JP5698966B2 - Pollution prevention device and method for preventing pollution - Google Patents

Description

  The present invention relates to a pollution prevention device and a pollution prevention method for dredging work, and more particularly, to a pollution prevention device and a pollution prevention method for dredging work interposed between a pollution prevention frame installed in a water area and an earth ship. Is.

  As shown in FIG. 15, the dredging work is performed by anchoring a pollution prevention frame 2 surrounding the dredging area in a rectangular shape with a rope 3 or the like in front of a dredger 1 such as a grab dredger or a backhoe dredger. The clay ship 4 is anchored by a rope 5 or the like on the side of the ship, and the clay ship 4 is arranged side by side with the dredger 1 and the pollution prevention frame 2.

  Then, for example, the bottom of the pollution control frame 2 is excavated by the grab bucket 7 of the hoist 6 installed in the dredger 1, the grab bucket 7 holding the excavated earth and sand is pulled up to the surface of the water, and the hoist The boom 8 of No. 6 is turned to move the grab bucket 7 to the earth transport ship 4, and then the grab bucket 7 is opened to load the excavated earth and sand into the earth transport ship 4.

  Further, during the movement of the grab bucket 7, earth and sand and turbid water spill out from the gap between the grab buckets 7, and fall into the gap between the pollution prevention frame 2 and the earth transport ship 4 to cause contamination outside the pollution prevention frame. In order to prevent the occurrence, a landslide prevention plate 9 having a length of, for example, 2 m is provided on the edge 4a on the shore side of the ship 4 so as to protrude to the pollution prevention frame 2.

  However, since the hull of the earth transport ship 4 is lowered with the loading of excavated earth and sand, a certain margin length is secured in advance on a rope that fixes the dredger 1 and the earth ship 4. Since the rope has a slack allowance, the distance between the pollution prevention frame 2 and the ship 4 is increased to, for example, about 4 m when the ship 4 is shaken by the influence of wind, tide level, etc. May end up. For this reason, even if the earth and sand fall prevention plate 9 is installed, the earth and sand and turbid water from the grab bucket 7 fall into the gap between the pollution prevention frame 2 and the earth transport ship 4, and the outside of the pollution prevention frame. There was a drawback that pollution occurred.

  The present invention eliminates the above-mentioned drawbacks.

  The pollution prevention device for dredging work of the present invention is inserted between a clay ship and a pollution prevention frame, the floating ship side floating body arranged on the clay ship side, and the pollution arranged on the pollution prevention frame side. A prevention frame side floating body, a biasing means for constantly biasing the floating ship side floating body and the pollution prevention frame side floating body in directions away from each other, one end fixed to the floating ship side floating body, and the other end of the contamination The anti-floating body and the anti-contamination frame, and then suspended in the anti-contamination frame to cover the gap between the soil ship and the anti-contamination frame. Features.

  Further, the urging means is an extension member provided between the floating ship side floating body and the pollution prevention frame side floating body.

  Further, the urging means is provided on any one of the arm member for tiltably connecting the floating ship side floating body and the pollution prevention frame side floating body, and the soil transportation ship side floating body and the pollution prevention frame side floating body. And an urging member that controls the tilting of the arm member.

  Further, the pollution prevention method for dredging work includes a floating ship side floating body arranged on the side of the clay ship, which is inserted between the clay ship and the pollution prevention frame, and the pollution which is arranged on the side of the pollution prevention frame. The prevention frame side floating body is always urged away from each other by the urging means, one end is fixed to the urging device, and the other end is passed over the pollution prevention frame side floating body and the pollution prevention frame. A gap between the earth transport ship and the pollution prevention frame is covered with a pollution prevention sheet that hangs down in the pollution prevention frame.

  According to the present invention, even when earth and sand and muddy water from the grab bucket of a dredger falls between the earth ship and the pollution prevention frame, it falls on the pollution prevention sheet of the pollution prevention device and from there the pollution prevention from there Since it returns to the inside of the frame, there is a great advantage that no pollution occurs outside the pollution prevention frame.

