JP4368327B2 - Housing, connecting structure of housing and method for arranging plate-like members - Google Patents

Description

The present invention relates Kagotai, the reinforcement method of the coupling structure and the plate-like member of the cage body.

  Various loads such as an out-of-plane force (an out-of-plane bending moment and an out-of-plane shear force) and an in-plane force (an axial force and a shear force) are applied to the flat concrete member. For wall-type piers, out-of-plane bending and shear are generally dominant. In addition, out-of-plane bending and shear are dominant in the upper and lower floor slabs of box-shaped underground structures such as box culverts.

  As reinforcing steel materials for these loads, deformed reinforcing bars and the like are arranged. Reinforcing bars for bending are called main reinforcing bars, reinforcing bars orthogonal to the reinforcing bars are called distribution reinforcing bars, and reinforcing bars arranged in the thickness direction of the flat plate are called shear reinforcing bars (band reinforcing bars, intermediate band reinforcing bars).

  Wall piers are subjected to alternating positive and negative loads, such as earthquakes, with in-plane axial compression acting. In such a member, stirrup, hoop rebar, spiral rebar are aimed at improving the toughness performance of the member by preventing the buckling of the axial rebar after the cover concrete peels off and the internal concrete protruding. Alternatively, reinforcing bars called band reinforcing bars are arranged so as to surround the axial reinforcing bars and the concrete inside them.

  As an effect of constraining concrete, a circular rebar is more effective than a rectangle, so by arranging a combination of multiple circular or spiral rebars, the intermediate rebar can be omitted and the member An interlocking member having a rectangular shape as a whole may be used (see, for example, Patent Document 1).

JP 2000-080646 A

  FIG. 10 is a horizontal sectional view of the interlocking-type member 101. A member 101 shown in FIG. 10 is an example of an interlocking type member in which the entire member is rectangular as described above. In the member 101, a plurality of band bars 105 are arranged so as to surround the axial rebar 103. Further, the plurality of band streaks 105 are arranged in combination.

  In the floor slab, reinforcing bars that resist the main bending (main reinforcing bars) are arranged, and the distribution reinforcing bars are arranged in a direction perpendicular to the reinforcing bars. Generally, the distribution reinforcing bars are arranged on the member surface (outermost edge). For out-of-plane shear forces, shear reinforcing bars are placed in the thickness direction of the member. The shear reinforcing bar is a U-shaped or B-shaped reinforcing bar that surrounds the outermost reinforcing bar (distribution reinforcing bar), or a reinforcing bar that has a hook that is fixed to the outermost reinforcing bar.

  FIG. 11 shows a vertical sectional view of the box culvert 107. FIG. 11A is a cross-sectional view of the entire box culvert 107. FIG. 11B is a cross-sectional view of the portion indicated by G in FIG. 11A, that is, the floor slab 109 of the box culvert 107.

  In the floor slab 109 shown in FIG. 11B, as described above, the main reinforcing bar 111 that resists the main bending is disposed. Further, the power distribution reinforcing bars 113 are arranged at the outermost edge of the member in a direction orthogonal to the main reinforcing bars 111. Further, a shear reinforcing bar 115 having a hook that is fixed to the distribution bar 113 that is the outermost reinforcing bar is disposed.

  In the bar arrangement work, it is preferable not to provide a reinforcing bar joint as much as possible. This is because the joint may become a weak point as a member, and construction and cost related to the joint increase. However, when forming a flat concrete member, if there is a limited head in the work place or if the work space is narrow, the long rebar cannot be used and the number of rebar joints increases. There was also a problem that workability was poor.

  For example, in the interlocking type wall-type pier member 101 as shown in FIG. 10, it is necessary to arrange a plurality of circular strips 105 so as to overlap each other. It was impossible to arrange bars in order from the bottom, and the efficiency of the bar arrangement work was poor. In particular, when a spiral reinforcing bar formed by spirally winding a single reinforcing bar is to be used as a stirrup, it is impossible even to arrange a bar main bar that has been built in advance.

  Also, when building a new structure directly under an existing structure (for example, when building a new structure directly under an existing subway station building), once supporting the load of the existing structure (underpinning), Next, the area around the existing structure and the part that constructs the new structure are excavated and subjected to steps such as earth retaining, formwork installation, bar arrangement, and concrete placement, but excavation around the existing structure is minimal. Because it is necessary to limit it to the limit, the work in the excavated space is a work in a low head and narrow place. In the bar arrangement work in this case, it is impossible to hang the reinforcing bar rods assembled in a bowl shape from the ground at once, and it is necessary to assemble the reinforcing bar rods in the space to be constructed.

