JP6381747B1 - Pile head processing bucket height position indicator - Google Patents

Abstract

A structure capable of quickly and accurately adjusting a pile head processing bucket to a pile head processing target height is provided.
A pile head processing bucket height position indicator 31 includes a vertical member 32c protruding upward from the pile head processing bucket 10 and a pile head processing bucket extending laterally from an upper end side portion of the vertical member. The horizontal member 32b that protrudes to the outer diameter side and is raised from the upper edge of the pile head processing bucket by the first predetermined dimension (Ha-Kaeri vertical dimension), and the lower end side portion of the vertical member and the pile head processing bucket are connected. The lower edge of the pile head processing bucket by the horizontal member being positioned at the same height as the upper end of the anchor bar 103 protruding upward from the design top end height T of the cast-in-place concrete pile. Is displayed at a height position Y lower than the upper end of the anchor bar by a second predetermined dimension (Ha + Hb + Hc).
[Selection] Figure 8

Description

  The present invention relates to a structure used with a pile head processing bucket to position a pile head processing bucket at a pile head processing target height.

  The cast-in-place concrete pile has a preset top height, and concrete of a predetermined quality is placed from the bottom of the excavated pile hole to the design top height. In the next pile head treatment, the poor surplus concrete above the design top height is removed with the design top height as a boundary. Specifically, a pile head processing target height that is a predetermined height position is set above the design top edge height, and surplus concrete that is higher than the pile head processing target height is removed.

  In the pile head processing of cast-in-place concrete piles, for example, Japanese Utility Model Laid-Open No. 61-2544 (Patent Document 1), Japanese Patent Application Laid-Open No. 4-347208 (Patent Document 2), Japanese Patent Application Laid-Open No. 2002-146882 (Patent Document). As described in 3) and Japanese Patent No. 6093466 (Patent Document 4), a technique for removing the surplus concrete remaining on the pile head before curing is conventionally known. By using the pile head treatment buckets described in these patent documents, the construction period is shortened, no dust is generated, no noise is generated, and the work efficiency is improved, compared with the method of scraping after the surplus concrete is hardened. This is advantageous in all aspects.

Japanese Utility Model Publication No. 61-2544 JP-A-4-347208 Japanese Patent Laid-Open No. 2002-146782 Japanese Patent No. 6093466

  When removing the surplus concrete with the pile head processing bucket, it is better that the surplus concrete is not missed. Therefore, it is conceivable that the pile head processing target height is as close as possible to the design top edge height and the pile head processing bucket is accurately matched to the pile head processing target height.

  However, at the actual construction site, the pile hole is filled with surplus concrete, and the pile head treatment bucket moves up and down in the pile hole, so the height position of the pile head treatment bucket must be confirmed accurately. Is difficult. For this reason, at the actual construction site, the pile head treatment target height was separated from the design top height with a margin, and there was a lot of overfilled concrete being dropped.

  In view of the above circumstances, an object of the present invention is to provide a structure that can quickly and accurately match a pile head processing bucket to a pile head processing target height.

  For this purpose, a pile head processing bucket height position indicator according to the present invention is an instrument for a pile head processing bucket that is inserted into a pile hole of a cast-in-place concrete pile, upward from the pile head processing bucket. A projecting vertical member, and a lateral member extending laterally from the upper end side portion of the vertical member and projecting to the outer diameter side from the pile head processing bucket and being raised by a first predetermined dimension from the upper edge of the pile head processing bucket And a lower end side portion of the vertical member and a connecting portion for connecting the pile head processing bucket, and the horizontal member is located at the same height as the upper end of the anchor bar protruding upward from the design top end height of the cast-in-place concrete pile It is displayed that the height position of the lower edge of the pile head processing bucket is a height position lowered by the second predetermined dimension from the upper end of the anchor bar.

  According to the present invention, by aligning the transverse member with the upper end of the anchor bar, the lower edge of the pile head processing bucket can be matched with the pile head processing target height, and the work efficiency of the pile head processing is improved. In addition, the pile head target height can be brought close to the design top edge height, so that excess concrete can be omitted as much as possible. In addition, the lower edge of the pile head processing bucket coincides with the lower surface of the bottom wall portion or is at substantially the same height position. When the lower surface of the bottom wall portion is positioned above the lower edge of the pile head processing bucket, the protrusion height of the vertical member may be adjusted so that the lower surface of the bottom wall portion matches the pile head processing target height.

