JPH0913369A - Concrete filling method and filling confirmation and sampling device for cast-in-place concrete pile - Google Patents

Abstract

(57) [Summary] [Purpose] Cast-in-place concrete pile that enables reliable filling without excavation of concrete or inclusion of slime in the drilling hole, confirms the presence or absence of concrete during the process and at the completion of filling, and confirms the quality. Concrete filling method, filling confirmation and sampling device. [Structure] The vibrator 7, the scale 9, the concrete filling confirmation and the sampling device 13 are fixed to the anchorage of the steel pipe inserted into the excavation hole 1 in advance, and the concrete is placed while operating the vibrator, and the inspection is performed. Samples of shaku and concrete will be taken during the concrete pouring process and at the time of completion of filling, and solid and solid concrete will be poured surely up to the top end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete filling method for filling concrete into a drill hole using a steel pipe, and concrete filling confirmation and sampling for confirming the presence and quality of concrete at the time of filling. Regarding the equipment, in particular, concrete filling method and filling confirmation and sampling equipment for cast-in-place concrete piles, which ensures that high-quality cast-in-place concrete piles are reliably placed up to a specified top end without concrete separation or slime inclusion Regarding

[0002]

2. Description of the Related Art As a method for filling a cast-in-place concrete pile with a steel pipe, the method shown in FIG. In the drill hole 1, a reinforcing bar 2 is preliminarily arranged in a central portion along a vertical method. The steel pipe 3 is arranged so as to cover the rebar 2, and a gap 4 is formed between the steel pipe 3 and the excavation hole 1. Steel pipe 3
Is supported by a rope 6 from the ground 5 side. The vibrator 7 is later placed in the clearance 4 from the ground, is suspended from the ground 5 side, and is controlled to operate from the ground 5 side. Also, the pouring position of the concrete 8 is the scale 9
The measurement scale 9 is also hung from the ground 5 side. The concrete 8 is supplied by a tray tube 10.

First, the tray tube 10 to the concrete 8
Is supplied into the steel pipe 3 and is vibrated around the steel pipe 3 by the vibrator 7. As described above, the concrete 8 is filled in the steel pipe 3 and the concrete 8 spilled from the upper end enters the gap 4. While the steel pipe 3 is being pulled up to the top end portion 11 (FIG. 18), the concrete 8 as described above is repeatedly placed. FIG. 16 shows a state in which the upper end of the concrete 8 filled in the steel pipe 3 ends at the top end portion 11, and the measuring scale 9 confirms this. In this case, concrete 8 in steel pipe 3
And the level of concrete 8 in the gap 4 do not match. Therefore, when the vibrator 7 is activated, the operation shown in FIG.
As shown in FIG. 3, the steel pipe 3 vibrates, the concrete 8 in the steel pipe 3 descends from the top end portion 11, and the level of the concrete 8 in the gap 4 rises. Therefore, next, the concrete 7 is supplied from the tray tube 10 into the steel pipe 3, and the vibrator 7 is supplied.
As shown in FIG. 18, the level of the steel pipe 3 and the level of the concrete 8 in the gap 4 are made to coincide with each other, and the top end 1 is operated.
Matches 1. Steel pipe 3 is removed, top end 11 and ground 5
Filling of cast-in-place concrete is completed by pouring extra concrete in the space between and.

Also in the prior art, a concrete sampling tool has been used for inspecting the quality of the concrete 8 that has been placed during or after the step of placing the concrete 8. As one of the known techniques, Japanese Patent Laid-Open No. 5-19553
There is a technique disclosed in Japanese Patent Laid-Open No. A slender cylinder body is inserted into this from the ground side, the sampling port formed at the tip of the cylinder body is opened from the ground side, concrete is poured into the tip part and pulled up to the ground side for concrete quality inspection. .

[0005]

Although the concrete 8 can be filled in the excavation hole 1 by the conventional concrete filling method shown in FIG. 15, there are the following problems. First, both the measuring scale 9 and the vibrator 7 cannot be correctly positioned at a desired position because they are hung down and positioned after being filled with concrete from the ground 5 side. Therefore, the top end portion 11 is inaccurately identified, or the engagement position between the vibrator 7 and the steel pipe 3 is inaccurate, and the vibration of the steel pipe 3 by the vibrator 7 is not sufficiently performed. Therefore, there is a problem that the homogenization of concrete is insufficient. Further, since the steel pipe 3 is pulled up by the rope 6, an unreasonable force acts on the rope 6 in some cases, and there is a problem that the steel pipe 3 is cut. Further, the confirmation of the level of the concrete 8 in the steel pipe 3 and the level of the concrete 8 in the gap 4 is visually confirmed from the ground 5 and is inaccurate. Further, the inspection of the concrete 8 by the conventional concrete sampling tool is performed after the filling of the concrete 8 is completed, and there is a problem that it is not possible to confirm the quality during the filling and the presence or absence of concrete. Furthermore,
The conventional concrete sampling tool is slightly complicated in structure and has a problem of poor operability.

