JPS6322923A - Assembling type integrated corner bracing unit - Google Patents

Abstract

PURPOSE:To enhance the using efficiency of a assembling type integrated corner bracing unit without any trouble with truck transportation as well as reduce the space of storage by forming an integrated corner bracing unit by connecting diagonal member to both-end connecting pieces of a tie rod connected at right angle to shore strut-connecting main material. CONSTITUTION:A connecting piece 27 with contact face to be right angled to the axial line of a diagonal member during assembling priod is welded to both ends of a tie rod 21 consisting of a steel plate or H-steel which is abutted against a waling 1 and welded with a camber at the central part. The other ends of two diagonal members 23 are pivotally attached in a foldable manner to both left-and right-handed blades of a shore strut-connecting main material 22 be set on the central part of the corner bracing through a rotary bracket 25 and the support shaft 26. In assembling the corner bracing with the tie rod 21, the end face of the main material 22 is contacted with the rod 21 directly or indirectly, or the end faces of two diagonal members 23 are contacted with the connecting pieces 27 directly, and the contact portions are clamped with bolts 30, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to construction materials for mountain retaining used at civil engineering construction sites, and in particular to folding type integrated flint units that simplify assembly on site. It depends.

[Prior Art] As is well known, in mountain retaining work at civil engineering construction sites, after driving the sheet piles, the sheet piles are provided with an upright in the horizontal direction, and a cut beam is placed perpendicular to the upright. are connected to prevent landslides from collapsing. In order to withstand strong earth pressure at the joint between the strut and the strut, flint is often installed diagonally from both sides of the strut to the strut. Recently, instead of assembling this flint on site each time, the flint is integrated with a part of the strut to form a kind of block as shown in Figures A-B. The method that has come to be used is to attach the beams to the necessary locations on-site and then erect long struts to secure them in place.

First, the illustrated conventional type will be explained. Fig. 11 shows a flint block published in Japanese Utility Model Publication No. 59-7404, with the left and right wings of this main block main material 2, which is to be disposed perpendicular to the belly riser 1, as the axis of symmetry. A pair of diagonal members 3
．． 3 are joined together, and then the end face of the main material and the end face of the diagonal member opened in a V-shape are fixed together with a single mounting face plate 4. The one shown in Figure 12 is the one shown in
The piece disclosed in Japanese Patent No. 280 is used for both strut and flint, and the general structure is almost the same as the above, but in the latter, the member 5 that comes into contact with the vent is made of H-shaped steel, and A large number of reinforcing plates 6 are vertically sandwiched between the frontage surfaces of this member, and reinforcing plates 7.8 are welded to the end faces of the abutting members 5 and the side faces of the diagonal members 3. This is different from that shown in FIG. 11 above. Furthermore, the 11th
In Figures 1 to 12, reference numeral 9 indicates a long strut, and 10 indicates a sheet pile.

In addition, the present inventors previously published Japanese Patent Application Laid-Open No. 59-21820,
The main body of flint proposed a folding type integrated flint, but as shown in Fig. 13, this one has two
After attaching the diagonal material 12 of the book in a foldable manner and expanding the diagonal material when in use, the diagonal material 12 is attached to the belly riser 1 via the bolt nut H4 via the mounting piece 13 previously attached to the tip of the diagonal material. The arrangement was to conclude the agreement. As a result, there are problems in terms of strength as described below, which need to be solved.

[Problems to be Solved by the Invention] By the way, the conventional integrated flints as shown in Figures 11 to 13 have been proposed on a trial and error basis from the viewpoint of saving assembly man-hours on site. However, there are problems as explained below. First, this type of integrated flint is a product whose main purpose is to omit assembly on site, so it must be delivered to the construction site in a pre-assembled state (bulky state). You have to be able to do it. In order to make it possible to transport the assembled flint by truck, conventional integrated flints have a width of contact Q (see Figure 14).
However, it was not possible to avoid the restriction that the limit was approximately 3 TrL. To explain this point in more detail, as shown in FIG. 14, the loading platform width of the truck T is at most 2.0 to 2.3 m, and on the other hand, the mounting angle θ of the diagonal member 3 to the main member 2 for connecting the struts is
It is impossible to make it more than 45° from the viewpoint of strength,
Furthermore, since a connecting bar P' for connecting the flint to the strut main material is required at the tip of the main material, taking these factors into consideration, the contact width Q of the flint is calculated as follows, assuming the width of the main material is 8. Q-8
= 2 (P-P') or more cannot be achieved. by the way,
The wider the abutment width Q, the higher the flint effect, but in the conventional type shown in FIGS. 11 and 12, as will be explained in detail later, as the abutment width is widened, the connection Since the length P of the material has to be increased, there is a problem in that the contact width cannot be increased considering the restrictions of truck transportation.