  The structure of the connection part which connects an up-down direction member to a pile head processing bucket is not specifically limited. As one embodiment of the present invention, the connecting portion is fixed to the pile head processing bucket and guides the lower end portion of the vertical member so that it cannot move in the horizontal direction and can move in the vertical direction, and prohibits vertical movement. And a fixture that holds the lower end of the vertical member. According to this embodiment, it is possible to adjust the first predetermined dimension representing the height of the transverse member as viewed from the pile head processing bucket, and it is possible to cope with a plurality of types of on-site concrete piles with different protrusion heights of anchor bars. Become. A fixing tool is provided in a guide part, for example, and holds an up-and-down direction member immovable in the up-and-down direction by pressing an up-and-down direction member against the guide part. The fixing tool should just be what fixes an up-down direction member to a connection part. In another embodiment, the vertical member is fixed to the connecting portion so as not to be adjusted.

  The structure of the guide part is not particularly limited. As a preferred embodiment of the present invention, the vertical member extends straight in the vertical direction, and the guide portion is a groove or a tube for receiving the vertical member. As a more preferred embodiment, at least the lower end region of the vertical member is a round pipe or a solid round bar, and the guide portion includes a cylindrical body through which the lower end region of the vertical member is inserted. According to this embodiment, the first predetermined dimension can be easily adjusted. As another embodiment, the connecting portion may have a structure that does not have the guide portion and is coupled to the vertical member only by the fixture.

  The shape of the lateral member and the vertical member is not particularly limited. As an embodiment of the present invention, the lateral member and the vertical member constitute an inverted L-shaped bar formed integrally. According to this embodiment, the pile head processing bucket height position indicator can have a simple structure, which is advantageous in terms of cost.

  As described above, according to the present invention, the lower edge or the lower surface of the pile head processing bucket can be matched with the pile head processing target height simply, quickly and accurately, and the work efficiency of the pile head processing is improved. In addition, the pile head target height can be brought close to the design top edge height, so that excess concrete can be omitted as much as possible.

It is a top view which shows a pile head processing bucket and a pile head processing bucket height position indicator. It is a side view which shows a pile head processing bucket and a pile head processing bucket height position indicator. It is a bottom view which shows a pile head processing bucket. It is a top view which shows the inside of a pile head processing bucket, and an anchor reinforcement. It is an expanded sectional view showing the bottom wall part of a pile head processing bucket. It is an expanded sectional view showing the thickness of the bottom wall part of a pile head processing bucket. It is a longitudinal cross-sectional view which shows a mode that a pile head processing bucket takes in surplus concrete. It is a longitudinal cross-sectional view which shows completion of a pile head process. It is a longitudinal cross-sectional view which shows the displacement of the bottom wall part of a pile head processing bucket. It is a general view which shows the pile head processing bucket height position indicator which becomes one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view showing a pile head processing bucket height position indicator together with a pile head processing bucket according to an embodiment of the present invention. FIG. 2 is a side view showing the embodiment, and a partial cross-section is shown for reference. FIG. 3 is a bottom view showing the embodiment, showing a bottom surface of the bottom wall portion. FIG. 4 is an internal plan view showing an upper surface of the bottom wall portion of the embodiment, and shows a state in which the bottom wall portion is viewed from the inside of the pile head processing bucket. The pile head processing bucket 10 is a bottomed iron bucket and includes a circular bottom wall portion 11 and a cylindrical peripheral wall portion 12. The peripheral wall portion 12 rises from the outer edge of the bottom wall portion 11.

  The peripheral wall portion 12 forms a side portion of the pile head processing bucket 10. An upper end of the peripheral wall portion 12 is extended with a burley 14 having a shape that swells upward. A horizontal member such as a beam 16 is installed on the upper end of the peripheral wall 12. Each beam 16 extends along the diameter of the peripheral wall portion 12 and is joined at the center of the peripheral wall portion 12. In the present embodiment, the two beams 16 are arranged so as to be orthogonal, but the number of the beams 16 and the arrangement layout of the beams are not limited to this. The rigidity of the peripheral wall portion 12 is increased by the beam 16. A central connecting portion 18 is provided at a connecting portion between the beams 16. The center connecting portion 18 has a cross-sectional shape such as a square or other polygons, and protrudes upward. The center connection part 18 is arrange | positioned in the center of the surrounding wall part 12, and it can connect with the kelly bar which is not illustrated so that relative rotation is impossible, and can be isolate | separated from a kelly bar as needed. The horizontal member may be disposed above the bottom wall portion 11 and coupled to the center connecting portion 18, and the shape of the horizontal member is not particularly limited. The horizontal member may have another shape (not shown) in addition to the beam 16 shown in the present embodiment.

