JP4782574B2 - Wavebreaking structure construction method and wavebreaking structure - Google Patents

Description

  The present invention relates to a construction method of a wave-breaking structure for protecting ships, land lives, buildings, and the like from wave overtopping waves and wave forces in harbors and coastal coastal areas.

  In harbors and coastal coastal areas, for example, flare-type wave-breaking structures have been conventionally used as breakwater protection structures such as breakwaters and quay walls to protect ships and land life and buildings from wave overtopping waves and wave power. ing.

  For example, as shown in Patent Document 1, this wave-breaking structure includes a rear steel plate that extends in the shore direction and curves in the vertical direction, and an offshore side wall surface portion formed of concrete so as to cover the entire offshore surface of the rear steel plate. The offshore wall surface is formed in a non-overtopping characteristic shape so that waves coming from the offshore side are repelled.

The offshore wall surface portion in the wavebreak structure is formed by placing concrete on the offshore surface of the rear steel plate. Specifically, first, a stat bolt and a reinforcing bar for reinforcing the shear strength of concrete are disposed on the offshore surface. The stud bolt is welded in an upright state with respect to the offshore surface of the rear steel plate. On the other hand, the reinforcing bars are arranged using the width stop bars 90 shown in FIG. The width stop bars 90 are for positioning the reinforcing bars 93 at a predetermined distance from the rear steel plate 91, and a fixing part 94 having a predetermined width in the left-right direction, and orthogonal to the fixing part 94 from both ends of the fixing part 94. The leg portion 95 extends in the direction of the movement, and the welded portion 96 is provided at the tip of the leg portion 95. Using such a width stop bar 90, first, the welded portion 96 and the back surface steel plate 91 are welded so that the width stop bar 90 is in an upright state with respect to the offshore surface 97 of the back surface steel plate 91. The reinforcing bar 93 is held from the offshore side so as to intersect with the fixing portion 94 of the width stop reinforcing bar 90 (by another instrument or the like), and a wire or the like is provided at the intersecting portion (hereinafter referred to as an intersecting portion). It is fixed by winding the binding wire. In this way, the reinforcing bar 93 is fixed so as not to be detached from the fixing portion 94, and the reinforcing bar 93 is fixed in a shape along the offshore surface 97 of the rear steel plate 91 by the plurality of width stopping bars 90. And after arrange | positioning the reinforcing bar 93 etc., the offshore side wall part is formed by placing concrete.
JP 2002-227167 A

  As described above, the reinforcing bar 93 is fixed by winding the binding wire around the reinforcing bar 93 and the fixing part 94 in a state where the reinforcing bar 93 intersects the fixing part 94. Therefore, in order to enable the winding, the fixing portion 94 must be held at a position separated from the offshore surface 97 by a predetermined dimension. From this relationship, the width stop bar 90 has a structure in which leg portions 95 are formed from both ends of the fixing portion 94, and the leg portions 95 are welded to the offshore surface 97. Therefore, in order to weld one width stop bar 90 to the offshore surface 97, two welding points (welded portions 96) are required. When this number of welding points increases, there is a problem that materials and work time required for welding work increase.

  In particular, when the reinforcing bar 93 is disposed in a vertically extending posture as shown in FIG. 10, in order to sufficiently suppress the bending deformation due to the weight of the reinforcing bar 93, the holding point of the reinforcing bar 93 by the width stop reinforcing bar 90 is sufficient. Thus, the number of width stop bars 90 must be increased, and as the number of width stop bars 90 increases, the number of welds increases.

  The present invention has been made in view of such problems, and is manufactured even when the number of members fixing the reinforcing bars is increased in order to maintain the posture of the reinforcing bars disposed on the rear steel plate. It aims at providing the construction method of the wave-proof structure which can hold down cost.

  In order to solve the above problems, the construction method of the wave-breaking structure of the present invention includes a back steel plate having a shape extending in a direction along the shore and having a curved cross section viewed from the same direction, and an offshore surface of the back steel plate. In the construction method of a wave-breaking structure having an offshore wall surface portion made of concrete in a wavebreaking shape that repels waves on the offshore side, as a step of forming the offshore wall surface portion, one end portion is offshore of the back steel plate. A reinforcing bar fixing member having a base portion having a welded portion to be welded to the side surface, and a hook portion provided at the other end portion of the base portion and capable of temporarily holding the reinforcing bar by supporting the reinforcing bar from the offshore side. A step of fixing the base portion in an upright state with respect to the offshore surface by welding the welded portion of the base portion and the offshore side surface, and hooking the reinforcing bar to a hooking portion of the reinforcing bar fixing member, And in this hook And fixing the serial rebar, it is characterized by comprising the step of pouring the concrete offshore surface of the rear steel plate.

