JPH05112938A - Method of reinforcing earthwork such as subbase reinforcement, filling, slope reinforcement, etc., and form used therefor - Google Patents

Abstract

PURPOSE:To make it possible to arrange reinforcing nets accurately and easily on subgrade by fixing a reinforcing body to a reinforcing earth execution place by a concrete block combining the ends of the reinforcing body with a form. CONSTITUTION:A hollow and bottomed form 2 having the surface 4 formed in a concrete block shape, having a block piling projection 7 on the bottom and having a ready-mixed concrete pouring hole 10 is installed on one side section of a reinforcing earth execution place. A reinforcing body insertion section 5 into which a reinforcing body 3 such as reinforcing nets, reinforcing ropes, etc., is inserted is provided to a part of the surface of the form 2. Then, after the end of the reinforcing body 3 is directly or indirectly inserted into the reinforcing body insertion section 5 of the form 2, ready-mixed concrete is placed and filled into the form 2, and the ends of the reinforcing body 3 is combined with a concrete block body. The reinforcing body 3 is fixed to the reinforcing earth execution place by the concrete block body to obtain the reinforcing earth.

Description

Detailed Description of the Invention

[0001]

The present invention relates to roadbed reinforcement, embankment reinforcement,
The present invention relates to a reinforced soil construction method such as slope reinforcement and a form made of synthetic resin used for the construction method. More specifically, when constructing reinforced soil such as roadbed reinforcement, embankment reinforcement, slope reinforcement, etc. The present invention relates to a reinforced earth construction method capable of accurately laying and tensioning a reinforcing net, requiring no skill, shortening a construction period, and improving workability thereof, and a formwork used for the construction method.

[0002]

2. Description of the Related Art Conventionally, as a reinforced soil construction method for roadbed reinforcement, embankment reinforcement, slopes, etc., a reinforced mesh (mesh structure) is laid on the roadbed at a reinforced soil construction site such as roadbed reinforcement, embankment reinforcement, etc.
A construction method is known in which a roadbed is provided on the reinforcing net by a roadbed material and the surface of the roadbed is used as the road surface. According to this method, the interlocking (anchoring) effect of soil particles in the upper and lower parts of the mesh of the reinforcing net
Since the reinforcing net is integrated with the roadbed and the soil of the roadbed, the roadbed can be reinforced by simple construction.

Here, as the reinforcing net, a high-strength net for plastics for civil engineering which is made of a synthetic polymer as a raw material is usually used as the reinforcing net, and one layer is laid according to roadbed conditions, traffic conditions, load conditions, etc. It is applied to multi-layer laying or mattresses that wrap roadbed materials.

[0004]

However, this reinforced earthwork method has the following problems. That is, depending on the type of the reinforcing net, in the case of single-layer laying or multi-layer laying, the end portion of the reinforcing net may be rolled during the reinforcement work, resulting in a roadbed portion where the reinforcing net is not laid. In the case of mattress construction, much work is required to cover the roadbed material. It takes time to fix the end of the reinforcing net. It takes time to fix the roadbed and the side of the embankment. There are problems such as.

By the way, in recent years, in the reinforced earth construction method, the "reinforcement embankment method" and "method" can be used by utilizing the pulling effect of the reinforcing material to enable vertical and steep slope embankment and without the need for a large foundation such as a concrete retaining wall. "Surface steep slope construction method" has been proposed. And according to this construction method, the embankment land width is 1/2 compared to the conventional embankment construction method using a concrete retaining wall.
It has the advantage that it can be reduced to a certain degree and that the construction cost can be reduced by about 50%.

However, even with this construction method, since it is necessary to form a rigid wall surface on the peripheral wall portion, there is a problem in that it is troublesome to install the rigid wall surface and to form the peripheral wall.

Therefore, in view of the above points, the present inventor has
As a result of various studies and tests, use of the “concrete block building method and synthetic resin formwork used in this construction” (see Japanese Patent Application No. Hei 2-231950) previously proposed by the present inventor. Then, it was clarified that each of the above-mentioned problems can be solved.

The present invention was devised in response to the above-mentioned problems, and the purpose thereof is to apply a reinforced soil such as roadbed reinforcement, embankment reinforcement, slope reinforcement, etc. to the roadbed. To provide a reinforced earth construction method and a formwork used for the construction method that enable accurate laying and tensioning of the reinforcement net, do not require skill, can shorten the construction period, and improve its workability. is there.

