JP2007063959A - System and method dropping riprap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system and a method for dropping riprap and capable of efficiently constructing a riprap mound and shortening a construction period of time. <P>SOLUTION: The riprap dropping system 1 is provided with both a large-sized riprap dropping opening 10a capable of dropping riprap 31 to the bottom of the water and a tremie pipe 12 in which a small-size riprap dropping opening 12a smaller than the large-sized riprap dropping opening 10a is formed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rubble throwing system and a rubble throwing method for constructing a rubble mound as a foundation of a breakwater or a revetment on the bottom of a pit by dropping the rubble.

  Conventionally, when constructing a mound on the bottom of a water, a ship with rubble was operated or towed to a target position, and then the rubble was dropped from the surface of the water with a bucket and submerged on the bottom of the water.

  And especially when the water depth is deep, the rubble is scattered by the ocean current, etc., and it is difficult to sink the desired amount of rubble to the necessary place, and when sinking such rubble, There was a problem of causing ocean pollution.

  As an invention capable of preventing such scattering of rubble and swiftly laying rubble at a necessary place, there is one described in Patent Document 1. In Patent Document 1, “a chute for throwing stones or the like provided with a buoyancy adjusting means that can be submerged or floated on the water surface, and when used, the throwing port for the rubbish stones is open to the water surface. A chute characterized in that a cylindrical charging body connected to the charging port is laid down in a substantially vertical shape in water and can float in a horizontal state when towing or the like. Has been.

According to this, it is a throwing chute for rubble and the like provided with a buoyancy adjusting means that can be submerged or floated on the water surface. The cylindrical input body connected to the input port is submerged in a substantially vertical shape in the water, and can float in the horizontal direction during towing, etc. It is possible to quickly lay down stones, etc. at the necessary places while preventing the storm, etc. Also, when installing the mound, etc., the chutes are placed in a vertical shape in the water and thrown into the rubble. The chute can be levitated in the horizontal direction, so handling and moving the chute is very easy.In addition, the chute can be levitated in the horizontal direction, Shu from the bottom Since bets are not protruded bottom of water direction, not even chute obstruct a case of operating such a shallow water, are easily can be operated like. "Effect described.
Japanese Patent No. 2689271.

  However, in the invention described in Patent Document 1, a chute (tremy pipe) is pulled to the rubble dropping point on the surface of the water by a work ship, and the chutes (tremy pipe) are arranged vertically at the rubble dropping point. It is necessary to build a rubble mound by dropping a relatively small amount of rubble with a chute (Tremmy tube) from the initial stage of dropping the trash, and work efficiency is low and it takes time to build a rubble mound There was a fear. In particular, the larger the rubble mound to be constructed, the higher the risk.

  Therefore, in the present invention, compared to the case where a rubble mound is constructed using a chute (Tremmy tube) between the initial stage of dropping rubble and completion, the rubble mound is constructed efficiently and the construction period is shortened. An object is to provide a rubble dropping system and a rubble dropping method.

  In order to achieve such an object, the invention described in claim 1 is a large-sized rubble throwing opening formed in a floating body for throwing rubble and capable of dropping rubble to the bottom of the water, and a small rubble throwing smaller than the large rubble throwing opening. A rubble-throwing system including a tremy tube with an opening formed therein.

  The invention described in claim 2 is characterized in that, in addition to the configuration described in claim 1, the tremy tube is detachable from the large rubble throwing opening.

  According to a third aspect of the present invention, in addition to the configuration of the second aspect, a rail is disposed along the periphery of the large rubble throwing opening, and the tremy tube moves along the rail, thereby It is movable over a large rubble throwing opening.

  The invention according to claim 4 adds to the structure according to any one of claims 1 to 3, and the rubble dropped from the large rubble throwing opening and / or the small rubble throwing opening accumulates on the bottom of the water. A sound wave transmitting / receiving device for detecting a situation is provided.

