JPH07166609A - Erecting method for rodform substance - Google Patents

Abstract

PURPOSE:To prevent the change of the posture and the position of a rob-form substance, to reduce the occurrence of the damage of a concrete building, to reduce a construction cost, and to provide a strength high enough to allow endurance with a heavy object. CONSTITUTION:A split 27a and a shaft hole 27b are formed in the tip part of a rod-form substance 27 embedded in an erecting state in concrete 10 and a wedge-form member 31 is fitted in a shaft hole 27b. A hole 10a for embedding having diameter larger than the outside diameter of the rod-form substance 27 and depth responding to the embedding length of the rod-form substance 27 is formed in the concrete 10. The rod-form substance 27 is inserted in the hole 10a for embedding until the tip part thereof is brought into collision. By axially exerting a force, the wedge-form member 31 enters a shaft hole 27b and by bringing the outer peripheral surface of the rod-form substance 27 being the entering substance into pressure adhesion to the peripheral surface of the hole 10a for embedding, the posture and the position of the rod-form substance 27 are fixed. A gap around the rod-form substance 27 in the hole 10a for embedding is filled with a synthetic resin adhesive 33 having high adhesion to the concrete 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rod-like object erection method used for erection of an anchor bolt or other rod-like object in a concrete building.

[0002]

2. Description of the Related Art Conventionally, an anchor bolt is erected as shown in FIG.
As shown in, the upper end of the anchor bolt 7 faces the concrete structure 1, and the lower end thereof is inserted into the embedding hole 1a drilled in the concrete structure 1, and then the embedding hole 1a. The synthetic resin adhesive 13 is injected and fixed in the gap around the anchor bolt 7 inside.

[0003]

However, in such a conventional method of standing a rod-shaped object, the anchor bolt 7 is used.
Is an embedding hole 1a formed in the concrete structure 1.
Inject the synthetic resin adhesive 13 into the gap between the
Since the anchor bolt 7 is fixed when the synthetic resin adhesive 13 is solidified, it takes time until the synthetic resin adhesive 13 solidifies, which is contrary to the request for shortening the construction period, and the anchor resin 7 is solidified before the synthetic resin adhesive 13 solidifies. Due to the gap C (see FIG. 7A) between the bolt 7 and the peripheral surface of the embedding hole 1a, the posture of the anchor bolt 7 which was vertical until then tilts and falls (see FIG. 7B). The position of the upper end of the bolt 7 may deviate from the planned position and construction may not be possible. To prevent this, some means should be used to prevent the anchor bolt 7 from tilting until the synthetic resin adhesive 13 is solidified. There was a problem that I had to support them all the time.

Another conventional method for erected a rod-shaped material is disclosed in Japanese Patent Publication No. 56-44216, but in this conventional example, concrete is drilled in order to fill the spherical aggregate. You have to make the hole larger. For this reason, in the case of a concrete building, there is a risk that the damage will be large and the strength will be insufficient. In addition, the amount of adhesive synthetic resin filled in the holes is increased, and an extra material such as a spherical aggregate is required, which leads to an increase in construction cost.

There is also a dry standing method which does not use a synthetic resin for adhesion as in the above-mentioned conventional example. For example, FIG. 8 (a)
As shown in FIG. 4, four cracks 17a are formed in a cross shape in the radial direction at the tip of the anchor bolt 17 having the shaft hole 17b, and the shaft hole 17b of the anchor bolt 17 has a truncated cone-shaped member. 21 is fitted.

When the anchor bolt 17 is embedded in the concrete structure 1, a hole is formed in the concrete structure 1 so that the outer periphery of the anchor bolt 17 can fit into the concrete structure 1, and the hole is struck in the hole. Insert the tip of the anchor bolt 17 until the anchor bolt 17 that protrudes out of the hole.
By applying a force to the rear end portion in the axial direction, the wedge-shaped member 21 enters the shaft hole 17b while opening the crack 17a at the front end portion of the anchor bolt 17 (see FIG. 8B).

At this time, since the wedge-shaped member 21 enters while expanding the shaft hole 17b, the diameter of the outer periphery of the anchor bolt 17 is also expanded and the outer peripheral surface is crimped to the peripheral surface of the hole. 17 is fixed in the hole.

However, such a method of erection of a dry rod-like object which does not use a synthetic resin for adhesion is suitable for fixing a small and simple part in a hole, and for example, a handrail of a veranda. There is a problem that it cannot be used for a heavy object such as a pillar because it cannot withstand the strength.

Therefore, the present invention prevents the posture and the position of the rod-like object from changing, reduces damage to the concrete building,
It is an object of the present invention to provide a method of standing a rod-shaped object which can reduce the construction cost and can sufficiently withstand the strength of a heavy object.

