JP2011080350A - Sampling method and sampling device from pile hole filler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the intrusion of muddy water or the like midway through burial leading to required depth and gather only pile hole fillers at required depth. <P>SOLUTION: An inner plug 20 which can freely move up and down is engaged with and inserted into the interior of a sample container 1 having a sample intake port 13 at its lower end and an outlet 15 at its upper end. A sampling device 40 is constituted by bringing the outer plug 28 which can move up and down to the lower end of the sample container 1 (a). Then the inner plug 20 is positioned at the lower end of the sample container 1, the sample intake port 13 is blocked, and the sampling device 40 is descended in the pile hole 44. The inner plug 20 is ascended at the sampling depth, and only "the pile hole fillers of target depth" are filled from the sample intake port 13 to the interior of the sample container 1 (b). Then the outlet 15 is isolated by the inner plug 20, and the sample intake port 13 is blocked and sealed with an outer plug 26 (c). The sampling device 40 is raised on the ground without intrusion of the pile hole fillers in midstream. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  An object of the present invention is to install a pile hole filled with a fluid filler such as cement milk and soil cement, and collect a part of the filler as a sample from a predetermined depth and position. The present invention relates to a sampling method and a sampling device from a pile hole filling.

  The foundation pile that supports the ground structure is configured by, for example, excavating a pile hole in the ground and burying a ready-made pile in the pile hole. In this case, the bottom of the pile hole is positioned on the support ground, the cemented part of the bottom of the pile hole is filled with cement milk, etc. It was. In this case, recently, the supporting force to be borne by one foundation pile has been increased, and the solidified strength of the root consolidation portion has been demanded, and at the same time, the strength management of the root consolidation portion has become important.

  Conventionally, in order to confirm the strength of the root solidified portion, after the root solidified portion has solidified, a method of collecting the root solidified portion by core boring has been performed. However, if the core is collected, the strength can be confirmed, but by collecting the core, it is considered that the performance of the foundation pile itself from which the core has been collected is reduced, that the core cannot be collected until the solidified part is solidified, There were problems such as high cost for core boring.

  Therefore, if the sample was collected after the root-solidified part was built and before the filler such as cement milk solidified, the above problems could be solved, and the solidification strength could be confirmed accurately in a shorter time.

Therefore, the applicant has proposed a sampling device in which an outer frame is attached to a hopper that accommodates a sample so that the relative position can be changed (Patent Document 1). In this sampling device, the inner window and the outer window of the hopper are matched to collect a sample, and the hopper is sealed with the inner window and the outer window not matching.

JP 2001-73360 A

  In the conventional sampling device, since the hopper is hollow and sinks to the bottom of the pile hole (may exceed 50 m above the ground), a small amount of pile hole filling is in the hopper on the way to the bottom of the pile hole for some reason. There was also a risk of inflow. When there are impurities that flowed in the middle, the filler and impurities collected at a predetermined depth are mixed, and what is actually collected sometimes has a different property from that of the predetermined filler.

  In view of this, the present invention temporarily reduces the volume of the sample container accommodating the “pile hole filling of the desired depth” (as close to zero as possible), and discharges the air and fluid in the sample container to the outside of the accommodating part. Then, since the sample (= “pile hole filling of the desired depth”) is collected in the sample container, the above-mentioned problem has been solved.

That is, the invention of this collection method is a collection method of pile hole filling performed in the following steps.
(1) The sampling device forms a sample inlet for taking in the pile hole filler at one end in the sample container, and an outlet at the other end. The sampling device is inserted into the sample container with a first stopper that slides between the sample inlet and the outlet and can seal the sample inlet or the outlet.
(2) The sample inlet is closed, the first stopper is positioned on the sample inlet side, the volume of the sample container on the sample inlet side is substantially zero, and the sampling device is set in the pile hole To do.
(3) Subsequently, at the predetermined sampling depth, the first stopper is moved to the discharge port side so that the volume on the discharge port side of the sample container is substantially zero, and the sample collection of the sample container is performed. The inlet is opened, and the “pile hole filling of the desired depth” is taken into the sample container from the sample inlet.
(4) Subsequently, the sample inlet or the outlet is substantially sealed with the first stopper, and the sampling device is lifted to the ground.

Another invention of the collection method is a method for collecting pile hole fillings performed in the following steps.
(1) The sampling device forms a sample inlet for taking in the pile hole filler at one end in the sample container, and an outlet at the other end. The sampling device is inserted into the sample container with a first stopper that slides between the sample inlet and the outlet and can seal the sample inlet or the outlet.
(2) The sample inlet is closed, the first stopper is positioned on the sample inlet side, the volume on the sample inlet side of the sample container is made substantially zero, and The sampling device is submerged in the pile hole while taking in a “pile hole filling of another depth”.
(3) Subsequently, the first stopper is moved to the discharge port side at a predetermined sampling depth, and the “pile hole filling of other depth” in the sample container is discharged from the discharge port. At the same time, the sample inlet of the sample container is opened, and the “pile hole filling having a target depth” is taken into the sample container from the sample inlet.
(4) Subsequently, the sample inlet and the outlet are substantially sealed with the first stopper and the second stopper, and the sampling device is lifted to the ground.

Another invention of the collection method is a method for collecting pile hole fillings performed in the following steps.
(1) The sampling device forms a sample inlet for taking in the pile hole filler at one end in the sample container, and an outlet at the other end. The sampling device is provided with a first stopper and a second stopper, and the sample inlet and outlet can be sealed. The sample container is formed so that the volume can be changed to substantially zero or maximum by operating the first stopper and the second stopper.
(2) The sample inlet is closed with the first stopper or the second stopper, the volume of the sample container is made substantially zero, and the sampling device is laid down to the sampling depth in the pile hole.
(3) Subsequently, at the predetermined sampling depth, the sample inlet of the sample container is opened, and the “pile hole filling of the target depth” is taken into the sample container, and the volume of the sample container is set. To fill the “pile hole filling of the desired depth” in the sample container.
(4) Subsequently, the sample inlet and the outlet are substantially sealed with the first stopper and the second stopper, and the sampling device is lifted to the ground.

Moreover, the invention of this collection device is a collection device for pile hole filling, characterized in that it is configured as follows.
(1) Openings are formed at both ends in the sample container, with one opening as the sample inlet and the other as the outlet.
(2) An inner stopper is inserted into the sample container so that the inner stopper can be moved between the sample inlet and the outlet, and the movement of the inner stopper or the sample container is operated from the ground. First operating means is provided.
(3) The inner plug can block either the sample intake port or the discharge port.
Another invention of the collection device is a collection device for pile hole filling, characterized in that it is configured as follows.
(1) Openings are formed in the upper and lower parts of the sample container, with one opening as the sample intake and the other as the discharge.
(2) A first stopper is inserted into the sample container so that the first stopper can be moved between the sample inlet and the outlet, and the movement of the first stopper or the sample container can be performed from the ground. First operating means for operating is provided.
(3) A second stopper that can be moved is provided in the sample container or outside the sample container, and second operation means capable of operating the movement of the second stopper or the sample container from the ground is connected.
(4) The first stopper or the second stopper can block either the sample inlet or the outlet.