[0009]

[Means for Solving the Problems] And, as a means for solving the above problems, the reinforced soil construction method of the present invention is a hollow bottomed bottom having a concrete block surface formed on one side of a reinforced soil construction site. In addition, a mold having a block stacking fitting portion at the bottom portion and a concrete flow-down or overflow portion, and a reinforcing body insertion portion such as a reinforcing net or a reinforcing rope on a part of the surface is inserted into the reinforcing body. Installed so that the portion faces the other side of the reinforced soil construction site, and directly or indirectly inserts the end of the reinforcement into the reinforcement insertion portion of the form, A method of injecting and filling fresh concrete into a concrete block to directly or indirectly integrate the ends of the reinforcing body and fixing the reinforcing body to the reinforced soil construction site by the concrete block body Yo The constitution which is configured to obtain a reinforced soil.

Further, in another reinforcing earthwork method of the present invention, in the above-mentioned invention, the formwork having the reinforcing body inserting portion on the front upper part or the rear surface upper part is stacked, and the reinforcing body insertion of the formwork located below is stacked. After directly or indirectly inserting the end of the reinforcing body into the part, the concrete is poured and filled into the formwork located on the lower side through the formwork located on the upper side, and the end part of the reinforcement body is inserted. The concrete block is directly or indirectly integrated into a concrete block.

Further, the formwork used in the reinforced soil construction method of the present invention is provided with a fresh concrete pouring / filling opening on the top of a hollow bottomed formwork whose surface is formed in the shape of a concrete block. Part is provided with a reinforcing body insertion part for constructing reinforced soil, and a bottom part is provided with a block stacking fitting part and concrete flowing down or overflowing part, pouring and filling fresh concrete into the formwork to obtain a concrete block It is configured as described above. In the present specification,
"Green concrete" includes concrete milk in addition to normal green concrete. In addition, here, the mold includes various types that can be obtained by synthetic resin, metal, concrete, paperboard and the like.

[0012]

According to the reinforced earth work method of the present invention, a reinforced body such as a reinforced net is laid on a roadbed at a reinforced earth construction site, and concrete is poured into the end of the reinforced body to inject concrete. After arranging the formwork that forms the, and inserting the end portion of the reinforcement body into the reinforcement body insertion portion formed on the front surface of the formwork, pouring fresh concrete into the formwork.
By filling, it is possible to obtain a concrete block body in which the end portions of the reinforcing body are integrated, so that the reinforcing body can be accurately and easily arranged, and a side wall and the like can also be obtained. To work.

The formwork used in the reinforced earth method is a formwork in which a block body can be obtained by pouring and filling fresh concrete into the formwork. After inserting the end of the reinforcing body, injecting and filling fresh concrete and curing it, the structure that integrates the reinforcing body works so that it can be embodied in the reinforced earth construction method, and it is a simple work. Therefore, the same work as the mattress construction can be performed, and the work of fixing the reinforcing body can be omitted.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. Here, FIG. 1 to FIG.
1 shows an embodiment of the present invention, FIG. 1 is a schematic sectional view showing a work process of the reinforced earthwork method of the present embodiment, FIG. 2 is a front view of a formwork used in the reinforced earthwork method, FIG. 3 is a side view, and FIG. 4 is a plan view, FIG.
8 is a side view showing a construction state, FIG. 6 is a perspective view showing a state where the molds are stacked, FIG. 7 is an enlarged perspective view of the molds, and an enlarged sectional view showing a state where the reinforcing body is inserted into the reinforcing body inserting portion. [Fig. 3] is an explanatory view when a tie rod joint is used as a reinforcing body.

The reinforced earthwork method of the present embodiment is a reinforced earthwork method for reinforcing a roadbed, and is roughly summarized as follows: roadbed leveling step, synthetic resin formwork setting step, reinforcement arranging step,
It consists of six steps: the raw concrete filling step, the roadbed material arranging step, and the next step.

-Subgrade Leveling Step-This step is a step of leveling the subgrade 1. This process is
It is a preparatory step for carrying out the reinforced earth construction method, in which the synthetic resin formwork 2 used in the subsequent step is installed, the reinforcing body 3 is arranged, and other works can be smoothly carried out.
Is a step of smoothing the.

-Synthetic Resin Form Setting Step-This step is a step of installing the synthetic resin form 2 at a predetermined location on the roadbed 2 that has been leveled in the roadbed leveling step. That is,
It is a process of installing the synthetic resin molds 2, 2 ... at predetermined places on the left and right where roads and railroads are made, and stacking and installing multiple stages (usually two stages).

