JP2006177139A - Post fall and rotation preventing structure in sound insulating wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a post fall and rotation preventing structure in a sound insulating wall reducible in cost and labor based on shortening of a construction period by easily taking a countermeasure to prevent post rotation even to an existing sound insulating wall, not to mention a new sound insulating wall. <P>SOLUTION: A mounting bracket 9 for fixing a wire rope 8 for preventing post rotation, to each post 2 is fastened and fixed to each post 2 by bolts-nuts 12, and a slit 9c for mounting the wire rope 8 for preventing post rotation is formed in the mounting bracket 9. A blocking plate 92 for blocking the opening of the slit 9c can be fastened and fixed to the mounting bracket 9 by bolts-nuts 18. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure for preventing a column from falling and rotating in a sound insulation wall installed along a highway or the like.

  Some of the sound insulation walls that are installed along the expressway have measures to prevent them from falling, so that the struts that are torn down due to collision accidents, etc. fall under the overpass and do not cause secondary disasters (see Patent Document 1). .)

  That is, as shown in FIG. 17, the base plate 102 is fixed to the lower end of the column 100 made of H-shaped steel in an inverted T shape in a state of projecting in the longitudinal direction of both flanges 101 of the H-shaped steel, By fixing the protruding portions at both ends of the base plate 102 to the upper portion of the rail 104 with a plurality of anchor bolts and nuts 103, 103, the columns 100 are erected at predetermined intervals along the longitudinal direction of the rail 104. In addition, a through hole 107 through which the support rope dropping wire rope 106 is inserted is formed at the lower end portion of the web 105 arranged in a state orthogonal to the longitudinal direction of the rail 104 in the H-shaped steel, and is formed at every constant span. The support rope fall-prevention wire rope 106 is inserted into the through hole 107 of the support pillar 100 arranged in the span, and both ends thereof are fixed. Thus, even if the support column 100 is knocked down from the road rail 104 due to a rear-end collision of the vehicle, the wire rope 106 is supported to prevent it from falling below the overpass, thereby developing a secondary disaster. It comes to prevent.

Even if the strut fall prevention measures as described above are taken, since the wire rope 106 is passed through the lower portion of the strut 104, the strut 100 rotates around the wire rope 106 when a collision accident occurs. There is a possibility that the upper part of 100 may hang down. And at the intersection of the elevated road and the like, there is little difference in height from the lower elevated road, so when the suspended column 100 rotates to the road side, the column 100 is moved to a vehicle traveling in another lane. There is a risk of secondary disasters such as hitting and colliding. Therefore, there is a structure in which a support rotation prevention device is also configured at the upper end of the support 100 through a wire rope for rotation prevention.
Japanese Patent Application No. 2003-360926

  However, in the above-described conventional example, since the attachment was performed by inserting the wire rope for preventing the rotation of the support through the insertion hole formed at the upper end of each support, the wire rope having a long one span is inserted one by one. The work to be done requires a lot of labor and time, and therefore it takes a lot of time, effort and cost not only to install on new and existing sound insulation walls, but also to repair work after an accident. was there.

  The present invention has been made paying attention to the problems of the above-described conventional example, and it is possible to easily take measures for preventing the rotation of the support column not only for the new sound insulation wall but also for the existing sound insulation wall. It is an object of the present invention to provide a structure for preventing a column from falling and rotating in a sound insulating wall that can reduce costs and labor by shortening the length of the sound.

  In order to achieve the above-described object, the structure for preventing the column from falling and rotating in the sound insulation wall according to claim 1 of the present invention is a structure in which the column is dropped at the lower end of a plurality of columns for supporting the sound insulation plate standing on the railing on the elevated road. A wire rope for prevention is attached, both end portions of the wire rope for preventing the column drop are fixed to the handrail, a wire rope for preventing the rotation of the column is attached to the upper ends of the plurality of columns, and the wire for preventing the rotation of the column Both ends of the rope are strut fall and rotation prevention structure in the sound insulation wall fixed to the strut,

  A bracket for fixing the support rotation preventing wire rope to each support is fastened and fixed to each support by a bolt and a nut, and the bracket is formed with a recess capable of mounting the support rotation preventing wire rope. The closing plate that closes the opening of the recess is configured to be fastened and fixed to the bracket by bolts and nuts.

