KR930003591Y1 - Working apparatus of foundation pile - Google Patents

Abstract

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Description

Construction device of foundation gang

1 is a partial cutaway front view of the construction apparatus of the first embodiment;

2 is an explanatory diagram of a state of drilling by the apparatus.

3 is an explanatory diagram of the construction completion state of the foundation shaft.

4 is a partial cutaway front view of the construction apparatus of the second embodiment;

5 is a partially cutaway front view of the oga head of the third embodiment.

* Explanation of symbols for main parts of the drawings

1: Oga head 2: slope

3: excavation blade 4: screw blade

5: Absorption 6: Casing

7: hollow part 10: spiral protrusion part

13: weight addition 17: hole

The present invention relates to a construction apparatus of a foundation shaft consisting of an auger head and a casing for drilling a ground.

As a conventional method for constructing a foundation shaft on a predetermined ground, there is a misprocessing method in which ground is drilled by an auger and a base shaft is inserted into and fixed in the hole, a so-called noiseless vibration method.

However, in the above-described method, the hole hole formed by the excavation of the azuga is easily collapsed in the hole circumference wall at the time of the hole drilling or the insertion of the gang, and the subsequent work is often difficult.

In addition, because the hole wall is weak, water immersion and water are likely to occur, and therefore, there is a problem in that the gang cannot be constructed securely.

Therefore, in order to solve such a problem, a method of preventing the collapse of the hole circumferential wall by injecting a bent night liquid into the hole is also employed.

However, the bent night solution was expensive and therefore uneconomical, and it was extremely difficult to reliably protect the lower part of the hole wall.

Thus, in order to solve the above problems, conventionally, an excavation blade is disposed at the tip portion, and the outer circumference has an orga head composed of a conical inclined surface, and a casing protruded on the upper portion of the oga head. The wing blade piece is installed in the outer blade, and the outer periphery of the skew blade piece has a thick, high-thick roll of the same diameter, and the outer circumferential surface of the casing is provided with a screw-shaped protrusion of approximately the same diameter as the outer diameter of the screw blade piece. There was a construction device for a foundation shaft.

The device can squeeze the hole circumferential wall firmly by the rolling of the orga head at the time of drilling without special work, and at the same time can reduce the hole circumferential wall and frictional resistance by the spiral protrusion of the casing.

However, according to the conventional construction apparatus as described above, even if the frictional resistance between the casing and the hole circumferential wall is small at the time of drilling, when the hole circumference is firmly pressed by the rolling, it is strong between the roll and the circumferential wall at the time of drilling. Frictional resistance is created.

Therefore, this becomes a resistance in the drilling direction, so the drilling force is insufficient in a small construction machine.

In addition, when encountering clay or gravel soils during construction, the resistance is increased and excavation is impossible, so the construction machine must be replaced from the small machine to the large machine. On the site where large scale machines cannot be introduced, other excavation methods must be changed.

The present invention was devised to solve the problems as described above, and it is possible to press the hole circumferential wall firmly by the rolling in the time of drilling, as well as to make sure the foundation of the foundation shaft can be reliably and smoothly drilled. For the purpose of providing it.

In order to achieve the object as described above, the factory factory of the inventive base pit has an excavation blade disposed at the tip and the outer head is composed of an almost conical inclined surface, and the casing struck on the upper part of the organ head. It is provided with a screw blade on the inclined surface of the oga head and at the same time the outer diameter of the screw blade is installed on the outside of the same diameter and thick, thick pyeonyum (壓 土 緣), the outer diameter of the screw blade piece on the outer peripheral surface of the casing In the construction device for the foundation shaft by installing a spiral protrusion having a diameter of almost the same, characterized in that the weight portion of the hollow inside of the casing filling the water adjustable.

EXAMPLE

1 shows a first embodiment of the present invention, the oga head 1 has an outer circumferential surface composed of a substantially conical inclined surface 2, and a plurality of excavation blades 3 having an inclination angle θ are provided as one body at the tip end thereof. have.

On the inclined surface 2, a screw blade piece 4 is integrally installed, and on the outer circumferential portion of the screw blade piece 4, a thick, thick rolled iron roll 5 is formed in one body.

There are also four screw blades in overall thick flesh.

Therefore, the piezoelectric strip 5 is formed such that its outer diameter a is almost the same diameter in the up and down directions.

