JP2975297B2 - Casting block for construction work and steel tower temporary construction method using this block - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting block for construction work used for foundations of temporary towers, scaffolding towers, and the like, and to a temporary construction method of a steel tower using the casting block for construction work.

[0002]

2. Description of the Related Art Conventionally, as a foundation of a temporary tower and a scaffolding tower, an inverted T-shaped independent foundation using concrete, i-type,
An IV type having an integrated floor plate portion of a leg, a PC foundation tensioned with a PC steel rod, and the like are used, and a concrete block is often used as a branch line anchoring foundation.

[0003] For example, a block storage case made of a steel frame having a length, width and height of several meters each is made, and a required number of concrete blocks are put therein to make an anchor block for draining electric wires, or a branch line anchor. Used for blocks.

[0004] As shown in FIG. 10, in the IV-type concrete foundation method, a ground 11 is dug sufficiently deep, a concrete foundation 32 reinforced with reinforcing steel is installed, and a temporary iron tower 33 is connected. In this case, a withstand pulling support force T is obtained by a concrete foundation 32 reinforced with reinforcing steel and backfill soil 12 from above. In order to facilitate the destruction of the concrete foundation 32 when the steel tower is removed, a PC steel rod is used as a substitute for a reinforcing bar, PC is removed at the time of dismantling, and concrete is destroyed with a static crushing agent.
The V-type PC method may be adopted.

[0005]

In a method in which a required number of concrete blocks are put in a block storage case to form an anchor block for wire drainage or a branch anchor block, the specific gravity of the concrete block is relatively small. In addition, not only a considerable number is required to obtain the required load, but also the whole is bulky, so that the workability is poor and the concrete block is easily broken at the time of loading or dismantling.

As shown in FIG. 3 (a), there is a case where an existing concrete structure 10 buried in the ground 11 is to have a predetermined lifting support force T, or as shown in FIG. 3 (b). Even when a concrete block is used, the specific gravity with the backfill soil 12 is not so different from the backfill soil 12 even when the insufficient support capacity for the existing concrete structure 10 due to the insufficient soil amount 14 due to the cut soil 13 is used, and sufficient durability is provided. There was a problem that the lifting support force could not be obtained.

As shown in FIG. 10, in the IV type concrete foundation method, the construction method and structure are almost the same as those of the permanent structure, and the excavation work of the ground 11, the construction of the temporary tower, the backfill work of the backfill soil 12, etc. Is not only troublesome,
Loud noise and vibration are generated when the concrete foundation 32 is dismantled at the time of removal, and furthermore, it is difficult to dispose of the waste after destroying the concrete. When the so-called IV-type PC method is adopted, the noise and vibration at the time of concrete destruction are hardly felt, and it is evaluated in that respect. However, it is still difficult to dispose of the waste, and the jacking work of the PC steel rod by the jack is performed. However, there are problems such as the necessity of twice assembling and disassembling, which increases construction costs.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a casting block for construction work and a method for temporarily installing a steel tower using this block in order to obtain a construction method which does not require waste disposal, is simple, and has sufficient safety. Is what you do.

[0009]

SUMMARY OF THE INVENTION The present invention comprises a three-dimensional casting having a substantially regular polygon and a predetermined thickness.
It has a concave portion 15 for transportation, a fitting concave portion 18 and a fitting convex portion 19, and the fitting concave portion 18 and the fitting convex portion 19 of the adjacent blocks 8.
And a casting block for construction work characterized in that they are fitted to each other and arranged side by side, and the steel tower temporary construction according to the present invention is a step of digging a construction site and leveling the ground, Attaching the plate member 38 so that the upper surface thereof is generally horizontal, attaching a leg attachment beam 39 having a leg attachment member 40 on the floor plate member 38,
A construction method comprising a step of sequentially fitting the casting blocks 8 for construction work on the floor plate 38 while fitting them together, and stacking a plurality of steps where necessary, and a step of attaching the temporary tower 33 to the leg attachment member 40. It is.

[0010]

The required number of casting blocks for construction work 8 can be put in a block storage case to be used as an anchor block for draining electric wires or as a branch anchor block. In the case where the existing concrete structure 10 is to have a predetermined lifting support force, a necessary number of construction work casting blocks 8 are stacked in one or several stages and spread, and the lifting support force T Can withstand enough. By embedding the casting block 8 for construction work, a sufficient lifting support force can be obtained. Temporary tower 3
When removing 3, the casting block 8 for construction work, the flat plate 37, the floor plate material 38, the leg attachment beams 39, and the like can be reused, so that no noise or disposal of industrial products is generated.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 8 denotes a casting block for construction work according to the present invention which has a weight sufficient to act as a weight and is easy to handle. More specifically, the casting block 8 for construction work is a square, three-dimensional casting having a length, width, and height of 70 cm × 70 cm × 15 cm and a weight of 500 kg.

