JP2001262582A - Reinforcement holding material and execution work method using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement holding material eliminating complicated form assembling work and capable of securing the solidifying material driving thickness of a required reinforcement and an execution work method using it. SOLUTION: This invention for settling the problem provides this reinforcement holding material featured by having a holding part formed in a spiral shape and holding the reinforcement and a spacer part having a spiral outside dimension larger than this holding part in the reinforcement holding material for holding the reinforcement in a prescribed position and this execution work method using it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing bar holding material and a construction method using the same.

[0002]

In the case of constructing a formwork on a slope, there is a well-known technique of assembling a formwork, arranging a spacer inside and assembling a reinforcing bar, and placing concrete. In addition, when the slope is stable, a method has been proposed in which a wire mesh is provided on the slope, a reinforcing bar is assembled on the wire mesh in a grid, and the reinforcing bar is covered with a solidifying material to form a grid-like frame.

In the above-described method of assembling a formwork and a reinforcing bar, the necessary casting thickness (required covering thickness) of the reinforcing material of the reinforcing bar can be sufficiently secured, but the assembling work of the formwork and the reinforcing bar is complicated. Construction costs increase. In contrast, in the method of arranging reinforcing bars in a grid on a wire mesh stretched on a slope, there is no complicated assembling work of the formwork, but the reinforcing bars are grounded to the ground and the required thickness of the reinforcing material Is difficult to secure.

[0004] There is also a method of drilling holes in a slope, inserting a reinforcing bar such as an anchor or a lock bolt, injecting a solidifying material into the holes, and fixing the anchors to the ground. In this case, the thickness of the solidified material to be cast around the rebar placed in the anchor hole needs to secure a necessary cast thickness to obtain the required strength of the anchor. For this reason, a spacer is attached to the reinforcing bar and the reinforcing bar is arranged at the center of the anchor hole so that the arrangement position of the reinforcing bar in the anchor hole does not shift.

However, the conventional spacer has a disk shape, and a large number of such spacers are mounted on a reinforcing bar in a flange shape. Therefore, the fluidity of the solidified material in the anchor hole is deteriorated, and the solidified material is securely inserted without gaps. There was a possibility that the inside could not be filled. The present invention
It was made to solve the above problems

[0006]

In order to solve the above-mentioned problems, the present invention provides a reinforcing bar holding member for holding a reinforcing bar at a predetermined position, which is formed in a spiral shape and holds the reinforcing bar. Characterized by having a holding portion and a spacer portion having a larger spiral outer dimension than the holding portion.
Provide rebar holding material.

According to a second aspect of the present invention, there is provided a rebar holding material according to the first aspect, wherein the rebar holding material is configured to be freely expandable and contractible in an axial direction.

According to a third aspect of the present invention, in the reinforcing bar holding material according to the first or second aspect, the dimension from the reinforcing bar held by the holding portion to the outer peripheral edge of the spacer portion is cast around the reinforcing bar. Provided at a size substantially equal to the required casting thickness of the reinforcing bar.

According to a fourth aspect of the present invention, in the method for constructing a legal frame using the reinforcing bar holding material according to any one of the first to third aspects, the reinforcing bar is fixed on the slope while holding the reinforcing bar in the holding portion of the reinforcing bar holding material. The present invention also provides a method of constructing a legal frame using a reinforcing steel holding material, characterized in that a solidified material is poured around the reinforcing steel holding material to construct a legal framework.

According to a fifth aspect of the present invention, in the method for installing an anchor using the reinforcing bar holding member according to any one of the first to third aspects, the anchor is installed in the anchor hole while holding the reinforcing bar in the holding portion of the reinforcing bar holding member. The present invention also provides a method for constructing an anchor using a reinforcing steel holding material, characterized in that a solidified material is cast into an anchor hole for construction. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS <A> Reinforcing bar holding material As shown in FIG. 2, the reinforcing bar holding material 1 is formed in a spiral shape.
It has a holding portion 11 for inserting and holding a reinforcing bar, and a spacer portion 12 that is continuous with the holding portion 11 and has a larger spiral outer dimension than the holding portion 11. The reinforcing bar holding material 1 is used for the purpose of constructing a legal frame or anchoring, which will be described later, and may be used for various purposes for holding the reinforcing bar at a predetermined position.