  The bottom wall 11 is a circular plate having an upper surface and a lower surface 11d, and the lower surface 11d is formed flat. The upper surface of the bottom wall portion 11 includes a flat surface 11b and an inclined surface 11c as will be described later. The bottom wall portion 11 forms the bottom portion of the pile head processing bucket 10 and covers the lower end of the peripheral wall portion 12. As shown in FIG. 3, the bottom wall portion 11 has a surplus concrete intake (hereinafter simply referred to as intake 13) for taking in the surplus concrete. The intake port 13 is, for example, a fan-shaped hole. The intake port 13 passes through the bottom wall portion 11. The intake port 13 has a shape corresponding to the circular bottom wall portion 11, and has a top edge 13 p adjacent to the central portion 15 of the bottom wall portion 11 and an outer edge 13 q along the outer edge of the bottom wall portion 11. Further, the intake port 13 has a circumferential one edge 13m connecting one circumferential end of the top edge 13p and the outer edge 13q, and a circumferential other edge 13n connecting the circumferential other end of the top edge 13p and the outer edge 13q. One circumferential edge 13 m and the other circumferential edge 13 n extend in the radial direction of the pile head processing bucket 10.

  The intake port 13 is arranged at two locations so as to be symmetrical with respect to the central portion 15 of the pile head processing bucket 10. Or you may arrange | position to the circumferential direction equal intervals in three or more places as a modification which is not illustrated. Each intake port 13 has the same shape and is covered with a plate-like lid member 17. The lid member 17 is made of a material that is not easily elastically deformed, such as steel. In any case, the lid member 17 is heavier than the specific gravity of the concrete, and is formed in a sector shape corresponding to the shape of the intake port 13. Strictly speaking, the top edge 13p does not have to be a point, and may be an arc, a curve other than an arc, or a straight line. The outer edge 13q does not have to be a strict arc, and may be, for example, a substantially arc, a curve other than an arc, or a straight line. The opening area from the circumferential one edge 13m to the circumferential other edge 13n may be a predetermined value included in the range of 15 ° to 45 °. This is because if the opening area is less than 15 °, the amount of extra-concrete concrete taken up is small. Moreover, it is because the pressure of the surplus concrete which acts on the cover member 17 when the pile head processing bucket 10 is lifted is too large when an opening area | region is 45 degrees or more.

  In addition to the fan-shaped hole shown in FIG. 3, the intake port 13 may have a shape similar to a fan-shaped hole, for example, a triangular hole, a trapezoidal hole, It may be a rectangular hole. In any case, the through hole (take-in port 13) for taking in the extra concrete is disposed between the center of the bottom wall portion 11 and the outer edge. Similar modifications are possible for the shape of the lid member 17.

  Next, a connection structure between the bottom wall portion 11 and the lid member 17 will be described.

  As shown in FIG. 4, a bottom wall-side protrusion 26 that protrudes upward is provided on the upper surface of the bottom wall portion 11. The bottom wall-side protrusion 26 is disposed adjacent to the one circumferential edge 13 m of the intake port 13. The bottom wall side protrusion 26 is a steel plate and is coupled to the bottom wall portion 11 by welding or bolt fastening. In the present embodiment, the two bottom wall-side protrusions 26 are arranged at an interval in the substantially radial direction of the bottom wall portion 11 and are paired so as to face each other. Further, in the present embodiment, with respect to the radial direction of the bottom wall portion 11, the pair of bottom wall side protrusions 26. 26 are relatively disposed on the inner diameter side, and the other pair of bottom wall side protrusions 26. Arranged on the outer diameter side, these two-to-four bottom wall side protrusions 26 are aligned in the lateral direction.

  On the upper surface of the lid member 17, a lid-side protrusion 27 that protrudes upward is provided. The lid-side projection 27 is a steel plate, for example, and is coupled to the lid member 17 by welding or bolt fastening. In the present embodiment, two lid-side protrusions 27 are provided for one lid member 17. Each lid-side projection 27 extends beyond one circumferential edge of the lid member 17 and is interposed between a pair of bottom wall-side projections 26.26. Each lid-side protrusion 27 is formed with a round hole through which the shaft 19 passes. The inner diameter of the round hole is slightly larger than the outer diameter of the shaft 19.

  FIG. 5 is a developed cross-sectional view showing the thickness of the bottom wall portion of the pile head processing bucket, and shows a state where the lid member 17 is in the closed position. Each bottom wall side projection 26 provided on the bottom wall portion 11 is formed with a long hole 26h extending in the vertical direction. The long hole 26h penetrates the bottom wall side protrusion 26 in the plate thickness direction. The long holes 26h and 26h respectively formed in the pair of bottom wall side protrusions 26 coincide with each other in the penetration direction of the long hole 26h. Furthermore, the long holes 26h formed in the plurality of bottom wall side protrusions 26 described above all coincide with each other in the penetration direction of the long holes 26h. The penetration direction of the long hole 26 h substantially coincides with the radial direction of the bottom wall portion 11. A common shaft 19 is inserted into each pair of long holes 26h, 26h. Therefore, each shaft 19 extends substantially parallel to the radial direction of the bottom wall portion 11 and extends along the circumferential one edge 13m.

