JP3238761B2 - Intersection formwork for construction of legal framework - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork for constructing a sloping frame for stabilizing a slope such as a slope, and more particularly to a unit type intersection formwork which realizes efficient work.

[0002]

2. Description of the Related Art A method of stabilizing a slope by constructing a method frame typified by a so-called free frame method is disclosed in Showa 5
It has been actively adopted since the beginning of the 0s.

In this free frame method, cement, sand (fine aggregate) and, if necessary, gravel (coarse aggregate) are kneaded with water in a spray gun tank, and are pressure-fed into a hose by an air conveying force. The blasting nozzle connected to the end of the hose sprays mortar or concrete onto the target surface. In this case, a crimped wire net is arranged in parallel along the ground, and a space between the crimped wire nets is connected by a spacer to be self-supporting. Spray the material,
This is to build a legal framework. Reinforcing bars are arranged in the adjacent side forms.

[0004] As a spraying material, the weight ratio of cement: sand is usually 1: 4 in the case of mortar spraying, and the weight ratio of cement: sand: gravel is 1 in the case of concrete spraying. : 4: 1-2. Furthermore, since the crimped wire mesh is used as the formwork, the rigidity is low and the material transfer distance is 50 m as the maximum height.
The slump value specified in JIS A 1101 is basically set to 0 for reasons such as a long horizontal distance of about 100 m.

[0005]

However, in the case of this type of conventional method for spraying a frame, the following problems remain despite the large number of achievements.

(1) The cement: sand weight ratio (C / S) is 1/4, and poor mixing results in insufficient strength. (2) When the poorly-mixed material is blown into the mold with air,
A large amount of Riva c Ndorosu occurs, and does not exclude this,
Nests form, resulting in reduced strength. (3) If a non-fluid material having a slump value of 0 is used,
It is difficult to go around the back side of the rebar, leaving gaps or nests, resulting in a decrease in strength.

[0007] Therefore, a method of filling a material with a rich mixture in a mold using a mold completely surrounding the periphery of the cross section is being developed. However, the so-called pumping method frame method also has the following problems. (B) When the material is pumped through a commonly used 2.5 inch hose, a load of about 20 kg is applied to the worker holding the tip of the hose and the spray nozzle, and the worker holds it at all. However, it is difficult to cast while moving along the ground and formwork,
For this purpose, it is necessary to extend the boom to the prosthesis with a concrete pump truck and drive it through a pipe routed along the boom. It is unsuitable for the construction of mountainous areas where the movement of water is restricted spatially. (B) In order to spread the material all over the formwork or to maintain its quality, it is necessary to vibrate the material with a vibrator. Also inferior. (C) Spreading the material cast from the shoulder over the entire mold is an extremely difficult technique due to the poor fluidity of the material, and it is particularly difficult to fill the horizontal frame. Further, specifically, an unfilled space portion is generated at the upper portion of the horizontal frame on the side of the shoulder. As a result, the method is limited to the construction of a legal frame having a small area. Inadequate over how (d) vibrator over, there are variations in the quality of the finished law frame, despite the wealth blending, strength is low.

Therefore, the applicant of the present invention has made mortar or concrete the main component, and the cement: sand weight ratio is
1: 2.7 to 3.5, Slump value is 10 to 29c at the pumping source
m, 2 to 10 cm, preferably 3 to 8 cm of the wet process frame material at the time of spraying is pumped through a pipe by a pump, and is fixed to the ground and opened upward from the spray nozzle at the tip of the pipe. with blown from above into the mold frame to, blowing air with an amount of 2 to 10 nm ³ / min in the middle of the conduit, we have proposed a method of blowing a legal frame material from the spray nozzle to entrain the air.

In this case, since the bulk density of the material itself is high, the weight of the sprayed material itself becomes heavy. In particular, the horizontal frame needs to be strong enough to withstand this. The present inventors have found that a punching metal is suitable for this high strength and sufficient release of air entrained in the spray material.

On the other hand, paying attention to the intersections of the formwork for constructing the formwork, the construction of the formwork intersects the formwork in the slope direction and the formwork in the horizontal direction. However, a lot of labor and time were required for formwork construction work.

SUMMARY OF THE INVENTION An object of the present invention is to provide an intersection formwork for constructing a legal form so that the formwork can be performed in a short time and efficiently.

[0012]

SUMMARY OF THE INVENTION The object of the present invention is to provide a method in which form plates are confronted at a predetermined interval, and the confronting (facing) form plates are connected to each other by a connecting material. A unit type intersection portion formwork assembled in a character shape, wherein the connection portions of adjacent formwork plates in which adjacent formwork plates are continuous at an intersection angle are respectively connected rotatably about a vertical axis. In addition, the problem can be solved in that the connection of the connecting member to the form plate is rotatable around a vertical axis, and the entire structure is freely foldable.

