JP5996922B2 - Pile hole filling device - Google Patents

Description

This invention relates to drilling Kuiana relates adopted winding device Kuiana filler used to retrieve the ground as a sample of each layer of pile hole filling, such as a layer or cement milk layer of soil cement cement in pile hole.

  Pile hole filling is performed by injecting cement milk into the water or drilling mud used during excavation and replacing the pile hole residue to form a cement milk layer, or stirring and mixing with the pile hole residue to make soil cement. Was formed, and the ready-made piles were buried. In addition, due to recent demands for high bearing capacity, strengthening of cement milk between ready-made piles and pile holes has been sought along with the effects of ready-made piles.

  Accordingly, it has been required to actually collect a sample from the inside of the pile hole, solidify it on the ground, and perform a strength test to confirm the strength. In particular, the strength in the vicinity of the supporting ground, that is, the vicinity of the pile hole bottom (root consolidation part) is important, and the pile hole bottom may reach about 70 m from the ground.

  Therefore, in this case, the collection device for the filling material in the pile hole is lowered and collected in the pile hole. As a sampling device, for example, a hopper provided with an inner window is covered with an outer frame provided with an outer window, the inner window and the outer window are aligned, the pile hole filling is taken into the hopper, and the inner window and the outer window are It has been devised to block the hopper by shifting (Patent Document 1).

JP 2001-73360 A

  In the case of the conventional sampling device, there is no risk of erroneously collecting the pile hole filling in the middle, and the hopper was reliably sealed substantially even after sampling, and the desired pile hole filling could be pulled up to the ground. However, when the sampling device is in contact with the pile hole wall or mud in the pile hole in a clayey formation, there is a risk of soil adhering to the edge of the outer window, in which case the soil is taken into the hopper. There is a problem that the solidification may occur as it is.

  In this invention, since the pile hole filling material is injected into the collection intake chamber having the intake port and the pile hole filling material is accommodated in the collection tank after that, the above problems are solved.

That is, the present invention is a pile hole filling sampling device characterized in that it is used by being attached to the lower end of a drilling rod provided with a water injection pipe in a hollow portion and configured as follows .
(1) A lower end of the cylindrical base disposed in the vertical direction is connected to a lower end of the excavation rod, or a connection portion that can be detachably connected to the excavation rod is formed.
(2) in the middle portion in the longitudinal direction of the tubular body, and attach the separator provided with a communication hole, divided into an upper portion of sampling acquisition chamber and a lower collection tank.
(3) The side wall of the cylindrical base body opens an intake port at a height position of the collection intake chamber, and the lower edge of the water injection pipe faces the collection intake chamber.
(4) A main obturator is disposed so as to be movable up and down across the communication hole, and the main obturator is configured by connecting an upper plug body and a lower plug body that can block the communication hole.
(5) The lower end of the operation rod arranged from the ground through the water injection pipe is connected to the upper end of the main closure.

Moreover, in the above, it is the collection apparatus of the pile hole filling characterized by being comprised as follows.
(1) With the upper plug of the main obturator closing the communication hole of the separator, the auxiliary obturator capable of closing the intake port is connected to the operation rod or the main obturator.
(2) The auxiliary obturator opens all or part of the intake port in a state where the plugs of the main obturator do not block the connecting hole in conjunction with the elevation of the main obturator. It is configured to be positioned at a height to be

Moreover, in the above, it is the collection apparatus of the pile hole filling characterized by being comprised as follows.
(1) A sampling base is formed by combining a cylindrical base attached to the lower end of the excavation rod and a receiver for receiving the cylindrical base removed from the excavation rod on the ground.
(2) A locking portion projecting in the radial direction is formed on the cylindrical base body, and an outlet for taking out the contents is provided at the bottom of the cylindrical base body.
(3) The receiver includes a receiving portion that is locked to the locking portion of the cylindrical base and restricts the cylindrical lowering, and a support that holds the receiving portion in a predetermined position.
Furthermore, in the above, the pile hole filling sampling device is configured as follows.
(1) A stopper that restricts the relative lowering of the main closing tool was provided on the cylindrical base body after the pile hole filling was completed and locked to the operation rod of the main closing tool.

