JP3226869B2 - Surface ground formation block, surface ground using the same, and 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.

[0015] A first object of the present invention is to provide a surface ground building block which can be reused, can suppress the mutual displacement in the vertical direction when a plurality of the grounds are installed, and can be easily laid or removed. The second object is to provide a surface layer using the surface layer formation block, and the third object is to provide a plant construction method using the surface layer.

[0016]

A first means for achieving the first object is to form a solidified layer of reinforced concrete on a metal plate.
On the lower side, a block fixed by a member embedded and fixed in the reinforced concrete is provided, and the block is provided with a step portion vertically overlapping with the block adjacent to the peripheral portion, and further horizontally suspends the block. A surface ground formation block characterized in that hanging metal fittings are fixedly or detachably provided at a plurality of positions of the block that can be used.

Similarly, the second means is a surface ground formation block characterized in that the hanging means is provided at a position below the upper surface of the block in the first means.

[0018]

The third means is the same as the first means or the second means , wherein the block is provided with a plurality of horizontal displacement suppressing engaging portions which are engaged with each of the adjacent blocks in a peripheral portion. This is a block for surface ground formation characterized by the following.

A fourth means for attaining the second object is that a plurality of surface ground formation blocks of any one of the first means to the third means are provided on the surface layer of the formation ground, This is a surface ground formed by laying the step portions together in an overlapping manner.

Similarly, the fifth means is the fourth means,
A surface ground in which a horizontal displacement suppressing engagement portion provided on a surface ground forming block of three means and a horizontal displacement suppressing engaging portion provided on another adjacent surface ground forming block are engaged with each other. It is.

The sixth means is the same as the fourth means or the fifth means, wherein the adjustment sand is placed on the surface layer of the formation ground, and a plurality of the surface ground formation blocks are placed above the adjustment sand. It is the surface ground that is laid.

The seventh means for attaining the third object is as follows.
A mobile lifting machine is mounted on the surface ground of any one of the fourth means to the sixth means , and then 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.

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

[0025] According to the first means, the surface ground formation block can be suspended and handled almost horizontally, so that the surface ground formation block can be spread over the ground surface to easily form the surface ground, and the surface ground can be formed easily. Removal is also easy. Also, the surface layer block can be reused. In addition, when the surface ground formation block is laid on the ground surface layer, the adjacent surface ground formation blocks are partially overlapped in the vertical direction, so that the vertical displacement of the surface ground formation block is suppressed. In addition, the load can be smoothly transmitted between the adjacent ground formation blocks. Therefore, even if a mobile lifting machine, which is a heavy object, moves on the surface ground formation block, the weight of the lift machine can be distributed to another adjacent surface ground formation block to be served. can get. Moreover,
The solidified layer of the surface ground preparation block is made of iron concrete.
Reinforcement with streaks to increase strength, and the metal plate
It is firmly fixed to the concrete layer, increasing the overall strength
The effect which makes it do is obtained.

According to the second means, in addition to the operation of the first means, the lifting device is located below the upper surface of the surface ground formation block, and the lifting device does not protrude from the surface after the formation. There is no hindrance to the movement, and the lifting hardware is not damaged by the moving lifting machine, and safe and reliable reuse can be performed.

[0027]

According to the third means, the first means or the second means
In addition to the action of the above, when the blocks are laid on the ground surface and used, the adjacent blocks are engaged by the horizontal displacement suppressing engagement part, so that the mobile lifting machine which is a heavy The effect of suppressing the displacement in the horizontal direction even when moving in the direction is obtained.

According to the fourth means, it is possible to provide a reinforced surface ground by laying out the surface ground formation blocks of any one of the first means to the third means with increased strength, and to provide the surface ground. The effect that the construction block can be easily laid and removed can be obtained. For this reason, the surface ground which can be laid and removed easily can be provided. In addition, since the peripheral step portion of the surface ground formation block is overlapped between the adjacent surface ground formation blocks, it is possible to suppress the adjacent surface ground formation block from shifting vertically.

According to the fifth means, in addition to the function of the fourth means , the horizontal integration of the adjacent surface ground formation blocks can be enhanced by the engagement of the horizontal displacement suppressing engagement portion, and the horizontal direction can be enhanced. Displacement of the ground can be suppressed.

According to the sixth means, in addition to the action of the fourth means or the fifth means , the adjusting 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 degree of flatness between the plurality of blocks, and to obtain the effect of adjusting the amount of sand to flatten the sinking amount between the plurality of blocks. Thereby, an effect of obtaining a flat reinforced ground can be obtained.

According to the seventh means, the surface ground having increased strength
The ground on which the mobile lifting machine is placed using the building block
The mobile lifting machine can be smoothly moved on the surface ground because the reinforcement can be strengthened and the vertical displacement between the adjacent surface ground formation blocks can be suppressed. Since the surface ground preparation block can be laid quickly, the operation start time of the mobile hoist can be advanced. For this reason, the start time of suspension of the plant components is advanced, and an effect that contributes to shortening the construction period of the plant construction can be obtained.

According to the eighth means, in addition to the function and effect of the seventh means , since the ground is strengthened, the total load thereof is strengthened even if the construction hoist lifts a large set of plant components. It can be received on the ground that has been broken, and the work of hanging the plant component products can be achieved without any trouble. Further, since the plant component products are assembled in a large group before the hanging work, the number of times of hanging is small, and an effect of shortening the construction period of the plant construction can be 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 first embodiment of a block 1 based on reinforced concrete.

An iron plate 5 is provided so as to cover the upper surface of the reinforced concrete 4.

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 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.

A lifting metal 7 for transportation is set on the iron plate 5 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.