[0013] Further, the frame plates are opposed to each other at a predetermined interval, and the facing frame plates are connected to each other by a connecting material, and a unit-type intersection portion form frame assembled in a cross shape while providing a haunch is provided. And a connecting portion of each of the form plate units in which the adjacent form plates are interposed with the interposed haunch part form plate at an intersecting angle is connected rotatably around the vertical axis, respectively, The connection of the connecting member to the form plate is rotatable around a vertical axis, and one portion of the form plate on the intersection side from each connecting member is freely separable, so that it is freely foldable as a whole. It is.

Further, a punching metal having a large number of through holes is used as the form plate, and a rib is formed on the punching metal so as to be continuous along the longitudinal direction of the legal frame and project inward. A structure in which facing frame plates are connected to each other by a connecting material that locks into a through hole formed in each of the ribs is preferably adopted.

[0015]

The present invention has been described as the first invention,
In the case of a unit-type intersection portion formwork without a haunch, the connecting portions of the adjacent formwork plates are each rotatable around a vertical axis, and the connection of the connecting material to the formwork plate is performed on a vertical axis. By being rotatable around, the whole can be freely folded. Therefore,
The formwork at the intersection is pre-assembled in a factory or local work yard on a flat ground, and when constructing the formwork, it is only necessary to bring it on the slope where the legal form is to be constructed and install it. Work efficiency can be remarkably improved as compared with a case where an intersection part formwork having a complicated arrangement on a slope having poor working conditions is assembled.

Further, in the case of the unit type intersection portion formwork provided with the haunch described as the second invention, the connecting portions of the adjacent formwork plates are respectively turned around the vertical axis for the reason described later. It is not possible to fold with a configuration in which the connecting member is movably connected and the connection of the connecting member to the form plate is only rotatable. In this case, the further foldable by freely separating one part of the mold plate that exists at the intersection nearer than the connecting member.

On the other hand, by using a punching metal as the form plate, it becomes possible to spray the flowable legal form material proposed by the present applicant to a certain extent, and the form itself has strength. Therefore, the horizontal frame is not particularly deformed by the weight of the sprayed material.

In this case, by forming the ribs on the punching metal by molding, higher rigidity can be imparted, and the communication structure with the connecting member becomes simple and rational.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the construction of an embodiment of the present invention. FIG. 1 exemplifies a perspective view of the construction of a legal frame, in which a punching metal 20, 2
Zeros are installed in parallel in a slope direction and a horizontal direction at a predetermined interval, and are installed such that they are in a grid shape, for example. At the intersection, the unit-type intersection part formwork 1 according to the present invention is installed, and the punching metal 2
0, 20...

The formwork for constructing the legal form shown in the present embodiment is not a crimped wire mesh used in the free frame method, but has many small holes, for example, a punched metal 2
0 is preferably used. Various shapes can be used as the opening shape of the punching metal 20, and for example, a round hole, a long hole, a square hole, a diamond-shaped hole, a cross hole, or a combination thereof can be used. Round holes are sufficient. The aperture ratio is 25-60
%, Particularly preferably 30 to 45%. If the opening ratio is small, the amount of water released from the sprayed material is reduced, and the weight of the mold is increased, so that the portability to the site is deteriorated. Conversely, when the aperture ratio increases, the rigidity of the mold decreases, and in particular, the deformation increases in the horizontal mold. In addition, the amount of the sprayed material flowing out from the opening increases, and the effect of consolidating the material at the initial stage of spraying due to the outflow decreases. The diameter of the opening is preferably 5 to 12 mm. The thickness of the punching metal 20 is preferably 0.6 to 1.2 mm from the viewpoint of strength and the like.

As shown in FIG. 3, the punching metal 20 is continuous in the longitudinal direction of the legal frame and protrudes inward by, for example, press working at a factory production stage before being carried into the site. It is desirable to form the ribs 20a and 20b in advance. This rib should be at least
It is preferable to form them in steps or more. These ribs 20a, 20
The b gives the punching metal 20 rigidity in the longitudinal direction of the legal frame. The upper and lower edges of the punching metal 20 are provided for safety and rigidity during operation.
It is folded inward. The ribs 20a, 2a
In forming 0b, the rib formation position is determined so that a through-hole penetrating in the vertical direction is formed in the rib portion after molding. The rib shape may be an appropriate shape such as a triangular shape shown in FIG.

