JPS6234920B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for embedding anchor bolts in a hole in a base such as a rock or a structure.

Conventionally, in order to bury an anchor bolt, the anchor bolt and a fixing agent such as cement milk or synthetic resin adhesive are inserted into the hole, and the anchor bolt is fixed in place. It took a considerable amount of time for the anchor bolts to solidify, so it was not possible to tension the anchor bolts and apply prestress. Also, to apply prestress,
Another method is to fix the tip of the anchor bolt in the hole, tension the anchor bolt, and then inject a fixing agent into the hole in the hole, but this method requires many steps and is time consuming. In other words, the drawback was that construction could not be carried out quickly.

The present invention overcomes the conventional drawbacks as mentioned above,
It is an object of the present invention to provide a method for smoothly, simply and quickly burying anchor bolts with prestress introduced therein.

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

The major features of the present invention are that two types of fixing agents with different properties, a rapid setting adhesive and a delayed expansion adhesive, are used as fixing agents for fixing anchor bolts, and these two types of fixing agents are used as fixing agents for fixing anchor bolts. When storing the adhesives separately in containers and inserting the fixing agent into the perforation, place the fast-setting adhesive first;
This should be done after the delayed expansion adhesive.

As the quick setting adhesive, for example, a polyester or epoxy resin is used, and as the delayed expansion adhesive, for example, urethane resin is used.

The above rapid setting adhesive 1 and delayed expansion adhesive 2
are housed in sealed containers 3, respectively. In the illustrated embodiment, these two types of adhesives 1 and 2 are attached to a partition wall 4 provided in one container 3.
Accordingly, one chamber accommodates a quick setting adhesive 1, and the other chamber accommodates a delayed expansion adhesive 2. However, the storage of these two types of adhesives is not limited to the above embodiment; for example, the two types of adhesives may be stored in separate containers.

In this case, if the container 3 is color-coded or labeled appropriately depending on the adhesive contained therein, it will be convenient to prevent mistakes in the order of insertion into the perforation 5, which will be described later. It is.

Further, the container 3 is made of a material that can be crushed by inserting an anchor bolt or the like into the perforation. For example, a synthetic resin material made of glass, vinyl chloride resin, polyethylene resin, or other synthetic resin mixed with a filler to make it suitably brittle is suitable.

When burying the anchor bolts 6 in the borehole 5, first, the container 3 containing the above two types of adhesives 1 and 2 is inserted into the deepest part of the borehole 5. The insertion order of agents 1 and 2 must be correct. That is, when the adhesives 1 and 2 are housed in the same container 3 as shown in FIG. Furthermore, in the case where adhesives 1 and 2 are stored in separate containers, the container containing quick-setting adhesive 1 must be inserted first, followed by the container containing slow-setting adhesive 2. It won't happen.

When the container 3 is inserted as described above, the anchor bolts 6 are subsequently inserted into the boreholes 5. The anchor bolts 6 preferably have a sharp tip 7 for conveniently crushing the container 3, and have an external thread 8 at the rear end.
is screwed on. Then, the container 3 is crushed by the impact caused by the insertion of the anchor bolts 6, and each of the adhesives 1 and 2 flows out from the container 3. In this case, if the anchor bolt 6 is rotated at the same time as it is inserted, the spilled adhesive will be stirred and the perforation will be evenly filled, and the crushing of the container 3 will be effective and the crushed container will be The small pieces No. 3 are evenly mixed with the adhesive and have the effect of acting as an aggregate, which can help uniformly strengthen the adhesive strength.

When the adhesives 1 and 2 flow out, the quick-setting adhesive 1 fills the gap 9 between the tip of the anchor bolt 6 and the perforation 5 and rapidly solidifies, thereby firmly fixing the anchor bolt 6. become.

Further, the slow-expanding adhesive 2 itself flows very slowly and expands to fill the void 9.

When the anchor bolt 6 is fixed with the quick-setting adhesive 1, the washer 10 is inserted into the anchor bolt 6 and brought into contact with the hole outer wall 11, and the nut 12 is screwed onto the external screw 8 and tightened. Tighten the anchor bolt 6. Then, the slow-expanding adhesive 2 gradually expands and flows to fill the space 9, and is eventually solidified.
The entire area of the anchor bolt 6 in the borehole 5 is covered with adhesives 1 and 2, and the anchor bolt 6 is completely fixed in the borehole 5 under prestress.

Although the present embodiment has illustrated the case where an anchor bolt is used as the anchor bolts 6, the present invention is not limited to this, and instead of this anchor bolt, for example, a single wire or a plurality of wires may be used. It is also possible to use a wire bundle etc. bound together.

As described above, the present invention uses two types of adhesives with contradictory properties, a quick-setting adhesive and a slow-expanding adhesive, as a fixing agent, and stores them in separate containers. The anchor bolt is inserted by inserting the adhesive into the hole with the adhesive on the front side and the delayed expansion adhesive on the rear side, so anchor bolts with prestress can be buried quickly and with fewer work steps. Extremely simple, reliable and inexpensive,
It has many excellent effects, such as improved workability and significant reductions in construction period, construction costs, and labor.

[Brief explanation of the drawing]

The drawings show how the present invention is carried out, and FIG. 1 is a cross-sectional view of the state in which adhesive is inserted into the hole,
The figure is a cross-sectional view showing the process of inserting the anchor bolt, and Figure 3 is a cross-sectional view of the state in which the anchor bolt is tightened.
FIG. 4 is a sectional view showing a state in which the anchor bolt has been completely buried. DESCRIPTION OF SYMBOLS 1... Rapid setting adhesive, 2... Delayed expansion adhesive, 3... Container, 5... Perforation, 6... Anchor bolt, 9... Hole, 10... Washer, 12... Nut.

Claims (1)

[Claims] 1. Place a quick-setting adhesive and a slow-expanding adhesive in containers, insert the quick-setting adhesive on the front side and the slow-expanding adhesive on the rear side into the hole, and insert the anchor bolt. 1. A method for burying anchor bolts, the method comprising: fixing the tip of the anchor bolt with a fast-setting adhesive, then tightening the anchor bolt, and filling the gap with a delayed-expansion adhesive.