JP5801930B1 - Grout pressure feeding method using pressure pipe cleaning tool - Google Patents

Abstract

An object of the present invention is to provide a pressure-feed pipe cleaning tool that can substantially completely discharge and clean deposits attached to a pressure-feed pipe, and can be applied to a long-distance pressure feed pipe, and a grout pressure-feed method and a grout cleaning method using the same. provide. SOLUTION: A cylindrical portion 2, 2 ″ is provided, and a pressure-feed tube P is loaded by being loaded so that the peripheral surface of the cylindrical portion 2, 2 ″ is in contact with the pressure-feed tube P, thereby removing deposits in the pressure-feed tube P. In the pressure-feed tube cleaning tool 1, 1 ″ to be cleaned, the ejection holes H1 to H3 penetrating the front end surface 3, 3 ″ and the rear end surface 4, 4 ″ in the pressure-feed direction are formed. Alternatively, the cylindrical portion 2 ′. In the pressure-feed tube cleaning tool 1 ′, which is loaded and pressure-fed so that the peripheral surface of the cylindrical portion 2 ′ is brought into contact with the pressure-feed tube P to remove the deposits in the pressure-feed tube P and is cleaned, On the outer peripheral surface of the columnar portion 2 ′, ejection grooves M1 and M2 are formed to communicate the front end surface 3 ′ and the rear end surface 4 ′ in the pumping direction.

Description

  The present invention relates to a pressure-feed pipe cleaning tool used for injecting and filling a grout between a back surface of a structure such as a tunnel and a ground, a crack in a hard ground, and the like, and a grout using the same The present invention relates to a pressure feeding method and a grout cleaning method.

  Conventionally, the distance from the plant to the point where grout is filled and filled in tunnels (including mountain tunnels) is long, and it seems that the working time (pumpable time) will be exceeded after the work is completed or in grouts such as hardened cement In order to prevent the grout from being hardened in the pumping tube and becoming unusable, the grout remaining in the pumping tube had to be discharged out of the pumping tube and cleaned when the operation was interrupted or finished. .

  In such a case, the grout remaining in the pumping pipe is generally discharged and cleaned by the following two methods using water.

(1) Method of directly discharging / cleaning with the pressure of water This method is a method of directly discharging water remaining in the pumping pipe and discharging remaining grout. However, when discharged directly with water, the pumped water does not push the breathing water in the upper layer of the pumping tube (supernatant liquid that does not contain particles such as cement) and the particles with low specific gravity and density in the middle layer below it. Even if it was possible, particles of large specific gravity and density in the lower layer near the tube bottom could not be swept away. In particular, hardened hydrates adhering to the bottom of the tube lose fluidity and are difficult to discharge only with the pressure of water, and cannot be completely cleaned and some of them remain in the tube bottom. It was supposed to be.

  When such grout pumping and washing with water are repeated, solid matter gradually accumulates on the bottom of the pumping tube, the cross section of the pumping tube is blocked, and finally pumping of the grout becomes difficult. End up. In particular, when the grout is a curable cement system, this phenomenon may cause the pumping pipe to become unusable.

  For this reason, conventionally, when cement milk is injected at a construction site such as a dam, it is not suddenly discharged with water, but the cement concentration (specific gravity) of the cement milk is gradually reduced and finally pumped by washing with water. The inside of the pipe is cleaned.

(2) Method of discharging and cleaning using cleaning ball As described in Non-Patent Document 1, this method passes a spherical cleaning ball made of foamed polyurethane or the like through a pressure feed tube to remove deposits. Is the method. Such a cleaning ball was originally invented in the United States more than 30 years ago as an oil that was pumped from a ship to a tank on the ground through a pumping pipe, and then loaded into the pumping pipe for cleaning. It was diverted to a grout injection pump.

  In this method, the spherical surface of the elastic cleaning ball is loaded in close contact with the inner surface of the pumping tube, and water is pumped after the cleaning ball, so that the cleaning ball and the cleaning ball remain in the tube of the pumping tube with that pressure. Residual grout is discharged and cleaned by flushing out the grout. For this reason, in this method, when the pressure feeding tube extends over a long distance, it may be difficult to discharge and clean with a cleaning ball due to resistance of a hardened grout or the like adhering to the inside of the tube.