In order to assemble a mold using the punching metal 20, the punching metal 20 (hereinafter also referred to as a unit mold) is erected in parallel and adjacent to each other, and the opposing unit molds 20, 20 are connected to each other. , Steel rods or steel wires. The connecting member 21 of the embodiment is made of, for example, a steel wire, and is assembled in a girder shape by a reinforcing positioning member 24 and spot welding or a number line, and L-shaped hooks 21a to 21d are provided at the ends of each steel wire. The hooks 21a to 21d are formed with the ribs 20a of the punching metal 20,
20b... Are locked with the through holes formed in
0s are connected. If the number of ribs formed on the punching metal 20 is three, the number of steel wires horizontally disposed on the connecting member 21 is three. Also, at another place, the unit forms 20, 20 are connected to each other by the connecting material 21 as described above.
It can also be connected and then brought to the site in a folded state.

When arranging a reinforcing bar in a slope, it is difficult to insert a long reinforcing bar later, so that the lower reinforcing bars 22B, 22B are placed on the slope as shown by broken lines. After assembling the unit forms 20, 20 with the connecting member 21, the lower rebars 22B, 22B are lifted to the intersections of the connecting members 21 and fixed by a number line or the like. In addition, the upper rebar 22
A and 22A can be placed on the connecting member 21 later as shown in FIG.

On the other hand, in the present invention, the unit type intersection part forms 1 and 2 shown in FIGS. 5 and 6 are used as the intersection form forms of the legal form to be constructed.

FIG. 5 shows a unit-type intersection part formwork 1 of a haunchless type, and a rib 13 is used as a formwork plate.
A punched metal on which a and 13b are formed is used. The hinge plate 14, 1 and the mold plate 13A and the mold plate 13B
4, four form plate units 13 rotatably connected around a vertical axis are used, and each form plate unit 13A, 1 of adjacent form plate units 13 is bent in an L-shape.
It is assembled so as to face 3B at a predetermined interval and to form a cross shape as a whole. The facing frame plates 13A and 13A, 13B and 13B are mutually connected by connecting members 21, 21. As described above, the connecting member 21 is made of, for example, a steel wire, and is assembled in a girder shape by a reinforcing positioning member 24 and spot welding, a number line, etc., and includes a punching metal (form plate) 13A,
13B are locked in through holes formed in the ribs 13a, 13b,..., And the connection to the form plates 13A, 13B is rotatable about a vertical axis. As a result of the configuration described above, the unit-type intersection portion formwork 1 according to the present invention is freely foldable according to the folding procedure shown in FIG. In addition, the connecting members 21 arranged in each extending direction of the cross
Is not limited to one location, but may be a connection at a plurality of locations.

Next, FIG. 6 shows the unit-type intersection part form frame 2 with a haunch, and the ribs 15a, 15b
Forming plate 15A on which is formed, form plate 15B constituting the haunch part, and small form plate 15C are mutually hinged 1
4, 14 ... are rotatably connected around a vertical axis,
Also, a form plate unit 15 having a form plate 16 connected to the small piece form plate 15C by bolts 18 and 18, a form plate 17A on which ribs 17a and 17b are formed, and a mold forming a haunch portion. The frame plate 17B and the form plate 17C are hinges 14,
14, three form plate units 17, 17 are connected so as to be rotatable about a vertical axis, and each is folded in a polygonal shape as shown in FIG. , 15, ... at a predetermined interval, and assembled so that the shape of the formwork becomes a cross shape as a whole.
The facing frame plates 17A, 17C, 15A,... Are mutually connected by connecting members 21, 21,. The connecting member 2
1 denotes ribs 15a, 15b, 17a, 17b,.
To each of the form plates 17A, 1
7B, 15A... Are also rotatable about a vertical axis.

In the case of the hammered unit intersection section form frame 2 configured as described above, it cannot be folded as it is, as in the case without the haunch. In detail by FIG. 8 this was taken out by the enlarged view of a portion of a specific extension direction about the hinge points A of each mold plate unit 17, as a fixed point B, mold plates 17B, 17B Is folded as shown in the figure, as a result of the form plates 17C, 17C being connected by the connecting material 21, the form plate 1
Both 7C and 17C (shown) or one of them stands and cannot be folded. Therefore, in order to fold all the form plates in one plane, one of the fixing points A and B may be moved to change the distance between the fixing points. Therefore, as described above, the fixing point can be moved by making the form plate 15C and the form plate 16 of the form plate unit 15 separable by bolt connection, so that the whole can be folded. It has become. In this case, the separation position is set at one position on the inner side (intersection side) of each of the connecting members 21, 21,... In the form plate. Since the lower half (not shown) is divided, it can be folded.

In constructing a legal framework using the unit-type intersection formwork 1 and 2 described in detail above, first, a reinforcing bar 22B installed below the legal framework is placed on the slope where the legal framework is constructed. After placing, the unit-type intersection part forms 1 and 2 assembled in another place in advance are brought into each legal frame intersection and installed.
Next, as shown in FIG. 9, a general part method form that connects between the unit-type intersection part forms 2 and 2 is constructed by a form using punching metals 20 and 20, and the mold is formed in a lattice shape as a whole. Build a frame. As shown in FIG. 10, it is also possible to extend the extended portions of the unit-type intersection part forms 2 and 2 so as to communicate with each other.