In the casting block 8 for construction work, a transport recess 15 is formed at the center of each side, a fitting recess 18 is formed on the left side of the transport recess 15, and a fitting recess 18 is formed on the right side. A mating projection 19 is formed, and an upper surface notch 16 is formed on the upper surface of the concave portion 15 for transportation, and a lower surface notch 17 is formed on the lower surface. On the upper surface of the casting block 8 for construction work, four truncated cone-shaped positioning projections 20 are formed at equal intervals at four corners, and on the lower surface, these positioning projections 20 are fitted. An alignment hole 21 is formed.

In the casting block 8 for construction work thus formed, the fitting concave portion 18 and the fitting convex portion 19 of the adjacent blocks 8 are sequentially fitted and connected in a plane.
It can also be sequentially stacked on the upper surface. When overlapping on the upper surface, the upper block 8 may be overlapped with the entire lower block 8, or the upper block 8 may be overlapped with the lower two blocks 8 by half. , The upper block 8 into the lower four blocks 8
It is also possible to make them overlap one by one.

FIG. 2 shows a block scissor 34 used for loading, rearranging, transporting, etc. the casting block 8 for construction work. This block scissors 34
The two arms 22 are rotatably connected to each other by a rotation shaft 23 near an upper end thereof.
And hang it on a crane, winch or the like. At this time, the locking pin 29 of the other arm 22 is engaged with the outside of the guide groove 28 of the safety lever 26 connected to the one arm 22 by the rotation pin 27. In this state, it is moved to the position of the casting block 8 for construction work, the engaging projections 24 at the lower ends of the arms 22 on both sides are fitted into the transport recesses 15 on both sides of the block 8, and the guide groove of the safety lever 26 28 is disengaged from the locking pin 29, and the engaging projection 2
4 is fitted into the lower surface notch 17 of the block 8. Then
The projecting portion of the carrying recess 15 is engaged with the engaging recess 25 of the arm 22.
Engage with. Before lifting the block 8, the locking pin 29 is engaged inside the guide groove 28 of the safety lever 26 to
The book arm 22 is not opened. In this way, loading, rearranging, transporting, and the like of the casting block 8 for construction work are performed.

An example of use of the casting block 8 for construction work constructed as described above will be described. (1) A block storage case made of a steel frame is made, and a required number of blocks 8 are put therein, and used as an anchor block for draining electric wires or as a branch anchor block. Since the block 8 is a casting and has a large specific gravity, a sufficient number of weights can be obtained with a small number, and the entire block is not bulky, has excellent workability, and is easy to handle during loading and dismantling.

(2) As shown in FIG.
When the existing concrete structure 10 buried in is to have a predetermined lifting support force T, the portion A where the lifting support force is to be provided, and around the existing concrete structure 10, The required number of blocks 8 is 1
When it is laid in layers or several layers, the lifting support force T
Can withstand enough. (3) As shown in FIG. 3B, in a case where the insufficient supporting force for the existing concrete structure 10 is compensated, a sufficient lifting supporting force can be obtained by embedding the block 8 as a permanent structure.

In the above-described embodiment, the case where the casting block 8 for construction work is a regular square is described, but the invention is not limited to this. For example, as shown in FIG. 4 (a), it may be a regular hexagon, and a transporting concave portion 15, a fitting concave portion 18, and a fitting convex portion 19 may be formed on each side. As shown in b), it is a regular octagon, and the carrying recess 15, the fitting recess 18, and the carrying recess 1 are sequentially arranged on eight sides.
5, the fitting convex portion 19, the carrying concave portion 15, the fitting concave portion 18, the carrying concave portion 15, and the fitting convex portion 19 may be formed.

[0018] Then the construction example of construction for casting block 8 pylons temporary construction method using the based on FIGS. 5 to 9 will be described. The temporary tower 33 to be constructed has a height of about 30 to 50 meters. First Step (FIG. 5 (a)) The construction site is divided into vertical, horizontal, and depth = 10m × 10m × 820mm.
Excavation to about 100mm in the excavated part
And spread it flat and level. A fall prevention fence 35 is provided on the outer periphery of the excavation site.

Second step (FIG. 5 (b)) Flat plates 37 are spread on the spread sand 36 by a crane or the like as shown in FIGS. This flat plate 37 has, for example, thickness × width × length = 20-30 × 15
An iron plate of 00 to 3000 × 3000 mm is used.

Third Step (FIG. 5C) Floor plates 38 are mounted on the flat plate 37 at predetermined intervals by a crane as shown in FIGS. At this time, the floor plate 38 is mounted such that the upper surface thereof is entirely horizontal. The floor plate 38 has a length of, for example, 9000
mm, a 300 mm wide H300H steel, and the mounting interval is 600 mm on both sides and 750 mm on the other parts.