  According to this configuration, the reinforcing bar can be hooked on the hook portion provided at the other end of the base portion of the reinforcing bar fixing member, and the reinforcing bar can be fixed at the hook portion. Thus, even if it is not the structure which extends a leg part from the both ends of the fixing | fixed part connected with a reinforcing bar, it becomes possible to fix a reinforcing bar fixing member and a reinforcing bar. Therefore, welding of the reinforcing bar fixing member and the rear steel plate can be performed at one place of the welded portion at one end of the base portion in a state where the base portion stands upright with respect to the offshore surface of the rear steel plate. That is, compared with the case where the reinforcing bars are fixed using the conventional width stop bars, the number of welding points is reduced, and the manufacturing cost can be reduced by reducing the welding points. Therefore, even when the reinforcing bar fixing members are increased in order to maintain the posture of the reinforcing bar, the number of welding points can be reduced as compared with the case of using the conventional width stop reinforcing bar, so the posture of the reinforcing bar is maintained at a low cost. be able to.

  Further, in the conventional construction method using the width stop bars, the fixed portion of the width stop bars is a rod-shaped member extending in one direction, and therefore, the reinforcing bars are arranged so that the fixed portions and the reinforcing bars intersect. However, the fixed part and the reinforcing bar may be separated. Therefore, it was necessary to maintain the state in which the reinforcing bars intersect the fixed part of the width stop bars by using other instruments, etc., but in the present invention, the reinforcing bars are hooked on the hooks, so that the reinforcing bars are offshore. The work can be performed in a state where the reinforcing bars are temporarily supported. Accordingly, the use of a tool for holding the reinforcing bars can be made unnecessary or simplified, so that an increase in manufacturing cost can be suppressed.

Further, as a concrete means for fixing the reinforcing bar , the step of fixing the reinforcing bar fixing member includes fixing a reinforcing bar fixing member having a bent portion bent in a specific direction to a hooking portion of the base, and fixing the step, from a state in which the direction in which the bending direction and the reinforcing bars extend in the bent portion is hooked on the bend portion of the reinforcing bars so as to intersect, bending deformation of the bent portion along the outer peripheral surface of the reinforcing bar by winding the reinforcing bar by, it may include to be performed by fixing the reinforcing bars to the bending portion.

  According to this structure, since the said reinforcing bar is fixed to a bending part by further bending-deforming the bending part in a hook part, a reinforcing bar can be fixed only with a reinforcing bar fixing member. Therefore, compared to the conventional construction method in which the width stop bars and the reinforcing bars are fixed using the binding wire, the reinforcing bars can be fixed with one member, so that the material cost of the wave-breaking structure can be reduced. it can.

Furthermore, as another means for fixing the reinforcing bar , the step of fixing the reinforcing bar fixing member includes fixing a reinforcing bar fixing member having a bent portion bent in a specific direction to a hooking portion of the base, and the step of fixing, in a state where the direction in which the bending direction and the reinforcing bars extend in the bent portion is hooked on the bend portion of the reinforcing bars so as to intersect, by winding the binding wire to said said bend rebar, It may include fixing the reinforcing bar to the bent portion.

  According to this configuration, the reinforcing bar can be fixed with a simple configuration in which a binding wire is wound around the bending part and the reinforcing bar while the reinforcing bar is hooked on the bending part so that the bending part and the reinforcing bar cross each other. Fixing workability can be improved.

Further, in the step of fixing the reinforcing bar fixing member, a top portion that bulges in a direction perpendicular to a direction in which the base portion extends is formed at the other end portion of the base portion extending in one direction rather than a weld portion of the base portion. It is preferable to include fixing the reinforcing bar fixing member.

