JPH07233611A - Spray wall core body and manufacture thereof - Google Patents

Abstract

PURPOSE:To easily adjust the strength and thickness of a wall and improve the construction property by inserting a porous thin sheet body between two sheets of erected reinforcements to form a spray wall core body. CONSTITUTION:Vertical reinforcing bars 11a and horizontal reinforcing bars 11b of reinforcements 11 constituting a core body 10 are arranged at intervals into a lattice shape, intersections are welded to manufacture a welded wire net with a prescribed width, many isosceles triangular ridge sections 11A are formed in the vertical direction of the wire net, and the wire net is cut at a height into an erected reinforcing shape so that these vertexes are located on the same plane. A coarse braided fabric 12 manufactured at nearly the same length and width as those of the lattice-like reinforcements 11, it is put on the plane containing the ridge sections 11A of lattice-like reinforcements, another coarse braided fabric 12 is put on the plane containing the vertexes of the other ridge sections 11A, and two sheets of lattice-like reinforcements 11 and the coarse braided fabrics 12 are connected and integrated at multiple positions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray wall core used for constructing a wall of a structure and a method for manufacturing the same.

[0002]

2. Description of the Related Art In the conventional method of constructing a wall by spraying mortar, a core plate made of foamed resin and grid-like reinforcing bars arranged with gaps on both sides of the core plate are joined by reinforcing bars for sewing the core plate. To produce the core for the spray wall, place the core for the spray wall between the lower and upper beams or floors of the building, and use mortar made of a mixture of cement, aggregate, water, etc. as the core for the spray wall. Spraying, filling the gap between the core plate of the spray wall core and the grid-like reinforcing bar with mortar, and covering the outside of the grid-like reinforcing bar with mortar, and a mortar layer of a predetermined thickness on the outside of the spraying wall core. There is one that forms a wall to form a wall.

[0003]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention A spray wall core used in a conventional method of constructing a wall by spraying mortar has a core plate made of foamed resin and a grid-like reinforcing bar connected by a reinforcing bar for sewing the core plate. It is difficult to manufacture, and there is a drawback that it is difficult to adjust the strength of the wall by changing the thickness of the grid-shaped reinforcing bars and the spacing between the grids.
Also, since a thick foamed resin core plate is used for a part of the core body, the wall thickness becomes large, and even if the thickness of the mortar layer is increased to some extent, sufficient strength cannot be obtained. Is a material with low sound insulation, so there is a drawback that only walls with low sound insulation can be obtained. The problem to be solved by the present invention is to provide a core for a spraying wall that does not have the above-mentioned drawbacks of the core for a conventional spraying wall, in other words, the strength and thickness of the wall can be easily adjusted. The object is to provide a core for a spray wall capable of constructing a wall having high strength and good sound insulation with good workability, and a simple manufacturing method thereof.

[0004]

In order to solve the above problems, the present invention adopts the following constitution. According to the configuration of the present invention, in a spray wall core used for constructing a wall by spraying mortar, a thin porous sheet is sandwiched between two three-dimensional reinforcing bars, and the three-dimensional reinforcing bars and the sheet-shaped body are disposed. In the core body for a blow wall, which is connected by an appropriate connecting means. As a porous sheet,
For example, metal sheet such as metal lath, wire lath, punching metal, etc. are used.
Use a porous non-metal sheet. As the coarse knitted or woven fabric, for example, one made of plant fiber, synthetic fiber, glass fiber, carbon fiber, or the like is used. As the porous sheet-like body, one having a size and shape such that a large number of through holes do not easily pass through the mortar blown out from the nozzle is used.