  In addition, although it is less than the method of directly discharging with water, even this method cannot completely discharge the solid matter adhering to the bottom of the pumping tube, so while repeating grout pumping and cleaning with a cleaning ball, Similar to the method of directly discharging with water, it was not possible to prevent the solid matter from gradually accumulating in the pipe, and consequently the pipe was blocked and it was not possible to prevent the grout from being pumped.

  In other words, the conventional grout discharging / cleaning method described above cannot completely eliminate the deposits adhering to the bottom of the pressure feeding tube.

Gozaburo Miki, Takao Saito, Kazuo Shimoda, Masayoshi Kimura, "Design and Construction of Backfill Injection Method", Sankai-do, June 1990, P132-P133

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to remove the deposits adhering to the pressure feeding pipe almost completely and to clean the long distance pressure feeding pipe. Another object of the present invention is to provide a pressure-feed pipe cleaning tool that can be applied to the above, a grout pressure-feeding method using the same, and a grout cleaning method.

A grout pumping method according to a first aspect of the present invention is a grout pumping method in which a grout is pumped by using a pumping tube. The grout pumping method includes a columnar portion, and is loaded and pumped so that the circumferential surface of the columnar portion comes into contact with the pumping tube. This is a pressure-feed tube cleaning tool that removes and cleans deposits in the pressure-feed tube, and is formed with an ejection hole penetrating the front end surface and the rear end surface in the pressure feed direction, or the outer peripheral surface of the columnar portion In addition, the grout is pumped by using a pumping tube cleaning tool in which an ejection groove that communicates the front end surface and the rear end surface in the pumping direction is formed .

The grout pumping method according to the second invention, in the first invention, in the case of continuing to pump the grout left in the pumping pipe after interrupting the pumping of the grout for at least a predetermined time while leaving the grout in the pumping pipe. The pressure feeding pipe cleaning tool is loaded in the pressure feeding pipe, and the grout having high fluidity behind the pressure feeding pipe cleaning tool is left in the front of the left pressure feeding pipe cleaning tool by the pressure at the time of grout pressure feeding. It is characterized by pumping the grout material by stirring it toward

According to the first and second inventions, the grout in front of the pressure-feed tube cleaning tool is pumped with stirring at the injection pressure of the grout using the pressure at the time of pressure feed, so that the grout can be prevented from being clogged in the pressure-feed tube. . For this reason, even if the grout is left in the pumping tube for a long time and then the grout pumping is resumed, or when pumping with long-distance piping, the grout is pumped without clogging the grout in the middle of the pumping tube. It becomes possible.

It is a schematic diagram which shows notionally the separation state of the grout under the state which is still or close to still. It is a side view which shows the pumping pipe cleaning tool which concerns on 1st Embodiment of this invention. It is the front view which looked at the same pressure feeding pipe cleaning tool from the front. It is a side view which shows the pumping pipe cleaning tool which concerns on 2nd Embodiment of this invention. It is the front view which looked at the same pressure feeding pipe cleaning tool from the front. It is a side view which shows the pumping pipe cleaning tool which concerns on 3rd Embodiment of this invention. It is the front view which looked at the same pressure feeding pipe cleaning tool from the front. It is a partial vertical sectional view of a pressure feeding pipe showing a state where a cement grout that remains and is separated using the pressure feeding pipe cleaning tool is discharged.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a pressure feeding tube cleaning tool according to the present invention, a grout pressure feeding method using the same, and a mode for carrying out a grout cleaning method will be described in detail with reference to the drawings.

  First, the grout pumped by the pumping tube cleaned with the pumping tube cleaning tool according to the present invention will be described. Grout fills cracks and cavities by injecting and filling cracks (including backfills) between mountain tunnels and dams in hard ground, or between the back and ground of structures, and hardening. Used for purposes. For this reason, a certain strength is required for the grout, and generally a particle-hardening grout such as cement or slag-lime (hereinafter referred to as cement grout) is used.

