JP5689738B2 - Underwater structure contact protective material and underwater structure installation method - Google Patents

Description

  The present invention relates to an underwater structure contact protection material and an underwater structure installation method using the underwater structure contact protection material.

  When constructing a gravity-type quay or revetment, a caisson manufactured on land is towed to a target laying place by a ship, etc., poured into a hollow portion, and submerged using a crane or the like. When one caisson is installed, the next caisson is installed adjacent to it. If this caisson hits the installed caisson, the caisson may be damaged. is there. In order to prevent such damage to the caisson, conventionally, a rubber material for cushioning such as a tire or a piece of wood that serves as a width stop material is suspended from the water surface above the caisson to the air in the upper part and used as a protective material for the caisson. .

  Patent Literature 1 includes an elastic bag body having a hollow portion, and an orifice that enables discharge of water filled in the bag body to the outside, and a buffer material for placing an underwater structure attached to an underwater structure such as a caisson. Is disclosed. Patent Document 2 discloses a buffer body in which an elastic body in which a wire is embedded is disposed inside the elastic body, and a space is formed in the elastic body by pulling out the wire. Compressed between. Patent document 3 discloses disposing an air bag between a caisson and a caisson.

Japanese Patent Laid-Open No. 03-33323 JP 09-217331 A JP 09-195281 A

  The rubber materials such as tires and the protective materials for the wood pieces that serve as the width stop materials as described above are mainly arranged in the aerial part, and the caisson and the existing caisson are affected by the vertical distribution of the flow in the underwater part and the rolling effect of waves. The effect on contact with water in water could not be expected. Each of Patent Documents 1 to 3 requires a special buffer body / buffer material. Also, since the protective material is removed after the caisson is installed, a protective material that is easy to remove is required.

  In view of the problems of the prior art as described above, the present invention can reliably prevent contact with an existing underwater structure in water and in the air when installing the underwater structure while having a simple structure. It is another object of the present invention to provide an underwater structure contact protective material and an underwater structure installation method that are easy to remove.

  The underwater structure contact protection material for achieving the above object is a method of forming a plurality of sand bags having a length shorter than the height of the underwater structure and filled with a sand-based filler by a rope-like member. It is provided with the connection body connected with the length about the height of the underwater structure.

  According to this underwater structure contact protective material, a connecting body in which a plurality of sand bags filled with a filler mainly composed of sand are connected by a rope-like member such as a rope or a wire, a hose that can be filled with sand, etc. Can be easily manufactured from materials that can be easily procured, such as sand, rope, wire, etc. Since it is about the height of an object and can be suspended from the top to the bottom of an underwater structure, when installing an underwater structure, Contact can be reliably prevented. Moreover, the whole surface of a structure can be protected by arrange | positioning a connection body at least 2 rows. Further, after the underwater structure contact protection material is used, the sand bag can be torn and the filler can be easily discharged, so that the underwater structure contact protection material can be easily removed.

  In the underwater structure contact protection material, at least two rows of the coupling bodies are arranged, and a rigid rod-like body is arranged in a lateral direction with respect to each coupling body and connected to each coupling body, thereby affecting the influence of water flow in the underwater portion. It becomes difficult to receive, and each connected body can maintain verticality. In addition, it is preferable to arrange a plurality of rod-like bodies at predetermined intervals in the vertical direction.

  In this case, it is preferable that an auxiliary rope-shaped member is disposed between the link bodies substantially parallel to the link body, and the auxiliary rope-shaped member and the rod-shaped body are connected.

  The plurality of sand bags are made of, for example, a long rope-shaped member such as a rope or a wire that penetrates a plurality of short hollow materials such as a hose, and then the sand is filled in each hollow material. It can be easily manufactured by tightening and closing both ends with a tightening means such as a hose clip. In this case, it is preferable to provide means for preventing the sand bag from slipping off at the lower end side of each sand bag.

