JPH08277537A - Assembling method for retaining wall-constructing form unit and its rise-preventing plate - Google Patents

Abstract

PURPOSE: To prevent a form unit from rising, and to accurately hold an inclination of the form unit, by connecting front and rear form units with metallic wire rods at regular intervals, and by arranging hard plates such as steel plates, each of which has a plurality of air vent holes thereon, between the wire rods. CONSTITUTION: In the case where a concrete-made retaining wall is constructed, a space 8 between a front form unit 2 and a rear form unit 3 is filled with ready mixed concrete 9 thrown from above, one after another from the bottom of the space 8. At this time, the ready mixed concrete 9 is filled through places where hard plate 7 are not arranged. In this case, the condition that the ready- mixed concrete 9 is temporarily stored on the hard plates 7 occurs, and force depressing downward metallic wire rods 5 holding the hard plate 7 at their end parts acts by its load. In this way, the rise of the front form unit 2 is restricted, and the concrete-made retaining wall having a designed inclination can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling a form for constructing a retaining wall and a floating prevention plate, and more specifically,
Retaining wall construction mold that can prevent the formwork from rising due to the weight of the fresh concrete when the concrete is filled in the formwork installed at the position for constructing the concrete retaining wall (reinforced concrete gravity retaining wall) The present invention relates to a frame assembling method and a floating prevention plate.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS.
When constructing a concrete retaining wall 54 to prevent the cliff 53 formed by the construction from collapsing when the mountain is cut down or the road 51, the residential land 52, etc. are constructed by embankment, Retaining wall construction formwork 55 at a predetermined place
Is assembled and installed, the concrete 55 for filling the retaining wall is filled and hardened, and the concrete retaining wall 54 is constructed by removing the form 55 for constructing the wall, the concrete retaining wall 54 and the cliff 53. The earth and sand are buried between and.

The retaining wall construction mold 55 is a front mold 56.
And a rear formwork 57, typically a concrete retaining wall 54
Is designed to have a predetermined inclination angle from the viewpoint of strength. Therefore, the front formwork 56 is installed so as to maintain the inclination angle according to the design specifications of the constructed concrete retaining wall 54. That is, the inclination angle varies depending on the form of the structure, but is generally 60 ° to 90 °.
Since the front wall surface of the concrete retaining wall 54 has this inclination angle, the front formwork 56 is installed at the inclination angle and the front formwork 56 is A plurality of reinforcing bars (metal wire rods) 58 must be securely fixed to the rear surface form 57.

[0004]

However, when the concrete retaining wall 54 is constructed using such a retaining wall construction formwork 55, there are the following problems. That is, when the fresh concrete is put into the space 58 formed between the front mold 56 and the back mold 57 from above, buoyancy is generated due to the fluidity and weight of the fresh concrete.
As indicated by the arrow, the front mold 56 rises. Due to the floating of the front mold 56 and the side pressure of the mold,
Since the installation positions of the front mold 56 and the rear mold 57 are displaced, the concrete retaining wall 54 having the inclination angle as designed cannot be obtained. And other issues.

In order to solve such a problem, first, waste concrete is placed at a place where a concrete retaining wall is constructed, and an anchor metal is embedded in the waste concrete, and the waste concrete is hardened. After that, assembling a retaining wall construction formwork having the front formwork and the backside formwork on this, and a method of tightening and fixing the metal wire rod connecting both formwork and the anchor metal fitting through the tension wire rod. Has been adopted. However, in the case of this construction method, it is necessary to precisely place the discarded concrete at a predetermined position and to firmly embed the anchor metal fittings, so that the workability is deteriorated. The cost is high because waste concrete that does not meet the design specifications is required. And other issues arise.

Therefore, as a result of various researches in view of such problems, the present inventor has found that a metal plate or the like is provided between adjacent metal wire rods located on a plane connecting the front mold and the rear mold. By arranging the hard plate of, it was found that the floating can be remarkably reduced.