As shown in FIGS. 2 to 8, the synthetic resin mold 2 is a hollow, bottomed, planar rectangular mold whose surface is formed in the same shape as a concrete block. By doing so, a pattern or the like is formed on the front surface 4) similarly to a concrete block, an opening 7 is formed on the upper portion, and the end portions 3a and 3b of the reinforcing body 3 are inserted on the upper rear portion. The reinforcing body insertion part 5 is formed, and the convex part 6 that constitutes the fitting part is further formed on the bottom surface. The opening 7 is
Engage with the convex portion 6 of another synthetic resin mold 2 to be stacked,
It is also a filling port for pouring and filling fresh concrete. In addition, the convex portion 6 is formed of another synthetic resin mold 2 to be stacked.
The engaging portion for engaging with the opening portion 7 of the above is small with respect to the peripheral wall surface 8 of the synthetic resin mold 2 and has a shape protruding downward. In addition, the surface of the convex portion 6, in other words,
The bottom surface 9 of the synthetic resin mold 2 is provided with one or more fresh concrete flow-down holes (or overflow holes) 10.

Here, the flow-down hole 10 is usually 3 although it differs depending on the shape and form of the concrete block itself.
The holes are formed at intervals of 0 cm, and the size is about 3 to 10 cm in diameter. However, other sizes may be selected.
In addition, a notch 11 is formed on the upper side surface of the synthetic resin frame 2.
Is provided. The notch 11 is a notch for installing a reinforcing bar 12 for laterally connecting the synthetic resin molds 2, 2, .... Here, the notch 11 has another shape such as a V shape and a U shape.

The synthetic resin mold 2 is usually manufactured in advance in a factory, and the material thereof is polyethylene resin,
Thermosetting resins or thermoplastic resins such as polypropylene resin, polyester resin (unsaturated polyester resin) and vinyl chloride resin are used. Among them, those having weather resistance and strength such as FRP are more preferable. By the way, the synthetic resin mold 3 is not limited to a rectangular shape, but may be a circular shape, a triangular shape, or another polygonal shape, and is usually in a range of various sizes that can be transported by a transportation means such as a truck. It is a thing.

More specifically, the synthetic resin mold 2
a and 2b are installed at the left and right positions of the roadbed 1 so that the reinforcing body insertion parts 5 and 5 face each other, and the synthetic resin molds 2a and 2b located on the lower side are further provided with synthetic resin molds. Frame 2a ',
2b 'are stacked via the convex portion 6 and the opening portion 7, respectively.

-Reinforcement Disposing Step-This step is a step of inserting or arranging the ends 3a and 3b of the reinforcement 3 directly or indirectly into the reinforcement insertion portion 5 of the synthetic resin mold 2. .. That is, both ends 3a, 3b of the reinforcing body 3
Is inserted into the reinforcing body insertion portion 5 of the synthetic resin molds 3a ..., 3b ..., and at the same time, the reinforcing bars 12 are inserted and arranged in the notches 11, 11, ... In this step, the reinforcing bars 12 are erected and arranged through the downflow holes 7 (the reinforcing bars may be erected and arranged in the previous step). Here, as the reinforcing body 3, a high-strength net for civil engineering plastics, which is made of the synthetic polymer obtained by the above-described stretching process, is used, and a tenser (made by Mitsui Kasei Co., Ltd.) usually made of polypropylene or high-density polyethylene is used. (Reinforcing net material), other synthetic resin nets, fiber nets, and metal nets, and the end of the net is partially torn so that it can be easily inserted into the reinforcing member insertion portion 5. There is. However, a wire made of metal, synthetic resin, fiber or the like, rope, or other pull resistant material may be used. Moreover, you may use a board | plate body, a nonwoven fabric, etc. as needed. As the reinforcing body 3, for example, when the tensor is not used,
Usually, a tie rod joint, that is, an anchor 15 to which a joint 16 such as a perforated plate, a bolt, or a round hole bar is attached (see FIG. 8, a joint including a perforated plate is used in FIG. 8) The anchor is inserted into the reinforcing body insertion portion 5, and the reinforcing body 3 made of a pull resistant material such as a wire is indirectly inserted and arranged through a tie rod joint or the like made of the anchor 15 and the joint 16. There is.