The present invention has been made in view of such problems, and its object is to perform bar arrangement work in a short time even in a low head or narrow work space, and sufficient performance with respect to the load. It is to provide a casing capable of exhibiting the above , a connecting structure of the casings , and a method for arranging plates .

According to a first aspect of the present invention for achieving the above-described object, a bar-like member obtained by processing a rod-like member into a polygonal shape or a spiral shape is disposed inside or outside the band, and is rotatably connected to the band. been possess the strands, the strands are arranged at predetermined intervals on the circumference of the girdle muscular, on at least a part of the circumference of the band muscle range where the strands are not provided are formed It is a housing characterized by that.
In addition, the second invention is a combination of housings, wherein a plurality of housings according to the first invention are juxtaposed, and areas where adjacent strands are not provided are overlapped to form a space. Structure. A rod-shaped member may be arranged in the space in parallel with the strand, and the side-by-side housings are formed at one place of the range, and the housings sandwiched between the housings on both sides are The two ranges may be formed.

  Examples of the polygon include a square, a rectangle, and a regular octagon. The strand is disposed at a predetermined position on the circumference. The length of the rod is reduced by making the strand spiral while changing the crossing angle between the band and the strand. Further, the length is extended by returning the strand to a straight line.

According to a third aspect of the present invention, there is a strip formed by processing a rod-shaped member into a circular, polygonal, or spiral shape, and a strand that is disposed inside or outside the strip and is rotatably connected to the strip. have a, the strands are arranged at predetermined intervals on the circumference of the girdle muscular, on at least a part of the circumference of the band muscles, the Kagotai a range in which the strands are not provided is formed A step (a) in which the strand is bent in a spiral shape and arranged in the vicinity of the position where the plate-shaped member is to be formed in a state in which the length is reduced; The step (b) of installing the plate-like member in the planned formation position and extending the casing in a direction orthogonal to the strands while the strands of the adjacent casings are not provided. comprising a step (c), a superposing A reinforcement method of the plate-like member, characterized in Rukoto.

  In the step (c), if necessary, a portion where the strands of the first rod band previously installed are not joined, and a second tube installed adjacent to the first rod is followed. A rod-shaped member parallel to the strands is installed in a space generated by overlapping the bands of the strips of the two casings where the strands are not joined together. The rod-shaped member is a strand, a reinforcing bar or the like.

According to the present invention, even in a low head or narrow work space, the frame can be arranged in a short time, and the frame , the coupling structure of the frame, and the arrangement of the plate-like members can exhibit sufficient performance against the load. A muscle method can be provided.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an elevation view and a cross-sectional view of the housing 1. 1A is an elevation view of the housing 1 in an extended state, FIG. 1B is a cross-sectional view of the housing 1, and FIG. 1C is a housing 1. It is an elevational view in a state where is reduced. FIG. 1B is a cross-sectional view taken along line AA of FIG.

  As shown in FIG. 1A and FIG. 1B, the housing 1 includes a strand 3 that is an axial line and a circular band 5 that is disposed so as to surround the outside of the plurality of strands 3. Etc. The strands 3 are arranged at predetermined intervals on the circumference. In the case 1, ranges 7 where the strands 3 are not arranged are provided at two locations on the circumference.

  The strand 3 is made of a flexible material that does not cause a problem in strength or the like even if it is bent to the same degree or more as the diameter of the band 5. The strand 3 is made of, for example, a twisted PC fiber, a wire rope, or a combination of fibers such as carbon fiber, glass fiber, and aramid fiber. The band 5 is a reinforcing bar, a strand, or the like.

  The intersection of the strand 3 and the band 5 is coupled using a rotary coupling jig (not shown) or the like so that the strand 3 can be rotated about 90 degrees with respect to the band 5. The casing 1 is reduced in length and extended by rotating the strand 3 with respect to the band 5 and changing the crossing angle between the strand 3 and the band 5.

  In order to reduce the housing 1 in the state shown in FIG. 1 (a) as shown in FIG. 1 (c), the strand 3 is bent in the direction of arrow B shown in FIG. 1 (a). To form a spiral and reduce the bar spacing of the band 5. In order to extend the housing 1 in the state shown in FIG. 1 (c) as shown in FIG. 1 (a), the strands 3 are formed in a straight line, and the bar spacing interval of the band 5 is widened. .