  As grout components, the one used for cracking dams is cement milk, and the one used for filling cavities is the addition of adhesives (thickeners) such as bentonite to cement milk for breathing and materials. It is intended to prevent separation (particle sedimentation). However, since grout is also required to have pumpability (fluidity), such a phenomenon cannot be completely eliminated.

  Ordinary Portland cement, which is most frequently used as a component of cement grout, is composed of particles having a wide particle size distribution with a maximum particle size of 100 μm, a minimum particle size of 3 μm, and an average particle size of 23 μm. Since particles having such a particle size distribution are the main components, it is difficult for cementitious grout to avoid phenomena such as breathing and material separation (a phenomenon of particle sedimentation) as described above.

  These phenomena are unlikely to occur if the grout flow rate in the pressure feed tube is above a certain level, but are likely to occur if the flow rate is slow. Even during grouting, the above-mentioned phenomenon occurs because the grouting flow rate becomes slow depending on the viscosity of the grouting, the diameter of the feeding tube, and the discharge amount. Also, when pumping is interrupted due to work conditions such as replacement of injection holes, or when pumping is interrupted due to problems with the injection device (injection plant and injection equipment at the tip of the pumping pipe), joints of the pumping pipe, etc. For example, when the grout is in a stationary state, the above phenomenon becomes remarkable.

  For example, as shown in FIG. 1, when the grout G in the pressure feeding pipe P is in a stationary or almost stationary state, it is separated into three layers of a lower layer A, an intermediate layer B, and an upper layer C. In the lower layer A of the pressure feeding pipe P, a layer having a large particle and density and low fluidity is formed in order from the grout component in descending order of particle size. In particular, particles and components having a large density settle and adhere to the vicinity of the tube bottom. As a matter of course, a component having a large specific gravity settles down even if the particles have the same size.

  In particular, in the lower layer A, the larger the amount of particles constituting the grout G, the larger the amount deposited. Further, the deposition thickness of the lower layer A is not uniform, and becomes thicker as there are more irregularities in the pipe, and the joint portion becomes thicker than the general portion. That is, even in the pressure feeding pipe P, the amount of deposition of the lower layer A locally increases in the portion where the resistance to the grout flow is large.

  On the lower layer A, an intermediate layer B composed of components having relatively small particles and low density is formed. The middle layer B has small particles and a small thickness, but tends to be thick when an adhesive (thickener) is added to the grout. Of course, the middle layer B has smaller particles and smaller density, and therefore has better fluidity than the lower layer A.

  On the middle layer B, an upper layer C made of breathing water (supernatant liquid not containing particles such as cement: free water) is formed. In the simple cement milk used as grouting for dams, the breathing water after 1 hour in the range of water-cement ratio (W / C) 1 to 3 is very large as 15 to 70%, while for cavity filling In grout, when adjusting viscosity by adding an adhesive such as bentonite in addition to ordinary Portland cement, the breathing water after 1 hour is about 3 to 15%.

[First Embodiment]
Next, with reference to FIG. 2 and FIG. 3, a pressure feeding tube cleaning tool according to the first embodiment which is an embodiment of the present invention will be described. The pressure-feed tube cleaning tool 1 according to the first embodiment is a cylindrical object made of a synthetic resin such as rubber or foamed polyurethane. The pressure-feed tube P is loaded into the pressure-feed tube P and is moved by being pumped. It has a function of cleaning out the inside of the pressure feeding pipe P by flushing out deposits such as hardened grout adhering to the inner surface and discharging it out of the pipe.

  In this pressure-feed tube cleaning tool 1, a portion that is loaded on the pressure-feed tube P and abuts against the inner surface of the pressure-feed tube P is a cylindrical portion 2, and a circular plane at the tip of the cylindrical portion 2 in the pressure-feed direction is formed. The front end surface 3 and a circular flat surface at the rear end in the pumping direction are rear end surfaces 4.

  The cylindrical portion 2 is formed with one ejection hole H1 that penetrates the front end surface 3 and the rear end surface 4. The jet hole H1 is a hole having a circular cross section that extends linearly, and communicates the rear side in the pumping direction of the cylindrical portion 2 with high pressure and the front side in the pumping direction with low pressure at the time of pumping. The grout and water behind the tool 1 are ejected toward the front deposit, and the deposit is stirred and fluidized.