Another invention of the collection device is a collection device for pile hole filling, characterized in that it is configured as follows.
(1) Openings are formed in the upper and lower parts of the sample container, with one opening as the sample intake and the other as the discharge.
(2) An inner stopper is inserted into the sample container, the inner stopper is movable between the sample inlet and the outlet, and the movement of the inner stopper or the sample container is operated from the ground. One operating means is provided.
(3) An outer lid is provided on the outer periphery of the sample container so as to be openable and closable, and a second operating means capable of operating the opening and closing of the outer lid from the ground is connected.
(4) The inner plug or the outer lid can block either the sample inlet or the outlet.

Moreover, in the invention of each said sampling device, it can also be set as the sampling device of the pile hole filling characterized by being comprised as follows.
(1) A connecting portion to be connected to the burying rod is formed at the upper end of the sample container, and the burying rod and the connecting portion have a hollow portion that communicates vertically.
(2) The first operation means connects the lower end portion to the first plug and positions the intermediate portion so that the upper end portion can be operated on the ground through the connection portion and the hollow portion of the excavation rod.

  This invention is provided with an inner stopper that slides between the sample inlet and the outlet in the sample container, or an inner stopper that can change the volume of the sample inlet of the sample container from zero to the maximum, A collection device was configured. Therefore, it is possible to remove the muddy water that has entered the sampling device in the middle of embedding to the desired depth, and to collect the pile hole filling having the desired depth.

1A and 1B are diagrams showing components of a sampling device according to Embodiment 1 of the present invention. FIG. 1A shows an outer stopper, FIG. 1B shows a sample container, and FIG. 1C shows an inner stopper. FIG. 2 shows the state of use of the sampling device having FIG. 1 as a component, where (a) shows the state of lowering, (b) shows the sampling state, and (c) shows the sampling end state. FIGS. 3A and 3B are diagrams showing components of the sampling device according to Embodiment 2 of the present invention. FIG. 3A shows a sample container and FIG. 3B shows an inner plug. 4A and 4B show the usage state of the sampling apparatus having the component shown in FIG. 3 according to the second embodiment, where FIG. 4A shows a state of lowering, FIG. 4B shows a sampling state, and FIG. 4C shows a sampling end state. 5A and 5B show components of another sampling apparatus according to Embodiment 2 of the present invention, where FIG. 5A shows a sample container and FIG. 5B shows an inner plug. FIG. 6 shows another sampling device of the second embodiment. In FIG. 5, the sampling device having the component shown in FIG. 5 is in use, (a) in the middle of lowering, (b) in the sampling state, and (c) in sampling. Each end state is represented. FIG. 7 is another sampling device of Example 2, (a) is a sample container, (b) is an inner plug, (c) is a sampling device and a middle plug is in an elevated position, (d) is a sampling device and a middle plug. Represents the lowered position. 8A and 8B show components of the sampling apparatus according to Embodiment 3 of the present invention, where FIG. 8A shows a sample container and FIG. 8B shows an inner plug. FIG. 9 shows the collection device of Example 3, in which the collection device shown in FIG. 8 is in use, (a) in the middle of lowering, (b) in the collection state, and (c) in the collection end state. Respectively. 10A and 10B show components of the sampling device according to Embodiment 4 of the present invention, where FIG. 10A shows an inner plug and an outer plug, and FIG. 10B shows a sample container. FIG. 11 is a sampling device of Example 4, in which the sampling device having FIG. 10 as a component is in use, (a) in the middle of lowering, (b) and (c) in the sampling state, and (d) in FIG. Indicates the end status of collection. FIGS. 12A and 12B are longitudinal sectional views for explaining the outline of the present invention. FIG. 12A shows a state in the middle of lowering, FIGS. 12B and 12C show a sampling state, and FIG. FIGS. 13A and 13B are longitudinal sectional views for explaining the outline of the present invention. FIG. 13A shows a state in the middle of lowering, FIGS. 13B and 13C show a sampling state, and FIG. 13D shows a sampling end state. 14A and 14B show components of another sampling apparatus according to Embodiment 2 of the present invention. FIG. 14A shows a sample container and FIG. 14B shows an inner plug. FIG. 15 shows another sampling device of the second embodiment, in which the sampling device using the components shown in FIG. 14 is in use, (a) is in the middle of lowering, (b) is in the sampling state, and (c) is in sampling. Each end state is represented. 16 (a) and 16 (b) are internal stoppers that are components of another sampling device according to the second embodiment. FIG. 17 is another sampling device of Example 2, in which the sampling device using the inner plug of FIG. 16 (a) is in use, (a) in the middle of lowering, (b) in the sampling state, c) represents the collection end state. FIG. 18 shows another sampling device of Example 2, in which the sampling device using the inner plug of FIG. 16 (b) is in use, (a) in the middle of lowering, (b) in the sampling state, (c ) Represents the collection end state. FIG. 19 shows another sampling device according to the second embodiment, wherein (a) shows the inner stopper in the raised position, and (d) shows the inner stopper in the lowered position. FIG. 20 shows another sampling device of the third embodiment, where (a) shows the inner plug of the component, (b) shows the state of lowering, (c) shows the sampling state, and (d) shows the sampling end state. . FIG. 21 shows a sampling device of Example 5, wherein (a) is a component stopper, (b) is a sample container for the component, (c) is in the middle of lowering, (d) is in the middle of sampling, (e ) Represents the collection end state. FIG. 21 is another sampling device of Example 5, (a) is a component plug, (b) is a sample container of the component, (c) is in the middle of lowering, (d) is in the middle of sampling, (E) represents the collection end state.

1. First embodiment

(1) The sample container 1 is formed in a cylindrical shape having a sample intake port 13 on the upper surface and a discharge port 15 on the lower surface. The sample container 1 is formed by closing the top and bottom of a cylindrical side plate 10 with a top plate 3 and a bottom plate 7. Inside the side plate 10, the inside of the side plate 10 is slid up and down to divide the inside of the sample container 1 into a first space 1 A on the sample inlet 13 side and a second space 1 B on the outlet 15 side. The stopper 20 is inserted. The first space 1A can be varied from substantially zero to the maximum capacity (≈capacity of the sample container 1), and the second space 1B can be varied from the maximum capacity (≈capacity of the sample container 1) to approximately zero.
The inner plug 20 is operated from the ground, from the side approaching the sample inlet 13 (the first space 1A is made substantially zero) to the side approaching the outlet (the capacity of the second space 1B is made substantially zero). It can be moved. The sample container 1 is also configured by being connected to various rods (excavation rods, etc.) so that the pile hole 44 can be moved up and down by operation from the ground.
As described above, the collection device 40 is configured (FIG. 12A).

