JP2011122408A - Jetting apparatus for supplying liquid or fluid solidifying material, steel pile using the same, construction method of steel pile, and foundation pile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steel pipe pile, an apparatus used for the steel pipe pile, a construction method of the steel pipe pile, and a foundation pile. <P>SOLUTION: The steel pipe pile 1 is formed by arranging and fixing a metal outer pipe 7 having jet holes 6 in the tip part and a circumferential sidewall, in a pile axis direction on the outside of a steel pipe pile body 2, fitting a tubular valve element 8 for supplying liquid, slidably to the inside of the metal outer pipe 7, and providing the tip part and the peripheral sidewall of the tubular valve element 8 for supplying liquid, with holes for connection to the inlet 5a side of the jet holes, and a wall part for blocking the inlet side of the jet holes. The jetting apparatus 22 for supplying a fluid solidifying material includes the metal outer pipe 7 and the tubular valve element 8 for supplying liquid. The steel pipe pile 1 is used to jet water or a material cured with time such as cement milk from the jet holes in the tip part of the metal outer pipe 7 and to jet the material cured with time from jet holes in the side wall to construct the steel pipe pile 1 and to construct the foundation pile. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention forms a solidified portion and an adhesion layer by injecting a fluidized solidifying material such as cement milk into the tip and peripheral surface of the steel pile in order to increase the pile bearing capacity when placing the steel pile. TECHNICAL FIELD The present invention relates to an injection device for supplying liquid or fluidized solidifying material, a steel pile using the same, a method for constructing a steel pile, and a foundation pile.

  In the construction of steel pipe piles, a construction method is generally used in which the vibration is applied to the steel pipe piles using a vibro hammer to reduce the resistance of the ground while the ground is placed in the ground. There is a method to use together.

  As shown in FIG. 19, the construction method of the steel pipe pile which uses a water jet in addition to the vibration by the vibro hammer 35 has a plurality of injection nozzles arranged at the tip of the steel pipe pile 36, and a rubber hose 37 is connected to each injection nozzle. In this method, the ground is excavated by spraying high-pressure water from the spray nozzle to reduce the driving resistance of the pile. In general, the water jet is jetted downward only from the tip of the steel pipe pile.

However, in the construction method using water jet together, since the cavity is generated in the ground below the steel pipe pile and the clogging of the steel pipe pile tip is insufficient, the tip bearing capacity is increased after the construction of the steel pipe pile. It cannot be secured.
Therefore, there is a method for constructing a solidified portion at the tip of the pile by injecting the fluidized solidifying material from the injection nozzle after constructing the steel pipe pile to the predetermined support layer while injecting high-pressure water using the injection nozzle. It is known (see, for example, Patent Document 1).

Moreover, it is also known that a large solidified part can be built by setting the injection direction of the high-pressure water of the injection nozzle to the pile driving direction and the direction perpendicular to the driving direction (see, for example, Patent Document 1).
In the conventional case, a rubber hose is used to inject cement milk. However, since the rubber hose is flexible, it can be recovered when the driving length of the steel pipe pile is less than about 15 m. Thus, the cement milk can be poured into the peripheral surface while collecting the hose after the steel pipe pile is laid.

  When a rubber hose is used to spray cement milk, the resistance from the ground surface (tightening by earth pressure) increases as the steel pipe pile driving depth increases, and the rubber hose increases. It becomes difficult to collect the hose. In addition, the risk of the rubber hose breaking during the steel pipe pile driving process is increased. When the driving length of the steel pipe pile exceeds 20 m to 30 m, it is practically impossible to use a rubber hose, although it depends on the ground conditions.

In addition, the high pressure water supply hose for high pressure injection attached to the steel pipe pile as ground excavation assistance has a high pressure injection nozzle attached to the tip, but when attaching the high pressure injection nozzle to the nozzle holder welded to the steel pipe pile It is also known to fix with a component called a tension element (see, for example, Patent Document 2).
The tension element prevents the high-pressure spray nozzle from being removed when placing, and conversely, when the high-pressure water supply hose is collected, the tension element is torn off and easily removed when a predetermined tensile force is applied. In this case, however, the deeper the steel pipe pile is, the more difficult it becomes. That is, while the steel pipe pile is in the process of being driven, the tension element cuts (breaks) beyond the load capacity, or the high pressure water supply hose from the ground is too tight, causing a tensile force to act on the high pressure water supply hose from the ground. However, the tensile force may not reach the tension element.

Similar to the above device, as a device for easily fixing and removing the jet nozzle from the pile, the high pressure injection nozzle is inserted into the nozzle holder, fixed with a part called shear pin, and fixed when collecting the high pressure water supply hose. A technique is also known in which a shear pin is broken when a tensile force greater than the force is applied, and the high-pressure spray nozzle can be easily detached from the nozzle holder (see, for example, Patent Document 3).
However, in this case as well, if the pile driving depth becomes deeper, the shear pin breaks in the middle of placement, or the tensile force does not reach the tip of the high-pressure water supply hose when the high-pressure water supply hose is collected, and the shear pin cannot be broken. There is a risk that the water supply hose may become uncollectable.

JP 2004-270157 A JP 2007-46432 A Japanese Patent Application Laid-Open No. 08-92955

In the conventional case, as a problem at the time of placing, (1) the tension element may be cut during placement, (2) the high pressure water supply hose may be damaged, or in the worst case, the high pressure water supply hose may be broken. there were.
Further, as a problem at the time of collecting the high-pressure water supply hose, when the penetration depth of the pile becomes deep, there is a possibility that even if the high-pressure water supply hose is pulled, the tension element is not cut and the high-pressure water supply hose is cut.
By eliminating these issues, it is possible to switch from the pile tip injection of the cement milk to the pile peripheral surface injection while preventing the pipes for water and cement milk delivery during the placement from being damaged, and efficiently Pile can be constructed and foundation pile can be built.
An object of this invention is to provide the construction method and foundation pile of the injection apparatus for the liquid or fluidity solidification material supply which eliminated the said subject advantageously, the steel pile using the same, and a steel pipe pile.