In the present invention, since the liquid can be injected into the collection intake chamber facing the intake port with the collection tank closed, even if clay or the like adheres to the edge of the intake port, this can be removed. There is no risk of taking it into the collection tank. Therefore, there is an effect that the pile hole filling having a desired depth can be reliably collected on the ground, and the solidification strength of the pile hole filling can be accurately estimated.

In the sampling device of Embodiment 1 of this invention, (a)-(d) is the schematic longitudinal cross-sectional view explaining the sampling method. It is the longitudinal cross-sectional view which showed the state which is taking out the extract | collected pile hole filling with the extractor of Embodiment 1 of this invention. (A)-(c) is the schematic longitudinal cross-sectional view explaining the collection method by the collection device of Embodiment 2 of this invention. In the sampling device of Embodiment 3 of this invention, (a) is a longitudinal cross-sectional view of a cylindrical base | substrate, (c) is a front view of a main obturator. (A)-(c) is a front view explaining the collection method using the collection device of Embodiment 3 of this invention. In the collection device of Embodiment 4 of the present invention, (a) is a front view before collection, (b) is a side view before collection, (c) is a front view during collection, (d) (e) (f) These are the front views which broke only the cylindrical base | substrate of (a) (b) (c), respectively. Similarly, in the collection device of the actual condition 4, (a) is a front view of completion of collection, (b) is a front view of a state where unconsolidated use is taken out on the ground, and (c) and (d) are respectively (a) It is the front view which fractured the cylindrical base | substrate of (b). Similarly, in the sampling device of Embodiment 4, a state in which the holders are combined is shown, (a) is a perspective view, (b) is a front view in a mounted state, and (b) is a front view in a state in which an outlet is opened. . Similarly, it is the front view which broke the cylindrical base | substrate with the other sampling device of Embodiment 4, (a) Before sampling with the sampling device of Embodiment 4, (b) is before sampling in other embodiments, (c) is In another embodiment, it represents after completion of collection. Similarly, it is the front view which broke the cylindrical base | substrate with the other sampling device of Embodiment 4, (a) is before collection | recovery, (b) is in the middle of another collection, (c) represents after completion of collection.

1. Configuration of sampling device 40 of Embodiment 1

(1) On the inner surface of the intermediate portion of the cylindrical substrate 1, a separator plate 6 for vertically partitioning the inside of the cylindrical substrate 1 is fixed, and the upper portion of the separator plate 6 is set as a sampling intake chamber 11 and the lower portion is set as a sampling tank 12 To do. A communication hole 7 is formed in the central portion of the separator plate 6 to allow the collection / acquisition chamber 11 and the collection tank 12 to communicate with each other. On the peripheral surface of the communication hole 7, an inclined surface is formed downward so that the lower surface 9 side of the separator 6 has a larger diameter than the upper surface 8 side.

An opening is formed in the side wall of the cylindrical base body 1 at a predetermined height H ₁ above the separator plate 6, and the inlets 13 are formed. Four intake ports 13 are provided at equal intervals in the circumferential direction, and communicate with the inside and outside of the cylindrical substrate 1.

  An upper lid 5 is provided at the upper end portion of the cylindrical base 1, and a convex coupling portion (connected portion) 2 that can be coupled to the concave coupling portion (coupling portion) 52 of the excavation rod 51 is formed on the upper lid 5. The concave connection portion 52 is formed with a water injection pipe 53 for supplying cement milk and drilling fluid (water, etc.) from the ground to the lower end of the excavation rod 51, and the convex connection portion 2 is connected to the water injection pipe 53. A pipe portion 3 that can communicate with each other is disposed. The lower end 4 of the pipe portion 3 is located above or near the intake port 13.

  An opening is formed in the center of the bottom plate 15 of the cylindrical base 1, and a lower cover plate that can be attached to and detached from the bottom plate 15 on the lower surface of the bottom plate 15 and closes the outlet 16 as an outlet 16 for the collected pile hole filling. A lower end projection 17 having 18 is attached. The lower end protrusion 17 is configured by fixing a protrusion 19 on the lower surface of the lower lid plate 18.

(2) An upper plug 22 that can close the communication hole 7 from the upper surface 8 side of the separator 6 is disposed above the separator 6. A lower plug body 23 that can close the communication hole 7 from the lower surface 9 side of the separator plate 6 is disposed below the separator plate 6. An upper surface of the lower surface and Shitasentai 23 Uesentai 22 and connected by a connecting rod 14 of length L _1, and the main closing member 21.