-Fresh concrete filling step-This step is for stacking synthetic resin molds 2a, 2a '.
., 2b, 2b '... is a step of pouring and filling fresh concrete to form a concrete block body. That is, the synthetic resin molds 2a ', 2b' located on the upper side
Fresh concrete is poured from the opening 5 of the synthetic resin mold 2a ', 2b' through the holes 10 for flowing down the raw concrete, and the synthetic resin mold 2a located below the raw concrete. 2b, the filling is completed in a state where the green concrete reaches the lower positions of the synthetic resin molds 2a ', 2b' located on the upper side, and the end portions 3a, 3b of the reinforcing body 3 are filled.
Is a step of directly or indirectly integrating it into the synthetic resin mold 2. Here, the strength of green concrete is the same as that of a normal concrete block. Then, the concrete filled in the synthetic resin molds 2, 2, ... Is cured and integrated with the synthetic resin molds 2, 2, .. In addition, the left and right directions are notches 11, 11 ...
Concrete is solidified and integrated through 2. In addition,
An opening may be provided in the side surface of the mold 2 below the notch 11 so that the reinforcing bar 12 and the concrete can be sufficiently wrapped to ensure that the concrete is filled.

-Roadbed Material Arranging Step-In this step, the roadbed material (soil) 13 is returned between the synthetic resin molds 2a and 2b formed into concrete blocks in the previous step to form the roadbed and the reinforcing member 3 is formed. Is the process of jointing. The roadbed material 13 and the roadbed 1 are integrated by the reinforcing body 3 between the synthetic resin molds 2a and 2b, and the roadbed material 13 is formed by the left and right synthetic resin molds 2a and 2b. The movement is retained. It should be noted that this step is usually performed in parallel with the curing step.

-Next Step-This step is a step of laying the reinforcing body 3 in multiple layers by repeating the previous step. That is, the synthetic resin molds 2a ..., 2b ... are replaced by repeating the preceding steps of the synthetic resin mold setting step, the reinforcement disposing step, the fresh concrete filling step, and the roadbed material disposing step. By sequentially stacking and arranging the reinforcing bodies 3, 3, ... And integrating the reinforcing bodies 3, 3, .. In the synthetic resin molds 2, 2, .. .. are laid in multiple layers to obtain a road or the like having a predetermined roadbed with a predetermined reinforced soil. Here, the joints of the reinforcements 3 and 3 generally have a configuration of wrapping, but may have a configuration of being fixed, or the reinforcement 3 may be a single piece.

When the result of the construction using the reinforced soil construction method of the present embodiment is compared with the conventional construction method using the sandbag as the side wall, when the reinforcement body (tensor) is further laid, While it took 15 days to construct a road having a length of 50 m and a width of 10 m, the construction period could be shortened to 5 days by 10 days in the case of this example. This is because a large construction time difference occurred in the time required for fixing the reinforcing body and constructing the side wall. Further, in the case of the present embodiment, the reinforcing body is integrated with the block body formed of the synthetic resin frame body, and the fixed state of the end portion of the reinforcing body is maintained well, and the laying work of the reinforcing body is lightweight. It was a work, and it was confirmed that it could be easily constructed without the need for expert specialization.

It should be noted that the present invention is not limited to the above-described embodiments, but includes modifications that can be implemented without departing from the scope of the present invention. Incidentally, in the above-mentioned embodiment, the formwork is installed on the left and right sides of the roadbed, and the roadbed is formed between the left and right formwork. However, as shown in FIG. 9, only on one side of the roadbed. Install a formwork and ground anchor 1 on the other side
It is also possible to directly fix it to a mountain or the like with 4. Further, in the above-described embodiment, the configuration in which the reinforcing body 3 is directly or indirectly arranged on all of the molds has been described.
The reinforcing body 3 may be arranged in every three stages or the like.

Further, in the above-described embodiment, the reinforcing member insertion portion is provided on the upper rear surface of the mold, but the upward hole is provided on the rear surface middle portion, the front middle portion and the other mold surface.
The hole may be a reinforcing body insertion portion. Also,
As shown in FIG. 10, it goes without saying that the slope can be reinforced, and in this case, the formwork 2 has the reinforcing body insertion portions 5 and 5 at both the upper front surface and the upper rear surface. In the reinforcement insertion portion 5 in the front upper part, the reinforcement 3 for reinforcing the ground on the slope is inserted and integrated, and the reinforcement is fixed in the ground on the slope. The configuration is similar to the example. Further, the form may be stacked up to a position above the roadbed, and a soundproof wall or the like may be formed on the form of the part.