  The structure for preventing the column from falling and rotating in the sound insulation wall according to claim 2 is the structure for preventing the column from falling and rotating in the sound insulation wall according to claim 1, wherein the wire rope for preventing the rotation of the column between the two adjacent columns is closed. Is detachably attached to the both closing plates fastened and fixed to the both struts.

  The structure for preventing and rotating the struts in the sound insulating wall according to claim 3 is the structure for preventing and rotating the struts in the sound insulating wall according to claim 1 or 2, wherein each of the brackets for fixing the wire ropes for preventing the falling of the struts to the respective struts is provided. The bracket is fastened and fixed with bolts and nuts, and the bracket is formed with a recess to which the wire rope for preventing the column from falling can be attached, and a closing plate for closing the opening of the recess is bolted to the bracket. The means is characterized in that it can be fastened and fixed by a nut.

  5. The structure for preventing a column from falling and rotating in a sound insulating wall according to claim 4, wherein the structure for preventing a column from falling and rotating in a sound insulating wall according to claim 4 closes the wire rope for preventing the column from falling between the two adjacent columns. Is detachably attached to the both closing plates fastened and fixed to the both struts.

  In the structure for preventing the column from falling and rotating in the sound insulation wall according to the first aspect of the invention, as described above, the bracket for fixing the wire rope for preventing the rotation of the column to each column is fastened and fixed to each column by a bolt and a nut. A recess that can be fitted with a wire rope for preventing the rotation of the column is formed in the door, and a closing plate that closes the opening of the recess is configured to be fastened and fixed to the bracket with bolts and nuts. When attaching a wire rope for preventing the rotation of the support, first fix the bracket to the upper end of each support with bolts and nuts, and then attach the wire rope for preventing the rotation of the support to the recess formed in each bracket. With the closure plate fastened to the bracket with bolts and nuts, the opening of the recess is closed. A state of post rotation preventing wire ropes at the upper end portion is connected and fixed to each post.

  Therefore, it is possible to easily take measures to prevent the rotation of the struts for the existing sound insulation wall as well as for the new sound insulation wall. This makes it possible to reduce costs and labor by shortening the construction period. .

  In the structure for preventing the column from falling and rotating in the sound insulation wall according to claim 2, as described above, the cover for closing the wire rope for preventing the rotation of the column between the two columns adjacent to each other is fixed to both the blocking plates fastened to both columns. By adopting a structure that is detachably attached, both the blocking plates can be effectively used as the cover attaching portion, and the appearance can be improved by concealing the wire rope for preventing the rotation of the column exposed on the road side.

  In the structure for preventing the column from falling and rotating in the sound insulation wall according to claim 3, as described above, the bracket for fixing the column drop preventing wire rope to each column is fastened and fixed to each column by bolts and nuts. A recess that can be attached to the wire rope for preventing the column from falling is formed, and a closing plate that closes the opening of the recess is configured to be fastened and fixed to the bracket by a bolt and a nut. When attaching the support rope fall prevention wire rope, first fix the bracket to the lower end of each support with bolts and nuts, and then attach the support rope fall prevention wire rope to the recess formed in each bracket. In the mounted state, the closure plate is fastened and fixed to the bracket with bolts and nuts to close the openings of the recesses. A state of post fall-prevention wire rope to the lower end portion is connected and fixed pillars.

  Therefore, it is possible to easily take measures to prevent the column from falling, not only to the new sound insulation wall but also to the existing sound insulation wall, which makes it possible to reduce costs and labor by shortening the construction period. .

  In the structure for preventing the column from falling and rotating in the sound insulation wall according to claim 4, as described above, the cover for closing the wire rope for preventing the column from falling between the two adjacent columns is fixed to both the blocking plates fastened to both columns. By adopting a structure that is detachably attached, both the blocking plates can be effectively used as the cover attaching portion, and the appearance can be improved by concealing the wire rope for preventing the column drop exposed on the road side.

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

  The structure for preventing the column from falling and rotating in the sound insulation wall according to the first embodiment corresponds to the first and second aspects of the invention.

  First, the structure of the first embodiment will be described with reference to the drawings.