  From the ground, the operation rod 31 is inserted into the water injection pipe 53 and the pipe portion 3, and the lower end of the operation rod 31 is connected to the upper surface of the upper plug body 22 of the main closing tool 21.

  The cylindrical base body 1 is formed with an inner small diameter portion (thick portion) 26 from the position where the upper plug 22 closes the communication hole 7 to the position directly below the intake port 13. 26, even if the outer peripheral surface of the upper plug 22 is in close contact with the inner wall of the cylindrical base 1 and the intake ports 13 and 13 are opened, the collection intake chamber 11 and the collection tank 12 do not communicate with each other. The collection tank 12 is substantially sealed.

  Further, the lower plug body 23 is formed with a small diameter on the upper surface side and a large diameter on the lower surface side, and the peripheral surface is formed with an inclined surface facing upward so that it can be in close contact with the peripheral surface of the communication hole 7.

(3) Above the main closure 21, a closure cylinder (auxiliary closure) 28 is slidably slidable within the cylindrical base 1. The distance to the lower surface of the closing cylinder 28 from the lower surface of Uesentai 22 and L _2, the height of the closing cylinder 28 to L _3. The closing cylinder 28 is arranged at a position where the closing cylinder 28 closes the intake ports 13, 13 with the upper plug 22 of the main closing tool 21 closing the communication hole 7. Further, the closing tube 28 does not block the communication hole 7 in the upper plug body 22 and the lower plug body 23, and opens a part or all of the intake ports 13 and 13 in a state where the communication hole 7 is opened. Arranged to be. The closing cylinder 28 is fixed to the operation rod 31 so that this positional relationship can be maintained. The closing cylinder 28 and the operation rod 31 are fixed, for example, by fixing rod members 29 and 29 in the diametrical direction to the closing cylinder 28 and fixing the rod material 29 and the operation rod 31 (FIG. 1A).

(4) The collection device 40 is configured as described above (FIG. 1).

(5) Other Embodiments In the above description, the convex coupling portion 2 is formed so as to be coupled to the concave coupling portion 52 of the excavation rod 51. However, the cylindrical base body 1 can be directly fixed to the excavation rod 51 (see FIG. Not shown).
In the above description, the lower end 4 of the pipe portion 3 is formed downward, but it can also be formed in the lateral direction, for example, toward the edge of the intake port 13, particularly toward the upper edge (not shown). . Moreover, the lower end part of the pipe part 3 can be branched and many lower ends 4 can also be formed (not shown).

2. Method for collecting pile hole filling of embodiment 1 (use of collection device 40)

(1) The excavation of a predetermined pile hole is completed, cement milk is injected into the pile hole, a cement milk layer is formed at the lower end of the pile hole, and a soil cement layer is formed above (not shown) ).
Subsequently, the convex connecting portion 2 of the sampling device 40 is connected to the concave connecting portion 52 of the excavating rod 51, and the sampling device 40 is lowered to the pile hole sampling position (here, near the pile hole bottom). At this time, the lower surface of the upper plug 22 of the main closing tool 21 closes the communication hole 7 and the closing cylinder 28 closes the intake ports 13 and 13 (FIG. 1A).
In this state, since the intake ports 13 and 13 are closed by the closing cylinder 28, the pile hole filling is not taken into the cylindrical substrate 1 from the intake ports 13 and 13. In addition, in this case, when the clay-like lump remains in the pile-hole filling without stirring, when it contacts the clay-like pile hole wall, rarely at the edge of the intake ports 13 and 13, The clay may adhere.

(2) In the pile hole, the operation rod 31 is raised at a depth to be collected or in the vicinity thereof (usually slightly above the depth to be collected), and the upper plug 22 of the main closure 21 is It is located near the upper end of the inner small diameter portion 26 (FIG. 1B). In this state, the pile hole filling material passes through the intake ports 13 and 13 and enters the collection intake chamber 11, but the upper plug 22 is in close contact with the peripheral surface of the inner small diameter portion 26. The collection tank 12 is empty.
In this state, high-pressure washing water is jetted from the lower end 4 of the pipe portion 3 toward the edge of the intake port 13 to wash away mud deposits near the edge of the intake port 13. The washing water is preferably a cement milk concentration equivalent to the cement milk concentration of the pile hole filling to be collected (concentration of the cement milk component of the soil cement), but does not affect the solidification strength in the pile hole. Water, muddy water, soil cement, etc. can also be used.

