JPH051419A - Slime treatment method for expanded bottom drilled hole and device therefor - Google Patents

Abstract

PURPOSE:To enable slime to be easily treated by providing an agitation vane at the end of a discharge tube, a submersible pump at the intermediate section of the tube and further a swivel at the upper part of the tube. CONSTITUTION:A suction port 12 is provided at the end of a discharge tube 1, and agitation vanes 2 are fitted at both sides of the port 12. Also, a submersible pump 5 is installed at the intermediate section of the tube 1, and a swivel 6 is fitted to the upper part of the tube 1 for connection to a rotary kelly-bar 7, a hydraulic tube 8, an electric conduit 9 and a discharge port 10. Then, the vanes 2 as folded are inserted in a vertical hole A having an expanded bottom drilled with a drilling mud construction method. Then, the vanes 2 are expanded and continuously rotated at the expanded bottom. Sedimentary slime is agitated and mixed with drilling mud via the rotation of the vanes 2, pumped up through the suction port 12 and tube 1 via the operation of the pump 5, and discharged to the ground from the discharge port 10. Thereafter, the tube 1 is lifted up, and a reinforcement cage is inserted in the hole A and filled with concrete, thereby forming a pile. According to this construction, slime can be easily treated by rotating the vanes 2 after expansion or contraction to suit the size of the expanded bottom section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slime processing method for expanding holes and a slime processing apparatus therefor, which is carried out when constructing cast-in-place concrete piles.

[0002]

When constructing a cast-in-place concrete pile, a vertical hole is first excavated. However, when excavating using a mud method, sediment slime is generated at the excavated bottom,
It is well known that when concrete is placed on it, the yield strength is impaired, and many proposals have been made regarding the treatment of the precipitated slime.

By the way, when the cast-in-place concrete pile is constructed, the bottom is often expanded, and there is a demand for the development of a method and an apparatus which can pass through the settling slime treatment of the bottom-drilling hole, and the present invention meets the demand.

[0004]

The slime treatment method for expanding bottom drilling according to the present invention uses a drain pipe having a stirring blade which can be horizontally expanded and contracted at the tip and which can be bent upward. Inserted into the bottom expanding hole in the folded state, deploying the stirring blade at the bottom expanding part, and by continuously rotating,
The precipitated slime is stirred and mixed in mud water, and is pumped through a drain pipe and discharged. And the slime treatment device that implements the above method is equipped with a stirring blade that can be folded and expanded by a hydraulic jack at the tip of the drain pipe, an underwater pump is installed in the middle of the drain pipe, and a swivel is installed above the drain pipe. It is provided and connected to a rotating kelly bar, hydraulics, electricity and a drain.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an apparatus used in the present invention and its use condition. First of all, the device will be described. A suction port is provided at the tip of the drainage pipe 1, and stirring blades 2 are provided on both sides of the suction port. The stirring blade 2 can be manually expanded and contracted in the horizontal direction, can be adjusted to the expanded diameter on the ground before being installed in the drilled hole, and can be bent upward by the link 3 and the hydraulic jack 4.

A submersible pump 5 is installed in the middle of the drain pipe 1, and a swivel 6 is provided above the drain pipe 1.
It is connected to the rotary kelly bar 7, hydraulic pipe 8, electric pipe 9, and drainage port 10. The hydraulic pipe 8 communicates with the hydraulic jack 4 and the electric pipe 9 communicates with the submersible pump 5. Further, the swivel 6 is provided with an air pipe 11 so that air can be ejected in the middle of the drain pipe 1 to use the drainage as an air lift.

At the time of use, the stirring blade 2 is inserted in a folded state into a vertical hole A which is excavated and expanded by a mud construction method,
At the bottom expanding part, the stirring blade 2 is developed and continuously rotated to stir and mix the precipitated slime into the muddy water, and the water is pumped through the water inlet 12 and the drain pipe 1 by the submersible pump 5, and discharged to the ground from the drain port 10. Then, the drainage pipe 1 is pulled up, a reinforced basket or the like is used to insert a rebar cage into the vertical hole A, and concrete is poured to form a pile.

[0008]

EFFECTS OF THE INVENTION The present invention has the above-described structure, and at the tip of the drainage pipe, the stirring blade is expanded and contracted according to the size of the bottom expanding portion to rotate, so that the precipitated slime on the entire surface of the bottom expanding can be surely stirred in the muddy water. It can be mixed and discharged to the ground. Further, by providing a swivel on the upper part of the drain pipe in the device, it is possible to operate while continuously rotating the submersible pump provided in the middle of the drain pipe and the hydraulic jack of the drain pipe.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an outline of an implementation state of the present invention.

[Explanation of symbols]

A ... Vertical hole 1 ... Discharge pipe, 2 ... Stirring blade, 3 ... Hydraulic jack, 4 ... Submersible pump, 5 ... Swivel, 6 ... Kelly bar, 7 ... Hydraulic pipe, 8
... Electric piping, 9 ... Drainage port, 10 ... Air pipe, 11 ... Water inlet.

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[Procedure amendment]

[Submission date] July 2, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of Codes] A ... Vertical hole 1 ... Drain pipe, 2 ... Stirring blade, 3 ... Link, 4 ... Hydraulic jack, 5 ... Submersible pump, 6 ... Swivel, 7 ... Kelly bar,
8 ... Hydraulic pipe, 9 ... Electric pipe, 10 ... Drain port, 11 ... Air pipe, 12 ... Water inlet.

Claims (2)

[Claims] 1. A tip can be horizontally expanded and contracted, and
Using a drainage pipe with a stirring blade that can be bent upward, insert the stirring blade into the bottom expanding hole with the stirring blade folded, expand the stirring blade at the bottom expanding part, and rotate it continuously to precipitate sediment slime. The method for slime treatment of bottom-drilling holes, which comprises stirring and mixing water in mud water and pumping the water through a drainage pipe to discharge. 2. A drainage pipe is provided with a stirring blade that can be folded and expanded by a hydraulic jack at the tip of the drainage pipe, a submersible pump is provided in the middle of the drainage pipe, and a swivel is provided above the drainage pipe to provide a rotary kelly bar, hydraulic pressure, A slime treatment device for bottom drilling, which is connected to electricity and drainage ports.