JP7016106B2 - Lightweight embankment structure and how to build a lightweight embankment - Google Patents

Description

The present invention relates to a lightweight embankment structure in which the labor required for installing a formwork for a concrete deck is reduced, and a method for constructing a lightweight embankment.

In recent years, lightweight polystyrene has been constructed by the expanded polystyrene construction method (also referred to as the EPS method). In this method, a lightweight embankment structure can be formed by stacking a large number of blocks (also referred to as EPS blocks) made of expanded polystyrene (expanded polystyrene) having a size of, for example, 2000 × 1000 × 500 mm.

In the lightweight embankment structure formed by stacking a large number of the above blocks, concrete with a thickness of 150 mm is generally used at the top of each block stack height of 3 m for rectification. Installation of floor slabs is stipulated in industry standards. Generally, in order to install a concrete deck, H-shaped steel for installing wall material is installed, blocks are piled up, and then H-shaped steel is used to make a wooden frame material (formwork) as shown in FIG. The formwork structure for concrete floor slabs is fixed with a frame material such as plywood), a reinforced wire net is installed on the block, and the formwork structure is fixed using a fixing jig such as a binding wire or a separator. Concrete is placed in the concrete and hardened, and after hardening, the formwork structure is dismantled.

However, it is very difficult to install the formwork on the styrofoam block using a fixing member such as a nail and to disassemble the formwork. Specifically, the work of installing a formwork that can withstand the placing pressure of concrete and the work of dismantling the formwork in a place where space is limited are work on a block made of Styrofoam. It is very difficult because the fixing member is difficult to be sufficiently fixed and the feet are unstable. In addition, as the stacking height of the blocks increases, it may be necessary to install long columns to support the formwork or to build a separate scaffolding to build the formwork. The number of parts will also increase.

Therefore, there is a demand for a method that can easily install the formwork of the concrete deck. For example, Patent Document 1 describes a construction method in which a concrete deck slab is installed by providing a dam portion at an end surface portion of a block located on the wall surface side and using the dam portion as a formwork.

Japanese Unexamined Patent Publication No. 11-172676 (published on June 29, 1999)

However, in the method for constructing a concrete deck described in Patent Document 1, concrete cannot be placed up to the tip of the block on the wall surface side. That is, there is a problem that the concrete deck cannot be installed on the entire surface of the block.

Further, in recent years, a block for embankment construction (integrated with the wall material) on which the wall material can be directly installed on the block is often constructed without using H-shaped steel. However, even in the construction method using the block, the formwork is installed on the styrofoam block by using a fixing member such as a nail, as in the method of constructing the concrete deck described in Patent Document 1. It is very difficult to dismantle the formwork.

Therefore, a method in which a formwork for installing a concrete deck can be easily installed on the entire surface of the block, that is, a block for building a filling (integrated with the wall material) in which the wall material can be directly installed. There is a need for a method for constructing a lightweight embankment that can reduce the time and effort required to install the formwork for concrete floor slabs.

As a result of diligent studies by the inventors to solve the above problems, the formwork has an L-shaped cross section including a standing portion having a height equal to the thickness of the concrete deck to be formed and a bottom plate portion. After fixing the buried formwork material on the foamed resin block using the buried formwork material of the above, concrete floor slab formwork is placed so that the thickness is equal to the height of the erection site. We have found that it is possible to provide a lightweight formwork structure and a method for constructing a lightweight formwork with reduced installation time, and have completed the present invention.

That is, the present invention includes the inventions described in the following [1] to [9].

[1] A method for constructing a lightweight embankment including a step of forming a concrete deck on a foamed resin block, in which a standing portion having a height equal to the thickness of the concrete deck to be formed and an average thickness of concrete are used. After fixing an embedded formwork material having an L-shaped cross section on a foamed resin block, which has a bottom plate portion that is 30% or less of the thickness of the deck, the thickness becomes equal to the height of the standing portion. A method of constructing a lightweight formwork, which is characterized by placing concrete in the same way.

[2] The embedded formwork material has a plurality of holes in the bottom plate portion, and the embedded formwork material is fixed on the foamed resin block by inserting a rod-shaped fixing member into the holes [2]. 1] The method for constructing a lightweight embankment.

