JP2552220B2 - Oblique beam construction method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slant beam construction method mainly used for a reverse striking construction method among various construction methods for constructing a mountain retaining frame. The construction method applicable to the case where the main material of the crossbeam is installed diagonally to the vertical plane in the girder-beam-type mountain retaining structure in.

[0002]

2. Description of the Related Art In constructing an underground structure, a large number of sheet piles are laid on the site for the purpose of retaining soil and stopping water, and the mountain retaining wall formed by the sheet piles is raised and cut. It is supported by beams.

In applying the above-mentioned mountain retaining frame,
Generally, the open-cutting method is adopted, but recently, instead of the open-cutting method, a so-called reverse-punching method has been adopted. As shown in FIGS. 11 to 14, this construction method constructs a retaining wall P with a sheet pile, SMW, or a concrete continuous underground wall, and then mainly casings the site surrounded by the retaining wall. After removing the earth and sand in the casing, the reinforcing bars are dropped and concrete is placed to construct the foundation pile A, and then the steel pillar B is built on the foundation pile A, and then the primary excavation, It is a method of constructing structures sequentially from the upper floor to the lower floor by applying the next excavation.
More specifically, when the excavation of the first basement floor is completed, concrete is poured to form the concrete slab s on the first floor, and then the second basement floor is excavated. The structure is built toward the basement in the order of laying slabs, etc., and it is often used in relatively large sites, sites where shortening of construction period is requested, sites where surrounding ground subsidence is concerned. This is the method used.

By the way, as described above, in the reverse construction method, after the soil retaining wall is provided and the foundation piles are driven, excavation is performed to form concrete slabs and the like on each floor. In order to prevent collapse, originally, it is necessary to erection the cross beams in a grid pattern, but if there is a concrete slab, it is difficult to erect it, especially if the earth retaining wall is other than the concrete continuous underground wall. In the case of a relatively small sheet pile or SMW, it is necessary to reinforce the soil retaining wall immediately after the primary excavation. This point will be specifically described with reference to FIG. 13. In order to support the earth retaining wall 3 using the concrete slab s previously cast, the beam receiving bracket 2 is fixed to the lower surface of the slab s,
A slant beam 5 is provided between the bracket 2 and a waving ridge 4 attached to the retaining wall 3, and a flint 6 is installed if necessary, and then, between the slant beam 5 and the bracket 2. It is operated so as to support the soil retaining wall 3 by pressing it with the attached hydraulic jack 7.

In addition to the above-mentioned reverse construction method, a method of reinforcing by using diagonal beams may be adopted, and in this sense, the diagonal beam construction method in a broad sense is compared with the original grid-like frame structure. Since it is used in a much smaller amount, it has a great advantage by itself. However, the conventional slanted beam construction method, as shown in FIGS.
15 must be obliquely abutted against the swelling surface 4 or the upper slab surface s, and the corresponding contact portion must be fixed to the swelling or the like. Therefore, as shown in FIG. Fixing a concrete concrete receiving object 8 with a bolt, and further placing the end of the slant beam 5 or the hammering 6 on the flange 8a of the metallic object 8,
It was necessary to cast and fix concrete C from above.

[0006]

As described above, the conventional oblique beam construction method not only requires the use of the concrete receiving member and the concrete placing on the abutting portion, but also the oblique beam itself. Since the setting angle of each metal is different at each site, it takes a lot of time to set the angle of the metal receiving object, and on top of that, the slanted beam or the end of the hammer 6 is placed on the flange surface of the metal object and fixed with concrete. It took a lot of time to harden, and there were many problems such as slanted beams and flint sometimes shifting during concrete curing. Moreover, when removing the slanted beam and flint,
Each time, the concrete part had to be destroyed, which required a lot of trouble and time.

Not only that. As described above, according to the conventional slant beam construction method, after placing the slant beam 5 on the concrete slab s and the receiving member 8 attached to the swell 4, the flint 6 is struck on the slant beam 5 which is inclined. The flint base material 6 in which the piece 1 was preliminarily assembled on the ground was erected diagonally as shown. In other words, it is extremely difficult to perform the work, in which the main material for slanting beams (slanted beams) 5 that is originally installed diagonally is also attached diagonally to the main material for slanting beams. It was very difficult to attach the bolts because fixing the struck piece involves working at a high place at a high position.

