JP3279950B2 - Surface ground using a surface ground formation block and a method of constructing a plant using the surface ground - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for simplifying the work related to ground preparation and removal in a large equipment operation area requiring a large ground pressure or a storage area for heavy products.

[0002]

2. Description of the Related Art In the installation of heavy products in a nuclear power plant and a reprocessing facility, in addition to the large amount of products, the weight of a single product may be large. It is essential to reinforce the ground for storing heavy products.

[0003] As a ground curing that can withstand a large load, it is common to create a ground with a surface layer reinforced by concrete containing reinforcing steel (prior art-1).

[0004] A method of laying an iron plate on the ground so as to temporarily withstand a large load is also used (prior art-2).

Further, a method of reinforcing the ground by piling is also used (prior art-3).

[0006] The existence of these prior arts is disclosed in
It is pointed out from the 31st line to the 37th line in the fifth column of the 96 publication.

[0007]

The hardening of the ground by pile driving is time-consuming, so a method of laying an iron plate on the ground can be adopted as a time-saving method. However, the iron plate alone is insufficient in strength and easily shifts temporarily. Only available to

[0008] The method of reinforcing the ground according to the prior art 1 described above requires a concrete training period, which takes too much time. Moreover, it does not consider removal after the use of the reinforced ground. In order to remove the ground, it is necessary to sufficiently crush the concrete with the reinforcing steel forming the surface of the ground to a size that can be transported by transporting equipment such as a bulldozer or a dump truck and then remove the ground.

In the construction of a plant of a nuclear power plant, the components 3 of the nuclear power plant are carried in using a mobile lifting machine 2 (commonly called a crawler crane) which is a large-sized construction lifting machine as shown in FIG. .

[0010] As a combination of the prior art, there may be a plan to construct the reinforced ground with reinforced concrete and steel plates.

In the case of a large-sized mobile hoist capable of carrying a large and heavy product such as a component of a nuclear power plant, the ground pressure is very large (at most about 90 t / m 2). Become.

[0012] In order to operate the large-sized mobile lifting machine 2 having such a large contact pressure, it is necessary to construct a solid foundation ground capable of withstanding the heavy lifting machine 2 sufficiently. However, in the case of a nuclear power plant, other projects are often set permanently in the area where the large mobile lifting machine 2 is operating or in the range used as the foundation ground. The ground created for the operation of the large mobile hoist 2 is removed when the construction of the nuclear power plant progresses and the large mobile hoist 2 becomes unnecessary. The foundation ground for the conventional large-sized mobile lifting machine 2 is composed of reinforced concrete and an iron plate.

In order to remove the reinforced concrete, the reinforced concrete constituting the reinforced ground must be sufficiently crushed to a size that can be transported by a transportation device such as a truck. Further, it is impossible to reuse the reinforced concrete once crushed as the foundation ground for the large-sized mobile hoist 2 at another place.

[0014] Therefore, there is a demand for a temporary reinforced ground forming means which is portable, can be easily set and removed, and can be reused in a large equipment operation area requiring a large ground pressure.

A first object of the present invention is to provide a surface ground forming block which can be reused, can suppress mutual displacement in the vertical and horizontal directions when a plurality of blocks are installed, and can be easily laid or removed. By providing the surface ground used
A second object is to provide a method for constructing a plant using the surface ground.

[0016]

A first means for achieving the first object is to form a plurality of surface grounds placed on the ground.
Block, wherein the surface ground formation block comprises water.
One side of two opposing sides of a square with a rectangular cross section
The protruding part with the protruding part and the upper protruding part is
At right angles, and the other side has a convex on the other side.
Having a recess engaging with the portion at right angles to the other side
Shape and is adjacent to the entire circumference of the block
Horizontal and flat, overlapping the block vertically
Having an upper or lower overhang having a smooth surface,
Blocks for multiple surface ground formation
Superimposing the upper overhanging portion and the lower overhanging portion, and
And the convex part and the concave part of the adjacent block
It is characterized that it was constructed by laying on the ground
It is the surface ground to be the symbol .

[0017] Similarly the second unit, the first unit, the block is reinforced concrete layer and the surface layer fabric which comprises a metal plate provided on the reinforced concrete layer top
It is a board .

The third means is the surface ground in which the fixing member attached to the metal plate is embedded in the reinforced concrete layer in the second means.

[0019] Similarly the fourth means, in any one unit from the first means to the third means, the surface areas of the lower surface and the upper surface of the lower projecting portion of the upper extension portion is at the same level
It is a board .