In the core for a blown wall, for example, a three-dimensional reinforcing bar is manufactured such that the tops of a large number of convex portions on at least one side thereof are located on substantially the same plane. The sides with their tops on substantially the same plane face each other, and
A porous sheet-shaped body is sandwiched between a sheet of three-dimensional reinforcing bars, and the three-dimensional reinforcing bars and the sheet-shaped body are connected by an appropriate connecting means to manufacture. As appropriate connecting means, means such as welding, bonding, binding, connecting with a connecting ring, or the like can be used. The three-dimensional reinforcing bar is manufactured, for example, by bending a flat lattice reinforcing bar into a three-dimensional shape, or by connecting bent vertical and / or horizontal reinforcing bars, but other methods may be used. When a lattice-shaped reinforcing bar having a large number of ridges extending in the vertical direction or the horizontal direction is used as the three-dimensional reinforcing bar, the three-dimensional reinforcing bar can be easily manufactured. The shape of the ridge may be triangular, trapezoidal, or any other shape. The vertical dimension of the spray wall core is made to substantially match the floor height dimension, and the horizontal dimension (width) is determined in consideration of ease of handling. The core for the spray wall is
The lower part and the upper part are configured to be easily fixed to the lower and upper beams or the floor by appropriate means. Since the present invention can easily construct a high-strength wall, it can be applied not only to construction of a partition wall but also to construction of an outer wall of a building that requires high strength.

[0006]

EXAMPLE As shown in FIGS. 1 to 5, a core 10 for a spray wall of Example 1 is composed of three-dimensional lattice-shaped reinforcing bars 11 and a coarse woven cloth 12. Long vertical rebar (diameter 3.2 mm)
11a and a horizontal rebar (diameter 3.2 mm) 11b of a predetermined length are arranged in a grid pattern at intervals (50 mm), and at least a part of their intersections are joined by welding to form a long wire mesh of a predetermined width. Manufacture and form a large number of isosceles triangular ridges 11A at intervals in the longitudinal direction on this long welded wire mesh so that the tops of the isosceles triangles of the many ridges 11A are located on substantially the same plane P. A welding wire net having a large number of ridges 11A formed in the vertical direction is cut in accordance with the floor height dimension H to produce a grid-shaped reinforcing bar 11 that constitutes a three-dimensional reinforcing bar. The coarse knitted fabric 12 which becomes a porous thin sheet-like body is manufactured, for example, by cutting a cheesecloth into substantially the same length and width as the three-dimensional lattice-shaped reinforcing bar 11. A surface P including the top of the ridge portion 11A of one grid-like reinforcing bar
To one side of the rough knitted fabric 12 and the other side of the rough knitted fabric 12 is covered with the ridges 11 of the other grid-shaped reinforcing bar 11.
The surface including the top portion of A is applied, and the two grid-shaped reinforcing bars 11 and the coarse knitted fabric 12 are integrally connected at a plurality of points by an appropriate connecting (joining) means, and the core body 10 for a spray wall is formed. To produce. As the connecting (joining) means, bundling, bonding,
Connection with a connecting wheel [for example, C Ringer (trade name)],
Means such as welding can be used. For example, the lattice-shaped reinforcing bars 11 and the knitted fabric 12 are adhered to each other and then integrally connected by binding or connection by a connecting ring. 2 to 4
When the ridge portion 11A is formed so that the vertical reinforcing bar 11a is located at the top of the ridge portion 11A, the knitted fabric 12 can be properly sandwiched between the vertical reinforcing bars 11a at the top of the ridge portion 11A. The end portions on both sides of the core 10 for a spray wall are, for example, as shown in FIG.
As shown in, sandwiched by vertical reinforcing bars 11a located both sides of the edge of the coarse knitted fabric 12 to the end edge, an end portion 11b ₁ of the horizontal reinforcing bar 11b which is inclined to the outside of the longitudinal reinforcing bars 11a is located However, other shapes may be used. Even if the distance between the tops of the ridges 11A is three times the dimension between the vertical reinforcing bars 11a,
It may be four times or more.