  1 is a front view showing a structure for preventing a column from falling and rotating in a sound insulation wall of Example 1, FIG. 2 is a longitudinal side view thereof, FIG. 3 is a detailed view of a portion A in FIG. 1, and FIG. 4 is a detailed view of a portion B in FIG. 5 is a detailed view of part C of FIG. 1, FIG. 6 is a detailed view of part D of FIG. 1, FIG. 7 is a detailed view of part E of FIG. 1, and in these figures, 1 stands along the edge of the highway. The installed rail, 2 is a column erected at a predetermined interval with respect to the column, 3 is a sound insulating plate, 4 is a wire rope for preventing the column from falling, 5 is a bracket for mounting the wire rope for preventing the column from dropping, 6 Is a bracket for attaching a wrap portion of a wire rope for preventing a column drop, 7 is a bracket for fixing an end of a wire rope for preventing a column drop, 8 is a wire rope for preventing a column rotation, and 9 is a bracket for attaching a wire rope for preventing a column rotation. 10 is a bracket for fixing the end of the wire rope for preventing the rotation of the column. It is.

  More specifically, the column 2 is made of H-shaped steel, and its lower end is fixed to the rail 1 so that the columns 2 and 2 are spaced at a predetermined interval along the longitudinal direction of the rail 1.・ ・ Established.

  The sound insulating plate 3 is mounted in a state in which both end edges of the sound insulating plate 3 are inserted into a groove formed between the flanges 2a and 2b of the H-shaped steel in the adjacent struts 2-2. In addition, since this sound insulation board 3 is high in height, for example, it piles up in four steps and secures arbitrary height.

  The above-mentioned support rope dropping wire rope 4 does not drop any of the support pillars 2, 2... Standing up with an interval of, for example, 2 m with respect to the sound insulation wall length of several hundred m to several km. The length is divided into a plurality of parts, for example, one span is set to 100 m to prevent the dropping of the corresponding struts 2, 2... And has a length of 100 m + α. ing.

  And this support | pillar fall prevention wire rope 4 is attached and fixed to the roadway side flange 2b of all the support | pillars 2 and 2 except the support | pillars 2 and 2 of 1 span both ends with the volt | bolt nut. Mounting bracket 5, wrap portion mounting bracket 6 fixed by bolts and nuts 11 to the roadway side flange 2 b at the lower end of the support 2 at both ends of one span, and bolts to the rail 1 A plurality of support columns 2, 2... Are attached over the entire length of the lower end portions of the support columns 2, 2.

  As shown in FIGS. 3 and 8 (exploded perspective view), the mounting bracket 5 has a mounting plate portion 5b erected at the center portion of the substrate portion 5a fixed to the support column 2, and the mounting plate portion. A bracket body 51 having a slit (recessed portion) 5c having a substantially U-shaped cross-section in which the support rope dropping prevention wire rope 4 can be attached to the tip edge of 5b, and a closing plate for closing the opening of the slit 5c 52. Bolt insertion holes 52a and 5d are formed in the mounting plate portion 5b and the closing plate 52, respectively.

  As shown in FIGS. 4 and 9 (exploded perspective view), the wrap portion mounting bracket 6 has a mounting plate portion 6b erected at the center portion of the substrate portion 6a fixed to the column 2, A bracket body 61 in which two slits (concave portions) 6c having a substantially U-shaped cross-section capable of mounting the two support wire drop prevention wire ropes 4, 4 are formed at the front edge of the plate portion 6b, and the slit 6c. , 6c and a closing plate 62 that closes the opening, and the mounting plate portion 6b and the closing plate 62 are formed with bolt insertion holes 62a and 6d, respectively.

  As shown in FIGS. 5 and 10 (disassembled perspective view), the end fixing bracket 7 has a mounting plate portion 7b erected at the center portion of the substrate portion 7a fixed to the handrail 1, The plate portion 7b has a structure in which bolt holes 7c through which fastening bolts 13 provided at both ends of the support rope fall prevention wire rope 4 can be inserted are formed.

  As shown in FIG. 6, the wire ropes 8 for preventing the rotation of the columns are bolts and nuts with respect to the roadway side flanges 2b at the upper ends of all the columns 2, 2 except the columns 2, 2 at both ends of one span. A plurality of mounting brackets 9 are fixed by bolts and nuts 12 and are fixed to the roadway side flanges 2b at the upper ends of the support columns 2 and 2 at both ends of one span. Are attached over the entire length of the upper ends of the columns 2, 2,.

