JP4624320B2 - Dust concrete structure - Google Patents

Description

  The present invention relates to an interstitial concrete structure, and more particularly to an interstitial concrete structure using a precast concrete board formed as a standard product having a considerable size.

  In general, soil concrete is laid down on a foundation layer formed by rolling the foundation ground, and a foundation layer formed by laying and crushing foundation crushed stone as appropriate, and a reinforcing steel bar is laid out as appropriate. Thereafter, the ready-mixed concrete is placed and a planar concrete board covering the foundation ground is formed on site (see, for example, cited documents 1 and 2).

In addition, when forming tile floors around the gates of buildings, walking paths from gates to building entrances, etc., a technique using a pre-formed panel member for soil concrete (see, for example, cited document 3), or In building floor construction of buildings and floor construction in parks, etc., a concrete precast floor board with decorative materials such as tiles fixed on the surface is lifted by a crane via a hanging bracket and installed on the foundation provided at the desired location Techniques (see, for example, cited document 4) are also disclosed.
JP-A-11-268947 JP 2002-206281 A Japanese Patent Laid-Open No. 7-301071 JP-A-6-294141

  On the other hand, in the case of simple soil-free concrete that is not decorated with tiles, for example, in a garage or a walkway, ready-mixed concrete was placed on the foundation layer of the ground that was pressed or the foundation layer of the ground foundation crushed stone. It is generally formed by simply finishing the surface later.Such dirt concrete is prone to cracks, uneven color, unevenness, etc. A lot of work and skill will be required for finishing work. In particular, when these soil concrete is formed outdoors, quality control and finishing work in rainy weather are not easy, and the construction period may be postponed depending on the weather. Also, in cold districts, cracks are likely to occur due to the freezing of the base layer, and there are some cases where the construction period must be postponed significantly.

  The present invention has been made paying attention to such a conventional problem, and is easy to perform quality control and finishing work, and can be easily constructed even in rainy weather or in a cold region, and after a short period after construction. An object of the present invention is to provide a soil concrete structure that can be used as soil concrete.

The present invention has a square or rectangular planar shape with a side length of 600 to 1500 mm, and is a precast concrete formed as a standard product having hollow recesses at portions other than at least four corners of the bottom surface. It is a soil-concrete structure constructed by arranging a plurality of panels arranged vertically and horizontally on the upper surface of the foundation layer, and the height adjustment is performed at the position where the corner of the precast concrete board is disposed on the foundation layer. The plate is installed in a state where the lower layer portion is embedded in the base layer and the top surface is disposed slightly above the laying surface of the base layer, and the corner of the precast concrete board is placed on the height adjustment plate. by mounting the, by providing a dirt floor concrete structure where the precast concrete plate is positioned, which has achieved the above objects That.

  According to the soil concrete structure of the present invention, the base layer is preferably formed of a crushed stone layer.

  Moreover, according to the soil concrete structure of the present invention, the base layer is preferably formed by laying mortar on the upper surface of the crushed stone layer.

  Furthermore, according to the soil concrete structure of the present invention, the height adjusting plate is installed at a position where the corners of the four precast concrete boards are gathered, and the four precasts are placed on the height adjusting plate. The corners of the concrete board are preferably installed.

  And according to the soil concrete structure of the present invention, bolt fastening holes are provided at the four corners of the precast concrete board, and lifting metal fittings are fastened to the bolt fastening holes, It is preferable that the precast concrete board can be lifted by a lifting heavy machine.

  According to the soil concrete structure of the present invention, quality control and finishing work are easy, and it can be easily constructed even in rainy weather or in cold regions, and can be used as soil concrete in a short period after construction. be able to.

  As shown in FIG. 1, the soil concrete structure 10 according to a preferred embodiment of the present invention is employed when, for example, a floor surface portion made of soil concrete is formed in a garage 12 provided facing a road 11. is there. In other words, the garage 12 is provided outdoors, and when concrete is cast on the ground to form soil concrete, the construction period is likely to be delayed due to the weather during work, etc., and cracks and colors are not appropriate if quality control is not appropriate. Unevenness and unevenness are likely to occur. The soil concrete structure 10 of the present embodiment uses a precast concrete board 13 formed in advance as a standard product in a factory or the like, as shown in FIGS. It was adopted to make it easy to construct soil concrete while facilitating work and avoiding the effects of weather and freezing, especially in cold regions.

