JPS5936610Y2 - Hole forming device for temporary concrete crushing - Google Patents

Description

[Detailed description of the invention] In the present invention, a camp 1 is removably fitted to the lower end, a horizontal pin 4 is inserted into the upper end of the pipe 2 which can accommodate the sand bag 3 inside, and both ends of the horizontal pin 4 are inserted into the upper end of the pipe 2. section and the above camp 1 to the wire rod 5
This invention relates to a hole forming device for temporary concrete crushing that is configured to be connected by.

The camp 1 has an inverted conical shape and has a pipe fitting part 1 on its top surface.
′.

The pipe 2 is a connecting pipe 2 for length adjustment as shown in Fig. 1.
/, 2II may be connected to form a long one, or the fourth
As shown in the figure, a short one may be used in which the connecting pipes 2' and 2'' are omitted.

The pipe 2 is made of metal or synthetic resin and has a thin wall.

Sand bag 3 is a long and narrow cylindrical plastic bag filled with fine sand.
The plastic bag is closed by tying the top end with a string or the like.

The diameter of the sand bag 3 is slightly smaller than the diameter of the pipe 2,
When the sand bag 3 is housed inside the pipe 2, a slight gap is created between the sand bag 3 and the surface of the pipe 2 to prevent damage to the plastic bag.

The horizontal pin 4 is inserted into a pin hole drilled in the upper end of the pipe 2 with both ends protruding.

The wire rod 5 is inserted into a through hole 6 made horizontally in the camp using a thick wire, and both ends of the wire rod 50 are wound around both ends of the pin 40 and connected, so that the camp 1 will not fall off from the pipe 2. Do it like this.

In the figure, 7 indicates a clay pankin, 8 a vibrator 1s whose lower part is inserted through the pin 4, io a pin hole for length adjustment, and 11.12 a connecting pin.

Therefore, when constructing water and sewage systems, there is a reaction wall (formed when a pipe is forced in laterally with a jack) that is formed in a vertical shaft (pinto) when building water and sewage systems.

), etc. To form holes for crushing in temporary concrete, follow the steps below.

That is, as shown in FIG. 5, after pouring the ready-mixed concrete 13 for the bed, the pipe 2 containing the above-mentioned sand bags 3 is inserted from the top of the ready-mixed concrete 13 by operating the vibrator 8 and measuring the predetermined press-in depth with a level. Press-fit into the homogeneous concrete 13 while doing so.

At this time, the press-fitting is stopped with the upper part of the pipe 2 and the sand bag 3 inside the pipe 2 slightly protruding from the upper surface of the poured concrete IJ-113.

After the pipe 2 is press-fitted to a predetermined depth, the pin 4 is
Remove the wire rod 5 wound around the pin 4 from the pin 4.

Next, before the poured concrete 13 has hardened, as shown in FIG. 7, while operating the biflator 8, the pipe 2
When the chisel is pulled out, the poured concrete 13 before hardening flows toward the sand bag 3 as shown by the arrow in the figure, and a sand column is formed by the sand bag 3 in the poured concrete 13 (No. 8 figure).

Then, before the fresh concrete 13 hardens, a predetermined number of pipes 2 are press-fitted and pulled out in the same manner as described above.
As shown in the figure, a plurality of sand pillars are formed in fresh concrete 13.

Thereafter, the binding part of the upper part of the sand bag 3 that slightly protrudes from the upper surface of the hardened concrete is untied, and the fine sand in the sand bag 3 is sucked and discharged by a vacuum suction machine 14 to form a long hole 15 for crushing.

If the pipe 2 of the hole forming device is short as shown in FIG.
Press-fitting can be performed by providing the following.

Then, the 11th hole among the plurality of holes 15 formed in the above-described manner.
As shown in the figure, when a static crushing agent (trade name: Plystar, manufactured by Onoda Cement Co., Ltd.) is filled into the holes 15 indicated by parallel diagonal lines, the hardened concrete 13 will expand to the expansion pressure due to the heat of reaction. As a result, cracks occur as shown in FIGS. 12 and 13, and the product is dismantled by conventional methods.

A gas flame may be used instead of the static crushing agent.

Conventionally, when forming crushing holes in temporary concrete such as bed pile caps or reaction walls, mechanical drilling was performed in the solidified temporary concrete, that is, using a compressor or electric motor as the power source, and using a carbide pinto at a speed of 1000 per minute. Since drilling was performed by applying multiple blows and at the same time rotating hundreds of times, there were drawbacks such as noise, dust generation, and high drilling costs.

Since the present invention is constructed as described above, the crushing holes 15 can be formed in advance when constructing temporary concrete, so there is no risk of noise or dust being generated due to mechanical drilling as in the past, and the problem of pollution can be solved. According to the device of the present invention, the time required to form holes for crushing can be shortened compared to mechanical drilling, and there are practical benefits in that the cost for forming holes can be reduced.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing the temporary concrete crushing hole forming device of the present invention, Figs. 2 and 3 are longitudinal sectional views of the connecting pipe, respectively, and Fig. 4 is a longitudinal sectional view showing the other side of the device. Figure 5 is a diagram of the press-in state of the device shown in Figure 1, Figure 6 is an enlarged longitudinal sectional view of Figure 5, Figure 7 is a longitudinal sectional view of the pipe being pulled out, and Figure 8 is the bed pile head after the pipe is pulled out. Longitudinal cross-sectional view of
Figure 9 is a sand suction state diagram, Figure 10 is a crushing agent filling diagram,
Figure 1 is a plan view of Figure 10, Figure 12 is a diagram of the state of crack occurrence,
FIG. 13 is a plan view of FIG. 12. 1... Camp, 2... Pipe, 3.
...Sand bag, 4...Horizontal pin, 5...
··wire.

Claims (1)

[Scope of utility model registration request] A hole forming device for temporary concrete crushing, in which a camp 1 is removably fitted to the lower end, and the upper end of a pipe 2 capable of accommodating a sand bag 3 inside is connected to the camp 1 by a wire 5.