(3) With the intake 6 opened (FIG. 1 (b)), the excavating rod 51 is rotated, the sampling device 40 is rotated, and the influence of the sprayed washing water is reduced. Blend with the surrounding pile hole filling. Therefore, in this state, the pile hole filling at the expected collection depth and the pile hole filling in the collection intake chamber 11 have substantially the same contents.

(4) Subsequently, when the sampling device 40 is at the sampling position, the sampling device 40 is moved to that position, and when the sampling device is separated, it is moved to the sampling position, and the operation rod 31 is raised again, and the main obturator 21 is positioned above the inner small diameter portion 26, a gap is formed between the peripheral edge of the upper plug body 22 and the inner wall of the tubular base 1, and the upper plug body 22 is further taken in the inlet 13. , 13 is moved further upward (FIG. 1 (c)), and the pile hole filling part is passed through the intakes 13, 13, the inner small diameter part 26, and the communication hole 7, into the collection tank 12. take in.

(5) When a predetermined amount of time has passed and the required amount of pile hole filling has been accommodated in the tank, the operating rod 31 is further raised so that the lower plug body 23 of the main closing tool 21 and the communication hole 7 are moved downward. Are inserted into the communication holes 7 to close the communication holes 7 (FIG. 1D).

(6) Subsequently, the state in which the communication hole 7 is closed with the lower plug body 23 of the main closing tool 21 is maintained (FIG. 1D), and the sampling device 40 is pulled up together with the excavating rod 51 to the ground. If the lower end protrusion 17 is removed from the cylindrical base 1 on the ground, the pile hole filling in the collection tank 12 is taken out from the outlet 16 of the bottom plate 15 of the cylindrical base 1 (FIG. 2). The taken out pile hole filling is put into a mold for making a test piece and cured and solidified (not shown).

3. Collection device 40 and collection method of embodiment 2

(1) In the first embodiment, the closing cylinder (auxiliary closing device) 28 is used. However, this embodiment 2 is an embodiment in which the closing cylinder 28 is omitted, and the inner small-diameter portion 26 is also omitted. A gap is formed between the outer periphery of 22 and the inner surface of the cylindrical substrate 1 (FIG. 3A). Other configurations are the same as those in the above embodiment. As described above, the collection device 40 is configured (FIG. 3).

(2) Next, a sampling method using the sampling device 40 will be described. Similar to the above embodiment, the convex connecting portion 2 of the sampling device 40 is connected to the concave connecting portion 52 of the excavating rod 51, and the sampling device 40 is lowered to the pile hole sampling position (here, near the bottom of the pile hole). Let At this time, since the lower surface of the upper plug 22 of the main closure 21 closes the communication hole 7 (FIG. 3A), the pile hole filling from the intake ports 13, 13 enters the cylindrical substrate 1. Even if it is taken in, it does not enter the collection tank 12 from the communication hole 7.

  Maintaining the sampling device 40 to remain in this state, the sampling device is lowered to the vicinity of the sampling depth (FIG. 3A). At this position, high-pressure washing water is jetted from the lower end 4 of the pipe portion 3 toward the edges of the intake ports 13 and 13, and adheres at mud and other depths near the edges of the intake ports 13 and 13. Wash away any dirt cement or other deposits.

  In this state (FIG. 3 (a)), the excavating rod 51 is rotated / lifted / lowered as necessary, and the sampling device 40 is rotated / lifted / lowered to reduce the influence of the sprayed washing water. It can also be blended with the pile hole filling around the pile hole. Therefore, in this state, it is desirable that the pile hole filling at the depth to be collected and the pile hole filling in the collection intake chamber have substantially the same contents. In addition, the cleaning process can be performed at a position other than the position (depth) scheduled to be collected. In this case, after the cleaning process is completed, the cleaning process is performed and the following process is performed. Do.

  Subsequently, at a predetermined sampling position, the operation rod 51 is raised so that the upper plug body 22 of the main closure 21 is positioned upward, and between the peripheral edge of the upper plug body 22 and the inner wall of the tubular base body 1. A gap is formed (FIG. 3B), and the pile hole filling part is taken into the collection tank 12 through the intakes 13 and 13 and the communication hole 7. When a predetermined amount of time has passed and a required amount of pile hole filling has been accommodated in the collection tank 12, the operation rod 31 is further lifted so that the lower plug body 23 of the main closing tool 21 is moved from below the communication hole 7. The communication hole 7 is inserted into the communication hole 7 to close the communication hole 7 (FIG. 3C).