  The dirt concrete structure 10 of the present embodiment has a square planar shape with a side length L of, for example, 950 mm, and includes a hollow recess 14 in a portion excluding at least four corners 13a on the bottom surface. As shown in FIG. 3, a plurality of precast concrete boards 13 formed as standard products are arranged side by side on the upper surface of the base layer 15.

  In the present embodiment, the base layer 15 is preliminarily provided with height adjustment plates 16 at positions where the corners 13a of the precast concrete board 13 are disposed, and these height adjustment plates 16 are provided with precast concrete. By installing the corner 13a of the board 13, the precast concrete board 13 is positioned.

  In the present embodiment, the precast concrete board 13 is a reinforced concrete product that is mass-produced in advance as a standard product in a factory or the like. Preferably, the length L of one side is, for example, 950 mm corresponding to one module of a residential building section. It has a square planar shape and is formed with a height H of, for example, 100 mm. Moreover, the precast concrete board 13 is formed so that the top surface may become a flat surface, and the periphery of the top surface is a chamfered portion 13b having a curved shape. Furthermore, the precast concrete board 13 has a hollow recess 14 having a depth D of 40 mm, for example, in a portion excluding the corner 13a on the bottom surface and the peripheral edge 13c having a width B of 100 mm, for example.

Here, in the present invention, the precast concrete board 13 has a square or rectangular planar shape having a side length of 600 to 1500 mm, preferably 700 to 1200 mm, particularly preferably 800 to 1000 mm. . If the size of the square or rectangular precast concrete board 13 is too small, the workability such as unevenness adjustment at the time of installation becomes disadvantageous, and the joint decoration for improving the design of the joint will increase. If the size of the precast concrete board 13 is too large, it will take time to carry and carry in construction in a narrow area, and the dimensions of the end when considering the combination within a predetermined space The disadvantage is that the adjustment is disadvantageous.

In addition, the precast concrete board 13 has a weight of, for example, about 100 to 200 kg by pouring concrete and curing it after arranging reinforcing bars 21 ( see FIG. 8 ) in a mold in a factory or the like . Easy to form. The precast concrete board 13 can be easily mass-produced, thereby reducing the manufacturing cost.

  Furthermore, in this embodiment, bolt fastening holes 17 are provided in the four corner portions 13a of the precast concrete board 13 by embedding insert nuts, for example. As shown in FIG. 4 (a), a lifting bracket 18 such as an eyebolt is detachably fastened to the bolt fastening hole 17, and as shown in FIG. 5, a lifting heavy machine such as a unic, crane, or tow truck is used. It can be made the state which can be lifted by 19. Accordingly, it is possible to easily carry out the work of transporting the precast concrete board 13 or installing the precast concrete board 13 at a predetermined position of the base layer 15 using the lifting heavy machine 19.

  In the present embodiment, since the precast concrete board 13 has a weight of, for example, about 100 to 200 kg, the installation work of the precast concrete board 13 can be performed by, for example, about four people. . Moreover, as shown in FIG. 4A, the bolt fastening hole 17 has a two-stage structure in which the inner diameter of the upper part opened to the top surface side of the precast concrete board 13 is enlarged. After the precast concrete board 13 is installed at a predetermined position of the base layer 15 and the lifting bracket 18 is removed from the bolt fastening hole 17, for example, the rubber bolt 20 having an enlarged head 20a shown in FIG. As shown in FIG. 6, the bolt fastening hole 17 is closed by screwing the head 20 a into the bolt fastening hole 17 and screwing it into the bolt fastening hole 17.