The spiral outer dimension (spiral diameter) of the holding portion 11 is substantially equal to the outer diameter of the reinforcing bar to be inserted, and is formed so that the reinforcing bar can be inserted. On the other hand, the spacer portion 12 is, for example,
The dimension (spiral radius) from the reinforcing bar held by the holding portion 11 to the outer peripheral edge of the spacer portion 12 is determined by the required driving thickness of the solidified material such as mortar to be driven around the reinforcing bar (required strength of the frame). (The thickness required for casting to secure the thickness). In some cases, the spiral outer dimensions of the spacer portions 12 may be different.

The rebar holding material 1 is made of a flexible steel wire or the like, and is configured to be able to expand and contract in the axial direction as shown in FIGS. If it is in a contracted state, it can be easily transported. In addition, it is good also as a fixed type which does not expand and contract and is manufactured with a member with large rigidity.

In the present embodiment, three holding portions 11 and two spacer portions 12 are formed alternately and continuously at a constant interval. Is appropriately selected according to construction conditions and the like.
The number of turns of the spiral of the holding part 11 and the spacer part 12 is also appropriately selected according to the construction conditions and the like.

If the holding portion 11 and the spacer portion 12 are arranged so that their axes are located on a straight line, the rebar inserted into the holding portion 11 and held therein is positioned at the center of the rebar holding material 1. Placed in the department. Therefore, the difference between the spiral outer dimensions of the holding portion 11 and the spacer portion 12 is the required thickness of the solidified material.

If the axis of the holding portion 11 and the spacer portion 12 are shifted stepwise so as not to be located on a straight line, and the two are arranged so that the axis of the holding portions 11 is located on a straight line, The reinforcing bar may be arranged at a position eccentric with respect to the spacer portion 12. In this case, the spacer 12
May be formed in a state in which the axis of the spacers 12 is shifted stepwise.

Furthermore, the spiral shape of the reinforcing bar holding material 1 is circular as shown in FIG. 5, square as shown in FIG.
Other shapes may be used. In addition, a series of rebar holding materials 1
The holding portion 11 and the spacer portion 12 having different winding shapes, such as a circular holding portion 11 and a square spacer portion 12, may be formed. The cross-sectional shape of the solidified material to be cast can be easily changed according to the winding shape of the reinforcing bar holding material 1.

<B> Insertion of Reinforcing Bar As shown in FIG. 4, the reinforcing bar holding member 1 is extended, and the reinforcing bar 2 is inserted into the holding portion 11 in the axial direction and held. The rebar 2 is fixed to the rebar holding material 1 using a binding wire or the like, and both are integrated. Alternatively, a method may be used in which a wire or the like is spirally wound around the reinforcing bar 2 to form the reinforcing bar holding material 1 and the both are integrated.

<C> Method of constructing a method frame (1) Integration of a reinforcing bar and a reinforcing material holding material Next, a method of constructing a method frame using the reinforcing material holding material 1 configured as described above will be described. First, the reinforcing bar holding material 1 is
It is transported to the construction site in a contracted state as shown in FIG. 3 and integrated with the reinforcing bar 2 as described above.

(2) Fixing on a slope In this state, the apparatus is transported and installed on a slope, and is arranged in a grid or other shape. And as shown in FIGS.
It is fixed to an anchor 3 cast at a predetermined position such as an intersection using a binding wire or the like. If necessary, a wire mesh is previously installed on the ground.

(3) Casting of the solidified material Next, the solidified material 4 such as mortar is cast around the rebar holding material 1 by a spraying method or the like, which is a known technique, to construct the legal frame 41. At this time, if the solidified material 4 is sprayed along the spacer portion 12 of the reinforcing steel holding material 1, the necessary cast thickness (required covering thickness) of the solidified material can be ensured. Not required.

FIG. 5 shows a case where the winding shape of the reinforcing bar holding material 1 is formed in a circular shape. FIG. 6 shows a case where the winding shape of the reinforcing bar holding material 1 is formed in a square shape, and the cross section of the normal frame can be formed in a square shape.

As shown in FIG. 7, a plurality of reinforcing bars 2 may be inserted into the holding portion 11 or may be held outside the holding portion 11 by a binding wire or the like.

<D> Anchor Construction Method Next, an anchor construction method using the above-described reinforcing bar holding material 1 will be described. As shown in FIG. 8, the reinforcing member 2 such as an anchor and a lock bolt is held in the holding portion 11 of the reinforcing bar holding material 1 and is installed in the anchor hole 5.
A solidifying material 4 such as cement milk is poured into the inside and constructed.