  The invention according to claim 5 is a plurality of substantially mountain-like shapes formed in a floating body for throwing rubble and throwing the rubble from a large rubble throwing opening for dropping rubble to the bottom of the water, and adjacent to the water bottom by the rubble. The rubble is provided in the floating body for throwing rubble, and from the small rubble throwing opening smaller than the large rubble throwing opening to the valley between the mountain shape and the mountain shape of the adjacent depositing part. It is characterized in that it is a rubble dropping method that drops and fills the valley.

  In addition to the process of claim 5, the invention described in claim 6 is configured to drop the rubble from the large rubble throwing opening to form the pile-shaped pile, and to remove the rubble from the small rubble dropping opening. It is characterized by being dropped to fill the valley.

  According to the first aspect of the present invention, the rubble throwing system formed on the floating body for throwing rubble has a large rubble throwing opening capable of dropping rubble onto the water bottom, and a small rubble throwing opening smaller than the large rubble throwing opening. And a formed tremy tube. Therefore, it is possible to quickly build a foundation for a rubble mound by dropping a large amount of rubble to the bottom of the water from a large rubble drop opening, and dropping from a small rubble drop opening by providing a small rubble drop opening in this large rubble drop opening You can drop rubble while adjusting the amount. Therefore, one large rubble throwing opening can be used for both a large amount of rubble throwing and a small amount of rubble throwing, so that one can play a dual role. For this reason, it is possible to handle a large rubble throwing opening and a small rubble throwing opening without taking up space, and it is not necessary to enlarge the rubble dropping mechanism.

  According to the second aspect of the present invention, the tremy tube is detachable from the large rubble throwing opening. Therefore, in the initial stage of throwing rubble to the bottom of the water, it is possible to quickly deposit a large amount of rubble on the bottom of the rubble by dropping the rubble from the large rubble drop opening to the bottom without placing a tremmy pipe in the large rubble drop opening. In the finishing stage where rubble is dropped to the bottom of the water, a tremmy pipe is placed in the large rubble pit opening, and the rubble is thrown from the small rubble pit to the bottom to flatten the top surface of the rubble accumulated with high accuracy. be able to. Therefore, compared with the conventional case, the tremy tube can be used only when it is really necessary, and the tremy tube can be used effectively. Moreover, since the tremy tube is detachable, there is a degree of freedom in the installation position.

  According to invention of Claim 3, a rail is arrange | positioned along the circumference | surroundings of a large rubble throwing-down opening, and a tremy pipe can move on a large rubble throwing-down opening by moving along a rail. Therefore, even when there are only a few tremy tubes, the rubble can be thrown to the bottom of the water with a higher accuracy than or equal to the large number of tremmy tubes installed in the large rubble dropping opening.

  According to the fourth aspect of the present invention, the acoustic wave transmission / reception device is provided that detects a situation in which the rubble dropped from the large rubble throwing opening or the small rubble throwing opening accumulates on the bottom of the water. Therefore, the water depth from the sound source to the mound can be accurately detected by the sound wave transmitting / receiving device. Therefore, the height of the mound can be accurately grasped. Moreover, it is possible to accurately grasp the state of the deposit formed by dropping the rubble from the large rubble throwing opening and the valley between the mountain shape and the mountain shape of the deposit portion.

  According to the invention described in claim 5, a plurality of substantially mountain-shaped adjacent to the bottom of the water by dropping the rubble from the large rubble throwing opening formed on the floating body for dropping the rubble and dropping the rubble onto the bottom of the water. Forming a sedimentation section, provided in a floating body for throwing rubble, throwing rubble from a small rubble throwing opening that is smaller than a large rubble throwing opening, into a valley between adjacent hills To fill. Therefore, when forming a rubble mound, in order to form a plurality of piles, a large amount of rubble is thrown from the large rubble drop opening, and a small rubble is placed in the valley between the mountain and the hill of the pile. High-precision rubble can be dropped onto the bottom of the water while adjusting the amount from the opening. Therefore, the construction period can be greatly shortened as compared with the case where the rubble is dropped using the tremy pipe in all stages from the initial stage of the rubble throwing to the finishing stage as in the prior art.