  In the present embodiment, the base layer 15 shown in FIG. 3 in which the precast concrete boards 13 are installed in the vertical and horizontal directions is formed by a crushed stone layer that has been laid and smoothed with a thickness of, for example, about 70 to 150 mm. That is, after the foundation ground of the part where the garage 12 is to be formed is newly put in and earthed appropriately, and then crushed stone is further put in and the foundation layer 15 having sufficient support strength is formed. The Further, the base layer 15 can be formed by further laying mortar on the upper surface of the crushed stone layer.

  The height adjustment plate 16 installed on the base layer 15 before installation of the precast concrete board 13 is made of a steel plate having a thickness of about 20 to 40 mm, for example, and preferably has a side length of about 200 to 300 mm. Processed into a square. A nail hole 16a is formed in the center of the height adjusting plate 16, and as shown in FIG. 7, a fixed nail 22 is driven toward the base layer 15 through the nail hole 16a. The height adjustment plate 16 is firmly fixed and fixed at a predetermined position of the base layer 15. Further, a plurality of height adjusting plates 16 can be installed in a stacked state, and the installation height of the precast concrete board 13 can be appropriately adjusted by increasing / decreasing the number of stacked plates. In the present embodiment, the stacked height adjustment plates 16 are embedded in the base layer 15, with the top surface disposed slightly above the laying surface of the base layer 15 while the lower layer portion is embedded in the base layer 15. Installed.

  And according to this embodiment, the precast concrete board 13 carried in to the vicinity of the garage 12 is lifted one by one using the lifting heavy machine 19 or lifted by human power, and as shown in FIG. Are sequentially installed at predetermined positions while being respectively placed on the height adjustment plate 16 previously installed on the base layer 15. As a result, a plurality of precast concrete boards 13 are arranged on the upper surface of the base layer 15 side by side while holding the joint portions 23 with an interval of about 30 to 100 mm, for example, and the soil concrete structure 10 of this embodiment is formed. Is done.

  Here, in the present embodiment, most of the height adjustment plates 16 are installed at intersections of crosses where the corner portions 13a of the four precast concrete boards 13 are gathered. The corner 13a of the body precast concrete board 13 is installed at the same time. This makes it possible to easily align the height of the top surfaces of the plurality of precast concrete boards 13 arranged side by side in the vertical and horizontal directions. Moreover, in this embodiment, the corner | angular part 13a of the precast concrete board 13 is preferably fixed to the height adjustment plate 16 only by installation to the height adjustment plate 16, or using a fixing bracket etc. as needed. As a result, the precast concrete board 13 is positioned and fixed at a predetermined position with high accuracy.

  When a plurality of precast concrete boards 13 are installed vertically and horizontally on the upper surface of the base layer 15 (see FIG. 1), the joints 23 arranged in a lattice pattern between the adjacent precast concrete boards 13 are, for example, grass joints or bricks. Apply joints. Further, for example, crushed stone, sand, mortar or the like is spread on the side portion 25 of the garage 12 along the boundary wall 24 with the neighbor. Further, for example, when there is a considerable difference in height between the road 11 and the garage 12, the sloped portion 26 on the front side of the garage 12, which is a rubbing portion with the road 11, Spread interlocking etc. which are long or square floor blocks. By these, the garage 12 in which the floor surface part by the soil concrete is constituted by the soil concrete structure 10 of the present embodiment is formed.

  And according to the soil concrete structure 10 of this embodiment, quality control and finishing work are easy, and it can be easily constructed even in rainy weather or cold regions, and can be used as soil concrete in a short period after construction. It can be in a state. That is, the soil concrete structure 10 of the present embodiment has a plurality of precast concrete boards 13 formed as standard products having a square plane shape of a considerable size and having a hollow recess 14 on the bottom surface. 15 are arranged side by side vertically and horizontally on the top surface of 15. Therefore, the precast concrete board 13 is manufactured while easily performing appropriate quality control in a factory or the like, and can be formed with high quality with high accuracy in a state where the surface finish is applied, and the precast concrete board carried into the construction site. It is possible to easily form the soil concrete by a simple construction method in which 13 is arranged in the vertical and horizontal directions on the upper surface of the base layer 15, thereby shortening the construction period.