The present invention solves the above problems and ensures that the concrete is filled so that the levels of the concrete inside the steel pipe and in the gap are the same.
An object of the present invention is to provide a concrete filling method for a cast-in-place concrete pile and a filling confirmation and sampling device that enable confirmation of the presence or absence of concrete between processes and the quality of the concrete to be collected easily and reliably. And

[0007]

In order to achieve the above object, the present invention covers a steel pipe around a rebar in an excavation hole, and uses a tray-mi tube in the steel pipe and in the gap between the steel pipe and the excavation hole. A concrete filling method in which concrete is filled up to a predetermined top end while measuring it using a measuring scale, and vibration is given with a vibrator, and the concrete is sampled to check its quality and then cast in place to form concrete piles. There, the vibrator which is lifted and controlled to operate from the ground side, the measuring scale and the concrete sampling tool are previously fixed to a fixing muscle fixed to the upper end side of the steel pipe with a vinyl tape, and the vibrator is fixed. While operating, place concrete in the steel pipe, check the level position of the placed concrete with the measuring scale, and And it is characterized in concrete filling method of cast-in-place steel concrete piles to perform concrete filled while checking test the presence and quality of concrete by chromatography preparative sample collecting tool. In addition, the steel pipe is covered around the reinforcing bar in the drill hole, and the presence or absence of concrete in the course of the process of filling the inside of the steel pipe and the gap between the steel pipe and the drill hole up to a predetermined top end with the traymi pipe and its quality. A filling confirmation and sampling device used to check the, wherein the device is fixed to the upper end of the steel pipe, the support being fixed to a fixing bar, and fixed to the lower end of the support. A concrete sampling tool,
A concrete filling confirmation and sampling device for a cast-in-place concrete pile made of cast-in-place concrete piles, which comprises an opening / closing means provided on the sampling tool side so as to connect the sampling section and the concrete side that is placed. More specifically, the concrete sampling tool comprises a closed box provided with a concrete entrance and exit, and the opening and closing means comprises a plug that is detachably attached to the concrete entrance and exit,
The concrete sample collecting tool comprises a closed case having large and small concrete entrances and outlets, and the opening and closing means comprises large and small plugs respectively inserted into the large and small concrete entrances and exits. The sampling tool comprises a concrete receiving tool having an opening at the lower end and a vacuum means communicating with the receiving tool via a flexible tube, and the opening / closing means is provided between the receiving tool and the vacuum means. It is characterized by comprising an open / close valve.

[0008]

When the steel pipe is inserted into the excavation hole, the vibrator, the scale and the concrete sampling tool, which are previously fixed to the anchoring muscle by the vinyl tape, also move therein. Further, since the steel pipe is lifted and lowered, it also serves as a vibrator lifting device, so that there is no fear of cutting or the like. When the steel pipe is set at an appropriate position and the vibrator fixed to the steel pipe is vibrated while the concrete is filled in the steel pipe with the tray-mi pipe, the concrete is densely packed in the steel pipe. The concrete reaching the upper end of the steel pipe falls from the upper end to the gap side between the steel pipe and the excavation hole and is filled in the gap.
During the process, the concrete in the steel pipe temporarily goes down to the gap side by the vibrator. Therefore, a space is formed on the upper side of the steel pipe. Even if the opening / closing means of the concrete sampling tool is opened in this state, concrete does not enter the concrete sampling tool. Therefore, it can be seen that the steel pipe 3 has a space. By positioning the upper end of the steel pipe to the top end while repeating the above work, concrete is filled into the steel pipe and the gap to the level of the top end. By operating the concrete sampling tool in that state, it is possible to know the quality of the concrete when the filling is completed. Further, the concrete sampling tool is securely held on the side of the steel pipe, and the concrete is easily sampled by the opening / closing operation of the opening / closing means, so that the sampling work can be simplified. Further, the concrete filling confirmation and sampling device is a simple one comprising a concrete sampling tool and its opening / closing means, and can be implemented at a low cost.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an axial sectional view showing the overall structure of the present embodiment, FIG. 2 is a top view of FIG. 1, and FIGS. 3 to 7 are schematic axial sectional views for explaining the concrete filling method of the present embodiment. 8 is a sectional view of an embodiment of the concrete filling confirmation and sampling device, FIG. 9 is a top view of FIG. 8, FIG. 10 is a sectional view of another embodiment of the concrete filling confirmation and sampling device, and FIG. 11 is FIG. 1 is a top view showing the outline of the arrangement in the steel pipe of the concrete filling confirmation and sampling device, FIG. 12 and FIG. 13 are cross-sectional views showing the concrete collecting state according to the embodiment of FIG.
4 is a sectional view showing still another embodiment of the concrete filling confirmation and sampling apparatus of the present invention.