  According to this configuration, since the base portion of the reinforcing bar fixing member has a top portion that bulges than the welded portion of the base portion, the shear strength of the concrete offshore wall portion is enhanced, and the offshore wall The effect of the stud bolt of preventing the surface portion from peeling from the rear steel plate can be achieved. Therefore, material cost can be reduced compared with the case where a stud bolt and a reinforcing bar fixing member are arranged separately.

  Also, a back steel plate that has a shape that extends in the direction along the shore and has a curved section viewed from the same direction, and an offshore wall that is made of concrete in a wave-proof shape that repels waves offshore on the offshore surface of this backside steel plate In the construction method of the wave-breaking structure having a surface portion, as the step of forming the offshore wall surface portion, one end portion has a welded portion welded to the offshore surface of the back steel plate, and the other end portion is a reinforcing bar. By welding the welding portion and the offshore surface, a reinforcing bar fixing member that has a reinforcing bar abutting surface that abuts and a concave groove for winding a binding wire around the outer circumferential surface is formed in the circumferential direction. A step of fixing in an upright state with respect to the offshore surface; and a step of bringing the reinforcing bar into contact with the reinforcing bar contact surface in a state in which the reinforcing bar is along the offshore surface of the rear steel plate, Winding a binding wire around the groove and the reinforcing bar More, the step of fixing the said reinforcing bar fixing member and the reinforcing bars, or may be performed by a step of pouring the concrete offshore surface of the rear steel plate.

  According to this configuration, the binding wire is attached to the concave groove formed in the reinforcing bar fixing member and the reinforcing bar in a state where the reinforcing bar is in contact with the reinforcing bar contact surface formed at the other end of the reinforcing bar fixing member. By winding, the reinforcing bar can be fixed to the reinforcing bar fixing member. That is, by winding the binding wire around the concave groove, the reinforcing bar can be fixed in a state of being in contact with the reinforcing bar contact surface. Therefore, even if it is not the structure which extends a leg part from the both ends of the fixing part connected with a reinforcing bar like the conventional width stop reinforcing bar, fixation of a reinforcing bar fixing member and a reinforcing bar is attained. That is, the welding of the reinforcing bar fixing member and the rear steel plate is performed at one place of the weld formed at one end of the reinforcing bar fixing member in a state where the reinforcing bar fixing member is upright with respect to the offshore surface of the rear steel plate. Can be done. Therefore, the number of welding points can be reduced as compared with the case where the reinforcing bars are fixed using the conventional width stop bars, and the manufacturing cost can be reduced by reducing the welding points.

  Further, in the step of fixing the reinforcing bar fixing member, the head has a top portion extending in one direction and bulging from the welded portion in a direction perpendicular to a direction perpendicular to the offshore surface of the rear steel plate. It is preferable to fix the reinforcing bar fixing member in which the reinforcing bar contact surface is formed on the end face of the top.

  According to this configuration, since the reinforcing bar fixing member has a top portion that bulges than the welded portion, the shear strength of the concrete offshore wall surface portion is enhanced, and the offshore wall surface portion is peeled off from the rear steel plate. The effect of the stud bolt of preventing it can be produced. Therefore, material cost can be reduced compared with the case where a stud bolt and a reinforcing bar fixing member are arranged separately.

  Moreover, the construction method can provide a wave-proof structure with low cost and good design accuracy.

  According to the construction method of the wave-breaking structure of the present invention, it is possible to form the wave-breaking structure while suppressing an increase in manufacturing cost due to material cost, welding work time, and the like.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view schematically showing the structure of a wave-breaking structure in the first embodiment of the present invention, showing a completed wave-breaking structure on the back side of the perspective view, and showing the steps in order from the front side. It is a thing.

  The wave-breaking structure 1 in FIG. 1 includes an offshore wall surface portion 11 of a concrete structure and a frame structure 12 that is located on the land side of the offshore wall surface portion 11 and is assembled with a metal aggregate.

  On the offshore side of the framework structure 12, there is provided a back steel plate 13 having a shape extending along the shore and having a curved section viewed from the direction along the shore. Specifically, the back steel plate 13 is supported by the frame structure 12 from the back surface side of the offshore surface 13a of the back steel plate 13 so as to maintain a posture having a concave surface on the offshore side.