[3] The method for constructing a lightweight embankment according to [2], wherein the fixing member has a diameter of 6 mm or more.

[4] The method for constructing a lightweight embankment according to any one of [1] to [3], wherein the length of the buried formwork is 3 to 15 times the thickness of the concrete deck. ..

[5] The buried formwork is characterized in that the length of the bottom plate portion is gradually shortened from the joint portion with the erection portion toward the tip portion [1] to. The method for constructing a lightweight embankment according to any one of [4].

[6] The method for constructing a lightweight embankment according to any one of [1] to [5], wherein the buried formwork material is formed of fiber reinforced cement.

[7] The method for constructing a lightweight embankment according to any one of [1] to [6], wherein the cushioning material is installed on the foamed resin block and then the buried formwork material is installed.

[8] It is a lightweight filling structure in which a concrete floor slab is formed on a foamed resin block, and is provided with a buried formwork material which is a frame material of the concrete floor slab to be cast, and the above-mentioned buried formwork material has a cross section. It is L-shaped and has a standing part having a height equal to the thickness of the concrete slab and a bottom plate part having an average thickness of 30% or less of the thickness of the concrete slab, and is provided on a foamed resin block. Lightweight filling structure characterized by being fixed.

[9] It has a raised structure in which a concrete floor slab is formed on a foamed resin block, and includes a buried formwork material which is a frame material of the concrete floor slab to be cast. The buried formwork material has an L cross section. It has an upright part that is shaped like a shape and has a height equal to the thickness of the concrete slab, and a bottom plate part whose average thickness is 30% or less of the thickness of the concrete slab, and is fixed on the foam resin block. A raised structure characterized by being concrete.

According to one aspect of the present invention, the buried formwork material having an L-shaped cross section including an upright portion having a height equal to the thickness of the concrete deck to be formed and a bottom plate portion is used. After fixing the frame material on the foamed resin block, concrete is poured so that the thickness is equal to the height of the upright part. Therefore, the formwork for installing the concrete deck can be easily installed on the entire surface of the block, and it is not necessary to disassemble the formwork after forming the concrete deck. Then, a concrete deck integrated with the buried formwork can be installed on the entire surface of the block.

Therefore, a lightweight embankment structure that can be used for blocks for embankment construction (integrated with the wall material) on which wall materials can be directly installed and can reduce the time and effort required to install the concrete floor slab formwork. And can provide a method of constructing a lightweight embankment. That is, it is possible to provide an effect that a lightweight embankment structure having excellent workability, a shortening of the construction period and a cost reduction, and a method for constructing the lightweight embankment can be provided.

Of the buried formwork material used in the method for constructing a lightweight embankment according to an embodiment of the present invention, (a) is a plan view, (b) is a front view, (c) is a side view, and (d) is required. It is a top view which shows the part enlarged. It is a schematic partial cross-sectional view which shows an example of the lightweight embankment structure using the said buried formwork material. It is sectional drawing of the main part which shows an example of the lightweight embankment structure using the said buried formwork material. It is sectional drawing of the main part which shows another example of the lightweight embankment structure using the said buried formwork material. It is a schematic cross-sectional view which shows still another example of the lightweight embankment structure using the said buried formwork material. It is sectional drawing of the main part which shows an example of the conventional lightweight embankment structure.

Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited to this, and various modifications can be made within the scope described, and the present invention also relates to an embodiment obtained by appropriately combining the technical means disclosed in different embodiments. Included in the technical scope of. Unless otherwise specified in the present specification, "A to B" representing a numerical range means "A or more and B or less". Also, "mass" and "weight" are considered to be synonyms.

The method for constructing a lightweight embankment according to an embodiment of the present invention is a method for constructing a lightweight embankment including a step of forming a concrete deck on a foamed resin block, and has a height equal to the thickness of the concrete deck to be formed. After fixing the buried formwork material having an L-shaped cross section with the upright part having a ridge and the bottom plate part on the foamed resin block, concrete is made so that the thickness is equal to the height of the upright part. It is a method of placing.