Moreover, when the slant beam 5 and the hammer 6 are placed at the center position of the flange surface of the uprising 4 which is arranged at right angles to the earth retaining wall 3 on the side opposite to the earth retaining wall, and fixed with concrete. A rotational moment is generated on the flange mounting surface of the angulation, which causes a large rotational load to be applied to the tip of the angulation bracket 4a, so that shearing force and rotational moment are simultaneously applied to the welded portion of the retaining wall 3 and the angulation bracket 4a. As a result, there is a problem in that a large-sized bracket having a very large strength must be arranged, and further, the welded portion has to be welded with a long leg length.

The present invention was developed in order to solve various difficulties that cannot be avoided by the above-mentioned conventional method. The purpose of the present invention is to have a strength enough to withstand a large earth pressure and to raise the abdomen. No matter what angle the slanted beam or stake hits against the work, it can be freely supported, and it is possible to eliminate the need for placing concrete, and the construction is simple. The slanted beam construction method was obtained.

[0010]

In order to achieve the above-mentioned object, the present invention fixes an abdomen against a retaining wall and then forms an angle piece having a constant upward angle with respect to the abdomen. After mounting, a plurality of rotating metal fittings made of male and female members that fit with each other are used, and oblique beams are formed by the following method.

That is, an angle piece for transmitting a load to the center of the web of the uprising is attached to the uprising, and
A first rotating metal fitting consisting of a male and female member is bolted to the angle piece, while the main member of the beam is kept substantially horizontal with the excavation ground, and a hydraulic jack is provided at one end of the main member. After the second rotating metal fitting is attached by the base structure, the entire main body of the cut beam thus assembled is suspended by the crane or the like, and the first rotary member is provided on the angle piece side. After bolting the other end of the main material to the metal fitting, raise the cut beam main material at an angle and attach it to the concrete slab mounting side or the diagonal beam receiving piece installed on the side of the beam material installed above. The diagonal beams are installed by tightening bolts.

Further, according to the present invention, an angle piece for transmitting a load to the center of the web of the waving is attached to the waving, while the main material of the beam is kept substantially horizontal with the excavated ground, and the ground is maintained. By assembling, the first rotating metal fitting made of a male and female member is bolted to one end of the main material, and the second rotating metal fitting is attached to the other end via a hydraulic jack. The entire main material of the cut beam is hung by a crane or the like, the first rotating metal fitting is bolted to the angle piece, and then the main material of the cross beam is diagonally raised to concrete the second rotating metal fitting. Including a slant beam construction method characterized by bolting to a slant beam receiving piece mounted on the side of the toslab mounting side or the beam member installed above, further, the main beam of the cross beam obtained as described above is also included. When erection, if necessary Also, while keeping it substantially horizontal with the excavated ground, a slamming piece is attached to one end of the main material, and a third rotating metal fitting is bolted to the other end, or an angle piece is attached. Separately attached to the abdomen side, bolt the third rotating metal fitting to this piece in advance,
Then, the construction method in which the flint piece is agitated and bolted to the side surface can be carried out.

In carrying out the present invention, a female member having a hemispherical seat formed in the center of a plate-like base formed by forming a plurality of bolt holes and a plurality of bolt holes are formed. It is desirable to use a rotating metal fitting composed of a male member having a pivot formed at the center of the plate-shaped base.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete construction procedure of the present invention will be described below based on the illustrated embodiments. As shown in FIG. 1, first, the uprising member 51 is placed on the bracket 50a, and the rotary metal fitting 20 made of a male and female member is mounted on the flange surface 51a of the rising member 51 via the angle piece 64. Install. Although the structure of the rotating metal fitting 20 will be described in detail later, the main body of the metal fitting is composed of a spherical male member 24 and a bowl-shaped female member 29 as shown in FIG. − Tighten bolts on the mounting surface of the sleeve 64. In addition, this angle piece is a key member for performing this method as described above,
It is a mounting piece that maintains an elevation angle of about 30 ° with respect to 51. By the way, in the case of attaching flint main material in addition to the cut beam main material, in response to this, the method similar to the above is used.
Although the piece 64 for setting the flint main material is attached to the, the attachment of the flint main material is not essential.