  As shown in FIGS. 7 and 11 (exploded perspective view), the mounting bracket 9 has a mounting plate portion 9b erected on one side edge portion of the substrate portion 9a fixed to the support column 2, and the mounting bracket 9 A bracket main body 91 in which a slit (concave portion) 9c having a substantially U-shaped cross section capable of mounting the support rope rotation preventing wire rope 8 is formed at the front end edge of the plate portion 9b, and the opening of the slit 9c are closed. The mounting plate portion 9b and the closing plate 92 are respectively formed with bolt insertion holes 92a and 9d.

  As shown in FIGS. 3 and 12 (disassembled perspective views), the end fixing bracket 10 has a mounting plate portion 10b erected on one side edge portion of the substrate portion 10a fixed to the support column 2. The mounting plate 10b has a structure in which bolt holes 10c through which fastening bolts 14 provided at both ends of the support rope rotation preventing wire ropes 8 and 8 can be inserted are formed in two places.

  Next, operations and effects of the first embodiment will be described.

  Since the structure for preventing a column from dropping and rotating in the sound insulation wall according to the first embodiment is configured as described above, in order to attach the wire rope 4 for preventing the pillar from falling to the sound insulation wall, as shown in FIG. The bracket body 51 of the mounting bracket 5 is attached and fixed to the roadway side flange 2b at the lower end of all the columns 2, 2. The bracket body 61 of the bracket 6 for attaching the lap portion is fixed to the roadway side flange 2b at the lower end of the support columns 2 and 2 by bolts and nuts 11, and the end is fixed to the rail 1 by bolts and nuts 11 The bracket 7 is attached and fixed.

  Next, the support wire dropping rope 4 arranged along the sound insulation wall of one span is attached to the slits 5c, 5c,... In all the mounting brackets 5, 5,. By attaching at 15, the opening of the slit 5c is closed.

  In addition, the end side of the support rope drop prevention wire rope 4 is attached to one slit 6c of each of the wrap part mounting brackets 6 and 6, and the other one span side support pole drop prevention wire rope 4 of the adjacent one span side is attached. The opening of the slits 6c and 6c is closed by attaching the closing plate 62 with the bolts and nuts 16 with the end side attached to the other slit 6c.

  Finally, the fastening bolts 13 provided at both ends of the support rope drop prevention wire rope 4 are inserted into the bolt holes 7c in the end fixing bracket 7, and nuts 17 are screwed into the fastening bolts 13 to be fastened. Thus, both ends of the support rope fall prevention wire rope 4 are fixed to the rail 1 and the support rope fall prevention wire rope 4 is tightened by screwing the nut 17 into the tension rope fall prevention wire rope 4. Complete the installation.

  Further, in order to attach the support rope rotation prevention wire rope 8 to the sound insulation wall, bolts and nuts 12 are provided on the roadway side flanges 2b at the upper ends of all the supports 2, 2,. The bracket main body portion 91 of the mounting bracket 9 is fixed and attached, and the end mounting bracket 10 is fixed by bolts and nuts 12 to the roadway side flanges 2b of the upper ends of the columns 2 and 2 at both ends of one span. To do.

  Next, the support wire rotation preventing wire rope 8 disposed along the sound insulation wall of one span is mounted on the slits 9c, 9c,... In all the mounting brackets 9, 9,. By attaching at 18, the opening of the slit 9c is closed.

  Finally, the fastening bolts 14 provided at both ends of the support column rotation preventing wire rope 8 are inserted into the bolt holes 7c in the end fixing bracket 7, and the nuts 19 are screwed into the fastening bolts 14 to be fastened. As a result, both ends of the support strut rotation preventing wire rope 8 are fixed to the struts 2 at both ends, and the nut 19 is screwed in so that the support strut rotation preventing wire rope 8 is tightly stretched. The installation of the support rope rotation preventing wire rope 8 is completed.