  In the first embodiment, the interlocking vertical wall member is arranged using a plurality of housings 1. FIG. 2 is a diagram showing each step of bar arrangement of interlocking wall members. FIG. 2A is an elevation view of the housing 1. 2A is an elevational view of FIG. 1A viewed from the right.

  FIG. 2C is a plan view of the housing 1 and the housing 1a used for the reinforcement of the interlocking wall member. As shown in FIG. 2C, in the first embodiment, two casings 1 and two casings 1a are used for the reinforcement of the wall member. The casing 1a has substantially the same configuration as the casing 1, but the range 7 where the strand 3 is not provided is provided only at one location on the circumference.

  In order to arrange the wall member, first, the casing 1 and the casing 1a in a state in which the strand 3 is bent in a spiral shape and the length thereof is reduced are arranged above the planned position for forming the wall member. Next, the housing 1 and the housing 1a are sequentially built into the member formation scheduled position while extending the strand 3 in a straight line. At this time, as shown in FIG. 2 (c), the range 7 between the adjacent casings 1 and the range 7 of the adjacent casings 1 and the range 7 of the casing 1a are opposed to each other.

  FIG. 2D is a plan view showing a state in which the casing 1 and the casing 1a are overlapped. After building the housing 1 (housing 1a) in the member formation planned position while extending, the housing 1 (housing 1a) is appropriately moved in the direction perpendicular to the strand 3, and FIG. As shown in FIG. 3, the ranges 7 of the band 5 of the adjacent frames 1 and the range 7 of the band 5 of the adjacent frames 1 and the range 7 of the band 5 of the frame 1a are overlapped. In addition, the movement of the housing 1 and the housing 1a for overlapping the range 7 may be performed every time each housing is built or after all the housings are built.

  FIG. 2B is an elevation view of the reinforcement of the interlocking wall member, and FIG. 2E is a horizontal sectional view of the interlocking wall member. FIG. 2B is an elevation view of the bar arrangement of the wall member shown in FIG. After arranging the housing 1 and the housing 1a as shown in FIG. 2 (d), as shown in FIG. 2 (b) and FIG. 2 (e), the adjacent housings 1 It is a rod-shaped member inside the space 9 formed by overlapping the ranges 7 of the band 5 and the range 7 of the band 5 of the adjacent frame 1 and the range 7 of the band 5 of the frame 1a. The reinforcing bar 3a is arranged. The reinforcing bars 3a are arranged in parallel with the strands 3 on the circumference where the strands 3 are arranged.

  In addition, since the reinforcing bar 3a is a member for joining the band 5, the fixing to the footing is unnecessary. Moreover, since it is in the vicinity of the center of the thickness of the member, it does not contribute much to the bending strength. Therefore, it does not have to be one continuous long reinforcing bar, and a short simple reinforcing bar can be used. You may use rod-shaped members, such as strands other than a reinforcing bar.

  After the reinforcing bars 3a are arranged inside the space 9, as shown in FIG. 2E, the formwork 11 is assembled around the reinforcing bars. Then, concrete 13 is placed inside the mold 11 to complete the wall member.

  As described above, in the first embodiment, the interlocking wall member is arranged using the casing 1 and the casing 1a capable of reducing and extending the length. According to the first embodiment, since there is no intermediate band reinforcing bar, the bar arrangement process can be shortened. Moreover, since most of the bar arrangement work can be performed by building the frame 1 and the frame 1a in the member formation planned position while extending, it is possible to improve the efficiency of the bar arrangement work in the field. Furthermore, compared with the case of using a normal reinforcing bar rod, the space provided in the vicinity of the structure for stocking and temporarily placing the rod body is much smaller, so that the work in a narrow field becomes easy.

  In the first embodiment, the wall member, which is a plate member in the vertical direction, has been described. However, the same method can also be applied when arranging the plate members in the horizontal direction. In this case, after extending the frame in the horizontal direction and arranging it within the member formation planned position, it is moved in the direction orthogonal to the strands to overlap the rebars, and the rebar in the space created by overlapping the rebars Insert.

  When the plate-like member is subjected to bending in two directions and the necessary reinforcing bars are also required in the direction of the reinforcing bar, a plurality of frames are juxtaposed using the reinforcing bar arrangement method of the first embodiment. After that, as an additional member, a reinforcing bar in a direction orthogonal to the strand is arranged.