  An underwater structure installation method for achieving the above object is an installation method of installing an underwater structure, and when installing an underwater structure that is placed close to an existing underwater structure, The underwater structure is installed after the above-mentioned underwater structure contact protective material is attached to the surface of the underwater structure from the top to the bottom.

  According to this underwater structure installation method, the underwater structure contact protection material has a length about the height of an underwater structure such as a caisson and can be suspended from the top to the bottom of an existing underwater structure. Therefore, when installing another underwater structure, a contact with the existing underwater structure can be reliably prevented in water and in the air. Moreover, the whole surface of an underwater structure can be protected by arrange | positioning a connection body at least 2 rows. In addition, after using the underwater structure contact protection material, the sand bag can be torn and the filler mainly composed of the sand inside can be easily discharged, so that the underwater structure contact protection material can be easily removed.

  According to the underwater structure contact protection material and the underwater structure installation method of the present invention, when the underwater structure is installed, the underwater structure contact method with the existing underwater structure is prevented. It can be reliably prevented and damage to the underwater structure can be prevented. It is also easy to remove the underwater structure contact protective material after use.

It is a front view which shows the principal part of the underwater structure contact protection material by this Embodiment. 2 is a cross-sectional view (a) of the sand bag in the process of manufacturing the underwater structure contact protection material of FIG. 1 viewed from the front, and a cross-sectional view (b) of the completed sand bag viewed from the front. It is a perspective view which shows the example which arrange | positioned and suspended the underwater structure contact protection material 1 comprised from the connection bodies 10 and 10 of FIG. 1 on the side surface of the existing caisson. It is a flowchart for demonstrating the underwater structure installation process of this embodiment. It is a front view which shows a mode that a caisson is installed in the installation process of FIG. It is a perspective view for demonstrating the removal process of the underwater structure contact protection material 1 of FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a main part of the underwater structure contact protection material according to the present embodiment. 2 is a cross-sectional view (a) of the sand bag in the process of manufacturing the underwater structure contact protection material of FIG. 1 viewed from the front, and a cross-sectional view (b) of the completed sand bag viewed from the front.

  As shown in FIG. 1, the underwater structure contact protection material 1 includes left and right connecting bodies 10 and 10 in which a plurality of sand bags 11 filled with sand are connected in a row with wires 12. The length of each sand bag 11 is sufficiently shorter than the height of the underwater structure on which the underwater structure contact protection material 1 is disposed. Moreover, since the whole length of each connection body 10 and 10 is substantially equal to the height of the underwater structure in which the underwater structure contact protection material 1 is arrange | positioned, it suspends from the top edge of a underwater structure to a lower end. Is possible.

  As shown in FIG. 2A, the sand bag 11 is formed by cutting a hose 11a, which is a flexible hollow material such as a synthetic resin, into a predetermined length and placing a flexible wire 12 in the hose 11a. After one end of the hose 11a is tightened and closed with a fastening means such as a known hose clip 11b, and the sand 9 is filled and filled in the hose 11a, the other end is similarly set as shown in FIG. It can be manufactured by tightening and closing with the hose clip 11b.

  The wire 12 has a length corresponding to the height of the underwater structure on which the underwater structure contact protection material 1 is disposed. Thus, the overall length of the produced connecting body 10 is underwater structure contact protection. It becomes substantially equal to the height of the underwater structure where the material 1 is arranged. Since the length of each sand bag 11 is considerably shorter than the height of the underwater structure, a large number of sand bags 11 are connected to the connecting body 10.

  Further, as shown in FIGS. 2A and 2B, a wire clip 11c is attached and fixed to the wire 12 on the lower end side of each sand bag 11 as means for preventing the sand bag 11 from falling off. Since the sand packed in the sand bag 11 acts for example about 10 kg even under weight, the hose clip 11b may be displaced and the sand bag 11 may be displaced and fall. If it approaches, the buffer effect cannot be exerted in a well-balanced manner, which may lead to problems such as breakage of the sand bag 11. However, by attaching and fixing the wire clip 11 c to the wire 12, the sand bag 11 is dropped due to the displacement of the sand bag 11. Can be prevented. Thereby, each sandbag 11 can be hold | maintained in the coupling body 10 at equal intervals.

