JP2017043942A - Device and method for removing attachment on inner surface of hollow pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly and reliably cleanse attachments, such as sediment and soil cement, attached to the inner surface of a hollow pile 5 over the whole inner surface of the hollow part 5 while discharging the cleansed attachments and slurry to the outside (the ground) reliably for removal.SOLUTION: A device for removing attachment on an inner surface of a hollow pile comprises a cylindrical elevating body 1 for reciprocating inside a hollow pile 5, an annular jet pipe 2 that is attached to the elevating body 1 and that has a plurality of injection nozzles 6 facing the inner surface of the hollow pile 5, a scraper 3 a tip edge of which is pressed against the inner surface of the hollow pile 5 when the elevating body 1 is elevated or lowered, and a guide wheel 4 for allowing the elevating body 1 to maintain a predetermined interval to the inner surface of the hollow pile 5, and when the elevating body 1 is elevated or lowered in the hollow pile 5, cleansing fluid supplied to the jet pipe 2 is jetted to the inner surface of the hollow pile 5 from the injection nozzles 6 and attachments on the inner surface of the hollow pile 5 is scraped by the scraper 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inner surface of a hollow pile (for example, a steel pipe pile, a ready-made concrete pile), and an inner surface of a hollow pile that removes adhered materials such as earth and sand and soil cement on the inner surface of the hollow pile after being set up. The present invention relates to a removing device and a deposit removing method.

  Conventionally, in order to increase the tip bearing capacity of ready-made concrete piles and steel pipe piles, there is known a method of building a root consolidation bulb expanded as compared to the pile shaft diameter, a so-called expansion root consolidation bulb at the pile tip. In recent years, a high bearing capacity pile construction method has been developed in which the enlargement ratio of the enlarged root bulb with respect to the pile shaft diameter is increased and a greater tip bearing capacity is exhibited.

In general, in pile design, the higher the vertical load, the greater the applied horizontal force. Therefore, high bearing capacity piles are required to have high bending performance because the acting horizontal force is larger than that of conventional piles. In order to ensure this, SC piles are generally used in ready-made concrete piles, but in steel pipe piles, this can be dealt with by increasing the plate thickness or increasing the pile diameter.
However, because there is an upper limit to the plate thickness that can be produced for spiral steel pipes used in the current steel pipe pile construction method, and because there are restrictions on the diameter of piles that can be constructed, the required bending performance may not be ensured. is there. In this case, it is necessary to take measures by increasing the number of piles, which is very uneconomical.

Therefore, a method of ensuring bending performance by applying a concrete-filled steel pipe pile (hereinafter referred to as CFT) structure, which is intended to improve bending performance by filling concrete inside the steel pipe pile, is adopted. Sometimes. Thereby, since the bending rigidity of a pile becomes large and the required bending performance can be ensured, economic design is possible without increasing the number of piles.
However, earth and sand, soil cement, etc. are attached to the inner surface of the pile near the pile head immediately after construction. In order to obtain a CFT structure, it is necessary to cleanly remove them and to cast concrete.

  In addition, in order to integrally form the pile head and the reinforced concrete including the reinforced cage when the reinforced cage is inserted into the pile head of the hollow pile that has been sunk and the concrete is further cast into reinforced concrete. Therefore, it is necessary to ensure adhesion between the two, and for that purpose, there is no deposit such as earth and sand or soil cement on the inner surface of the pile head.

Conventionally, as an apparatus and method for removing deposits such as earth and sand and soil cement attached to the inner surface of such a hollow pile,
(1) Insert the lower part of the main body of the cleaning device into the pile head of the hollow pile, place it on the top of the pile head with the pile head contact plate, and install water or water from the jetting means at the bottom of the main body toward the inner wall of the pile head. One that ejects air to remove deposits (see, for example, Patent Document 1).
(2) The lower injection port in which the main body of the removal device suspended from the heavy machine is made of a steel pipe that can be inserted into the steel pipe pile, and the pressurized water can be injected to the ground inside the steel pipe pile on the lower side of the main body of the removal device. And an air outlet that can inject air into the inside of the apparatus body is provided, and by injecting pressurized water from the lower injection port onto the ground inside the steel pipe pile, the soil constituting the ground is liquefied, Muddy water liquefied by water pressure and air pressure supplied from an air outlet is discharged out of the steel pipe pile and removed (see, for example, Patent Document 2).
(3) A device body in which a plurality of jet pipes with a plurality of jet nozzles arranged on the outer periphery of the machine frame on which the drainage pump is mounted is moved up and down into the hollow of the hollow pile, and the jet pipe jet nozzle The thing which injects water more (patent document 3), etc. are proposed.

JP 2002-115249 A Japanese Patent No. 2681760 Japanese Patent No. 5245503

However, in the conventional apparatus and method shown in (1), the lower part of the main body of the apparatus is inserted into the pile head of the hollow pile, and the pile head contact plate is seated on the upper surface of the pile head. Since the deposits are removed by ejecting water or air from the means toward the inner wall surface of the pile head, if there are several types of wall length in the depth direction to be removed, the required length of the lower part of the main body is There is a problem that several kinds of different processing (removal) apparatuses are required, which is not practical. In addition, when there is no drainage function, if the length is long, it will be difficult to discharge the deposits to the ground. After the deposits become muddy, they will become sediment again and accumulate in the pile head. There is.