A method of constructing a wall by spraying using the core body 10 of Example 1 will be described. As shown in FIG. 6, the joint piece 22 is planted in the lower and upper beams 21A and 21B of the reinforced concrete structure corresponding to the formation position of the outer wall of the building frame 20. If necessary, splice pieces on the columns. Then, a plurality of cores 10 for the spray wall are arranged between the beams 21A and 21B, and the reinforcing bars 11a, 11b of the core 10 for the spray walls are arranged.
The portions located at the center of the upper and lower portions of the above are joined to the projecting portion 22a by an appropriate joining means such as binding, welding, etc., and the blow wall core 10 is fixed to the beams 21A, 21B. Also, FIG.
As shown in, the upper part of the edge portion of the adjacent core 10 for the spray wall,
The connecting grid reinforcing bars 23 are applied to one or both sides of a plurality of places such as the lower part and the central part, and the connecting grid reinforcing bars 23 and the reinforcing bars 11a located outside the grid-shaped reinforcing bars 11 of the core 10 for the blow wall are provided.
1b is joined by an appropriate joining means such as welding or binding. As the connecting grid reinforcing bar 23, for example, one having the same thickness and spacing as the welding wire net for manufacturing the grid-shaped reinforcing bar 11 is cut into small pieces and used. Next, the worker Hm holds the spray nozzle N, and from one side of the core body 10 for a spray wall arranged between the beams 21A and 21B toward the mortar-attached core body 10, cement, aggregate, water, etc. Spray a mortar consisting of. The spray nozzle N is moved to the left, right, up, down, front and back, etc., with respect to the coarse knitted fabric 12 surface of the spray wall core 10 to spray mortar onto the entire surface on one side of the spray wall core 10.

[0008] The sprayed mortar is composed of the core 1
The coarse knitted and woven fabric 12 adheres to the small holes, yarns, and the like of the coarse knitted and woven fabric 12 and is covered with mortar. And
Reinforcing bars 1 located inside and outside the lattice-like reinforcing bars 11 of the core body 10 by spraying mortar on the portion covered with the mortar.
The mortar is continuously sprayed until the mortar layer 23a having a predetermined thickness is formed outside the reinforcing bars 11a and 11b located outside the lattice-shaped reinforcing bars 11 by filling the 1a and 11b.
When the mortar has been sprayed onto one side of the core 10 for a spray wall, the mortar is also sprayed on the other side of the core 10. Similarly, the coarse knitted fabric 12 is covered with mortar, and the reinforcing bars 11a and 1a located inside and outside the lattice-shaped reinforcing bar 11 are used.
1b is filled, and spraying of mortar is continued until the mortar layer 23b having a predetermined thickness is formed on the outside of the grid-shaped reinforcing bar 11. The mortar layer 2 having a predetermined thickness is provided on both sides of the core body 10.
An outer wall 24 which forms 3a and 23b and is shown by a two-dot chain line in FIG.
To complete. In the first embodiment, the strength and the thickness of the formed wall 24 are changed by changing the thicknesses of the reinforcing bars 11a and 11b and the height of the ridge portion 11A constituting the lattice-shaped reinforcing bar of the blow wall core 10. Can be easily adjusted. Further, the mortar attached to one side of the coarse knitted fabric 12 and the mortar attached to the other side are coarse knitted fabric 1
It is firmly integrated through the mortar that has entered the 2nd hole. The spraying of the mortar may be performed by a dry spraying method or a wet spraying method.

As shown in FIGS. 7 to 10, the spray wall core 10 of the second embodiment is composed of a three-dimensional lattice reinforcing bar 11 and a metal lath 13. Long vertical rebar (diameter 2.6m
m) 11a and horizontal rebars (diameter 2.6 mm) 11b of a predetermined length are arranged in a grid pattern at intervals (50 mm), at least a part of their intersections are joined by welding, and long welding of a predetermined width is performed. A wire net is manufactured, and a large number of trapezoidal ridges 11A are formed at intervals in the longitudinal direction on this long welded wire net.
The flat top of the trapezoid is located on substantially the same plane P, and the welded wire mesh in which a large number of ridges 11A are formed in the vertical direction is cut according to the floor height dimension H to form a three-dimensional reinforcing bar. The bar-shaped reinforcing bar 11 is manufactured. The metal lath 13 that is a thin sheet-like body having a porous structure is manufactured, for example, by cutting a metal lath having a hole that is not so large to have substantially the same length and width as the lattice-shaped reinforcing bars 11. As the metal lath 13, a metal lath having a through hole having a size and a shape such that the mortar blown out from the nozzle cannot easily pass therethrough. On the surface P including the flat top portion of the ridge portion 11A of the one grid-shaped reinforcing bar 11,
Touch one side of the metal lath 13
The surface including the flat apex of the ridge 11A of the other grid-shaped reinforcing bar 11 is applied to the other surface of the two, and the two grid-shaped reinforcing bars 11 and the metal lath 13 are integrated at a plurality of locations by appropriate connecting (joining) means. Then, the core body 10 for a spray wall is manufactured. As the connecting (joining) means, it is possible to use means such as welding, binding, connecting with a connecting ring [for example, C Ringer (trade name)], and bonding.