The injection device for supplying a liquid or fluidized solidifying material according to the first aspect of the invention is an injection device for supplying a liquid or fluidized solidifying material, and is made of a metal outer member provided with injection holes in the tip portion and the circumferential side wall, respectively. A liquid supply tubular valve body is slidably fitted inside the pipe, and connected to the injection hole of the metal outer pipe at the distal end portion and the circumferential side wall of the liquid supply tubular valve body. And a wall portion for closing the inlet connected to the injection hole of the metal outer tube.
In the second invention, in the injection device for supplying a liquid or fluidized solidifying material of the first invention, the injection hole in the distal end portion of the metal outer tube communicates with the hole in the distal end portion of the tubular valve body for supplying liquid. So that the injection hole in the side wall of the metal outer tube and the hole in the side wall of the tubular valve body for liquid supply do not communicate with each other. The hole of the side wall is characterized by being shifted in position.
In the third invention, when the injection hole of the metal outer tube tip of the first invention communicates with the hole of the tip of the liquid supply tubular valve body, the injection hole of the metal outer tube side wall, In order not to communicate with the hole in the side wall of the tubular valve body for liquid supply, the position of the injection hole in the side wall in the outer tube made of the metal and the hole in the side wall in the tubular valve body for liquid supply are shifted in the vertical direction. And when the injection hole on the side wall of the metal outer pipe communicates with the hole on the side wall of the tubular valve body for liquid supply, the injection hole on the tip of the metal outer pipe and the pipe for liquid supply The injection hole at the tip of the metal outer tube and the hole at the tip of the tubular valve body for liquid supply are shifted in the radial direction of the pipe so that the hole at the tip of the valve body does not communicate with each other. It is characterized by being.
According to a fourth aspect of the invention, in the injection device for supplying a liquid or fluidized solidifying material of the first aspect, the injection hole at the tip of the metal outer tube communicates with the hole at the tip of the tubular valve body for supplying liquid. So that the injection hole on the side wall of the metal outer tube and the hole on the side wall of the tubular valve body for liquid supply do not communicate with each other. The side wall hole is displaced in the circumferential direction of the pipe, and when the injection hole in the side wall of the metal outer pipe communicates with the hole in the side wall of the tubular valve body for supplying liquid, the tip of the metal outer pipe The injection hole in the metal outer tube and the hole in the tip of the liquid supply tubular valve body so that the injection hole in the portion does not communicate with the hole in the tip of the liquid supply tubular valve body. Is characterized in that the position is shifted in the pipe circumferential direction.
In 5th invention, the metal outer pipe | tube in the injection apparatus for liquid or fluid solidification material supply of any one or several 1st invention-4th invention is arrange | positioned in the pile longitudinal direction on the outer side of the steel pile main body. It is characterized by being fixed.
In the sixth invention, in the steel pile according to any one of the first, second, and third inventions, the liquid or fluidized solidifying material supply according to any one of claims 1 to 3 is provided outside the steel pile main body. The metal outer tube in the injection device for use is arranged and fixed in the longitudinal direction of the pile, and the injection hole is provided in the side wall of the metal outer tube at intervals in the vertical direction. In the side wall, holes for connecting to the injection holes are provided at intervals in the vertical direction at the same intervals as the intervals at which the injection holes are provided. The valve body is characterized in that it can move in the vertical direction and cannot rotate in the circumferential direction.
In the seventh invention, in the steel pile of any one of the first, second, and fourth inventions, injection holes are provided in the side wall of the metal outer pipe at intervals in the circumferential direction, and the tubular valve body for liquid supply is provided. In the side wall, holes for connecting to the injection holes are provided at intervals in the circumferential direction at the same intervals as the intervals at which the injection holes are provided. The valve body is rotatable in the circumferential direction and cannot be moved in the vertical direction. When the side wall injection hole of the metal outer pipe and the hole of the tubular valve body communicate with each other, the tip end injection hole of the metal outer pipe is blocked. When the side wall injection hole of the metal outer tube and the hole of the tubular valve body do not communicate with each other, the tip end injection hole of the metal outer tube is opened.
In the steel pile of the eighth invention, the steel pile main body is either a steel pipe, H-shaped steel or steel sheet pile.
In the construction method of the steel pipe pile according to the ninth aspect of the invention, in the placing of the steel pipe pile, the steel pile construction method of injecting high-pressure water in the steel pile penetration direction, the steel pile according to any one of claims 5 to 8 Used, supplying high-pressure water into the tubular valve body for supplying liquid, injecting high-pressure water from the tip of the pile, penetrating the steel pile to a predetermined depth, and instead of injecting the high-pressure water, the tubular valve body The fluidized solidification material is supplied to the pile, the fluidized solidification material is sprayed from the tip of the pile, the root is formed at the tip of the steel pile, the hole in the side wall of the tubular valve body for liquid supply, and the metal A vertical hole formed on the outer peripheral surface of the steel pile and the ground around the steel pile by injecting the fluidized solidifying material from the injection hole on the side wall of the metal outer pipe by communicating the injection holes on the side wall of the outer pipe A fluidized solidifying material is injected between the steel piles to form an adhesion layer on the steel pile side peripheral surface side.
The foundation pile according to the seventh invention is characterized in that the steel pile is supported by the rooting portion and the adhesion layer which are constructed by the construction method of the steel pile according to the sixth invention and the fluidized solidified material is solidified.