The present invention has been made in view of the above problems, and its purpose is to provide a space formed by tightly connecting the front and back molds with a metal wire rod. Provided is a method for assembling a retaining wall construction formwork and a floating prevention plate that can remarkably reduce floating of the front formwork due to gravity of the injected fresh concrete when constructing a concrete retaining wall by pouring fresh concrete. To do.

[0008]

A method for assembling a retaining wall construction form according to claim 1 of the present invention as means for solving the above-mentioned problems is a concrete as a part of roads and other structures. When constructing a retaining wall, a front formwork and a rear formwork are installed at predetermined places for constructing the concrete retaining wall, and the formwork is connected by metal wire rods at predetermined intervals. In the method for assembling a wall-building formwork, a hard plate such as a steel plate having a plurality of air vent holes is provided between metal wire rods located on the lower part of both formwork and on the adjacent (adjacent) plane. It is arranged to be arranged.
The method for assembling the retaining wall construction form according to claim 2 is the method for assembling the retaining wall construction form according to claim 1, wherein the hard plate is arranged between the metal wire rods located at the bottom. It is configured to be.

According to a third aspect of the present invention, in the construction of a concrete retaining wall as a part of a road or other structure, the floating prevention plate has a front formwork and a rear surface at predetermined places for constructing the concrete retaining wall. A floating prevention plate for use in an assembling method of a retaining wall construction mold, in which a mold is installed and the two molds are connected by a metal wire at a predetermined interval. And a wire rod holding portion having a holding hole or the like for holding a metal wire rod at its end. Also,
According to a fourth aspect of the present invention, in the floating prevention plate according to the third aspect, one or a plurality of wire rod holding portions are provided at an intermediate portion of the plate.

[0010]

In the method for assembling the retaining wall construction form according to claim 1 of the present invention, a plurality of air vent holes are provided between the metal wire rods located in the lower portion of the form and on the adjacent planes. Since a hard plate such as a steel plate is arranged, fresh concrete poured from the upper part into the space formed between the front and back molds passes through the part where the plate is not arranged and the air vent hole. It is filled from the bottom of the space, but when the fresh concrete is filled, the raw concrete temporarily accumulates on the plate, and the load pushes down the metal wire rod that holds the plate. Since the force acts and the lifting can be prevented, it is possible to obtain the concrete retaining wall having the designed inclination angle.

A method for assembling the retaining wall construction formwork according to claim 2 is
Since the hard plate is arranged between the metal wire rods located at the lowermost stage, in addition to the effect of claim 1, the lowermost stage portion of the space is stabilized, so that the lifting thereof can be further reduced, and more accurate inclination can be obtained. An angled concrete retaining wall can be obtained.

Since the floating prevention plate according to claim 3 has a plurality of air vent holes on the surface thereof and wire holding portions including holding holes for holding the metal wire rods on the left and right ends thereof, the metal wire rod Can be held in place with the concrete, and when the concrete is poured, the state of accumulating the concrete can be temporarily obtained, and since it has multiple air vent holes, the concrete can be accurately placed on the lower surface of the plate. Can be filled. Further, since the floating prevention plate of claim 4 has one or a plurality of wire rod holding portions at an intermediate portion of the plate, in addition to the function of claim 3, the lifting can be further reduced. .

[0013]

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 side sectional view in the process of constructing a concrete retaining wall using a retaining wall construction formwork, FIG. 2 is a sectional view of FIG. 1A-A, and FIG. FIG. 4 is a plan view, FIG. 4 is a cross-sectional view taken along line 3B-B, and FIG. 5 is a front view of FIG.

The method of assembling the retaining wall construction formwork of this embodiment is as follows.
Similar to the conventional general construction method described above, the method is an assembling method of a retaining wall construction form used when constructing a reinforced concrete gravity retaining wall as a part of a road or other structure. Here, the retaining wall construction formwork 1 used in the present embodiment is, as shown in FIGS. 1 and 2, a plurality of front formwork 2 and rear formwork 3 and two formwork 2 and 3 which are tightly connected to each other. .. and steel plates having a plurality of air vent holes 6 arranged between the metal wire rods 5 and 5 located on the adjacent planes in the lower portions of the two metal molds 5, 5 ... And the like having a hard plate 7.