In FIG. 1, a reinforcing bar 2 is erected in advance in a substantially central portion of an excavation hole 1. The steel pipe 3 is inserted so as to cover the rebar 2. At the upper end of the steel pipe 3, a plurality of anchor lines 14
Is fixed. In addition, a gap 4 (cover) having a width (role of 50 mm) is appropriately formed between the steel pipe 3 and the inner wall of the excavation hole 1. As shown in FIGS. 1 and 2, the anchoring line 14 of the steel pipe 3
In this case, four vibrators 7 are equally fixed along the circumference with a vinyl tape in advance, and a measuring scale 9 for measuring the level position of the filled concrete 8 and concrete described later. The filling confirmation and sampling device 13 is positioned and fixed. Further, the steel pipe 3 is vertically moved from the ground 5 side by the lifting tool 12 of the vibrator 7, and the scale of the measuring scale 9 can be read on the ground 5 side. Further, the opening / closing means (which will be described later) of the concrete filling confirmation and sampling apparatus 13 is also formed so as to be operable on the ground 5 side. Placing of concrete into the steel pipe 3 is performed by the tray-mi pipe 10. The traymi pipe 10 transports the watertight concrete 8 and is connected to a concrete supply source (not shown).

Next, the operation of this embodiment will be described. As shown in FIG. 3, the steel pipe 3 is set at an appropriate position, and the concrete 8 is driven into the steel pipe 3 from the tray tube 10. The concrete 8 is driven up to the upper end of the steel pipe 3, spills from the upper end and turns into the gap 4. Here, when the vibrator 7 is operated as shown in FIG. 4, the concrete 8 in the steel pipe 3 is pressed by the vibration of the steel pipe 3 by the vibrator 7 and sinks downward. Due to the pressing force resulting from this sinking, the concrete 8 is pushed toward the gap 4 side and enters, and the concrete level on the gap 4 side becomes higher than the concrete level inside the steel pipe 3. Although the difference between the two levels can be visually confirmed to some extent from the ground 5 side, it can be more accurately confirmed by the concrete filling confirmation and the sampling device 13. That is, as shown in FIG. 5, since the concrete filling confirmation and sampling device 13 is arranged on the outer side of the steel pipe 3, it is possible to confirm whether or not the concrete 8 is present in the gap 4, and at the same time, it is possible to check the gap 4 by the concrete sampling. The quality inspection of the concrete 8 inside becomes possible. As a result, the concrete 8 is further charged from the tray tube 10 and the vibrator 7 vibrates to repeat the operation of matching the levels in the steel pipe 3 and the gap 4.
Further, as shown in FIG. 6, the filling work is completed by lifting the upper end of the steel pipe 3 to the top end portion 11 and performing the filling work of the concrete 8. The top end portion 11 is accurately confirmed by the measuring scale 9. When the confirmation of the concrete filling at the completion of the filling and the quality inspection of the concrete by the sampling device 13 are confirmed, the steel pipe 3 is pulled up from the inside of the excavation hole 1, and the space 15 is provided between the top end 11 and the ground 5 as shown in FIG. The filling work of the cast-in-place concrete pipe pile is completed by filling the surplus concrete 16.

Next, an embodiment of the concrete filling confirmation and sampling device 13 used in the concrete filling method of the present invention will be described. The concrete filling confirmation and sampling device 13 shown in FIG. 8 and FIG.
The support part 17 which is detachably fixed to the 4 side, the concrete sampling tool 18 which is fixed to the lower end side thereof, the plug 19 which is one of the opening and closing means, and the operation cord 20 which is connected to the plug 19. Etc. The concrete sampling tool 18 is in the form of a closed box that opens a concrete entrance 21 upward, and a plug 19 of opening / closing means is inserted into the concrete entrance 21. With the above structure, the concrete sampling tool 18 is put into the cast concrete 8 and the plug 19 is pulled out by the operation string 20 so that the concrete 8 enters the concrete sampling tool 18 from the concrete entrance 21.