  According to the sixth aspect of the present invention, the rubble is dropped from the large rubble throwing opening to form a mountain-shaped pile, and the rubble is dropped from the small rubble throwing opening to fill the valley. Therefore, a large amount of rubble can be dropped on the bottom of the water faster than before, and the upper surface of the rubble deposited on the bottom of the water can be flattened faster than before. Therefore, the construction period for completing the rubble mound can be further shortened.

Embodiment 1 of the Invention
Embodiment 1 of the present invention will be described below.

  1 to 9 show a first embodiment of the present invention.

  First, the configuration will be briefly described. As shown in FIG. 1, a rubble dropping platform ship 10 and a gut ship 30 which are “floating bodies for rubble dropping” are provided on the sea S. The rubble-throwing system 1 is a tremme pipe that is formed on a rubble-throwing platform 10 and has a large rubble-throwing opening 10a that can drop the rubble 31 to the bottom of the water, and a small rubble-throwing opening 12a that is smaller than the large-sized rubble throwing opening 10a. 12.

  The tremy pipe 12 in which the small rubble throwing opening 12a is formed is configured to be detachable from the large rubble throwing opening 10a of the rubble throwing base ship 10. In addition, the rubble throwing platform ship 10 is provided with a winch chamber 13, and a dredge (not shown) provided at the tip of the ship maneuvering wire 11 is lowered to the bottom of the water so that it can be placed at a predetermined position on the water surface. . Then, the ship maneuvering wire 11 is pulled by operating and pulling a winch operation table 13a (see FIGS. 2 and 3) in the winch chamber 13 provided at both ends of the rubble dropping table ship 10 to thereby pull the rubble dropping table ship 10. However, it can move on the surface of the water. In addition, a control chamber 14 is provided on the winch chamber 13 to manage the position of the rubble throwing platform 10 and the accumulation of the rubble 31.

  On the other hand, as shown in FIG. 1, a rubble 31 is loaded on the gut ship 30, and a crane 32 is provided. The rubble 31 can be moved by a clam shell 33 attached to the crane 32.

  Next, the configuration of the rubble throwing platform 10 will be described in more detail.

  As shown in FIG. 2A, the rubble throwing platform ship 10 is formed with two large rubble throwing openings 10a, and a winch chamber 13 having two winch operation tables 13a is provided at the center of the end portion. In the four corners, fair leaders 15 are provided, and an acoustic sounding device 16 is provided in the center. In FIG. 2A, there are two large rubble throwing openings 10a, but more than two may be used. Further, the size of the rubble 31 (see FIGS. 2B and 3B) may be about 10 to 50 cm in diameter, or more than that.

  As shown in FIG. 2 (a), the large rubble throwing openings 10a are formed in a rectangular shape in plan view and are formed adjacent to each other, and the size of each large rubble throwing opening 10a is, for example, rectangular. The length in the longitudinal direction is about 5 m to 10 m, and the width is about 3 m. However, the length and width are not limited to this size. Further, as the scale increases, it is particularly preferable to lengthen the length direction. If it does so, it is because the gut ship 30 can move along the length direction of the large rubble dropping opening 10a, and can drop the rubble 31 for a long distance.

  Moreover, as shown in FIG.2 (b), the large rubble throwing opening 10a is formed in a hopper type | mold by sectional view, and the inclined surface part 10b and the vertical surface part 10c are formed. As shown in FIG. 1, the rubble 31 loaded on the gut ship 30 is dropped from each large rubble throwing opening 10 a to the bottom of the water by a clam shell 33 attached to the crane 32. As shown in FIG. 2B, the thrown rubble 31 is deposited on the bottom of the water to form the deposited portions 50a and 50b.