  The width dimension of the long hole 26 h is slightly larger than the outer diameter dimension of the shaft 19. Therefore, the shaft 19 is guided in the long hole 26h and can move in the vertical direction.

  The shaft 19 is, for example, a combination of a bolt 19b and a nut 19n. The head of the bolt 19b is locked to one bottom wall side protrusion 26, and the shaft portion of the bolt 19b passes through one long hole 26h, the round hole of the lid side protrusion 27, and the other long hole 26h. The nut is screwed onto the tip of the shaft portion of the bolt 19b. For this reason, a pair of bottom wall projections 26 and 26 are interposed between the nuts 19n and the heads of the bolts 19b. The lid member 17 is connected to be rotatable about a shaft 19. However, the shaft 19 is not limited to a combination of a bolt and a nut.

  Thus, both ends of each shaft 19 are connected to the pair of bottom wall projections 26, 26, respectively. The central portion of the shaft 19 is connected to the tip portion of the lid-side protrusion 27.

  The lid member 17 is slightly larger than the intake port 13. For this reason, referring to FIG. 4, the four sides of the lid member 17 are located on the top edge 13p, the outer edge 13q, the circumferential one edge 13m, and the circumferential other edge 13n in the vertical direction with the top surface of the bottom wall portion 11. Each overlaps. Therefore, according to the present embodiment, the intake port 13 can be closed with a high degree of sealing. Specifically, the three sides of the lid member 17 are in contact with the flat surface 11b of the bottom wall portion 11 at the top edge 13p, the outer edge 13q, and one circumferential edge 13m. The remaining one side is in contact with the inclined member 11e attached to the flat surface 11b of the bottom wall portion 11 and protruding from the flat surface 11b.

  Here, an upward inclined surface 11c is formed on the inclined member 11e. A downwardly inclined surface 17 c corresponding to the inclined surface 11 c is formed at the edge of the lid member 17. When the lid member 17 is in the closed position (FIG. 5), the inclined surface 17c comes into contact with the inclined surface 11c of the inclined member 11e. According to the lid member 17 of this embodiment, since all the edge parts of the lid member 17 contact the bottom wall part 11 in the up-down direction, high sealing performance can be exhibited.

  FIG. 6 is a developed cross-sectional view illustrating the thickness of the bottom wall portion of the present embodiment, and represents an open position where the opening degree of the lid member 17 is maximized. The lid member 17 is separated upward from the bottom wall portion 11 in the open position. A stopper 22 is erected on the upper surface of the bottom wall portion 11. The stopper 22 protrudes to the intake port 13 beyond the circumferential one edge 13m. A downwardly inclined surface 22 c is formed at the tip of the stopper 22. The inclined surface 22c is inclined so as to be higher as it is away from the one circumferential edge 13m, and faces the upper surface of the lid member 17.

  When the lid member 17 moves upward to the maximum open position, the tip of the stopper 22 comes into contact with the lid member 17, and the opening degree of the lid member 17 is regulated. At this time, the inclined surface 22 c comes into surface contact with the upper surface of the lid member 17. Thus, the lid member 17 is movable between the closed position shown in FIG. 5 and the maximum open position shown in FIG. 6, and the opening degree of the lid member 17 changes continuously.

  If it adds here, the opening degree of the cover member 17 consists of a composite of the rocking | fluctuation centering on the axis | shaft 19, and the up-down direction displacement along the long hole 26h. According to this embodiment, the degree of freedom of movement of the lid member 17 is increased. Therefore, foreign matter such as sand and pebbles mixed in the surplus concrete is prevented from being caught between the bottom wall portion 11 and the lid member 17. Even if a foreign object is sandwiched between the bottom wall portion 11 and the lid member 17, the foreign object can be quickly discharged by the free movement of the lid member 17. Therefore, according to this embodiment, the lid member 17 can be reliably returned from the open position (FIG. 6) to the closed position (FIG. 5).

  When receiving the external force, the lid member 17 is lifted upward from the closed position and opens the intake port 13. And the opening degree of the intake 13 becomes large, so that the moving amount | distance upwards is large.

  Although the opening degree of the lid member 17 changes, it does not swing until it stands vertically, and the opening degree is regulated by the stopper 22. The maximum opening of the lid member 17 is included in the range of 20 ° to 80 °. When the maximum opening degree of the lid member 17 is less than 20 °, the amount of surplus concrete taken in from the intake port 13 is reduced. When the maximum opening degree of the lid member 17 exceeds 90 °, it is difficult for the lid member 17 to return to the closed position by its own weight.

  Due to the stopper 22, the lower surface of the lid member 17 is always directed downward as shown in FIG. When the upward external force acting on the lid member 17 disappears, the lid member 17 returns to the closed position (FIG. 5) by its own weight.