As shown in FIG. 8, the ridge portion 11A may be formed so that the vertical reinforcing bar 11a is located below the flat top portion of the ridge portion 11A, or on the upper side of the flat top portion of the ridge portion 11A. The ridge portion 11A may be formed so that the horizontal reinforcing bar 11b is located. The ends on both sides of the core 10 for a spray wall are, for example, as shown in FIG.
As shown in, the horizontal rebar 1 is attached to both sides of the end of the metal lath 13.
1b end 11b ₁ are in contact, the lateral reinforcing bar 11b ends 11b ₁
So that the two vertical rebars 11a are located outside the
Other shapes may be used. The space between the flat tops of the ridges 11A of the three-dimensional lattice-shaped reinforcing bar 11 shown in FIG. 8 is three times the dimension between the adjacent vertical reinforcing bars 11a, but the dimension between the adjacent vertical reinforcing bars 11a is large. 4 times or more. Since the method of using the core 10 for a spray wall of the second embodiment is the same as that of the first embodiment, the description thereof will be omitted. When the metal lath 13 is used as the porous thin sheet-like body like the core 10 for sprayed wall of the second embodiment, the metal lath 13 reinforces the concrete of the wall, so that the lattice-shaped reinforcing bar made of thin vertical and horizontal reinforcing bars 11a and 11b. The core body 10 for blown walls can be manufactured by using 11, and the grid-shaped reinforcing bar 11 and the metal lath 13 can be easily integrated by welding, binding, or connection by a connecting ring. Further, the mortar adhered to one side of the metal lath 13 and the mortar adhered to the other side are firmly integrated via the mortar entering the holes of the metal lath 13. Although the ridge portion 11A of the three-dimensional lattice-shaped reinforcing bar is formed in the vertical direction in the first and second embodiments, the ridge portion 11A may be formed in the horizontal direction.

[0011]

The present invention has the following effects (a) to (e) by having the structure described in the claims. (A) In the core body for a spray wall according to claim 1, a porous thin sheet-shaped body is sandwiched between two three-dimensional reinforcing bars, and the three-dimensional reinforcing bars and the sheet-shaped body are connected by an appropriate connecting means. Since they are manufactured by connecting them, the mortar attached to both side surfaces of the porous thin sheet-like body can be firmly integrated through the mortar in the holes, and the wall strength or thickness is , It can be easily adjusted by changing the thickness and spacing of the reinforcing bars of the three-dimensional reinforcing bars and the strength of the sheet (sheet thickness, etc.) or the thickness of the three-dimensional reinforcing bars, so that a wall with the desired strength and thickness can be easily constructed. it can. Further, since a thick foam resin core plate is not used unlike the conventional spray wall core body, it is possible to construct a thin wall and easily construct a wall having the same sound insulation performance as a mortar wall of the same wall thickness. You can (B) In the core body for a spray wall according to claim 2, since the porous sheet-like body is formed of a metal sheet-like body such as a metal lath, wire lath, punching metal, etc. The strength or thickness of the wall to be constructed can be easily adjusted only by changing the strength of the sheet-like body or the thickness of the three-dimensional reinforcing bar, and a wall having a desired strength and thickness can be easily constructed. Further, the three-dimensional reinforcing bar and the porous sheet-like body can be easily integrated by welding, bundling, connection with a connecting ring, or the like. (C) In the core body for a spray wall according to claim 3, since the porous sheet-shaped body is composed of a coarse knitted woven fabric, a porous non-metallic sheet-shaped body, etc. By changing the thickness of the rebar, you can adjust the strength or thickness of the wall to build,
A wall of desired strength and thickness can be easily constructed. Also, the connection between the three-dimensional reinforcing bar and the porous sheet-shaped body becomes easy. (D) In the method for producing a core for a blown wall according to claim 4, the three-dimensional reinforcing bar is manufactured such that the tops of a large number of convex portions on at least one side of the three-dimensional reinforcing bar are located on substantially the same plane. The three-dimensional reinforcing bars and the sheet-shaped body are sandwiched by the two three-dimensional reinforcing bars so that the sides of the convex portions of the three-dimensional reinforcing bars on substantially the same plane face each other. Since it is manufactured by connecting and using the appropriate connecting means, the core for the spray wall can be manufactured by a simple work of stacking and connecting the three-dimensional reinforcing bar and the porous sheet-like body, and the core for the spray wall is inexpensive. Can be provided at. (E) As described in claim 5, when a three-dimensional lattice-shaped reinforcing bar having a large number of appropriately shaped ridges extending in the longitudinal direction or the horizontal direction is used as the three-dimensional reinforcing bar, the three-dimensional reinforcing bar adheres to a porous sheet-like body. An easy three-dimensional reinforcing bar can be easily manufactured, the thickness of the three-dimensional reinforcing bar can be easily adjusted, and a core for a blown wall capable of constructing a wall having a desired strength can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a perspective view of a part of a core for a spray wall according to a first embodiment.