The casing 6 is then addressed to the upper portion of the head 1 so that the casing 6 can be detached by a bolt or the like.

The casing 6 is cylindrical and the hollow part 7 is formed inside.

The upper and lower ends of the casing 6 are closed by a removable upper lid 8 and a lower lid 9.

The outer circumferential surface of the casing 6 is provided with a spiral protrusion 10 having a diameter b almost equal to the outer diameter a of the screw blade 4 (ie, the rolling mill 5).

Injection pipes 11, such as mortar, are inserted in the center circumference of the organo head 1 and the casing 6, and the tip of the injection pipe 11 is fitted in the injection hole 12 at the tip of the organ head.

The casing 6 of this embodiment is composed of a double-structured composite gang consisting of a high-strength PC gang (PHC gang) 6a having a compressive strength of about 800 kg / ㎠ and a steel pipe 6b laminated close to the outer periphery, helical protrusion 10 Is a spiral wound of steel such as PC steel rod on the outer periphery of steel pipe 6b, and then fixed by welding.

The high-strength PC gang 6a has a thickness of about 6 mm to 60 mm, the steel pipe 6b has a thickness of about 15 mm to 20 mm, and the helical protrusion 10 has a length of 30 mm to 50 mm.

In addition, the hollow portion 7 of the casing 6 is configured to load the weight-added material 13 so that it can be adjusted.

The weight additives 13 are concrete lumps or ingots that can be easily obtained on site, including those formed in a predetermined form so that heavy materials such as concrete or iron can be put into and taken out of the hollow portion 7.

Therefore, a predetermined amount of weight additive 13 is put into or taken out of the hollow portion 7 so that a predetermined load can be applied to the casing 6 as necessary.

According to the device of the present invention configured as described above, as shown in FIG. 2, the upper end of the casing 6 is connected to the driving source 15 of the construction machine, and the casing 6 and the orga head 1 are rotated integrally, and the ground is excavated by the excavation blade 3. First, the Oga head 1 is drilled into the ground together with the casing 6 while drilling a hole.

As excavation force, excavated soil 16 of the tip part is forced to be widely spread and pressed around by the inclined surface 2 of the orga head 1, and at the same time, the excavated soil 16 is pressed by the hole circumferential wall 18 of the hole 17 by the pressure rolling 5 of the screw blade 4 The hole wall 18 is tightly pressed.

Since the outer diameter a is about the same size up and down, the rolled apex 5 is squeezed firmly as the hole circumferential wall 18 is firmly pressed into the hole 17 of the inner diameter a.

In addition, it is possible to arbitrarily set the compressive strength to the hole wall 18 by the relationship between the inclination angle θ of the excavation blade 3 and the thickness of the flesh of the rolling mill 5.

Here, when the compaction is carried out as described above, a large frictional resistance is generated between the rolling mill 5 and the hole circumferential wall 18, and this becomes a resistance force in the drilling direction of the organ head 1 and the casing 6, thereby reducing the drilling speed.

However, the casing 6 is loaded with the weight additive 13 in the hollow portion 7, which is the load in the direction in which the organ head 1 and the casing 6 extend.

Therefore, even if a large frictional resistance is generated between the rolling mill 5 and the hole circumferential wall 18, it is possible to overcome this and to roll the orga head 1 and the casing 6 very reliably and smoothly.

In addition, since the frictional resistance between the rolling mill 5 and the hole circumferential wall 18 is different depending on the soil, the load by the weight-added material 13 is also adjusted by the soil.

For example, if the length L of the casing 6 is 13 mm as in the present embodiment, the weight is 200 kg / cm in cohesive soil (solid clay) of about 20 N values (values indicating the strength and weakness of the soil), and about 40 kg / cm N values. The layered amount of the weight-added material 13 is 250 kg / mm in the tomyeon layer, 300 kg / mm in the sand gravel layer having an N value of about 45, and 400 kg / mm in the point velocity of the N value 50 degree or in the jade stone layer. Adjust the value.

Therefore, even if it touches a solid soil layer, only the casing 6 with the increased loading of heavy additives 13 or the increased loading of heavy additives 13 in the casing 6 without changing the construction machine from the small machine to the large machine or changing to a separate excavation method. We can continue construction by exchange.