Further, the lightweight filling structure according to the embodiment of the present invention is a lightweight filling structure in which a concrete deck is formed on a foamed resin block, and is a buried formwork which is a frame material of the concrete deck to be cast. The buried formwork material is provided with a material, and the buried formwork material has an L-shaped cross section, has an upright portion having a height equal to the thickness of a concrete deck, and a bottom plate portion, and is fixed on a foamed resin block. It is a configuration that exists.

[Buried formwork material]
The buried formwork material according to an embodiment of the present invention is a formwork for forming a concrete deck on a foamed resin block. As shown in FIG. 1, the buried formwork 1 includes an upright portion 2 having a height equal to the thickness of the concrete deck to be formed, and a bottom plate portion 3, and has a cross section (upright portion 2 and an upright portion 2 and a bottom plate portion 3). The cross section passing through the bottom plate portion 3) is L-shaped.

As the material of the buried formwork material 1, fiber reinforced concrete is suitable because it can be made thinner and lighter than concrete that is not reinforced with fibers. Examples of the reinforcing fiber include glass fiber, polyester fiber, vinylon fiber, polyaramid fiber, polyamide fiber, polyethylene fiber, polypropylene fiber, polyacrylic fiber, polyurethane fiber and the like. Of these, glass fiber is more preferable. Therefore, as the buried mold material 1, specifically, a fiber reinforced concrete plate formed of fiber reinforced concrete is more preferable, and a fiber reinforced concrete plate formed of glass fiber reinforced concrete (GRC) is more preferable. Is particularly preferable. The type of concrete (cement) constituting the fiber reinforced concrete is not particularly limited, but has a physical property value as close as possible to the physical property value of the concrete to be a concrete deck in order to achieve better integrity. More preferably, it is concrete. In addition, since fiber reinforced concrete is denser than general concrete, it can be expected to have the effect of suppressing the neutralization of concrete, and it sufficiently functions as a part of the reinforcing bar cover. Furthermore, fiber reinforced concrete has a strength that is hard to break even if it is accidentally hit with a hammer. If a steel material (steel plate) is used as the material of the buried formwork material 1, it is difficult to reduce the weight, and if plastic is used, the weather resistance is inferior.

The buried formwork material 1 can be produced at a factory. That is, the buried formwork material 1 does not need to be produced at the time of constructing the lightweight filling, and can be produced in advance (prepared as a precast product). Further, since the buried formwork material 1 can be produced at a factory, it is possible to prevent a junker (improper placement) from occurring on the surface of the buried formwork material 1, and a beautiful finish can be obtained. Since the buried formwork material 1 can be produced at a factory, a design can be easily formed on the wall surface side.

Fiber reinforced concrete generally has a bending strength of 10.0 N / mm ² to 30.0 N / mm ² and a compressive strength of 50 N / mm ² or more. Cutting of fiber reinforced concrete can be performed using a diamond cutter. Therefore, the buried formwork material 1 can be processed on-site as needed so as to be able to correspond to the shape of the lightweight formwork (inclined portion, etc.).

The height h of the upright portion 2 of the buried formwork 1 ((b), (c) in FIG. 1) is 150 mm, which is a height equal to the thickness of the concrete deck to be formed, or the said. It is preferable that the height is equal to the thickness of the concrete deck plus the length (about 20 mm) required for blindfolding the joint portions formed in the upper and lower portions of the buried formwork material 1. That is, the height h of the upright portion 2 of the buried formwork 1 is preferably 150 mm, or is preferably about 170 mm when the joint portion is to be blindfolded. In addition, in this specification, the wording "height equal to the thickness of the concrete deck" means the height considered to be substantially equal to the thickness of the concrete deck in construction, and further, the blindfold of the joint portion. Includes height plus length that can be done.

The width w of the bottom plate portion 3 of the buried formwork material 1 ((a), (c) in FIG. 1) may be a width that can withstand the placing pressure of concrete, and is not particularly limited. However, about 150 mm is preferable. The average thickness t ((b), (c) of FIG. 1) of the bottom plate portion 3 of the buried formwork material 1 is 30% (45 mm) or less of the thickness of the concrete deck to be formed. If the average thickness t of the bottom plate portion 3 exceeds 30% of the thickness of the concrete deck, the buried formwork 1 becomes heavy, and it becomes necessary to use a heavy machine, or concrete aggregate is formed on the upper part of the bottom plate portion 3. It may not be filled or it may be difficult to transport and install it manually.