[0020]

[0021]

Similarly, the fifth means comprises the first to fourth means.
In any one of the above-described means , the plurality of surface ground formation blocks are spread on sand placed on the ground.

The sixth means for achieving the second object is as follows .
A mobile lifting machine is mounted on the surface ground of any one of the first to fifth means , and thereafter the mobile lifting machine is operated on the surface ground to a predetermined location of a plant component. This is a method of constructing a plant that performs a hanging operation of a plant.

A seventh means is a plant construction method according to the sixth means, wherein the plant components are assembled in large groups before the hanging operation.

[0025] According to the first means, each surface ground forming blow
Construction of surface ground and removal of demolition by moving rocks
Can be done quickly. In addition, multiple surface ground
When the blocks are spread and used, the surface
The block overlaps with other surface ground formation blocks all around.
Stability, and heavy loads such as mobile hoists
Even if it is, the adjacent surface ground formation block is
In the horizontal direction
It becomes difficult to shift .

According to the second means, in addition to the function of the first means, since the metal plate is coated on the upper surface of the reinforced concrete layer reinforced with the reinforcing steel to also protect the reinforced concrete, the surface layer ground formation block is durable. In this way, it is possible to obtain the effect of increasing the degree of reuse of the surface layer ground formation block and enhancement of the ground strength.

According to the third means, in addition to the function and effect of the second means, the metal plate is firmly mounted on the upper surface of the reinforced concrete layer by the fixing member deeply embedded in the reinforced concrete layer. Peeling and warpage are reduced, and the effect of making the surface layer ground formation block more durable and long lasting is obtained.

According to the fourth means, in addition to the functions and effects of any one of the first means to the third means, a plurality of surface ground formation blocks are spread over the upper surface of a certain surface ground formation block. The lower surface of the overhang portion is in contact with the upper surface of the lower overhang portion of the adjacent surface layer formation block.
For this reason, the effect of being able to immediately distribute the load applied to the former block to the lower overhang of the latter block is obtained.

[0029]

[0030]

According to the fifth means , in addition to the functions and effects obtained by the first means to the fourth means , an adjustment sand is placed on the ground so as to eliminate unevenness of the ground, and is placed on the sand. It is possible to obtain the flatness between a plurality of blocks to be cut, and to obtain the effect of adjusting the amount of sand to flatten the sinking amount between the plurality of blocks. The surface is obtained.

According to the sixth means , since any surface ground from the first means to the fifth means is used as the ground for operation of the lifting machine, the surface ground can be formed easily and quickly. In addition, the operation start time of the mobile lifting machine on the surface ground can be advanced. For this reason, the start time of hanging the components of the plant is advanced, and the effect of contributing to shortening the construction period of the plant construction can be obtained.

According to the seventh means , in addition to the functions and effects of the sixth means , since the plant component products are large before the hanging operation, the number of times of hanging is small, and the construction period of the plant construction can be further shortened. The effect obtained is obtained.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of a construction method according to the present invention, in which a portable and recyclable surface layer forming block is applied in a large equipment operating area requiring a large ground pressure, will be described.

FIG. 1 shows a portable temporary ground block 1 (hereinafter simply referred to as a block 1) as a portable and recyclable surface ground forming block in an operation area of a large equipment requiring a large ground pressure, which is an embodiment of the present invention. ) Is applied as a temporary foundation for an operation area of a large-sized mobile lifting machine 2 used for carrying in a product in the construction of a nuclear power plant.

The construction of the nuclear power plant is carried out by using a mobile hoist 2 (commonly called a crawler crane), which is a large-sized construction hoist as shown in FIG. Of the nuclear power plant component products 3 which have been turned into and carried out.

In the case of a large-sized mobile hoist 2 capable of carrying a large and heavy product such as a component of a nuclear power plant, an extremely large contact pressure (maximum of about 90 t / sq.m.) In order to operate the large-sized mobile lifting machine 2 having such a large contact pressure, it is necessary to construct a solid foundation ground capable of withstanding the large-sized mobile lifting machine 2.

However, in the case of a nuclear power plant, other plans may be permanently set in the area where the large-sized mobile hoist 2 is operating or in the area used as the foundation ground. Because of the large number, the ground created for the operation of the mobile crane 2 is removed when the construction of the nuclear power plant progresses and the mobile crane 2 becomes unnecessary.