  Also, since the soil concrete is formed by so-called dry construction in which the precast concrete board 13 formed in advance is laid and placed on the upper surface of the base layer 15, it is not affected greatly by the weather, etc., and it is easy even in rainy weather or cold areas Since the use of the precast concrete board 13 eliminates the need for curing the concrete at the construction site, it can be used as soil concrete in a short period after construction.

  Furthermore, since the precast concrete board 13 is provided with the hollow recessed part 14 in the bottom face, even if the base layer 15 expand | swells by freezing, this can be absorbed by the hollow recessed part 14, and a crack etc. are carried out to soil concrete. It is possible to more effectively avoid the occurrence. Therefore, the interstitial concrete structure 10 of the present embodiment can be effectively employed particularly in cold regions such as the northern Japan region and the northern part of the Sea of Japan.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the precast concrete board does not necessarily have a square planar shape, and may have a rectangular planar shape. Further, the hollow concave portion provided on the bottom surface of the precast concrete board does not necessarily need to be a hollow concave portion that is continuous over the whole. For example, as shown in FIG. It is also possible to provide reinforcing ribs 27 that traverse the recessed portions 14 ′ vertically and horizontally, and the hollow recessed portions 14 ′ are divided by these reinforcing ribs 27. Further, a backfill material can be appropriately injected into the hollow recess after installation on the base layer. Furthermore, the interstitial concrete structure of the present invention can be used to form other various interstitial concrete such as interstitial concrete on the floor surface of the passage, as well as interstitial concrete on the floor surface of the garage.

1 is a schematic plan view showing a garage in which soil concrete on a floor surface is formed by a soil concrete structure according to a preferred embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS (a) of the precast concrete board used for the soil concrete structure which concerns on preferable one Embodiment of this invention is a top view, (b) is a bottom view, (c) is sectional drawing along AA of (a). . BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic perspective view explaining the structure of the soil concrete structure which concerns on preferable one Embodiment of this invention. (A) is explanatory drawing of the condition which fastens a lifting metal fitting to the bolt fastening hole of a precast concrete board, (b) is a perspective view of the rubber bolt with which a bolt fastening hole is mounted | worn. It is explanatory drawing of the condition which lifts a precast concrete board with a lifting heavy machine. It is a perspective view of the precast concrete board which attached the rubber bolt to the bolt fastening hole. It is sectional drawing which shows the state which fixed and fixed the height adjustment plate to the base layer. It is a partially broken perspective view which illustrates other forms of a precast concrete board.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Concrete structure 12 Garage 13 Precast concrete board 13a Corner 14 of a precast concrete board Hollow hollow part 15 Base layer 16 Height adjustment plate 17 Bolt fastening hole 18 Lifting metal fitting 19 Lifting heavy machine 20 Rubber bolt 21 Reinforcing bar 22 fixation Nail 23 joint

Claims (5)

A precast concrete board having a square or rectangular plane shape with a side length of 600 to 1500 mm and having a hollow recess in a portion excluding at least four corners of the bottom surface as a standard product. It is a soil-concrete concrete structure that is configured by arranging multiple layers side by side on the upper surface of the layer,
In the base layer, the height adjusting plate is embedded in the base layer at the position where the corner of the precast concrete board is disposed, and the top surface is slightly smaller than the laying surface of the base layer. An earth-concrete concrete structure which is installed in a state where it is disposed above, and in which the precast concrete board is positioned by installing corners of the precast concrete board on the height adjustment plate.   The soil concrete structure according to claim 1, wherein the base layer is formed of a crushed stone layer.   The soil concrete structure according to claim 2, wherein the base layer is formed by laying mortar on an upper surface of the crushed stone layer.   The height adjustment plate is installed at a position where the corners of the four precast concrete boards are gathered, and the corners of the four precast concrete boards are installed on the height adjustment plate. The soil concrete structure according to any one of the above. Bolt fastening holes are provided at four corners of the precast concrete board, and a lifting metal fitting is fastened to the bolt fastening hole so that the precast concrete board can be lifted by a lifting heavy machine. Item 5. The soil concrete structure according to any one of Items 1 to 4 .

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