  Furthermore, if the removal range in the depth direction of the inner wall surface of the hollow pile is long, the length of the lower part of the main body has to be increased in order to cope with it, so that the processing device becomes longer and difficult to handle, and the ejection means of the lower main body There is a high possibility that the water outlet is submerged due to groundwater, rainwater, or washing water. In this case, there is a problem that the water pressure to be ejected is significantly attenuated in the water and the cleaning power is reduced.

  In addition, the conventional sand removal apparatus and method shown in (2) above is such that pressurized water is sprayed from the lower injection port toward the bottom of the steel pipe pile, the soil constituting the ground is liquefied, and the steel pipe pile is easily pulled out. This is different from the removal of deposits on the inner surface of the steel pipe pile proposed in the present invention. However, even in this conventional apparatus, when the removing apparatus main body descends in the steel pipe pile, there is a possibility that the deposits can be removed by ejecting pressurized water toward the inner surface of the pile. However, even if it is used in this way, the conventional apparatus (2) and method have the following problems. Since air supply is required in addition to water ejection, and the air is blown into the inner pipe, the problem is that the apparatus is complicated and large, and the cost is high. There are problems and issues similar to those shown in the apparatus.

In addition, the conventional sand removal device and method shown in (1) and (2) above are for removing deposits on the inner surface of the pile using only pressurized water and air pressure. On the other hand, since it is not maintained at a constant interval (distance), unevenness is generated in the action of removing the deposit, and it takes time to remove the deposit adhering to the inner surface of the pile. In addition, there is a disadvantage that highly viscous deposits remain on a part of the inner surface of the pile and the removal thereof becomes incomplete. On the other hand, in order to completely remove the deposits, it is necessary to repeat the process several times, and it takes time for the removal work, and a large compressor or pump may be used. However, there was a disadvantage that it was large and expensive.
In addition, the deposit removing device and method on the inner surface of the hollow pile described in (3) above can be removed if the deposits on the inner surface of the hollow pile are firmly adhered, without increasing the descending and raising operations. There is a problem that the time becomes longer and a removal residue is generated in some cases, and as a result, workability is lowered and the use of washing water is increased.

  The present invention solves the conventional problems as described above, and the object of the present invention is not affected by the properties of deposits such as earth and sand and soil cement adhered to the inner surface of the hollow portion of the hollow pile. In addition, it is possible to reliably and quickly clean and remove the entire inner surface of the hollow pile uniformly and quickly, and to remove the adhered matter and muddy water that has been washed out to the outside (above ground). It is to provide a removal method.

  In order to achieve the above object, a deposit removing device for an inner surface of a hollow pile according to the present invention includes a cylindrical lifting body inserted into a hollow pile set in the ground so as to be able to reciprocate (lift), and the lifting body. And an annular jet pipe having a plurality of injection nozzles at a position facing the inner surface of the hollow pile, and the lifting body, the tip edge is pressed against the inner surface of the hollow pile when the lifting body is raised and lowered A scraper, and a guide attached to the elevating body and abutting the elevating body against the inner surface of the hollow pile so as to maintain a certain distance from the inner surface of the hollow pile, and the elevating body in the hollow pile When moving up and down, the cleaning fluid supplied to the ejection pipe is jetted from the spray nozzle onto the deposit on the inner surface of the hollow pile, and the deposit on the inner surface of the hollow pile is scraped off by the scraper.

With this configuration, while the elevating body is inserted into the hollow pile and lowered from the upper end opening or raised from a predetermined lowered position, a plurality of injections provided in the annular ejection pipe at the time of lowering or rising By injecting air and / or water from the nozzle toward the inner surface of the hollow pile, and additionally forcibly scraping off the adhering material adhering to the inner surface of the hollow pile with a scraper, the inner surface of the inner surface of the hollow pile can be quickly removed by a synergistic effect. Can be reliably removed. Moreover, even if the deposit is firmly attached to the inner surface of the hollow pile, it can be scraped off by the scraper. In these cases, the elevating body is guided by the guide so as to maintain a certain distance from the inner surface of the hollow pile, so that eccentricity is prevented, and compressed air and pressurized water are distributed over the entire inner circumferential surface of the hollow pile. It is injected at a uniform pressure, and deposits on the inner surface of a predetermined range of piles can be removed completely and efficiently. The muddy water generated by this removal work is drained to the outside by a drain pump.
In addition, since the scraper acts to remove the deposits on the inner surface of the hollow pile, there is a cleaning effect even if the amount of water (washing water) used is small. This makes it possible to perform a cleaning operation with reduced pressure. In particular, when cleaning is performed by injecting a mixed fluid of air and water onto the inner surface of the hollow pile, there is a cleaning effect even if the amount of water used is smaller. In such a case, drainage of muddy water is not required, so that workability is improved and installation of a pump is also unnecessary. Even when necessary, the pump can be reduced in size, weight, and drainage time can be shortened.

  Further, in the deposit removing device on the inner surface of the hollow pile, the drainage for draining the mud after cleaning by using water or air or a mixed fluid of water and air as the cleaning fluid. In addition to eliminating the need for a pump, the amount of cleaning water (muddy water) generated is small and the amount of cleaning water (muddy water) generated is small because there is little reduction in cleaning capacity even if the amount of cleaning water is reduced. Is often within the range of the pool for cleaning water (muddy water). In this case, muddy water is not required to be drained, which is preferable. Moreover, the use of an expensive and large-capacity pump can be avoided.