  Further, in the first embodiment, the weld-closed circular band 5 is used as the band 1 of the housing 1, but the band forming the frame may be spiral. Furthermore, the processing shape of the band is not limited to a circle, and the strands only need to be arranged on the circumference.

  FIG. 3 is a diagram illustrating an example of a frame using a strip that has been processed into a polygonal shape. 3 (a) and 3 (b) show an example of a housing 21 using a band 25 processed into a square. A housing 21 shown in FIG. 3A is composed of a strand 23, a stirrup 25, and the like.

  The strands 23 and the strips 25 of the casing 21 correspond to the strands 3 and the strips 5 of the casing 1, respectively. A dotted line 27 indicates a diameter at which the strand 23 is spiral when the housing 21 is contracted. The strands 23 are arranged on the circumference indicated by the dotted line 27. The strand 23 is arranged at the center of one side of the band 25. The girdle 25 is disposed so as to surround the outside of the plurality of strands 23.

  Even when the housing 21 is used, the interlocking wall member can be arranged by the same method as in the first embodiment. When the case 21 is used, as shown in FIG. 3B, a part of the band 25 of the adjacent case 21 (a portion where the strand 23 is not disposed) is overlapped. And the reinforcing bar 23a which is a rod-shaped member is arrange | positioned in the space 29 produced by superimposing the band 25. FIG. The reinforcing bars 23a are arranged at the corners of the band 25 after overlapping.

  3 (c) and FIG. 3 (d) show an example of the frame 31 using the strip 35 processed into a rectangle. A housing 31 shown in FIG. 3C includes a strand 33, a band 35, and the like.

  The strands 33 and the strips 35 of the casing 31 correspond to the strands 3 and the strips 5 of the casing 1, respectively. A dotted line 37 indicates a diameter at which the strand 33 is spiral when the casing 31 is contracted. The strands 33 are arranged on the circumference indicated by the dotted line 37. The band 35 is arranged so as to surround the outside of the plurality of strands 33. In addition, in the housing 31, the gap between the strand 33 and the band 35 is not constant.

  Even when the housing 31 is used, the interlocking wall member can be arranged in the same manner as in the first embodiment. When the housing 31 is used, as shown in FIG. 3D, a part of the band 35 of the adjacent housing 31 (portion where the strand 33 is not disposed) is overlapped. And the reinforcing bar 33a which is a rod-shaped member is arrange | positioned in the space 39 produced by superimposing the band 35. FIG.

  3 (e) and FIG. 3 (f) show an example of a frame 41 using a strip 45 processed into a regular octagon. A housing 41 shown in FIG. 3 (e) includes a strand 43, a band 45, and the like.

  The strands 43 and the strips 45 of the casing 41 correspond to the strands 3 and the strips 5 of the casing 1, respectively. A dotted line 47 indicates a diameter at which the strand 43 is spiral when the casing 41 is contracted. The strands 43 are arranged on the circumference indicated by the dotted line 47. The strand 43 is arranged at the center of one side of the band 45. The band 45 is arranged so as to surround the outside of the plurality of strands 43.

  Even when the housing 41 is used, the interlocking wall member can be arranged by the same method as in the first embodiment. When the frame 41 is used, as shown in FIG. 3F, a part of the band 45 of the adjacent frame 41 (a portion where the strand 43 is not disposed) is overlapped. And the reinforcing bar 43a which is a rod-shaped member is arrange | positioned in the space 49 produced by superimposing the band 45. FIG.

  Also in the case of using the casing 21, the casing 31, and the casing 41 as shown in FIG. 3, since there is no intermediate band reinforcing bar, the bar arrangement process can be shortened. Moreover, since most of the bar arrangement work can be performed by building it in the member formation scheduled position while extending the frame, the efficiency of the bar arrangement work on site can be improved. Furthermore, compared with the case of using a normal reinforcing bar rod, the space provided in the vicinity of the structure for stocking and temporarily placing the rod body is much smaller, so that the work in a narrow field becomes easy.

  The polygonal strip 35, the strip 45, and the strip 55 as shown in FIG. 3 are slightly easier to bend than the circular strip 5, but the restraining effect on the internal concrete placed after the placement is as follows. This is almost the same as when the circular strip 5 is used.