  The offshore wall surface portion 11 is a concrete wall formed to have a predetermined thickness so as to cover the entire offshore surface 13a of the back steel plate 13. The offshore side surface of the offshore wall surface portion 11 is designed to have a shape having a wave preventing characteristic that repels waves coming from the offshore side. The cross section seen from the shore direction of the offshore side wall surface portion 11 has a curved shape that is concave on the offshore side, and has a portion protruding to the offshore side at the top.

  A stud bolt 14 which is a metal rod-shaped member extending in one direction is disposed on the offshore surface 13a of the rear steel plate 13, and is welded in a state of being substantially perpendicular to the offshore surface 13a. It is fixed by. The stud bolt 14 extends perpendicularly to the offshore surface 13a from a welded portion welded to the offshore surface 13a, and a tip portion of the stud bolt 14 bulges in a direction perpendicular to the direction in which the stud bolt 14 extends. have. Such stud bolts 14 are arranged over substantially the entire surface with respect to the offshore side surface 13a of the back steel plate 13 so as to keep a constant distance from each other.

  Further, on the offshore surface 13a of the rear steel plate 13, a reinforcing bar 15 which is a metal bar member extending in one direction is disposed, and the reinforcing bar 15 extending in the vertical direction and the reinforcing bar 15 extending in the left-right direction are mutually connected. They are arranged so as to be orthogonal. The reinforcing bar 15 extending in the vertical direction is fixed to the offshore surface 13a of the rear steel plate 13 by a reinforcing bar fixing member 20 described later, and is fixed in a state along the offshore surface 13a when viewed from the side. The reinforcing bar 15 extending in the left-right direction is fixed by being welded to the reinforcing bar 15 extending in the up-down direction. By arranging the reinforcing bars 15 and the stud bolts 14, the shear strength of the offshore wall surface portion 11 is enhanced.

  Further, a metal rod-shaped reinforcing bar fixing member 20 is provided on the offshore side surface 13a of the rear steel plate 13, and is fixed by welding in a state of being substantially perpendicular to the offshore side surface 13a. . And this reinforcing bar fixing member 20 is arrange | positioned in the predetermined place over the up-down direction of the offshore side surface 13a, and the reinforcing bar 15 is fixed to this reinforcing bar fixing member 20, and the reinforcing bar 15 extended in an up-down direction is offshore. It is fixed in a shape along the side surface 13a. The offshore surface 13a is provided with a plurality of rows of reinforcing bar fixing members 20 arranged in the vertical direction.

  Here, FIG. 2 is an enlarged view of the reinforcing bar fixing member 20. The reinforcing bar fixing member 20 includes a base portion 21 that is welded to the offshore surface 13 a of the rear steel plate 13 and a hooking portion 22 for fixing the reinforcing bar 15.

  The base portion 21 has a rod-shaped portion 21a extending in one direction and a top portion 21b bulging in a direction perpendicular to the extending direction of the rod-shaped portion 21a. That is, the illustrated base 21 has the same shape as the stud bolt 14, and this base 21 also has the function of a stud bolt. Moreover, the one side edge part (lower side edge part in FIG. 2) of the said rod-shaped part 21a is the welding part 21c welded with the offshore side surface 13a of the back surface steel plate 13, and, specifically, the rod-shaped part 21a is extended. An end face 21d perpendicular to the direction is formed, and the end face 21d and the offshore surface 13a are welded in contact with each other, so that the base portion 21 stands upright with respect to the offshore surface 13a. It can be fixed.

  The top part 21b is formed with an end face 21e perpendicular to the extending direction of the rod-like part 21a. The hook portion 22 is formed so as to extend from the end surface 21e, and has a substantially linear portion and a bent portion 22a bent at a predetermined curvature. Specifically, it extends in a direction in which the rod-shaped portion 21a extends from a substantially central portion of the end surface 21e in the top portion 21b, is bent so as to change the direction by 180 °, and is further parallel to the extending direction of the rod-shaped portion 21a. It is formed to extend. That is, the hook portion 22 is formed in a hook shape. The reinforcing bar 15 can be hooked to the hooking part 22 by bringing the reinforcing bar 15 into contact with the inner part of the bent part 22 a of the hooking part 22. The hook portion 22 is formed of a metal bar having a smaller diameter than the base portion 21 and can be bent and deformed in the bending direction of the bending portion relatively easily than the base portion 21.

  Next, the construction method of the said wave-proof structure 1 is demonstrated.

