe with the upper surface serving as a mud suction port is located at the axis of the scraping blade, and the upper half of the box is filled with pressurized air, thereby separating air and water from the scraped mud. The solid matter can be efficiently sucked into the suction pipe by performing the above and returning the water.
[0009]
This scraping mechanism is attached to the tip of an arm attached so as to be able to undulate in the front part of the trolley, and the vertical position can respond to changes in water depth by operating the winch.
[0010]
In addition, a horizontal swinging arm pivoted on both sides of the rear of the carriage is swung back and forth with a cylinder, and the spat is held at the tip of the swinging arm so that the vertical position can be adjusted and rotated. However, by stopping any one of the spats on the ground, the fulcrum at the time of turning of the trolley can be selected either left or right.
[0011]
The above-mentioned rotation of the trolley is made by placing piles in the front of the trolley at positions apart on both sides, and the wires pulled out from the two winches provided on both sides of the trolley via the pulley. By connecting to the corresponding piles on the corresponding side and alternately winding the wires of the winches on both sides, the trolley is rotated with the spat as a fulcrum.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
1 (A) to 1 (C) show a dredge apparatus used in the dredge method of the present invention, and a scraping mechanism for a deposited layer A at the tip of an arm 2 attached to the front portion of a carriage 1 so that it can be raised and lowered. 3 is mounted so as to swing left and right integrally with the base boat 1, and the spats 4 and 5 for stopping the rear portion of the base boat 1 to the bottom are mounted on the left and right sides at the rear portion of the base boat 1. And a winch 6 for raising and lowering the arm 2 and two winches 7 and 8 provided on both sides for swinging the carriage 1 left and right. In this structure, a mud tank 9 or the like for storing the mud soil scraped up by the scraping mechanism 3 is installed.
[0014]
As shown in FIG. 2, the scraping mechanism 3 includes a box 10 having a substantially semi-cylindrical shape with an open bottom surface, a scraping blade 11 incorporated so as to rotate in the box 10, and a shaft of the scraping blade 11. A mud pipe 13 penetrating along the heart, having an upper surface opened as a mud opening 12 and containing a screw 13a therein, a sand pump 14 connected to one end of the mud pipe 13, and the box A pair of opening / closing lids 15 and 16 attached to both sides of the opening 10 and cylinders 17 and 18 provided between the outer surface of the box 10 and the opening / closing lids 15 and 16 for separately opening and closing the opening / closing lids 15 and 16. Although not shown, it is formed by a motor or the like attached to the box 10 for rotating the scraping blade 11 or the screw 13a.
[0015]
The scraping blade 11 is bent into a forked shape between the two end plates 19 in the shape of a disc that fits in the box 10 and arcs toward the opposite side of the outer end to form a scraping portion 20. The long blade plate 21 and the short blade plate 22 are formed so as to be arranged radially at regular intervals in the circumferential direction.
[0016]
The arrangement of the long blade plate 21 and the short blade plate 22 of the scraping blade 11 is such that the end portion of the scraping portion 20 coincides with the outer periphery of the end plate 19, and the inner end of the long blade plate 21 and the mud suction pipe 13. A narrow gap is formed between the outer surface of the long blade plate 21 and a wide gap is formed between the inner end of the short blade plate 22 and the outer surface of the mud pipe 13, and the long blade plate 21 adjacent in the circumferential direction. Between the scraping portions 20 and 20 of the short blade plate 22 and the scraping portions 20 and 20 are arcuate scooping surfaces facing each other, so that the deposited layer can be formed by rotating the scraping blade 11 in any direction. Can be scraped under the same conditions. Therefore, the scraping mechanism 3 can scrape the deposited layer even if it is moved in either the left or right direction with respect to the width direction of the opening.