  Further, in the deposit removal apparatus for the inner surface of the hollow pile, the annular ejection pipe is composed of an air ejection pipe and a water ejection pipe, an air supply pipe is connected to the air ejection pipe, and a water ejection pipe is connected to the water ejection pipe. When the supply pipe is connected and air can be selectively supplied to the air jet pipe and water to the water jet pipe, the water supply to the water jet pipe is stopped. Inject air only from the injection nozzle, stop supplying air to the air ejection pipe and inject water only from the injection nozzle of the water ejection pipe, or inject air and water from the ejection nozzle of each ejection pipe simultaneously Since it can be selectively constructed, the removal work can be carried out efficiently by selecting and injecting according to the properties of the adhered matter on the inner surface of the hollow pile. In particular, the amount of water can be reduced due to the presence of the scraper. As a result, the amount of muddy water generated can be kept within the range of the muddy water pool, and the muddy water draining operation becomes unnecessary.

  Further, in the deposit removing apparatus for the inner surface of the hollow pile, the annular ejection pipe is constituted by a water ejection pipe having a plurality of water and air mixed fluid ejection nozzles, and water and air are supplied to the mixed fluid ejection nozzles. And if the mixed fluid of water and air is jetted, the removal capability of the deposit | attachment of a hollow pile inner surface will become high, and a removal operation | work can be implemented efficiently. Therefore, the deposits can be removed even if the amount of water used is small due to a synergistic effect with the scraper. As a result, the amount of muddy water generated can be kept within the muddy water pool.

  Further, in the deposit removing device for the inner surface of the hollow pile, the scraper is supported by a spring so as to be elastically pressed against the inner surface of the hollow pile so that the inner surface of the hollow pile can move forward and backward. Even if there are irregularities in the scraper, the scraper will advance and follow, so even if the inner surface of the hollow pile is uneven (for example, corrugated irregularities), even if the deposit is raised and adhered to the inner surface of the hollow pile, It becomes possible to respond.

  Further, in the deposit removing apparatus for the inner surface of the hollow pile, the deposit attached to the inner surface of the hollow pile is forcibly made by making at least a portion of the scraper that contacts the inner surface of the hollow pile, that is, the tip edge portion into a rubber piece. When scraping off, the inner surface of the hollow pile is elastically contacted and softly scraped off, so that it is possible to reliably remove deposits with high adhesive force without damaging the inner surface of the hollow pile.

  Moreover, in the deposit removal apparatus on the inner surface of the hollow pile, a drainage pump is installed in the lifting body, and a water suction port for discharging mud water in the hollow pile to the outside of the hollow pile is from an ejection nozzle of the ejection pipe. Since it is provided at the lower level, the level of the muddy water generated in the cleaning operation can be drained by the drain pump before reaching the spray nozzle. Therefore, jetting of the washing water in water (muddy water) can be avoided, pressure attenuation of compressed air and pressurized water does not occur, and the washing ability does not deteriorate.

Moreover, in the deposit removal method on the inner surface of the hollow pile, after placing the hollow pile in the ground, the lifting body constituting the deposit removal apparatus was inserted into the hollow pile from the upper opening, and the lifting body was provided By supplying the cleaning fluid to the annular jet pipe, the lifting body is lowered and raised while jetting the cleaning fluid toward the inner surface of the hollow pile from the spray nozzle provided in the jet pipe, and the lift body By pressing the tip edge of the protruding scraper against the inner surface of the hollow pile, the deposits on the inner surface of the hollow pile can be scraped off, washed and removed, and the device body is lowered by hanging it with a heavy machine such as a crane. Or, just by lifting (lifting), the scraper can scrape off the deposits on the inner surface of the hollow pile while cleaning the deposits on the inner surface of the hollow pile with water or air sprayed from the spray nozzle. Kill. In addition, when water is used to wash the deposits on the inner surface of the hollow pile, it is possible to avoid the attenuation of the spray force of water and air injected from the injection nozzle by the muddy water accumulated in the hollow pile, and drain the muddy water. It can be quickly discharged out of the hollow pile by a pump.
In addition, since there is a scraper, the cleaning effect can be exerted even if the amount of water used is reduced, so that the amount of muddy water generated can be kept within the range of the muddy water pool, eliminating the need for drainage work. Can be shortened.

According to the deposit removing device and the deposit removing method on the inner surface of the hollow pile of the present invention, the following effects can be obtained.
(1) Since air and / or water is jetted onto the inner surface of the hollow pile, and the adhering material adhering to the inner surface of the hollow pile is forcibly scraped off by the scraper, earth and sand and soil adhering to the inner surface of the hollow pile due to its synergistic effect Adherents such as cement can be quickly and reliably cleaned evenly over the entire inner surface of the hollow pile.
(2) Even if the deposit is firmly attached to the inner surface of the hollow pile, it can be scraped off by the scraper, so that it can be cleaned quickly and reliably.
(3) Muddy water generated by washing can be discharged to the outside by a drain pump. Therefore, by discharging the generated muddy water with the drainage pump before reaching the injection nozzle of the discharge pipe, it is possible to avoid injection of air or water in muddy water (underwater), the attenuation of the injection force does not occur, and the cleaning ability is reduced. There is no decline.
(4) Since there is a scraper, there is a cleaning effect even if the amount of water to be sprayed is small, and the amount of generated muddy water can be kept within the muddy water pool, eliminating the need for drainage work, and workability Will improve.

  The present invention has been briefly described above. The best mode for carrying out the present invention will be described below in detail with reference to the accompanying drawings.