  Returning the description to FIG. 2, the bottom wall portion 11 is connected to the lower end portion of the peripheral wall portion 12 through the rotation shaft 20 at one place on the outer edge of the bottom wall portion 11. As shown in FIG. 2, the bottom wall portion 11 is held at the normal position by the lock mechanism 21 and covers the lower end of the peripheral wall portion 12. However, the bottom wall portion 11 can be pivoted downward about the pivot shaft 20 and can be displaced to a release position described later.

  A pile head processing bucket height position indicator 31 is attached to the pile head processing bucket 10. The pile head processing bucket height position indicator 31 includes a vertical member 32c, a horizontal member 32b, and a connecting portion 33.

  The connecting portion 33 is installed inside the peripheral wall portion 12. Specifically, it is fixedly attached to the beam 16. The vertical member 32 c is a bar extending in the vertical direction, is supported by the connecting portion 33 on the lower end side, and the upper end side protrudes upward beyond the peripheral wall portion 12 and the burr 14. The lateral member 32b changes its direction from the upper end of the vertical member 32c, extends in the horizontal direction, straddles the upper portion of the burr 14, and reaches the outer diameter side from the peripheral wall portion 12. As will be described in detail later, the lateral member 32b can contact the upper end of the anchor bar of the cast-in-place concrete. The vertical member 32c and the horizontal member 32b are rods having the same thickness and constitute an inverted L-shaped rod body. Such a rod is, for example, a round pipe having a constant outer diameter.

  The connecting portion 33 includes a cylindrical body 34 and a fixture 35. The cylindrical body 34 is attached and fixed to the side surface of the beam 16 in a separable manner, for example, with a band or a clamp member. Alternatively, the cylindrical body 34 may be coupled to the pile head processing bucket 10 in an inseparable manner by welding or the like. A round bar vertical member 32c is passed through the central hole of the cylindrical body 34 oriented in the vertical direction. Using the cylindrical body 34 as a guide portion, the vertical member 32c is relatively movable in the vertical direction. The vertical member 32c may be detachable from the connecting portion 33. Alternatively, a plurality of vertical members 32c having different lengths are prepared, and one vertical member 32c selected from these members is provided. You may attach to the connection part 33 so that replacement | exchange is possible.

  The fixture 35 is, for example, a combination of a bolt and a nut, and the bolt is screwed into a female screw hole formed so as to penetrate the cylindrical body 34 in the radial direction. The tip of the bolt contacts the vertical member 32c. When the bolt as the fixture 35 is tightened, the tip of the fixture 35 (bolt) firmly presses the vertical member 32c, and the vertical member 32c is fixed to the cylindrical body 34 so as not to be relatively movable. On the other hand, when the fixture 35 (bolt) is loosened, the tip of the fixture 35 (bolt) is separated from the vertical member 32 c, and the vertical member 32 c can be relatively moved along the center hole of the cylindrical body 34.

  In addition, as shown in FIG. 2, the vertical member 32 c protrudes upward from the upper end of the connecting portion 33 by at least the protrusion height Ha. The upper end of the connecting portion 33 is installed at the same height as the lower edge of the burrs 14 and the upper edge of the peripheral wall portion 12. Calculated from the vertical dimension Hr of the burrs 14, the vertical member 32 c protrudes upward by a first predetermined dimension (Ha−Hr) from the upper edge of the burrs 14 that becomes the upper edge of the pile head processing bucket 10. The lower surface of the lateral member 32b is also at a height position away from the upper end of the connecting portion 33 by a protruding height Ha.

  The distance from the upper end of the connecting portion 33 to the lower surface 11d of the bottom wall portion 11 is the vertical dimension Hb. The distance from the lower surface 11d to the lower edge of the peripheral wall portion 12 is the vertical dimension Hc. That is, the vertical dimension of the peripheral wall portion 12 is (Hb + Hc). However, the vertical dimension Hc is much smaller than the vertical dimension Hb (Hc << Hb) or zero.

  The distance from the lateral member 32b to the lower surface 11d is (Ha + Hb). Therefore, when the height position of the lateral member 32b is measured, the height position of the lower surface 11d can be obtained easily and accurately. In the present embodiment, as will be described later, for the purpose of matching the lower edge or lower surface 11d of the peripheral wall portion 12 to the pile head processing target height of the cast-in-place concrete pile, the protruding height Ha so as to satisfy the following Expression 1 or Expression 2 Is set. Although the length Hd below is described in detail later, it is the protruding height of the anchor bar protruding upward from the design top height of the cast-in-place concrete pile.