[0017]
In addition, the opening / closing lids 15 and 16 on both sides open and close the opening / closing lid 15 or 16 located on the forward side of the scraping blade 11 and the opening / closing lid 15 or 16 located on the rear side as the closed position. By closing approximately half, the scraping blade 11 scrapes the deposit A at the exposed portion between the forward side edge of the opening 10a and the rear opening / closing lid 15 or 16.
[0018]
The upper half of the box 10 is filled with pressurized air B from an air supply source such as a compressor provided on the carriage 1, and the mud removed with the scraping blades 11 together with water. Gas-water separation is performed by pressurization, water is returned to the lower half through a wide gap between the short vane plate 22 and the mud pipe 13, and solid matter is supplied into the mud pipe 13 from the mud inlet 12. By returning the water to the original state, the solid matter can be efficiently sucked into the mud suction pipe 13 and is effective for the post-treatment of the mud.
[0019]
On the left and right sides of the rear part of the carriage 1, horizontal swing arms 23, 24 pivoted on the carriage 1 are provided so as to swing back and forth with cylinders 25, 26. At the tip, the spats 4 and 5 are held so that the vertical position adjustment and rotation are possible, and either one of the spats 4 or 5 is stopped on the ground, so that the fulcrum at the time of swinging the trolley 1 is either left or right You can choose.
[0020]
The dredge apparatus used in the practice of the present invention has the above-described configuration. Next, a dredge method using the dredge apparatus will be described.
[0021]
3 to FIG. 6 show the steps of the scissor method using the scissor device, and FIG. 7 shows the state of the scissor range in the middle of the scissors.
[0022]
The basic steps of the dredging method according to the present invention are to alternately add the left and right swing and forward movement on the starboard side of the carriage 1 and the addition of the left and right swing and forward movement on the port side of the carriage 1. As a result, the image is linearly wrinkled with a predetermined width.
[0023]
First, FIG. 3 (A) shows the arrangement of the dredger device at the start of work, and sets the forward direction of the carriage 1 positioned in the dredging work range, and this forward direction is indicated by a one-dot chain line in FIG. 3 (A). Assuming that the virtual reference line a is shown, the center line b in the front-rear direction of the trolley is aligned with the virtual reference line a, and as shown in FIG. Piles 27 and 28 are placed at positions separated from each other, and wires 29 and 30 drawn from two winches 7 and 8 provided on both sides of the carriage 1 are respectively connected to the corresponding piles 27 via pulleys. , 28. At this time, the swing arms 23 and 24 on both sides of the rear portion of the carriage 1 are set in a phase where both of them are brought close to the carriage 1 by the contraction of the cylinders 25 and 26.
[0024]
In this state, the scraping mechanism 3 is positioned underwater. The scraping mechanism 3 is oriented so that the axial direction is along the front-rear direction of the carriage 1, and as shown in FIG. 2, the opening / closing lid 16 located on the forward side is opened, and the opening / closing lid 15 located on the rear side. Is closed and the rear half of the opening of the box 10 is closed, and pressurized air is supplied to the upper half of the box 10.
[0025]
Next, the starboard-side spat 4 in FIG. 3 (B) is lowered and stopped on the ground, the port-side spat 5 is separated from the ground, the scraping mechanism 3 is activated, and the scraping blade 11 is As shown by the arrows in FIG. 2, the starboard winch 7 is activated in a state where it is rotated so as to scrape the deposited layer A, and the wire 29 is wound up so that the starboard spat 4 serves as a fulcrum. The ship 1 is swung to the starboard side where the spat 4 is located with a swing width within a predetermined angle range.
[0026]
As shown in FIG. 3B, the scraping mechanism 3 scrapes the deposited layer A in an arc shape centering on the starboard side spat 4 within the length range of the opening 10a. When the swing angle reaches the set angle, the starboard winch 7 is stopped. The width of the arcuate scraping portion A1 is the length of the opening 10a of the box 10, and is arcuate with the spat 4 on the starboard side as the center.