  According to such a pressure-feed pipe cleaning tool 1 according to the first embodiment, the water or grout behind the pressure-feed pipe cleaning tool 1 having high pressure and high fluidity is ejected from the ejection hole H1, whereby the pressure-feed pipe cleaning tool. The high-viscosity component that has settled by mixing water or grout with the adhering substance in front of 1 can be homogenized and pushed out by the pressure-pipe cleaning tool 1 while improving fluidity. For this reason, the deposit | attachment adhering to the pressure feeding pipe P can be discharged | emitted completely and can be cleaned, and it can apply also to a long distance pressure feeding pipe.

[Second Embodiment]
Next, with reference to FIGS. 4 and 5, a pressure-feed tube cleaning tool according to a second embodiment of the present invention will be described. A pressure-feed tube cleaning tool 1 ′ according to the second embodiment includes a columnar portion 2 ′ that is loaded on the pressure-feed tube P and abuts against the inner surface of the pressure-feed tube P, and a hemisphere formed in front of the columnar portion 2 ′. This is a bullet-like (rocket-like) object made of a synthetic resin such as rubber or foamed polyurethane. Similarly to the pressure feed tube cleaning tool 1, the pressure feed tube cleaning tool 1 ′ is attached to the pressure feed pipe P, and is attached to the inner surface of the pressure feed pipe P by being fed and pumped. Is discharged to the outside of the pipe, and the inside of the pressure feed pipe P is cleaned.

  In this pressure-feed tube cleaning tool 1 ′, the front surface of the tip portion 5 ′ is a tip surface 3 ′ made of a hemispherically curved surface convex forward in the pressure-feed direction, and the rear surface of the columnar portion 2 ′ is a circular plane. It becomes the rear end face 4 ′.

  In addition, two ejection grooves M1 and M2 that are rotationally symmetric with respect to the central axis are formed on the surfaces of the columnar portion 2 ′ and the front end portion 5 ′ that reach the vicinity of the center of the front end surface 3 ′ from the rear end surface 4 ′. Has been. These ejection grooves M1 and M2 are grooves having a semicircular cross section extending spirally along the outer periphery of the cylinder, and, like the ejection holes H1, the rear side in the pumping direction of the cylindrical part 2 ′ having a high pressure during pumping. By communicating with the front in the pumping direction of the tip portion 5 ′ having a low pressure, the grout and water behind the pumping pipe cleaning tool 1 ′ are ejected toward the front deposit, and the deposit is stirred and fluidized. It has a function.

  According to such a pressure feed tube cleaning tool 1 ′ according to the second embodiment, by ejecting water or grout behind the pressure feed pipe cleaning tool 1 ′ having high pressure and high fluidity from the ejection grooves M1 and M2, The high-viscosity component that has settled by mixing water or grout with the adhering substance in front of the pressure-pipe cleaning tool 1 ′ can be made uniform and pushed out by the pressure-pipe cleaning tool 1 ′ while improving fluidity. For this reason, the deposit | attachment adhering to the pressure feeding pipe P can be discharged | emitted completely and can be cleaned, and it can apply also to a long distance pressure feeding pipe.

  In addition, according to the pressure feeding tube cleaning tool 1 ′, the two ejection grooves M1 and M2 that are point-symmetric are formed, so that either one of the ejection grooves extends from the upper end of the rear end surface 4 ′ to the front end surface. The probability of being located so as to communicate with the lower part of 3 ′ is high, and the grout component of the lower layer A (see FIG. 1) that has settled in front of the pressure-feed pipe cleaning tool 1 ′ can be efficiently stirred.