The front mold 2 and the rear mold 3 are made of wood or other plate material, and should be removed after the ready-mixed concrete 9 put into the space 8 formed between the molds 2 and 3 has hardened. Then, the concrete retaining wall 10 is constructed. .. and the hard plate 7 are embedded in the constructed concrete retaining wall 10 to form a reinforcing material for the concrete retaining wall 10.

As shown in FIGS. 3 to 5, the hard plate 7 is made of a thin steel plate and usually has a thickness of 0.5 to 1.
A metal plate having a size of about mm is used, and a plurality of air vent holes 7 are formed in this plate at predetermined intervals. The size of this plate 7 is usually 100 to 600 m in length.
m, width: about 100 to 600 mm is used, and wire rod holding holes 1 for holding the metal wire rods 5 are provided at both ends thereof.
1 is provided. This wire rod holding hole 11 is usually formed by bending the end of the hard plate 7. By the way, since the reinforcing rod having a diameter of about 9 mm is used as the metal wire rod 5, the hole diameter of the wire rod holding hole 11 is set so that the metal wire rod 5 can be smoothly inserted.

The hard plate 7 is attached between the metal wire rods 5 and 5 arranged at the bottom. The bottom of the metal wire rod 5 is 100 to 500 from the bottom.
The metal wire 5 arranged above the
It is arranged at a wider distance than the distance between the bottom and the bottom. Further, the distance x between the end of the hard plate 7 and the front mold 2 and the distance y between the end of the hard plate 7 and the back mold 3 are:
It is preferable to leave a space of at least 100 to 150 mm or more from the size of the maximum aggregate of the concrete to be poured and filled. When the distance is narrower than this distance, the lower surface of the hard plate 7 is prevented from being insufficiently filled with concrete.

The hard plate 7 is continuous depending on the inclination angle of the front mold 2, or as shown in FIG.
Every other sheet or several sheets are skipped depending on the situation. The hard plate 7 may be arranged not only between the lowermost metal wire rods 5 and 5, but also above it. In the case of this configuration, the upper and lower hard plates 7 may be attached in a zigzag manner in a side view so that they are not located at the same place. Further, when the inclination angle is large, the effect can be further enhanced by continuously attaching.

When the concrete retaining wall 10 is constructed by using the method for assembling the retaining wall constructing formwork of this embodiment, the upper part is placed in the space 8 formed between the front formwork 2 and the rear formwork 3. The ready-mixed concrete 9 poured from is filled from the bottom of the space through the portion where the hard plate 7 is not arranged.
However, in the case of the present embodiment, since the hard plate 7 is partially attached, the state where the ready-mixed concrete 9 accumulates on the hard plate 7 is temporarily at the portion where the hard plate 7 is attached. Will occur,
Due to the load, a force that pushes down the metal wire 4 that holds the hard plate 7 at the end works, and the rise of the front form 2 of the retaining wall construction form 1 is regulated, so that the rise can be prevented. It is possible to obtain a concrete retaining wall having an inclined angle.

The present invention is not limited to the above-described embodiments, but includes configurations that can be modified and implemented within the scope of the present invention. Incidentally, in the above-described embodiment, the hard plate is described as the configuration in which the wire rod holding portion for holding the metal wire rod is formed only at the plate end portion, but as shown in FIG. To 1
It may be configured to have a single piece or a plurality of wire rod holding portions 11 at predetermined intervals. Further, the hard plate is not limited to a steel plate, and may be a concrete panel, a ceramic plate, or the like that has strength equal to or higher than that of concrete and that is familiar and integral with the concrete.