It is a partial cross section front view of the deposit removal apparatus of the hollow pile inner surface which shows embodiment of this invention. It is a top view of the raising / lowering body in FIG. It is the top view (b) of the raising / lowering body shown to the partial cross section front view (a) and (a) of the principal part of the deposit removal apparatus of the hollow pile inner surface which shows other embodiment of this invention. It is a partial cross section front view of the principal part of the deposit removal apparatus of the hollow pile inner surface which shows other embodiment of this invention. It is a bottom view of the deposit removal apparatus of a hollow hole inner surface. It is the top view (a) and front view (b) which show the structure of a scraper. It is the top view (a) and front view (b) which show other embodiment of a scraper. It is explanatory drawing which shows the deposit removal method of a hollow pile inner surface in process order (a) (b) (c) (d) (e) (f).

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a partial cross-sectional front view showing the entire deposit removing device for the inner surface of a hollow pile according to the present embodiment, and FIG. 2 is a plan view of the lifting body in FIG. The apparatus for removing deposits on the inner surface of a hollow pile according to the present embodiment includes an elevating body 1, an ejection pipe 2, a scraper 3, and a guide wheel 4 as a guide. Among these, the lifting / lowering body 1 has a cylindrical shape (cylindrical shape), and is inserted into the hollow pile 5 having an inner diameter larger than the outer diameter of the lifting / lowering body 1 so as to be reciprocally movable in the depth direction of the hollow pile 5. . The lifting body 1 is made with high strength by a steel material having a predetermined thickness. Moreover, as the hollow pile 5, a steel pipe pile and a ready-made concrete pile are used.

  The ejection pipe 2 has an annular shape on the outer peripheral side of the elevating body 1 and is attached to the upper outer periphery of the elevating body 1. A plurality of (for example, 28) injection nozzles 6 are radially arranged in the ejection pipe 2 at predetermined intervals so that the injection ports are directed toward the inner surface of the hollow pile 5. One end of a cleaning fluid supply pipe 7 is connected to a part of the ejection pipe 2, and the other end of the supply pipe 7 is supplied with air and water as cleaning fluid to the ejection pipe 2. An air supply pipe 8 and a water supply pipe 9 are branched and connected. Further, the air supply pipe 8 and the water supply pipe 9 function to pump up air and water in the water storage tank 11a by the air compressor 10 and the pump 11, respectively, and send them to the supply pipe 7.

  One scraper 3 is attached to each end of a plurality of support members 12 projecting radially from the lower outer periphery of the lifting body 1. These support members 12 have substantially the same total length. As shown in FIG. 6, the scraper 3 attached to these support members 12 is constructed by adjoining a plurality of fan-shaped plates 3a having substantially the same form, and the base end portions of these fan-shaped plates 3a are supported by each of them. The member 12 is fixed to the lower surface of the distal end portion. Further, the arcuate tip portions of these fan-shaped plates 3 a have a form and size that face the inner surface of the hollow pile 5 lightly. Therefore, the scraper 3 has a plurality of fan-shaped plates 3 a arranged adjacent to each other, so that the tip ends thereof are connected in a circular shape and pressed against the inner surface of the hollow pile 5 as shown in FIG. 5. Therefore, when the elevating body 1 reciprocates in the hollow pile 5, it is possible to scrape or scrape deposits such as earth and sand and soil cement attached to the inner surface of the hollow pile 5.

The guide wheel 4 is attached to the lower outer periphery of the elevating body 1, and is attached to the tip of a support member 12 disposed at an angular position of 120 degrees, for example. These guide wheels 4 rotate in contact with the inner surface of the hollow pile 5 so that the lifting body 1 can be smoothly guided in the vertical direction along the inner surface of the hollow pile 5. These guide wheels 4 function as spacers for raising and lowering the elevating body 1 with a certain gap at the center in the hollow pile 5, and are therefore injected from the ends of all the injection nozzles 6 of the ejection pipe 2 onto the inner surface of the hollow pile 5. The spray pressure of the cleaning fluid such as air and water can be maintained evenly.
In this embodiment, the guide is shown as a guide wheel 4 that rolls in contact with the inner surface of the hollow pile, but is not limited to this. What is necessary is just the structure which contacts the inner surface of the hollow pile 5, and guides the raising / lowering body 1 so that a fixed space | interval may be maintained with respect to the hollow pile 5 inner surface. Moreover, although the case where the guide wheel 4 as a guide is provided on the lower outer periphery of the lifting body 1 is shown in the present embodiment, this may be the upper outer periphery of the lifting body 1 or both the upper and lower portions. If the guide wheel 4 as a guide exists on the upper outer periphery of the elevating body 1, there is also an effect of preventing the injection nozzle 6 from hitting and damaging the inner surface of the hollow pile 5.

  In addition, a submersible pump 13 is installed inside the elevating body 1, and water (muddy water), which is a cleaning fluid accumulated in the hollow pile 5, is sucked into the bottom of the submersible pump 13 and hollow through the drain pipe 14. A water inlet (not shown) for discharging outside the pile 5 is provided. These water inlets are located sufficiently below the jet pipe 2 and under the condition that the lower part of the lifting body 1 is immersed in the muddy water in the hollow pile 5, the injection of the cleaning fluid from the jet nozzle 6 is not hindered. It is like that. That is, it is possible to avoid jetting the cleaning fluid from the jet nozzle 6 in water (in mud).

