JP2008255775A - Treating device for pile top excess concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce cost by treating the excess concrete formed at the top of a cast-in-place concrete pile before solidifying, and reduce an environmental load by reducing the discharged amount of industrial waste. <P>SOLUTION: This treating device comprises: an insertion pipe 60 inserted into the excess concrete 50 formed at the top of the cast-in-place concrete pile; a high-pressure water supply pipe 70 and a high-pressure air supply pipe 80 disposed in the insertion pipe 60; a high-pressure water supply device 130 for supplying a high-pressure water to the high-pressure water supply pipe 70; and a high-pressure air supply device 140 for supplying a high-pressure air to the high-pressure air supply pipe 80. A high-pressure water jetting hole 90 for jetting the high-pressure water and a high-pressure air jetting hole 100 for jetting the high-pressure air as a set are formed at the end of the insertion pipe 60. Therefore, the cement amount of the excess concrete 50 flows out by the synergism of the high-pressure water and the rising flow of small air bubbles. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus for processing surplus concrete formed on a pile head of a cast-in-place concrete pile before solidification and facilitating subsequent processing of the pile head.

  A cast-in-place concrete pile is one in which an excavation hole is provided in the ground in advance and a concrete pile is formed in the underground by placing concrete in the excavation hole after arranging reinforcing bars and the like in the excavation hole. In the process of forming the cast-in-place concrete pile, after filling the excavation hole with muddy water or the like, the ready-mixed concrete is placed in water. For this reason, muddy water and excavation scraps (slime) etc. may be mixed in the concrete and cause a decrease in strength, and the surplus concrete is removed after a predetermined period of time by placing surplus concrete on the pile head. .

As described above, since extra muddy water and excavation debris are mixed in surplus concrete, the strength may be slightly reduced compared to the main body portion of the concrete pile. However, even if there is a slight decrease in strength, the strength is generally high.
For this reason, after concrete solidifies, in the method of removing surplus concrete using a breaker etc., noise and vibration generate | occur | produce and there exists a possibility of having a bad influence on the surrounding environment. In addition, there is a method of facilitating disassembly by inserting a steel cap into the pile head, but there is a problem that not only the cost increases, but further industrial waste is generated.

  Therefore, various techniques have been proposed for easily carrying out the surfacing concrete formed on the pile heads of cast-in-place concrete piles. For example, the pile head processing method for crushing the surplus concrete of a pile head and improving the efficiency of a lifting work is disclosed (refer patent document 1). The technique described in Patent Document 1 inserts an injection pipe into the pile-up surplus concrete before solidifying the concrete, and injects air from a hole provided at the tip of the injection pipe to reduce the strength of the concrete. By doing so, it is said that the strength of the surplus concrete can be reduced.

  Moreover, the processing jig | tool for forming the low-strength extra-concrete which makes a suspension process easy is disclosed in the pile head of a cast-in-place concrete pile (refer patent document 2). The technique described in this patent document 2 is an air jet body provided with a plurality of jet outlets for jetting air to the surplus concrete, and the air jet body at a planned position for forming surplus concrete in the excavation hole. It is the structure provided with the suspending tool for suspending, and the water supply pipe for supplying water to the surplus concrete formation scheduled position from the outer side of a digging hole. Then, compressed air is supplied to the air jet via an air pipe, the air is jetted from the jet outlet, the vicinity of the air jet is stirred, and the concrete and bentonite solution are mixed, thereby increasing the strength of the surplus concrete. Can be lowered.

JP 2001-288743 A JP 2001-172962 A

  The technique described in the said patent document 1 is going to reduce the intensity | strength of surplus concrete by inject | pouring air into the surplus concrete of a pile head before concrete solidification. However, simply injecting air into surplus concrete has left the cement component, so it was difficult to say that the strength of the concrete could be sufficiently reduced.

  Moreover, the technique described in the said patent document 2 mixes concrete and a bentonite solution by injecting air while supplying water to the surplus concrete formation scheduled position from the outer side of a digging hole. However, simply trying to mix the concrete and bentonite solution by injecting air does not reach the periphery, and it is difficult to say that the strength of the concrete can be sufficiently reduced over the entire pile head. It was.

  The present invention has been proposed in view of the above-described circumstances, and is intended to reduce the cost by processing the surplus concrete formed on the pile head of the cast-in-place concrete pile before solidification, and the amount of industrial waste discharged. An object of the present invention is to provide an apparatus for treating pile head surfacing concrete that can reduce the environmental load by reducing the environmental load.

The pile head surfacing concrete processing apparatus according to the present invention has the following features in order to achieve the above-described object.
That is, the pile head surplus concrete processing apparatus according to the present invention is an apparatus for treating surplus concrete formed on the pile head of the cast-in-place concrete pile before solidification. This pile head surplus concrete processing apparatus includes an insertion pipe inserted into the surplus concrete, a high-pressure water supply pipe and a high-pressure air supply pipe disposed inside the insertion pipe, and high-pressure water to the high-pressure water supply pipe. A high-pressure water supply device that supplies high-pressure air to a high-pressure air supply pipe; And the high-pressure water jet which injects high-pressure water and the high-pressure air jet which injects high-pressure air are provided in the tip part of an insertion pipe as a set, It is characterized by the above-mentioned.

  In order to process the surplus concrete using the pile head surplus concrete processing equipment having such a configuration, the insertion tube is inserted into the surplus concrete before the concrete placed in the excavation hole solidifies. To do. When high-pressure water is supplied to the high-pressure water supply pipe by the high-pressure water supply apparatus and high-pressure air is supplied to the high-pressure air supply pipe by the high-pressure air supply apparatus, high-pressure water is ejected from the high-pressure water outlet, High pressure air is injected from the outlet.