[Third Embodiment]
Next, with reference to FIGS. 6 and 7, a pressure feeding tube cleaning tool according to a third embodiment of the present invention will be described. The pressure-feed tube cleaning tool 1 ″ according to the third embodiment is similar to the pressure-feed tube cleaning tool 1 ′ in that a cylindrical portion 2 ″ that is loaded into the pressure-feed tube P and abuts against the inner surface of the pressure-feed tube P, and this columnar portion. It is a bullet-like (rocket-shaped) object made of synthetic resin such as rubber or foamed polyurethane, which is composed of a hemispherical tip 5 ″ formed in front of 2 ″. Also, the pressure feed tube cleaning tool 1 ″ is attached to the pressure feed tube P, and is attached to the inner surface of the pressure feed tube P by adhering to the inner surface of the pressure feed tube P in the same manner as the pressure feed tube cleaning tool 1. Is discharged to the outside of the pipe, and the inside of the pressure feed pipe P is cleaned.

  In this pressure feeding tube cleaning tool 1 ″, the front surface of the tip portion 5 ″ is a tip surface 3 ″ made of a hemispherically curved surface convex forward in the pressure feeding direction, like the pressure feeding tube cleaning tool 1 ′. “The rear surface is a rear end surface 4 formed of a circular plane”.

  In addition, the cylindrical portion 2 ″ and the tip portion 5 ″ are formed with two ejection holes H2 and H3 that are rotationally symmetrical with respect to each other on the central axis, reaching from the rear end surface 4 ″ to the vicinity of the center of the tip surface 3 ″. Yes. These ejection holes H2 and H3 are circular holes that are gently curved so as not to cross each other. Like the ejection hole H1, the cylindrical portion 2 ″ having a high pressure at the time of pumping and the rear side in the pumping direction, By communicating with the front of the lower tip portion 5 ″ in the pumping direction, the grout and water behind the pumping tube cleaning tool 1 ″ are ejected toward the front deposit, and the deposit is stirred and fluidized. doing.

  According to such a pressure feed tube cleaning tool 1 ″ according to the third embodiment, by ejecting water or grout behind the pressure feed tube cleaning tool 1 ″ having high pressure and high fluidity from the ejection holes H2 and H3, The high-viscosity component that has settled by mixing water or grout with the adhering substance in front of the pressure-feed tube cleaning tool 1 ″ can be made uniform and pushed out with the pressure-feed tube cleaning tool 1 ″ while improving fluidity. For this reason, the deposit | attachment adhering to the pressure feeding pipe P can be discharged | emitted completely and can be cleaned, and it can apply also to a long distance pressure feeding pipe.

  Moreover, according to the pressure feeding tube cleaning tool 1 ″, since the two injection holes H2 and H3 that are point-symmetric are formed as in the pressure feeding tube cleaning tool 1 ′, any one of the ejection holes is not provided. It is highly probable that it is located so as to communicate from the upper end of the rear end face 4 ″ to the lower end of the front end face 3 ″, and the grout component of the lower layer A (see FIG. 1) that has settled in front of the pressure-feed pipe cleaning tool 1 ″ is efficient. Stir well.

  As described above, the pressure-feed tube cleaning tools 1-1 ″ according to the first to third embodiments of the present invention have been described. However, the material constituting the pressure-feed tube cleaning tools 1-1 ″ is rubber or a synthetic resin. It does not matter whether it is hard or soft. However, when irregularities such as ridges are formed on the inner wall of the pumping pipe, or when pipes such as cheese pipes and elbow pipes are connected at right angles, at least the surface of the cylindrical part or the tip part is foamed. It is preferably made of a stretchable elastic material such as polyurethane. This is because, due to the elasticity, not only the deposits can be washed away even if there are irregularities, but also the perpendicular direction can be changed smoothly. Note that a wire for cleaning the inner wall of the pressure feeding tube may be charged so as to be buried in a synthetic resin or the like constituting the cylindrical portion 2-2 ″ or the tip portion 5 ′, 5 ″.

  Further, the number and shape of the ejection holes and ejection grooves are appropriately determined and are not limited to the illustrated form. In particular, the total cross-sectional area of the ejection holes and ejection grooves is the properties of the water and grout being pumped (for example, the presence / absence of particles, viscosity, specific gravity, and other properties specific to grout), the diameter and length of the pumping tube, and the pumping amount. (Flow rate), the shape and structure of the cylindrical portion, the properties of the remaining grout, etc. may be appropriately determined in a comprehensive manner. In addition, as for the pressure feeding pipe, a pipe having a diameter of 1 inch or 2 inches is used as long as it is a general pumping distance (pressure of about 30 to 300 L / min) and a general pumping distance or pressure.