  A suspension wire 15 is attached to the outer periphery of the upper end of the lifting body 1, and the suspension wire 15 is locked to the end of a wire rope 17 that is lifted and lowered in the vertical direction from the crane 16. Therefore, the lifting body 1 can be suspended from the crane 16 via the wire rope 17 and the suspension wire 15 to a predetermined depth region in the hollow pile 5 and inserted. When the lifting body 1 is raised or lowered, the air compressor 10 and the pump 11 are operated to supply compressed air from the air compressor 10 to the ejection pipe 2 through the air supply pipe 8 and the supply pipe 7. The water in the water storage tank 11 a is supplied to the ejection pipe 2 through the water supply pipe 9 and the supply pipe 7.

  For this reason, the compressed air and the high-pressure water are jetted from the jet nozzle 6 of the jet pipe 2 toward the inner surface of the hollow pile 5 through the supply pipe 7. For this reason, the deposits on the inner surface of the hollow pile 5 can be washed away. At this time, the annular jet pipe 2 is provided with a large number of jet nozzles 6 at equal intervals. Therefore, the jetted air or water or a mixed fluid of air and water (cleaning fluid) is supplied to the inner surface of the hollow pile 5 ( (Inner peripheral surface) is sprayed evenly. And the inside of the up-and-down direction of the hollow pile 5 preset with the raising / lowering of the raising / lowering body 1 is wash | cleaned one by one even if there is an uneven | corrugated | grooved part in the inner surface in the area | region, and the said deposit | attachment is removed. . Moreover, although the muddy water generated by the removal work of the accumulated matter is accumulated in the region in the hollow pile 5, when the water level (level) becomes higher than the water suction port of the submersible pump 13, the submersible pump 13 The muddy water is discharged out of the hollow pile 5 through the drain pipe 14.

On the other hand, during the lifting operation of the lifting body 1, the tip edge of the scraper 3 provided on the lifting body 1 is pressed against the inner surface of the hollow pile 5, and deposits such as earth and sand and soil cement adhered to the inner surface of the hollow pile 5. Acts to scrape off. For this reason, even if the deposit is sticky, or even if the deposit is firmly adhered, it is forcibly scraped downward. Therefore, the inner surface of the hollow pile 5 is reliably and rapidly cleaned cleanly by the scraping-off process of the deposit by the scraper 3 and the washing-off process of the deposit by water, air, or a mixed medium of water and air (cleaning fluid). It will be.
In particular, since the scraper 3 acts to remove deposits on the inner surface of the hollow pile 5, the cleaning effect is exhibited even if the amount of water (washing water) used is reduced. Cleaning work within the range of the cost is possible.

  In these cases, the distance (gap) between the inner surface of the hollow pile 5 and the tip of the injection nozzle 6 is set to a distance that does not reduce the cleaning ability of the deposit by the cleaning fluid, for example, 30 mm to 200 mm. In the work for removing the deposits on the inner surface of the hollow pile 5, it is desirable that the entire inner surface of the hollow pile 5 can be cleaned at once by the lowering or raising of the lifting body 1, but cleaning is not possible only by one lowering or raising. May be complete. In this case, the lowering and raising of the lifting body 1 may be repeated a plurality of times.

  Moreover, since the guide ring 4 is attached to the lower outer periphery of the raising / lowering body 1, while the clearance gap between the raising / lowering body 1 and the hollow pile 5 inner surface is maintained uniformly in the said area | region, the raising / lowering body 1 is the hollow pile. 5. It can move smoothly along the inner surface. Therefore, the spraying pressure of the cleaning fluid sprayed from the spray nozzle 6 on the inner surface of the hollow pile 5 becomes uniform over a wide range, and the deposits on the inner surface of the hollow pile 5 can be cleaned and removed evenly.

  FIG. 3: shows the deposit removal apparatus of the hollow pile inner surface which shows other embodiment of this invention, (a) is a partial cross section front view of the principal part, (b) is the raising / lowering shown to (a). It is a top view of a body. In this embodiment, instead of the one-stage ejection pipe 2 in the above-described embodiment, an example is shown in which annular ejection pipes 2A and 2B that are installed in two upper and lower stages are used. Here, the supply pipe 7, the air compressor 10, the pump 11 and the suspension wire 15, the crane 16, the wire rope 17, and the like shown in FIG. 1 are omitted, but have the same configuration. The upper and lower two-stage annular jet pipes are composed of an air jet pipe 2A and a water jet pipe 2B, and jet nozzles 6 are provided in the respective jet pipes 2A and 2B toward the inner surface of the hollow pile 5. An air supply pipe 21 is connected to the air ejection pipe 2A, a water supply pipe 22 is connected to the water ejection pipe 2B, air is supplied to the air ejection pipe 2A, and air can be ejected from the ejection nozzle 6. In addition, water is supplied to the water ejection pipe 2B, and water can be ejected from the ejection nozzle 6. The supply of air from the air supply pipe 21 to the air ejection pipe 2A and the supply of water from the water supply pipe 22 to the water ejection pipe 2B can be selectively performed. Reinforcing frames 24 and 25 in which plate members as shown in FIGS. 3 and 4 are assembled in a cross shape are attached to the inner surfaces of the upper and lower ends of the lifting body 1. Others are the same as those of the above-described embodiment, and the same components are denoted by the same reference numerals.