In this case, the spacer 12 of the reinforcing bar holding material 1
The required external thickness of the solidified material 4 for setting the dimension (spiral radius) from the reinforcing bar 2 held by the holding unit 11 to the outer peripheral edge of the spacer unit 12 is set around the reinforcing bar. (The casting thickness necessary to obtain the required strength of the anchor)
It is formed to have dimensions approximately equal to.

In the case of anchoring, the anchor hole 5 is usually drilled with a minimum necessary hole diameter capable of securing a required thickness of the solidified material 4. Therefore, if the spiral outer dimension of the spacer portion 12 is formed to be substantially equal to the hole diameter of the anchor hole 5, the rebar 2 can be positioned at the center of the anchor hole 5, and the necessary casting of the solidified material 4 The thickness can be secured.

FIG. 9 shows the holding portion 11 of the reinforcing bar holding material 1.
In this case, the spiral outer shape is square, and the spiral outer shape of the spacer portion 12 is circular. In this example, a plurality of reinforcing bars 2 are inserted into the holding portion 11 and held.

[0028]

Since the present invention has been described above,
The following effects can be obtained. <B> The reinforcing bar can be constructed simply by inserting the reinforcing bar into the reinforcing bar holding material, fixing it to the slope, and spraying the solidified material. Therefore, it is possible to perform the work quickly and easily without the conventional assembling work of the formwork.

<B> Since the reinforcing bar can be held at a predetermined position by the reinforcing bar holding member, a sufficient thickness of the reinforcing material can be secured.

<C> By configuring the reinforcing bar holding member to be extendable and contractible, it can be easily transported in a state of being contracted to a small extent.

<D> By making the shape of the reinforcing bar holding member circular or square, it is possible to easily construct the cross-sectional shape of the legal frame into the same circular shape or square shape as the reinforcing bar holding member.

<E> When the reinforcing bar integrated with the reinforcing bar holding member is used as the anchor body, the reinforcing bar holding member has a spiral shape, so that the solidified material has a high fluidity in the hole, and the solidified material can be securely inserted without gaps. Can be filled into the holes. Therefore, the required durability of the anchor can be obtained.

[Brief description of the drawings]

FIG. 1 is an illustration of a construction method of the present invention.

FIG. 2 is an explanatory view of a reinforcing bar holding material of the present invention.

FIG. 3 is an explanatory view of a state in which the reinforcing bar holding material is contracted.

FIG. 4 is an explanatory view of a step of inserting a reinforcing bar into a reinforcing-bar holding material.

FIG. 5 is an explanatory view of a cross-sectional shape of a legal frame.

FIG. 6 is an explanatory view of a cross section of a legal frame.

FIG. 7 is an explanatory view of a cross-sectional shape of a legal frame.

FIG. 8 is an explanatory view of a method for installing an anchor according to the present invention.

FIG. 9 is a sectional view of the inside of the anchor hole.

Claims (5)

[Claims] 1. A rebar holding material for holding a rebar in a predetermined position, the rebar holding member being formed in a spiral shape, and having a holding portion for holding the rebar, and a spacer portion having a larger spiral outer dimension than the holding portion. Reinforcing bar holding material, characterized in that: 2. The rebar holding material according to claim 1, wherein the rebar holding material is configured to be able to expand and contract in the axial direction. 3. The reinforcing bar holding material according to claim 1, wherein a dimension from the reinforcing bar held by the holding portion to an outer peripheral edge of the spacer portion is set around the reinforcing bar. Reinforcing bar holding material characterized in that it is formed to have dimensions approximately equal to its thickness. 4. A method for constructing a method using a reinforcing bar holding material according to any one of claims 1 to 3, wherein the reinforcing bar is fixed on a slope while holding the reinforcing bar in a holding portion of the reinforcing bar holding material. A method of constructing a stake using rebar holding material, characterized in that a stiffened material is cast around the material and a stake is constructed. 5. An anchor installation method using a reinforcing bar holding material according to any one of claims 1 to 3, wherein the reinforcing bar is held in a holding portion of the reinforcing bar holding material in an anchor hole. A method for installing an anchor using a reinforcing steel bar, characterized by casting a solidified material into the inside.