  When the heights of the depositing portions 50a and 50b reach the desired height, the winch operation table 13a is driven, the ship maneuvering wire 11 is pulled through the fair leader 15, and the rubble dropping platform ship 10 is moved to another place. It can be moved and fixed (see FIG. 7). The rubble-throwing platform ship 10 can also raise and lower the dredging by a throwing ship, and can greatly move the rubble-throwing section.

  As shown in FIG. 3A, the tremy tube 12 is formed in a square shape in a plan view, and two tremy tubes 12 are inserted into one large rubble throwing opening 10a. Moreover, as shown in FIG.3 (b), it is hopper type | mold by sectional view so that it may be hooked on the rubble throwing opening 10a, and the inclined surface part 12b and the vertical surface part 12c are formed. Accordingly, the inclined surface portion 12b of the tremmy pipe 12 can be placed on the inclined surface portion 10b of the large rubble throwing opening 10. Since the vertical surface portion 12c of the tremy pipe 12 is formed longer than the vertical surface portion 10c of the rubble throwing platform 10, the rubble 31 is more reliably disposed at the desired position of the water bottom when dropped from the tremy pipe 12 to the water bottom. Be guided to. The tremy tube 12 may be circular or rectangular in the shape of the hole in the vertical surface portion 10c. In the circular shape, the diameter is about 2 to 3 m. It is also possible to lengthen the length by connecting another tremy tube to the lower end of the tremy tube 12. When the water depth is deep, the tremy pipe 12 can be added and extended, and the influence of the tide flowing when the rubble 31 falls can be reduced.

  As shown in FIG. 2 (b), the acoustic sounding device 16 detects the distance between the water surface and the bottom of the water by transmitting an ultrasonic wave toward the bottom of the water, receiving the ultrasonic wave reflected back from the bottom of the water, From the information, the accumulation status of the rubble 31 deposited on the bottom of the water can be monitored by the instrument in the control room 14. The acoustic depth measuring instrument 16 is preliminarily input with tide level fluctuation data, and measures the water depth from the rubble throwing platform 10 to the deposits 50a to 50e, valleys 53a to 53d and mound 52 described later. Thus, the height of the mound 52 is grasped (see FIG. 2B). By obtaining these data in real time, the amount of rubble 31 at each position can be accurately calculated.

  Further, as shown in FIG. 2 (b), a pollution prevention fence 17 is provided around the rubble dropping platform 10, and the rubble 31 dropped from the large rubble throwing opening 10a is washed away by the tide and the water quality. Prevents contamination.

  The tremme pipe 12 can be attached to and detached from the large rubble throwing opening 10a of the rubble throwing platform 10, and as shown in FIGS. 3 (a) and 3 (b), each large rubble throwing opening 10a includes Two tremy tubes 12 can be attached.

  Next, the construction procedure of the rubble mound 52 by the rubble throwing system 1 according to Embodiment 1 of the present invention will be described.

  The rubble mound 52 is constructed by first dropping the mound 52 close to the expected height of the mound 52 and then dropping the required amount of rubble 31 at a location where the drop amount is insufficient. The rubble mound 52 is constructed by dropping, and the top portion thereof is spread evenly.

  First, as shown in FIGS. 4 (a) and 4 (b), the rubble dropping platform 10 is towed to a desired position while measuring the position of the rubble mound 52 using GPS and accurately grasping the position. The rubble throwing platform 10 is guided to the place where rubble throwing is planned on the surface of the sea by maneuvering the maneuvering wire 11 by lowering the dredger by a throwing ship (not shown). The ship maneuvering wire 11 supported by the dredger is manipulated from the winch chamber 13 to freely position the rubble dropping platform ship 10.

  Next, the gut ship 30 loaded with the rubble 31 is brought into contact with the rubble dropping platform ship 10 as shown in FIGS. At this time, the gut ships 30 come together one by one for each large rubble throwing opening 10a.