  Subsequently, the state in which the communication hole 7 is closed with the lower plug body 23 of the main closing tool 21 is maintained (FIG. 3C), and the sampling device 40 is pulled up together with the excavating rod 51 to the ground. If the lower end protrusion 17 is removed from the cylindrical base 1 on the ground, the pile hole filling in the collection tank 12 can be taken out from the outlet 16 of the bottom plate 15 of the cylindrical base 1 (see FIG. 2).

4). Collection device 40 and collection method of embodiment 3

(1) This embodiment is an embodiment in which the closing cylinder 28 of the second embodiment is not used, and a guide cylinder 33 is provided on the upper surface of the lower cover plate 18 of the tip protrusion 17 so that the guide cylinder 33 is attached to the bottom plate 15. This is an embodiment fitted into the outlet 16. A U-shaped notch 34 is formed in the guide tube 33 from the upper edge. In addition, the communication hole 7 of the separator 6 is formed with a tapered upper and lower edge instead of a slope.
Further, the upper plug body 22 of the main closing tool 21 is formed in a tapered shape with the lower part having a small diameter, and the upper part of the lower plug body 23 is formed in a tapered shape with a small diameter. Moreover, the main obturator 21 forms the protrusion part 25 in the upper surface of the upper plug body 22, and connects the lower end of the operation rod 31 to the protrusion part 25 rotatably (FIG.4 (b)). As described above, the collection device 40 is configured (FIG. 5A).

(2) Next, about the collection method using this collection device 40, the steps other than taking out the collected pile hole filling on the ground are the same as in the case of the second embodiment.

  That is, similarly to the first embodiment, the convex connecting portion 2 of the sampling device 40 is connected to the concave connecting portion 52 of the excavating rod 51, and the sampling device 40 is lowered to the sampling position of the pile hole. At this time, since the lower surface of the upper plug 22 of the main closing tool 21 closes the communication hole 7 (FIG. 5A), the pile hole filling from the intake ports 13 and 13 enters the cylindrical base body 1. Even if it is taken in, it does not enter the collection tank 12 from the communication hole 7.

  Maintaining the sampling device 40 in this state, the sampling device is lowered to the vicinity of the sampling depth (FIG. 5A). At this position, high-pressure washing water is jetted from the lower end 4 of the pipe portion 3 toward the edges of the intake ports 13 and 13, and adheres at mud and other depths near the edges of the intake ports 13 and 13. Wash away any dirt cement or other deposits. In this state (FIG. 5 (a)), the excavation rod 51 is rotated / lifted / lowered as necessary, the sampling device 40 is rotated / lifted / lowered, etc. It can also be blended with the pile hole filling around the pile hole. Therefore, in this state, it is desirable that the pile hole filling at the sampling scheduled depth and the pile hole filling in the collection intake chamber 11 have substantially the same contents.

  Subsequently, if necessary, the sampling device 40 is moved, the operating rod 51 is raised at a predetermined sampling position, the upper plug body 22 of the main obturator 21 is positioned upward, and the periphery of the upper plug body 22 is moved. And the inner wall of the cylindrical substrate 1 (FIG. 5 (b)), and the pile hole filling portion is passed through the intakes 13 and 13 and the communication hole 7 to enter the collection tank 12. take in. When a predetermined amount of time has passed and a required amount of pile hole filling has been accommodated in the collection tank 12, the operation rod 31 is further raised to allow the lower plug body of the main closure 21 to communicate from below the communication hole 7. The communication hole 7 is closed by being inserted into the hole 7 (FIG. 5 (c), indicated by a chain line 17).

  Subsequently, the state in which the communication hole 7 is closed with the lower plug body 23 of the main closing tool 21 is maintained (FIG. 5 (c), indicated by a chain line 17), and the sampling device 40 is pulled up together with the excavating rod 51 to the ground. If the lower end protrusion 17 is removed from the cylindrical base body 1 and lowered on the ground, the lower end protrusion 17 slowly descends with the guide cylinder 33 fitted in the outlet 16 of the bottom plate 15 of the cylindrical base body 1. . Moreover, since the pile hole filling in the collection tank 12 flows out from the notch 34 of the guide tube 33, the pile hole filling can be taken out without leaking if various containers are installed in advance along the position of the notch 34. (FIG. 5 (c), solid line 17).