(2) The sampling device 40 has the inner plug 20 positioned at the upper end, and the pile hole 44 filled with mud or cement milk (pile hole filling) while keeping the capacity of the first space 1A substantially zero. The inside is lowered (FIG. 12A). At this time, since the discharge port 15 is open to the second space 1B, the discharge port 15 may enter the second space.
When reaching a predetermined sampling depth (for example, directly above the pile hole bottom 46), the descent of the sampling device 40 is stopped and the height position is maintained.
Subsequently, when the inner plug 20 is lowered, the volume of the first space 1A expands from substantially zero along with the lowering, and the capacity of the second space 1B decreases accordingly. With this change in capacity (as the capacity of the first space 1A increases, only the pile hole filling (cement milk) at that depth is filled from the sampling port 13 (FIG. 12B).
In the state where the capacity of the second space 1B becomes substantially zero and the capacity of the first space 1A is maximum, the first space 1A is filled only with the pile hole filling at that depth (FIG. 12 (c)). .
Subsequently, the relationship between the inner plug 20 and the sample container 1 is maintained, and the collection device 40 is pulled up to the ground. At this time, since the discharge port 15 is sealed with the inner plug 20, there is no fear that the pile hole filling will leak from the sample inlet 13, but the sample inlet 13 can be plugged. The mechanism for plugging the sample inlet 13 can be operated from the ground and can be provided with a separate operation rod, or can be interlocked in common with the rods for operating the inner plug 20.
If the collection device is raised on the ground, the pile hole filling in the first space 1A is taken out and analyzed by solidifying it.

(3) In the sampling device 40, when the inner plug 20 is moved up and down with a rod, a hole is provided for passing the rod through the sample inlet 13 on the upper surface or through the top plate 3 separately. For example, it is closed with a stopper linked to the rod.
In the above description, the inner plug 20 is lowered at a predetermined depth. However, the sample container 1 can be raised by holding the inner plug 20 in that position. In short, it is sufficient that the relative position between the inner plug 20 and the sample container 1 can be changed.

2. Second embodiment

(1) The sampling device 40 of the second embodiment is such that the sample inlet 13 provided on the upper surface in the first embodiment is the lower surface and the outlet 15 provided on the lower surface is formed on the upper surface. Similarly, an inner plug 20 that slides up and down in the side plate 10 is inserted into the side plate 10. The inner space 20 is divided into a first space 1A (lower side) on the sample inlet 13 side and a second space 1B (upper side) on the outlet 15 side (FIG. 13 (a)). Similarly, the first space 1A can be varied from substantially zero to the maximum capacity (≈capacity of the sample container 1), and the second space 1B can be varied from the maximum capacity (≈capacity of the sample container 1) to approximately zero.

(2) Contrary to the first embodiment, the sampling device 40 positions the inner plug 20 at the lower end and lowers the inside of the pile hole 44 while keeping the capacity of the first space 1A substantially zero. (FIG. 13A). At this time, since the discharge port 15 is open to the second space 1B, the discharge port 15 may enter the second space.
When reaching a predetermined sampling depth (for example, directly above the pile hole bottom 46), the descent of the sampling device 40 is stopped and the height position is maintained.
Subsequently, when the inner plug 20 is raised, the volume of the first space 1A expands from substantially zero with the rise, and the capacity of the second space 1B decreases accordingly. Along with this capacity change (as the capacity of the first space 1A increases, only the pile hole filling (cement milk) of that depth is filled from the sampling port 13 (FIG. 13B). In the state where the capacity of the two spaces 1B becomes substantially zero and the capacity of the first space 1A is the maximum, only the pile hole filling at that depth is filled in the first space 1A (FIG. 13C).
Subsequently, the relationship between the inner plug 20 and the sample container 1 is maintained, and the collection device 40 is pulled up to the ground. At this time, since the discharge port 15 is sealed with the inner plug 20, there is no fear that the pile hole filling will leak from the sample inlet 13, but the sample inlet 13 can be similarly plugged.
In the above description, the inner stopper 20 is raised at a predetermined depth. However, the sample container 1 can be lowered while holding the inner stopper 20 in that position. In short, it is sufficient that the relative position between the inner plug 20 and the sample container 1 can be changed.

3. Removing the pile hole filling

  The process of taking out the pile hole filling in the sample container 1 collected in each of the above embodiments is optional, but the first method is to open an arbitrary opening of the sample container 1 of the collection device 40 and position it below. The sample is transferred to a bucket (analytical container), and then transferred to a mold for the specimen (analytical container), solidified, and subjected to necessary tests such as compressive strength. In the second method, the sampling device 40 taken out on the ground is disassembled, the sample container 1 is removed, or from the opening of the sample container 1, the pile hole filling in the sample container 1 is a slag or pump. In the same way, move to a bucket, and then process in the same way. In the third method, the sampling device 40 taken out on the ground is disassembled, or the sample container 1 is removed, or the sample container 1 is tilted obliquely from the opening of the sample container 1, and the pile hole filling material is removed. Move to bucket and process in the same way.

  An embodiment of the present invention will be described with reference to FIGS. 1, 2, 14 and 15. FIG.

1. Configuration of sampling device 40

(1) The sample container 1 is formed by closing the upper and lower openings of the substantially cylindrical side plate 10 with the top plate 3 and the bottom plate 7 (FIG. 1B). A connecting portion 31 connected to the excavation rod 42 from the ground is provided on the upper surface (outer surface) 4a of the top plate 3 so as to face upward. The upper and lower edges of the side plate 10 are formed with annular ribs 12 and 12a facing inward, and the annular rib 12 is fixed to the inner surface 4 of the top plate 3 and the annular rib 12a is fixed to the inner surface 8 of the bottom plate 7, respectively. Here, a cylinder is used, but a rectangular tube such as a square or a hexagon is also possible.
In addition, a tip sharpened portion 33 for stabilizing the sample container 1 is provided at the center of the bottom surface (outer surface) 8a of the bottom plate 7 so as to be directed downward.
In the top plate 3, through-holes 5, 5 are formed at symmetric positions on the inner peripheral side of the annular rib 12 on the outer peripheral side of the connecting portion 31.
A plurality of openings having a height H ₁ are provided at the lower end of the side plate 10 at the same height, which are designated as sample inlets 13 and 13. In addition, a plurality of openings having a height H ₂ are provided at the same height at the upper end of the side plate 10 to form discharge ports 15 and 15. In addition, auxiliary discharge ports 15 a and 15 a are provided at appropriate positions on the side plate 10 above the discharge port 15. A portion of the side plate 10 between the sample inlets 13 and 13 and the outlets 15 and 15 is defined as a closing portion.