  As shown in FIG. 1, a rigid rod-like body 13 made of a reinforcing bar or the like is arranged in the lateral direction so as to be orthogonal to each of the coupling bodies 10, 10 in a plane formed by the two rows of coupling bodies 10, 10. , 10 are connected by a binding band or the like. In this case, it is preferable to arrange the plurality of rod-like bodies 13 and 13 at predetermined intervals in the vertical direction. Further, a plurality of auxiliary ropes 14 and 14 are arranged between the connecting bodies 10 and 10 substantially in parallel with the connecting bodies 10 and 10, and the auxiliary ropes 14 and 14 and the rod-like body 13 are connected by a binding band or the like. Yes.

  In addition, as shown in FIG. 1, the interval w between the two rows of connected bodies 10, 10 is determined according to the width of the underwater structure to which the underwater structure contact protection material 1 is attached. For this reason, the length of the rod-like bodies 13 and 13 also corresponds to the width of the underwater structure.

  FIG. 3 is a perspective view showing an example in which the underwater structure contact protection material 1 composed of the coupling bodies 10 and 10 of FIG. 1 is arranged and hung on the side surface of an existing caisson.

  As shown in FIG. 3, the caisson 30 is already installed on the bottom G for the construction of a gravitational quay or a revetment, but the next caisson is installed and arranged on the side surface 30 a of the caisson 30. In the vicinity of both ends of the side surface 30a of the caisson 30, the coupling bodies 10 and 10 are suspended vertically from the upper end to the lower end of the caisson 30, respectively, and the upper ends of the coupling bodies 10 and 10 are fixed. When the caisson 30 has the inclined surface 22 on the upper side as shown in FIG. 3, the suspension member 21 made of a steel frame or the like is attached to the top end by an anchor or the like so as to protrude from the top end, and the suspension member 21 The connecting body 10 is suspended from the tip of the. In this way, the underwater structure contact protection material 1 is installed on the side surface 30 a of the existing caisson 30.

  In this case, the positions in the vicinity of both ends of the side surfaces 30a of the coupling bodies 10, 10 are preferably slightly inward from each end, for example, about -10 cm from the end.

  In addition, in the example of FIG. 3, arrangement | positioning of the rod-shaped body 13 and the auxiliary rope 14 of FIG. 1 is abbreviate | omitted. In the underwater structure contact protection material 1, the rod-like body and the auxiliary rope are preferably arranged as necessary.

  According to the underwater structure contact protection material 1 of the present embodiment, the connecting body 10 in which a plurality of sand bags 11 filled with sand are connected by wires 12 is a bag-like body made of a hose, a wire, a rope, sand, or the like. It can be easily manufactured from materials that are easy to procure, has a simple structure, has a length about the height of the caisson 30, and can be hung from the top to the bottom of the caisson 30, so another caisson structure can be When installing, contact with the existing caisson 30 can be reliably prevented in water and in the air. Moreover, the whole side surface 30a of the caisson 30 can be protected by arrange | positioning the connection bodies 10 and 10 at least 2 rows.

  In addition, as shown in FIG. 1, a rigid rod-like body 13 is arranged in the horizontal direction with respect to the two rows of coupling bodies 10, 10 and connected to each coupling body 10, 10 to restrain the coupling bodies 10, 10. The displacement of the coupling bodies 10 and 10 can be reduced even in a place where there is a water flow in the underwater part where the caisson 30 is installed. Thus, each connection body 10 and 10 becomes difficult to receive the influence of a water flow, and can maintain verticality.