In order to remove the block, the block 1 constituting the reinforced ground is made large enough to be transported by a transport device such as a truck.

The loading / unloading of blocks to / from transport equipment such as trucks, the spread of the blocks on the ground, and the removal of the blocks are performed using a hoist.

Then, it is transported to a new land in a size that can be transported and reused.

Thus, the present embodiment can be applied to plant construction.

The portable and recyclable block 1 according to the present embodiment, which is portable and recyclable in a large equipment area where a large ground pressure is required, is extremely effective for forming a temporary reinforced ground which can be easily set and removed and which can be reused. FIG. 2 shows the detailed structure of the block 1, a method of forming the ground using the block 1, and a method of using and removing the block 1.

FIG. 2 shows a block 1 based on reinforced concrete invented by the inventor of the present application.

The block 1 in FIG.
The iron plate 5 is provided so as to cover the upper surface.

The iron plate 5 is provided with a stud dowel 6 as a fixing means embedded in the reinforced concrete, and the reinforced concrete and the iron plate are firmly fixed by the stud dowel 6 embedded in the reinforced concrete.

A block 1 having a plate structure made of a composite material of the reinforced concrete 4 and the iron plate 5 configured as described above is formed.

On the iron plate 5 of the block 1, a hanging bracket 7 for transportation is provided.
Is set to enable lifting and transportation by a hoist.

At this time, a box-shaped recess is provided in the hanging metal member 7 of the iron plate 1 so that the hanging metal member 7 can be accommodated in the box-shaped hollow, so that a more flat temporary ground can be set up.

In order to make it possible to set up a flat temporary ground, the hanging bracket 7 is not a fixed type as shown in FIG. 2, but an eyebolt is screwed into the block 1 and detached when used as the ground. You may make it a flat surface.

As shown in FIG. 2, the block 1 has a step portion formed in the periphery thereof.

The step has an appearance as if the layer of the reinforced concrete 4 is divided into upper and lower parts and shifted in the diagonal direction of the block 1.

In the step shape, 14 is referred to as a lower projecting portion of the block 1, and 15 is referred to as an upper projecting portion of the block 1.

Of course, the layer of the reinforced concrete 4 is not divided into upper and lower parts but is a continuous integrated material.

In the first embodiment of the present invention, the block 1 shown in FIG. 2 described above is used as a basic type, and the basic type is modified. As shown in FIG.
A convex portion 12 and a concave portion 13 are provided in the horizontal direction at the peripheral portion of the short side facing each other as a horizontal displacement suppressing engagement portion.

The convex portions 12 and the concave portions 13 fit with the convex portions 12 and the concave portions 13 of the adjacent block 1 and overlap in the horizontal direction.

Due to the overlap, horizontal displacement between adjacent blocks 1 can be suppressed.

The other structure is the same as the structure of the block 1 in FIG.

As described above, the block 1 not only suppresses the horizontal displacement between the adjacent blocks 1 as described above, but also causes the adjacent blocks 1 to move in the vertical direction at the adjacent portions around the entire circumference as shown in FIG. Because it becomes an overlapping combination structure,
The block has a suitable shape as a portable and recyclable block 1 used in a large equipment operating area requiring a large ground pressure for the purpose of suppressing the displacement between the blocks in the vertical direction.

In this case, when setting the block 1,
As shown in FIG. 4, by disposing the lower overhanging portion 14 of the block 1 to receive the upper overhanging portion 15 of the block 1, vertical displacement between the blocks 1 can be suppressed.

Further, in the second embodiment of the block 1 shown in FIG. 3, when the block 1 is set as a composite shape, the horizontal projection 12 and the horizontal recess 13 of the block 1 are engaged with each other to prevent the horizontal displacement. At the same time, the lower overhanging portion 14 of the block receives the upper overhanging portion 15 of the block to suppress vertical displacement, thereby suppressing both horizontal and vertical displacements.

Since the surface ground forming block of the first embodiment has a metal plate 5 on its upper surface, it is hardly damaged even when a heavy object is placed thereon, and the solid reinforced concrete 4
It is hard to be displaced and hard to be warped because it is fixed and integrated. In addition, the load on the metal plate is transmitted to the solidified body, dispersed and easily transmitted to the existing ground.

Further, the positions of the plurality of suspending members 7 are set so as to be horizontal when the block 1 is suspended, for example, as shown in FIG.

Next, an example of installation of the block 1 shown in FIG. 3 on the ground will be described.