[0010]

In order to solve the above-mentioned problems, a method of standing up a rod-shaped article according to the present invention is to form a crack and a shaft hole at the tip of the rod-shaped article to be erected by being embedded in concrete. , Fitting a wedge-shaped member into the shaft hole, and drilling a hole for embedding in the concrete having a diameter larger than the outer diameter of the rod and having a depth corresponding to the embedding length of the rod,
By inserting the tip of the rod-shaped object into the embedding hole until it hits and applying a force in the axial direction, the wedge-shaped member enters the shaft hole to embed the outer peripheral surface of the rod-shaped object at the entry portion. By fixing the posture and position of the rod-shaped object by pressure-bonding to the peripheral surface of the hole, a liquid synthetic resin adhesive having good adhesiveness to concrete is filled in the gap around the rod-shaped object in the embedding hole. To do.

[0011]

According to the method of standing the rod-shaped article of the present invention as described above, a crack and a shaft hole are formed at the tip of the rod-shaped article, and
A wedge-shaped member is fitted in the shaft hole, and a rod-shaped member is inserted into the embedding hole until it abuts and a force is applied in the axial direction, whereby the wedge-shaped member expands the crack and the shaft hole, The diameter of the rod-shaped object expands and the outer peripheral surface of the rod-shaped object is pressure-bonded to the peripheral surface of the embedding hole, and the pressure-bonding force can be used to fix the posture and position of the rod-shaped object until the synthetic resin adhesive solidifies. it can.

For this reason, like the conventional anchor bolt, the rod-like object tilts in the embedding hole due to the clearance around it until the synthetic resin adhesive injected between the embedding hole and the peripheral surface of the embedding hole is solidified. It is possible to reliably prevent the upper end position from deviating from the expected position.

Further, since it is not necessary to form a large hole for inserting a spherical aggregate into concrete unlike the conventional example according to the above publication, damage to a concrete building can be reduced. Further, unlike the conventional example, it is not necessary to use a large amount of the adhesive for filling the holes, and an extra material such as a spherical aggregate is not necessary, so that the construction cost can be prevented from increasing.

Further, in the method of standing the rod-shaped object according to the present invention, since the periphery of the anchor bolt is firmly adhered by the adhesive as well, it is possible to exert the strength enough to withstand a heavy object such as a handrail pillar. You can

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 are views showing an embodiment of a method of standing a rod-shaped object according to the present invention. FIG. 1 is a view showing a tip portion of the anchor bolt 27 (rod-shaped object).

In FIG. 1, a shaft hole 27b is formed at the tip of the anchor bolt 27 (see FIG. 1 (a)), and four cracks 27a are formed in a radial cross shape (see FIG. 1 (a)). See FIG. 1B). Anchor bolt 2 like this
A truncated cone-shaped wedge-shaped member 31 is fitted into the shaft hole 27b at the tip of the No. 7 connector. The wedge-shaped member 31 has the shaft hole 27b.
Since the diameter of the other end surface 31b protruding outside the shaft hole 27b is larger than that of the one end surface 31a fitted inside, the side surface 31c is formed in a conical shape.

Such anchor bolts 27 are prepared so that a gap (indicated by symbol C in FIG. 5) is formed around the outer diameter of the anchor bolt 27 in the concrete structure 10 as shown in FIG. Anchor bolt 2 with a diameter of
An embedding hole 10a having a depth corresponding to the embedding length of 7 is formed. Then, as shown in FIG. 3, the anchor bolt 2
The anchor bolt 27 is inserted into the embedding hole 10a until the other end surface 31b of the wedge-shaped member 31 at the tip end of 7 hits the abutment surface 10b.

Next, the rear end of the anchor bolt 27 (the upper end in the figure) is hit with a wood hammer, a soft metal hammer, or a shock absorbing hammer to deform the rear end of the anchor bolt 27. Without applying a force in the axial direction. Then Fig. 4
As shown in, the wedge-shaped member 31 enters the shaft hole 27b while pushing open the crack 27a of the anchor bolt 27.

Therefore, the side surface 31c of the wedge-shaped member 31 is formed.
Expands the diameter of the shaft hole 27b to expand the diameter of the outer peripheral surface of the anchor bolt 27, and the outer peripheral surface of the expanded anchor bolt 27 is crimped to the peripheral surface of the embedding hole 10a of the concrete structure 10. . Due to the crimping force at this time, as shown in FIG. 5, the anchor bolt 27 does not tilt its posture even if there is a clearance C around the anchor bolt 27, and therefore the upper end portion of the anchor bolt 27 also shifts from the expected position. Is prevented.

Then, as shown in FIG. 6, a gap around the anchor bolt 27 is filled with a synthetic resin adhesive 33, and the filled synthetic resin adhesive 33 is solidified after a predetermined time, so that the anchor bolt 27 has a hole for embedding. It is fixed in 10a. During the fixed time until the synthetic resin adhesive 33 solidifies, the anchor bolt 27 is held as it is without changing its posture and position by the above-mentioned pressure bonding force.