  (Formula 1) Ha + Hb ≦ Hd

  (Formula 2) Ha + Hb + Hc ≦ Hd

  The outer diameter dimension Db of the pile head processing bucket 10 is equal to the outer diameter dimension of the peripheral wall portion 12. As an optimal shape of the pile head processing bucket 10, the vertical dimension (Hr + Hb + Hc) of the pile head processing bucket 10 is included in the range of the outer diameter dimension Db from one quarter to one quarter. In short, the outer diameter dimension Db of the pile head processing bucket 10 main body excluding the center connecting portion 18 is larger than the vertical dimension (Hr + Hb + Hc). If the vertical dimension (Hr + Hb + Hc) is made smaller than the outer diameter dimension Db, the extra concrete can be taken into the peripheral wall portion 12 from the upper edge opening of the pile head processing bucket 10 when the extra concrete is particularly large.

  Pile head processing using a pile head processing bucket will be described.

  First, a surface layer casing is erected on the ground, and a pile hole is created in the ground from the center hole of the surface layer casing using an earth drill. Next, set the reinforcing bar in the hole. Next, the ready-mixed concrete is transported to the bottom of the pile hole, and the concrete is launched from the bottom of the pile hole to the top of the pile hole. This builds a reinforced concrete pile on site. Drawing 7 is an explanatory view showing typically the state where the pile head of the reinforced concrete pile was seen from the side. The ready-mixed concrete is placed upward beyond the design top height T of the reinforced concrete pile. The anchor bar 103 of the reinforcing bar rod 102 is a vertical bar extending in the vertical direction, and protrudes upward from the design top end height T by a predetermined protrusion height Hd. Above the designed ceiling height T, extra concrete S is stored in the surface casing 105.

  The center connecting portion 18 of the pile head processing bucket 10 is connected to the lower end of the kelly bar 101 and is carried into the reinforcing bar 102 from the upper end of the surface casing 105. When the bottom wall portion 11 of the pile head processing bucket 10 is pressed against the surplus concrete S with the kelly bar 101, each lid member 17 is pushed up to the open position.

  When the kelly bar 101 is rotated while the bottom wall 11 is pressed against the extra concrete S, the pile head processing bucket 10 rotates counterclockwise as indicated by an arrow R in FIG. Then, as shown in FIG. 6, the lid member 17 is lifted upward by the pressure of the extra-concrete concrete S to be in the open position, and the extra-concrete concrete S passes through the intake port 13 as indicated by a thick arrow and is pile head processed It is taken into the bucket 10 (FIG. 7). Regarding the circumferential direction of the peripheral wall portion 12, an arrow R is a direction crossing the intake port 13 from the other circumferential edge 13n to the circumferential one edge 13m.

  As shown in FIGS. 5 and 6, the bottom wall portion 11 is provided with an inclined surface 11c adjacent to the other circumferential edge 13n. The inclined surface 11c is upward, and is formed in a certain climbing gradient that increases as the distance from the other circumferential edge 13n of the intake port 13 increases to the other circumferential direction. For this reason, the other edge 13n in the circumferential direction is formed at the edge, and the surplus concrete S is cut so as to be scooped with a knife. An inclined member 11e is fixed to the flat surface 11b occupying most of the upper surface of the bottom wall portion 11. The inclined member 11e forms part of the inclined surface 11c. As a result, the inclined surface 11 c extends upward beyond the flat surface 11 b of the bottom wall portion 11.

  The pile head processing bucket 10 is gradually pushed down while rotating to take in uncured surplus concrete S, and the lower end (or lower surface 11d) of the pile head processing bucket 10 is positioned slightly above the design top end height T. When the head processing target height Y is reached, the removal of surplus concrete is completed. FIG. 8 is a longitudinal sectional view showing the completion of the pile head processing by the pile head processing bucket.

  As shown in FIG. 8, when the lower surface of the lateral member 32 b of the pile head processing bucket height position indicator 31 comes into contact with the upper end of the anchor bar 103, the lower edge of the pile head processing bucket 10 is the pile head processing target height. Matches Y. The reason for this is to fix the vertical member 32c at the connecting portion 33 so that the protrusion height Ha (FIG. 2) of the pile head processing bucket height position indicator 31 satisfies Expression 3.

  (Formula 3) Ha <Hd-Hb-Hc

  Since the vertical dimensions Hb and Hc are values inherent to the pile head processing bucket 10 and the protrusion height Hd is a value determined for each cast-in-place concrete pile, Hb, Hc and Hd cannot be adjusted. On the other hand, the protrusion height Ha can be adjusted by operating the connecting portion 33. According to the pile head processing bucket height position indicator 31 of this embodiment, even if the protrusion height Hd of the anchor bar 103 is different for each construction site, the common pile head processing bucket 10 can be used, The lower edge of the pile head processing bucket 10 can be correctly aligned with the pile head processing target height Y.