Fourth step (FIG. 5 (d)) As shown in FIGS. 6 and 7, a crane-like, leg-shaped leg attachment beam 39 made of H-section steel of H400, for example, is mounted on the floor plate 38. This leg attachment beam 39
If assembled in a girder shape at the factory, transportation becomes troublesome, so it is divided into several parts, transported, and assembled on site. Specifically, as shown in FIG. 7B, the four corners of the girder are divided into four X-shaped parts 41, and are further divided into four linear parts 42 connecting these. Further, a leg attachment member 40 as shown in FIG. 8 or 9 is attached in advance to the intersection of the X-shaped portions 41 with the base plate 43 and the rib plate 44. As shown in FIG. 6, the X-shaped portion 41 and the linear portion 42 are fixedly connected to each other by welding plate members 45 perpendicular to surfaces that contact each other and by bolts 46. The leg attachment beams 39 assembled in the cross beam in this manner are attached to the floor board 38 previously spread by bolts 46 at appropriate locations.

Fifth Step (FIG. 5 (e)) As shown in FIG. 6, the casting blocks 8 for construction work are sequentially fitted and arranged on the floor plate 38, and at the necessary places,
Stack two, three, and four stages. When arranging the blocks 8 on the floor plate 38, the spacers 47 are arranged on the floor plate 38 so as to partially cover the edges of the leg attachment beams 39.
To make the height uniform. Specifically, first, the blocks 8 are stacked in two steps over the entire floor plate 38. Next, since a lifting force may be particularly applied to the four corners of the leg attachment beam 39, the leg mounting beam 39 is further stacked in two stages and stacked in four stages. Other parts are stacked in three layers or two
Leave it in a stack.

Sixth Step (FIG. 5 (f)) After the stacking of the casting blocks 8 for construction work, the temporary iron tower 33 is attached to the leg attachment material 40. In addition, the sheet 36 is placed on the block 8 from the aesthetic point of view, and the sand 36 is spread evenly.

When the temporary tower 33 constructed as described above is to be removed, the process shown in FIG. 5 may be performed in reverse order from FIG. The floor plate 38, the leg attachment beams 39, and the like can be reused, and no industrial waste disposal occurs.

[0025]

【The invention's effect】

(1) A block storage case made of a steel frame is made, and a required number of casting blocks 8 for construction work are put therein, and can be used as an anchor block for electric wire drainage or as a branch anchor block. In this case, since the specific gravity of the block 8 made of a casting is large, a sufficient number of weights can be obtained with a small number, and the whole is not bulky, has excellent workability, and is easy to handle during loading and dismantling.

(2) When the existing concrete structure 10 buried in the ground 11 is to have a predetermined lifting support force, the surroundings of the existing concrete structure 10
If the required number of blocks 8 are laid one on the other or several stages, they can sufficiently withstand the lifting support force T.

(3) In order to compensate for the insufficient supporting force for the existing concrete structure 10, a sufficient lifting supporting force can be obtained by embedding the block 8 as a permanent structure.

(4) When the constructed temporary tower 33 is removed, there is no noise due to the destruction of the concrete, and the blocks 8, the flat plate 37, the floor plate 38, the leg attachment beams 39, etc. can be reused, and No waste disposal occurs.

[Brief description of the drawings]

1 shows an embodiment of a casting block 8 for construction work according to the present invention, wherein (a) is a plan view, (b) is a front view,
(C) is an AA line end view, and (d) is a BB line end view.

FIG. 2 is a front view of a block scissor used for transporting a casting block 8 for construction work.

FIG. 3A is an explanatory diagram showing an example when a lifting support force is applied, and FIG. 3B is an explanatory diagram showing an example when a shortage of soil volume is compensated.

FIG. 4A is a front view when the casting block for construction 8 is hexagonal, and FIG. 4B is a front view when the casting block 8 for construction is octagonal.

FIG. 5 is an explanatory view showing a process sequence of a steel tower temporary construction method 9 using a casting block 8 for construction work.

FIG. 6 is an explanatory view showing a state where a casting block for construction work 8 is placed on a floor plate 38.

7A is a partially cutaway plan view of a state in which a flat plate 37, a floor plate 38, a leg attachment beam 39, and a casting block 8 for construction work are sequentially assembled, and FIG. 7B is a leg attachment beam 39. FIG.

FIG. 8 is a perspective view showing a state in which a leg attachment member 40 is attached to a leg attachment beam 39.

FIG. 9 is a perspective view showing another example of a state where the leg attachment member 40 is attached to the leg attachment beam 39.

FIG. 10 is an explanatory view of a conventional temporary tower construction state.