It is desirable that the bottom plate portion 3 of the buried formwork 1 is heavier than the upright portion 2 so that the buried formwork 1 is stable when installed on the foamed resin block. Therefore, it is preferable that the average thickness t'of the upright portion 2 of the buried formwork 1 ((a) and (c) in FIG. 1) is thinner than the average thickness t of the bottom plate portion 3. That is, the average thickness t of the bottom plate portion 3 is preferably a thickness equal to or greater than the average thickness t'of the upright portion 2. As a result, the center of gravity of the buried formwork 1 is lowered, so that the buried formwork 1 can be stably fixed on the foamed resin block. However, when the width w of the bottom plate portion 3 is sufficiently wider than the height h of the upright portion 2, the buried formwork 1 is likely to be stable when installed on the foamed resin block, so that it is buried. The average thickness t'of the upright portion 2 of the formwork material 1 may be thicker than the average thickness t of the bottom plate portion 3. The erection portion 2 may be formed so that the thickness gradually decreases from the bottom plate portion 3 side (joining portion) toward the tip portion.

The length l of the buried formwork 1 ((a), (b) in FIG. 1) is not particularly limited, but is 3 to 15 times the thickness of the concrete deck, that is, 450 mm. It is preferably about 2250 mm, and more preferably about 1000 mm so that the buried formwork 1 can be easily transported by human power. If the length l of the buried formwork 1 is less than three times, the joint treatment on the wall surface side and the fixing work by the fixing member 9 (FIG. 3) may be troublesome. If the length l of the buried formwork 1 exceeds 15 times, the buried formwork 1 may become too heavy and it may be difficult to carry it manually, and the shape of the lightweight embankment (curved part, inclined part, etc.) ), It becomes easy to need to process the buried formwork material 1 on site. The weight of the buried formwork 1 is about 8 kg with a length of 1000 mm.

The embedded formwork 1 may be formed with a so-called taper in the bottom plate portion 3 so that the length thereof gradually decreases from the standing portion 2 side (joining portion) toward the tip portion. That is, the length l'((a) of FIG. 1) of the tip portion of the bottom plate portion 3 may be several mm shorter than the length l of the embedded formwork member 1. More specifically, as shown in FIG. 1D, for example, two buried formwork members 1 having a width w of the bottom plate portion 3 of 148 mm are arranged so that the standing portion 2 side is linear. In the case, the length l'((a) of FIG. 1) of the tip portion of the bottom plate portion 3 is such that a gap of, for example, 3.4 mm is left between the tip portions of the bottom plate portions 3 adjacent to each other. It may be 3.4 mm shorter than the length l of the buried formwork material 1. By forming a taper on the bottom plate portion 3 of the buried formwork material 1, it is possible to construct a lightweight embankment structure corresponding to a curved portion of the lightweight embankment. The degree of the taper is preferably about 1 to 2 ° so that it can correspond to a curved portion of about 30R, but it may be appropriately determined according to the curved portion of the construction site of the lightweight embankment structure. Not specified.

In the buried formwork material 1, so-called R processing is applied to the joint portion between the upright portion 2 and the bottom plate portion 3 so that stress is not concentrated on a part thereof, and safety during work is taken into consideration. The corners may be chamfered.

Further, the buried formwork 1 has a plurality of holes 4 into which a rod-shaped fixing member 9 (FIG. 3) for fixing the buried formwork 1 on the foamed resin block is inserted into the bottom plate portion 3, if necessary. Have. The number of the holes 4 may be a plurality, but the buried formwork 1 can be stably fixed on the foamed resin block, and can correspond to the shape of a lightweight embankment (curved portion, inclined portion, etc.). Assuming that the work is to be performed on-site, 3 or more are preferable, 5 or more are more preferable, and about 10 is optimal. As shown in FIG. 1A, the arrangement of the holes 4 in the bottom plate portion 3 is preferably a position symmetrical in the length direction of the embedded formwork member 1. FIG. 1 is an example of an arrangement when the number of holes 4 is 10. The diameter of the hole 4 may be set according to the diameter of the fixing member 9, and is not particularly limited, but is preferably about 6 mm to 15 mm.