Further, the vicinity of the distal end portion of the insertion tube can be curved in a spiral shape. In this case, it is possible to provide a configuration including a cylindrical tube or a circular spiral plate that reinforces the spiral tip.
In the pile head surplus concrete processing apparatus having such a structure, the cast-in-place concrete having a large diameter (for example, a diameter of 100 cm or more) is provided because the distal end portion of the insertion pipe is located on the outer peripheral side of the center portion of the surplus concrete. Even when a pile is formed, high-pressure air and high-pressure water reach the peripheral portion. At this time, the spiral portion is reinforced by a cylindrical tube or a circular spiral plate.

Further, it is possible to provide a shaft-shaped insertion tube and a spiral-shaped insertion tube that branches from the top of the shaft-shaped insertion tube and surrounds the shaft-shaped insertion tube.
In the pile head surfacing concrete processing equipment having such a configuration, when the insertion pipe penetrates into the pile head surfacing concrete, the spiral insertion pipe rotates around the axis around the shaft-like insertion pipe. Therefore, the penetration property can be improved.

Moreover, it is preferable that the distal end portion of the shaft-shaped insertion tube is positioned below the distal end portion of the spiral insertion tube.
In the pile head surfacing concrete processing apparatus having such a structure, the shaft insertion pipe is first penetrated in the pile head surfacing concrete, and then the spiral insertion centering on the shaft insertion pipe as a rotation center. Since the insertion tube penetrates while rotating around the axis, the straightness of the insertion tube can be maintained.

Moreover, it is possible to provide two or more sets of high-pressure water jets and high-pressure air jets provided at the distal end portion of the shaft-like insertion tube or the spiral insertion tube with their positions shifted from each other. Further, the high-pressure water jet and the high-pressure air jet provided at the tip of the spiral insertion tube are either one of the high-pressure water jet or the high-pressure air jet provided at the tip of the shaft-like insertion tube. It is preferable to provide it at a position opposite to one.
In the pile head surfacing concrete processing apparatus having such a configuration, high pressure water and high pressure air can be sprayed in multiple directions in the pile head surfacing concrete, so the processing range of pile head surfacing concrete ( Range of improvement) can be expanded.

Moreover, it is preferable that the axial insertion pipe and the helical insertion pipe are set so that the vicinity of the joint portion is positioned above the surplus concrete to be processed.
In the pile head surplus concrete processing apparatus having such a configuration, the vicinity of the joint between the shaft-shaped insertion pipe and the spiral insertion pipe does not penetrate into the pile head surplus concrete. In other words, the penetrability can be improved.

Moreover, it is preferable that the insertion pipe is provided with an auxiliary high-pressure water ejection port for ejecting high-pressure water in the insertion direction at the distal end portion.
In the pile head surplus concrete processing apparatus which consists of such a structure, penetrating property can be improved by injecting high pressure water when penetrating an insertion pipe into surplus concrete.

A plurality of high-pressure air jets can be provided so as to surround the high-pressure water jets.
In the pile head surplus concrete processing apparatus having such a configuration, high-pressure air is pushed out by high-pressure water and reaches far.

Further, it is possible to provide an insertion assisting tool for assisting insertion of the insertion tube by installing in the surplus concrete when placing the surplus concrete.
In the treatment measures for pile head surplus concrete having such a configuration, an insertion aid is installed in advance in the surplus concrete, and the insert is inserted into the surplus concrete using this insertion aid.

In addition, a low pressure water supply pipe for supplying a large amount of low pressure water into the surplus concrete and a low pressure water supply device for supplying the low pressure water to the low pressure water supply pipe are provided. It is possible to have a configuration in which a low-pressure water jet port for jetting is provided.
In the pile head surplus concrete processing apparatus having such a configuration, a large amount of low pressure water is supplied into the surplus concrete together with high pressure water and high pressure air.

In the pile head surfacing concrete processing apparatus according to the present invention, high-pressure air refers to air ejected at about 4 to 7 kgf / cm ² , and high-pressure water ejects at about ² to 100 kgf / cm ^2. The low-pressure water refers to water that is ejected at about 10 kgf / cm ² or less. In this case, high-pressure air is supplied by, for example, a compressor, and high-pressure water is supplied by, for example, a high-pressure pump used for a high washer or the like. The low-pressure water is supplied by a construction submersible pump (diameter 2 to 6 inches, maximum discharge rate 0.2 to ³ m ³ / min, total lift 10 to 60 m) that is generally used in foundation work, The actual supply amount from the nozzle is about 100 to 300 liters / minute.

  In the pile head surplus concrete processing apparatus according to the present invention, high-pressure water and high-pressure air are injected into the surplus concrete before the concrete cast in the excavation hole is solidified. The high-pressure air generates an upward flow of small bubbles in the surplus concrete, and the cement content of the surplus concrete can flow out by synergistic action with the high-pressure water. At this time, the high-pressure water and high-pressure air reach the peripheral portion of the surplus concrete.

Therefore, the cement content is washed away over the entire surplus concrete, so that only coarse aggregate such as crushed stone and fine aggregate such as sand can be obtained, and it is possible to remove the surplus concrete without performing a lifting operation. Even if the cement content cannot be completely washed away, the surplus concrete after solidification is hard enough to be easily damaged or destroyed using a hammer, pickaxe, etc. It can be removed.
Furthermore, since the cement is washed away, coarse aggregates and fine aggregates can be reused, and the amount of industrial waste discharged can be reduced.

  In addition, when the tip of the insertion tube is configured to be spirally curved, since the tip of the insertion tube is located on the outer peripheral side of the center portion of the surplus concrete, a large-diameter cast-in-place concrete pile is used. Even in the case of forming, the high-pressure air and high-pressure water reach the peripheral portion, and the strength of the surplus concrete can be reduced. By inserting the insertion tube into the extra concrete while rotating the spiral portion, the insertion tube can be easily penetrated into the extra concrete. At this time, the insertion tube can be prevented from being damaged by reinforcing the spiral portion with a cylindrical tube or a circular spiral plate.