[Usage of pressure pipe cleaning tool]
Next, with reference to FIG. 8, a method of using the pressure feeding tube cleaning tool according to the embodiment of the present invention will be described. In addition, the case where the above-mentioned pressure feed pipe cleaning tool 1 ″ is loaded into the pressure feed pipe P and moved to discharge the cement-type grout (particle-type grout) remaining in the pressure feed pipe P will be described.

  First, the pressure-feed tube cleaning tool 1 ″ is inserted and loaded into the pressure-feed tube P. At this time, the pressure-feed tube cleaning tool 1 ″ having a cylindrical portion 2 ″ having a diameter that is the same as or slightly smaller than the inner diameter of the pressure-feed tube P. However, as will be described later, when the cylindrical portion 2 ″ is made of an elastic body having elasticity, the pressure feeding tube cleaning tool having the cylindrical portion 2 ″ having a diameter slightly larger than the inner diameter of the pressure feeding tube P. 1 ″ may be selected. Note that the insertion of the pressure feed pipe cleaning tool into the pressure feed pipe P is sucked and loaded only by being introduced into the inlet of the pressure feed pump.

  Then, in a state where the pressure feeding tube cleaning tool 1 ″ is loaded in the pressure feeding tube P, a pressure feeding pump (not shown) is operated, and water or grout is pressure-fed from behind the pressure feeding tube cleaning tool 1 ″ so that the pressure feeding tube cleaning tool 1 ″ is The cylindrical portion 2 ″ is moved so as to be in sliding contact with the inner surface of the pressure feeding tube P.

  Then, a part of water or grout pumped from the ejection holes H2 and H3 is ejected by the pressure difference between the rear and the front with the pressure feeding tube cleaning tool 1 ″ as a boundary. At this time, as shown in FIG. In addition, even when the grout G is separated into three layers of the lower layer A, the middle layer B, and the upper layer C in the tube of the pressure feeding pipe P due to a stationary state for a long time, the separated grout G is caused by the spouted water or the momentum of the grout. The pressure feeding tube cleaning tool can be collected by attaching a collecting device such as a spear to the tip of the pressure feeding tube P.

  In this way, the separated and settled grout can be swept away with the pressure feeding tube cleaning tool 1 "while re-stirring, so that the entire area of the pressure feeding tube P is discharged and cleaned almost completely without leaving any deposits. In addition, since the pressure-feed tube cleaning tool 1 ″ moves inside the pressure-feed tube P while stirring the grout component separated and settled in front, it can be applied to a long-distance pressure-feed tube with little resistance.

  Further, not only cement-type grout but also bentonite or polymer-based adhesive that does not contain particulate components adheres to the inner wall of the pressure-feed pipe P, the ejection from the ejection holes H2 and H3 (pressure injection) ), The attached adhesive or the like can be easily peeled off and discharged. The main component of bentonite powder is montmorillonite clay mineral, and since it is a natural mineral, it contains a small amount of sand and, strictly speaking, settles as particles. The explanation was made separately from the system grout.

[Grout pumping method]
Next, a grout pumping method using the pump tube cleaning tool according to the embodiment of the present invention will be described. The grout pumping method using the pumping tube cleaning tool according to the embodiment is the same as the method of using the pumping tube cleaning tool described above, and thus detailed description thereof will be omitted, but the first to third embodiments described above are omitted. When such a pressure-feed pipe cleaning tool 1-1 ”is applied to grout pressure feed, in the conventional grout pressure feed method, the grout remaining in the pressure feed pipe must be discharged out of the pressure feed pipe and cleaned when the work is interrupted or finished. It is extremely useful in that it can be resumed without draining grout.