  In the deposit removing device on the inner surface of the hollow pile having such a configuration, the supply of water to the water jet pipe 2B is stopped, the air is supplied to the air jet pipe 2A, and the air is jetted only from the jet nozzle 6 of the air jet pipe 2A. Or by stopping the supply of air to the air ejection pipe 2A, supplying water to the water ejection pipe 2B, and jetting and washing water only from the ejection nozzle 6 of the water ejection pipe 2B. To selectively carry out the cleaning by supplying air and water to the jet pipes 2A and 2B, respectively, and simultaneously jetting air and water from the jet nozzles 6 and 6 of the jet pipes 2A and 2B, respectively. Is possible. Thereby, it will select according to the property of the deposit | attachment adhering to the hollow pile 5 inner surface, and a cleaning operation | work can be implemented, and an deposit | attachment removal operation | work can be implemented efficiently. In particular, since the scraper 3 is present, it is possible to further improve the efficiency of the removal work by selecting the optimum removal efficiency in consideration of its action and effect. Further, in this case, when only air is ejected from the ejection nozzle 6 of the ejection pipe 2A, it is not necessary to install the submersible pump in the lifting body 1, and it is not necessary to operate even if it is installed. In addition, since the scraper 3 acts to remove deposits on the inner surface of the hollow pile 5, the amount of water used can be reduced, and the amount of washing water that accumulates in the hollow pile 5 per unit time can be reduced. Since it can be kept within the range of the cost, drainage is unnecessary and installation of the pump is unnecessary. Even when necessary, the pump can be reduced in size, weight, and drainage time can be shortened.

  FIG. 4 is a partial cross-sectional front view of the main part of the deposit removing device on the inner surface of the hollow pile showing still another embodiment of the present invention. This embodiment is composed of a jet pipe 2b having a plurality of mixed fluid jet nozzles 6a for jetting a mixed fluid of water and air, and water and air are supplied to the mixed fluid jet nozzle 6a, thereby mixing water and air. It is characterized in that fluid is ejected.

  In FIG. 4, an annular jet pipe provided on the outer periphery of the lifting body 1 is composed of a water jet pipe 2b having a plurality of mixed fluid jet nozzles 6a for jetting a mixed fluid of water and air. An annular air passage pipe 2a is provided in parallel, a water supply pipe 22 is connected to the water ejection pipe 2b, an air supply pipe 21 is connected to the air passage pipe 2a, and each mixed fluid of the water ejection pipe 2b A connecting pipe 2c is connected between the injection nozzle 6a and the air passage pipe 2a. Accordingly, the water supplied from the water supply pipe 22 to the water ejection pipe 2b can be jetted from the mixed fluid jet nozzle 6a, and at the same time, the air supplied from the air supply pipe 21 to the air passage pipe 2a also passes through the connecting pipe 2c. It becomes possible to eject from the mixed fluid ejection nozzle 6a, and a mixed fluid of water and air can be ejected from the mixed fluid ejection nozzle 6a. Thereby, the jet force of air is added to the jet force of water, and the jet force of mixed fluid is raised.

Like this structure, it is comprised by the water ejection pipe | tube 2b which has the some mixed fluid injection nozzle 6a which injects the mixed fluid of water and air, and water and air are supplied to this mixed fluid injection nozzle 6a, and water and air of When the mixed fluid is injected, the air injection force is added to the water injection force, the injection force of the mixed fluid is increased, and the synergistic effect of water washing and air washing 5. The ability to remove deposits on the inner surface is increased, and the removal work can be carried out efficiently. Further, the synergistic effect with the scraper 3 enables removal even if the amount of washing water used is small. As a result, the amount of muddy water generated can be kept within the muddy water pool.
Moreover, according to the deposit removal apparatus of the hollow pile inner surface of this Embodiment shown in this FIG. 4, supply of air from the air supply pipe 21 to the air passage pipe 2a is stopped in addition to the above, and the water supply pipe 22 By supplying water to the water jet pipe 2b from the mixed fluid jet nozzle 6a, only water can be jetted, or the water supply from the water supply pipe 22 to the water jet pipe 2b is stopped, By supplying air from the air supply pipe 21 to the air passage pipe 2a, it is possible to inject only air from the mixed fluid injection nozzle 6a. Therefore, in the apparatus for removing deposits on the inner surface of the hollow pile of this embodiment, cleaning is performed by injecting a mixed fluid of water and air from the mixed fluid injection nozzle 6a or by injecting only water from the mixed fluid injection nozzle 6a. In addition, it is possible to selectively carry out the cleaning by jetting only air from the mixed fluid jet nozzle 6a. Thereby, according to the property of the deposit | attachment adhering to the hollow pile 5, the cleaning method can be implemented by selecting an optimal cleaning method, and the deposit removal operation can be performed efficiently. In addition, since the scraper 3 is present, it is possible to further improve the efficiency of the removal work by selecting the optimum removal efficiency in consideration of its action and effect.