The buried formwork 1 does not have to have a hole 4 in the bottom plate portion 3. When the buried formwork 1 does not have a hole 4 in the bottom plate portion 3, the buried formwork 1 presses the tip portion of the bottom plate portion 3 with an L-shaped fixing member and is placed on the foamed resin block. It should be fixed.

[Fixing member]
As shown in FIG. 3, the embedded formwork 1 is fixed on the foamed resin block 10 by inserting the fixing member 9 into the hole 4 of the bottom plate portion 3 and piercing the foamed resin block 10. One of the rod-shaped fixing members 9 has a sharp tip so that it can easily pierce the foamed resin block 10, and the other tip bulges so that the embedded formwork 1 can be held. More preferably, the rod-shaped fixing member 9 has an L-shape with the other end portion bent. As the material of the fixing member 9, a steel material is suitable. The length of the fixing member 9 (the length inserted into the hole 4) is 150 mm to 300 mm, preferably about 200 mm, although it depends on the number of the fixing members 9 for fixing one embedded formwork member 1. .. Alternatively, the length is preferably about twice as long as the thickness of the concrete deck. The cross-sectional shape of the fixing member 9 may be a circle, or a polygon such as a triangle, a square, or a hexagon, but the cross-sectional shape is not particularly limited. The diameter of the fixing member 9 (diameter when the cross-sectional shape is round, maximum diameter when the cross-sectional shape is polygonal) is set in order to obtain pull-out resistance and shear resistance in a state of being pierced into the foamed resin block 10. It is preferably 6 mm or more. If the diameter is less than 6 mm, it becomes necessary to extremely increase the number of fixing members 9 (and the number of holes 4) used for fixing.

The number of the fixing members 9 may be a plurality, but two or more are preferable, and three or more are more preferable so that the embedded formwork 1 can be stably fixed on the foamed resin block. About 5 is the most suitable. Therefore, the fixing member 9 is not inserted into all of the plurality of holes 4 provided in the bottom plate portion 3 of the buried formwork material 1, but the fixing member 9 stabilizes the buried formwork material 1 on the foamed resin block. Of the plurality of holes 4 provided, the holes 4 suitable for fixing are selected and inserted so that the holes 4 can be fixed.

[Effervescent resin block]
As shown in FIGS. 2 and 3, the foamed resin block 10 is a block made of expanded polystyrene (expanded polystyrene) having a weight of about 1/100 of the same volume of earth and sand (also referred to as an EPS block), and can be stacked in large numbers. This makes it possible to form an embankment. In FIG. 2, as the foamed resin block 10, a foamed resin block on which the wall surface material can be directly installed (integrated with the wall surface material) is given as an example. Further, the foamed resin block 10 is commercially available as a standard product having various dimensions such as 2000 × 1000 × 500 mm. The foamed resin block 10 can be easily transported and constructed by human power.

[Wall material]
As shown in FIGS. 2 and 3, the wall surface material 20 is a flat plate-shaped member fixed to the wall surface side of the foamed resin block 10 and has a function of enhancing the durability and weather resistance of the lightweight embankment. As the material of the wall surface material 20, high strength is required, so fiber reinforced concrete is suitable. The wall material 20 can be produced at a factory. That is, the wall surface material 20 does not need to be produced at the time of constructing the lightweight filling, and can be produced in advance (prepared as a precast product). Since the wall surface material 20 can be produced at a factory, a design can be easily formed on the wall surface side.

[How to build a lightweight fill]
As shown in FIGS. 2 and 3, the method for constructing a lightweight embankment according to an embodiment of the present invention is a method for constructing a lightweight embankment including a step of forming a concrete deck 12 on a foamed resin block 10. This is a method in which the buried formwork 1 is fixed on the foamed resin block 10 and then concrete is poured so as to have a thickness equal to the height of the upright portion 2. Hereinafter, one step of the method for constructing a lightweight fill will be described in order.

First, the foundation such as the ground on which the lightweight embankment is constructed is leveled so that the foamed resin blocks 10 can be arranged horizontally (ground leveling process).