It is a front view of 1st Example of the pollution prevention apparatus for dredging work of this invention. It is a top view of 1st Example of the pollution prevention apparatus for dredging work of this invention. It is a side view of 1st Example of the pollution prevention apparatus for dredging work of this invention. It is a front view of 1st Example of the pollution prevention apparatus for dredging work of this invention. It is a top view of 1st Example of the pollution prevention apparatus for dredging work of this invention. It is the top view which abbreviate | omitted the pollution prevention sheet | seat of 1st Example of the pollution prevention apparatus for dredging work of this invention. It is a front view of the other Example of 1st Example of the pollution control apparatus for dredging work of this invention. It is a top view of other Example of the 1st Example of the pollution prevention apparatus for dredging work of this invention. It is a side view of other Example of the 1st Example of the pollution control apparatus for dredging work of this invention. It is a front view of other Example of the 1st Example of the pollution control apparatus for dredging work of this invention. It is a top view of other Example of the 1st Example of the pollution prevention apparatus for dredging work of this invention. It is a top view of 2nd Example of the pollution prevention apparatus for dredging work of this invention. It is a front view of 2nd Example of the pollution prevention apparatus for dredging work of this invention. It is the top view which abbreviate | omitted the pollution prevention sheet | seat of 2nd Example of the pollution prevention apparatus for dredging work of this invention. It is an arrangement plan of a dredger, a pollution prevention frame, and an earth ship.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 3 show a pollution prevention device for dredging work according to the first embodiment of the present invention, and 10 is interposed between the dredging side of the soil carrier 4 and the floating body 2 a of the pollution prevention frame 2. The rod-shaped soil carrier side floating body 11 arranged along the side of the soil ship 4 is interposed between the side of the soil ship 4 and the body 2a of the pollution prevention frame 2, and the pollution. A rod-shaped anti-pollution frame side floating body arranged along the floating body 2a of the prevention frame 2, 12 is an intermediate floating body arranged between the soil carrier side floating body 10 and the anti-contamination frame side floating body 11, It is an urging means that urges the floating ship side floating body 10 and the anti-pollution frame side floating body 11 in a direction in which they are always separated from each other.

  Reference numeral 14 denotes one end fixed to the floating ship-side floating body 10 and the other end over the floating body 2a of the intermediate floating body 12, the pollution-preventing frame-side floating body 11 and the pollution-preventing frame 2, and then the pollution-preventing frame. Reference numeral 15 denotes a rectangular anti-pollution sheet 15 that hangs down in the water in 2, such as a pipe or chain fixed to the other end of the anti-pollution sheet 14. Note that the width of the pollution prevention sheet 14 is preferably the same as the length of one side of the floating body 2a of the pollution prevention frame 2, but the width of the lifting machine 6 of the dredger 1 may be shorter than the length of one side of the floating body 2a. Any length that can sufficiently cover the passage range of the grab bucket 7 may be used.

  Further, 16 is provided so as to protrude from both ends of the upper surface of the intermediate floating body 12 and the anti-pollution frame side floating body 11, and has a bent portion 16a bent in a direction facing each other at the upper portion thereof. This is a guide for preventing deviation.

  Further, the urging means 13 is constituted by an extension member 17 such as a coil spring, a sponge-like member or an air spring, which is fixed between the adjacent floating bodies.

  Moreover, each said floating body is comprised by covering the outer periphery of the steel pipe of diameter 700mm with a floater, for example.

  4 to 6 show the pollution prevention device for dredging work of the present invention before being inserted between the earth ship 4 and the floating body 2a of the pollution prevention frame 2. The natural length L is configured to be longer than the maximum distance at which the space between the clay ship 4 and the floating body 2a of the pollution prevention frame 2 opens.

  Therefore, by inserting this pollution prevention device between the clay ship 4 and the floating body 2a of the pollution prevention frame 2, the floating ship side floating body 10 and the pollution prevention are caused by the urging force of the extension member 17. The frame-side floating body 11 is always separated from each other, and the clay ship 4 and the floating body 2a of the anti-pollution frame 2 are pressed respectively, and the clay ship-side floating body 10 is in contact with the clay ship 4. In addition, the pollution prevention frame side floating body 11 is located at a position in contact with the floating body 2a of the pollution prevention frame 2.

  Further, as shown in FIG. 4, when the floating shapes of the floating ship side floating body 10, the intermediate floating body 12, and the pollution prevention side floating body 11 are made different from each other, and the floating bodies are floated in water, The projecting height from the floating ship side floating body 10, the intermediate floating body 12, the pollution prevention side floating body 11, and the floating body 2 a of the pollution prevention frame 2 are formed so as to decrease sequentially. Thereby, the said pollution prevention sheet 14 laid on each said floating body will incline so that it may become low gradually as it goes to the floating body 2a of the said pollution prevention frame 2 from the said clay ship.

  Since the pollution control device for dredging work of the present invention is configured as described above, the pollution control device in the natural length state shown in FIG. 4 and FIG. 5 is compressed, and as shown in FIG. 1 and FIG. The other side of the pollution prevention sheet 14 is inserted between the anchor side of the ship 4 and the floating body 2a of the pollution prevention frame 2, and the other end of the pollution prevention sheet 14 is the intermediate floating body 12, the pollution prevention frame side floating body 11, and the floating body 2a of the pollution prevention frame 2. After exceeding the top, it is suspended in the water in the pollution prevention frame 2.