When the setup is completed, as shown in FIG. 2, the worker carries the hose 10 and the spray nozzle 11 is directed toward the inside of the mold. The material M is sprayed while observing the filling state of the material.

As shown in FIG. 1, a vegetation sandbag 12 can be stacked, a vegetation base can be formed, a mortar can be sprayed, and the like, as shown in FIG.
Further, a wire mesh or the like may be laid on the target slope in advance.

[0031]

As described above, according to the present invention, since a unit-type intersection portion formwork which can be folded is provided, in constructing the formwork, a previously prepared intersection portion formwork is brought on a slope and installed. Therefore, the work is completed in a short time, and the work efficiency is significantly improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a construction state of a legal frame.

FIG. 2 is a perspective view of a spraying state of a spray material.

FIG. 3 is a cross-sectional view of a legal formwork.

FIG. 4 is a perspective view of a legal formwork.

FIG. 5 is a perspective view of a unit-type intersection part formwork according to the present invention without a haunch;

FIG. 6 is a perspective view of a unit type intersection part formwork according to the present invention with a haunch.

FIG. 7 is a view showing a folding procedure of the unit type intersection part formwork of FIG. 5;

FIG. 8 is an explanatory diagram of a folding procedure of the unit-type intersection portion formwork of FIG. 6;

FIG. 9 is a diagram showing an example of an assembly procedure of a legal formwork.

FIG. 10 is a view showing an example of an assembly procedure of a legal formwork.

[Explanation of symbols]

1.2 ... unit type intersection part formwork, 14 ... hinge, 13.1
5.17 ... form plate unit, 20 ... punching metal (unit form), 21 ... connecting material, 22A / 22B ... rebar

──────────────────────────────────────────────────続 き Continuing on the front page (72) Yoshiji Sugiyama 4-35, Kudankita, Chiyoda-ku, Tokyo Light industry Co., Ltd. (72) Takeo Ohgo 4-2-2, Kudankita, Chiyoda-ku, Tokyo 35 Light Industry Co., Ltd. (72) Inventor Masao Kima 4-35, Kudankita 4-chome, Chiyoda-ku, Tokyo Light Industry Co., Ltd. (72) Inventor Masanao Abe 4-2-35, Kudankita, Chiyoda-ku, Tokyo No. Light Industry Co., Ltd. (72) Inventor Junichi Inoue 4-2-235 Kudankita, Chiyoda-ku, Tokyo Light Industry Co., Ltd. (72) Inventor Tomoyuki Yamane 4-35, Kudankita, Chiyoda-ku, Tokyo Light Inside the Industrial Co., Ltd. (72) Kazuyuki Niwada 2-35, Kudankita, Chiyoda-ku, Tokyo Light Industrial Co., Ltd. (72) Yoshinori Mizutani Nagoya 2-10-12 Chikusa, Chikusa-ku Iseya Wire Mesh Industry Co., Ltd. (72) Inventor Tokugo Mizutani 2-10-12 Chikusa, Chikusa-ku Nagoya-shi Iseya Wire Mesh Industry Co., Ltd. (56) Kaihei 3-115141 (JP, U) Real Kaihei 3-125840 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) E02D 17/20 104

Claims (3)

(57) [Claims] A mold plate is opposed at a predetermined interval, and faces each other.
Mold plates are to have been connected by a connecting member to each other, without providing a haunch, a intersection portion formwork unitary assembled crosswise, adjacent mold plates to each other are continuous with a crossing angle The connecting portions of the adjacent form plates are rotatably connected to each other around the vertical axis, and the connection of the connecting member to the form plate is rotatable around the vertical axis,
An intersection part formwork for constructing a legal form, which is foldable as a whole. 2. A mold plate is opposed at a predetermined interval, confront
To mold plate to each other are connected by a connecting member to each other, while providing the haunch, a intersection portion formwork unitary assembled crosswise, mold to intermediate intervening haunch portion formwork plate adjacent The connecting portions of the form plate units in which the plates are connected at an intersection angle are connected rotatably around the vertical axis, and the connection of the connecting member to the form plate is rotatable about the vertical axis. Further, an intersection part formwork for constructing a legal form, characterized in that one part located on the intersection side of each of the connecting members of the formwork plate is separable and can be folded as a whole. 3. A punching metal having a large number of through-holes formed therein as said form plate, and ribs which are continuous along the longitudinal direction of the legal frame and which project inward are formed on said punching metal. 3. The crossing point formwork for constructing a legal form according to claim 1 or 2, wherein the form plates facing each other are connected by a connecting material which is engaged with a through hole formed in each of the ribs.