(2) The inner stopper 20 is formed from a disk having a height (thickness) H ₃ having an outer diameter corresponding to the inner diameter of the side plate 10 of the sample container 1. The outer diameter of the inner plug 20 is formed so that the outer peripheral surface of the inner plug 20 and the inner peripheral surface of the side plate 10 are watertight, and the inner plug 20 can slide in the side plate 10.
Moreover, the lower end part of the inner rod 24 (1st operation rod) which operates the up-and-down movement of the inner stopper 20 from the ground is connected to the outer peripheral part of the inner stopper 20. Two inner rods 24, 24 are provided at diametrically symmetric positions, are inserted into the through holes 5, 5 of the top plate 3 of the sample container 1, and are attached to positions where the vertical movement of the inner plug 20 can be operated. In this case, the inner rods 24 are preferably formed so that all the inner rods 24 inserted through the through holes 5 and 5 are parallel to each other. Therefore, the inner rods 24, 24 are arranged along the outer periphery of the inner plug 20.
Further, although at least two inner rods 24 are provided, three or more inner rods 24 may be provided at positions that are symmetric in diameter (not shown). In this case, a necessary number of through holes 5 are provided so as to correspond to the top plate 3 of the sample container 1. This is also possible in the following embodiments.

(3) A short cylindrical outer plug 25 having an inner diameter corresponding to the outer diameter of the sample container 1 is formed, and outer rods 29 and 29 (second operation rods) are attached to the outer periphery of the upper end portion of the outer cylinder 25. A substantially horizontal annular stopper 28 is formed at the lower edge of the outer plug 25 toward the center. The stopper 28 can be formed either separately or by bending the lower end of the outer plug 25. On the center side of the stopper 28, an opening 28 a through which the tip sharp portion 33 of the sample container 1 can pass is formed.
The inner diameter of the outer plug 25 is formed so that the outer plug 25 can be fitted and slid on the lower end portion of the side plate 10. The length (height) of the outer plug 25 is such that the outer plug 25 is fitted to the lower end portion of the side plate 10 from below the sample container 1 and the stopper 28 is in contact with the outer surface 8a of the bottom plate 7. Thus, the outer plug 25 is formed so as to block the sample inlet 13. Further, the length (height) of the outer plug 25 is such that the upper edge of the outer plug 25 is below the sample inlet 13 and the lower edge of the outer plug 25 is located above the lower end of the tip sharpened portion 33. To be formed.

(4) The sample container 1, the inner plug 20, and the outer plug 25 are formed as described above.

(5) The lower ends of the inner rods 24, 24 penetrating the through holes 5, 5 of the top plate 3 are fixed to the inner plug 20, and the inner plug 20 is slidably inserted into the sample container 1. The inner plug 20 is in the lower position (first position) and the outer peripheral surface of the inner plug 20 closes the sample inlets 13 and 13 (that is, H ₁ <H ₃ ). It is in. Further, the inner plug 20 is in the upper position (second position), and the lower edge of the inner plug 20 is below the lower edges of the discharge ports 15, 15, and at this position, the inner plug 25 is in the uppermost position. Accordingly, at the position above the inner plug 25, the discharge ports 15, 15 and the sample intake ports 13, 13 are provided with the inner plug 20 and do not communicate with each other through the inside of the sample container 1. The above upper and lower positions are operated by raising and lowering the inner rods 24, 24 from the ground.
For stable sliding of the inner plug 20, it is desirable that the height H ₂ of the discharge port 15 <the height H ₃ of the inner plug 20.

(6) The outer plug 25 is slidably fitted on the outer periphery of the lower end of the sample container 1, and the tips of the outer rods 29 and 29 are fixed to the outer plug 25 in the fitted state or before fitting. To do. In this state, the tip portion of the tip sharpened portion 33 of the sample container 1 protrudes downward from the opening 28 a of the outer cylinder 25.

(7) The sampling apparatus 40 of the present invention is configured as described above (FIG. 2 (a)).

2. Collection method

(1) Next, the use of the sampling device 40 based on the embodiment will be described.

(2) A predetermined pile hole 44 is excavated by the excavation head of the excavation rod 42, the cement hole is filled with cement milk, and the excavation rod 42 is pulled up. The connecting portion 31 of the sampling device 40 is inserted into the lower end portion of the excavation rod 42 and the sampling device 40 is attached to the excavation rod 42. In this case, the excavation head can be removed from the excavation rod 42 used for excavation, or a separate excavation rod 42 can be used.
In the sample collection device 40, the inner rod 24 is at a lower position with respect to the sample container 1, the inner plug 20 closes the sample intake port 13, and the outer rod 29 is at an arbitrary position (FIG. 2 (a)). In FIG. 2A, the outer rod 29 is in the lower position. While maintaining the relative positions of the sample container 1 and the inner rod 24, the sample collection device 40 is lowered in the pile hole 44. The inner rod 24 and the outer rod 29 of the sampling device 40 are disposed along the excavating rod 42 and extend upward so that the inner rod 24 and the outer rod 29 can be raised and lowered from the ground. If it can be operated from the ground, the upper ends of the inner rod 24 and the outer rod 29 need not necessarily reach the ground.
When the pile hole 44 is deep, the sampling device 40 is lowered to a predetermined depth while connecting the excavation rod 42, the inner rod 24, and the outer rod 29 (FIG. 2 (a)). In this state, muddy water (including some cement milk) may flow into the sample container 1 of the sample collecting device 40 from the discharge ports 15 and 15 at a depth in the middle of embedding.

(3) When the predetermined sampling depth is reached (usually in the root fixation), the lowering of the excavation rod 42 is stopped and held at that position. In this case, when collecting a sample near the bottom of the pile hole, the sample collection device 40 is more stable in the horizontal direction by pressing the tip sharp portion 33 against the pile hole bottom 46 (see FIG. 2B). . As described above, in this state, muddy water (including some cement milk) at a midway depth is filled in the sample container 1 above the inner plug 20.
Further, in this state, since the outer rod 39 (outer plug 25) is in the lower position, the outer plug 25 does not block the sample intake port 13. In this state, the inner rod 24 is raised and the inner plug 20 is raised by an operation from the ground. At this time, due to the rise of the inner plug 20, the mud above the inner plug 20 is pushed out of the sample container 1 from the discharge port 15 (into the pile hole).
At the same time, as the inner stopper 20 rises, cement milk of that depth is drawn into the sample container 1 from the sample collection port 13 (FIG. 2 (b)). Here, as described above, since the contents of the sample container 1 are discharged from the discharge port 15 and taken in from the sample collection port 13, there is no problem in the operation of the inner plug 20 and the inner rod 24.