  Further, by providing a shaft-shaped insertion tube and a spiral-shaped insertion tube that branches from the top of the shaft-shaped insertion tube and surrounds the shaft-shaped insertion tube, the penetration of the insertion tube into the surplus concrete is provided. Can be improved. At this time, the tip of the shaft-like insertion tube is positioned below the tip of the spiral insertion tube, or the vicinity of the upper end of the spiral insertion tube is above the surplus concrete to be treated. To further improve the penetration into surplus concrete by setting the height so that it is located, or providing an auxiliary high-pressure water outlet at the tip of the insertion tube that injects high-pressure water in the insertion direction Can do.

  In addition, two or more sets of high-pressure water jets and high-pressure air jets are provided at the tip of the axial insertion tube or the spiral insertion tube, or provided at the tip of the spiral insertion tube. The pile head surplus is provided by providing the high pressure water jet and the high pressure air jet provided at a position facing one of the high pressure water jet and the high pressure air jet provided at the tip of the insertion pipe. The processing range (improvement range) of concrete can be expanded.

  Moreover, when it is set as the structure which supplies a large amount of low pressure water with high pressure water and high pressure air, the washing-off effect | action of a cement part is further strengthened by low pressure water.

Hereinafter, with reference to drawings, the embodiment of the processing device of the surplus concrete concerning the present invention is described.
The processing apparatus for surplus concrete according to the embodiment of the present invention treats surplus concrete formed on the pile head of the cast-in-place concrete pile before solidification, thereby reducing costs and discharging industrial waste. This is a device for reducing the environmental load.
This surplus concrete processing apparatus is suitably used for cast-in-place concrete piles having a diameter of about 1,000 mm to 2,000 mm.

<First Embodiment>
1 to 3 relate to a pile head surfacing concrete processing apparatus according to the first embodiment of the present invention, FIG. 1 is an explanatory view of the state of use, FIG. 2 is an enlarged view of the distal end portion of the insertion tube, FIG. These are enlarged views of a high-pressure water jet and a high-pressure air jet.

  The pile head surfacing concrete processing apparatus 10 according to the first embodiment of the present invention, as shown in FIG. 1 and FIG. 2, after arranging the rebar 30 and the like in the excavation hole 20 provided in the ground, When the concrete is placed in the excavation hole 20 and the cast-in-place concrete pile 40 is created, it is used for processing the surplus concrete 50 at the head of the pile.

  This pile head surplus concrete processing apparatus 10 includes an insertion pipe 60 that is inserted into the surplus concrete 50. A high pressure water supply pipe 70 and a high pressure air supply pipe 80 are connected to the upper part of the insertion pipe 60, and the high pressure water supply pipe 70 and the high pressure air supply pipe 80 are drawn into the insertion pipe 60. In addition, a high-pressure water jet port 90 that is connected to the high-pressure water supply pipe 70 to inject high-pressure water and a high-pressure air that is connected to the high-pressure air supply pipe 80 to inject high-pressure air are connected to the distal end portion of the insertion pipe 60. A spout 100 is provided.

  A swivel joint 110 is attached to the upper end portion of the insertion tube 60, and an annular locking portion 111 is provided on the upper portion of the swivel joint 110. Further, a rod-shaped rotary arm 120 protruding outward from the outer peripheral surface is provided in the middle of the insertion tube 60. In the example shown in FIG. 1, the rod-shaped rotating arms 120 are provided with the circumferential positions shifted by 180 degrees from each other. However, the shape of the rotating arms 120 is not limited to this, and the insertion tube 60 is not provided. An annular handle or the like having a center may be used.

  A high-pressure water supply device 130 for supplying high-pressure water is connected to the other end of the high-pressure water supply pipe 70, and high-pressure air is supplied to the other end of the high-pressure air supply pipe 80. A high-pressure air supply device 140 is connected in communication. The high-pressure air supply device 140 is composed of, for example, a compressor and supplies air at a pressure of about 4 kgf / cm 2. The high-pressure water supply device 130 is composed of, for example, a high-pressure pump used for a high washer or the like, and supplies jet water at a pressure of about 2 to 100 kgf / cm 2.

As shown in FIGS. 1 and 2, the high-pressure water jet 90 and the high-pressure air jet 100 are provided with their circumferential positions shifted from the outer peripheral surface of the insertion tube 60 by 180 degrees. As shown in FIG. 3, a plurality of high-pressure air jets 100 are arranged concentrically around the high-pressure water jet 90.
In the example shown in FIGS. 1 and 2, two sets of high-pressure water jets 90 and high-pressure air jets 100 are provided, but in order to increase the pressure of water and air to be jetted, The high-pressure air jet 100 may be a set. Further, the number and arrangement positions of the respective jet outlets in the one set of the high-pressure water jet 90 and the high-pressure air jet 100 are not limited to those shown in FIG. 3, and can be changed as appropriate. For example, in the vicinity of the distal end portion of the insertion tube 60, various modes such as disposing the high-pressure air jet 100 on the lower side and the high-pressure water jet port 90 on the upper side can be adopted.

  In order to process the surplus concrete 50 using the pile head surplus concrete processing apparatus 10 according to the first embodiment, an appropriately provided support means (not shown) and a locking portion of the swivel joint 110 are provided. A rope (not shown) is spanned between 111 and the processing apparatus 10 is positioned on the top of the pile head. Then, the length of the rope is adjusted, and the insertion pipe 60 is inserted into the extra concrete 50. Thereafter, the insertion tube 60 is pulled out of the extra concrete 50 while operating the rotary arm 120 to rotate the insertion tube 60 about its axis. At this time, the high-pressure water supply device 130 and the high-pressure air supply device 140 are driven to inject high-pressure water from the high-pressure water jet 90 and high-pressure air from the high-pressure air jet 100. When high-pressure water and high-pressure air are injected into the surplus concrete 50, the cement content of the surplus concrete 50 flows out due to the synergistic action of the high-pressure water and the upward flow of small bubbles, and coarse aggregate and fine aggregate Is washed out. Furthermore, depending on conditions, the reinforcing bar 30 can be exposed.