FIG. 2 is a plan view of a main part of a three-dimensional lattice-shaped reinforcing bar of Example 1.

FIG. 3 is a plan view of a part of the core for a spray wall of Example 1.

FIG. 4 is a plan view of an end portion of the core for a spray wall of Example 1.

FIG. 5 is a front view of a core for a spray wall, the ends of which are joined together by the connecting grid reinforcing bars of the first embodiment.

FIG. 6 is a side view of a core for a spray wall and the like attached to a building under construction according to the first embodiment.

FIG. 7 is a perspective view of a part of the core for a spray wall of the second embodiment.

FIG. 8 is a plan view of a main part of a three-dimensional lattice-shaped reinforcing bar according to the second embodiment.

FIG. 9 is a plan view of a part of the core for a spraying wall of the second embodiment.

FIG. 10 is a plan view of an end portion of the core for a spray wall of Example 2.

[Explanation of symbols]

10 Core for spray wall 11 Lattice reinforcing bar 11a Vertical reinforcing bar 11b Horizontal reinforcing bar 11b ₁ End of horizontal reinforcing bar 11A Ridge part 12 Coarse weaving cloth 13 Metal lath 20 Building 21A Lower beam 21B Upper beam 22 Joining piece 22a Projecting part 23 Connection Lattice Reinforcing Bars 23a, 23b Mortar Layer 24 Outer Wall H Floor Height Dimension P Plane Including Top of Ridge

Claims (5)

[Claims] 1. In a core for a spray wall used for constructing a wall by spraying mortar, a thin porous sheet is sandwiched between two three-dimensional reinforcing bars to form the three-dimensional reinforcing bars and the sheet. Are connected by an appropriate connecting means. 2. The core for a spray wall according to claim 1, wherein the porous sheet-like body is formed of a metal sheet-like body such as a metal lath, wire lath, punching metal or the like. 3. The core for a spray wall according to claim 1, wherein the porous sheet-shaped body is composed of a coarse knitted fabric or a porous non-metal sheet-shaped body. 4. A three-dimensional reinforcing bar is manufactured so that the tops of a large number of convex portions on at least one side thereof are located on substantially the same plane, and the tops of the convex portions of the three-dimensional reinforcing bar are on substantially the same plane. For a spray wall, characterized in that two side-by-side faces are faced to each other and a porous sheet-like body is sandwiched by two three-dimensional reinforcing bars, and the three-dimensional reinforcing bars and the sheet-shaped body are connected by an appropriate connecting means. Manufacturing method of core. 5. A method for producing a core for a blow wall, comprising using as the three-dimensional reinforcing bar a three-dimensional lattice-shaped reinforcing bar having a large number of appropriately shaped ridges extending in the vertical or horizontal direction.