[0027]
The scraping mechanism 3 lifts up the mud of the deposited layer A scraped with water by the rotating scraping blade 11, but since pressurized air is supplied to the upper half of the box 10, Moisture in the pressurized mud flows out to the lower half through the gap between the short blade 22 and the mud pipe 13, and the solid matter left by the air-water separation is lifted to the mud inlet 12 of the mud pipe 13. The solid material is dropped and supplied, and is stored in the mud tank 9 by feeding of the screw 13a and suction of the sand pump 14.
[0028]
Subsequently, as shown in FIG. 4C, when the starboard side cylinder 25 is extended, the trolley 1 that is inclined with respect to the virtual reference line a is inclined with the starboard side spat 4 as a fixed point. Move forward by a predetermined stroke. At this time, the forward stroke is set so that a part of the opening 10a of the box 10 wraps to the arcuate scraping portion A1.
[0029]
4C, the port side winch 8 is activated and the wire 30 is wound up, so that the carriage 1 is moved forward and backward to the virtual reference line a side with the starboard side spat 4 as a fulcrum. Swing to the left until b matches. At this time, the scraping mechanism 3 reverses the opening and closing positions of the front and rear opening / closing lids 15 and 16 and rotates the scraping blade 11 in the reverse direction.
[0030]
As shown in FIG. 4D, the scraping mechanism 3 swings with the starboard-side spat 4 as a fulcrum by the turn of the carriage 1 to the port side, and the arc-shaped scraping portion A2 is moved forward. The deposited layer A is scraped off so as to wrap around the collecting portion A1.
[0031]
Thus, on the starboard side, when reciprocating the right swing and the left swing on the carriage 1, the deposit A can be scraped off by both reciprocating swings by adding a forward movement.
[0032]
Next, as shown in FIG. 5E, in the state where the longitudinal axis b of the carriage 1 coincides with the virtual reference line a, the starboard side spat 4 is pulled up to the open position so that the carriage 1 is moved to the carriage 1 side. Next, the rear part of the carriage 1 is stopped on the ground with the spat 5 on the port side, the winch 8 on the port side is activated, and the wire 30 is wound up. 1 is swung to the port side where the spat 5 is located with a swing width in a predetermined angle range.
[0033]
As shown in FIG. 5 (F), the scraping mechanism 3 scrapes the deposited layer A into an arc shape centering on the port side spat 5 within the length of the opening to form an arc-shaped scraping portion B1. When the swing angle of the left side of the carriage 1 reaches the set angle, the winch 8 on the port side is stopped.
[0034]
Subsequently, as shown in FIG. 6G, when the port side cylinder 26 is extended, the trolley 1 inclined with respect to the virtual reference line a is inclined in the direction of inclination with the port side spat 5 as a fixed point. It moves forward by a predetermined stroke. The forward stroke at this time is set so that a part of the opening of the box 10 wraps in the arcuate scraping portion B1.
[0035]
From the state of FIG. 6G, the starboard winch 7 is activated and the wire 29 is wound up, so that the carrier 1 is moved back and forth on the virtual reference line a side with the port 5 spat 5 as a fulcrum. Swing until b matches. At this time, the scraping mechanism 3 reverses the opening and closing positions of the front and rear opening / closing lids 15 and 16 and rotates the scraping blade 11 in the reverse direction.
[0036]
As the carriage 1 swings to the starboard side, the scraping mechanism 3 rotates with the port side spat 5 as a fulcrum, and the arcuate scraping part B2 is deposited so as to wrap on the arcuate scraping part B1. Layer A will be scraped off.
[0037]
FIG. 6 (H) shows a state in which the longitudinal axis b of the carriage 1 coincides with the virtual reference line side a, and so far, the arcuate scraping portion A1 and starboard side on the starboard side with the virtual reference line a as a boundary. A2, arc-shaped scraping parts B1 and B2 are continuously applied on the port side. As shown in FIG. 3 (A), the starboard side spat 4 is lowered and stopped on the ground. The spat 5 is separated from the ground, and thereafter, as shown in FIGS. 3 to 6, the same operation as described above and the forward change of the stakes 27 and 28 on both sides are repeatedly performed. As such, the advancing trolley 1 can drown the deposited layer A with the total swing width of the left and right.