On the other hand, when erecting struts in mountain retaining work, it is desirable to keep the distance between the struts (strut pitch) as wide as possible. The wider the pitch, the more work space there is for soil excavation, which helps improve efficiency. However, the wider the pitch, the larger the tosho, so the flint block also needs to be made larger, but this also increases the length of the main material P for connecting the struts, which was explained earlier, making it impossible to transport by truck. The result is overwhelming. In addition, as is well known, there are two types of flint installations where the angle θ is 45° and 30°, but the latter has a smaller bending span for uprighting than the former, so the strut pitch is Compared to the former, it is possible to maintain a space approximately 145 times larger. In other words, the latter is better as far as it is used as a flint, but the overall size of the flint is much larger than the former, so in reality, a 45° flint is often used. Particularly, among the integrated flints contemplated by the present invention, those with an angle of 30° have not yet been put to practical use.

In this way, since integrated flints are inherently bulky, it is necessary to make them as large and long as possible in order to make them transportable by truck and at the same time widen the strut pitch. It is necessary to satisfy contradictory demands such as:

Incidentally, as shown in Fig. 13, there is also a known example in which the constituent members of the integrated flint are foldable for ease of transportation; is mounted by directly fastening it to the backrest 1 through the piece 13 with bolt nut H4, and since a shearing force parallel to the backend is always applied to this fastening bolt during use, it is not practical. There was a problem above. Therefore, we tried to solve this problem by using high-tension, super-strong bolts, but this solution was not possible in order to reduce the cost burden.

Furthermore, the conventional type shown in FIGS. 11 and 12 has the following problems. This point will be explained based on FIG. 15. When this type of flint is installed, the flints are installed in pairs, left and right, as viewed from above, as shown in the figure. However, it is possible to tighten the bolts to match the pitch of the bolt holes in the upright 1 (see reference numeral 15) for whichever is to be installed first, but when extending the strut and attaching the flint on the opposite side, In this case, the mounting hole 16 drilled in the flint often does not match the bolt hole 26 on the upright side, resulting in the inconvenience of having to drill a gas hole again.

[Means for Solving the Problems] The present invention is intended to solve all the problems of the conventional type described above, and the means thereof are as follows. That is, a joint piece having contact surfaces perpendicular to the axis of the diagonal member during assembly is welded to both ends of the joint member to be brought into contact with the diagonal member, and a joint piece is welded to the center part separately from the above-mentioned member. A flint main body is prepared by arranging a main material for beam connection and two foldable diagonal members pivotally attached to the left and right wings of the main material, and further, when combining the joint material and the flint main body, The end surfaces of the main members for connecting the struts are directly or indirectly brought into contact with the joint material at right angles, and the end surfaces of the two diagonal members are also brought into contact at right angles with the joint pieces of the joint materials. The above-mentioned assembly-type integrated flint unit is characterized in that each of the abutting portions is fastened with bolts and nuts. With such a configuration, all of the above-mentioned problems are solved.

[Function] That is, according to the present invention, two wings are provided on both wings of the main member for connecting the strut.
Since the flint main body, which is made up of book diagonals pivoted so that they can be folded freely, and the splicing material used in combination with the main body during assembly are each made up of separate members, the bulk during transportation and storage is reduced, and transport by truck is possible. In addition, since the configuration is as described above, the diagonal members should be installed at angles of 45° and 30°, etc. to the main member for connecting the struts. It also does not cause any inconvenience during transportation. Not only that, but no shearing force is applied to the bolts at any joint, which was unavoidable with the conventional type, and a compressive force that is not overly applied to the bolts is applied, so this point is also superior to the conventional type. It exhibits much superior action and effect compared to other products.

[Example] Hereinafter, regarding the prefabricated integrated flint unit of the present invention,
This will be explained in detail based on the illustrated embodiment.

1 and 2 show an embodiment of the present invention, with reference numeral 20
2 shows a flint main body, and FIG. 2 shows an example of a joint material (reference numeral 21a) used in combination with the flint main body. FIG. 3 is a plan view showing another embodiment (21b) of the splice material. In the figure, reference numeral 22 is a main member for connecting the struts, and 23 is a diagonal member, both of which are made of H-beam steel. However, the diagonal members are installed symmetrically on the strut connection side of the main member 22 at an angle of θ.
The diagonal protrusions 24, 24, oriented in a direction corresponding to After fixing a rotating bracket 25, 25 to one end of the upper part, that is, the side in contact with the projecting piece, the diagonal member is made rotatable (foldable) relative to the main member 22 via this bracket and the support shaft 26. Connected to tatami mats.