However, a strong frictional resistance is generated between the hole circumferential wall 18 and the outer peripheral surface of the casing 6, which are strongly pressed at the same time as the hole, and it is difficult to insert the casing 6.

However, on the outer circumferential surface of the casing 6, a spiral protrusion 10 having a diameter b almost equal to the outer diameter a of the screw blade 4 is installed, and the spiral protrusion 10 contacts the hole circumferential wall 18 and rotates in the ground at the same time as the hole. Since it follows after 1, the frictional resistance between the hole peripheral wall 18 is greatly reduced, and the casing 6 is inserted very smoothly.

In addition, the casing 6 of the present embodiment is composed of a double structure composed of a high-strength PC gang 6a and a steel pipe 6b laminated close to the surroundings and a complex gang, so not only the strength is very large, but also the heavy weight of the casing 6 itself due to the weight of the concrete and the steel pipe. It becomes.

In addition, the casing 6 is thick enough and the protruding length of the spiral protrusion 10 is large, so it is very strong against wear and can withstand long-term use.

In addition, if the spiral protrusion 10 is worn, it is good to remove it and fix it with a new one. In this manner, when the excavation reaches a certain length, the oga head 1 and the casing 6 are removed from the excavation hole 17 while spraying mortar and concrete into the excavation hole 17 from the injection hole 12 at the tip of the orga head 1.

Thus, as shown in FIG. 3, a predetermined length of mortar pillar 19 is formed in the hole 17, and the base shaft 20, the iron rod, and the core material made by conventional methods before the mortar is cured. By inserting the soil in the ground around the hole, it is easy to construct a solid foundation shaft that is integrally bound with the mortar.

Depending on the shape or work process, it is possible to drive the base gang 20 without using mortar, or to leave the casing 6 in the ground and to remove only one part of the oga head to the ground.

4 shows the second embodiment, wherein the outer circumferential surface of the oga head 1 is formed into a conical shape in which the inclined surface 22b is different from the inclined surface 22a and the inclined angle continuous to the upper portion thereof.

Then, the casing 6 having the hollow portion 7 on the upper portion of the oga head 1 was opened and the weight additive 13 was filled in the hollow portion 7.

In the second embodiment, the casing 6 is formed of a steel pipe, and the spiral protrusion 10 is integrally formed on the outer circumference of the steel pipe, so that the flesh is thickened almost the same as the push-to-roll 5 of the screw blade 4, as in the first embodiment. It is good also as a spiral protrusion. Next, FIG. 5 shows the third embodiment, which is not the rolled roll 5 in which the entire screw blade piece 4 is thick like the first and second embodiments described above, and the outer peripheral portion of the screw blade piece 4 is bent upward to almost cross section. It is made of “p” 55 by forming “L” shape.

In this case, the excavated soil can be raised smoothly and reliably upward by the upper surface element 4a of the screw blade 4.

Although the embodiment of the present invention will be described above, the present invention is not limited to the embodiment and can be effectively changed in various ways based on the technical idea of the present invention.

As described above, according to the present invention, even when a large frictional resistance is generated between the rolling pin and the hole circumferential wall when the hole circumference is tightly pressed by the rolling of the screw blade, the weight can be adjusted in the hollow part of the casing. The weight-added material can be applied to the organ head and the casing in the direction of excavation in correspondence with the soil, so that the excavation can be smoothly and surely performed. Therefore, even when encountering a strong soil layer during the construction work, it is necessary to change the construction machine from a small machine to a large machine, or to adjust the weight of the casing or replace it with a calibrated casing without changing the excavation method. As construction can be continued, it is very advantageous both economically and during the construction period.

Claims (2)

The excavation blade is provided at the tip and has an auger head composed of an inclined conical surface and a casing struck on the upper part of the oscillating head. The foundation of the foundation shaft is provided by installing a spirally stiffened portion of the upper and lower parts of the screw blade piece with the same diameter and thick flesh, and installing a spiral protrusion having a diameter substantially the same as the outer diameter of the screw blade piece. An apparatus for constructing a foundation shaft, characterized in that a weight-adjustable weight is filled in a hollow portion of the casing. The method of claim 1, wherein the casing is filled with a high-strength prestressed concreate material for filling the weight-added material and a composite of a double structure consisting of steel pipes that are densely stacked on the outer circumference, and the steel pipe is wound spirally around the outer circumference. Construction device of the foundation shaft, characterized in that the stationary.