Next, as shown in FIG. 2, when foaming resin blocks 10 are arranged horizontally without gaps on a leveled foundation and a lightweight embankment having a height of more than 3 m is constructed, foamed resin is used until the stacked height reaches 3 m. Stacking blocks 10 (block stacking process). The foamed resin blocks 10 are fixed to each other by being connected to each other by using a binding metal fitting 11 (only one is shown in FIG. 2 for simplification) so as not to be displaced from each other. Further, in order to fill the gap between the foamed resin block 10 and the foundation such as the ground (inclined surface), the backing material 13 is filled.

When the stacked height of the foamed resin blocks 10 reaches 3 m, as shown in FIG. 3, the embedded formwork 1 is fixed on the uppermost foamed resin block 10 on the wall surface side by using the fixing member 9. (Buried formwork fixing process). That is, the embedded formwork 1 is fixed on the foamed resin block 10 by inserting the fixing member 9 into the hole 4. Since the erection part 2 of the buried formwork 1 is exposed in the lightweight embankment after construction, the buried formwork 1 is placed on the wall surface side of the foamed resin block 10 so as to be flush with the wall surface material 20. Fix it so that it sticks out. Further, at the time of fixing, the cushioning material 14 is installed on the foamed resin block 10, and then the buried formwork material 1 is installed. The cushioning material 14 has a function as a so-called packing, and prevents so-called slag leakage when concrete is poured. Further, when a step is generated between the stacked foam resin blocks 10 and a gap is generated between the embedded formwork material 1 and the foam resin block 10, the cushioning material 14 is used as a filler for filling the step. Also works. The cushioning material 14 may be omitted if there is no problem of leakage of glue or if there is no step between the stacked foam resin blocks 10. Further, the cushioning material 14 can be fixed in advance under the buried formwork material 1.

Since the buried formwork material 1 can be easily transported and constructed by human power, it is not necessary to use heavy machinery. Since it is not necessary to use heavy machinery, a worker (skilled worker) having special skills such as crane operation and slinging is not particularly required. In addition, it is possible to construct lightweight embankments even at sites where it is difficult for heavy machinery to enter.

Next, as shown in FIG. 3, a reinforcing bar wire mesh 15 which is a reinforcing member of the concrete deck 12 is arranged on the foamed resin block 10 at the uppermost stage. That is, bar arrangement is performed (bar arrangement process). For the reinforcement arrangement, in consideration of the reinforcing bar cover, a plurality of tables (not shown) of several tens of mm, for example, 40 mm are regularly arranged on the foamed resin block 10, and the reinforcing bar wire mesh 15 is placed on the table. Do by. The buried formwork 1 is fixed to the foamed resin block 10, and it is not necessary to connect the buried formwork 1 and the reinforcing bar wire mesh 15.

Subsequently, as shown in FIG. 3, concrete is cast and hardened (cured) until the height becomes equal to the height h of the upright portion 2 of the buried formwork material 1, whereby the concrete deck 12 is formed. Form (floor slab forming step). The buried formwork material 1 is integrated with the placed concrete. That is, the buried formwork 1 is integrated with the concrete deck 12. The upright part 2 of the buried formwork 1 has a height equal to the thickness of the concrete deck 12, and can be used as a guide when placing concrete. Therefore, a concrete deck with a thickness of 150 mm can be quickly used. It can be formed reliably. Therefore, the work can be performed efficiently.

FIG. 2 shows a case where a lightweight embankment is constructed by stacking foamed resin blocks 10 at a height of 3 m. When constructing a lightweight embankment by stacking the foamed resin blocks 10 to a height of 3 m, the foamed resin blocks 10 are placed on a foundation such as the ground where the foundation crushed stone layer and the paving sand layer are formed and leveled. Perform the block stacking process of arranging horizontally without gaps until the height is reached and stacking them. Next, the above-mentioned buried formwork fixing step, bar arrangement step, and deck forming step are performed to form the concrete deck 12.