In this way, a flint main body having the main member 22 and diagonal member 23 as the main constituent members is constructed, and this is used in combination with a joint member having the following structure. The embodiment of the joint material is as shown in FIGS. 2 and 3. To explain from FIG. (Flange surface of H-beam steel) Joint pieces 27 and 27 are formed on both ends by welding, and the end faces are formed on a surface 27 perpendicular to the axis of the diagonal member.
a is formed. The camber 34 provided at the center of the joint material 21a is installed when the length of the l17J beam connecting main material 22 used in combination with this joint material is shortened, and is not necessarily necessary. Furthermore, even if the main material 22 is short, a giraffe jack (not shown) can be interposed between the main material and the joint material.

The joint material 21b shown in FIG. 3 is mainly composed of a single steel plate, and the other constructions are the same as described above. Figure 5 shows the joint material (general code is 21)
As shown in FIG.
8. The manner in which the mounting holes are installed will be explained below. As shown in Figure 7, the tummy tuck 1 usually has a length of 100 mm.
Alternatively, bolt holes 29 for attaching flint are bored at a fixed pitch A of 150 mm. Normally, a mounting hole having a position and diameter corresponding to this bolt hole may be drilled on the joint material side, but in the present invention, in particular, the mounting hole 28 (general code) corresponding to the bolt hole is as follows. It is a long hole with the following structure.

That is, in the first case, as shown in Figure 8,
A long hole 28a is formed so that the pitch is the same as the pitch A of the bolt hole of the rear riser 1 or a multiple of the pitch A, and the long diameter thereof is a value of 2d or 3d based on the hole diameter d of the bolt hole. to drill.

In the second case, as shown in FIG. 9, the bolt hole pitch A is twice or three times (2
maintain a pitch of (a multiple of A or more) and at least rA+d
A long hole 28b having a major axis of J is bored. Incidentally, it goes without saying that the short axis of the elongated hole is equal to the diameter d of the bolt hole 29.

Joint material 21a or 2 having mounting holes 28 as described above
1b, as shown in FIG.
As shown by the solid lines in FIG. It is expanded to the left and right via the provided support shaft 26, and one end surface of the diagonal member (
Projection piece 24.2 with the main material 22 (upper part in the figure) fixed W
4. Next, after fastening the contact surfaces with bolts and nuts, the joint material shown in FIG. 2 or 3 is
It is applied to the end faces of the diagonal member 23 and the connecting main member 22 which have been expanded as shown in the front V, and the abutting surfaces thereof are tightly tightened with bolts and nuts 30. As shown in Fig. 6, the integrated flint material assembled in this way is manufactured by first applying the abutment surface of the splicing material 21 to the attachment position on the side of the upholstery 1, and then inserting a hole into the upholstery. After aligning the bolt holes 29 provided in the joint material 21 with the mounting holes 28 provided in the joint material 21, they are fixed with bolts and nuts. Next, cut the end face of the main member 22 for connecting the strut! 2
After attaching the end of the sill 9 and attaching the connecting plate 31 to this connecting part, each part is tightened with bolts and nuts, so that the integrated flint material is installed between the strut 9 and the upright 1.

[Effects of the Invention] Since the integrated flint material of the present invention has the above structure, it exhibits the following effects.

First, according to the present invention, the integral flint main body 20 and the elongated joint material 21 are made of a foldable type.
Since the parts are assembled so that they can be disassembled, when transporting them to and from the site, the main body side can be folded to make a long piece, and the joint material side can also be disassembled to make a long piece. This eliminates restrictions on truck transportation.

In addition, as mentioned above, with the conventional integrated flint, the installation angle θ of the flint had to be 45° due to transportation constraints, but now the diagonal member can be attached to the main connecting member so that it can rotate freely. Therefore, the above-mentioned restriction on the mounting angle is also removed, and the mounting angle is 30'.
It also has the effect of making it possible to put into practical use an integrated flint with a mounting angle of .

Second, as a result of being able to provide an integrated flint with a mounting angle of within 45° as described above, it is possible to widen the strut pitch compared to conventional products, which greatly improves the effectiveness of the flint. can be done. In other words, since it is possible to increase the distance between the supporting points of the flint, it is possible to improve the efficiency of excavating earth and sand when it is used at a large site with a large amount of soil when mowing. Furthermore, when assembling and disassembling on-site, it is only necessary to operate the bolts and nuts on the contact surfaces, and there is no need to assemble or remove all the parts, which helps save labor.