Next, as shown in FIG. 1, a temporary pedestal P is set on the excavation surface G so as to raise the abdomen 51 to almost the same level.
On the other hand, on one end surface of the beam main member 52 constituting the diagonal member, the rotating metal fitting 20 is fastened with a bolt, and a hydraulic jack 56 is attached to the other end of the main member 52, and the tip thereof is attached. As in the above, the rotating fitting 20 is bolted. All of this work is carried out while maintaining the main material substantially horizontal on the ground, and then the beam main member 52 thus grounded is hoisted through an appropriate crane, and then the angle piece 64 The rotating metal fitting 20 is tightened on the end face with bolts.

By the way, the assembly order different from the above, that is, the rotating metal fitting 20 is set in advance to the angle piece 64 attached to the uprising 51, and then one end surface of the main member 52 of the beam girder suspended by the wire is set. After tightening the bolts, loosen the wire that was being lifted, and attach the main material 52 to the excavation surface G as shown in the figure.
Alternatively, the hydraulic jack 56 and the rotating metal fitting 20 may be set on the other end of the main member 52 as described above after being mounted on the temporary receiving table P installed in the above.

Next, the case where the flint main material is attached to the main beam 52 will be described. In this case,
As shown in FIG. 3, as shown in FIG.
After assembling the rotating metal fitting 20 and the rotating metal fitting 20 as the base, the rotating metal fitting 20 is tightened with bolts to the angle piece 64 attached to the agitating side. This work is performed by holding each component of the stake as parallel to the main beam member 52 as shown in the figure, and then turning it inward toward the stake mounting position which is the side surface of the main beam member 52 as shown by the arrow in the figure. In other words, the angle is swung to the angle of the hitting piece, and the hitting piece 53a is joined to the flange surface of the main beam member 52 with bolts 53b.

Also in this case, the turning fitting 20 for mounting the hitting member is set in advance on the upright side, and the hitting main material having the hitting piece attached to the turning fitting is bolted. Of course, they may be joined.

In the case of attaching the above-mentioned blow using the conventional construction method, as shown in FIG. 14, it should be twisted further obliquely with respect to the side surface portion of the main beam 5 of the beam which is obliquely attached. Since the bonnet 6 had to be mounted, the mounting work was extremely difficult, and the work at a high place had to be done, which required a great deal of time and effort. Contrary to this, according to the present invention, as described above, the work of attaching the struck main material to the main beam of the girder can be performed near the ground, and while holding each member horizontally,
Not only the time required for assembly can be shortened, but also the work can be performed accurately and safely, so that the working efficiency can be greatly improved.

As described above, on both side surfaces of the main beam member 52,
If a pair of right and left flint main materials 53 are integrated, including flint pieces, this time, the tip end of the main beam 52 of the beam is hung at one point,
The slant beam receiving piece 59 attached to the upper slab s is lifted up to the position, and the end surface of the receiving piece 59 and the end surface of the rotating metal fitting 20 are fixed by bolting.

As will be described later, in the rotating metal fitting used in the present invention, the male and female members, which are the main constituent members of the metal fitting, have a spherical structure, and therefore even after the assembling of the cutting beam and the whipping are integrated in the horizontal plane. It has the feature that it can be set diagonally. In this way, the problem of the conventional construction method, which is the most problematic problem with the installation of slanting slant, at high places, is completely eliminated, and it can be replaced with safe and short-time work, which is extremely effective in improving work efficiency. . Further, as is clear from the above description, when carrying out the oblique beam construction method of the present invention, it is necessary to use a plurality of rotating metal fittings. Therefore, it may be described as a first rotating metal fitting, a second rotating metal fitting, or the like.

The details of each member used in the present invention will be described below. First, an example of the above-described rotating fitting 20 will be described with reference to FIGS. The metal fitting 20 is composed of a pair of upper and lower male and female members 21 and 22 as shown in the drawing. Of these, the male member 21 has a rectangular base 23 on one side thereof as shown in FIGS. 5 and 6. A receiving surface 23a is provided, and a spherical pivot 24 is formed in a protruding manner at the center of the opposite surface. Further, four reinforcing ribs 25 reaching the end of the base are fixed to the base of the pivot 24 in a cross shape with the center of the pivot 24 as a reference. Then, at the positions partitioned by the reinforcing ribs 25, long holes 26 for inserting bolts are formed at the same positions.