According to the injection device for supplying the liquid or fluidized solidifying material of the first invention, the liquid supply tubular valve body slides inside the metal outer tube provided with the injection hole at the tip and the circumferential side wall, respectively. A hole for connecting to the metal outer pipe injection hole and the metal outer pipe injection hole are closed at the distal end portion and the circumferential side wall of the tubular valve body for liquid supply. Therefore, the injection device has a simple double-tube structure including a metal outer tube and a tubular valve body, and the injection hole on the tip or side wall of the metal outer tube. The effect that it can be made to inject from is obtained.
According to the injection device for supplying a liquid or fluidized solidifying material of the second invention, when the injection hole at the tip portion of the metal outer tube and the hole at the tip portion of the tubular valve body for liquid supply are communicated, The injection hole in the metal outer tube tip and the hole in the tip of the liquid supply tubular valve body are arranged so that the injection hole in the side wall of the outer tube does not communicate with the hole in the side wall of the tubular valve body for liquid supply. And the injection hole on the side wall in the metal outer pipe, the tip of the tubular valve body for supplying liquid, and the hole in the side wall are shifted in position, so that from the tip of the metal outer pipe By switching between injection and injection from the injection hole on the side wall, it is possible to inject a fluidized solid material such as cement milk. In addition, effects such as a simple double tube structure injection device including a metal outer tube and a tubular valve body can be obtained.
According to the third aspect of the present invention, when the injection hole at the distal end portion of the metal outer tube and the hole at the distal end portion of the tubular valve body for supplying liquid are communicated, In order not to communicate with the hole in the side wall of the tubular valve body, the injection hole in the side wall in the outer tube made of the genus and the hole in the side wall in the tubular valve body for liquid supply are shifted in the vertical direction, And when the injection hole of the metal outer pipe side wall and the hole of the side wall of the tubular valve body for liquid supply are in communication, the injection hole of the tip part of the metal outer pipe and the tubular valve body for liquid supply Since the injection hole of the metal outer tube tip and the hole of the tip of the tubular valve body for liquid supply are shifted in the tube radial direction so that the hole of the tip does not communicate with each other, By simply moving the liquid supply tubular valve body downward or upward relative to the metal outer tube, injection from the tip of the metal outer tube and injection from the injection hole on the side wall are cut off. Instead, the effects of such can inject flowable solidifying material such as cement milk is obtained.
According to the fourth aspect of the present invention, when the injection hole at the distal end portion of the metal outer tube and the hole at the distal end portion of the tubular valve body for liquid supply are communicated, The side wall injection holes in the genus outer pipe and the side wall holes in the liquid supply tubular valve body are displaced in the pipe circumferential direction so that they do not communicate with each other. When the injection hole in the side wall of the metal outer pipe and the hole in the side wall of the tubular valve body for liquid supply are in communication, the injection hole in the distal end portion of the metal outer pipe and the front end part of the tubular valve body for liquid supply Since the injection hole at the tip of the metal outer tube and the hole at the tip of the tubular valve body for liquid supply are shifted in the pipe circumferential direction so that they do not communicate with each other. Just by rotating the tubular valve body for the metal outer tube clockwise or counterclockwise, the injection from the tip of the metal outer tube and the injection from the injection hole on the side wall Switch, effects such can inject flowable solidifying material such as cement milk is obtained.
According to 5th invention, the metal outer pipe | tube in the injection device for liquid or fluid solidification material supply of any one or several invention of 1st invention-4th invention arrange | positions in a pile longitudinal direction on the outer side of a steel pipe pile main body. Thus, the following effects (1) to (5) can be obtained.
(1) There is no damage to the rubber hose or the like at the time of placing as when a conventional rubber hose is used.
(2) A tubular valve body provided with a through hole is slidably fitted inside a metal outer pipe provided with an injection hole so as to be slidable and injected from the injection hole on the peripheral side wall of the metal outer pipe. In addition, it is possible to reliably inject a time-hardening fluidized solidifying material such as cement milk into the peripheral surface of the steel pile.
(3) Conventional steel pipes could only be injected into the steel pile tip. However, in the steel pile of the present invention, time-hardening fluidity such as cement milk is present on both the steel pile tip and the steel pile peripheral surface. The solidified material can be injected.
(4) According to the above (3), a uniform expanded root-setting portion using a fluidized solidifying material such as cement milk can be formed at the tip of the steel pile, and adhesion of the peripheral side surface of the steel pile is also ensured. Therefore, it becomes the foundation pile using the steel pile which can contribute to the reliable bearing capacity expression of the steel pile and can demonstrate the certain bearing capacity.
(5) When using a plurality of types of injection devices, one or a plurality of types of injection devices can be appropriately selected and used depending on the position of the steel pile.
According to the sixth invention, on the outside of the steel pile main body, the metal outer tube in the injection device for supplying the liquid or fluidized solidifying material according to any one or more of the first to third inventions is disposed in the longitudinal direction of the pile. The injection hole is provided in the side wall of the metal outer tube at intervals in the vertical direction, and the hole for connecting to the injection hole is provided on the side wall of the tubular valve body for liquid supply, It is provided in the vertical direction at the same interval as the interval in which the injection holes are provided, and the tubular valve body for supplying liquid is movable in the vertical direction with respect to the metal outer tube and rotates in the circumferential direction. When the side wall injection hole of the metal outer pipe and the hole of the tubular valve body communicate with each other, the tip end injection hole of the metal outer pipe is closed, and the side wall injection hole of the metal outer pipe and the hole of the tubular valve body Since the tip injection hole of the metal outer tube is open when the is not in communication, the tubular valve body is connected to the metal outer tube. In the vertical direction, by moving downward or upward by the same distance as the hole interval, the injection hole on the peripheral side wall of the metal outer pipe and the hole on the peripheral side wall of the tubular valve body are matched or shifted in position. The injection hole can be closed. Moreover, the effect that it can be set as the steel pipe pile of the simple structure which can be injected from the surrounding side surface of a metal outer pipe | tube is acquired.
According to the seventh invention, on the outside of the steel pile main body, the metal outer pipe in the injection device for supplying one or more liquids or fluidized solidifying materials of the first, second and fourth inventions is disposed in the longitudinal direction of the pile. Are fixed, and the injection hole is provided in the side wall of the metal outer tube at intervals in the circumferential direction, and the hole for connecting to the injection hole is provided on the side wall of the tubular valve body for liquid supply, It is provided at intervals in the circumferential direction at the same intervals as the intervals at which the injection holes are provided, and the tubular valve body for supplying liquid with respect to the metal outer tube is rotatable in the circumferential direction and vertically. When the side wall injection hole of the metal outer pipe and the hole of the tubular valve body communicate with each other, the tip injection hole of the metal outer pipe is closed, and the side wall injection hole of the metal outer pipe and the tubular valve body When the hole is not communicating, the tip injection hole of the metal outer tube is open. In addition, by moving clockwise or counterclockwise by the same angle as the hole angle interval, the injection hole on the peripheral side wall of the metal outer tube and the hole on the peripheral side wall of the tubular valve body are matched or the position is adjusted. The injection hole can be closed by shifting. Moreover, the effect that it can be set as the steel pipe pile of the simple structure which can be injected from the surrounding side surface of a metal outer pipe | tube is acquired.
According to the eighth invention, in the steel pile according to any one of the fifth to seventh inventions, the steel pile body is either a steel pipe, an H-shaped steel, or a steel sheet pile, so that it is simply a steel pipe, an H-shaped steel, or a steel sheet pile. By providing the injection device in the above, effects such as being able to form various types of steel piles in combination with various types of steel pile main bodies can be obtained.
According to a ninth aspect of the present invention, there is provided a steel pile construction method in which vibration is applied to a steel pipe pile using a vibro hammer and high-pressure water is injected in the steel pile penetration direction. After supplying high-pressure water into the liquid tubular valve body and injecting high-pressure water from the tip of the pile to penetrate the steel pile to a predetermined depth, the fluidity into the tubular valve body instead of the high-pressure water injection Supply solidifying material, inject fluid solidifying material from the tip of the pile, build a rooting portion on the tip of the steel pile, and also provide a hole in the side wall of the tubular valve body for supplying liquid, and a metal outer tube Between the outer peripheral surface of the steel pile and the vertical hole formed in the ground around the steel pile. Since the adhesive layer is formed on the steel pile side peripheral surface by injecting the fluidized solidifying material, the injection hole Simply attach the steel pile to the steel pile with a simple structure injection device with a double pipe structure with a metal outer pipe and a tubular valve body. It is possible to obtain an effect that a steel pile that can surely exert a supporting force by forming an adhesion layer on the side peripheral surface can be easily penetrated into the ground.
According to the tenth invention, since the steel pile is supported by the solidified portion and the adhesion layer which are constructed by the steel pile construction method of the ninth invention and the fluidized solidified material is solidified, the fluidized solidified material is solidified. It can be set as the foundation pile by which the steel pile is supported by the made expanded root hardening part and the adhesion layer connected to this, and it can be set as the high quality foundation pile which can exhibit a reliable support force. It is a foundation pile that has good construction efficiency and can be constructed in a short construction period, so that it is possible to obtain an effect that the foundation pile can be constructed at a low construction cost.