(4) When the inner plug 20 reaches the upper position, the inner rod 24 is held at that position, the outer rod 29 is raised, the sample intake port 13 is closed, and the contained cement milk is substantially sealed. (FIG. 2C). In this state, the relative positions of the sample container 1 (that is, the excavation rod 42), the inner rod 24, and the outer rod 29 are maintained, and the excavation rod 42 is pulled up to the ground. Along with this, the collection device 40 is also lifted to the ground.

(5) The soil cement is taken out from the sample container 1 of the collection device 40 pulled up to the ground, and transferred to an analysis container (a specimen preparation form, a temporary storage container for analysis, etc.) by an arbitrary method. For example, with the sampling device 40 attached to the excavation rod 42, the sample is moved above the analysis container (not shown), the outer rod 29 is lowered, and the inner rod 24 is further lowered, The soil cement in the container 1 is discharged from the sample inlet 13 into the analysis container. Alternatively, the sample container 1 can be transferred to the analysis container using a ladle or a pump, or the sampling device 40 can be removed from the excavation rod 42 to perform the same operation.

(6) Since the cement milk is sampled at a predetermined depth while taking out the contents contained in the sample container 1 in this way, the sampling device 40 (sample container 1) is placed at a different depth during the embedding. Muddy water and soil cement do not stay in the sample container 1. Therefore, since the cement milk at that depth can be collected more accurately, the design strength can be guaranteed.

3. Other examples

(1) In the above embodiment, two or more inner rods 24 are attached to the outer peripheral side of the inner plug 20, but one inner rod 24 may be provided near the center of the inner plug 20 (FIG. 14B). )). In this case, one through-hole 5 in the top plate 3 of the sample container 1 is also formed near the center of the top plate 3 so as to correspond to the inner rod 24 (FIG. 14A).
Further, in this case, the intermediate portion of the inner rod 24 passes through the through hole 5 of the top plate 3 and passes through the hollow portion of the connecting portion 31 and the hollow portion of the connected excavating rod 42 (FIG. 15A )), Extends upwards, and can be operated up and down from the ground.

In this case, the sampling by the sampling device 40 is the same as that in the above embodiment. That is, the inner rod 24 is lowered with respect to the sample container 1 and the inner plug 20 is lowered to a predetermined depth while closing the sample intake port 13 (FIG. 15A). Subsequently, the tip sharpened portion 33 is pressed against the pile hole bottom 46, the inner rod 24 is raised, the inner plug 20 is raised, the upper mud is pushed out from the discharge port 15, and the cement at the depth from the sampling port 13. Milk is drawn into the sample container 1 (FIG. 15B). When the inner plug 20 reaches the upper position, the inner rod 24 is held, the outer rod 29 is raised, the sample intake 13 is closed, and the contained cement milk is substantially sealed (FIG. 15 (c). )). In this state, the relative position of the inner rod 24 and the outer rod 29 is maintained, and the sampling device 40 is pulled up together with the excavating rod 42 to the ground.
In this case, since the inner rod 24 is located in the sampling device 40 and the excavation rod 42, the inner rod 24 can be reliably moved up and down without being affected by the solid matter in the pile hole 44.
Further, in this case, since the drill rod 42 used in a general drilling rig usually has a hollow portion in the drill rod 42, it is optional regardless of the type of drilling device that supports the drill rod 42 on the ground and moves up and down. It is also possible to adopt a drilling device.

  Another embodiment of the present invention will be described with reference to FIGS.

  In the first embodiment, the inner rod 24 and the outer rod are used to operate the sealing and opening of the sample inlet 13 and the outlet 15. However, this embodiment is an embodiment in which only the inner rod 24 is operated.

1. Configuration of sampling device 40

(1) Similar to Example 1, the sample container 1 is formed by closing the top and bottom openings of the substantially cylindrical side plate 10 with the top plate 3 and the bottom plate 7 (FIG. 3A). A connecting portion 31 connected to the excavation rod 42 from the ground is provided upward on the upper surface (outer surface) 4a of the top plate 3, and the sample is inserted into the bottom of the pile hole at the center of the lower surface (outer surface) 8a of the bottom plate 7. A pointed tip 33 for stabilizing the container 1 is provided facing downward.
In the top plate 3, sample inlets 13 and 13 are formed on the outer peripheral side of the connecting portion 31 at positions that are symmetric in diameter. The sample inlets 13 and 13 are also used as the through holes 5 and 5 in the above embodiment.
Further, a plurality of openings having a height H ₂ are provided at the same height at the lower end of the side plate 10, and the discharge ports 15 and 15 are provided. The height of the discharge port 15 and _{H 2.}

(2) The inner stopper 20 is formed from a disk having a height (thickness) H ₃ having an outer diameter corresponding to the inner diameter of the side plate 10 of the sample container 1. The outer diameter of the inner plug 20 is formed so that the outer peripheral surface of the inner plug 20 and the inner peripheral surface of the side plate 10 are watertight and the inner plug 20 can slide in the side plate 10 (FIG. 3B). ).
Moreover, the lower end part of the inner rod 24 (first operation rod) for operating the vertical movement of the inner plug 20 from the ground is connected to the vicinity of the outer peripheral portion of the inner plug 20. The inner rods 24 and 24 are inserted into the sample collection port 13 of the top plate 3 of the sample container 1 and attached to a position where the vertical movement of the inner plug 20 can be operated. The second inner plugs 35 are fixed at the same height above the inner plug 20 at the intermediate portions of the inner rods 24, 24, respectively. here,
Inner plug height H ₃ > Sample inlet 13 height H ₁
It is as.

(3) The sample container 1 and the inner stopper 20 are formed as described above.

(4) The inner plug 20 is slidably inserted into the sample container 1, and the lower ends of the inner rods 24, 24 penetrating the sample inlets 13, 13 of the top plate 3 are fixed to the inner plug 20.

The inner plug 20 hits the top plate 3 at the ascending position (first position) and closes the sample inlets 13 and 13, and in this state, the inner plug 20 is at the uppermost position (FIG. 4 (a)). )).
Further, the inner plug 20 is in the lower position (second position), and the outer peripheral surface 22 of the inner plug 20 closes the discharge ports 15 and 15. In this state, the inner plug 25 is at the lowermost position, and the second inner plug 35 closes the sample inlet 13 (FIG. 4C). Here, the outlets 15, 15 and the sample inlets 13, 13 Has an intermediate plug 20 and does not communicate with the inside of the sample container 1. The above upper and lower positions are operated by raising and lowering the inner rods 24 and 24 from the ground.