Next, another embodiment of the concrete filling confirmation and sampling device will be described with reference to FIG. This concrete filling confirmation and sampling device 13a is formed on a support portion 17a fixed to the anchoring bar 14, a closed basket-shaped concrete sampling device 18a suspended at the lower end thereof, and an upper end of the concrete sampling device 18a. Large concrete entrance 21a and small concrete entrance 21b
And a large plug 19a and a small concrete entrance 21b which are detachably attached to the large concrete entrance 21a.
A small plug 19b that is detachably attached to the plug, and a large plug operating string 20a and a small plug operating string 20 that are connected to these.
b. As shown in FIG. 11, four concrete filling confirmation and sampling devices 13a having the structure shown in FIG. 10 are arranged inside or outside the steel pipe 3 at equal intervals along the circumferential direction. As shown in FIG. 12, when it is necessary to collect or check the concrete 8, the large plug 19a is opened by the large plug operation string 20a, and the large concrete inlet / outlet 21
Concrete sampler 18a from a to concrete 8
Introduce within. In this case, the air in the closed concrete sampling tool 18a is pressed by the concrete 8 into which the air is introduced. In this state, when the small plug operating string 20b is operated to open the small plug 19b, the pressed air is discharged to the small concrete entrance 21b. Therefore, the concrete 8 is smoothly introduced into the concrete sampling tool 18a through the large-scale concrete entrance / exit 21a and is filled therein.

FIG. 14 shows yet another concrete filling confirmation and sampling device 13b. Hollow tube 22 which is a support part
Is fixed to the anchor muscles 14. A concrete tube 24 having an opening 23 is connected to the lower end of the hollow tube 22, and a flexible tube 26 having an opening / closing valve 25 at the upper end.
Are linked. The concrete receiver 24 serves as a concrete sampling tool. The flexible tube 26 communicates with the vacuum source 27. With the above structure, the on-off valve 25
Is released, the inside of the hollow pipe 22 becomes a negative pressure, and the concrete 8 is introduced into the concrete receiver 24 through the opening 23.

Confirmation of the concrete 8 by confirming the concrete filling and the sampling device 13, 13a, 13b, etc. of the above-mentioned structure provided inside or outside the steel pipe 3 and performing the sampling operation according to the driving condition of the concrete 8 In addition, the quality of concrete can be inspected by sampling during the process and after completion of filling.

In the above embodiments, known techniques are applied to the detailed structure. Further, the number and arrangement of the vibrator 7, the concrete filling confirmation and the sampling device 13, etc. are not limited to the above. Further, the concrete filling confirmation and sampling device 13 is not limited to that of the above-mentioned embodiment, and any other device may be used as long as it is provided with the concrete sampling device and the opening / closing means.
The vibrator is a vinyl. It can be easily pulled up after the concrete is filled because it is glued together.

[0017]

According to the present invention, the following remarkable effects are obtained. 1) Concrete is reliably filled in the steel pipe and in the gap between the steel pipe and the excavation hole by the structure in which concrete is placed in the steel pipe while vibrating the steel pipe by the vibrator fixed to the fixed position of the steel pipe, and the concrete is separated. And slime does not get caught. 2) Since the supporting part of the measuring scale moves with the steel pipe and the concrete pouring position is accurately grasped, the concrete is filled up to the top end accurately. 3) Confirming the concrete filling fixed to the steel pipe and arranging the sampling device at an appropriate position and operating during the process to confirm the presence or absence of concrete placement and to inspect the concrete quality from the sampled concrete. And online. 4) The concrete filling confirmation and sampling device has a simple structure consisting of a concrete sampling tool into which concrete is introduced and its opening / closing means, and can be implemented at a relatively low cost.

[Brief description of the drawings]

FIG. 1 is an axial sectional view showing the overall structure of an apparatus for carrying out a concrete filling method of the present invention.

FIG. 2 is a top view of FIG. 1;

FIG. 3 is an explanatory sectional view for explaining a filling method according to the present invention.

FIG. 4 is an explanatory sectional view for explaining a filling method according to the present invention.

FIG. 5 is an explanatory sectional view for explaining a filling method according to the present invention.

FIG. 6 is an explanatory sectional view for explaining a filling method according to the present invention.