  Thereby, as mentioned above, the said floating ship side floating body 10 is located in the place which touches the said clay ship 4, and the said pollution prevention frame side floating body 11 is located in the place which touches the said pollution prevention frame 2. Become. The other end of the pollution prevention sheet 14 is pulled downward by the weight of the suspension 15 of the pollution prevention sheet 14, and the pollution waterproof sheet 14 is moved to the intermediate floating body 12, the pollution prevention frame side floating body 11, and the pollution. The anti-contamination sheet 14 is laid in a tensioned state on the floating body 2a of the prevention frame 2, and covers the gap between the soil carrier 4 and the floating body 2a of the anti-contamination frame 2.

  And even if earth and sand and muddy water from the grab bucket 7 fall between the earth transport ship 4 and the floating body 2a of the pollution prevention frame 2 during the dredging work, the earth and sand and muddy water remain on the pollution prevention sheet 14. From there, it returns to the inside of the pollution prevention frame due to the inclination of the pollution prevention sheet 14, and no pollution occurs outside the pollution prevention frame.

  According to the present invention, even if the distance between the soil carrier 4 and the pollution prevention frame 2 changes due to the influence of wind, tide level, etc., the pollution prevention sheet 14 is always attached to the soil carrier 4 and the pollution prevention frame. Since the gap between the second floating body 2a and the floating body 2a is covered, there is a great advantage that the earth and sand and turbid water do not flow out of the pollution prevention frame and no pollution occurs.

  In addition, the cross-sectional shape of each floating body may be a rectangle as shown in FIG.

  Further, as shown in FIGS. 8 and 9, earth and sand fall prevention protrusions 18 formed from one end to the other end of the pollution prevention sheet 14 are provided on both sides of the upper surface of the pollution prevention sheet 14, respectively. You may make it prevent the earth and sand and muddy water which fell on the prevention sheet | seat 14 from falling from the side surface of the pollution prevention sheet | seat 14. FIG.

  Further, there may be two or more intermediate floating bodies 12. Further, the intermediate floating body 12 may be omitted.

  Moreover, instead of making the cross-sectional shapes of the floating ship side floating body 10, the intermediate floating body 12, and the pollution prevention side floating body 11 different from each other, as shown in FIGS. 10 and 11, the floating ship side floating body 10, the intermediate floating body 12. The cross-sectional shape of the pollution prevention floating body 11 is made the same, and sheet support members 19a, 19b, and 19c are projected from the upper surface of the soil carrier side floating body 10, the intermediate floating body 12, and the pollution prevention floating body 11, respectively. To do. Then, the sheet support member 19 a provided on the floating ship side floating body 10, the sheet support member 19 b provided on the intermediate floating body 12, and the sheet support member 19 c provided on the pollution prevention side floating body 11 are directed to the pollution prevention frame 2. Accordingly, the pollution prevention sheet 14 stretched on each floating body may be inclined so as to be sequentially lowered.

  In this case, the guide 16 is provided on the sheet support members 19b and 19c instead of being provided on the floating bodies 11 and 12, respectively.

  12 and 13 show a second embodiment of the pollution control apparatus for dredging work according to the present invention. In this second embodiment, the urging means 13 in the first embodiment is replaced with the extension member 17. In the first embodiment, the biasing means 13 is omitted, the intermediate floating body 12 in the first embodiment is omitted, the first mounting bracket 20 is fixed to the side surface of the floating ship-side floating body 10, and the pollution prevention is performed. A second mounting bracket 21 is fixed to the side surface of the frame-side floating body 11, and an arm member 24 is provided to connect the first mounting bracket 20 and the second mounting bracket 21 so as to be tiltable at pivot portions 22 and 23, respectively. . Further, a biasing member 25 such as a coil spring or a leaf spring for controlling the arm member 24 to tilt in a direction perpendicular to the pollution prevention frame floating body 11 is provided.

  FIG. 14 shows a pollution prevention device for dredging work according to the second embodiment of the present invention before being inserted between the earth ship 4 and the pollution prevention frame 2 (the pollution prevention sheet is omitted in FIG. 14). The anti-contamination device when the arm member 24 is tilted with respect to the anti-contamination frame-side floating body 11 until the arm member 24 becomes vertical, and the gap between the earth-moving ship-side floating body 10 and the anti-contamination frame-floating body 11 is maximized. The length M is configured to be longer than the maximum distance at which the space between the clay ship 4 and the floating body 2a of the pollution prevention frame 2 opens.

  Therefore, as in the first embodiment, by inserting the pollution prevention device between the earth ship 4 and the floating body 2a of the pollution prevention frame 2, the biasing force of the biasing member 25 The above-mentioned floating ship side floating body 10 and the above-mentioned pollution prevention frame side floating body 11 are always separated from each other, and the above-mentioned floating ship 4 and the floating body 2a of the above-mentioned pollution prevention frame 2 are respectively pressed in the same manner as in the first embodiment. Thus, the floating ship-side floating body 10 is located at a position in contact with the floating ship 4, and the pollution prevention frame-side floating body 11 is located at a place in contact with the floating body 2 a of the pollution prevention frame 2. .