(5) The sampling apparatus 40 of the present invention is configured as described above (FIG. 4 (a)).

2. Collection method

(1) Next, the use of the sampling device 40 based on the embodiment will be described.

(2) In the same manner as in Example 1, a pile hole 44 is formed and filled with cement milk.
The sample collection device 40 is attached to the lower end of the excavation rod 42, and the inner rod 24 is at an upper position with respect to the sample container 1, and the inner plug 20 closes the sample intake port 13 (FIG. 4A). )). The inner rod 24 is disposed along the excavation rod 42, extends upward, and can be moved up and down from the ground.
While maintaining the relative positions of the sample container 1 and the inner rod 24, the sample collection device 40 is lowered in the pile hole 44. Similarly, when the pile hole 44 is deep, the sampling device 40 is lowered to a predetermined depth while connecting the excavation rod 42 and the inner rod 24 (FIG. 4A). In this state, muddy water (including some cement milk) may flow into the sample container 1 of the sample collecting device 40 from the discharge ports 15 and 15 at a depth in the middle of embedding.

(3) When the predetermined sampling depth is reached (usually in the root fixation), the lowering of the excavation rod 42 is stopped and held at that position. In this case, when the sample near the bottom of the pile hole is collected, if the tip sharpened portion 33 is pressed against the pile hole bottom 46, the sample collecting device 40 becomes more stable in the horizontal direction (see FIG. 4B). . As described above, in this state, the sample container 1 is filled with muddy water (including some cement milk) in the middle of the depth below the inner plug 20.

(4) In this state, the inner rod 24 is lowered by the operation from the ground, and the inner plug 20 is lowered. At this time, due to the lowering of the inner plug 20, the mud soil under the inner plug 20 in the sample container 1 is pushed out of the sample container 1 (into the pile hole) from the discharge port 15. In this case, the inner rod 24 is lowered, but the inner rod 24 can be lowered relative to the sample container 1 by holding the inner rod 24 and raising the excavating rod 42 (not shown). Absent).
At the same time, when the inner plug 20 is lowered, the cement milk of that depth is drawn into the sample container 1 from the sample collection port 13 (FIG. 4B). Here, as described above, since cement milk is taken in from the sample collection port 13 while discharging the contents of the sample container 1 from the discharge port 15, there is no hindrance to the operation of the inner plug 20 and the inner rod 24.

(5) When the inner plug 20 reaches the lower position, the inner rod 24 is held at that position. In this state, the inner plug 20 closes the discharge port 15, and the second inner plugs 35, 35 block the sample intake ports 13, 13, thereby substantially sealing the contained cement milk (FIG. 4C). In this state, the relative position between the sample container 1 (that is, the excavation rod 42) and the inner rod 24 is maintained, and the excavation rod 42 is pulled up to the ground. Along with this, the collection device 40 is also lifted to the ground.

(6) As in the above embodiment, the soil cement is taken out from the sample container 1 of the collection device 40 pulled up to the ground by an arbitrary method. For example, when the inner rod 24 is moved up by moving it above the analysis container (not shown) while being attached to the excavation rod 42, the soil cement in the sample container 1 is opened to the discharge ports 15, 15 and the like. To the analysis container. Alternatively, the same operation can be performed by removing the sampling device 40 from the excavating rod 42 or pumping it with a scissors or the like.

(7) As described above, the cement milk is sampled at a predetermined depth while taking out the contents contained in the sample vessel 1, so that the sampling device 40 (sample vessel 1) is placed at a different depth during the embedment. Muddy water and soil cement do not stay in the sample container 1. Therefore, since the cement milk at that depth can be collected more accurately, the design strength can be guaranteed.

3. Other examples

(1) In the above embodiment, the sample inlet 13 is provided at the upper end of the sample container 1 and the outlet 15 is provided at the lower end. Conversely, the sample inlet 13 is provided at the lower end of the sample container 1, A discharge port 15 can also be provided at the upper end (FIGS. 5 and 6).
In this case, it is the top plate 3, and the discharge ports 15, 15 are formed on the outer peripheral side of the connecting portion 31 at positions that are symmetric in diameter, and are also used as the through holes 5, 5. In addition, an opening having a height H ₁ is provided at the lower end of the side plate 10 at the same height to form sample inlets 13 and 13, and the bottom plate 7 is positioned vertically below the outlet 15 (that is, the bottom plate 7). Thus, the sample inlets 13 and 13 are also formed on the peripheral edge or the outer peripheral side of the tip sharpened portion 33 (FIG. 5A).
At the intermediate portion of the inner rods 24, 24, the second inner plug 35 is fixed at the same height below the inner plug 20 (FIG. 5B). here,
The height H _{3 of the} inner plug 20> the height H _{1 of the} sample inlet 13
The height H ₄ of the second inner plug 20> the height H _{1 of the} sample inlet 13
It is as.
The inner plug 20 is slidably inserted into the sample container 1, and the inner rods 24, 24 penetrating the sample inlets 13, 13 of the bottom plate 7 are fixed to the inner plug 20.
The inner stopper 20 hits the bottom plate 7 at the lower position (first position) and closes the sample inlets 13 and 13, and in this state, the inner stopper 20 is at the lowermost position (FIG. 6A). ).
Further, the inner plug 20 is in the upper position (second position), and the inner plug 20 hits the top plate 3 and closes the discharge ports 15 and 15 (FIG. 6B). In this state, the inner plug 25 is at the uppermost position, and the second inner plug 35 closes the sample inlets 13 and 13.

(2) Therefore, in the embodiment of FIGS. 5 and 6, when the sample collection device 40 is used, the operation of moving the inner rod 24 up and down is the reverse of that of the embodiment (FIGS. 6A and 6B). (C)).
That is, in a state where the inner rod 24 is lowered, the sample inlet 13 is closed with the inner plug 20, and the sample collecting device 40 is lowered in the pile hole 44 (FIG. 6 (a)) to reach the sample collecting depth. If so, the sample collection device 40 is held in that position, the inner rod 24 is raised to raise the inner plug 20, the mud on the inner plug 20 is taken out from the upper discharge port 15, and the lower sample collection port is The cement milk having the depth from 13 is taken into the sample container 1 (FIG. 6B). When the inner plug 20 reaches an upper position (a state in which the upper surface of the inner plug 20 faces the lower surface of the top plate 3), the inner plug 20 closes the discharge port 15, and the second inner plugs 35 and 35 are the sample intake ports. 13 and 13 are closed and the contained cement milk is substantially sealed (FIG. 6C), and the excavation rod 42 and the sampling device 40 are also lifted to the ground as they are.