  As described above in detail, according to the support column falling and rotation preventing structure on the sound insulating wall of the first embodiment, the mounting bracket 9 for fixing the support rotation preventing wire rope 8 to each support column 2 is attached to each support column 2. The mounting bracket 9 is fixed by bolts and nuts 12, and a slit 9c is formed on the mounting bracket 9 to which the wire rope 8 for preventing the rotation of the column can be mounted. A closing plate 92 that closes the opening of the slit 9c is formed by the mounting bracket. 9 can be fastened with bolts and nuts 18 so that it can easily take measures to prevent the rotation of the struts, not only for the new sound insulation wall but also for the existing sound insulation wall. As a result, the cost can be reduced and the labor can be reduced.

  In addition, a mounting bracket 5 for fixing the support rope fall prevention wire rope 4 to each support pole 2 is fastened and fixed to each support pole 2 by bolts and nuts 11. A possible slit 5c is formed, and the closing plate 52 that closes the opening of the slit 5c is configured to be fastened and fixed to the mounting bracket 5 by bolts and nuts 15. It is possible to easily take measures to prevent the column from falling even for existing sound insulation walls, and this makes it possible to reduce costs and labor by shortening the construction period.

  Next, another embodiment will be described. In the description of the other embodiments, the same components as those of the first embodiment are not shown, or the same reference numerals are given and the description thereof is omitted, and only the differences are described.

  The second embodiment shows a modification of the mounting bracket 5 in the first embodiment. FIG. 13 is a front view showing a structure for preventing the column from falling and rotating in the sound insulation wall of the second embodiment, and FIG. FIG. 15 is a sectional view taken along the line GG of FIG. 14, and FIG. 16 is an exploded perspective view of the mounting bracket.

The mounting bracket 20 according to the second embodiment includes a bracket body 21 and a closing plate 22.
The bracket main body 21 has a substantially U-shaped cross section having a recess 21c with a base plate 21a fixed to the column 2 and side walls 21b and 21b bent at right angles from both side edges of the base plate 21a. The board insertion part 23 is formed with bolt insertion holes 23 at two places.

  The closing plate 22 serves to close the concave portion 21c of the bracket body portion 21, and includes a top plate portion 22a and side walls 22b and 22b bent at right angles from both side edges of the top plate portion 22a. The cross section is formed in a substantially U shape.

  The board portion 21 includes bolt insertion holes 25 for fastening the side walls 21b, 22b to each other with the bolts and nuts 24 on the side walls 21b, 21b of the bracket body 21 and the side walls 22b, 22b of the closing plate 22. Are formed in two places.

  Further, the top plate 22a of the closing plate 22 is formed with bolt insertion holes 22c for attaching the covers 26 for closing the wire ropes 4 for preventing the column drop between the adjacent columns 2-2. .

  Since the structure for preventing the column from falling and rotating in the sound insulation wall according to the second embodiment is configured as described above, first, the bracket main body portion is formed by the one-side bolt 27 with respect to the roadway side flange 2b at the lower end portion of the columns 2, 2,. The bracket 20 for attachment is attached and fixed by fastening 21a.

  Next, the support rope dropping wire rope 4 disposed along the sound insulation wall of one span is mounted in the recesses 21c in all the mounting brackets 20, and the closing plate 22 is mounted with bolts and nuts 24 for mounting. The recess 21c of the bracket 20 is closed.

  Then, the cover 26 is covered with the support rope fall prevention wire rope 4 between the two supports 2-2 adjacent to each other, and both ends of the cover 26 are fixed to the top plate portion 22a of the closing plate 22 with the one-side bolts 28. Then, the cover 26 is attached.

  As described above in detail, in the structure for preventing the column from falling and rotating in the sound insulation wall according to the second embodiment, as in the case of the first embodiment, the structure can be easily dropped not only on a new sound insulation wall but also on an existing sound insulation wall. In addition to being able to reduce costs and labor by shortening the construction period, it is possible to take preventive measures, and in addition, struts fall between both struts 2-2 adjacent to each other. The cover 26 that closes the wire rope 4 for prevention is detachably attached to the two closing plates 22 fastened and fixed to the two columns 2 and 2 so that both the closing plates 22 are effective as cover attaching portions. It is possible to obtain an additional effect of improving the appearance by hiding the wire rope 4 for preventing the column from falling on the road side.

Although the embodiments have been described with reference to the drawings, the specific configuration is not limited to the first embodiment.
For example, in the second embodiment, the mounting bracket 20 and the cover 26 are applied to prevent the column from falling, but it can also be applied to prevent the column from rotating.