  In this way, the insertion pipe 60 can be gradually inserted into the deep portion of the extra concrete 50 to process the extra concrete 50. And if the cement content of the surplus concrete 50 flows out, the surplus concrete 50 can be processed, without performing a troublesome lifting operation, by removing the remaining coarse aggregate and fine aggregate.

Moreover, although not shown in figure, you may provide the auxiliary | assistant high pressure water jet nozzle which ejects high pressure water toward the insertion direction of the insertion pipe 60 in the front-end | tip part of the insertion pipe 60. FIG. The auxiliary high-pressure water outlet is connected to, for example, a high-pressure water supply pipe 70 and is easily inserted into the surplus concrete 50 by injecting high-pressure water when the insertion pipe 60 is inserted into the surplus concrete 50. The tube 60 can be penetrated. Furthermore, the penetration resistance can be reduced by sharpening the tip of the insertion tube 60 in a conical shape.
The extra concrete 50 may be processed while the insertion pipe 60 is pulled up to a predetermined depth in advance and the insertion pipe 60 is pulled up, or may be performed while the insertion pipe 60 is inserted into the extra concrete 50 from above. (The same applies to other embodiments).

<Second Embodiment>
The pile head surfacing concrete processing apparatus according to the second embodiment is configured to include an insertion assisting tool in addition to the configuration of the pile head surfacing concrete processing apparatus according to the first embodiment described above. It is. With reference to FIG.4 and FIG.5, the processing apparatus of the pile head surplus concrete which concerns on 2nd Embodiment is demonstrated. 4 and 5 relate to a pile head surfacing concrete processing apparatus according to the second embodiment, FIG. 4 is a perspective view of an insertion aid, and FIG. 5 is a pile head surplus in a large diameter cast-in-place concrete pile. It is explanatory drawing explaining the process of embankment.

As shown in FIG. 4, the pile head surplus concrete processing apparatus 210 according to the second embodiment is installed in the surplus concrete 50 at the time of placing the surplus concrete 50 to assist the insertion of the insertion pipe 60. An insertion aid 180 for performing is provided. The insertion assisting tool 180 is a cylindrical member whose inner diameter is set to be slightly larger than the outer diameter of the insertion tube 60 and can be divided into two in the axial direction.
The insertion assisting tool 180 is installed in the surplus concrete 50 before the surplus concrete 50 is hardened, and a drop lid 190 is covered on the lower end portion at the time of installation. Since the other structure is substantially the same as the pile head surfacing concrete processing apparatus 10 according to the first embodiment shown in FIGS. 1 to 3, detailed description thereof is omitted.

  In order to process the surplus concrete using the pile head surplus concrete processing apparatus 210 according to the second embodiment, an insertion assisting tool 180 is installed in the surplus concrete 50 in advance. Then, by inserting the insertion portion 60 from the upper part of the integrated insertion assisting tool 180 and pulling the insertion assisting tool 180 upward, the drop lid 190 is removed and the insertion assisting tool 180 is divided into left and right parts, The insertion assisting tool 180 can be easily pulled out from the surplus concrete 50.

The insertion assisting tool 180 is installed at an appropriate position according to the diameter of the cast-in-place concrete pile. For example, when a cast-in-place concrete pile having a large diameter of 100 cm or more is formed, as shown in FIG. The processing range 200 can be expanded over the range.
Moreover, penetration resistance can be reduced by sharpening the front-end | tip part of the insertion tube 60 to conical shape.

<Third Embodiment>
In addition to the configuration of the pile head surfacing concrete processing apparatus according to the first embodiment described above, the pile head surfacing concrete processing apparatus according to the third embodiment includes a large amount of low pressure near the tip of the insertion tube. It is configured to supply water. With reference to FIG. 6, the processing apparatus of the pile head surplus concrete which concerns on 3rd Embodiment is demonstrated. FIG. 6 is an enlarged view of the distal end portion of the insertion pipe of the pile head surfacing concrete processing apparatus according to the third embodiment.

The pile head surplus concrete processing apparatus 310 according to the third embodiment supplies a large amount of low-pressure water together with high-pressure water and high-pressure air. As shown in FIG. A water supply pipe 150 is connected. In addition, a low-pressure water jet 160 that is connected to the low-pressure water supply pipe 150 and injects a large amount of low-pressure water is provided at the distal end portion of the insertion pipe 60. Further, a low-pressure water supply device 170 for supplying a large amount of low-pressure water is connected to the other end of the low-pressure water supply pipe 150.
Since the other structure is substantially the same as the pile head surfacing concrete processing apparatus 10 according to the first embodiment shown in FIGS. 1 to 3, detailed description thereof is omitted.
The low-pressure water supply device 170 that supplies a large amount of low-pressure water to the low-pressure water supply pipe 150 includes, for example, a high head pump and supplies water at a pressure of about 10 kgf / cm 2 or less. Moreover, the supply amount of low-pressure water is, for example, about 100 to 200 liters / minute.

In the pile head surplus concrete processing apparatus 310 according to the third embodiment, a large amount of low-pressure water is supplied into the surplus concrete 50 by injecting a large amount of low-pressure water from the low-pressure water outlet 160 toward the outer periphery. As a result, the washing out action of the cement is further enhanced.
Moreover, penetration resistance can be reduced by sharpening the front-end | tip part of the insertion tube 60 to conical shape.

<Fourth Embodiment>
With reference to FIG.7 and FIG.8, the processing apparatus of the pile head surplus concrete which concerns on 4th Embodiment is demonstrated. FIGS. 7 and 8 relate to a pile head surfacing concrete processing apparatus according to a fourth embodiment of the present invention, FIG. 7 is an explanatory view of the use state, and FIG. 8 is an enlarged view of the distal end portion of the insertion tube. .