[0038]
【The invention's effect】
As described above, according to the present invention, the deposit layer scraping mechanism is attached to the front lower part so as to move integrally, and on both sides of the rear part, the spats for stopping the rear part on the ground can be moved in the front-rear direction. Using the provided trolley, the sedimentary layer was trapped while alternately applying the reciprocating swing and forward movement on the right side and the reciprocating swing and forward movement on the left side. By lapping part of the scraping, it is possible to dredge the deposited layer without leaving any scraping, and the dredging of the seabed, lake bottom, and riverbed can be reliably and efficiently performed.
[0039]
In addition, the swing width of each trolley is reduced by alternately performing the reciprocating swing and forward movement on the right side of the trolley and the reciprocating swing and forward movement on the left side with a spat located on each side as a fulcrum. In addition, the subsequent scraping portion can be reliably wrapped with respect to the previous scraping portion, and the wrinkle can be made without leaving any scraping.
[Brief description of the drawings]
1A is a plan view of a scissor device, FIG. 1B is a front view of the scissor device, FIG. 1C is a side view of the scissors FIG. 2 is a longitudinal front view of a scraping mechanism, and FIG. Fig. 4B is a plan view showing the initial state of the trolley in the method process. Fig. 4B is a plan view of the trolley swinging to the starboard side. Fig. 4C is a plan view of the trolley swinging to the starboard side. (D) is a plan view of the trolley swinging to the port side from the above. [FIG. 5] (E) is a plan view before the trolley swings to the port side. (F) is a plan view of the trolley from the above. Plan view swinging to the port side [Fig. 6] (G) is a plan view of the trolley swinging to the port side and moving forward. (H) is a plan view of the trolley swinging to the starboard side from the same. [Fig. Plan view showing the state of wrinkles by the device [Explanation of symbols]
1 Tank 2 Arm 3 Scraping mechanism 4, 5 Spat 6, 7, 8 Winch 9 Mud tank 10 Box 11 Scraping blade 12 Mud inlet 13 Mud pipe 14 Sand pump 15, 16 Open / close lid 17, 18 Cylinder 19 End plate 20 Scraping portion 21 Long blade 22 Short blade 23, 24 Swing arm 25, 26 Cylinder 27, 28 Pile 29, 30 Wire

Claims (1)

A spat for stopping the rear part of the trolley on the bottom is provided on both sides of the rear part of the trolley, which is mounted to move the scraping mechanism of the sedimentary layer in the lower front part.
With the center line in the longitudinal direction of the carriage aligned with the virtual reference line in the forward direction of the carriage, the back of the carriage is stopped on the ground with one spat, and the spat is attached to the spat with this one spat as a fulcrum. By rotating it to the outside with a swing within a predetermined angular range, the scraping mechanism scrapes the deposited layer into an arc shape centered on one spat, and then the base ship is fixed with one spat as a fixed point. By moving forward by the stroke and rotating the carriage to the position of the virtual reference line with one spat as a fulcrum at this advanced position, the scraping mechanism can Scraping the deposited layer in an arc shape centered on one spat;
Next, with one spat in the open position, the rear part of the trolley is stopped on the ground with the other spat, and the stern is rotated to the outside where the spat is located with the other spat as a fulcrum within a predetermined angular range. The scraping mechanism scrapes the deposited layer in an arc with the other spat as the center, and then advances the base ship by a predetermined stroke with the other spat as a fixed point. By turning the carriage to the position of the virtual reference line with the fulcrum as the fulcrum, the scraping mechanism scrapes the deposited layer in an arc around the other spat so that a part of it wraps around the previous scraping part. A scissor method characterized by alternately and repeatedly performing the other-side scraping step.

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