  As shown from the front side of FIG. 1, first, a frame structure 12 is obtained by welding and assembling metal aggregates. Then, the rear steel plate 13 is fixed to the offshore side of the frame structure 12. Specifically, it fixes by welding the back surface of the offshore side surface 13a of the back surface steel plate 13, and the said frame structure 12. As shown in FIG.

  Next, the offshore wall surface portion 11 is formed on the offshore surface 13 a of the back steel plate 13.

  First, the stud bolt 14 and the reinforcing bar fixing member 20 are welded to the offshore side surface 13 a of the back steel plate 13. Specifically, the stud bolts 14 are welded and fixed so that the stud bolts 14 are spaced apart from each other across the up-down direction and the left-right direction of the offshore surface 13a. And in a predetermined location, it replaces with this stud bolt 14, and the reinforcing bar fixing member 20 is welded. Specifically, in the design, when the reinforcing bar 15 extending in the vertical direction is fixed to the reinforcing bar fixing member 20, the reinforcing bar fixing member 20 can maintain the shape of the reinforcing bar 15 along the offshore surface 13 a of the rear steel plate 13. The arrangement position and quantity are determined. In the present embodiment, for example, as shown in FIG. 3, the stud bolts 14 and the reinforcing bar fixing members 20 are disposed so as to be alternately positioned in the vertical direction.

  Here, the reinforcing bar fixing member 20 is in a state where the end surface 21d of the welded portion 21c of the reinforcing bar fixing member 20 and the offshore side surface 13a are in contact with each other, with respect to the contact portion between the welded portion 21c and the offshore side surface 13a. Welding by using a stud gun or the like. By this welding, the reinforcing bar fixing member 20 is fixed to the offshore surface 13a of the rear steel plate 13 with the base 21 standing upright with respect to the offshore surface 13a. In this way, a plurality of reinforcing bar fixing members 20 are juxtaposed in a row in the up-down direction on the offshore side surface 13a of the back steel plate 13. The reinforcing bar fixing member 20 is fixed so that the bending direction of the bent portion 22a is parallel to the horizontal direction of the offshore surface 13a.

  Next, the reinforcing bar 15 is disposed on the offshore surface 13a where the stud bolt 14 and the reinforcing bar fixing member 20 are disposed. First, the reinforcing bars 15 are hooked on the hook portions 22 of the reinforcing bar fixing members 20 arranged in the vertical direction. Specifically, as shown in FIGS. 2 and 4, the reinforcing bar 15 is brought into contact with the inner part of the bent part 22 a in the hook part 22 so that the bending direction of the bent part 22 a intersects the direction in which the reinforcing bar 15 extends. Let Thereby, although the upper part of the reinforcing bar 15 tends to bend and deform downward due to its own weight, the reinforcing bar 15 is supported by the bent part 22a of the hook part 22 from the offshore direction, so that the shape substantially follows the offshore surface 13a. Is hooked to the hooking portion 22 in a state where the above is maintained. That is, the reinforcing bar 15 is temporarily held in a posture substantially along the offshore surface 13 a by the bent portion 22 a of the hook portion 22.

  Then, the reinforcing bar 15 is fixed to the reinforcing bar fixing member 20 from the state where the reinforcing bar 15 is temporarily held. Specifically, as shown in FIG. 5, the bent portion 22 a is moved to the outer periphery of the reinforcing bar 15 from the state where the reinforcing bar 15 is in contact with the bent portion 22 a of the hook portion 22 (the state where the reinforcing bar 15 is hooked on the bent portion 22 a). By bending and deforming along the surface 15 a, the bending portion 22 a is wound around the outer peripheral surface 15 a of the reinforcing bar 15 and the reinforcing bar 15 is fixed to the reinforcing bar fixing member 20. In this way, the reinforcing bars 15 are fixed in a shape along the offshore surface 13a of the rear steel plate 13.

  Further, as described above, after the reinforcing bars 15 are arranged in the vertical direction, they are also arranged in the horizontal direction. The reinforcing bars 15 arranged in the left-right direction are fixed by welding to the reinforcing bars 15 arranged in the up-down direction at predetermined positions. That is, the reinforcing bars 15 are arranged on the offshore surface 13 a of the back steel plate 13 in a lattice shape extending in the vertical direction and the horizontal direction.