FIG. 7 is a partial cross-sectional view showing the final state of concrete filling according to the present invention.

FIG. 8 is a partial sectional view showing an embodiment of the concrete filling confirmation and sampling device of the present invention.

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a partial cross-sectional view of another embodiment of the concrete filling confirmation and sampling device of the present invention.

11 is a schematic plan view showing the placement of the concrete filling confirmation and sampling device shown in FIG. 10 on a steel pipe.

FIG. 12 is a partial cross-sectional view illustrating the concrete filling operation of the concrete filling confirmation and sampling device of FIG.

FIG. 13 is a partial cross-sectional view illustrating the concrete filling operation of the concrete filling confirmation and sampling device of FIG.

FIG. 14 is a cross-sectional view showing still another embodiment of the concrete filling confirmation and sampling apparatus of the present invention.

FIG. 15 is an axial cross-sectional view showing a schematic structure of an apparatus used in a conventional concrete filling method.

FIG. 16 is an explanatory sectional view for explaining a conventional concrete filling method.

FIG. 17 is an explanatory sectional view for explaining a conventional concrete filling method.

FIG. 18 is an explanatory cross-sectional view for explaining a conventional concrete filling method.

[Explanation of symbols]

 1 Drilling Hole 2 Reinforcing Bar 3 Steel Pipe 4 Gap 5 Above Ground 6 Rope 7 Vibrator 8 Concrete 9 Measuring Scale 10 Traemi Tube 11 Top End 12 Elevator 13 Concrete Filling Confirmation and Sampling Device 13a Concrete Filling Confirmation and Sampling Device 13b Concrete Filling Confirmation and sampling device 14 Anchorage 15 Space 16 Extra concrete 17 Support part 17a Support part 18 Concrete sampling tool 18a Concrete sampling tool 19 Plug 19a Large plug 19b Small plug 20 Operating string 20a Large plug Operating string 20b Small plug operation string 21 Concrete inlet / outlet 21a Large concrete inlet / outlet 21b Small concrete inlet / outlet 22 Hollow tube 23 Opening 24 Concrete receiver 25 Open / close valve 26 Flexible tube 27 Vacuum source

Claims (5)

[Claims] 1. Covering a steel pipe around a reinforcing bar in a drill hole,
Fill the concrete in the steel pipe and the gap between the steel pipe and the excavation hole by using the tray-mi pipe while measuring up to a predetermined top end using a measuring scale, and give vibration with a vibrator and collect the concrete to obtain its quality. Is a concrete filling method for casting and forming cast-in-place concrete piles, wherein the vibrator, the measuring scale, and the concrete sampling tool that are vertically moved and controlled from the ground side are fixed to the upper end side of the steel pipe. Fix the anchor to the anchor, check the level position of the concrete placed in the steel pipe by operating the vibrator and check the level of the concrete placed on the scale, and check the presence and quality of the concrete by the concrete sampling tool. After filling the concrete while inspecting, pull up the vibrator. Concrete filling method of cast-in-place steel concrete piles, characterized in that. 2. Covering a steel pipe around the reinforcing bar in the drill hole,
Filling confirmation and sampling device used to check the presence and quality of concrete in the process of filling the inside of the steel pipe and the gap between the steel pipe and the excavation hole up to a predetermined top end with the tray-mi pipe In the apparatus, a supporting portion fixed to a fixing bar fixed to an upper end portion of the steel pipe, a concrete sample collecting tool fixed to a lower end of the supporting portion, and the collecting portion are placed. A concrete filling confirmation and sampling device for cast-in-place concrete piles, which comprises an opening / closing means provided on the sampling tool side so as to communicate with the existing concrete side. 3. The concrete for cast-in-place concrete piles according to claim 2, wherein the concrete sampling tool comprises a closed box body provided with a concrete entrance and exit, and the opening and closing means comprises a plug detachably attached to the concrete entrance and exit. Filling confirmation and sampling device 4. The concrete sampling tool comprises a sealed case having large and small concrete entrances and outlets, and large and small plugs inserted into the large and small concrete entrances respectively. Confirmation of concrete filling and sampling device for cast-in-place concrete piles. 5. The concrete sampling tool comprises a concrete receiving tool having an opening at a lower end thereof and a vacuum means communicating with the receiving tool via a flexible tube, and the opening / closing means is provided with the receiving tool and a vacuum. The concrete filling confirmation and sampling device for a cast-in-place concrete pile according to claim 2, which comprises an on-off valve interposed between the means and the means.