  Each gut ship 30 calculates and calculates the amount of rubble thrown at a predetermined position from the data of GPS and the acoustic sounding instrument 16 equipped on the rubble throwing platform 10, and the amount of rubble dropped at that location is determined. . At this time, fluctuations in the tide level are input to the acoustic sounding instrument 16 so that it can cope with the drop time. The height of the seabed is measured in advance.

  In each gut ship 30, as shown in FIGS. 6A and 6B, the crane 32 grabs the rubble 31 by the clamshell 33 provided at the tip of the crane 32 and calculates the rubble 31 loaded. The rubble 31 is dropped from one or a plurality of large rubble throwing openings 10a one after another until the amount reaches, thereby forming the deposit 50a as shown in FIG. 6 (b). When the rubble 31 is dropped onto the seabed and after the drop, the formation state of the rubble mound 52 is confirmed by the acoustic sounding instrument 16 at a predetermined position.

  When the planned amount of rubble 31 is dropped and the formation of the deposit 50a is completed, the rubble dropping platform 10 uses the GPS to command the winch chamber 13 as shown in FIGS. 7 (a) and 7 (b). The marine vessel maneuvering wire 11 is pulled by and guided to the place where the next rubble 31 is scheduled to be dropped adjacent to the deposit 50a. Similarly, the rubble 31 is dropped to construct the depositing part 50b, and thereafter, the depositing parts 50c, 50d, and 50e are sequentially formed. The rubble 31 dropped from the large rubble dropping opening 10a becomes a hill-like shape, and a hill group in which the hills overlap is formed with the movement of the rubble dropping platform 10 (initial dropping step). At this time, the rubble 31 is dropped to ensure the planned width of the rubble mound 52.

  In addition, at the time of dropping of the rubble 31, the acoustic depth instrument 16 accurately grasps the heights of the deposited portions 50 a to 50 e to be deposited.

  After forming the deposited portions 50 a to 50 e over the entire planned site where the rubble mound 52 is formed, the tremy pipe 12 loaded on the gut ship 30 is operated by operating the crane 32 to finish the height of the rubble mound 52. Installed in the large rubble throwing opening 10a. Then, the rubble throwing platform 10 is moved by maneuvering by the winch chamber 13, and the rubble mound 52 is formed as a small mountain group with respect to the mountain portions 53a to 53d between the mountain shapes and the mountain shapes. As shown by 8 (a) and (b), the required amount of rubble 31 is accurately dropped from the tremy tube 12 to build the inter-deposition accumulation portions 51a to 51d. Then, as shown by a two-dot chain line in FIG. 8B, the rubble 31 is dropped with high accuracy so that an accurate and efficient rubble mound 52 is formed. At this time, the throwing amount of the rubble 31 at a predetermined position is calculated from the data of the GPS and the acoustic sounding instrument 16, and the calculated predetermined rubble amount is dropped from one or a plurality of tremy tubes 12. . Further, when the rubble 31 is thrown in, the position of the rubble dropping platform 10 is measured by GPS (not shown) so that the amount of the rubble 31 does not become excessive or insufficient, and the heights of the deposit portions 50a to 50d are increased by the acoustic sounding device 16. Check. Even after the rubble 31 is dropped, the formation status of the rubble mound 52 is confirmed by the GPS and the acoustic sounding instrument 16 at a predetermined position, and the dropping of the rubble 31 at the predetermined position is finished. Ultimately, as shown in FIGS. 9A and 9B, a rubble mound 52 is formed. As a result, the planned width can be secured and the rubble mound 52 having a uniform height can be constructed accurately and efficiently (finishing dropping step).