It is a front view which shows the support | pillar fall and rotation prevention structure in the sound insulation wall of Example 1. FIG. It is a vertical side view which shows the support | pillar fall and rotation prevention structure in the sound insulation wall of Example 1. FIG. FIG. 2 is a detailed view of part A in FIG. 1. It is the B section detailed drawing of FIG. FIG. 2 is a detailed view of part C in FIG. 1. FIG. 2 is a detailed view of a D part in FIG. 1. It is the E section detailed drawing of FIG. It is a disassembled perspective view of the bracket for attachment. It is a disassembled perspective view of the bracket for a lap | wrap part attachment. It is a disassembled perspective view of the edge part fixing bracket. It is a disassembled perspective view of the bracket for attachment. It is a disassembled perspective view of the edge part fixing bracket. It is a front view of the principal part which shows the support | pillar fall and rotation prevention structure in the sound insulation wall of Example 2. FIG. 14 is a detailed view of a portion F in FIG. 13. It is sectional drawing in the GG line of FIG. It is a disassembled perspective view of the bracket for attachment. It is a vertical side view which shows the support | pillar fall prevention structure in the sound insulation wall of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Railing 2 Support | pillar 2a Flange 2b Flange 3 Sound insulation board 4 Wire rope 5 Mounting bracket 5a Substrate part 5b Mounting plate part 5c Slit (concave part)
5d Bolt insertion hole 51 Bracket body 52 Closure plate 52a Bolt insertion hole 6 Lap mounting bracket 6a Substrate 6b Mounting plate 6c Slit (recess)
6d Bolt insertion hole 61 Bracket body portion 62 Blocking plate 62a Bolt insertion hole 7 End fixing bracket 7a Substrate portion 7b Mounting plate portion 7c Bolt hole 8 Strut prevention wire rope 9 Mounting bracket 9a Substrate portion 9b Mounting plate portion 9c Slit (concave)
9d Bolt insertion hole 91 Bracket body portion 92 Closure plate 92a Bolt insertion hole 10 End fixing bracket 10a Substrate portion 10b Mounting plate portion 10c Bolt hole 11 Bolt / nut 12 Bolt / nut 13 Fastening bolt 14 Fastening bolt 15 Bolt / nut 16 Bolt / Nut 17 Nut 18 Bolt / Nut 19 Nut 20 Mounting Bracket 21a Substrate 21b Side Wall 21c Recess 22 Blocking Plate 22a Top Plate 22b Side Wall 22c Bolt Insertion Hole 23 Bolt Insertion Hole 24 Bolt / Nut 25 Bolt Insertion Hole 26 Cover 27 One side bolt 28 One side bolt

Claims (4)

A support rope drop prevention wire rope is attached to the lower ends of a plurality of support pillars for supporting a sound insulation plate standing on a rail in an elevated road, and both end portions of the support rope fall prevention wire rope are fixed to a rail, A strut rotation prevention wire rope is attached to the upper ends of a plurality of struts, and both ends of the strut rotation prevention wire rope are strut fall and rotation prevention structures on the sound insulation wall fixed to the strut,
A bracket for fixing the wire rope for preventing the column rotation to each column is fastened and fixed to each column by a bolt and a nut.
The bracket is formed with a recess that can be fitted with the support rope rotation preventing wire rope, and a closing plate that closes the opening of the recess is configured to be fastened and fixed to the bracket by a bolt and a nut. A structure to prevent the column from falling and rotating in the sound insulation wall.   The cover for closing the wire rope for preventing the rotation of the strut between the two struts adjacent to each other is detachably attached to the closing plates fastened and fixed to the struts. The structure for preventing the column from falling and rotating in the sound insulation wall. A bracket for fixing the support rope fall prevention wire rope to each support is fastened and fixed to each support by a bolt and a nut.
The bracket is formed with a recess that can be fitted with the wire rope for preventing the column from falling, and a closing plate that closes the opening of the recess is configured to be fastened and fixed to the bracket by a bolt and a nut. The structure for preventing the column from falling and rotating in the sound insulation wall according to claim 1 or 2.   The cover for closing the wire rope for preventing the column from falling between the two columns adjacent to each other is detachably attached to the two blocking plates fastened and fixed to the columns. The structure for preventing the column from falling and rotating in the sound insulation wall.

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