  Further, a plurality of auxiliary ropes 14 and 14 are arranged between the connecting bodies 10 and 10 substantially in parallel with the connecting bodies 10 and 10, and the auxiliary rope 14 and the rod-like body 13 are connected. This is more preferable for supporting the body 13 in an auxiliary manner and maintaining the verticality of the connecting body 10. Therefore, the rod-shaped body 13 and the auxiliary rope 14 can exhibit the effect by installing when the connecting bodies 10 and 10 are not stable in a region where the water depth is large and the flow velocity is large.

  Next, referring to FIGS. 4, 5, and 6 for steps S01 to S04 in which the caisson is installed on the side of the existing caisson using the underwater structure contact protection material 1 constituted by the coupling bodies 10 and 10 of FIG. To explain.

  FIG. 4 is a flowchart for explaining the underwater structure installation step of the present embodiment. FIG. 5 is a front view schematically showing how a caisson is installed in the installation step of FIG. 4. FIG. 6 is a perspective view for explaining a removal process of the underwater structure contact protection material 1 in FIG. 4.

  As shown in FIG. 5, a caisson 30 as shown in FIG. As shown in FIG. 3, the connectors 10 and 10 are suspended from the existing caisson 30 to install the underwater structure contact protection material 1 on the side surface 30a of the caisson 30 (S01). A crane etc. can be used for installation of these coupling bodies 10 and 10.

  Next, the newly installed caisson 31 is transported by a ship or the like (S02), and the caisson 31 is suspended by the crane CR of the hoist ship SH and installed from the water surface S to a predetermined position on the bottom G (S03).

  As shown in FIG. 5, the newly installed caisson 31 is installed such that its side surface 31 a approaches the side surface 30 a of the existing caisson 30 and has a predetermined interval. At this time, it is suspended by the crane CR. Even if the corner portion 31b of the caisson 31 approaches the side surface 30a of the existing caisson 30 and there is a risk of contact or collision, the side surface 30a has an underwater structure composed of the coupling bodies 10 and 10 of FIG. Since there is the object contact protection material 1, the corner portion 31b does not hit the side surface 30a but hits the sand bag 11 of the coupling bodies 10, 10, and the sand bag 11 serves as a cushion material. Thus, when the caisson 31 is installed side by side on the existing caisson 30, contact / collision of both caissons 30, 31 can be prevented, and damage to both caissons 30, 31 due to contact / collision can be prevented.

  Next, each connection body 10 and 10 of the underwater structure contact protection material 1 is removed from the side surface 30a of the caisson 30 (S04). In this case, as shown in FIG. 6, after the diver D tears the sand bag 11 of the connecting body 10 with a cutter CU or the like and discharges the sand inside, it can be easily removed by lifting the connecting body 10. Since each connection body 10 and 10 is located in the end part vicinity of the caisson 31, there is no trouble in the work of a diver.

  As described above, according to the underwater structure installation method of the present embodiment, the connecting bodies 10, 10 connected to the plurality of sand bags 11 of the underwater structure contact protection material 1 are attached to the side surface 30 a of the existing caisson 30. Since it is suspended from the end to the lower end, when another caisson 31 is installed, contact with the existing caisson 30 can be reliably prevented in water and in the air. For this reason, caisson installation construction can be managed reliably and a caisson can be installed stably.

  In the case of conventional rubber materials such as tires and protective materials for wood pieces that serve as width stop materials, when caisson is installed, no effect can be expected on contact with the existing caisson in water. According to this, since the underwater structure contact protection material 1 is suspended from the top end of the existing caisson 30 to the lower end of the water, when installing another caisson 31, not only in the air but also in the water, It is possible to reliably prevent contact between the two.

  It is not preferable to leave rubber, wood, steel, etc., as a cushioning material in the water, because it is not preferable for the water or the bottom environment. When the connecting body 10 is configured, the gap between the caisson and the adjacent caisson is narrow, and when the connecting body 10 cannot be removed by the lifting method, the material in the sand bag 11 is especially made of sand with less fine particles. For example, even if the sand bag is broken and the filling material falls into the water, the pollution does not occur and the subsequent bottom environment is not affected.