(3) Moreover, in the said Example, although the discharge port 15 was formed in the lower end part of the side plate 10 (FIG. 3 (a)), the discharge port 15 is formed in the center of the bottom plate 7, and the sampling device 40 is comprised. (FIGS. 7A and 7C). In this case, the tip sharpened portion 33 can be omitted, and further, the second inner plug 35 can be omitted (FIGS. 7A and 7B).
In the same manner as in the above embodiment, the inner plug 20 is placed in the upper position, embedded in the pile hole 44 (FIG. 7C), the inner plug 20 is lowered at a predetermined depth, and the outlet 15 The sample container 1 is filled with cement milk from the sample intakes 13 and 13 while discharging the inflow on the way (FIG. 7 (d)).

(4) Moreover, in the said Example, although the 2nd inside plug 35 was fixed to the inner rod 24 with the sample-collecting apparatus 40 of FIG. 3, FIG. 4, it is auxiliary to the position of the inner rod 24 of the said Example. Inner rods 37 and 37 may be provided to fix the second inner plug 35, and an inner rod 24 for operating the inner plug 20 from the ground may be separately provided near the center of the inner plug 20 (FIG. 16A). . In this case, the auxiliary inner rod 37 may be short and may be formed up to the position of the second inner plug 35. Moreover, in the said Example, although the sample inlets 13 and 13 and the through-holes 5 and 5 were combined with the top plate 3, what is the sample inlets 13 and 13 corresponding to the auxiliary | assistant inner rod 37 and the 2nd inside plug 35? Separately, a through hole 5 through which the inner rod 24 can pass is formed in the vicinity of the center of the top plate 3 (FIG. 17A).
In this case, the sampling by the sampling device 40 is the same as that in the above-described embodiment (FIG. 4). That is, in a state where the inner rod 24 is raised (a state where the upper surface of the inner plug 20 faces the lower surface of the top plate 3), the sample collection device 40 is lowered in the pile hole 44 (FIG. 17 (a)), When the sample collection depth is reached, the sample collection device 40 is held in that position, the inner rod 24 is lowered to lower the inner plug 20, the mud under the inner plug 20 is taken out from the discharge port 15, and the sample is collected. The cement milk of that depth is taken into the sample container 1 from the collection port 13 (FIG. 17B). When the inner plug 20 reaches the lower position, the inner plug 20 closes the discharge port 15 and the second inner plugs 35 and 35 block the sample intake ports 13 and 13 so that the contained cement milk is substantially sealed ( As shown in FIG. 17C, the excavation rod 42 and the sampling device 40 are also lifted to the ground.
In this case, since the inner rod 24 is located in the sampling device 40 and the excavation rod 42, the inner rod 24 can be reliably moved up and down without being affected by the solid matter in the pile hole 44.

(5) Moreover, in the said Example, although the 2nd inside plug 35 was fixed to the inner rod 24 with the sample-collecting apparatus 40 described in FIG. 5, FIG. 6, the said implementation was carried out similarly to said (4). Auxiliary inner rods 37, 37 are provided at the position of the inner rod 24 in the example to fix the second inner plug 35, and an inner rod 24 for operating the inner plug 20 from the ground is separately provided near the center of the inner plug 20. (FIG. 16B). In this case, as in FIG. 16A, the auxiliary inner rod 37 may be short as long as it is formed up to the position of the second inner plug 35. Moreover, in the said Example (FIG. 5, FIG. 6), although the discharge ports 15 and 15 and the through-holes 5 and 5 were combined with the top plate 3, the discharge port corresponding to the auxiliary | assistant inner rod 37 and the 2nd inside plug 35 is used. Apart from 15 and 15, a through hole 5 through which the inner rod 24 can pass is formed near the center of the top plate 3 (FIG. 18A).
In this case, the sampling by the sampling device 40 is the same as that in the above embodiment (FIG. 6).
That is, with the inner rod 24 lowered, the sample inlet 13 is closed with the inner plug 20, and the mouth sampling device 40 is lowered in the pile hole 44 (FIG. 16 (a)), leading to the sampling depth. Then, the inner rod 24 is raised to raise the inner plug 20, the mud on the inner plug 20 is taken out from the upper discharge port 15, and the cement milk of that depth is sampled from the lower sampling port 13. It takes in in the container 1 (FIG.18 (b)). When the inner plug 20 reaches an upper position (a state in which the upper surface of the inner plug 20 faces the lower surface of the top plate 3), the inner plug 20 closes the discharge port 15, and the second inner plugs 35 and 35 are the sample intake ports. 13 and 13 are closed, and the contained cement milk is substantially sealed (FIG. 18C), and the excavation rod 42 and the sampling device 40 are also lifted to the ground as they are.

  Another embodiment of the present invention will be described with reference to FIGS. This embodiment is an embodiment that does not use the outer rod 29 as in the second embodiment, and is an embodiment in which the sample inlet 13 is provided at the center of the bottom plate 7.

1. Configuration of sampling device 40

(1) Similar to Example 1, the sample container 1 is formed by closing the top and bottom openings of the substantially cylindrical side plate 10 with the top plate 3 and the bottom plate 7 (FIG. 8A). A connecting portion 31 connected to the excavation rod 42 from the ground is provided on the upper surface (outer surface) 4a of the top plate 3 so as to face upward, and the bottom surface (outer surface) 8a outer peripheral portion of the bottom plate 7 is inserted into the bottom of the pile hole, A pointed tip 33 for stabilizing the container 1 is provided facing downward.
In the top plate 3, the discharge ports 15, 15 are formed on the outer peripheral side of the connecting portion 31 at positions that are symmetric in diameter. The sample inlets 15 and 15 are also used as the through holes 5 and 5 of the above embodiment.
A sample inlet 13 is formed at the center of the bottom plate 7. The thickness of the height of the bottom plate 7 and H _4.

(2) The inner stopper 20 is formed from a disk having a height (thickness) H ₃ having an outer diameter corresponding to the inner diameter of the side plate 10 of the sample container 1. The outer diameter of the inner plug 20 is formed so that the outer peripheral surface of the inner plug 20 and the inner peripheral surface of the side plate 10 are watertight and the inner plug 20 can slide in the side plate 10 (FIG. 9).
Moreover, the lower end part of the inner rod 24 (first operation rod) for operating the vertical movement of the inner plug 20 from the ground is connected to the vicinity of the outer peripheral portion of the inner plug 20. The inner rods 24 and 24 are inserted into the discharge port 15 of the top plate 3 of the sample container 1 and attached at a position where the vertical movement of the inner plug 20 can be operated. An auxiliary inner rod 37 is provided at the center of the lower surface 21a of the inner rods 24, 24 downward, and the second inner plug 35 is fixed to the lower end of the auxiliary inner rod 37 (FIG. 8B). The plug 35 is configured so as to be able to block the sample inlet 13. Here,
The height H ₅ of the second inner plug 35> the thickness H _{1 of the} bottom plate 7
It is as.