It is a front view which shows the state which attached the hose etc. to the tubular valve body for liquid supply in the steel pipe pile of 1st Embodiment of this invention. FIG. 2 is a longitudinal side view showing a state of piping on one side in FIG. 1 and showing a state in which a jet nozzle of an outer pipe and a horizontal hole of an inner pipe are out of phase in the vertical direction. It is the sectional view on the aa line of FIG. It is the bb sectional view taken on the line of FIG. It is a figure which expands and shows a part of FIG. (A) is a figure which expands and shows a part of FIG. 1, (b) is a figure which shows the structure for guiding, preventing rotation of the inner pipe | tube in (a). It is the vertical side view which shows the state of the piping of the one side in FIG. 1, and shows the state which the injection nozzle of the outer tube | pipe and the horizontal hole of the inner tube | pipe matched. It is a cross-sectional top view which shows the state which the horizontal hole of the inner pipe | tube and the injection nozzle of the outer pipe | tube matched. It is a vertical front view which shows the state which injected the water jet water from the front-end | tip of the steel pipe pile of this invention, and penetrated the steel pipe pile to the ground to the predetermined position. It is a vertical front view which shows the state which injects cement milk from the front-end | tip of the steel pipe pile of this invention, and forms the rooting part in the front-end | tip of a steel pipe pile. It is a vertical front view which shows the state which sprayed cement milk on the surrounding surface of a steel pipe pile, and formed the adhesion layer between the outer peripheral surface of a steel pipe pile and a vertical hole. It is a vertical front view which shows the completed state of the pile foundation using the steel pipe pile of this invention. It is a front view which shows the state which attached the hose etc. to the steel pipe pile of 2nd Embodiment of this invention. It is the vertical side view which shows the state of the piping of the one side in FIG. 13, and shows the state which the injection nozzle of the outer tube | pipe and the horizontal hole of the inner tube | pipe matched. This is a cross-sectional plan view showing the relationship between the bottom of the inner and outer pipes, the open / close valve mechanism, the injection nozzles on the outer peripheral surface of the outer pipe, and the horizontal holes on the peripheral side of the inner pipe. It is a cross-sectional top view which shows the state corresponding to the entrance of the vertical hole of a pipe | tube. It is the vertical side view which shows the state of the piping of the one side in FIG. 13, and shows the state from which the injection nozzle of the outer tube | pipe and the horizontal hole of the inner tube | pipe shifted in the up-down direction. This is a cross-sectional plan view showing the relationship between the bottom of the inner and outer pipes, the open / close valve mechanism, the injection nozzles on the outer peripheral surface of the outer pipe, and the horizontal holes on the peripheral side of the inner pipe. It is a cross-sectional top view which shows the state which shifted the phase with the entrance of the vertical hole of a pipe | tube. (A) is a figure which expands and shows a part of FIG. 13, (b) is a figure which shows the structure guided while preventing rotation of the inner tube in (a). It is explanatory drawing which shows the construction procedure of the conventional steel pipe pile. It is a side view which shows the form of the steel pile of other embodiment of this invention. It is a side view which shows the form of the steel pile of other embodiment of this invention. (A) is dd sectional drawing of the steel pile shown in FIG. 20, (b) is ee sectional drawing of the steel pile shown in FIG. (A) And (b) is a partial cross-sectional top view which shows the steel pile of the other form which used the grooved steel sheet pile as a steel pile main body. (A) And (b) is a partial cross-sectional top view which shows the steel pile of the other form which used the hat-shaped steel sheet pile as a steel pile main body.

    Next, the present invention will be described in detail based on the illustrated embodiment.

The steel pile 1 of 1st Embodiment of this invention is shown by FIGS. In the steel pile 1 according to the first embodiment, as shown in FIG. 2 in particular, the tip end portion extends from the tip end portion in the axial direction to the top end portion on the outer peripheral surface side of the steel pile main body 2 made of the large diameter steel pipe 2a. A metal outer pipe 7 made of a steel pipe provided with injection holes 5 and 6 on the bottom wall 3 and the circumferential side wall 4 is arranged in the pile axis direction and fixed by welding or the like.
A plurality of the metal outer pipes 7 (for example, 2, 3, 4,... N, etc.) are arranged at equal angular intervals in the circumferential direction of the steel pile main body 2.
The metal outer tube 7 is provided with a vertical injection hole 5 at the center of the bottom wall 3 at the tip, and is vertically spaced from the peripheral side wall 4 of the metal outer tube 7 above the bottom wall. And a plurality of horizontal injection holes 6 at intervals (equal angular intervals) in the lateral direction.
Further, the upper end of the metal outer tube 7 is used for preventing rotation of the liquid supply tubular valve body 8 that is slidably fitted inside the metal outer tube 7. And a connecting portion 11 for connecting one end side of a drive device 10 for slidably driving the liquid supply tubular valve body 8 is a liquid supply tubular valve body. 8 is provided at the upper end.
As the engaging member 9, in the illustrated form, a single guide member provided in parallel at a circumferential interval in the upper end portion of the metal outer tube 7 so as to protrude upward. Has been.
A valve seat 13 made of an elastic material such as rubber is provided on the upper surface side of the bottom wall 3 of the metal outer tube 7. The bottom wall 3 constituting the nozzle body and the outer tube main body (side wall 4) provided so as to be connected to the upper portion thereof are integrated by welding joining or screw joining to form a metal outer tube 7. Has been.

A liquid supply tubular valve body 8 made of a steel tubular body is fitted inside the metal outer pipe 7 so as to be slidable in the vertical direction.
The liquid supply tubular valve body 8 is provided with one or a plurality of vertical through holes 15 on the bottom wall 14 at the tip thereof, and the vertical through holes 15 are formed on the metal outer tube 7. Provided at a position displaced in the radial direction from the vertical injection hole 5 provided in the bottom wall 3, the vertical injection hole 5 on the bottom wall of the metal outer tube 7 is blocked by the bottom wall 14 other than the vertical through hole 15. Acts as a disc.
The peripheral side wall 16 of the tubular valve body 8 for liquid supply above the bottom wall 3 is provided with a plurality of lateral through holes 17 spaced in the vertical direction and spaced in the lateral direction (equal angular intervals). ing. Further, the peripheral side wall between the lateral through-holes 17 acts as a valve body that closes the lateral injection hole 6 provided on the side wall of the metal outer tube 7.
The upper end of the liquid supply tubular valve body 8 is engaged with the engagement member 9 on the metal outer tube 7 side so as to be relatively movable up and down and non-rotatable in the circumferential direction. The joint portion 18 is provided, and the piston tip portion on one end side of the drive device 10 disposed in the longitudinal direction for driving the liquid supply tubular valve body 8 to be slidable is connected by the connecting portion 11. Yes.
The connecting portion 11 includes a horizontal shaft 12 such as a pin that can be attached to and detached from the bracket while welding a pair of parallel brackets spaced apart from each other.