  As described above, the modes for carrying out the present invention have been described. However, the present invention is not limited to these, and various modifications can be made within the scope of the technical idea of the present invention. For example, in the present embodiment, the case where the caisson is installed side by side with the existing caisson has been described as an example, but the present invention is not limited to this, and the case where the underwater structure is installed in another existing underwater structure. It is also applicable to.

  In addition, the underwater structure contact protection material 1 as shown in FIG. 1 can be manufactured on land and then attached to an existing caisson using a crane or the like. You may make it attach in water. For example, the connecting body 10 produced on land is suspended from the top of the caisson, and the rod-shaped body 13 is connected to the connecting body 10 and the auxiliary rope 13 by a diving operation, and then the connecting body 10 is further suspended. Similarly, the next bar 13 may be connected.

  Further, the vertical length of each sand bag 11 in FIG. 1 is about 60 cm, for example, the unit length d1 between the sand bag 11 and the wire 12 is about 1 m, for example, and the arrangement distance d in the vertical direction of the rod-like bodies 13 and 13 is d. Can be about 5 m, for example, but is not limited thereto, and is appropriately determined according to the height of the caisson, the state of the water flow at the installation position, and the like.

  The filler to be packed in the sand bag 11 is mainly composed of sand, and is preferably all sand, but may be a mixture of sand and soil. In this case, when discharging the filler of the sand bag 11 into the water as described above, it is preferable that the underwater pollution does not occur so much and the subsequent bottom environment is hardly affected.

  Moreover, the sand bag 11 cuts the hose which is flexible hollow materials, such as a product made from a synthetic resin, to predetermined length, stuffs and fills the hose with sand, and the hose upper and lower ends are known hose clips or the like. Are closed and individually manufactured, and then a plurality of sand bags 11 and 11 are connected with wires and ropes, and the entire length of the connecting body 10 is set to the underwater structure contact protective material 1. It may be made substantially equal to the height of. Alternatively, the sand bag 11 may be individually manufactured by filling and filling a bag-like body made of synthetic resin fiber whose lower end is closed in advance with the sand filled.

  According to the underwater structure contact protection material and the underwater structure installation method of the present invention, when the underwater structure is installed, the underwater structure contact method with the existing underwater structure is prevented. Since it can be reliably prevented and damage to the underwater structure can be prevented, installation work of the underwater structure such as a caisson can be reliably managed, and the underwater structure can be stably installed.

DESCRIPTION OF SYMBOLS 1 Underwater structure contact protection material 9 Sand 10 Connection body 11 Sand bag 12 Wire 13 Rod-shaped body 14 Auxiliary rope 30 Existing caisson 30a Side surface 31 Caisson 31a Side surface 31b Corner | angular part w space | interval

Claims (4)

  A connection in which a plurality of sand bags having a length shorter than the height of the underwater structure and filled with a filler mainly composed of sand are connected to the length of the height of the underwater structure by a rope-like member. An underwater structure contact protective material comprising a body.   2. The underwater structure contact protection material according to claim 1, wherein the connecting bodies are arranged in at least two rows, and a rigid rod-like body is arranged in a lateral direction with respect to each connecting body and connected to each connecting body. .   The underwater structure contact protection material according to claim 2, wherein an auxiliary rope-shaped member is disposed between the link bodies substantially parallel to the link body, and the auxiliary rope-shaped member and the rod-shaped body are connected. . An installation method for installing an underwater structure,
The underwater structure contact protective material according to any one of claims 1 to 3 is provided on a surface of the existing underwater structure when the underwater structure arranged close to the existing underwater structure is installed. An underwater structure installation method, wherein the underwater structure is installed after the top end to the bottom end.

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