  Next, concrete is placed on the offshore surface 13a of the back steel plate 13 on which the reinforcing bars 15 and the like are disposed. Specifically, a mold frame (not shown) formed in a wave-proof shape is arranged so as to face the back steel plate 13 manufactured as described above, and concrete is placed between the back steel plate 13 and the mold frame. To do. Thereby, the offshore side surface 13a of the offshore wall surface part 11 is shape | molded by the formwork in a wave-proof shape. That is, the offshore wall surface portion 11 shown in FIG. 1 is obtained. And the precast upper concrete 16 can be installed, and if necessary, the root surrounding covering block 17 can be installed and the wave-proof structure 1 can be obtained.

  Thus, in the construction method of the wave-breaking structure 1 in the first embodiment, the reinforcing bar 15 can be fixed by being hooked on the hooking portion 22 of the reinforcing bar fixing member 20, so that it is like a conventional width-retaining bar. Even if it is not the structure which extends a leg part from the both ends of the fixing part connected with a reinforcing bar, fixation with a reinforcing bar fixing member and a reinforcing bar is attained. Therefore, welding of the reinforcing bar fixing member 20 and the rear steel plate 13 is performed at one location of the welded portion 21c at one end of the base portion 21 with the base portion 21 standing upright with respect to the offshore surface 13a of the rear steel plate 13. Can be done. Therefore, compared with the case where the reinforcing bar 15 is fixed by using the conventional width stop bars, the number of welding points is reduced, and the manufacturing cost can be reduced by reducing the welding points. Further, since the reinforcing bar 15 can be temporarily held by the bent portion 22a of the reinforcing bar fixing member 20 supported from the offshore side, the reinforcing bar 15 and the reinforcing bar are fixed as compared with the case where the conventional width stop bars are used. The use of an instrument or the like for maintaining the state where the member 20 intersects can be made unnecessary or simplified.

  Moreover, in the said embodiment, since the reinforcement 15 and the bending part 22a can be fixed by carrying out bending deformation of the bending part 22a, the reinforcing bar 15 can be fixed by one member and reduction of material production cost. Can be achieved.

  In the first embodiment, the rebar 15 and the bent portion 22a are fixed by bending the bent portion 22a. However, as the second embodiment, as shown in FIG. The reinforcing bar 15 and the bent part 22a may be fixed by winding the binding wire 30 around the bent part 22a and the reinforcing bar 15 of the part 22. Specifically, from the state in which the reinforcing bar 15 is temporarily held by the bent portion 22a of the reinforcing bar fixing member 20, the binding wire 30 is wound around the reinforcing bar 15 and the bent portion 22a as shown in FIG. As the binding wire 30 in this case, a wire or the like can be used, as long as it can be wound around the reinforcing bar 15 and the bending portion 22a to fix them.

  In this 2nd Embodiment, since it fixes using the binding wire 30, the reinforcing bar 15 can be fixed to the bending part 22a with a simpler structure compared with the said 1st Embodiment. Therefore, workability for fixing the reinforcing bars 15 can be improved.

  In the above embodiment, the base 21 of the reinforcing bar fixing member 20 has the same shape as the stud bolt 14, and the base 21 also has the function of a stud bolt. In other words, the top 21b may not be formed, and only the rod-shaped portion 21a extending in one direction may be used. In this case, the reinforcing bar fixing member 20 has a structure in which a welded portion 21c is formed at one end portion of the rod-shaped portion 21a and a hook portion 22 is provided at the other end portion.

  Further, as a third embodiment, a reinforcing bar fixing member 20 shown in FIG. 7 may be used. Specifically, the reinforcing bar fixing member 20 shown in FIG. 7 has a rod-shaped portion 21a extending in one direction and a top portion 21b bulging in a direction perpendicular to the extending direction of the rod-shaped portion 21a. Yes. That is, the reinforcing bar fixing member 20 shown in FIG. 7 has substantially the same shape as the stud bolt 14 and has the function of a stud bolt. And it has the welding part 21c in the one side edge part (lower side edge part in a figure) of the rod-shaped part 21a. This welding part 21c is a site | part welded to the offshore side surface 13a of the back surface steel plate 13, like the said embodiment. In addition, a reinforcing bar abutting surface 21f is formed at the end of the crown portion 21b, and the reinforcing bar abutting surface 21f is formed to be perpendicular to the extending direction of the reinforcing bar fixing member 20. Furthermore, the outer peripheral surface 21h of the reinforcing bar fixing member 20 is formed with a concave groove 21g in the circumferential direction, and the binding wire 30 can be wound around the concave groove 21g.