The engaging portion 18 is a pair of laterally protruding protrusions 18a made of steel, which are fitted so as to be relatively slidable vertically so as to sandwich the one guide member 9, and a base of the protrusion 18a. The end side is fixed to the tubular valve body 8 by welding or screwing.
The driving device 10 is a telescopic jack such as a hydraulic or electric type, and a bracket on the cylinder side of the telescopic jack is attached to or detached from a support bracket fixed to the tubular valve body 8 by bolts or welding. The upper connecting portion 11 is formed by being fixed to the tubular valve body 8 as possible.
A connecting portion 19 such as a male screw portion is provided at the upper end portion of the tubular valve body 8, and a high-pressure hose 20 for supplying liquid is detachably provided at the connecting portion 19. The high-pressure hose 20 is appropriately connected to a high-pressure water supply source or a fluidized solidified material supply source such as cement milk via a switching valve or the like via a pipe line and a pump.

The plurality of lateral injection holes 6 on the metal outer tube 7 side and the plurality of lateral through holes 17 on the tubular valve body 8 side are provided at the same pitch in the vertical direction, and the metal outer tube The plurality of horizontal injection holes 6 at the same level on the 7 side and the plurality of horizontal through holes 17 at the same level on the tubular valve body 8 side are provided at equiangular intervals.
As described above, the longitudinal through-hole 15 or the lateral side for connecting to the longitudinal injection hole 5 or the lateral injection hole 6 of the metal outer tube 7 on the distal end portion of the tubular valve body 8 for supplying liquid and the circumferential side wall in the circumferential direction. By providing the through hole 17 and a wall portion for closing the injection hole on the metal outer tube 7 side, the tubular valve body 8 is moved downward by the driving device 10, and the tip of the tubular valve body 8 is moved. Is seated on the valve seat 13 of the bottom wall 3 of the metal outer tube 7, so that the vertical injection hole 5 side of the bottom wall 3 of the metal outer tube 7 is closed by the lower end side of the tubular valve body 8. The peripheral side wall 16 in the body 8 and the horizontal injection hole 6 on the peripheral side wall surface of the metal outer tube 7 are communicated with each other so that the injection can be performed from the horizontal injection hole 6.
Further, the tubular valve body 8 is moved upward by the drive device 10, and the distal end portion of the tubular valve body 8 is separated from the valve seat 13 of the bottom wall 3 of the metal outer tube 7, whereby the lower end side of the tubular valve body 8. And the vertical through hole 15 and the vertical injection hole 5 side of the bottom wall 3 of the metal outer tube 7 are communicated with each other, and the lateral through hole 17 of the peripheral side wall 16 and the peripheral side wall surface of the metal outer tube 7 of the tubular valve body 8 are communicated. By shifting the position of the horizontal injection hole 6 in the vertical direction, the side peripheral wall of the tubular valve body 8 is closed to prevent injection from the horizontal injection hole 6.
The distance from the lateral through hole 17 at the lower end of the peripheral side wall of the tubular valve body 8 to the lower end of the bottom wall 14, and the distance from the lateral injection hole 6 to the valve seat 13 at the lower end of the side peripheral wall of the metal outer tube 7 Are set to the same size, the tubular valve body 8 can be moved to the lower end level where sliding movement is possible, or the horizontal injection hole 6 can be closed by moving upward as much as the diameter of the lateral through-hole 17. .
The tubular valve body 8 is a member inside the metal outer tube 7 and does not come into contact with the ground 21, so that the same strength as that of the metal outer tube 7 is not required.
Mainly, the tubular valve body 8 connected to the metal outer tube 7 and the high-pressure hose 20 and the drive device 10 attached thereto constitute an injection device 22 for supplying a liquid or fluidized solidifying material. .

In the injection device 22 for supplying a liquid or fluidized solid material of the present invention provided in the steel pile main body 2 of the first embodiment, the metal outer provided with injection holes 5 and 6 on the tip and circumferential side walls, respectively. A liquid supply tubular valve body 8 is slidably fitted inside the pipe 7, and a tip end portion of the liquid supply tubular valve body 8 and a circumferential peripheral wall 16 are connected to the injection holes. And a wall for closing the injection hole.
Further, the bottom wall 14 of the tubular valve body 8 is provided with one or a plurality of vertical through holes 15 at positions shifted radially outward from the inlet 5a of the injection hole 5 in the metal outer tube 7. Therefore, when the tip of the tubular valve body 8 is seated on the valve seat 13, the inlet 5 a of the injection hole 5 is closed, and the lateral injection hole 6 of the metal outer pipe 7 and the tubular valve body 8 are The lateral through-holes 17 are made to match.

As shown in FIG. 9, in the steel pile 1 of the first embodiment as described above, although not shown, when a vibratory hammer is connected to the upper end of the steel pile 1 and penetrated into the ground 21 by a vibration method, While water is supplied from the liquid supply high pressure hose 20 connected to the upper end of the tubular valve body 8, high pressure water 23 is injected from the lower end side of the metal outer pipe 7 while excavating the lower side of the steel pile 1. Further, the friction between the circumferential surface of the steel pile 1 and the ground 21 can be reduced, and the steel pile 1 can be penetrated to a predetermined depth of the ground 21 (for example, from the support layer to at least the depth of the diameter of the steel pipe pile). .
Further, at a predetermined depth reaching the support layer 24, the high pressure hose 20 is switched to a time-setting fluidity solidifying material 25 such as cement milk, and sprayed from the tip of the steel pile 1 to mix the earth and sand and cement. The expanded root-solidified portion 26 (expanded bulb portion) can be formed by a homogeneous fluidized solidified material in which the milk is hardened.

Further, as shown in FIG. 11, the drive device 10 is shortened and the tubular valve body 8 is slid downward, so that the bottom wall 14 of the tubular valve body 8 causes the injection hole 5 at the tip of the steel pile 1. The lateral through hole 17 in the tubular valve body 8 and the lateral injection hole 6 in the metal outer pipe 7 are communicated with each other so that the flow of cement milk or the like flows from the lateral injection hole 6 in the metal outer pipe 7. The adhering layer 28 is formed by injecting the solidifying material 25 and filling and hardening between the inner wall 27 of the vertical hole of the ground 21 and the outer peripheral surface of the steel pipe pile, and the inner peripheral surface of the vertical hole, the outer peripheral surface of the steel pipe pile, Can be reliably attached.
Moreover, as shown in FIG. 12, by removing the bolt that fixes the bracket on the drive device 10 side, the drive device 10 is removed from the tubular valve body 8, and the high-pressure hose 20 is removed from the upper end of the tubular valve body. Thus, the foundation pile 29 using the steel pile 1 embedded and fixed in the ground 21 can be constructed.
On the foundation pile 29 as described above, for example, although not shown in the drawings, a reinforcing bar is appropriately fixed by welding, and a reinforcing bar is appropriately arranged and concrete is placed to construct a reinforced concrete footing.

Next, with reference to FIGS. 13-18, the steel pile 1 of 2nd Embodiment of this invention is demonstrated.
In the steel pipe pile 1 of the second embodiment, since there are many parts similar to the steel pile 1 of the first embodiment, the differences are mainly described, and similar elements are denoted by the same reference numerals in the drawings. A description will be given.