  As shown in FIGS. 7 and 8, the pile head surfacing concrete processing apparatus 410 according to the fourth embodiment is in addition to the configuration of the pile head surfacing concrete processing apparatus 10 according to the first embodiment described above. Thus, the vicinity of the distal end portion of the insertion tube 60 is spirally curved to form a spiral curved portion 610 and a cylindrical tube 620 that reinforces the spiral curved portion 610 is provided. Since the other structure is substantially the same as the pile head surfacing concrete processing apparatus 10 according to the first embodiment shown in FIGS. 1 to 3, parts having the same functions are denoted by the same reference numerals. Detailed description is omitted.

As shown in FIGS. 7 and 8, the pile head surfacing concrete processing apparatus 410 according to the fourth embodiment has a spiral curved portion 610 formed by spirally bending the vicinity of the distal end portion of the insertion tube 60. ing. Moreover, the front-end | tip part of the helical curved part 610 becomes the cone-shaped protrusion part 611, and the insertion resistance to the surplus concrete 50 is reduced.
As shown in FIGS. 7 and 8, the distal end portion of the insertion tube 60 extends downward to form a shaft-shaped portion 60 ′, and the spiral curved portion 610 is branched from the middle of the insertion tube 60. Also good. Furthermore, penetration resistance can be reduced by sharpening the front-end | tip part of axial-shaped part 60 'to a cone shape.

Moreover, the high-pressure water jet 90 and the high-pressure air jet 100 are provided in the front-end | tip part of the spiral curved part 610 in the direction which goes to the outer peripheral part of the surplus concrete 50, and the direction which goes inside. The shapes and the like of the high-pressure water jet 90 and the high-pressure air jet 100 are substantially the same as those in the first embodiment described above.
Furthermore, a cylindrical tube 620 for reinforcing the insertion tube 60 is provided inside the spiral bending portion 610. The diameter and length of the cylindrical tube 620 can be appropriately changed and set according to the shape of the spiral bending portion 610.

  In order to process the surplus concrete 50 by using the pile head surplus concrete processing apparatus 410 according to the fourth embodiment, an appropriately provided support means (not shown) and a locking portion of the swivel joint 110 are provided. A rope (not shown) is spanned between 111 and the processing device is positioned above the pile head. And while adjusting the length of a rope, operating the rotation arm 120 and rotating the insertion pipe 60 around an axis, it penetrates into the surplus concrete 50.

  Here, since the vicinity of the distal end portion of the insertion tube 60 is a helically curved portion 610, the distal end portion of the insertion tube 60 is positioned on the outer peripheral side with respect to the center portion of the surplus concrete 50, so Even when a concrete pile is formed, high-pressure air and high-pressure water can reach the peripheral portion. Further, since the helical curved portion 610 is reinforced by the cylindrical tube 620, the helical curved portion 610 is not bent or damaged.

Then, the high-pressure water supply device 130 and the high-pressure air supply device 140 are driven to inject high-pressure water from the high-pressure water outlet 90 and to inject high-pressure air from the high-pressure air outlet 100. When high-pressure water and high-pressure air are injected into the surplus concrete 50, the cement content of the surplus concrete 50 flows out due to the synergistic action of the high-pressure water and the upward flow of small bubbles, and coarse aggregate and fine aggregate Is washed out and the reinforcing bar 30 is exposed.
In this way, the insertion pipe 60 can be gradually inserted into the deep portion of the extra concrete 50 to process the extra concrete 50. And if the cement content of the surplus concrete 50 flows out, the surplus concrete 50 can be processed, without performing a troublesome lifting operation, by removing the remaining coarse aggregate and fine aggregate.

  Also in the fourth embodiment, an auxiliary high-pressure water jet for injecting high-pressure water toward the insertion direction of the insertion tube 60 may be provided at the distal end portion of the insertion tube 60, or the third embodiment described above. It is good also as a structure which supplies a large amount of low-pressure water near the front-end | tip part of the insertion pipe 60 similarly to a form.

<Fifth Embodiment>
With reference to FIG.9 and FIG.10, the processing apparatus of the pile head surplus concrete which concerns on 5th Embodiment is demonstrated. FIGS. 9 and 10 relate to a pile head surfacing concrete processing apparatus according to a fifth embodiment of the present invention, FIG. 9 is an explanatory view of the use state, and FIG. 10 is an enlarged view of the distal end portion of the insertion tube. .

  As shown in FIGS. 9 and 10, the pile head surfacing concrete processing apparatus 510 according to the fifth embodiment is in addition to the configuration of the pile head surfacing concrete processing apparatus 10 according to the first embodiment described above. Thus, the vicinity of the distal end portion of the insertion tube 60 is spirally curved to form a spiral curved portion 610 and a circular spiral plate 630 that reinforces the spiral curved portion 610 is provided. Since the other structure is substantially the same as the pile head surfacing concrete processing apparatus 10 according to the first embodiment shown in FIGS. 1 to 3, parts having the same functions are denoted by the same reference numerals. Detailed description is omitted.

  As shown in FIGS. 9 and 10, the pile head surfacing concrete processing apparatus 510 according to the fifth embodiment has a spiral curved portion 610 formed by spirally bending the vicinity of the distal end portion of the insertion tube 60. ing. The distal end portion of the spiral curved portion 610 is a conical protruding portion 611, and the insertion resistance to the extra-concrete concrete 50 is reduced.

Moreover, the high-pressure water jet 90 and the high-pressure air jet 100 are provided in the front-end | tip part of the spiral curved part 610 in the direction which goes to the outer peripheral part of the surplus concrete 50, and the direction which goes inside. The shapes and the like of the high-pressure water jet 90 and the high-pressure air jet 100 are substantially the same as those in the first embodiment described above.
Further, a circular spiral plate 630 for reinforcing the insertion tube 60 is provided in the vicinity of the distal end portion of the spiral bending portion 610. The diameter and shape of the circular spiral plate 630 can be appropriately changed and set according to the shape of the spiral tip.