Further, in the above-mentioned embodiment, the reinforcing body insertion portion is provided or formed on the upper rear surface of the mold, but it is explained that the reinforcing body insertion portion is formed on other parts of the surface, for example, the upper surface, the left and right side surfaces, the bottom surface. Alternatively, it may be provided at a corner or a corner. Further, the insertion part may be a hole. Further, in the above-described embodiments, the mold is described as a synthetic resin mold, but it goes without saying that a mold made of metal, concrete, paperboard or the like may be used.

[0030]

As is apparent from the above description, according to the reinforcing earthwork method of the present invention, after the end portion of the reinforcing net is inserted into the reinforcing body insertion portion formed on a part of the surface of the formwork, , A method of pouring and filling fresh concrete into the formwork to obtain a concrete block body in which the ends of the reinforcement body are directly or indirectly integrated to fix the reinforcement body. Therefore, there is an effect that the reinforcing body can be accurately and easily arranged and, at the same time, a side wall and the like can be easily obtained.

Further, according to the formwork used in the reinforced earthwork method of the present invention, a block body can be obtained by pouring and filling fresh concrete into the formwork. After directly or indirectly inserting the end portion of the reinforcing body into the reinforcing body inserting portion provided in the portion, fresh concrete is poured and filled, and this is cured to obtain a structure in which the reinforcing body is integrated. It has the effect of being able to. Further, it is possible to perform the same work as the mattress construction with a simple work, and also to have an effect that the fixing work of the reinforcing body can be omitted.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a work process of a reinforced earth work method of the present embodiment.

FIG. 2 is a front view of a synthetic resin mold used in the present reinforced earth construction method.

FIG. 3 is a side view.

FIG. 4 is a plan view.

FIG. 5 is a side view showing a construction state.

FIG. 6 is a perspective view showing a state in which synthetic resin molds are stacked.

FIG. 7 is an enlarged perspective view of a synthetic resin mold and an enlarged cross-sectional view of a state in which a reinforcing body is inserted in a reinforcing body insertion portion.

FIG. 8 is an explanatory diagram when a tie rod joint is used as a reinforcing body.

FIG. 9 is a cross-sectional view of another embodiment.

FIG. 10 is a cross-sectional view of another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Roadbed, 2 ... Synthetic resin form, 3 ... Reinforcement body, 4 ... Front surface, 5 ... Reinforcement body insertion part (hole), 6
... Opening portion, 7 ... Convex portion, 8 ... Surface wall of synthetic resin mold, 9 ... Lower surface of synthetic resin mold, 10 ...
Holes for flowing down fresh concrete, 11 ... Notches, 12 ...
..Reinforcing bars, 13 ... Roadbed materials, 14 ... Tie rods,
15 ... Anchor, 16 ... Joint

Claims (3)

[Claims] 1. A hollow bottomed bottom having a concrete block-like surface on one side of a reinforced soil construction site, a block stacking fitting section at the bottom, and a concrete flow-down or overflow section, and Reinforcing mesh on part of the surface,
A formwork having a reinforcement body insertion part for inserting a reinforcement body such as a reinforcement rope is installed so that the reinforcement body insertion part faces the other side of the reinforcement soil construction site, and the reinforcement of the formwork is performed. After directly or indirectly inserting the end portion of the reinforcing body into the body insertion portion, pouring and filling fresh concrete into the formwork to form a concrete block body in which the end portion of the reinforcing body is integrated, A reinforced soil construction method such as roadbed reinforcement, embankment, slope reinforcement, etc., characterized in that a reinforced soil is obtained by fixing the reinforced body to the reinforced soil construction site with a concrete block body. 2. Forming a form having a reinforcing body insertion part on the upper rear surface or the upper front, and inserting the end of the reinforcing body directly or indirectly into the reinforcing body insertion part of the formwork located on the lower side. After that, fresh concrete is poured and filled into the formwork located on the lower side through the formwork located on the upper side, so that a concrete block body in which the ends of the reinforcing body are directly or indirectly integrated is obtained. Reinforced earthwork method such as roadbed reinforcement, embankment and slope reinforcement according to claim 1. 3. A raw concrete pouring / filling opening is provided in the upper part of a hollow bottomed formwork whose surface is formed in the shape of a concrete block, and a reinforcement insert portion for reinforced soil construction is provided in a part of the surface. Reinforced soil such as roadbed reinforcement, embankment reinforcement, etc., which is provided with a block stacking fitting part and concrete flowing down or overflowing part at the bottom part, and pouring and filling fresh concrete into the formwork to obtain a concrete block Formwork for construction.