As shown in FIG. 14, the second embodiment is common in that the tubular valve body 8 for supplying liquid is fitted and arranged inside the metal outer tube 7. In the second embodiment, the tubular valve body 8 is held at a fixed level position, and is slidable in the circumferential direction about the longitudinal axis of the tubular valve body 8 with respect to the metal outer tube 7. This is different from the first embodiment in that it is rotated.
The bottom wall 3 of the metal outer tube 7 is spaced at least one vertical communication hole or circumferential direction or equiangular spacing in the circumferential direction as the entrance 5a at a position radially away from the center of the bottom wall 3. A plurality of vertical communication holes are provided, and the vertical communication holes are connected to the injection holes 5 provided at the tip of the metal outer tube 7.
Further, the bottom wall 14 of the tubular valve body 8 has one longitudinal through hole 15 or a circumferential direction at the same position in the radial direction as the longitudinal communication hole as the inlet 5a of the injection hole 5 on the metal outer tube 7 side. A plurality of vertical through holes 15 are provided at equal intervals in the interval or in the circumferential direction.
In the second embodiment, lateral injection holes 6 are provided in the circumferential side wall 4 of the metal outer tube 7 at intervals in the circumferential direction, and the circumferential side wall 16 of the tubular valve body 8 for liquid supply is provided with the lateral wall. The horizontal through holes 17 for connecting to the injection holes 6 are provided at the same level at intervals in the circumferential direction at the same intervals as the intervals at which the horizontal injection holes 6 are provided.
As a driving means for rotating the tubular valve body 8 in the circumferential direction with respect to the metal outer tube 7, a hydraulic jack such as a hydraulic pressure or an electric screw type with respect to the support bracket 30 of the tubular valve body 8. A drive device 10 such as a jack is disposed sideways, a mounting portion 31 fixed to the cylinder side is detachably fixed to a support bracket 30 on the tubular valve body 8 side by a vertical axis such as a bolt, and the connecting portion 11 is Is formed. Further, the piston side of the driving device 10 is connected to a bracket 32 with a vertical hole attached to the metal outer tube 7 by a vertical axis. The vertical hole provided in the bracket 32 with the vertical hole is a long hole in the radial direction of the metal outer tube 7, thereby enabling the drive device 10 to be slightly rotated.
As described above, the metallic outer tube 7 and the tubular valve body 8 are connected by the drive device 10, so that the liquid-feeding tubular valve body 8 can rotate in the circumferential direction with respect to the metal outer tube 7. And the steel pile 1 is made immovable in the vertical direction.
As a means for restricting the vertical movement of the tubular valve body 8, a lower projecting flange having a vertical circular arc-shaped hole in the circumferential direction is provided at the upper end portion of the metal outer tube 7, and the lower projecting flange is provided. An upper flange is provided on the tubular valve body 8 side so as to be superposed on the upper surface, a vertical axis is provided on the upper flange, and the vertical axis is fitted into a flat circular arc-shaped vertical hole so as to be slidable in the circumferential direction. In addition, the lower flange and the upper flange may be connected by the vertical axis.

  In the steel pile 1 of the second embodiment, as shown in FIG. 15 or FIG. 17, the lateral injection holes 6 on the peripheral side wall of the metal outer tube 7, and the lateral through holes 17 on the peripheral side wall 16 of the tubular valve body 8. In the circumferential direction, the vertical communication hole (inlet 5a) of the bottom wall 3 of the metal outer tube 7 and the vertical through hole 15 provided in the bottom wall 14 of the tubular valve body 8 are in the circumferential direction. As shown in FIG. 15, the lateral injection hole 6 side is closed when the vertical communication hole (inlet 5a) side is in communication, as shown in FIG. As shown, the side of the vertical communication hole (inlet 5a) is closed when the side of the horizontal injection hole 6 is communicating.

Although illustration is abbreviate | omitted, when using the steel pipe pile 1 of 2nd Embodiment and constructing a foundation pile in the ground, it is the same as that of the case of the steel pile 1 of the said 1st Embodiment in FIGS. 9-12. In addition, a vibro hammer or the like is connected to the upper end of the steel pile 1 and penetrated into the ground 21 by a vibration method or the like.
Moreover, by supplying water from the liquid supply high pressure hose 20 connected to the upper end of the tubular valve body 8, high pressure water is injected from the lower end side of the metal outer pipe 7 to excavate the lower side of the steel pile 1. However, the friction between the circumferential surface of the steel pile 1 and the ground 21 is reduced, and the steel pile 1 is penetrated to a predetermined depth of the ground 21 (for example, from the support layer to a depth at least about the diameter of the steel pipe pile).
In addition, at a predetermined depth, the high-pressure hose 20 is switched to a fluidized solidifying material 25 such as cement milk, and sprayed from the tip of the steel pile 1 to mix the earth and sand and harden the cement milk. The enlarged root hardening portion 26 (bulb portion) can be formed.

Further, by extending or shortening the driving device 10 and horizontally rotating the tubular valve body 8, the bottom wall 14 of the tubular valve body 8 closes the injection hole 5 at the tip of the metal outer tube 7, and The lateral through hole 17 in the tubular valve body 8 and the lateral injection hole 6 in the metal outer pipe 7 are communicated, and a fluidized solid material 25 such as cement milk is injected from the lateral injection hole 6 in the metal outer pipe 7. By filling and hardening between the inner peripheral wall of the vertical hole of the ground 21 and the outer peripheral surface of the steel pile, adhesion between the inner peripheral surface of the vertical hole and the outer peripheral surface of the steel pile can be reliably achieved.
Further, by removing the vertical axis such as a bolt fixing the bracket on the drive device 10 side, the drive device 10 is removed from the tubular valve body 8 and the high-pressure hose 20 is removed from the upper end portion of the tubular valve body. The foundation pile 29 using the steel pile 1 embedded and fixed to 21 can be constructed.
On the foundation pile 29 as described above, for example, although not shown, a connecting reinforcing bar such as a barbed reinforcing bar is appropriately fixed by welding, a reinforcing bar is appropriately arranged, and concrete is placed to form a reinforced concrete footing. Built.

As described above, the injection device 22 for supplying a liquid or fluidized solidifying material of the present invention provided in the steel pile main body 2 is a metal outer tube provided with injection holes 5 and 6 on the tip and circumferential side walls, respectively. 7, a liquid supply tubular valve body is slidably fitted, and the liquid supply tubular valve body has a distal end portion and a circumferential peripheral wall for connecting to the injection hole. A hole and a wall portion for closing the injection hole are provided.
Further, in the injection device 22 for supplying a liquid or fluidized solidifying material of the present invention, the injection hole 5 at the distal end portion of the metal outer tube and the hole at the distal end portion of the tubular valve body 8 for supplying liquid are communicated. Sometimes, the injection hole 6 on the metal outer tube side wall and the lateral through hole on the side wall of the liquid supply tubular valve body 8 do not communicate with each other, The hole at the tip of the tubular valve body 8, the injection hole on the side wall in the metal outer tube, and the hole on the tip and side wall of the tubular valve body 8 for supplying liquid are provided with their positions shifted.