  In order to process the surplus concrete 50 by using the pile head surplus concrete processing apparatus 510 according to the fifth embodiment, an appropriately provided support means (not shown) and a locking portion of the swivel joint 110 are provided. A rope (not shown) is spanned between 111 and the processing device is positioned above the pile head. Then, the length of the rope is adjusted, and the insertion pipe 60 is inserted into the extra concrete 50. Thereafter, the insertion tube 60 is pulled out of the extra concrete 50 while operating the rotary arm 120 to rotate the insertion tube 60 about its axis.

  Here, since the vicinity of the distal end portion of the insertion tube 60 is a helically curved portion 610, the distal end portion of the insertion tube 60 is positioned on the outer peripheral side with respect to the center portion of the surplus concrete 50, so Even when a concrete pile is formed, high-pressure air and high-pressure water can reach the peripheral portion. Further, since the spiral curved portion 610 is reinforced by the circular spiral plate 630, the spiral curved portion 610 is not bent or damaged.

Then, the high-pressure water supply device 130 and the high-pressure air supply device 140 are driven to inject high-pressure water from the high-pressure water outlet 90 and to inject high-pressure air from the high-pressure air outlet 100. When high-pressure water and high-pressure air are injected into the surplus concrete 50, the cement content of the surplus concrete 50 flows out due to the synergistic action of the high-pressure water and the upward flow of small bubbles, and coarse aggregate and fine aggregate Is washed out and the reinforcing bar 30 is exposed.
In this way, the insertion pipe 60 can be gradually inserted into the deep portion of the extra concrete 50 to process the extra concrete 50. And if the cement content of the surplus concrete 50 flows out, the surplus concrete 50 can be processed, without performing a troublesome lifting operation, by removing the remaining coarse aggregate and fine aggregate.

  Also in the fifth embodiment, an auxiliary high-pressure water jet for ejecting high-pressure water toward the insertion direction of the insertion tube 60 may be provided at the distal end portion of the insertion tube 60, or the third embodiment described above. It is good also as a structure which supplies a large amount of low-pressure water near the front-end | tip part of the insertion pipe 60 similarly to a form.

In the fourth embodiment and the fifth embodiment described above, the cylindrical tube 620 and the circular spiral plate 630 are provided to reinforce the helical curved portion 610. However, the helical curved portion 610 needs to be reinforced. If not, the cylindrical tube 620 and the circular spiral plate 630 can be omitted.
In addition, when the fourth embodiment and the fifth embodiment described above are applied to a large-diameter cast-in-place concrete pile, insertion pipes are provided at a plurality of locations in the excavation hole as in the example shown in FIG. By penetrating, it is possible to expand the processing range over almost the entire range of the surplus concrete.

<Sixth Embodiment>
With reference to FIG. 11 thru | or FIG. 14, the processing apparatus of the pile head surplus concrete which concerns on 6th Embodiment is demonstrated. FIGS. 11 to 14 relate to a pile head surfacing concrete processing apparatus according to a sixth embodiment of the present invention, FIG. 11 is a perspective view, and FIG. 12 is an axial insertion tube and a helical insertion tube. FIG. 13 is an enlarged view of the distal end portion of the axial insertion tube, and FIG. 14 is an enlarged view of the distal end portion of the spiral insertion tube.

As shown in FIGS. 11 to 14, the pile head surfacing concrete processing device 710 according to the sixth embodiment is one in the pile head surfacing concrete processing device 10 according to the first embodiment described above. The inserted insertion tube 60 is composed of an axial insertion tube 800 and a helical insertion tube 810 that surrounds the periphery of the axial insertion tube 800.
Since the other structure is substantially the same as the pile head surfacing concrete processing apparatus 10 according to the first embodiment shown in FIGS. 1 to 3, parts having the same functions are denoted by the same reference numerals. Detailed description is omitted.

  As shown in FIG. 11, the pile head surfacing concrete processing apparatus 710 according to the sixth embodiment surrounds the periphery of the insertion pipe 800 by branching from the upper part of the insertion pipe 800 and the insertion pipe 800. And a spiral insertion tube 810. Here, the lower end portion of the shaft-like insertion tube 800 is located about 10 cm below the lower end portion of the spiral insertion tube 810. Further, the vicinity of the joint portion between the shaft-like insertion tube 800 and the spiral insertion tube 810 is set to be positioned above the surplus concrete to be processed.

  Moreover, the high-pressure water outlet 90 which is connected to the high-pressure water supply pipe 70 to inject high-pressure water and the high-pressure air supply pipe 80 are connected to the distal end portions of the insertion pipes 800 and 810 and high-pressure air is injected. A high-pressure air outlet 100 is provided. The high-pressure water jet 90 and the high-pressure air jet 100 provided in the shaft-like insertion tube 800 are provided with their circumferential positions shifted from each other by 180 degrees from the outer peripheral surface of the insertion tube 800. That is, one high-pressure water jet 90 and the high-pressure air jet 100 are provided toward the center side of the surplus concrete, and the other high-pressure water jet 90 and the high-pressure air spout 100 are located outside the surplus concrete. It is provided. Furthermore, in the axial insertion tube 800, the high-pressure water jet 90 and the high-pressure air jet 100 may be provided side by side.

The high-pressure water jet 90 and the high-pressure air jet 100 of the spiral insertion pipe 810 are provided in a direction toward the outer peripheral portion of the surplus concrete and in a direction toward the inside. In this case, the plurality of high-pressure water jets 90 and the high-pressure air jets 100 may be arranged to eject high-pressure water and high-pressure air toward substantially the same processing position, or toward different processing positions. You may arrange | position so that high pressure water and high pressure air may be ejected.
Furthermore, as shown in FIG. 12, the high-pressure water jet 90 and the high-pressure air jet 100 of the axial insertion pipe 800 and the high-pressure water jet 90 and the high-pressure air jet 100 of the spiral insertion pipe 810 are: It is provided at a position facing each other. Further, as shown in FIGS. 13 and 14, a plurality of high-pressure air jets 100 are arranged concentrically around the high-pressure water jet 90.