  When the reinforcing bar 15 is fixed using the reinforcing bar fixing member 20 shown in FIG. 7, the reinforcing bar fixing member 20 shown in FIG. 7 is connected to the offshore surface 13 a of the rear steel plate 13 in the same manner as in the above embodiment. The fixing member 20 is fixed by welding in an upright state. And while holding the reinforcing bar 15 along the offshore side surface 13a, the reinforcing bar 15 and the reinforcing bar abutting surface 21f of the reinforcing bar fixing member 20 are brought into contact with each other, and the reinforcing bar 15 and the concave groove 21g of the reinforcing bar fixing member 20 are It fixes by winding the binding wire 30 around (refer FIG. 8). This fixing can be performed by the following procedure, for example.

  First, the binding wire 30 is wound around the concave groove 21g in the radial direction. Then, in a state where the reinforcing bar 15 is in contact with the reinforcing bar contact surface 21, the binding wire 30 is wound around the reinforcing bar 15 and the concave groove 21g, and is further wound around the concave groove 21g in the radial direction. Then, the binding wire 30 is tightened by twisting in the concave groove 21g. By this tightening, the binding wire 30 bites into the concave groove 21g, whereby the binding wire 30 is fixed to the concave groove 21g. Therefore, the binding wire 30 does not slip down in the extending direction of the reinforcing bar fixing member 20, and the reinforcing bar 15 is reliably fixed to the reinforcing bar abutting portion 20.

  According to the third embodiment, the reinforcing wire 15 is wound in the state where the reinforcing bar 15 is in contact with the reinforcing bar contact surface 21f by winding the binding wire 30 around the concave groove 21g formed in the reinforcing bar fixing member 20 and the reinforcing bar 15. Since it can fix, even if it is not the structure which extends a leg part from the both ends of the fixing | fixed part connected with a reinforcing bar like the conventional width stop reinforcing bar, fixation of a reinforcing bar fixing member and a reinforcing bar is attained. Therefore, even in a state where the reinforcing bar fixing member 20 is upright with respect to the offshore surface 13a of the rear steel plate 13, it is performed at one place of the welded portion 21c formed at one end of the reinforcing bar fixing member 20. Can do. Therefore, compared with the case where the reinforcing bar 15 is fixed using the conventional width stop bars, the number of welding points can be reduced, and the manufacturing cost can be reduced by reducing the welding points.

  In the third embodiment, the case where the reinforcing bar fixing member 20 has substantially the same shape as the stud bolt 14 and the reinforcing bar fixing member 20 also serves as the stud bolt has been described. The case where it is formed only by the rod-shaped part 21a extended in one direction may be sufficient. In this case, the reinforcing bar fixing member 20 is a substantially linear rod-shaped member, and has a configuration in which a welded portion 21c is formed at one end and a reinforcing bar contact surface 21f is formed at the other end.

  Moreover, in the said embodiment, although the case where the stud bolt 14 and the reinforcing bar fixing member 20 were arrange | positioned alternately was demonstrated, it may replace with all the stud bolts 14, and the case where the reinforcing bar fixing member 20 is provided, The case where the reinforcing bar fixing member 20 is provided at an appropriate position between the stud bolts 14 may be used.

  Moreover, although the said embodiment demonstrated the case where the wave-proof structure 1 was constructed using only any one among the reinforcing bar fixing members 20 demonstrated in the 1st-3rd embodiment, The wave-breaking structure 1 may be constructed using all the reinforcing bar fixing members 20 described in the embodiment in place.