  As described above, the steel pile construction method of the present invention is a steel pile construction method in which vibration is applied to the steel pile using a vibro hammer and high-pressure water is injected in the steel pile penetration direction. 1 is used to supply high-pressure water into the liquid supply tubular valve body 8 and inject high-pressure water from the tip of the pile to penetrate the steel pile 1 to a predetermined depth while reducing the frictional force with the ground 21. After that, instead of the injection of the high-pressure water, the fluidized solidifying material 25 is supplied into the tubular valve body 8, and the fluidized solidifying material 25 is injected from the tip of the pile and expanded to the tip of the steel pile. The solidified portion 26 is constructed, and the circumferential through hole 17 on the peripheral side wall of the liquid supply tubular valve body 8 and the injection hole 6 on the peripheral side wall of the metal outer tube 7 are connected to each other. The vertical hole 2 formed in the outer peripheral surface of the steel pile 1 and the ground 21 around the steel pile by injecting the fluidized solidified material 25 from the injection hole of the side wall 4 Forming an adhesion layer 25 to the steel pile side peripheral surface by injecting a flowable solidifying material 25 between.

  In the steel pipe pile construction method of the present invention, since the metal outer tube 7 side is in contact with the ground 21, the problem of the hose having a weak tensile strength can be solved as in the prior art. Therefore, the steel pile 1 with a simple structure can be obtained, and the construction efficiency is also improved.

  Moreover, the foundation pile 29 by which the steel pile 1 is supported by the expanded root solidification part 26 and the adhesion layer 27 which connect with this by the construction method of the above steel piles is solidified easily. Can be built. In the foundation pile 29 as described above, the construction cost is reduced because the construction efficiency is good.

  When carrying out the present invention, although not shown in the drawings, the steel pile 1 is provided with a steel pile main body 2 made of a steel pipe pile, and the injection nozzle main body consisting of the bottom wall 3 facing the tip of the metal outer pipe While providing a direction injection nozzle, the horizontal hole penetrated in the side wall of the steel pipe pile front-end | tip part is provided, the said inward injection nozzle is arrange | positioned in the horizontal hole which penetrates the said side wall, and it injects toward the inner side of the steel pile 1. By doing so, the removal of the adhering soil in the steel pile 1 with high-pressure water and the mixing of the fluid solidifying material such as cement milk and the soil in the steel pile can be efficiently performed to obtain a homogeneous soil cement. it can.

  When implementing this invention, when the depth is deep, it is good also as a steel pile which connected the upper steel pile unit to the upper part of the lower steel pile unit. In this case, the bottom wall 3 at the lower end of the metal outer pipe in the upper steel pile unit and the bottom wall of the tubular valve body 8 are omitted, and a screw joint is provided on the tubular valve body in the upper and lower steel pile units. In addition, the upper and lower metal outer tubes 7 may be appropriately welded or appropriately welded or screwed together using a joint tube. After arranging the tubular valve bodies in the joint pipe and connecting the tubular valve bodies to each other, the joint pipes may be joined to the upper and lower metal outer pipes.

  When practicing the present invention, as the steel pile body 2, as shown in FIGS. 20 and 22 (a), a steel pile body 2 made of H-section steel 2b is used, and the web 38 of the H-section steel 2b is used. An injection device 22 for supplying a liquid or flowable solidifying material provided with a metal outer tube 7 is arranged at the center in the width direction of the web 38 and is arranged along the longitudinal direction of the web 38 and is made of metal by welding or the like. The pipe 7 may be fixed and one injection device 22 may be provided. Further, as shown in FIGS. 21 and 22 (b), an injection device 22 for supplying a liquid or fluid solidifying material along each inner corner formed by the web 38 and the flange 39 in the H-section steel 2b. May be disposed, and fixed to the web 38 and the flange 39 by welding, and two injection devices 22 for supplying a liquid or fluid solidifying material may be provided. 22 (a) and 22 (b) may be combined to provide three injection devices 22 for supplying a liquid or fluid solidifying material, or a plurality of liquids or fluids may be provided in the web 38 or the flange 39 portion. Four or more injection devices 22 for supplying the solidifying material may be provided at intervals.

  Furthermore, when practicing the present invention, as shown in FIG. 23 (a), the steel pile body 2 has a groove shape in which webs 38 are integrally connected to both sides of the flange 39 and joints 40 are provided on the webs 38, respectively. A steel sheet pile 2c may be used. In such a pile main body 2, one injection device 22 for supplying a liquid or fluidized solidifying material provided with the metal outer tube 7 is provided along the flange 39 inside the groove in the grooved steel sheet pile 2 c. Also good. Or as shown in FIG.20 (b), you may make it provide the injection device 22 for supply of a liquid or fluid solidification material along the inner corner part inside the groove | channel in the grooved steel sheet pile 2c. Further, similarly to the above-described embodiment, three injection devices 22 for supplying a liquid or fluid solidifying material may be provided by combining FIGS. 23A and 23B, or the web 38 or the flange 39 may be provided. In this part, a plurality of liquid or fluidity solidifying material supplying jetting devices 22 may be arranged at intervals, and four or more jetting devices 22 may be provided.

Further, as shown in FIG. 24A, the steel pile main body 2 includes webs 38 integrally provided on both sides of the flange 39 and arm portions 41 parallel to the flanges 38 respectively. In addition, a steel sheet pile 2d (a steel sheet pile having a cross-sectional hat shape) provided with a joint 40 at the end of each arm portion 41 may be used. In such a pile main body 2, an injection device 22 for supplying a liquid or fluid solidifying material provided with a metal outer tube 7 is provided at the center in the width direction of the flange 39, and the longitudinal direction of the flange 39 inside the groove in the steel sheet pile 2 d. One may be provided along the direction. As shown in FIG. 24 (b), two injection devices 22 for supplying liquid or fluidized solidifying material are provided along the inner corner of the steel sheet pile 2d inside the groove. One may be provided. Further, three or four or more injection devices 22 for supplying a liquid or fluid solidifying material may be provided in the same manner as described above.
23 and 24, the arrangement form of the upper and lower portions of the injection device 22 for supplying the liquid or fluidized solidifying material to the steel sheet pile 2c (2d) as the steel pile body 2 is the arrangement shown in FIG. 20 or FIG. Same as relationship.

When providing the injection device 22 for supplying a plurality of liquid or fluidized solidifying materials to the steel pile body 2, one of the injection device 22 of the first embodiment and the injection device 22 of the second embodiment is selected. It may be used, or a plurality of types of liquid or fluidized solidifying material supply injection devices 22 may be appropriately selected and used. Depending on the arrangement position with respect to the steel pile body, a plurality of types of liquid or fluidized solidified material may be used as appropriate. You may use the injection apparatus 22 for supply.
As described above, the injection device 22 for supplying the liquid or fluidized solidifying material of the present invention is incorporated in the steel pile body 2 of various forms such as a steel pipe or a grooved steel sheet pile, thereby providing various forms of the injection device. The steel pile 1 can be obtained.