5. Collection device 40 and collection method of embodiment 4

(1) This embodiment is an embodiment in which the closing cylinder 28 is not used (similar to the embodiments 2 and 3), and in the third embodiment, a locking portion 36 is further formed on the cylindrical base 1 and the sampling device 40 is used. In addition, the sampling device 40 is configured by combining a holder for holding the cylindrical base body removed from the excavation rod on the ground.

(2) The upper lid 5 of the cylindrical base body 1 is formed to have a larger diameter than the cylindrical base body 1 and protrudes radially from the side surface of the cylindrical base body 1. (FIG. 6). Further, when the main closing member 21 is housed in the tubular base body 1 on the inner peripheral side of the lower surface of the upper lid 5 of the tubular base body 1, a recess 38 for housing the upper plug 22 of the main closing member 21 is formed (FIG. 6 (d) to (f), FIG. 4 (a)).

  Further, similarly to the third embodiment, the guide tube 33 protrudes from the upper surface of the lower cover plate 18 of the tip protrusion 17, and the guide tube 33 is inserted into the outlet 16 of the bottom plate 15. A U-shaped notch 34 is formed in the guide tube 33 from the upper edge. In addition, the communication hole 7 of the separator 6 is formed with a tapered upper and lower edge instead of a slope.

  Further, the narrow diameter portion 3a is formed at the upper end of the pipe portion 3, and the stopper 57 is attached above the small diameter portion 3a (near the upper surface of the convex coupling portion 2). The stopper 57 takes two positions, a position where the locking edge crosses the small diameter portion 3a and a position where the thin diameter portion 3a is opened, and is biased toward the position crossing the small diameter portion 3a (not shown). Not) It is also possible to omit the urging force (spring, etc.) and manually operate the two positions.

  Further, the upper plug body 22 of the main closing tool 21 is formed in a tapered shape with the lower part having a small diameter, and the upper part of the lower plug body 23 is formed in a tapered shape with a small diameter. Moreover, the main obturator 21 forms the protrusion part 25 in the upper surface of the upper plug body 22, and connects the lower end of the operation rod 31 to the protrusion part 25 rotatably (FIG.4 (b)).

In addition, the operation rod 31 of the main closing tool 21 forms a large diameter portion 31a with a length (height) that includes a range where the small diameter portion 3a is located when it is moved up and down, and the lower end of the large diameter portion 31a. Is a locking edge 32. The locking edge 32 can be locked with the stopper 57 to restrict the movement of the main closing tool 21 descending with respect to the cylindrical main body 1.
A sampling device 40 in which other structures are formed in the same manner as in the first to third embodiments is configured (FIG. 5A).

(3) Moreover, this collection device 40 uses a holder 50.
The holder 50 has a space 49 in the center portion on the base plate 43, and three columns 44, 44 are erected, and a ring-shaped receiving ring is formed on the space 49 side at the upper ends of the columns 44, 44. (Receiver) 45 is fixed. The space 49 has a size that allows the cylindrical base 1 to be accommodated vertically, and fixes the outer peripheral surface of the receiving ring 45 to the inner surfaces of the columns 44 and 44. The inner diameter of the receiving ring 45 is formed such that the cylindrical base 1 can pass through, and the outer diameter is formed larger than the outer diameter of the engaging portion 36 (outer peripheral portion) of the upper cover 5 of the cylindrical base 1. Further, the height from the base plate 43 to the upper edge 46 of the receiving ring 45 is formed at a height H, and is formed at the same height as the upper edge of the column 44. Further, an intermediate ring 47 having the same inner diameter and outer diameter as the receiving ring 45 is fixed to the intermediate height of the support column.