FIG. 5 and FIG. 6 show examples of installation of a portable and recyclable block 1 based on reinforced concrete 4 and used in a large equipment operating area requiring a large ground pressure.

In order to set a portable and recyclable ground block 1 to be used in an operation area of a large equipment requiring a large ground pressure, the improved ground or the improved ground 16 is set in an area creation area as shown in FIG. The adjustment sand 17 is spread and flattened.

When the flat state is attained, the plurality of blocks 1 are hung at predetermined positions in the operation area of the construction hoist using the hoist, and the peripheral portions are overlapped as described with reference to FIG. To set.

Further, the protrusions 1 between adjacent blocks
2 and recess 13 are engaged.

If one of the adjacent blocks is predicted to have a large sinking amount, more adjustment sand is laid thereunder.

When a more solid ground is to be formed,
It is also possible to place leveling concrete on the improved ground 16 and spread the adjusting sand 17 on it, and then set the portable and recyclable ground block 1 to be used in the operation area of large equipment requiring large ground pressure. It is possible.

In order to simplify the ground curing, the construction of the improved ground 16 is omitted, and a portable and recyclable ground block 1 used in a large equipment operating area requiring a large ground pressure is set. The ground preparation may be completed.

FIG. 6 shows a method of setting the portable and recyclable block 1 shown in FIG. 3 for use in a large equipment operation area requiring a large ground pressure in the present invention.

In order to set the portable and recyclable block 1 used in the large equipment operation area requiring a large ground pressure according to the present invention in a predetermined area of the site, the hanging metal fitting 7 and the hook 18 of the lifting machine are used. What is necessary is just to lift it horizontally by using a lifting machine with a wire 19 interposed therebetween, move it to a predetermined position, drop it, and set it.

Further, when removing from the area, the wire 19 may be hung horizontally by a hoist using a wire 19 to be attached to the hanging metal part 7 and carried out.

The block 1 removed from the large equipment operating area requiring a large ground pressure can be moved to another place and reused.

In the case where the range requiring ground curing changes in the same area or an adjacent area, a portable and recyclable block 1 used for a large equipment operating area requiring a large ground pressure is used as a lifting machine. It can be dealt with by using and moving. Also removed block 1
If you want to relocate and reuse the
As shown in FIG. 7, the cargo is loaded on the truck 20 or the trailer, transported to the next use area, and reused.

As an application example of the block 1 in the embodiment of the present invention, in addition to the ground of the operation area of the mobile hoist 2,
A temporary warehouse ground for storing heavy goods, a ground for material storage, a ground for a temporary road, a simple runway, and the like can be considered.

[0078]

According to the first aspect of the present invention, it is possible to easily form and demolish the surface ground by moving each surface ground building block, and to reuse the surface ground building block. Cheap. In addition, when a plurality of surface ground formation blocks are spread and used, the surface ground formation blocks overlap with other surface ground formation blocks all around, so that the stability is increased, and the weight of the mobile hoist etc. is increased. Even when an object is placed, the adjacent surface ground formation blocks are less likely to be displaced in the vertical direction, and a plurality of surface layer ground formation blocks are engaged with each other by the uneven portions , so that it is easy to suppress the displacement in the horizontal direction. As described above, an effect that a normal reinforced ground surface can be maintained even at the boundary between the surface ground formation blocks is obtained.

According to the second aspect of the invention, in addition to the function and effect of the first aspect, the surface layer ground formation block is durable and long-lasting, and the degree of the reuse of the surface layer ground formation block and the strength of the ground can be improved. The effect of being enhanced is obtained.

According to the third aspect of the present invention, in addition to the function and effect of the second aspect of the invention, peeling and warping of the metal plate are reduced, and the effect of making the surface layer ground formation block more durable and long lasting is obtained.

According to the fourth aspect of the present invention, in addition to the effect of any one of the first to third aspects of the present invention, a load applied to a certain surface layer forming block is reduced by an adjacent surface layer. It can be immediately dispersed on the lower overhang of the building block.

[0082]

[0083]

According to the invention of claim 5, the contract from claim 1 is
In addition to the functions and effects of the invention according to any one of the fourth to fourth aspects, a reinforced ground surface having a high flatness can be obtained.

According to the sixth aspect of the present invention, the operation start time of the mobile hoist used for constructing the plant can be advanced, the start time of hanging the plant components can be advanced, and the construction period of the plant can be shortened. The effect which contributes to is obtained.

