JPH0361833B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a drilling device used for drilling a hole in a place where a foundation pile such as a pile is to be buried.

<Prior art> As a technology similar to the present invention, for example,
Techniques such as those shown in Japanese Patent Publication No. 55-45960, Japanese Patent Publication No. 57-27255, and Japanese Utility Model Application Publication No. 118092/1982 are known.

<Problems to be solved by the invention> With the conventional technology, it is not smooth to excavate the hole for burying the pile, and it is difficult to dispose of the remaining soil because a lot of soil is dumped on the ground. However, there were drawbacks such as the difficulty of constructing an enlarged head to obtain strong support for the pile.

The present invention attempts to solve these conventional problems.

<Means for Solving the Problems> First, the masterpiece device according to the present invention will be explained with reference to the drawings. In FIGS. 5 to 8, 1 is the excavation device of the present application, and earth auger rotating device 2 A tip excavating blade 4 is attached to the lower end of the hollow shaft 3 which is rotated by the hollow shaft 3, and a screw blade 5 having a height of approximately 3 m from the bottom to the top of the hollow shaft 3, and four concave plates. A polygonal cylindrical crimping blade 6 with a height of 3 m, which is arranged back to back and adjacent to each other, and a screw blade 7 similar to the above described with a height of about 3 m are kept at a predetermined distance on the outer peripheral surface. Stirring cylinders 9 each having four vertical bars 8 fixedly attached thereto are sequentially attached to the hollow shaft 3 at predetermined intervals. Further, the hollow shaft 3 is constructed so that fresh water, cement milk 10, etc. can be extracted from the lower end thereof.

In the excavating device 1, the excavating blade 4 is designed such that when the excavating blade 4 is rotated in reverse as shown in FIG. It is configured. The screw blade 5 has the function of ensuring the propulsion speed of excavation as well as the direction of the excavation, and furthermore, the polygonal cylindrical crimp blade 6 constituted by adjacent concave plates is connected to the excavation blade. The excavated soil excavated by the screw blade 4 and the screw blade 5 and mixed with fresh water is pressed against the inner circumferential wall of the hole with little resistance and acts to suppress the soil from being discharged to the ground. In addition to serving as a steady rest, it also has the function of stirring the remaining excavated soil and fresh water and turning them into soil.

Next, an embodiment of a method for embedding piles using the apparatus according to the present invention will be described in detail. In FIGS. 1 to 4, the excavation blade 4 and A hole 12 is drilled at the location where the pile is to be embedded using the screw blade 5, and the crimping blade 6
After excavating the hole 12 of a predetermined depth by stirring the mud with the stirring cylinder 9 and compacting it onto the inner peripheral wall surface of the hole 12, the excavation blade is The claw 11 is made to protrude from the outer circumference of the hole 12, and the bottom of the hole 12 is excavated to a diameter larger than that of the upper part. After the drilling is completed, the drilling device 1 is rotated in the forward direction to insert the claw 11 into the drilling blade 4. Then, cement milk 10 is injected into the bottom of the hole 12 from the tip of the hollow shaft 3, and then this excavation device 1 is pulled out from the hole 12, and more particularly, about 70 mm is poured into the center as shown in FIG.
A vertical hole 13 with a diameter of The method of embedding a pile using the apparatus of the present invention can be completed by embedding the enlarged head 15 in the cement milk 10 at the bottom of the hole 12 and fixing them integrally to each other. I can do it.

<Example> As shown in FIG. 9, in the excavation equipment according to the present invention, when the hollow shafts 3 are sequentially connected and lengthened,
Correspondingly, crimping blades 6 and stirring cylinders 9 are added and attached alternately to make the excavation device 1 extremely long as a whole.
It is possible to configure

Furthermore, the claw 11 of the excavating blade 4 used in the device of the present invention
The loading and unloading can also be implemented using a spring mechanism or a hydraulic device.

<Effects of the Invention> As described above, the excavating device according to the present invention is configured such that the excavating blade, the screw blade, the crimping blade, and the stirring cylinder are respectively attached at predetermined intervals from the lower end of the hollow shaft. It is possible to excavate a hole extremely smoothly in the ground of any soil type, and it is possible to efficiently compact the mud produced by the excavation on the inner circumferential wall of the hole, thereby extremely minimizing the amount of soil discharged to the ground. By rotating in the opposite direction, the bottom of the hole can be excavated to a large diameter, and cement milk can be poured into the bottom.

Furthermore, since the method of embedding piles using the excavation equipment according to the present invention is a method of burying the piles in a hole that has been excavated in advance, it is possible to bury the piles efficiently with less vibration and noise. The enlarged head attached to the lower end of the pile can be buried in the cement milk poured in advance at the bottom of the large diameter hole to fix them to each other, so the cross-sectional area of the tip of the pile ( AP) and has the characteristics of being able to obtain a strong supporting force for the pile.

[Brief explanation of drawings]

Figures 1 to 4 are explanatory diagrams showing a method for embedding piles using the device of the present invention, Figures 5 to 8 are explanatory diagrams of an excavation rig, and Figure 9 is an explanation of another example of an excavation rig. 10 are explanatory diagrams of the head of the pile. 1 is a drilling device, 3 is a hollow shaft, 5 is a screw blade, 6 is a crimping blade, 9 is a stirring cylinder, 10 is cement milk, 12 is a hole, 14 is a pile, and 15 is an expanding head.

Claims (1)

[Claims] 1 An excavating blade whose blade can protrude from the tip of the outer periphery when rotated in the opposite direction, a screw blade, a crimping blade for crimping made up of several concave plates adjacent to each other in a polygonal cylindrical shape, and several vertical bars on the outer periphery of the screw blade. An excavation device characterized in that stirring cylinders each having a predetermined interval therebetween are sequentially attached and fixed from the lower end of a rotary hollow shaft upwards while maintaining a predetermined interval therebetween.