(4) In this collection device 40, it is used similarly to each of the above embodiments 2-3. First, the sampling device 40 is submerged to a predetermined depth (FIGS. 6A, 6B, 6D, and 6E). At this time, the upper end portion of the large-diameter portion 31a of the operation rod 31 of the main closing tool 21 is positioned in the small-diameter portion 3a of the pipe portion 3 (FIGS. 6D and 6E). At this position, at the sampling position (depth), the operating rod 31 is raised, the upper plug body 22 of the main closure 21 is positioned upward, and the peripheral edge of the upper plug body 22 and the inner wall of the cylindrical base body 1 are located. A gap is formed between them (FIGS. 6C and 6F) .In this state, the intermediate portion of the large diameter portion 31a of the operating rod 31 of the main closing tool 21 is positioned at the small diameter portion 3a of the pipe portion 3. (See FIGS. 6C and 6F) (see FIG. 3B).

Further, the pile hole filling part is taken into the collection tank 12 through the intake ports 13 and 13 and the communication hole 7. When a predetermined amount of time has passed and a required amount of pile hole filling has been accommodated in the collection tank 12, the operation rod 31 is further lifted so that the lower plug body 23 of the main closing tool 21 is moved from below the communication hole 7. The communication hole 7 is inserted into the communication hole 7 to close the communication hole 7 (see FIGS. 7A and 7C, see FIG. 3C). In a state where the communication hole 7 is closed, the large diameter portion 31a of the operation rod 31 of the main closing tool 21 protrudes above the small diameter portion 3a of the pipe portion 3, and the locking edge of the stopper 57 is the large diameter portion. The locking edge 32 of 31a is locked.
Subsequently, the state in which the communication hole 7 is closed with the lower plug body 23 of the main closing tool 21 is maintained, and the sampling device 40 is lifted together with the excavating rod 51 to the ground. At this time, since the locking edge of the stopper 57 locks the locking edge 32 of the large-diameter portion 31a, the main closing tool 21 does not descend with respect to the cylindrical base 1, so that the collection tank 12 is sealed. It is maintained and it can prevent that the pile hole filling in the middle by the ground 55 mixes in the collection tank 12.

(5) On the ground 55, the cylindrical base 1 of the sampling device 40 is put into the space 49 of the holder 50 from above, and the lower surface 37 of the locking portion 36 of the upper lid 5 of the cylindrical base 1 is placed on the receiving ring of the holder 50. The sampling device 40 is placed on the holder 50 while being engaged with the upper edge 46 of 45 and the upper edge of the columns 44, 44. Even in this state, since the locking edge of the stopper 57 locks the locking edge 32 of the large-diameter portion 31a, the main closing tool 21 does not descend with respect to the cylindrical base body 1, so that the collection tank 12 is inadvertently lowered. Can be prevented from opening. Further, in this state, the excavation rod 51 is removed from the convex coupling portion 2 (FIGS. 7A and 7C). However, in this state, the holder 50 cannot be moved while being placed on the sampling device 40, so that the removal is performed. The excavation rod 51 can be used for other operations.

(6) Before or after the collection device 40 is placed on the holder 50, the collection container 48 for pile hole filling (unconsolidated sample) is placed on the base plate 43 directly below the collection device 40.
Subsequently, if the lower end protrusion 17 is removed from the cylindrical base 1 of the sampling device 40, the pile hole filling in the sampling tank 12 can be taken out into the sampling container 48 from the outlet 16 of the bottom plate 15 of the cylindrical base 1 ( FIG. 8 (a) (c), FIG. 7 (b)). At this time, since the lower end protrusion 17 is taken out downward and the pile hole filling work is taken out, the height H of the holder 50 is set so that a sufficient space can be secured so as not to hinder the work. ing.

(7) In the above embodiment, the upper lid 5 is formed to have a large diameter and the outer peripheral side of the upper lid 5 is used as the engaging portion 36. However, the protrusions are separately provided radially on the outer peripheral surface of the cylindrical base 1, It can also be set as the locking portion 36 (not shown).
Further, in the above-described embodiment, the structure of the holder 50 may be another structure as long as it has a function of the receiving ring 45 that can hold the collection device 40 at a height H (not shown).

(8) In the above embodiment, since the operating rod 31 is provided with the large-diameter portion 31a, when the other portion (smaller diameter than the large-diameter portion 31a) of the operating rod 31 is located in the small-diameter portion 3a of the pipe portion 3. In addition, there may be a gap (FIG. 9A). In this case, before opening the collection tank 12 (while the collection device 40 is being submerged to a predetermined depth), the pipe portion 3 is moved from the small-diameter portion 3a as indicated by arrows 58 and 58 from the intake port 13. It is also conceivable to move upward (inside the hollow portion of the excavation rod 51).
In order to prevent this, a water-stopping material (columnar shape) that closes the pipe portion 3 at the position of the lower end portion of the pipe portion 3 (a diameter smaller than the large diameter portion 31a) at a position below the large diameter portion 31a of the operation rod 31. 56 can also be attached (FIG. 9B). The water stop material 56 moves up in the pipe portion 3 as the operating rod 31 is lifted (FIG. 9C).