  That is, when injecting non-hardening grout into a cavity or the like, or injecting hardenable grout, for example, when restarting after injection filling with grout capable of being pumped without hardening for more than one day, or at the time of injection When the injection is interrupted for some reason, the grout pumping can be resumed by using the pumping tube cleaners 1 to 1 '' at the next work while leaving the grout in the pumping tube. This is because the grout left behind and separated can be pumped while re-stirring by injecting new grout from the ejection hole or the like.

  Moreover, even if it is a case where grout pressure feeding is possible without interruption, if grout pressure feeding is performed using the pressure pipe cleaning tool 1-1 ”, the inside of the pressure feeding pipe can be cleaned at the same time as the grout pressure feeding. This eliminates the need for cleaning or the like and is maintenance-free.

  In short, according to the grout pressure feeding method using the pressure feeding tube cleaning tool according to the embodiment of the present invention, the grout in front of the pressure feeding tube cleaning tool is pumped while stirring with the grouting jet pressure using the pressure at the time of pressure feeding. The grout can be prevented from clogging in the pumping tube. For this reason, even if the grout is left in the pumping tube for a long time and then the grout pumping is resumed, or when pumping with long-distance piping, the grout is pumped without clogging the grout in the middle of the pumping tube. It becomes possible.

[How to clean grout]
Next, the grout cleaning method using the pressure feeding tube cleaning tool according to the embodiment of the present invention will be described. The grout cleaning method using the pressure-feed tube cleaning tool according to the embodiment is the same as the above-described method of using the pressure-feed tube cleaning tool, and thus detailed description thereof is omitted.

  After the filling and filling of the grout, or when the curable grout is interrupted for some reason at the time of injection and there is a possibility that the hardening may proceed and the pumping becomes impossible, the pumping tube cleaning tool 1-1 ”is inserted into the pumping tube. The remaining curable grout is re-stirred and discharged to clean the inside of the pressure feed pipe, and the pressure feed pipe cleaning tool is loaded into the feed port of the pressure feed pump. The pumping tube cleaning tool is collected by attaching a collecting device such as a spear to the tip of the pumping tube.

  According to the grout cleaning method using the pressure feeding tube cleaning tool according to the embodiment of the present invention, the pressure feeding tube cleaning is performed while stirring the curable grout in front of the pressure feeding tube cleaning tool with the jet pressure of water using the pressure at the time of pressure feeding. Since it is extruded and cleaned with a tool, it is possible to discharge and clean it by mixing the settled cement components evenly to increase fluidity. For this reason, even if the grout is left in the pumping pipe for a long time and then cleaned, or after cleaning the grout in the long-distance piping, the deposits in the pumping pipe are almost completely discharged and cleaned. be able to.

  As mentioned above, all of the above-described embodiments are merely specific embodiments for carrying out the present invention, and the technical scope of the present invention should not be limitedly interpreted by these embodiments. It is.

P: Pressure feeding tube A: Lower layer B: Middle layer C: Upper layer G: Grout 1, 1 ', 1 ": Pressure feeding tube cleaning tool 2, 2', 2": Cylindrical part 3, 3 ', 3 ": Tip surface 4 4 ′, 4 ″: rear end surface 5 ′, 5 ″: tip portions H1, H2, H3: ejection holes M1, M2: ejection grooves

Claims (2)

In the grout pumping method in which the grout is pumped using a pumping tube,
A pressure-feed tube cleaning tool comprising a columnar portion, which is loaded so that the circumferential surface of the column-shaped portion comes into contact with the pressure-feed tube and is pumped to remove deposits in the pressure-feed tube and cleans it. A jet pipe cleaning tool in which a jet hole penetrating the front end face and the rear end face is formed, or a jet groove that communicates the front end face and the rear end face in the pressure feed direction is formed on the outer peripheral surface of the cylindrical portion. A grout pumping method characterized in that the grout is pumped using When the grout is left in the pumping tube for at least a predetermined period of time and the grout left in the pumping tube is continuously pumped, the cleaning device is loaded in the pumping tube when the grout left in the pumping tube is continuously pumped. The grouting material is pumped while stirring the grouting material by spouting the high fluidity grout behind the pumping tube cleaning tool toward the grout in front of the left pumping tube cleaning tool by the pressure at the time of pumping. The grout pumping method according to claim 1 , wherein:

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