On the other hand, as shown in FIGS. 7 to 8, the female member 22 has a beam receiving surface 27a on the lower surface of a base 27 having the same width as the base 23 of the male member 21 and having a length about twice as long. A pedestal 28 having a cylindrical shape is formed to project in the central portion on the upper surface side, and a bowl-shaped receiving seat 29 having a hemispherical surface is recessed in the pedestal 28. The seat 28 is sized so that the lower half of the pivot 24 of the male member 21 is fitted thereto, and the annular edge 30 is formed with a screw hole 31 for attaching a retaining ring which will be described later. A reinforcing rib 32 is provided in the longitudinal direction at the center of the base 27, and
The rib 32 is sandwiched at the upper end of the joint between the pedestal 32 and the pedestal 28. An auxiliary rib 33 is arranged parallel to the base 27. Further, a plurality of bolt holes 34 are formed at symmetrical positions on both sides of the base 27 with the reinforcing rib 32 as a center line. The through-holes 33a provided in each of the auxiliary ribs 33 are through-holes for hanging the crane, which are used when mounting and removing the rotating fitting 20, and a shackle or the like is hooked on this portion to fit the entire fitting. It is for gripping.

The male and female members 21 and 22 having the above construction are used in combination as shown in FIG. That is, the pedestal of the female member 22
The hemispherical seat 29 provided on the 28 is fitted with the pivot 24 projectingly formed on the male member 21, and then the retaining ring.
35 is attached to the annular edge of the pedestal 28 so that the male and female members 21 and 22 are rotatable with respect to each other in all directions. As shown in FIG. 9, the retaining ring 35 has a half-split shape,
It is composed of a pair of left and right members 35a and 35b, and a concave surface 36 having the same curvature as that of the pivot 24 is formed on the inner edge thereof (see FIG. 10), and the bolt 38 is inserted through the bolt hole 37 provided in each of them. Screw hole 31 provided on the edge 30 of the pedestal 28
It is fastened by screwing it to the male and female members 21, 2
Combine the two.

In the present invention, by way of example, the rotating metal fitting 20 having the above-mentioned structure is attached to both ends of the main beam member 52 and, if necessary, to the root side of the main struck member 53, to construct a so-called oblique beam. Do like this. As mentioned above, as shown in FIGS. 1 to 3, at the construction site in the upside-down construction method, the slanted beam 52 and the struck slabs are struck between the slabs that were previously placed and the upset 51 that is attached to the retaining wall 50. The description of the example of disposing 53 will be slightly supplemented. As described above, the above-mentioned first rotating metal fitting 20 is attached to both ends of the main member of the beam as the slanted beam 52 by the grounding.
The beam receiving surface 23a of the male member 21 constituting the rotating metal fitting 20 is applied to the side and fixed by the bolt 54 and the nut 55. The second rotating metal fitting 20 is attached to the end of the slanted beam 52 corresponding to the slab side via a hydraulic jack 56 for pressing.

On the other hand, when fixing the right and left flints 53 at predetermined positions on the slanted beam 52, the third rotating metal fitting 20 is attached to one end of each flint.
The beam receiving surface 23a of the male member 21 in FIG. Then, with respect to the slanted beam 52 which has finished the framing as described above, while maintaining the horizontal state, the left and right flints 53, that is, the flint pieces 53a in the flint, are swung at various angles. It is brought close to the slant beam 52, and the piece is joined to the slant beam main body by a bolt nut 53b.

Then, the side of the bulging member 51 that comes into contact with the abdomen 51 is lifted by an appropriate method, and the oblique beam 52 is attached to the beam receiving surface 27a of the first rotating fitting 20 on the female member 22 side through the bolt holes 34. Use bolts 57 and nuts 58 to secure. After this, if the end of the diagonal beam on the opposite side is further lifted to the slab S side by an appropriate method, the diagonal beam 52 and the left and right fires 53, 53 are bellowed by the metal fittings 20 with respect to the uprising 51. Since it is connected to the rising side, the pivot 24 of the rotating metal fitting is used as the center of rotation for the oblique beam.
52 and a smash 53 rotate upward, and are erected while keeping an inclined state with respect to the abdomen 51. Then, the oblique jack 52 and the hydraulic jack 56
The female member 22 of the second rotating metal fitting 20 fixed via the slab s is fixed to the beam receiving bracket 59 fixed to the slab s by using bolts 60 and nuts 61, and the hydraulic jack 56 is operated as appropriate. Proper pressure is applied between the slab S and the slab 51 so as to provide proper proof stress. In addition,
When mounting the above-mentioned members, raise the rotating metal fitting 20 upright.
It may be fixed directly to the flange 51a of 51, or, as already mentioned, it is desirable to use an angle piece 64 as shown in FIG. 11 between them. In such a case, Be effective.