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

As a second embodiment, the first embodiment is modified, and as shown in FIG. 3, a convex portion in the horizontal direction is formed as a horizontal displacement suppressing engaging portion around a short side facing the block 1. 12 and a recess 13 are provided.

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 that of the first embodiment.

The first embodiment of the block 1 shown in FIG. 2 has a structure in which adjacent blocks are partly vertically overlapped with each other at adjacent portions as shown in FIG. This is an example of the shape of a portable and recyclable block 1 used in a large equipment operation area requiring a large ground pressure for the purpose of suppressing the displacement between the blocks in the 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.

In each of the examples, the surface ground formation block is
Since the upper surface is a metal plate, even if a heavy object is placed thereon, it is hardly damaged, and since it is fixed to the solidified body and integrated, it is hard to be displaced and warped. In addition, the load on the metal plate is transmitted to the solidified body, dispersed and easily transmitted to the existing ground.

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

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

FIGS. 5 and 6 show an example 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.

When 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 the 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 block 1 of the second embodiment shown in FIG. 3 which is portable and recyclable and is used in a large equipment operation area requiring a large ground pressure in the present invention.

In the case of setting the ground in the block 1 of the first embodiment shown in FIG.
The difference is that there is no work of engaging the concave portion 13 with the case of using the block 1 of the second embodiment.

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.

Examples of application of the block 1 in each embodiment of the present invention include a ground for a temporary warehouse for storing heavy goods, a ground for material storage, a ground for a temporary road, a ground for a temporary road, in addition to a ground for an operation area of the mobile lifting machine 2. Runway etc. can be considered.

The block 1 according to any of the embodiments can be used in the manner described above.

[0079]

According to the first aspect of the present invention, the surface ground formation block can be handled substantially horizontally, so that the ground can be laid and removed easily, and the ground can be reused easily. When a plurality of surface ground formation blocks are spread and used, the boundaries between the surface ground formation blocks overlap in the vertical direction, so that it is possible to suppress the displacement of the adjacent surface ground formation blocks in the vertical direction, and at the boundary. The effect of maintaining normal reinforced ground surface , and surface layer
High strength can be expected in the solidified layer of the block for block building
Adopt reinforced concrete, the reinforced concrete and gold
Block for surface ground formation by fixing the metal plate inseparably
Can improve the strength of the ground and improve the strength of the ground
The effect is obtained.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, it is possible to prevent the hanging metal fittings of the surface layer ground formation block from being damaged and to improve safety.

[0081]

According to the invention of claim 3 , claim 1 or
In addition to the effect of the invention of claim 2 , when the surface ground formation blocks are spread and used, an effect of suppressing horizontal displacement between the surface ground formation blocks and maintaining a normal reinforced ground surface is obtained. Can be

According to the fourth aspect of the present invention, the same effects as those of the first aspect are produced.

According to the fifth aspect of the invention, in addition to the effect of the fourth aspect of the present invention, it is possible to prevent the adjacent surface ground formation blocks from being displaced from each other in the horizontal direction.

According to the sixth aspect of the present invention, the fourth aspect or the third aspect
In addition to the effect of the invention according to claim 5 , it is easy to obtain the enhanced flatness of the ground surface.

According to the seventh aspect of the invention, the reinforced ground
Can be provided quickly, and the operation start time of the mobile hoist can be advanced, and the plant construction process can be shortened.

According to the invention of claim 8 , in addition to the effect of the invention of claim 7 , the construction process of the plant can be further shortened.

[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 an enlarged perspective view of a block portion according to a first embodiment of the surface layer formation block shown in FIG. 1;

FIG. 3 is an enlarged perspective view of a surface ground formation block according to a second embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view of a boundary portion between surface ground formation blocks when a plurality of surface ground formation blocks of FIG. 2 are spread.

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 forming 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-2-204507 (JP, A) JP-A-63-130801 (JP, A) JP-A-51-91925 (JP, U) JP-A-48-56827 (JP, U) JP-A-52-7716 (JP, U) JP-A-4-70304 (JP, U) JP 4-71196 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 3/00 E01C 9/08 E02D 27/44

Claims (8)

(57) [Claims] 1. A block in which a solidified layer of reinforced concrete is fixed below a metal plate by a member embedded and fixed in the reinforced concrete, and the block has a step portion vertically overlapping the block adjacent to a peripheral portion. And
Further, a hanging layer is fixedly or detachably provided at a plurality of portions of the block where the block can be hung horizontally. 2. The surface ground forming block according to claim 1, wherein the hanging metal fitting is provided below the upper surface of the block. 3. The surface ground preparation according to claim 1, wherein the block has a plurality of horizontal displacement suppressing engagement portions in the periphery thereof which are engaged with each of the adjacent blocks. block. 4. A plurality of surface ground formation blocks according to any one of claims 1 to 3 are laid on a surface layer of the formation ground in a state in which the stepped portions in a peripheral portion are overlapped. Surface ground consisting of 5. A horizontal displacement suppressing engaging portion provided in the surface ground formation block according to claim 3, wherein:
A surface ground in which horizontal displacement suppressing engagement portions provided on another adjacent surface ground formation block are engaged with each other. 6. The surface ground according to claim 4 or 5, wherein a conditioning sand is placed on a surface portion of the construction ground, and a plurality of said surface formation blocks are spread over the conditioning sand. 7. A plant configuration by mounting a mobile lifting machine on the surface ground according to any one of claims 4 to 6, and thereafter operating the mobile lifting machine on the surface ground. A method of constructing a plant for hanging a product at a predetermined place. 8. The plant construction method according to claim 7, wherein the plant components are assembled in large groups before the hanging operation.