[Explanation of symbols]

8: Casting block for construction work, 10: Existing concrete structure, 11: Ground, 12: Backfill soil, 13: Cut soil, 14: Insufficient soil, 15: Conveying recess, 16: Notch on top, 17 ... Lower surface notch, 18 fitting recess, 19 fitting projection, 20 alignment protrusion, 21 alignment hole, 2
2 ... arm, 23 ... rotating shaft, 24 ... engaging protrusion, 25 ... engaging recess, 26 ... safety lever, 27 ... rotating pin, 28 ... guide groove, 29 ... locking pin, 30 ... wire locking Hole, 31 ...
Wire, 32: Concrete foundation, 33: Temporary tower, 34
... block scissors, 35 ... fall prevention fence, 36 ... sand, 37
... flat plate, 38 ... floor plate material, 39 ... leg attachment beam, 40 ... leg attachment material, 41 ... X-shaped part, 42 ... linear part, 43 ... base plate, 44 ... rib plate, 45 ... plate material, 46 ... bolt, 47 ...
Spacer, 48 ... sheet, 49 ... slip prevention material.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsunori Kawaguchi 5-4-9 Shinjuku, Shinjuku-ku, Tokyo Tokyo Electric Power Company Tokyo West Branch (72) Inventor Takashi Tsuchiya 1-3-1 Uchisaiwaicho, Chiyoda-ku, Tokyo No. Tokyo Electric Power Co., Inc. (72) Inventor Takehisa Koashi 2--11-10 Minamiazabu, Minato-ku, Tokyo Japan Koei Co., Ltd. (72) Inventor Haruji Yushiro 2--11-10 Minamiazabu, Minato-ku, Tokyo Nippon Koei Co., Ltd. (72) Inventor Yoshio Ito 2--11-10 Minamiazabu, Minato-ku, Tokyo Nippon Koei Co., Ltd. (72) Inventor Mikio Takemoto 1099-15, Tsuboi-cho, Funabashi-shi, Chiba (56) References JP-A-6-316942 (JP, A) JP-A 63-65704 (JP, U) JP-A 60-195336 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) ) E02D 27/42 E01C 5/00-5/22

Claims (6)

(57) [Claims] 1. A substantially three-dimensional casting made of a regular polygon and having a predetermined thickness.
8. A casting block for construction work, comprising: a fitting projection 8; and a fitting projection 19, wherein the fitting recesses 18 and the fitting projections 19 of the adjacent blocks 8 are fitted and arranged with each other. 2. The casting block for construction work according to claim 1, wherein the substantially regular polygon is a quadrangle, a hexagon or an octagon. 3. An alignment projection 20 is provided near a corner on the upper surface, an alignment hole 21 is provided near a corner on the lower surface, and the alignment projection 20 and the alignment hole 21 of the upper and lower blocks 8 are fitted. The casting block for construction work according to claim 1 or 2, wherein the casting block is overlapped. 4. A step of excavating and leveling a construction site, a step of mounting a floor plate 38 on the ground which has been leveled so that an upper surface thereof is generally horizontal, and mounting a leg on the floor plate 38. Attaching a leg attachment beam 39 having a member 40;
Are arranged while sequentially fitting them, and where necessary, a step of stacking a plurality of steps and a step of attaching a temporary tower 33 to the leg attachment member 40 are provided. Construction method. 5. A step of excavating and leveling a construction site, a step of laying a flat plate 37 on the leveled ground,
A step of mounting a floor board 38 so that the upper surface thereof is generally horizontal, a step of mounting a cross beam-shaped leg mounting beam 39 having a foot mounting material 40 on the floor board 38, On the floor plate 38, the casting blocks 8 for construction work are sequentially fitted and arranged, and where necessary, a step of stacking a plurality of steps and a step of attaching the temporary tower 33 to the leg attachment material 40 are described. A temporary construction method for steel towers using cast blocks for construction work. 6. Excavation of a construction site, and sand 36
Laying flat and leveling, leveling, laying flat plate 37 made of iron plate on laid sand 36, and attaching floor plate 38 made of H-shaped steel at predetermined intervals on flat plate 37 And an X-shaped leg-mounting beam 39 made of H-shaped steel, which is divided into an X-shaped portion 41 having a leg-mounting material 40 at a corner and a straight portion 42 connecting the X-shaped portion 41 and carried, and assembled at the site to construct a floor. A step of mounting on the plate material 38, a step of sequentially fitting the construction work casting blocks 8 on the floor plate material 38 while arranging them, and stacking a plurality of stages at necessary places; After completion of stacking, a step of covering the sheet 48 on the casting block 8 for construction work, spreading the sand 36 flat, and attaching the temporary tower 33 to the leg attachment material 40 from the viewpoint of aesthetics. Construction Tower temporary method using the construction work for the casting block.