  The distal end portion of the shaft-shaped insertion tube 800 is a conical protrusion 801. Further, the distal end portion of the spiral insertion tube 810 is a conical protruding portion 811. Thus, the insertion resistance to surplus concrete can be reduced by making the front-end | tip part of the insertion pipes 800 and 810 into the cone-shaped protrusion parts 801 and 811. FIG.

  In the pile head surplus concrete processing apparatus 710 according to the sixth embodiment, the swivel joint 110 is attached to the upper end portion of the insertion pipe 800, and an annular locking portion 111 is provided on the upper portion of the swivel joint 110. It has been. Further, below the swivel joint 110, a rod-shaped rotating arm 120 protruding outward from the outer peripheral surface is provided. In the example shown in FIG. 11, the rod-shaped rotating arms 120 are provided with the circumferential positions shifted by 180 degrees from each other. However, the shape of the rotating arms 120 is not limited to this, and the insertion tube 800 is provided. An annular handle or the like having a center may be used.

Further, a high-pressure water supply pipe 70 and a high-pressure air supply pipe 80 are connected to the upper part of the swivel joint 110, and the high-pressure water supply pipe 70 and the high-pressure air supply pipe 80 are connected to an axial insertion pipe 800 and a spiral insertion. It is drawn into the tube 810.
In the pile head surfacing concrete processing apparatus 710 according to the sixth embodiment, the high pressure water supply pipe 70 and the high pressure air supply pipe 80 are connected to the upper part of the swivel joint 110, so that the rotary arm 120 is used to form the shaft. Even when the insertion tube 800 and the spiral insertion tube 810 are rotated, the high-pressure water supply tube 70 and the high-pressure air supply tube 80 are not entangled with other members.

  In order to process the surplus concrete using the pile head surfacing concrete processing apparatus 710 according to the sixth embodiment, appropriately provided support means (not shown) and the locking portion 111 of the swivel joint 110 are provided. A rope (not shown) is spanned between the two and the processing device is positioned above the pile head. Then, the length of the rope is adjusted, and the rotary arm 120 is operated to rotate the shaft-like insertion tube 800 and the spiral insertion tube 810 around the axis while penetrating into the extra-concrete concrete.

Then, the high-pressure water supply device 130 and the high-pressure air supply device 140 are driven to inject high-pressure water from the high-pressure water outlet 90 and to operate the rotary arm 120 while injecting high-pressure air from the high-pressure air outlet 100. Then, the shaft-like insertion tube 800 and the spiral insertion tube 810 are rotated about the axis and pulled out from the surplus concrete. When high-pressure water and high-pressure air are injected into the surplus concrete, the cement content of the surplus concrete flows out due to the synergistic effect of the high-pressure water and the upward flow of small bubbles, and the coarse and fine aggregates are washed. It is taken out and the reinforcing bar 30 is exposed.
In this manner, the shaft-shaped insertion tube 800 and the spiral insertion tube 810 can be gradually pulled out from the deep portion of the surplus concrete, and the surplus concrete can be processed. And if the cement part of surplus concrete flows out, surplus concrete can be processed, without performing a troublesome lifting operation by removing the remaining coarse aggregate and fine aggregate.

  Also in the sixth embodiment, auxiliary high-pressure water jets for injecting high-pressure water toward the insertion direction of the insertion tubes 800 and 810 are provided at the distal ends of the shaft-shaped insertion tube 800 and the spiral insertion tube 810. Alternatively, a large amount of low-pressure water may be supplied to the vicinity of the distal end portion of the shaft-like insertion tube 800 or the spiral insertion tube 810 as in the third embodiment described above.

  According to the pile head surfacing concrete processing apparatus 710 according to the sixth embodiment, the distal end portion of the shaft-shaped insertion tube 800 is positioned below (for example, about 10 cm) from the distal end portion of the spiral insertion tube 810. Or set the height so that the vicinity of the upper end of the spiral insertion tube 810 is positioned above the surplus concrete to be treated, or inject high-pressure water onto the tip of the insertion tube in the insertion direction. By providing the auxiliary high-pressure water jetting port, it is possible to improve the penetration into the surplus concrete. Further, at the distal end of the shaft-like insertion tube 800, two or more high-pressure water jets 90 and high-pressure air jets 100 are provided with their circumferential positions shifted or their vertical positions shifted from each other. The high-pressure water jet 90 and the high-pressure air jet 100 provided at the tip of the insertion pipe 810 are opposed to any one of the high-pressure water jet 90 and the high-pressure air jet 100 provided at the tip of the insertion pipe. By providing in the position to perform, the processing range (improvement range) of pile head surplus concrete can be expanded.

<Examples of pile head surplus concrete>
Next, with reference to FIG. 15, an example of the process by the processing apparatus of pile head surplus concrete which concerns on embodiment of this invention is demonstrated. FIG. 15 is an explanatory diagram showing an example of processing by the pile head surfacing concrete processing apparatus according to the embodiment of the present invention.
The pile head surfacing concrete processing apparatus according to the embodiment of the present invention can be applied to a large-diameter excavation hole. For example, as shown in FIG. 15, the vicinity of the central portion of the excavation hole 20 is processed using the processing apparatus B having a spiral insertion pipe, and the peripheral portion of the excavation hole 20 is a process having an axial insertion pipe. By processing using apparatus A, pile head surplus concrete can be processed to every corner.
<Other embodiments>
In the above-described embodiment, the insertion tube 60 and the like are rotated manually by operating the rotary arm 120. However, a rotation device using a motor and gears is provided, and the insertion tube 60 and the like are rotated by the rotation device. May be.