  Next, a second embodiment will be described. FIG. 4 shows an elevational view of the housing 51. 4A is an elevation view with the housing 51 extended, and FIG. 4B is an elevation view with the housing 51 contracted.

  As shown in FIG. 4A, the housing 51 includes a strand 53 that is an axial line, a band line 55 that is disposed so as to surround the outside of the plurality of strands 53, and the like. The strands 53 are arranged at predetermined intervals on the circumference. The band 55 is arranged so as to surround the strand 53. The strands 53 and the strips 55 are made of the same material as the strands 3 and the strips 5 of the casing 1 of the first embodiment.

  The intersection of the strand 53 and the band 55 is coupled using a rotary coupling jig (not shown) or the like so that the strand 53 can rotate about 90 degrees with respect to the band 55. The casing 51 is reduced in length and extended by rotating the strand 53 with respect to the band 55 and changing the crossing angle between the strand 53 and the band 55.

  To reduce the casing 51 in the state shown in FIG. 4 (a) as shown in FIG. 4 (b), the strand 53 is bent in the direction of arrow C shown in FIG. 4 (a). To form a spiral shape, and the interval between the reinforcing bars 55 is shortened. In order to extend the housing 51 in the state shown in FIG. 4B as shown in FIG. 4A, the strands 53 are straightened to widen the bar spacing interval of the strips 55. .

  FIG. 5 is a vertical cross-sectional view of the existing structure 57 and the new structure 59 constructed therebelow. In the third embodiment, as shown in FIG. 5, when a new structure 59 is constructed directly under an existing structure 57 such as a subway station building, the floor slab 61 is arranged using a plurality of housings 51. A method for performing streaks will be described. FIG. 6 is a diagram showing each step of the bar arrangement of the floor slab 61.

  6A is a plan view of the floor slab 61 during reinforcement, and FIG. 6B is a plan view of the floor slab 61 after reinforcement. In order to arrange the floor slab 61, first, the frame 51a is contracted and placed in the planned formation position of the floor board 61, and the strand 53 is extended in a straight line. Next, in a state where the casing 51b is contracted, the casing 51b is arranged next to the casing 51a, and the strands 53 are linearly extended. Similarly, the casing 51c, the casing 51d, and the casing 51e are sequentially arranged, and the strands 53 are linearly extended as indicated by arrows D, E, and F.

  As shown in FIG. 6B, in order to juxtapose the plurality of housings 51 without gaps, the housings are extended as necessary, after each housing is extended, or after all the housings are extended. 51 is moved in a direction orthogonal to the strand 53.

  FIG. 6C shows a vertical sectional view of the floor slab 61. After arranging a plurality of housings 51 as shown in FIG. 6 (b), as shown in FIG. 6 (c), floors are added as additional members so as to surround the outer periphery of the plurality of housings 51. Reinforcing steel members 57 are arranged on the lower edge side and the upper edge side of the plate 61. Then, the mold 59 is assembled around the reinforcing steel material 57, and the concrete 61 is placed inside the mold 59 to complete the floor slab 61.

  As described above, in the second embodiment, the floor slab 61 is arranged using the frame 51 capable of reducing and extending the length. According to the second embodiment, since most of the bar arrangement work can be performed by building the frame 51 in the member formation planned position while extending, the efficiency of the bar arrangement work at the site can be improved. Furthermore, compared with the case of using a normal reinforcing bar rod, the space provided in the vicinity of the structure for stocking and temporarily placing the rod body is much smaller, so that the work in a narrow field becomes easy.

  FIG. 7 is a diagram showing a fixing method for both ends of the casing 51. 7A shows a state before the casing 51 is completely extended, and FIG. 7B shows a state where the casing 31 is fully extended. In the second embodiment, when the floor slab 61 of the new structure 59 is formed, as shown in FIG. 7A, the central portion 56 of the strand 53 is spiral, and both side portions 54 are linear. In this state, the casing 51 is placed at a predetermined position while being slid or rolled, and then, as shown in FIG. 7B, the central portion 56 of the strand 53 is extended to completely extend the casing 51. By fixing the end portion 66 of the strand 53 to the inside of the vertical reinforcing bar 64 of the wall 58, it becomes more structurally advantageous. A spacer 62 is installed between the formwork such as the lower formwork 60 and the housing 51.