It is a schematic perspective view which shows the structure of the wave-proof structure in embodiment of this invention. It is a figure which shows the reinforcing bar fixing member in 1st Embodiment. It is a side view which shows the state which fixed the reinforcing bar fixing member. It is a side view which shows the state which fixed the reinforcing bar to the reinforcing bar fixing member. It is an enlarged view which shows the state which fixed the reinforcing bar to the reinforcing bar fixing member in 1st Embodiment. It is an enlarged view which shows the state which fixed the reinforcing bar to the reinforcing bar fixing member in 2nd Embodiment. It is a figure which shows the reinforcing bar fixing member in 3rd Embodiment. It is an enlarged view which shows the state which fixed the reinforcing bar to the reinforcing bar fixing member in 3rd Embodiment. It is a figure for demonstrating the conventional width stop line. FIG. 10 is a side view of FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wave-proof structure 11 Offshore wall surface part 13 Back surface steel plate 13a Offshore surface 14 Stud bolt 15 Reinforcement 20 Reinforcement fixing member 21 Base 21b Top part 21c Welding part 21g Concave groove 22 Hooking part 22a Bending part 30 Binding wire

Claims (7)

A back steel plate that extends in the direction along the shore and has a curved shape when viewed from the same direction, and an offshore wall surface portion formed of concrete in a wave-proof shape that repels waves offshore on the offshore surface of the backside steel plate; In the construction method of the wave-breaking structure having
As a step of forming the offshore wall surface portion,
It is possible to temporarily hold the reinforcing bar by supporting the reinforcing bar from the offshore side while being provided at the base part having the welded portion whose one side end is welded to the offshore surface of the back steel plate. Fixing the reinforcing bar fixing member having a hook portion in a state where the base portion stands upright with respect to the offshore surface by welding the weld portion of the base portion and the offshore surface;
Hooking the reinforcing bar to the hook of the reinforcing bar fixing member, and fixing the reinforcing bar to the hook;
Placing concrete on the offshore surface of the rear steel plate;
The construction method of the wave-proof structure characterized by including. The step of fixing the reinforcing bar fixing member includes securing the rebar fixing member having a bent portion which is bent in a specific direction to the hook portion, the step of fixing the reinforcing bar, the bent portion of the bending direction and rebars From the state where the reinforcing bar is hooked on the bent part so that the direction in which the reinforcing bar extends is bent, the bent part is bent along the outer peripheral surface of the reinforcing bar and wound around the reinforcing bar, thereby bending the reinforcing bar. The construction method of the wave-proof structure of Claim 1 including fixing to a part. The step of fixing the reinforcing bar fixing member includes securing the rebar fixing member having a bent portion which is bent in a specific direction to the hook portion, the step of fixing the reinforcing bar, the bent portion of the bending direction and rebars in a state where the extending direction is hooked on the bend portion of the reinforcing bars so as to intersect, by winding the binding wire to said said bend rebar comprises securing the reinforcing bars to said bending portion, wherein Item 2. A construction method of the wave-proof structure according to Item 1 . The step of fixing the reinforcing bar fixing member, the other end of said base portion extending in one direction, the top portion that bulges in the direction forming an direction perpendicular of extension of the base than the welded portion of the base portion is formed rebar It includes securing the fixed member, the construction method of the breakwater structure according to claim 1. A back steel plate that extends in the direction along the shore and has a curved shape when viewed from the same direction, and an offshore wall surface portion formed of concrete in a wave-proof shape that repels waves offshore on the offshore surface of the backside steel plate; In the construction method of the wave-breaking structure having
As a step of forming the offshore wall surface portion,
Concave groove for winding the binding wire around the outer peripheral surface, with one side end having a welded portion welded to the offshore surface of the rear steel plate, and the other end having a rebar contact surface that contacts the rebar Fixing the reinforcing bar fixing member formed in the circumferential direction in a state of being upright with respect to the offshore surface by welding the welded portion and the offshore surface;
The reinforcing bar fixing member by winding the binding wire around the concave groove of the reinforcing bar fixing member and the reinforcing bar with the reinforcing bar contacting the reinforcing bar contact surface in a state where the reinforcing bar is along the offshore surface of the rear steel plate. And fixing the reinforcing bar,
Placing concrete on the offshore surface of the rear steel plate;
The construction method of the wave-proof structure characterized by including.   In the step of fixing the reinforcing bar fixing member, the head has a top portion that extends in one direction and bulges from the welded portion in a direction perpendicular to the direction perpendicular to the offshore surface of the rear steel plate. The construction method of the wave-proof structure according to claim 5, wherein a reinforcing bar fixing member in which the reinforcing bar contact surface is formed on an end face is fixed. A wave-proof structure manufactured by the construction method of the wave-proof structure according to claim 1.

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