  According to such a rubble throwing system 1, the rubble throwing platform 10 has a plurality of large rubble throwing openings 10a capable of dropping the rubble 31 to the bottom of the water, and a small rubble throwing opening 12a smaller than the large rubble throwing opening 10a. And a plurality of formed tremy tubes 12. Therefore, a large amount of rubble 31 can be dropped from the large rubble throwing opening 10a to the bottom of the water to quickly construct the foundation of the rubble mound 52, and the small rubble throwing opening 12a is provided in the large rubble throwing opening 10a. The rubble 31 can be dropped while adjusting the drop amount from the rubble throw opening 12a. Therefore, one large rubble throwing opening 10a can be used for both a large amount of rubble 31 thrown and a small amount of rubble 31 thrown, so that it can play a role of two. For this reason, the large rubble throwing opening 10a and the small rubble throwing opening 12a can be handled without taking a place, and it is not necessary to enlarge the rubble throwing mechanism. Furthermore, compared to the conventional case where the rubble mound 52 is constructed using the tremy pipe 12 between the initial drop from the initial drop when the rubble 31 is dropped to the completion after the final drop, the rubble mound 52 is more efficient and accurate. Construction time can be shortened.

  Further, the tremy tube 12 is detachable from the large rubble throwing opening 10a. For this reason, in the initial stage of dropping the rubble 31 to the bottom of the water, the rubble 31 is dropped from the large rubble throwing opening 10a to the bottom of the water without disposing the tremy pipe 12 in the large rubble throwing opening 10a. At the finishing stage where the rubble 31 can be deposited on the bottom of the water, the tremy tube 12 is disposed in the large rubble throwing opening 10a, and the rubble 31 is dropped from the small rubble throwing opening 12a onto the bottom of the water. The upper surface of the rubble 31 deposited with accuracy can be flattened. Therefore, compared with the conventional case, the tremy tube 12 can be used only when it is really necessary, and the tremy tube 12 can be used effectively.

  Furthermore, the sound wave transmission / reception apparatus 16 which detects the condition where the rubble 31 dropped from the large rubble throwing opening 10a or the small rubble throwing opening 12a accumulates on the bottom of the water is provided. For this reason, the sound wave transmitting / receiving device 16 can accurately detect the water depth from the sound source to the accumulation parts 50a to 50e or the valleys 53a to 53d. Therefore, the height of the rubble mound 52 can be accurately grasped. Moreover, the state of the troughs 53a-53d between the pile shape 50a-50e formed by dropping the rubble 31 from the large rubble throwing opening 10a and the mountain shape of the deposit parts 50a-50e and a mountain shape is correctly grasped | ascertained. can do.

  In addition, the rubble 31 is dropped from the large rubble throwing opening 10a formed on the floating body 10 for throwing rubble to drop the rubble 31 to the bottom of the water, and the rubble 31 forms a plurality of substantially mountain-shaped piles adjacent to the bottom of the water. Then, a rubble 31 is dropped from a small rubble throwing opening 12a, which is provided in the rubble throwing floating body 10 and is smaller than the large rubble throwing opening 10a, into a valley between the mountain shape and the mountain shape of the adjacent deposited portion. To fill. Therefore, when forming the rubble mound 52, in order to form a plurality of deposited portions, a large amount of rubble is dropped from the large rubble throwing opening 10a, and in the valley portion between the mountain shape and the mountain shape of the deposited portion, It is possible to drop the rubble 31 with high precision onto the bottom of the water while adjusting the amount from the small rubble throwing opening 12a. Therefore, as compared with the conventional case where the rubble is dropped using the tremy pipe 12 in all stages from the initial stage of the rubble 31 dropping to the finishing stage, the construction period can be greatly shortened. it can.

The rubble throwing platform 10 includes a plurality of large rubble throwing openings 10a, and a plurality of detachable tremy pipes 12 are installed in the large rubble throwing openings 10a. Thus, the rubble mound 52 can be constructed accurately and efficiently. Since the rubble mound 52 having a uniform height can be constructed accurately and efficiently, there is little rework, the construction period can be shortened, and the construction cost can be reduced, thereby obtaining an economic effect. it can.
[Embodiment 2 of the Invention]

  The second embodiment of the present invention will be described below.