  Since the surplus concrete S is stored in the surface casing 105 and the pile head treatment bucket 10 is immersed in the surplus concrete S or is submerged in the surplus concrete S, the worker can treat the pile head. It is difficult to accurately recognize the height of the bucket 10. In addition, since there is a reinforcing bar 102 and it is narrow, it is dangerous for an operator to enter the surface casing 105.

  According to the pile head processing bucket height position indicator 31 of this embodiment, an operator can visually recognize the height position of the pile head processing bucket 10 simply and accurately using the lateral member 32b as a mark. As shown in FIG. 8, the pile head processing bucket 10 is accurately set to the pile head processing target height Y by the pile head processing bucket height position indicator 31.

  Moreover, according to the pile head processing bucket height position indicator 31 of this embodiment, when the horizontal member 32b contacts the upper end of the anchor bar 103, the pile head processing is automatically performed up to the pile head processing target height Y. Therefore, construction management becomes very easy. In addition, it is possible to reduce the overfilling of concrete. In particular, when the protrusion height Ha (FIG. 2) satisfies the expression 4, the pile head processing target height Y coincides with the design top edge height T, and the overfill concrete is not dropped.

  (Formula 4) Ha = Hd-Hb-Hc

  Moreover, according to the pile head processing bucket height position indicator 31 of this embodiment, since the up-down direction member 32c is temporarily fixed with the fixing tool 35, an unreasonable external force acts on the horizontal direction member 32b by any chance during construction work. Even so, the fixture 35 is loosened, and the vertical member 32 c moves relative to the connecting portion 33 or rotates within the cylindrical body 34. Therefore, damage to the pile head processing bucket height position indicator 31 can be prevented.

  When the lower edge of the pile head processing bucket 10 reaches the pile head processing target height Y, the kelly bar 101 is then lifted to carry the pile head processing bucket 10 out of the pile head. At this time, since the lid member 17 automatically returns to the closed position, the extra concrete S does not fall from the intake port 13 when being carried out.

  FIG. 9 is a longitudinal cross-sectional view showing the displacement of the bottom wall portion, where the normal position of the bottom wall portion is indicated by a virtual line, and the release position of the bottom wall portion is indicated by a solid line. The lock mechanism 21 for holding the bottom wall portion 11 in the normal position includes an operation element 23, a lock 24, and an operation rod 25. The operating element 23 is provided on the upper side of the beam 16 (FIG. 1). The lock 24 is provided at a position away from the rotation shaft 20 in the bottom wall portion 11. The operating rod 25 extends vertically from the operating element 23 to the lock 24, the upper end portion of the operating rod 25 penetrates the beam 16, and the lower end portion of the operating rod 25 is bent into, for example, an L shape and engaged with the lock 24. To do. As a result, the bottom wall 11 is suspended from the beam 16 and maintained in the normal position.

  The operation element 23 can be rotated around the operation rod 25. When the operator rotates the operation element 23, the operation rod 25 coupled to the operation element 23 also rotates, and the engagement between the operation rod 25 and the lock 24 is released. As a result, the bottom wall portion 11 is rotated downward to the release position as shown by a solid line in FIG. 9, and the surplus concrete inside the pile head processing bucket 10 is discharged downward.

  FIG. 10 is an overall view showing a pile head processing bucket height position indicator 41 according to another embodiment of the present invention, and shows a state where the pile head processing bucket 10 is detached from the above-described pile head processing bucket 10. Regarding the other embodiments, the same reference numerals are given to the configurations common to the above-described embodiments, and the description thereof will be omitted, and different configurations will be described below. In another embodiment, the cylindrical member 34 is provided with a clamp member 36. The clamp member 36 can be connected to any position of the pile head processing bucket 10 (FIG. 1), for example, the beam 16, and can be detached from the beam 16 as needed. That is, the connecting portion 33 is detachably attached and fixed to the pile head processing bucket 10.

  As described above, the pile head processing bucket height position indicators 31 and 41 of the present invention are instruments for the pile head processing bucket 10 inserted into the pile hole of the cast-in-place concrete pile. Assumption. The pile head processing bucket height position indicators 31 and 41 extend in the horizontal direction from the upper and lower direction members 32c extending in the vertical direction and projecting upward from the pile head processing bucket 10 and the upper end side portion of the vertical direction member 32c. A lateral member 32b that protrudes outward from the pile head processing bucket 10 and is raised from the upper edge of the pile head processing bucket 10 by a first predetermined dimension (Ha-Hr), a lower end side portion of the vertical member 32c, and a pile head And a connecting portion 33 that connects the processing buckets 10. The pile head processing bucket height position indicators 31 and 41 are arranged so that the lateral member 32b comes into contact with the upper end of the anchor bar 103 protruding upward from the design top end height T of the cast-in-place concrete pile. 10 indicates that the height position of the lower edge is a pile head processing target height Y that is lower than the upper end of the anchor bar 103 by the second predetermined dimension (Ha + Hb + Hc).