Thirdly, in the integrated flint of the present invention, the contact surfaces between the diagonal member 23 and the projecting piece 24 and the contact surfaces between the diagonal member 23 and the joint piece 27 are both relative to the axis of the diagonal member. Since they are arranged at right angles, no shearing force is applied to the bolts 30 used in this part, and only a load in the compression direction is always applied. Therefore, ordinary bolts 1 to 1 are sufficient as the bolts, and there is no need to use super strong bolts, which is advantageous in this respect as well.

Fourthly, since the attachment hole for the rib provided in the joint material of the present invention is configured as a long hole as described above, the following advantages are exhibited. In other words, as explained earlier based on FIG. The inconsistency could not be absorbed by the conventional mounting holes, but in the present invention, the mounting holes are made into elongated holes 28a or 28b having a pitch like a curved water. Even if the axis of the bolt is slightly twisted, or the hole pitch between the mounting hole and the bolt hole is misaligned, there is no need to create a new gas hole (drill the hole and fix it). Since the bolt hole 30 and the mounting hole 28 of the bolt hole 28 can be held at any position so as to pass through the bolt hole 30, the workability in mounting is improved.

Incidentally, when the joint material in the present invention is made of H-shaped steel as shown in FIG. 2, the following effects can be obtained.

That is, in general, when retaining a mountain, a retaining pile 31 made of sheet pile or H-shaped steel is driven into the soil, and then
On the side of the treadmill 1 is arranged continuously without a break, and then an integrated flint is fixed at right angles to the side of the treadmill, but this type of construction does not necessarily exist. do not have. For example, as shown in FIG. 10, the riser 1 is not continuously erected to the pile 11 made of H-shaped steel, and the discontinuous part 33 of the riser is caused by the presence of a workpiece 32 rising from the excavation surface. may occur. Even in such a case, it is possible to use
Since the part that comes into contact with the flint is made of H-beam steel, it has enough strength to receive the axial load from the struts, so it can be used even in areas where there is no flint. This effect is achieved. - As mentioned above, the prefabricated integrated flint unit of the present invention comprises:
Widen the contact width Q of the flint, or increase the installation angle θ of the flint.
Even if the size of the flint is made smaller, it will not cause problems in truck transportation, so to speak, it will be possible to provide a product with high efficiency in the use of flint. It also has the utility of being able to plan the area of space.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a flint main body of a prefabricated integrated flint unit according to the present invention, FIG. 2 is a plan view showing an example of a joint material used in combination with the flint main body, and FIG. A plan view showing an embodiment, FIG. 4 is a side view of the joining piece in the joint material, FIG. 5 is a front view showing the attachment surface of the joint material to the raised side, and FIG. 6 is a view showing the use of the flint unit of the present invention. A plan view showing the state, FIG. 7 is a front view showing the mounting surface of the belly riser, FIGS. 8 and 9 are front views showing an enlarged part of the mounting surface of the joint material, and FIG. 10 is the main view. A plan view showing how the flint unit of the invention is used, FIGS. 11 and 12 are perspective views showing a conventional integrated flint unit, FIG. 13 is a plan view showing a foldable flint unit, and FIG. 14 is an integrated flint unit. FIG. 15 is an explanatory diagram showing a state in which the treated flint is placed on a truck, and FIG. 15 is a plan view showing a state in which the integrated flint is installed on a strut. 20... Flint main body, 21.21a, 21b... Joint material, 22... Main material for strut connection, 23... Diagonal material, 2
4... Projection piece, 25... Rotating bracket, 26...
Support shaft, 21...Joint piece, 28.28a, 28b...
・Mounting hole, 29... Bolt hole 30... Bolt, 31
...Pile, 1...Horitake, 9...Structure beam. Applicant: Marufuji Sheet Pile Co., Ltd. Agent
Person Ashi 1) Naoe Figure 4 Figure 13 @ Figure 14

Claims (1)

[Scope of Claims] 1. Joining pieces having contact surfaces that are perpendicular to the axis of the diagonal member during assembly are welded to both ends of the joint member to be brought into contact with the diagonal member, and the member is different from the member. Separately, a flint main body is prepared in which a main member for connecting the struts is disposed in the center, two foldable diagonal members are pivotally attached to the left and right wings of the main material, and the above-mentioned splicing material and the flint main body are prepared. When combining these, the end faces of the main members for connecting the struts are brought into direct or indirect contact with the joint material at right angles, and the end faces of the two diagonal members are also brought into contact with the joining piece of the joint material. 1. A prefabricated integrated flint unit, characterized in that each abutting part is abutted at right angles and then fastened with bolts and nuts. 2. The prefabricated integrated flint unit according to claim 1, wherein the joint material is composed of a single steel plate. 3. The prefabricated integrated flint unit according to claim 1, wherein the joint material is made of H-shaped steel. 4. The prefabricated integrated flint unit according to claims 1 to 3, wherein a camber is welded to the center of the joint material.