  In the second embodiment, the reinforcing steel material 57 is disposed after the plurality of housings 51 are disposed. However, the reinforcing steel material 57 on the lower edge side of the floor slab 61 is disposed before the plurality of housings 51 are disposed. You may keep it. The reinforcing steel material 57 that is an additional member may not be arranged or may be arranged inside the plurality of casings 51.

  In the second embodiment, the floor slab which is a plate member in the horizontal direction has been described, but the same method can also be applied when arranging the plate members in the vertical direction. In this case, the casings are extended in the vertical direction and arranged in the member formation planned position, and then moved in a direction orthogonal to the strands as necessary to narrow the interval between the casings. Furthermore, a reinforcing bar or the like is disposed outside or inside the housing as necessary.

  In addition, in the case 51 of the second embodiment, the weld-closed circular band 55 is used, but the band forming the case has a spiral shape or a polygonal shape as shown in FIG. There is also a case. Also in the second embodiment, the housing may be wrapped as shown in FIG. 2 of the first embodiment. Furthermore, as shown by the dotted line in FIG. 6 (b), a function as a two-way version can be added by arranging a reinforcing bar or the like by penetrating the housing 51 from the front or back as the reinforcing bar 52. .

  In the first and second embodiments, the case where the streaks are arranged outside the strands is used, but the case where the streaks are arranged inside the strands may be used. FIG. 8 shows an example of a frame in which a band is arranged inside the strand.

  FIG. 8A is a plan view of a housing 63a in which a square band 67a is disposed inside the strand 65a. A dotted line 69 indicates a diameter at which the strand 65a is spiral when the casing 63a is contracted. The strands 65a are arranged on a circumference indicated by a dotted line 69. Moreover, the strand 65a is arrange | positioned on the outer side of the corner part of the band 67a. That is, the band 67a is disposed inside the plurality of strands 65a.

  FIG. 8B is a plan view of a casing 63b in which a rectangular band 67b is disposed inside the strand 65b. A dotted line 69 indicates a diameter at which the strand 65b is helical when the casing 63b is contracted. The strands 65b are arranged on the circumference indicated by the dotted line 69. Moreover, the strand 65b is arrange | positioned on the outer side of the corner part of the band 67b. That is, the band 67b is disposed inside the plurality of strands 65b.

  FIG. 8C is a plan view of a housing 63c in which a regular octagonal strip 67c is disposed inside the strand 65c. A dotted line 69 indicates a diameter at which the strand 65c is spiral when the casing 63c is contracted. The strands 65c are arranged on the circumference indicated by the dotted line 69. Moreover, the strand 65c is arrange | positioned on the outer side of the corner part of the band 67c. That is, the band 67c is disposed inside the plurality of strands 65c.

  FIG. 9 shows an example of bar arrangement of a plate-shaped member in the case where the casing 63b shown in FIG. 8 is used in the second embodiment. The (a) figure of FIG. 9 shows the bar arrangement example which uses the strand 65b as a main reinforcement. In FIG. 9A, a plurality of casings 63b are scheduled to be formed as plate-like members in the same manner as in the case where the casing 51 is disposed within the planned formation position of the floor slab 61 in the second embodiment. Place in position. At this time, the extended housing 63b is moved in a direction perpendicular to the strand 65b, and the dotted line 69 (the diameter at which the strand 65b is helical when the housing 63b is reduced) overlaps the interval between the adjacent housings 63b. It is desirable to narrow to a certain extent.

  Then, after arranging the plurality of housings 63b, the distribution reinforcing bars 79a and 79b that are additional members are arranged outside the strand 65b so as to surround the plurality of housings 63b. The strand 65b serves as a main bar. The band 67c plays a role of reducing the casing 63b, and becomes a shear reinforcement bar after the extension of the casing 63b.

  When FIG. 9A is an example of horizontal plate-like member reinforcement, the reinforcing bar 79b on the lower edge side of the plate-like member is arranged before arranging the plurality of housings 63b. May be.

  FIG. 9B shows a bar arrangement example in which the strand 65b is a reinforcing bar. In FIG. 9B, a plurality of casings 63b are to be formed as plate-like members in the same manner as in the second embodiment when the casing 51 is disposed within the planned formation position of the floor slab 61. Place in position. At this time, the extended housing 63b is moved in a direction perpendicular to the strand 65b, and the dotted line 69 (the diameter at which the strand 65b is helical when the housing 63b is reduced) overlaps the interval between the adjacent housings 63b. It is desirable to narrow to a certain extent.