FIG. 5 shows a case where a lightweight embankment is constructed by stacking foamed resin blocks 10 at a height of 9 m. When constructing a lightweight embankment by stacking foam resin blocks 10 higher than 3 m, first, the foam resin blocks 10 are placed 3 m on a foundation such as the ground where a foundation crushed stone layer and a sand bed layer are formed and leveled. Perform the block stacking process of arranging horizontally without gaps and stacking until the height of the block is reached. Next, the above-mentioned buried formwork fixing step, bar arrangement step, and deck forming step are performed to form a concrete deck 12 to be an intermediate concrete deck. Subsequently, the above-mentioned block stacking step, buried formwork fixing step, bar arrangement step, and deck forming step are similarly performed on the concrete deck 12, and these steps require lightweight embankment. Repeat until the height is reached (repeated twice in FIG. 5). Then, a concrete deck 12 to be an upper concrete deck is formed at the uppermost portion.

After that, as shown in FIGS. 2 and 3, the wall surface material 20 is fixed to the wall surface side of the foamed resin block 10 (wall material fixing step). The joints between the wall surface materials 20 are filled with a joint material having water-stopping, stretchability and weather resistance, for example, a resin foam having closed cells, and the joints are filled. The wall surface material 20 is not fixed to the wall surface of the buried formwork material 1. Therefore, the erection portion 2 of the buried formwork 1 is exposed in the lightweight embankment after construction. The gap formed between the buried formwork material 1 and the wall surface material 20 is filled with the water-stopping filler 21.

Next, as shown in FIG. 3, for example, when constructing a road on a lightweight embankment, a concrete block 31 as a curb, an asphalt 32 as a road surface, and the like are provided.

This builds a lightweight embankment. Since the method for constructing a lightweight fillet according to an embodiment of the present invention uses a buried formwork material, the formwork can be easily installed and no scaffolding for assembling the formwork is required. Further, since the buried formwork material is integrated with the concrete floor slab, the concrete floor slab integrated with the buried formwork material can be installed on the entire surface of the foamed resin block. Furthermore, the concrete deck can be formed quickly and reliably as compared with the conventional construction method. Moreover, since it is not necessary to dismantle the formwork, the construction work of the lightweight filling is simplified and no waste related to the formwork is generated. Also, there is no need to build a scaffold for building the formwork.

Therefore, it is also possible to support blocks for embankment construction (integrated with the wall material) where wall materials can be directly installed, and construction of lightweight embankments that can reduce the time and effort required to install the concrete floor slab formwork. A method can be provided. That is, it is possible to provide a method for constructing a lightweight embankment, which is excellent in workability and can shorten the construction period and reduce the cost.

Next, another step of the method of constructing a lightweight embankment will be described below.

When the foamed resin block 10 is not a block for building a filling (integrated with the wall material) on which the wall material can be directly installed (it is necessary to use H-shaped steel for forming the wall surface), FIG. 4 As shown in the above, after driving the H-shaped steel 30 forming the wall surface portion on the wall surface side of the foamed resin block 10, the above-mentioned block stacking step, buried formwork fixing step, bar arrangement step, and deck forming step are performed. conduct. However, since the buried formwork 1 is not exposed in the lightweight embankment after construction, the buried formwork 1 is fixed on the foamed resin block 10 so as to be flush with the foamed resin block 10 on the wall surface side.

After that, the wall surface material 20 is fixed to the wall surface side of the H-shaped steel 30 (wall surface material fixing step). The joints between the wall surface materials 20 are filled with a joint material having water blocking property to perform sealing.

If the foamed resin blocks 10 do not land (rattle of the stacked foamed resin blocks 10) and a step is generated between the buried formwork members 1 adjacent to each other, open joints (joints) are formed. It may be closed with a reinforcing material such as tape and corrected so as to have a smooth step by using a metal fitting such as a crocodile ball clip.

In the method for constructing a lightweight filling according to an embodiment of the present invention, the buried formwork 1 is fixed on the foamed resin block 10 by using the fixing member 9. Therefore, in the other steps of the lightweight filling construction method, the construction work of the lightweight filling is simplified and the same effect is obtained as in the one step of the lightweight filling construction method described above.

[Lightweight embankment structure]
As shown in FIGS. 2 and 3, the lightweight embankment structure according to the embodiment of the present invention is a lightweight embankment structure in which the concrete deck 12 is formed on the foamed resin block 10, and the buried formwork 1 is used. The embedded formwork 1 is configured to be fixed on the foamed resin block 10.

