JPS624639Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a bolt body to be inserted into a blind hole with a bag body that closes the opening side of the blind hole by expanding its diameter by supplying a hardening filler. a tube that communicates the inner part of the bag with the outer space of the bag;
The present invention relates to an anchor bolt provided along the bolt body.

The above-mentioned anchor bolts are used, for example, to attach concrete segments for forming the tunnel's inner peripheral wall by setting them in a blind hole drilled in the ground on the inner periphery of a tunnel. The opening of the blind hole is closed by supplying the filling material, and the air in the blind hole space deeper than the bag body is exhausted through the tube, or the filling material is supplied to the blind hole space deeper than the bag body. This is what I did.

However, in the past, the tube was simply cut on both sides, so the drilling soil left in the blind hole and the soil broken by hitting the wall when inserting the bolt into the blind hole were removed from the blind hole. When the bolt was inserted into the hole, it entered the opening at the tip of the tube, blocking the opening and preventing air release or supply of filler material, posing a great danger of reducing the fixing strength of the bolt.

In view of the above-mentioned circumstances, the present invention aims to prevent clogging of the tube opening through extremely simple modification.

A structural feature of the present invention taken to achieve the object is that an opening is formed in the peripheral wall of the tube facing the bolt body on the side of the insertion tip side of the bag body. This configuration produces the following effects.

In other words, the opening of the tube for air venting or supplying filler material is drilled in a position where the opening surface is parallel to the insertion direction of the anchor bolt and faces the bolt body, so when inserting the anchor bolt, dirt and sand in front of the tube are drilled. Sediment on the sides does not enter the opening and cause clogging. In particular, we were able to rationally prevent clogging from entering the bolt from the sides by making effective use of the existing bolt body. Therefore, compared to the conventional method, the clogging of the tube opening has been drastically reduced, and good exhaust gas or filler supply has been ensured, and the reliability of the fixing strength of the anchor bolt has been improved.

Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 and 2 show an example of an anchor bolt that is applied to a wall surface in which a blind hole is bored upward or horizontally; An expandable cylindrical bag 3, such as a sheet, which closes the opening of the blind hole A by expanding its diameter by supplying the curable filler a, is attached at both ends by gluing, lashing, etc. With,
A first tube 4 for supplying the filler material a into the inside of the bag body 3, a second tube 5 for supplying the filler material a to the blind hole space on the back side of the bag body 3, and Third tubes 6 for air venting, which are open at both ends of the bolt body 2 and communicate the deep part of the blind hole space with the outside space of the bag body 3, are attached to the sides of the bolt body 2 by gluing, lashing, etc. installed on, and
On the peripheral wall of the third tube 6 on the back side of the blind hole space,
An opening c separate from the opening b at the tip of the tube is formed to constitute an anchor bolt to be set in a blind hole A drilled in the ground, rock, etc.

In the above configuration, the opening c is particularly formed in the peripheral wall portion of the tube 6 facing the bolt body 2.

Further, in the above embodiment, the second tube 5 is filled with the filler material a.
The third tube 6 is used for air venting, but depending on the direction of the blind hole A (for example, downward), the second tube 5 is used for air venting, and the third tube 6 is used for supplying the filler material a. Yes, you can.

FIG. 4 shows an example in which the first tube 4 is omitted and the second tube 5 has the function of the first tube 4. That is, by dividing the second tube 5 within the bag body 3 into a proximal pipe 5a and a distal pipe 5b, and forming a gap 7 between the proximal pipe 5a and the distal pipe 5b, the proximal pipe 5a The supplied filler a is first filled into the bag body 3 from the gap 7, and then is supplied to the blind hole space on the back side of the bag body 3 through the tip pipe 5b. 2nd tube 5
In addition to dividing the second tube 5, a cutout opening may be formed in the second tube 5, and this opening may be used to supply the filling material into the bag body 3 instead of the spacer.

Note that the opening b on the tip side may be closed. Further, the bag body 3 may have an annular shape in which an inner cylinder part in contact with the bolt body 2 and an outer cylinder part fitted onto the inner cylinder part are connected at both ends in the axial direction.

[Brief explanation of the drawing]

The drawings show an embodiment of the anchor bolt according to the present invention, and FIG. 1 is an overall perspective view, FIG. 2 is a cross-sectional view showing the anchor bolt in a set state, FIG. 3 is a cross-sectional view of the tip of the bolt, and FIG. 4 is a cross-sectional view of the bolt tip. FIG. 2 is a sectional view showing a set state of an anchor bolt according to another embodiment. 2...Bolt body, 3...Bag body, 6...Tube, A...Blind hole, a...Hardenable filler, c...Opening.

Claims (1)

[Scope of utility model registration request] The bolt body 2 to be inserted into the blind hole A is provided with a bag body 3 that closes the opening side of the blind hole A by expanding its diameter by supplying the hardening filler a, and the inner part of the blind hole space is covered with the bag. A tube 6 communicating with the outer space of the body 3
In the anchor bolt provided along the bolt body 2, an opening is bored in the peripheral wall portion of the tube 6 facing the bolt body 2 on the peripheral wall of the tube 6 on the insertion tip side relative to the bag body 3. Anchor bolts with special features.