[0021]

As is apparent from the above description, according to the method for assembling the retaining wall construction formwork of claim 1 of the present invention, the metalwork located at the lower part of the formwork and on the adjacent plane. Since a hard plate such as a steel plate having a plurality of air vent holes is arranged between the wire rods, the ready-mixed concrete poured from above into the space formed between the front and back molds, It is filled from the bottom portion of the space through a portion where the plate is not arranged and the air vent hole, but when the fresh concrete is filled, a state where the fresh concrete is temporarily accumulated on the plate occurs, The force that pushes down the metal wire that holds the plate due to the load acts,
Since the lifting can be reduced, there is an effect that a concrete retaining wall having a designed inclination angle can be obtained.

According to the method for assembling the retaining wall construction formwork of claim 2, since the hard plate is arranged between the metal wire rods located at the lowest stage, the space is provided in addition to the effect of claim 1. Since the lowermost part of the is stable, the floating can be further reduced, and a concrete retaining wall having a more accurate inclination angle can be obtained.

According to the floating prevention plate of the third aspect, the metal wire rod has the plurality of air vent holes and the wire rod holding portions including the holding holes for holding the metal wire rod at the left and right ends thereof. Can be held in place with the concrete, and when the concrete is poured, the state of accumulating the concrete can be temporarily obtained, and since it has multiple air vent holes, the concrete can be accurately placed on the lower surface of the plate. It has the effect that it can be filled.

According to the floating prevention plate of claim 4, since one plate or a plurality of wire rod holding portions are provided at the intermediate portion of the plate, in addition to the effect of claim 3, the floating prevention plate is further raised. Has the effect of reducing

[Brief description of drawings]

FIG. 1 is a side sectional view in the process of constructing a concrete retaining wall using a retaining wall construction form showing an example of the present invention.

FIG. 2 is a sectional view of FIG. 1A-A.

FIG. 3 is a plan view of a lifting prevention plate.

FIG. 4 is a sectional view of FIG. 3B-B.

FIG. 5 is a front view of FIG.

FIG. 6 is a front view of another embodiment of the floating prevention plate.

FIG. 7 is an explanatory diagram of a process of constructing a concrete retaining wall using the conventional retaining wall construction formwork.

8 is a sectional view of a conventional example corresponding to FIG.

FIG. 9 is a side sectional view in the process of constructing a concrete retaining wall using the retaining wall construction formwork for explaining the lifted state.

[Explanation of symbols]

1 ... Retaining wall construction form, 2 ... Front form, 3 ...
Back formwork, 5 ... metal wire rod, 6 ... air vent hole,
7 ... Hard plate, 8 ... Space, 9 ... Fresh concrete, 10 ... Concrete retaining wall, 11 ... Wire holding hole, 51 ... Road, 52 ... Housing land, 53 ...・
・ Cliff, 54 ... Concrete retaining wall, 55 ... Retaining wall construction form, 56 ... Front form, 57 ... Rear form,
58 ... Metal wire

Claims (4)

[Claims] 1. When constructing a concrete retaining wall as a part of a road or other structure, a front formwork and a rear formwork are installed at predetermined places for constructing the concrete retaining wall, and both In a method of assembling a retaining wall construction formwork in which the formworks are connected by a metal wire rod at a predetermined interval, a plurality of metal wire rods are provided at a lower portion of both the formworks and between adjacent metal wire rods. A method for assembling a retaining wall construction form, characterized in that a hard plate such as a steel plate having individual air vent holes is arranged. 2. A method for assembling a retaining wall construction form according to claim 1, wherein the hard plate is arranged between metal wire rods located at the lowest stage. How to assemble the frame. 3. When constructing a concrete retaining wall as a part of a road or other structure, a front formwork and a rear formwork are installed at predetermined places for constructing the concrete retaining wall, A floating prevention plate used for an assembling method of a retaining wall building mold, wherein the two frames are connected by a metal wire at a predetermined interval, the floating prevention plate having a plurality of air vent holes, An uplift prevention plate having a wire rod holding portion including a holding hole for holding a metal wire rod at an end thereof. 4. The uplift prevention plate according to claim 3, wherein one or a plurality of wire rod holding portions are provided in an intermediate portion of the uplift prevention plate at predetermined intervals.