As the lightweight embankment structure according to the embodiment of the invention, the above-mentioned buried formwork material is used. In addition, a concrete deck integrated with the buried formwork is installed on the entire surface of the foamed resin block.

Therefore, it is possible to provide a lightweight embankment structure in which the labor required for installing the formwork of the concrete deck is reduced. That is, it is possible to provide a lightweight embankment structure that is excellent in workability and can shorten the construction period and reduce the cost.

The form of the lightweight embankment includes, for example, road embankment, railroad embankment, park embankment, garden embankment, landslide embankment, new embankment between existing embankments, raised embankment on the back of the embankment, widened embankment, back embankment of the structure, etc. Although various forms can be exemplified, the present invention is not limited to these forms, and includes various forms generally referred to as a lightweight embankment structure.

Further, the lightweight embankment structure according to the present invention can be used as a raised structure such as, for example, raising the back surface of an embankment, raising a train platform (platform), raising the floor of a warehouse, etc., in addition to the above-mentioned form. ..

That is, one embodiment of the present invention is a raised structure in which a concrete deck 12 is formed on a foamed resin block 10, and includes a buried formwork material 1, wherein the buried formwork material 1 is a foamed resin block. It may be a raised structure fixed on the 10.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention.

The method for constructing the lightweight embankment according to the present invention is, for example, road embankment, railroad embankment, park embankment, garden embankment, landslide embankment, new embankment between existing embankments, raised embankment on the back of the embankment, widened embankment, back embankment of the structure. , Etc., are suitably used for constructing various lightweight embankment structures.

1 Buried formwork 2 Standing part 3 Bottom plate part 4 Hole 9 Fixing member 10 Foamed resin block 11 Tying metal fittings 12 Concrete floor slab 13 Backing material 14 Cushioning material 15 Reinforcing bar wire net 20 Wall material 21 Filling material 30 H-shaped steel h Standing Height of the part l Length of the buried formwork t Average thickness of the bottom plate part w Width of the bottom plate part

Claims (6)

It is a method of constructing a lightweight embankment including a process of forming a concrete deck on a foamed resin block.
An L-shaped buried formwork with an L-shaped cross section, including an upright part having a height equal to the thickness of the concrete slab to be formed and a bottom plate part having an average thickness of 30% or less of the thickness of the concrete slab. After fixing the frame material on the foamed resin block, it has a step of placing concrete so that the thickness is equal to the height of the upright part.
The above-mentioned buried formwork is a method for constructing a lightweight embankment, characterized in that the length of the bottom plate portion is gradually shortened from the joint portion with the erection portion toward the tip portion. The method for constructing a lightweight embankment according to claim 1 , wherein the length of the buried formwork is 3 to 15 times the thickness of the concrete deck. The method for constructing a lightweight embankment according to claim 1 or 2 , wherein the buried formwork material is formed of fiber reinforced cement. The method for constructing a lightweight embankment according to any one of claims 1 to 3 , wherein a cushioning material is installed on the foamed resin block, and then an embedded formwork material is installed. It is a lightweight embankment structure with a concrete deck formed on a foamed resin block.
Equipped with a buried formwork, which is a frame material for concrete floor slabs to be cast,
The buried formwork has an L-shaped cross section and a standing portion having a height equal to the thickness of the concrete deck, and a bottom plate portion having an average thickness of 30% or less of the thickness of the concrete deck. And is fixed on the foam resin block,
The buried formwork is a lightweight embankment structure characterized in that the length of the bottom plate portion is gradually shortened from the joint portion with the erection portion toward the tip portion. It is a raised structure in which a concrete deck is formed on a foamed resin block.
Equipped with a buried formwork, which is a frame material for concrete floor slabs to be cast,
The buried formwork has an L-shaped cross section and a vertical portion having a height equal to the thickness of the concrete deck, and a bottom plate portion having an average thickness of 30% or less of the thickness of the concrete deck. And is fixed on the foam resin block,
The buried formwork has a raised structure in which the length of the bottom plate portion is gradually shortened from the joint portion with the erection portion toward the tip portion.

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