Explanatory drawing of the use condition of the processing apparatus of the pile head surplus concrete which concerns on the 1st Embodiment of this invention. The enlarged view of the insertion tube front-end | tip part of the processing apparatus of the pile head surplus concrete which concerns on the 1st Embodiment of this invention. The enlarged view of the high-pressure water jet outlet and high-pressure air jet nozzle of the pile head surplus concrete processing device concerning a 1st embodiment of the present invention. The perspective view of the insertion auxiliary tool used for the processing apparatus of pile head surplus concrete which concerns on the 2nd Embodiment of this invention. Explanatory drawing explaining the process of pile head surplus concrete in a large diameter cast-in-place concrete pile. The enlarged view of the front-end | tip part of the insertion pipe and low-pressure water supply pipe of the processing apparatus of pile head surplus concrete which concerns on the 3rd Embodiment of this invention. Explanatory drawing of the use condition of the processing apparatus of the pile head surplus concrete which concerns on the 4th Embodiment of this invention. The enlarged view of the insertion pipe front-end | tip part of the processing apparatus of the pile head surplus concrete which concerns on the 4th Embodiment of this invention. Explanatory drawing of the use condition of the processing apparatus of the pile head surplus concrete which concerns on the 5th Embodiment of this invention. The enlarged view of the insertion tube front-end | tip part of the processing apparatus of the pile head surplus concrete which concerns on the 5th Embodiment of this invention. The perspective view of the processing apparatus of the pile head surplus concrete which concerns on the 6th Embodiment of this invention. The enlarged view which shows the positional relationship of the shaft-shaped insertion pipe | tube of the pile head surfacing concrete processing apparatus which concerns on the 6th Embodiment of this invention, and a helical insertion pipe | tube. The enlarged view of the front-end | tip part of the shaft-shaped insertion pipe of the processing apparatus of pile head surfacing concrete which concerns on the 6th Embodiment of this invention. The enlarged view of the front-end | tip part of the helical insertion pipe of the processing apparatus of the pile head surplus concrete which concerns on the 6th Embodiment of this invention. Explanatory drawing which shows an example of the process by the processing apparatus of pile head surplus concrete which concerns on embodiment of this invention.

Explanation of symbols

10, 210, 310, 410, 510, 710 Pile head surplus concrete processing equipment 20 Excavation hole 30 Reinforcement 40 Cast-in-place concrete pile 50 Extra concrete 60 Insertion pipe 60 'Shaft part 70 High pressure water supply pipe 80 High pressure air supply Pipe 90 High-pressure water jet 100 High-pressure air jet 110 Swivel joint 111 Locking portion 120 Rotating arm 130 High-pressure water supply device 140 High-pressure air supply device 150 Low-pressure water supply pipe 160 Low-pressure water jet 170 Low-pressure water supply device 180 Insertion aid 190 Drop lid 200 Processing range 610 Spiral curved portion 611, 801, 811 Protruding portion 620 Cylindrical tube 630 Circular spiral plate 800 Shaft-shaped insertion tube 810 Spiral insertion tube A Processing device B having shaft-shaped insertion tube B Spiral Processing apparatus having an insertion tube

Claims (13)

It is a device for processing surplus concrete formed on the pile head of cast-in-place concrete pile before solidification,
An insertion tube to be inserted into the surplus concrete,
A high-pressure water supply pipe and a high-pressure air supply pipe disposed inside the insertion pipe;
A high-pressure water supply device for supplying high-pressure water to the high-pressure water supply pipe;
A high-pressure air supply device for supplying high-pressure air to the high-pressure air supply pipe;
With
A pile head surfacing concrete processing apparatus, characterized in that a high-pressure water jet for jetting high-pressure water and a high-pressure air jet for jetting high-pressure air are provided as a set at the distal end of the insertion pipe.   The processing apparatus for pile head surfacing concrete according to claim 1, wherein the vicinity of the distal end portion of the insertion pipe is spirally curved.   3. The pile head surfacing concrete processing apparatus according to claim 2, further comprising a cylindrical tube that reinforces the spiral tip.   The pile head surfacing concrete processing apparatus according to claim 2, further comprising a circular spiral plate that reinforces the spiral tip.   2. The insertion tube includes an axial insertion tube and a spiral insertion tube that branches from an upper portion of the axial insertion tube and surrounds the periphery of the axial insertion tube. Pile head surplus concrete processing equipment as described.   6. The pile head surfacing concrete processing apparatus according to claim 5, wherein a distal end portion of the shaft-shaped insertion tube is positioned below a distal end portion of the spiral insertion tube.   The high-pressure water jet and the high-pressure air jet provided at the tip of the shaft-like insertion tube or the spiral insertion tube are provided in two or more sets with their positions shifted from each other. Or the pile head surplus concrete processing apparatus of 6.   The high-pressure water jet and the high-pressure air jet provided at the tip of the spiral insertion pipe are either one of the high-pressure water jet and the high-pressure air jet provided at the tip of the shaft-like insertion pipe. The pile head surfacing concrete processing apparatus according to any one of claims 5 to 7, wherein the pile head surfacing concrete processing apparatus is provided at a position opposite to each other.   9. The shaft-like insertion tube and the spiral insertion tube are set so that the vicinity of the joint is positioned above the surplus concrete to be treated. The processing apparatus of pile head surplus concrete of any one of Claims.   The pile head surfacing concrete according to any one of claims 1 to 9, wherein the insertion pipe is provided with an auxiliary high-pressure water jet for jetting high-pressure water in an insertion direction at a tip portion thereof. Processing equipment.   The pile head surfacing concrete processing apparatus according to any one of claims 1 to 10, wherein a plurality of high-pressure air jets are provided so as to surround the high-pressure water jets.   The insertion assisting tool for installing in the surplus concrete when placing surplus concrete and for assisting the insertion of the insertion tube is provided. Pile head surplus concrete processing equipment. A low-pressure water supply pipe for supplying a large amount of low-pressure water into surplus concrete,
A low-pressure water supply device for supplying low-pressure water to the low-pressure water supply pipe;
With
The pile head surfacing concrete processing apparatus according to any one of claims 1 to 12, wherein a low-pressure water outlet for injecting a large amount of low-pressure water is provided at a distal end portion of the insertion pipe. .

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