Although the anchor bolt 27 is erected in the above embodiment in the case of erecting a handrail, for example, the present invention is not limited to this, and the present invention is not limited to any other rod shape. It goes without saying that it can be applied to things.

[0022]

As described above, according to the present invention, a crack and a shaft hole are formed at the tip of a rod-shaped object, and a wedge-shaped member is fitted in the shaft hole to provide a rod-shaped object for embedding. The wedge member expands the crack and the shaft hole by inserting it to the hole until it hits and the axial hole expands, the diameter of the rod expands, and the outer peripheral surface of the rod becomes the peripheral surface of the embedding hole. It is possible to fix the synthetic resin adhesive so that the posture and the position of the stick-like object do not change until the synthetic resin adhesive is solidified.

For this reason, like the conventional anchor bolt, the rod-like object tilts in the embedding hole due to the gap around the embedding hole until the synthetic resin adhesive injected between the anchor hole and the peripheral surface of the embedding hole is solidified. It is possible to reliably prevent the upper end position from deviating from the expected position.

Further, since it is not necessary to form a large hole for inserting a spherical aggregate into concrete as in the conventional example according to the above publication, damage to a concrete building can be reduced. Further, unlike the conventional example, it is not necessary to use a large amount of the adhesive for filling the holes, and an extra material such as a spherical aggregate is not necessary, so that the construction cost can be prevented from increasing.

Further, in the method of standing a rod-shaped object according to the present invention, since the periphery of the anchor bolt is firmly adhered also by the adhesive, it is possible to exert a strength enough to withstand a heavy object such as a handrail pillar. You can

[Brief description of drawings]

FIG. 1 (a) is a view showing a tip end portion of an anchor bolt 27 according to an embodiment of a rod-like object used in a method of standing up a rod-like object according to the present invention, and FIG. 1 (b) is a diagram showing FIG. 1 (a). ) Is a front view of the tip end surface of the anchor bolt 27 shown in FIG.
1 is a top view of the wedge-shaped member 31 shown in FIG.
It is a bottom view of the wedge-shaped member 31 shown in (a).

FIG. 2 is a cross-sectional view showing an embedding hole 10a formed in a concrete structure 10 embedding a tip portion of an anchor bolt 27 shown in FIG. 1 (a).

3 is a cross-sectional side view showing a state in which a tip end portion of an anchor bolt 27 is inserted into the embedding hole 10a shown in FIG.

FIG. 4 is a cross-sectional side view showing a state in which a force is applied in the axial direction of the anchor bolt 27 so that the outer peripheral surface of the tip end thereof is pressed against the peripheral surface of the embedding hole 10a.

FIG. 5 is a cross-sectional side view showing the anchor bolt 27 in a state in which its posture and position are fixed in the embedding hole 10a.

FIG. 6 is a cross-sectional side view showing a state in which a gap around the anchor bolt 27 in the embedding hole 10a is filled with a synthetic resin adhesive 33.

FIG. 7 (a) is a sectional side view showing a state in which the tip of the anchor bolt 7 is embedded and fixed in the embedding hole 1a of the concrete structure 1, and FIG. 7 (b) shows the anchor bolt 7 in the final state. FIG. 3 is a cross-sectional side view showing a state in which it is tilted before being fixed to.

FIG. 8 (a) is a view showing a tip portion of an anchor bolt 17 used in a conventional dry standing method, and FIG. 8 (b) is a tip portion of the anchor bolt 17 by applying a force in the axial direction. FIG. 6 is a cross-sectional side view showing a state in which the outer peripheral surface of is pressed against the peripheral surface of the hole of the concrete structure 1.

[Explanation of symbols]

 1,10 Concrete structure 1a, 10a Hole for embedding 7,17,27 Anchor bolt 10b Abutment surface 13,33 Synthetic resin adhesive 17a Crack 17b Shaft hole 21,31 Wedge-shaped member 27a Crack 27b Shaft hole 31a One end surface 31b Other end surface 31c Side surface

Claims (1)

[Claims] 1. A crack and a shaft hole are formed at a tip end portion of a rod-shaped object to be erected by being embedded in concrete, and a wedge-shaped member is fitted in the shaft hole, and the concrete is more than an outer diameter of the rod-shaped member. By drilling a hole for embedding with a large diameter and a depth corresponding to the embedding length of the rod-shaped object, inserting until the tip of the rod-shaped object hits the hole for embedding and applying a force in the axial direction The wedge-shaped member enters the shaft hole and presses the outer peripheral surface of the rod-shaped object at the entrance portion to the peripheral surface of the embedding hole to fix the posture and position of the rod-shaped object, and the inside of the embedding hole A method of standing a rod-shaped object, characterized in that a liquid synthetic resin adhesive having good adhesiveness to concrete is filled in a gap around the rod-shaped object.