Incidentally, it is preferable that the above-mentioned angle piece has an angle (elevation angle) of about 30 ° with respect to the abdomen, and by doing so, the earth pressure of the earth retaining wall transmitted from the abdomen is increased. The effect of receiving it with oblique beams is fully exerted. In addition, the so-called oblique beam in this construction method is generally 20-40
It is often installed within the angle range of degrees, but in any of the above ranges, if the elevation angle of the reference angle piece is maintained at about 30 °, the angle of the rotating metal fittings connected to it can be set freely. Therefore, the above range can be sufficiently covered.

In the illustrated example, the angle piece 64 is composed of two members, that is, the base portion 62 and the receiving portion 63, but it goes without saying that it may be constituted by one member. Further, the shearing force generated in the angle piece has the above-mentioned configuration,
The structure does not need to be held by the shearing strength of the bolt, and the shearing force is received by the plate cross-sectional area of the portion indicated by reference numeral 63a. Furthermore, since a large angle is not generated with respect to the rotating metal fitting, a shearing force is less likely to be generated, so that the number of bolt holes 34 on the female member 22 side can be reduced.

Needless to say, it is also effective when the angle piece is used in the struck part, and both the diagonal beam component force of the load applied to the struck main material and the component force due to the struck part are retained by the shear strength of the bolt. In this case, it is necessary to double the number of bolts and the size is increased. However, the above-mentioned configuration does not cause such an inconvenience. Thus, if the angle piece of the present invention is constructed as described above, the shearing force generated to form the oblique beam can be taken up by the cross-sectional area of the plate 63a in the piece. Therefore, further miniaturization can be achieved.

Further, according to the present invention, when the angle piece for transmitting the load to the center of the web is used, since the rotation moment is not generated in the uprising, the uprising bracket itself can be downsized. In addition, since it is sufficient to perform welding that can withstand shearing force, there is an advantage that the welding leg length can be shortened, and as a result, construction time and installation cost can be significantly reduced.

It is preferable that the diagonal member receiving piece corresponding to the angle piece is also kept at an angle of about 30 ° as described above.

In the description of the embodiment of the present method, the example of attaching the slant beam in the upside-down construction method has been described. However, the slant beam construction method of the present invention raises this with the cutting beam in the conventional excavation construction method. Since it is possible to correspond to any inclination angle on the plane that occurs at the intersection of flint and upset,
This construction method can also be used when it is installed between these members.

[0034]

As described above, the slant beam in the normal reverse construction method forms an angle with the direction perpendicular to the earth retaining wall, in other words, with respect to the longitudinal direction of the uprising. It is installed at a right angle. However, as an exception, there are times when it is necessary to use a slanted beam that has only horizontal beams and vertical beams. Even in such a situation, by setting the angle piece 64, the beam receiving piece 20, two pieces and the hydraulic jack 56 as a cross beam, a structure in which the angle can be swung horizontally or vertically can be easily created.

Furthermore, in the present invention, since the male and female members use the rotating metal fittings which are rotatable in all directions, the cutting beam is orthogonal to the uprising of the retaining wall in the excavation method. The part that does not do or the part that joins the angry and the whipping,
Also, it can be used for erection of diagonal beams in the upside down construction method, and furthermore, the upholstery and cutting beams, stakes, and joints with diagonal beams are all performed with bolts and nuts, and it is not necessary to fix them by concrete. The effect of being able to quickly perform the attachment and detachment work of is demonstrated.