  Reference numeral 26 indicates that the arm member 24 inclined with respect to the pollution prevention frame-side floating body 11 becomes vertical due to the urging force of the urging member 25 and further tilts beyond the vertical direction therefrom. This is a tilt regulating member. The braking restriction member 26 may be omitted.

  Since the pollution prevention device for dredging work in the second embodiment of the present invention is configured as described above, the arm member 24 is set perpendicular to the pollution prevention frame side floating body 11 as shown in FIG. From a certain state, as shown in FIG. 12, the biasing member 25 is tilted to compress the biasing member 25, and is inserted between the anchor side of the clay ship 4 and the floating body 2 a of the pollution prevention frame 2, and the other end of the pollution prevention sheet 14. Is suspended in the water in the pollution prevention frame 2 after exceeding the pollution prevention frame side floating body 11 and the floating body 2a of the pollution prevention frame 2.

  Thereby, as mentioned above, the said floating ship side floating body 10 is located in the place which touches the said clay ship 4, and the said pollution prevention frame side floating body 11 is located in the place which touches the said pollution prevention frame 2. Become. The other end of the pollution prevention sheet 14 is pulled downward by the weight of the heavy suspension 15 of the pollution prevention sheet 14, and the pollution waterproof sheet 14 is tensioned on the pollution prevention frame side floating body 11 and the floating body 2a of the pollution prevention frame. The pollution prevention sheet 14 covers the gap between the soil carrier 4 and the floating body 2 a of the pollution prevention frame 2.

  And even if the earth and sand and the muddy water from the grab bucket 7 fall between the floating ship 4 and the floating body 2a of the pollution prevention frame 2 during the dredging work, the earth and sand and the muddy water will remain on the pollution prevention sheet 14. From there, it returns to the inside of the pollution prevention frame due to the inclination of the pollution prevention sheet 14, and the pollution is not generated outside the pollution prevention frame.

  Also in the second embodiment of the present invention, as in the first embodiment, even if the distance between the soil carrier 4 and the pollution prevention frame 2 changes due to the influence of wind, tide level, etc., the pollution prevention sheet 14 is changed. Always covers the gap between the soil carrier 4 and the floating body 2a of the pollution prevention frame 2, so that there is a great advantage that no dirt or turbid water flows out of the pollution prevention frame and no pollution occurs. .

DESCRIPTION OF SYMBOLS 1 Dredger 2 Pollution prevention frame 2a Floating body 2b Pollution prevention film 3 Rope 4 Earth carrier 4a Edge 4b Protruding member 5 Rope 6 Lifting machine 7 Grab bucket 8 Boom 9 Sediment fall prevention plate 10 Earth carrier ship side floating body 11 Pollution prevention frame side floating body 12 Intermediate floating body 13 Energizing means 14 Pollution prevention sheet 15 Overhang 16 Guide 17 Extension member 18 Sediment fall prevention protrusion 19 Sheet support member 20 First attachment bracket 21 Second attachment bracket 22 Pivoting portion 23 Pivoting portion 24 Arm member 25 Biasing member 26 Tilt restricting member

Claims (4)

Inserted between the earth ship and the pollution prevention frame, the earth ship side floating body arranged on the earth ship side, and the pollution prevention frame side floating body arranged on the pollution prevention frame side,
A biasing means for constantly biasing the floating ship side floating body and the pollution prevention frame side floating body in directions away from each other;
One end is fixed to the floating ship side floating body, and the other end is passed over the pollution prevention side floating body and the pollution prevention frame, and then suspended in the pollution prevention frame, so that the clay ship and the pollution prevention frame are An anti-contamination device for dredging work, comprising an anti-contamination sheet configured to cover a gap between them.   2. The pollution control apparatus for dredging work according to claim 1, wherein the biasing means is an extension member provided between the floating ship side floating body and the pollution prevention frame side floating body.   The urging means is provided on either one of the arm member for connecting the floating ship-side floating body and the anti-contamination frame-side floating body in a tiltable manner, and the floating ship-side floating body and the anti-contamination frame-side floating body. An anti-contamination device for dredging work according to claim 1, further comprising an urging member that controls the tilting of the arm member. An urging means is inserted between the earth ship and the pollution prevention frame, and the earth ship side floating body arranged on the earth ship side and the pollution prevention frame side float arranged on the pollution prevention frame side are biased, Always urging away from each other,
By the pollution control sheet which fixes one end to the urging device and the other end passes over the pollution prevention frame side floating body and the pollution prevention frame and then hangs down in the pollution prevention frame, A pollution prevention method for dredging work, which covers a gap between the pollution prevention frame.

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