  As shown in FIG. 5, the scraper 3 is attached to the tips of the plurality of support members 12 so that the plurality of fan-shaped plates 3a are adjacent to each other. As shown in FIGS. 6A and 6B, these fan-shaped plates 3a are attached with a rubber piece 26 having a knife edge shape at the tip (outer periphery). Further, the support member 12 is inserted into the other base member 12a, in which one cylindrical movable member 12b is fixed to the elevating body 1, so as to be slidable in the axial direction via a spring member (not shown). For this reason, when the lifting body 1 moves up and down in the hollow pile 5, the tip edge of the scraper 3, that is, the tip of the rubber piece 26 on the inner surface of the hollow pile 5 contacts and follows the inner surface (even the uneven surface follows the uneven surface). ), The pressing force of the scraper 3 against the inner surface of the hollow pile 5 is relaxed and absorbed even if the inner surface of the hollow pile has an uneven surface. Therefore, the inner surface of the hollow pile 5 is not damaged by frictional contact with the scraper 3. When the inner surface of the hollow pile 5 is smooth, a scraper 3 as shown in FIGS. 7A and 7B, which is made of a hard material such as a metal material or a synthetic resin material, can also be used. In this case, it is desirable to provide a large notch or hole 27 in the center so that the metal material and the synthetic resin material have elasticity.

  As described above, air can be selectively ejected from the ejection nozzle 6 of the ejection pipe 2A, and water can be selectively ejected from the ejection nozzle 6 of the ejection pipe 2B. Moreover, from the mixed fluid injection nozzle 6a of the water ejection pipe 2b, it is possible to selectively carry out the injection of the mixed fluid of water and air, the injection of only water, or the injection of only air. And by raising / lowering the raising / lowering body 1 in the hollow pile 5 in the injection | spray condition of this air and water, the hollow pile 5 inner surface is obtained by both scraping off of the deposit | attachment by the scraper 3 and washing | cleaning by air or water as mentioned above. Can be cleaned cleanly. In the case of washing with water, washing water (muddy water) after washing accumulates in the hollow pile 5, but this muddy water can be quickly discharged out of the hollow pile 5 by operating the submersible pump 13. . In addition, since the scraper 3 acts to remove the deposits on the inner surface of the hollow pile 5, the cleaning effect can be exhibited even if the amount of water sprayed is reduced, and the amount of generated muddy water is kept within the range of the muddy water pool. Can be eliminated.

Next, the case where the deposit removing method is carried out in the medium excavation method will be described with reference to FIG. FIG. 8 is an explanatory view showing the method for removing the deposit on the inner surface of the hollow pile in the order of steps (a), (b), (c), (d), (e), and (f).
First, FIG. 8 (a) shows a state in which an enlarged root-solidifying portion K is built at the tip of the hollow pile 5. The construction of the root hardening portion K is performed by a conventionally known method. Since the root-solidifying portion K is constructed by mixing the root-solidifying solution R and the ground soil, the root-solidifying solution (or soil cement) R rises in the hollow pile 5 as shown in FIG. 8 (a). To do. Therefore, as shown in FIG. 8B, the bucket 31 is lifted and lowered into the hollow pile 5 with the wire 32, and the root hardening liquid (or soil cement) R is pumped out of the hollow pile 5. In this pumping work, not only the section of the necessary cleaning area T but also the section of the muddy water storage allowance S is added for pumping. This pumping can also be performed using a muddy water pump. As a result, when the root hardening liquid R reaches a predetermined level L that needs to be cleaned (cleaning section T + muddy water accumulation margin S), the pumping operation is finished (FIG. 8C). Next, the elevating body 1 is inserted into the hollow pile 5 by the above-described method, and while the elevating body 1 is lowered or raised, compressed air from the air compressor 10 or high-pressure water from the pump 11 or a mixed fluid thereof is used. It supplies to the ejection pipe 2 or each ejection pipe 2A, 2B, 2a, 2b, it is made to eject from each injection nozzle 6, 6a, and the hollow pile 5 inner surface is wash | cleaned. At the same time, the scraper 3 attached to the outer peripheral side of the lifting body 1 acts so as to scrape the deposits on the inner surface of the hollow pile 5 as the lifting body 1 descends or rises. While being muddy with the air and washing water, it is washed down in the hollow pile 5.

Next, if the cleaning water (muddy water) accumulated in the upper part of the root hardening liquid R at the level L in the hollow pile 5 is accumulated beyond the muddy water accumulation allowance S by the cleaning operation of the adhering matter, The water is sucked by the submersible pump 13 in the body 1 and discharged out of the hollow pile 5. When the washing water (muddy water) falls within the range of the muddy water accumulation margin S, the drainage work is not required (FIGS. 8D and 8E). And after washing | cleaning of the washing | cleaning required area | region (washing area) T, the raising / lowering body 1 is pulled out of the hollow pile 5, and a washing | cleaning operation | work is complete | finished (FIG.8 (e)). Then, after muddy water remaining at level L or higher is pumped out with a bucket or discharged to the outside of the hollow pile 5 by suction with a pump, photographing is performed to check the situation inside the hollow pile 5 after the discharge is finished. The confirmation of the situation in the hollow pile 5 may be visual. After confirming that there is no deposit on the inner surface of the hollow pile 5 by this photographing or visual observation, a series of deposit removal work is completed (FIG. 8 (f)).
FIG. 8 (f) shows a case where the muddy water in the muddy water pool is also drained, but this means that the muddy water in the muddy water pool S is left as it is as shown in FIG. 8 (e). May be.