  FIG. 10 shows a second embodiment of the present invention. 10 (a) and 10 (b), the same members as those in the first embodiment of the present invention are denoted by the same reference numerals, and the following description is omitted.

  The rubble throwing system 100 according to the second embodiment of the present invention differs from the rubble throwing system 1 according to the first embodiment of the present invention according to the rubble throwing system 1 according to the first embodiment of the present invention. Although the tremy tube 12 is attached to each of the dropping openings 10a, in order to further shorten the construction period of the rubble mound 52, as shown in FIGS. The point is that the tremy pipe 12 is attached to only one of the large rubble throwing openings 10a. In the figure, there are two tremy tubes 12, but one may be used. Further, it is effective even if the number of the small tremy tubes 12 is two or more.

According to such a rubble throwing system 100, the rubble 31 is dropped from the large rubble throwing opening 10a to form the mountain-shaped deposit 50, while the rubble 31 is dropped from the small rubble throwing opening 12a to form the valleys 53a to 53d. Can be filled. Therefore, a large amount of rubble 31 can be dropped on the bottom of the water faster than before, and the upper surface of the rubble 31 deposited on the bottom of the water can be flattened faster than before. Therefore, the construction period for completing the rubble mound 52 can be further shortened.
Embodiment 3 of the Invention

  The third embodiment of the present invention will be described below.

  11 and 12 show a third embodiment of the present invention. 11 and 12, the same members as those in the first embodiment of the present invention are denoted by the same reference numerals, and the following description is omitted.

  The rubble throwing system according to Embodiment 3 of the present invention differs from the rubble throwing system 100 according to Embodiment 2 of the present invention as shown in FIGS. 11 and 12 in the large rubble throwing opening of the rubble dropping platform 10. 10a, the traveling rail 201 is disposed along the vicinity of 10a, and the traveling carriage 202 provided with the wheels 203 can be moved on the traveling rail 201 as shown in FIG. One or a plurality of tremy pipes 12 are placed on the traveling carriage 202 so that the small rubble throwing opening 12a formed in the tremy pipe 12 can be moved to a desired position on the large rubble throwing opening 10a. .

  That is, as shown in FIGS. 11 and 12, the rubble dropping platform ship 200 that is a “floating body for rubble throwing” has its large rubble throwing along two opposing sides in the large rubble throwing opening 10a formed in a square. A traveling rail 201 is disposed in the vicinity of the opening 10a. On the traveling rail 201, the tremy tube 12 is mounted on the traveling carriage 202, and the tremy tube 12 can be moved to a predetermined position. Unlike the first embodiment of the present invention, the tremmee pipe 12 placed on the large rubble throwing opening 10a via the traveling carriage 202 has a small rubble throwing opening 12a within the range of the large rubble throwing opening 10a. Minute movement is possible.

  The traveling carriage 202 is equipped with a drive motor (not shown) that drives the wheels 203. A drive motor (not shown) can be run or stopped by a local operation panel and a remote operation panel.

  According to such a rubble throwing system, the traveling rail 201 is disposed along the periphery of the large rubble throwing opening 10 a, and the tremmy pipe 12 moves along the traveling rail 201 to move the large rubble throwing opening 10 a over the large rubble throwing opening 10 a. It is movable. Therefore, even when there are only a few trememy pipes 12, the rubble 31 can be dropped to the bottom of the water with a higher accuracy than or equal to the large number of trememy pipes 12 installed in the large rubble throwing opening 10a.

  In the third embodiment of the present invention, the tremy tube 13 is attached to and detached from the traveling carriage 202. However, the present invention is not limited to the above embodiment. In other words, the tremy tube 12 can be fixed to the traveling carriage 202 and integrally attached to and detached from the traveling rail 201.

  In the first, second, and third embodiments of the present invention, two large rubble throwing openings 10 a are provided. Of course, there may be two or more depending on the scale of the rubble mound 52.