  Moreover, the lower large diameter part 31b which has the height comparable as the height of the water stop material 56 can also be formed below the large diameter part 31 with the operating rod 31 (FIG. 10). In this case, the water stop material (columnar shape) 56 is located at the upper end of the pipe portion 3 (a position where the small diameter portion 3a is closed from directly below), and the operation rod 31 slides in the water stop material 56 while maintaining this position. It moves (FIG. 10 (a)-(c)).

DESCRIPTION OF SYMBOLS 1 Cylindrical base | substrate 2 Convex connection part 3 Pipe part 3a Small diameter part 4 Pipe part lower end 5 Upper cover 6 Separation plate 7 Communication hole 8 Separation plate upper surface 9 Separation plate lower surface 11 Collection intake chamber 12 Collection tank 13 Collection Inlet 15 Bottom plate 16 Take-out port 17 Lower end projection 18 Lower lid plate (lower end projection)
19 Protrusion (lower end protrusion)
21 Main obturator 22 Upper plug (main obturator)
23 Lower plug (main obturator)
24 connecting rod (main closure)
25 Protrusion (main closure)
26 Inner small diameter part (tubular substrate)
28 Block (auxiliary closure)
29 Rod 31 Operation rod 31a Large diameter portion 32 of operation rod Locking edge 33 of operation rod Guide tube 34 Notch (guide tube)
36 Locking portion 37 Lower surface 40 of the locking portion Sampling device 43 Base plate 44 Post 45 Receiving ring (locking portion)
46 Upper edge of receiving ring 48 Sampling container 50 Holding tool 51 Excavation rod 52 Concave connecting portion 53 Water injection pipe 55 Ground 56 Water stop material 57 Stopper

Claims (4)

An apparatus for collecting pile hole filling , which is used by being attached to the lower end of a drilling rod provided with a water injection pipe in a hollow portion and configured as follows .
(1) A lower end of the cylindrical base disposed in the vertical direction is connected to a lower end of the excavation rod, or a connection portion that can be detachably connected to the excavation rod is formed.
(2) in the middle portion in the longitudinal direction of the tubular body, and attach the separator provided with a communication hole, divided into an upper portion of sampling acquisition chamber and a lower collection tank.
(3) The side wall of the cylindrical base body opens an intake port at a height position of the collection intake chamber, and the lower edge of the water injection pipe faces the collection intake chamber.
(4) A main obturator is disposed so as to be movable up and down across the communication hole, and the main obturator is configured by connecting an upper plug body and a lower plug body that can block the communication hole.
(5) The lower end of the operation rod arranged from the ground through the water injection pipe is connected to the upper end of the main closure. Collecting device peg holes packing according to claim 1, characterized in that configured as follows.
(1) With the upper plug of the main obturator closing the communication hole of the separator, the auxiliary obturator capable of closing the intake port is connected to the operation rod or the main obturator.
(2) The auxiliary obturator opens all or part of the intake port in a state where the plugs of the main obturator do not block the connecting hole in conjunction with the elevation of the main obturator. It is configured to be positioned at a height to be Collecting device peg holes packing according to claim 1, characterized in that configured as follows.
(1) A sampling base is formed by combining a cylindrical base attached to the lower end of the excavation rod and a receiver for receiving the cylindrical base removed from the excavation rod on the ground.
(2) A locking portion projecting in the radial direction is formed on the cylindrical base body, and an outlet for taking out the contents is provided at the bottom of the cylindrical base body.
(3) The receiver includes a receiving portion that is locked to the locking portion of the cylindrical base and restricts the cylindrical lowering, and a support that holds the receiving portion in a predetermined position. 3. The pile hole filling device according to claim 2 , wherein the device is configured as follows.
(1) A stopper that restricts the relative lowering of the main closing tool was provided on the cylindrical base body after the pile hole filling was completed and locked to the operation rod of the main closing tool.

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