  As described above, the apparatus for removing deposits on the inner surface of the hollow pile 5 such as the steel pipe pile and the ready-made concrete pile according to the present embodiment places the lifting body 1 in the hollow pile from the upper opening after placing the hollow pile 5 in the ground. 5, and the cleaning fluid is supplied to the annular jet pipes 2, 2 </ b> A, 2 </ b> B, 2 a, 2 b provided in the lifting body 1, and the jets provided in the jet pipes 2, 2 </ b> A, 2 </ b> B, 2 b While the cleaning fluid is jetted from the nozzles 6, 6 a toward the inner surface of the hollow pile 5, the lifting body 1 is lowered and raised, and the tip edge of the scraper 3 protruding from the lifting body 1 is pressed against the inner surface of the hollow pile 5. By this, it is the structure of washing and removing the deposit | attachment of the hollow pile 5 inner surface. As a result, deposits such as earth and sand and soil cement adhered to the inner surface of the hollow pile 5 can be reliably cleaned over the entire inner surface of the hollow pile 5 and the washed deposit and muddy water can be reliably removed to the outside (ground). It can be removed while discharging. When there is little washing water (muddy water) and it falls within the range of the muddy water storage margin S, drainage is not necessary.

The deposit removing device and the deposit removing method for the inner surface of the hollow pile according to the present invention can reliably clean deposits such as earth and sand and soil cement adhered to the inner surface of the hollow pile 5 over the entire inner surface of the hollow portion 5 without unevenness. In addition, the washed pile and muddy water can be removed while reliably discharging to the outside (ground), and the hollow pile inner surface removes deposits such as earth and sand and soil cement from the inner surface of the hollow pile after installation. It is useful for a deposit removing device and a deposit removing method.

DESCRIPTION OF SYMBOLS 1 Lifting body 2, 2A, 2B, 2b Ejection pipe 2a Air passage pipe 2c Connection pipe 3 Scraper 3a Fan-shaped board 4 Guide wheel 5 Hollow pile 6 Injection nozzle 6a Mixed fluid injection nozzle 7 Supply pipe 8 Air supply pipe 9 Water supply pipe 10 Air compressor 11 Pump 12 Support member 12a Base member 12b Movable member 13 Submersible pump 14 Drain pipe 15 Suspension wire 16 Crane 17 Wire rope 21 Air pipe 22 Water pipe 23 Air / water pipe 24, 25 Reinforcement frame 26 Rubber piece 31 Bucket 32 Wire K Enlarged root consolidation part R Root consolidation liquid S Mud pool

Claims (8)

A cylindrical lifting body inserted so as to be able to reciprocate in a hollow pile set in the ground; and
An annular jet pipe attached to the lifting body and having a plurality of jet nozzles at positions facing the inner surface of the hollow pile,
A scraper attached to the elevating body and having a tip edge pressed against the inner surface of the hollow pile when the elevating body is raised and lowered;
A guide attached to the elevating body, and abutting the elevating body against the inner surface of the hollow pile so as to maintain a certain distance from the inner surface of the hollow pile,
When raising and lowering the lifting body in the hollow pile, the cleaning fluid supplied to the ejection pipe is sprayed from the spray nozzle onto the deposit on the inner surface of the hollow pile, and the deposit on the inner surface of the hollow pile is scraped by the scraper. An apparatus for removing deposits on the inner surface of a hollow pile, which is characterized by taking.   The apparatus for removing deposits on the inner surface of a hollow pile according to claim 1, wherein the cleaning fluid is water, air, or a mixed fluid of water and air.   The annular jet pipe is composed of an air jet pipe having a plurality of jet nozzles and a water jet pipe, an air supply pipe is connected to the air jet pipe, a water supply pipe is connected to the water jet pipe, and an air The apparatus for removing deposits on the inner surface of a hollow pile according to claim 1, wherein air can be selectively ejected from an ejection nozzle of the ejection pipe and water can be selectively ejected from an ejection nozzle of the water ejection pipe.   The annular ejection pipe is composed of a water ejection pipe having a plurality of water and air mixed fluid ejection nozzles, and an annular air passage pipe is provided in parallel with the water ejection pipe, and water is supplied to the water ejection pipe. A pipe is connected, an air supply pipe is connected to the air passage pipe, a connection pipe is connected to each of the mixed fluid injection nozzles of the water ejection pipe and the air passage pipe, and a mixed fluid of water and air is 2. The apparatus for removing deposits on the inner surface of a hollow pile according to claim 1, wherein injection is possible.   5. The scraper is supported by a spring and elastically pressed against the inner surface of the hollow pile so as to be able to advance and retract according to the shape of the inner surface of the hollow pile. For removing deposits on the inner surface of hollow piles.   The apparatus for removing deposits on the inner surface of a hollow pile according to any one of claims 1 to 5, wherein at least a tip edge portion of the scraper that contacts the inner surface of the hollow pile is a rubber piece.   The elevating body is provided with a drainage pump, and a water inlet for sucking muddy water in the hollow pile and discharging it outside the hollow pile is provided at a lower level than the jet nozzle of the jet pipe. The deposit removing device for an inner surface of a hollow pile according to any one of claims 1 to 6. It is the deposit removal method of the hollow pile inner surface using the deposit removal apparatus of the hollow pile inner surface in any one of Claims 1 thru | or 7,
After sinking the hollow pile on the ground, the lifting body constituting the deposit removing device is inserted into the hollow pile from the upper opening, and the cleaning fluid is supplied to the annular ejection pipe provided in the lifting body, The elevating body is lowered and raised while injecting a cleaning fluid toward the hollow pile inner surface from an injection nozzle provided in the ejection pipe, and a tip edge of a scraper protruding from the elevator body is disposed on the inner surface of the hollow pile. A method for removing deposits on the inner surface of a hollow pile, wherein the deposits on the inner surface of the hollow pile are washed and removed by pressing against the inner surface of the hollow pile.

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