  Then, after arranging the plurality of casings 63b, the reinforcing bars 81a and the reinforcing bars 81b, which are additional members, are arranged inside the strand 65b so as to penetrate the plurality of casings 63b. The reinforcing bar 81a and the reinforcing bar 81b are main bars. The strand 65b serves as a distribution reinforcing bar. The band 67c plays a role of reducing the casing 63b, and becomes a shear reinforcement bar after the extension of the casing 63b.

  In the reinforcement of a plate-shaped member using a plurality of extendable frame bodies, when the strand is the main reinforcing bar, the strength of the strand is stronger than the normal reinforcing bar. It is possible to reduce muscle mass.

  If the steel arrangement perpendicular to the main reinforcing bar is not required for calculation, the strip of the rod will be distributed in the tensile stress generated in the main reinforcing bar, prevent the main reinforcing bar from buckling, and split cracks along the main reinforcing bar. It plays a role as a distributed reinforcing bar for preventing or protecting the main reinforcing bar.

  There is also a member in which the flat plate is subjected to bending in two directions, and a reinforcing bar necessary for calculation is also required in the direction of the reinforcing bar. At this time, in the case where the proof strength is insufficient with only the continuous reinforcing bars by overlapping, a reinforcing steel material is separately arranged.

  As described above, the preferred embodiments of the casing, the plate member arranging method, and the plate member according to the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

Elevated view and cross-sectional view of housing 1 The figure which shows each process of reinforcement of the wall member of an interlocking system The figure which shows the example of the frame using the strip which was processed into polygonal shape Elevated view of housing 51 Vertical sectional view of the existing structure 57 and the new structure 59 constructed therebelow The figure which shows each process of the bar arrangement of the floor slab 61 The figure which shows the fixing method of the both ends of the housing 51 An example of a rod with a streak inside the strand Example of bar arrangement of plate-like member in case of using the casing 63b shown in FIG. Horizontal sectional view of interlocking member 101 Vertical sectional view of box culvert 107

Explanation of symbols

1, 1a, 21, 31, 41, 51, 51a, 51b, 51c, 51d, 51e, 63a, 63b, 63c ......... Housing 3, 23, 33, 43, 53, 65a, 65b, 65c ......... Strands 3a, 3b, 23a, 33a, 43a, 81a, 81b ......... reinforcing bars 5, 25, 35, 45, 55, 67a, 67b, 67c ......... bands 7 ......... ranges 9, 29, 39, 49 ……… Space 57 ……… Steel Reinforced Steel 61 ……… Slabs 79a, 79b ……… Distributed Rebar

Claims (6)

A hoop formed by processing a bar-like member into polygonal or spirally arranged inside or outside of the band muscle, possess a strand that is rotatably coupled to said girdle muscular,
The said strand is arrange | positioned by the predetermined space | interval on the circumference of the said strip, and the range in which the said strand is not provided is formed in at least one part on the circumference of the said strip. . 2. A connecting structure for housings, wherein a plurality of housings according to claim 1 are juxtaposed, and areas where adjacent strands of strands are not provided are overlapped to form a space. The rod-like member coupling structure according to claim 2, wherein a rod-like member is disposed in the space in parallel with the strand. The juxtaposed two-sided housing is formed with one of the ranges, and the housing sandwiched between the two-sided housings is formed with two of the ranges. Item 4. A bonded structure of a casing according to Item 3. The rod-like member circular, polygonal, or a hoop that is processed into a spiral shape, is arranged inside or outside of the band muscle, possess a strand that is rotatably coupled to said girdle muscular, the strands Are arranged at predetermined intervals on the circumference of the band, and at least a part of the circumference of the band is formed with a housing in which a range in which the strand is not provided is formed , and the strand is spirally formed. A step (a) of arranging the plate-like member in the vicinity of the planned formation position with the length reduced by bending to
(B) installing the casing within the plate-shaped member formation planned position while extending the length of the casing by making the strands linear.
A step (c) of moving the casing in a direction orthogonal to the strands and superimposing a range where the strands of the adjacent casings are not provided;
A method for arranging a plate-like member, comprising:   In the step (c), a portion where the strands of the band of the first casing previously installed are not joined, and a second collar installed downstream and adjacent to the first casing. 6. A plate-shaped member according to claim 5, wherein a bar-shaped member parallel to the strand is installed in a space formed by overlapping the strands of the body band that are not joined together and overlapping the band bars. Reinforcement method.

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