Further, in the rotating metal fitting used in the present invention, since the male and female members constituting the metal fitting are rotatably connected in all directions by the pivot and the hemispherical seat, they are angulated with the beam.
It is versatile because it can cope with any angle of inclination that occurs at intersections such as flicker and upset and upset and slanted beams.In addition, the male and female members are pivotally connected, and as surface contact As a result, there is an effect that it is possible to cope with a strong compressive force generated in the connecting portion of each member.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment in which a construction method of the present invention is applied to a reverse construction method.

FIG. 2 is a plan view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a side view showing an example of a rotating fitting.

FIG. 5 is a plan view of a male member of the metal fitting.

FIG. 6 is a side view of the male member of the above.

FIG. 7 is a plan view of the female member of the above.

FIG. 8 is a side view of the female member of the above.

FIG. 9 is a plan view of the retaining ring.

FIG. 10 is a sectional view of a retaining ring.

FIG. 11 is a side view showing the mounting relationship between the rotating metal fitting and the angle piece.

FIG. 12 is an explanatory diagram showing a conventional reverse-casting method.

FIG. 13 is an enlarged side view showing the erected state of the oblique beam.

FIG. 14 is a perspective view of the same.

FIG. 15 is a perspective view showing a root portion of the oblique beam.

[Brief description of reference numerals]

 20 Rotating metal fitting 21 Male member 22 Female member 23, 27 Base 23a, 27a Beam receiving surface 24 Pivot 25, 32 Reinforcing rib 26 Long hole 28 Pedestal 29 Receiving seat 30 Edge 31 Screw hole 33 Auxiliary rib 34, 37 Bolt hole 35 retaining ring 35a, 35b Ring member 36 Concave surface 38, 54, 57, 60 Bolt 50 Yamadome wall 51 Raised 52 Oblique girder (cutting beam main material) 53 Striking (striking main material) 53a Striking piece 55, 58, 61 nut 56 hydraulic jack 59, 64 beam receiving bracket 62 base portion 63 receiving portion 64 angle piece

Front page continuation (72) Tsuneyoshi Hioki 1-6-5 Nihonbashihonmachi, Chuo-ku, Tokyo Maruto Fuji Sheet Pile Co., Ltd. (72) Mitsumasa Yamamoto 1-3-8 Motoakasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch (72) Inventor Tomoaki Nibuya 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch (56) References: Kaihei 5-67631 (JP, U) Actual Kai 55-85142 (JP, U)

Claims (4)

(57) [Claims] 1. An angle piece for transmitting a load to the center of a web of an agitating member is attached to the agitating member, and a first rotating metal fitting made of a male and female member is bolted to the angle piece. On the other hand, while maintaining the main material of the beam as the horizontal surface of the excavated ground, a second rotating metal fitting is attached to one end of the main material via a hydraulic jack by the earthwork, and further, the earthwork is thus constructed. The entire main member of the beam is suspended by a crane and the other end of the main member is bolted to the first rotating metal fitting provided on the angle piece side, and then the main member of the beam is obliquely attached. The slanted beam construction method is characterized in that the slanted beam is raised and bolted to a slanted beam receiving piece mounted on the concrete slab mounting side or beam member side which is installed above. 2. An angle piece for transmitting a load to the center of the web of the waving is attached to the waving, while the main material of the beam is maintained by the ground structure while keeping the main material of the beam to be substantially horizontal with the excavated ground. Bolt the first rotating metal fitting consisting of a male and female member to one end of the, and attach the second rotating metal fitting to the other end via a hydraulic jack. A concrete slab in which the first rotating metal fitting is bolted to an angle piece and then the main member of the beam is diagonally raised to hang the second rotating metal fitting upward by suspending the whole with a crane or the like. A slant beam construction method characterized by bolting to a slant beam receiving piece mounted on the mounting side or beam member side. 3. A flint piece is attached to one end of the main material while keeping the main material of the flint on a substantially horizontal surface with the excavated ground, and a third rotating metal fitting is bolted to the other end of the main material. Or, after attaching the angle piece separately to the abdomen side, bolt the third turning bracket to this piece in advance,
The oblique beam construction method according to claim 1 or 2, wherein the hitting piece is then bolted to the side surface of the agitating member. 4. A female member having a hemispherical seat formed in the center of a plate-shaped base having a plurality of bolt holes, and a pivot at the center of a plate-shaped base having a plurality of bolt holes. 4. The slant beam construction method according to claim 1, wherein a rotating metal member formed of a formed male member is used.