  According to the pile head processing bucket height position indicators 31 and 41, the lower edge or the lower surface 11d of the pile head processing bucket 10 can be made coincident with the pile head processing target height Y simply, quickly and accurately. The work efficiency of pile head processing is improved. And the pile head processing target height Y can be brought close to the design top end height T, so that the overfill concrete can be omitted as much as possible. The vertical dimension Hc may be 0, or may be ignored as being substantially 0. This is because the vertical dimension Hc is extremely smaller than the protrusion height Ha and the vertical dimension Hb. As a modification, the second predetermined dimension may be (Ha + Hb).

  Further, as shown in FIG. 2, the connecting portion 33 of the pile head processing bucket height position indicators 31 and 41 is fixed to the pile head processing bucket 10, and the lower end portion of the vertical member 32 c cannot move in the horizontal direction and moves in the vertical direction. It includes a cylindrical body 34 as a guide portion that can be guided, and a fixture 35 (bolt and female screw hole) that holds the lower end portion of the vertical member 32c so as to prohibit the vertical movement of the vertical member 32c. Thereby, protrusion height Ha can be adjusted and the height of the up-down direction member 32c seen from the pile head processing bucket 10 can be changed. Therefore, a plurality of types of cast-in-place concrete piles having different protrusion heights Hd of the anchor bars 103 can be handled. The fixture 35 is provided on the cylindrical body 34.

  The vertical member 32c extends straight in the vertical direction, and the cylindrical body 34 as a cylindrical guide portion is a cylinder that receives the vertical member 32c. Further, at least the lower end region of the vertical member 32 c is a round pipe or a solid round bar, and is inserted through the cylindrical body 34. Thereby, the protrusion height Ha can be easily adjusted.

  As shown in FIG. 10, the lateral member 32b and the vertical member 32c constitute an inverted L-shaped bar 32 that is integrally formed by bending or welding. As a result, the pile head processing bucket height position indicator can have a simple structure, which is advantageous in terms of cost.

  Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention. The pile head processing bucket is not limited to the form attached to the lower end of the kelly bar 101 as shown in FIG. 7, but may be a form suspended from above by a wire rope or the like. It may be in the form of being installed.

  The pile head processing bucket height position indicator which becomes this invention is utilized advantageously in civil engineering construction.

10 pile head processing bucket, 11 bottom wall, 11b flat surface,
11c inclined surface, 11d lower surface, 11e inclined member,
12 peripheral wall part, 13 inlet, 13m one circumferential edge,
13n circumferential direction other edge, 13p top edge, 13q outer edge,
14 burrs, 15 central part, 16 beams,
17 lid member, 18 center connecting part, 19 axis,
19b bolt, 19n nut, 26 bottom wall side protrusion,
26h long hole, 27 lid side protrusion,
31 Pile head processing bucket height position indicator, 32 bars,
32b lateral member, 32c vertical member, 33 connecting part,
34 Cylinder, 35 Fixing tool, 36 Clamp member,
101 Kelly bar, 102 Rebar rod, 103 Anchor bar,
105 surface casing, S surplus concrete,
T Design top edge height, Y Pile head processing target height.

Claims (5)

An instrument for a pile head treatment bucket inserted into a pile hole of a cast-in-place concrete pile,
A vertical member protruding upward from the pile head processing bucket;
A lateral member extending in a lateral direction from an upper end side portion of the vertical member and projecting to an outer diameter side from the pile head processing bucket, and being increased by a first predetermined dimension from an upper edge of the pile head processing bucket;
A lower end side portion of the vertical member and a connecting portion for connecting the pile head processing bucket,
The horizontal member is positioned at the same height as the upper end of the anchor bar protruding upward from the design top end height of the cast-in-place concrete pile, so that the height position of the lower edge of the pile head processing bucket is the anchor. A pile head processing bucket height position indicator that indicates that the height position is lower than the upper end of the line by a second predetermined dimension. The connecting portion is
A guide portion that is fixed to the pile head processing bucket and guides the lower end portion of the vertical member so that it cannot move in the horizontal direction and can move in the vertical direction;
The pile head processing bucket height position indicator of Claim 1 including the fixture which hold | maintains the lower end part of the said up-down direction member so that the said up-down direction movement is prohibited. The vertical member extends straight in the vertical direction,
The pile head processing bucket height position indicator according to claim 2, wherein the guide portion is a groove or a tube that receives the vertical member. At least the lower end region of the vertical member is a round pipe or a solid round bar,
The pile head processing bucket height position indicator according to claim 3, wherein the guide portion includes a cylindrical body through which the lower end region is inserted.   The pile head processing bucket height position indicator according to any one of claims 1 to 4, wherein the lateral member and the vertical member constitute an inverted L-shaped bar formed integrally.

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