It is a perspective view which shows the structure of the rubble throwing-down system which concerns on Embodiment 1 of this invention. The rubble-throwing floating body according to the embodiment is shown, (a) is a plan view showing the configuration of the rubble-throwing floating body, and (b) is an explanatory diagram showing the state of rubble throwing by the rubble-throwing floating body. is there. The state which attached the tremy pipe to the floating body for rubble throwing concerning the embodiment is shown, (a) is a top view showing the composition of the floating body for rubble throwing attached with the tremy pipe, and (b) is treme It is explanatory drawing which shows the dropping condition of the rubble by the floating body for rubble dropping to which the pipe was attached. It is explanatory drawing which shows the construction procedure of the rubble mound which installs the floating body for rubble throwing which concerns on the same embodiment in a rubble dropping place, (a) is a top view, (b) is a side view. It is explanatory drawing which shows the construction procedure which touches a gut ship to the floating body for rubble throwing which concerns on the embodiment, (a) is a top view, (b) is a side view. It is explanatory drawing which shows the construction procedure which drops rubble from the large-sized rubble throwing opening of the floating body for rubble throwing which concerns on the embodiment, (a) is a top view, (b) is a side view. It is explanatory drawing which shows the condition which moves the floating body for rubble throwing concerning the embodiment on the sea surface, (a) is a top view, (b) is a side view. It is explanatory drawing which shows the condition which attaches a tremy pipe to the large-sized rubble throwing opening of the floating body for rubble throwing which concerns on the embodiment, and throws rubble on the bottom of the water, (a) is a top view, (b) FIG. It is explanatory drawing which shows the state which the rubble mound concerning the same embodiment was completed, (a) is a top view, (b) is a side view. The rubble dropping system which concerns on Embodiment 2 of this invention is shown, (a) is a top view, (b) is a side view. It is a top view which shows the rubble throwing-down system which concerns on Embodiment 3 of this invention. The rubble throwing-down system which concerns on the embodiment is shown, (a) is sectional drawing, (b) is an expanded sectional view of (a).

Explanation of symbols

1,100 Rubble throwing system
10,200 Rubble drop platform (floating body for rubble drop)
12 Tremy tube
16 Acoustic depth sounder
30 gut ship
31 Rubble
50a ~ 50e Deposition part
50a-1 to 50e-1 Deposits between deposits
53a-53d Tanibe
52 Rubble Mound
201 Running rail
202 traveling cart
203 wheels

Claims (6)

A large rubble throwing opening that is formed in the rubble throwing float and can drop rubble onto the bottom of the water,
A rubble throwing system comprising: a tremy pipe having a small rubble throwing opening formed smaller than the large rubble throwing opening.   The rubble dropping system according to claim 1, wherein the tremy pipe is detachable from the large rubble dropping opening.   The rail is disposed along the periphery of the large rubble throwing opening, and the tremy pipe is movable on the large rubble throwing opening by moving along the rail. Described rubble throwing system.   4. The apparatus according to claim 1, further comprising a sound wave transmission / reception device that detects a situation in which the rubble dropped from the large rubble throwing opening and / or the small rubble throwing opening accumulates on a water bottom. Described rubble throwing system. From the large rubble throwing opening formed in the floating body for rubble throwing and dropping the rubble to the bottom of the water, the rubble is dropped, and the rubble forms a plurality of substantially mountain-shaped piles adjacent to the bottom of the water,
From the small rubble throwing opening that is provided in the rubble throwing floating body and is smaller than the large rubble throwing opening, the rubble is dropped into the valley between the mountain shape and the mountain shape of the adjacent piled portion, and the valley portion is A rubble dropping method characterized by filling. 6. The valley is filled by dropping the rubble from the small rubble throwing opening while dropping the rubble from the large rubble throwing opening to form the pile-shaped pile. The rubble throwing method described in 1.

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