According to the invention of claim 7 , in addition to the effect of the invention of claim 6 , in addition to the effects of the invention of claim 6 , the plant component products are assembled in large groups before the hanging work, the number of times of hanging is reduced, and the construction time of the plant construction is reduced. The effect of further shortening can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of a work site showing a state of hanging a plant component on a reinforced ground according to the present invention.

FIG. 2 is a perspective view of a surface ground formation block invented by the inventor.

FIG. 3 is a perspective view of a surface ground forming block according to the first embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view of a boundary between surface ground formation blocks when a plurality of surface ground formation blocks are laid down in the embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing a state in which a surface layer ground formation block according to the present invention is installed on the ground at a boundary between surface layer land formation blocks.

FIG. 6 is a perspective view showing a state of laying a surface ground formation block according to the present invention.

FIG. 7 is a perspective view showing a state where a surface layer forming block is loaded on a truck according to the present invention.

[Explanation of symbols]

1: Portable temporary ground block, 2: Mobile lifting machine, 3:
Nuclear power plant component products, 4 ... reinforced concrete,
5 ... iron plate, 6 ... stud dowel, 7 ... hanging bracket, 12 ...
Projections, 13 recesses, 14 lower protrusions, 15 upper protrusions, 16 improved ground, 17 adjustment sand, 18 hooks, 19 wires, 20 trucks.

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Koichi Gota 3-1-1, Sachimachi, Hitachi-shi, Ibaraki Pref. Hitachi, Ltd. Inside the Hitachi Plant (72) Inventor Akinori Tajiri 3-1-1, Sachimachi, Hitachi-shi, Ibaraki No. 1 Hitachi, Ltd. Hitachi Plant (72) Inventor Sakae Ebata 1-1-1, Komachi, Hitachi-shi, Ibaraki Prefecture Hitachi Co., Ltd. Hitachi Plant (72) Inventor Naoto Yoshida 3-chome, Kochi-machi, Hitachi, Ibaraki No. 1-1 Hitachi, Ltd. Hitachi Plant (72) Inventor Keiya Sato 1-114 Uchikanda, Chiyoda-ku, Tokyo Inside Hitachi Plant Construction Co., Ltd. (72) Inventor Tatsuo Makita Uchikanda, Chiyoda-ku, Tokyo 1-1-1-14 Inside Hitachi Plant Construction Co., Ltd. (56) References JP-A-5-125779 (JP, A) JP-A-63-130801 (JP, A) Japanese Utility Model Showa 51-91925 (JP, U) Japanese Utility Model Showa 52-79716 (JP, U) Japanese Patent Publication No. 4-71196 (JP, B2) Japanese Utility Model Showa 25-25556 (JP, Y1) (58) (Int.Cl. ⁷ , DB name) E02D 3/00 E01C 5/00-13/00 G21C 13/00

Claims (7)

(57) [Claims] 1. A surface ground formation block provided on a ground, wherein the surface ground formation block has a lower protruding portion and an upper protruding portion on one side of two opposing sides having a rectangular horizontal cross section. The projection provided has a right angle to the one side,
The other side has a concave portion that engages with the convex portion of the other block at a right angle to the other side,
The entire periphery of the block has an upper or lower overhang having a horizontal and flat surface overlapping each other in the vertical direction with the adjacent block, and the plurality of surface layer ground formation blocks are adjacent blocks. A surface layer ground, wherein the upper overhanging portion and the lower overhanging portion are overlapped, and are laid on the ground in a state where the convex portion and the concave portion of an adjacent block are engaged with each other. 2. The block comprises: a reinforced concrete layer;
The surface ground according to claim 1, further comprising a metal plate provided on an upper surface of the reinforced concrete layer. 3. The reinforced concrete layer according to claim 2, wherein a fixing member attached to said metal plate is embedded in said reinforced concrete layer.
Surface ground . 4. The surface ground according to claim 1, wherein a lower surface of said upper overhang portion and an upper surface of said lower overhang portion are at the same level. 5. The method according to claim 1, wherein the plurality of surface ground formation blocks are laid on sand placed on the ground. Surface ground. 6. Place the mobile crane on surface ground according to any one of claims 1 to 5, a plant by operating the mobile crane thereafter on said surface ground A method of constructing a plant for hanging a component to a predetermined place. 7. A method for constructing a plant according to claim 6, wherein the plant components are assembled in large groups before the hanging operation.