DESCRIPTION OF SYMBOLS 1 Steel pile 2 Steel pile main body 2a Steel pipe 2b H-section steel 2c Groove-shaped steel sheet pile 2d Steel sheet pile (cross-section hat-shaped steel sheet pile)
3 Outer tube bottom wall 4 Side wall 5 Injection hole (outer tube bottom wall)
5a Inlet 6 Injection hole (on the peripheral wall of the outer tube)
7 Metal outer tube 8 Tubular valve body 9 Engagement member 10 Drive device 11 Connecting portion 12 Horizontal shaft 13 Valve seat 14 Bottom wall (of tubular valve body)
15 Longitudinal hole (for tubular valve body)
16 Side wall (in the tubular valve body)
17 Horizontal through-hole 18 Engagement part 19 Connection part 20 High-pressure hose 21 Ground 22 Injection device 23 High-pressure water 24 Support layer 25 Fluidity solidifying material 26 Rooting part 27 Vertical hole inner peripheral wall 28 Adhesion layer 29 Foundation pile 30 Support bracket 31 Attaching Part 32 Bracket with vertical hole 35 Vibro hammer 36 Steel pipe pile 37 Rubber hose 38 Web 39 Flange 40 Joint 41 Arm part

Claims (10)

  An injection device for supplying a liquid or a fluidized solidifying material, wherein a liquid supply tubular valve body is slidably fitted inside a metal outer tube having injection holes on the tip and circumferential side walls, respectively. And a hole for connecting to the inlet connected to the injection hole of the metal outer pipe, and the injection hole of the metal outer pipe, on the distal end portion and the circumferential side wall of the liquid supply tubular valve body And a wall for closing an inlet connected to the liquid or flowable solidifying material supplying device.   When the injection hole at the tip of the metal outer tube and the hole at the tip of the tubular valve body for liquid supply are in communication, the injection hole of the metal outer tube side wall and the side wall of the tubular valve body for liquid supply The injection hole on the side wall of the metal outer pipe and the hole on the side wall of the tubular valve body for liquid supply are provided so as to be shifted from each other so as not to communicate with each other. 2. An injection device for supplying a liquid or fluidized solid material according to 1.   When the injection hole at the tip of the metal outer tube and the hole at the tip of the tubular valve body for liquid supply are in communication, the injection hole of the metal outer tube side wall and the side wall of the tubular valve body for liquid supply The side wall injection hole in the genus outer tube and the side wall hole in the liquid supply tubular valve body are shifted in the vertical direction so that the hole does not communicate with each other, and the metal outer tube When the injection hole in the side wall and the hole in the side wall of the liquid supply tubular valve body communicate with each other, the injection hole in the tip portion of the metal outer pipe and the hole in the tip portion of the liquid supply tubular valve body are The injection hole at the distal end portion of the metal outer tube and the hole at the distal end portion of the tubular valve body for liquid supply are shifted in the radial direction of the tube so as not to communicate with each other. 4. An injection device for supplying a liquid or fluid solidifying material according to 1.   When the injection hole at the tip of the metal outer tube and the hole at the tip of the tubular valve body for liquid supply are in communication, the injection hole of the metal outer tube side wall and the side wall of the tubular valve body for liquid supply In order to prevent the holes from communicating with each other, the injection hole on the side wall of the outer pipe made of the metal and the hole on the side wall of the tubular valve body for supplying liquid are shifted in the circumferential direction of the pipe and the side wall of the metal outer pipe When the injection hole communicates with the hole in the side wall of the liquid supply tubular valve body, the injection hole in the distal end portion of the metal outer pipe communicates with the hole in the distal end portion of the liquid supply tubular valve body. The injection hole at the tip portion of the metal outer tube and the hole at the tip portion of the tubular valve body for supplying liquid are shifted in the tube circumferential direction so as not to cause Injection device for supplying liquid or fluidized solidifying material.   The metal outer pipe | tube in the injection apparatus for a liquid or fluid solidification material supply as described in any one of Claims 1-4 is fixed to the outer side of a steel pile main body at the pile longitudinal direction. A steel pile characterized by that.   On the outside of the steel pile main body, a metal outer tube in the injection device for supplying one or more liquids or fluidized solidifying materials according to any one of claims 1 to 3 is arranged and fixed in the longitudinal direction of the pile, The injection hole is provided in the side wall of the metal outer pipe at intervals in the vertical direction, and the injection hole is provided in the side wall of the liquid supply tubular valve body for connection to the injection hole. Is provided at an interval in the vertical direction at the same interval as the interval between the metal pipe and the tubular valve body for supplying liquid is movable in the vertical direction and non-rotatable in the circumferential direction. When the side wall injection hole of the outer tube and the hole of the tubular valve body communicate with each other, the tip end injection hole of the metal outer tube is closed, and the side wall injection hole of the metal outer tube and the hole of the tubular valve body do not communicate with each other Is a steel pile characterized in that the tip injection hole of the metal outer pipe is open.   On the outside of the steel pile main body, a metal outer pipe in the injection device for supplying one or more liquids or fluidized solidifying materials according to any one of claims 1 to 3 is arranged and fixed in the longitudinal direction of the pile, The injection hole is provided in the side wall of the metal outer pipe at intervals in the circumferential direction, and the injection hole is provided in the side wall of the liquid supply tubular valve body for connection to the injection hole. The liquid supply tubular valve body is provided in the circumferential direction at the same interval as the interval between the metal outer tube and the liquid supply tubular valve body is rotatable in the circumferential direction and immovable in the vertical direction. When the side wall injection hole of the outer tube and the hole of the tubular valve body communicate, the tip end injection hole of the metal outer tube is closed, and the side wall injection hole of the metal outer tube and the hole of the tubular valve body do not communicate A steel pile characterized by the fact that the tip injection hole of the metal outer tube is open.   The steel pile main body according to any one of claims 5 to 7, wherein the steel pile main body is any one of a steel pipe, an H-shaped steel, and a steel sheet pile.   A steel pile construction method for injecting high-pressure water in the steel pile penetration direction in placing the steel pile, wherein the steel pile according to any one of claims 5 to 8 is used to supply high-pressure water into a tubular valve body for liquid supply. And injecting high-pressure water from the tip of the pile and penetrating the steel pile to a predetermined depth, supplying a fluidized solidifying material into the tubular valve body in place of the high-pressure water injection, The fluidized solidified material is sprayed from the tip, a root is formed at the tip of the steel pile, and the hole in the side wall of the tubular valve body for liquid supply and the hole in the side wall of the metal outer tube are connected. The fluidized solidified material is injected from the injection hole in the side wall of the metal outer pipe, and the fluidized solidified material is injected between the outer peripheral surface of the steel pile and the vertical hole formed in the ground around the steel pile. A steel pile construction method characterized by forming an adhesion layer on the pile side peripheral surface side.   A foundation pile, which is constructed by the method for constructing a steel pile according to claim 9, and is supported by a solidified portion and an adhesion layer in which a fluidized solidifying material is solidified.

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