(3) The sample container 1 and the inner stopper 20 are formed as described above.

(4) The inner plug 20 is slidably inserted into the sample container 1, and the lower ends of the inner rods 24, 24 passing through the discharge ports 15, 15 of the top plate 3 are fixed to the inner plug 20. The auxiliary inner rods 37 and 37 protrude downward from the sample inlet 13 (FIG. 8).

The inner plug 20 is in the lower position (first position) and the lower surface 21a of the inner plug 20 hits the bottom plate 7 to block the sample intake port 13. In this state, the inner plug 20 is at the lowermost position (FIG. 9 (a)). )).
Further, the inner plug 20 is in the upper position (second position), and the upper surface 20 of the inner plug 20 closes the discharge ports 15 and 15. In this state, the inner plug 25 is at the uppermost position, and the second inner plug 35 is inserted into the sample inlet 13 to close it (FIG. 9C). Here, the discharge ports 15, 15 and the sample intake port 13 have an inner plug 20 between them, and do not communicate with each other through the inside of the sample container 1. The above upper and lower positions are operated by raising and lowering the inner rods 24, 24 from the ground.

(5) The sampling apparatus 40 of the present invention is configured as described above (FIG. 9 (a)).

2. Collection method

(1) Next, the use of the sampling device 40 based on the embodiment will be described.

(2) A pile hole 44 is formed and filled with cement milk in the same manner as in Examples 1 and 2.
The sample collection device 40 is attached to the lower end of the excavation rod 42, and the inner rod 24 is in a lower position with respect to the sample container 1, and the inner plug 20 closes the sample intake port 13 (FIG. 9A). )).
While maintaining the relative position of the sample container 1 and the inner rods 24 and 24, the sample collection device 40 is lowered in the pile hole 44. The inner rod 24 of the sampling device 40 is disposed along the outside of the excavation rod 42 and extends upward so that it can be moved up and down from the ground.
Similarly, when the pile hole 44 is deep, the sampling device 40 is lowered to a predetermined depth while connecting the excavating rod 42 and the inner rod 24 (FIG. 9A). In this state, muddy water (including some cement milk) may flow into the sample container 1 of the sample collecting device 40 from the discharge ports 15 and 15 at a depth in the middle of embedding.

(3) When the predetermined sampling depth is reached (usually in the root fixation), the lowering of the excavation rod 42 is stopped and held at that position. In this case, when the sample near the bottom of the pile hole is collected, if the tip sharpened portion 33 is pressed against the pile hole bottom 46, the sample collecting device 40 becomes more stable in the horizontal direction (see FIG. 9B). . As described above, in this state, muddy water (including some cement milk) at a midway depth is filled in the sample container 1 above the inner plug 20.

(4) In this state, the inner rod 24 is raised by the operation from the ground, and the inner plug 20 is raised. At this time, due to the rise of the inner plug 20, the mud on the inner plug 20 in the sample container 1 is pushed out of the sample container 1 from the discharge ports 15 and 15 (into the pile hole).
At the same time, as the inner stopper 20 rises, cement milk of that depth is drawn into the sample container 1 from the sample collection port 13 (FIG. 9B). Here, as described above, since cement milk is taken in from the sample collection port 13 while discharging the contents of the sample container 1 from the discharge port 15, there is no hindrance to the operation of the inner plug 20 and the inner rod 24.

(5) When the inner plug 20 reaches the upper position, the inner rod 24 is held at that position. In this state, the inner plug 20 closes the discharge port 15, and the second inner plugs 35, 35 block the sample intake ports 13, 13, thereby substantially sealing the contained cement milk (FIG. 9C). In this state, the relative position between the sample container 1 (that is, the excavation rod 42) and the inner rod 24 is maintained, and the excavation rod 42 is pulled up to the ground. Along with this, the collection device 40 is also lifted to the ground.

(6) Cement milk (soil cement) is taken out from the sample container 1 of the collection device 40 pulled up to the ground by an arbitrary method in the same manner as in the above embodiments. For example, if the sampling device 40 pulled up to the ground is moved above the analysis container (not shown) while being attached to the excavation rod 42 and the inner rod 24 is lowered, the soil cement in the sample container 1 Is discharged from the sample inlet 13 into the analysis container (see FIG. 9B). Alternatively, the sampling device 40 can be removed from the excavation rod 42 and the same operation can be performed.

(7) As described above, the cement milk is sampled at a predetermined depth while taking out the contents contained in the sample vessel 1, so that the sampling device 40 (sample vessel 1) is placed at a different depth during the embedment. Muddy water and soil cement do not stay in the sample container 1. Therefore, since the cement milk at that depth can be collected more accurately, the design strength can be guaranteed.

3. Other examples

(1) In the embodiment, two or more inner rods 24 are attached to the outer peripheral side of the inner plug 20, but one inner rod 24 can be provided near the center of the inner plug 20 (FIG. 20 (a)). )). In this case, in the above embodiment, the top plate 3 also serves as the discharge ports 15 and 15 and the through holes 5 and 5, but the inner rod 24 is located near the center of the top plate 3 separately from the discharge ports 15 and 15. A through-hole 5 through which can pass is formed (FIG. 20B).
Further, in this case, the intermediate portion of the inner rod 24 passes through the through hole 5 of the top plate 3 and passes through the hollow portion of the connecting portion 31 and the hollow portion of the connected excavating rod 42 (FIG. 20B). )), Extends upwards, and can be operated up and down from the ground.

In this case, the sampling by the sampling device 40 is the same as that in the above embodiment. That is, the sample collection device 40 is lowered to the collection depth in a state where the inner rod 24 is at the lower position and the inner plug 20 closes the sample intake port 13 (FIG. 20B). The inner rod 24 is raised to raise the inner plug 20, and the mud on the inner plug 20 is pushed upward from the discharge ports 15, 15, and at the same time, cement milk of the depth from the sample collection port 13 is put into the sample container 1. Pull in (FIG. 20 (c)). The inner stopper 20 is in the upper position, the inner stopper 20 closes the discharge port 15, and the second inner stoppers 35, 35 close the sample inlets 13, 13, and the contained cement milk is substantially sealed (FIG. 20 (c)). ) Pull the collection device 40 to the ground.
In this case, since the inner rod 24 is located in the sampling device 40 and the excavation rod 42, the inner rod 24 can be reliably moved up and down without being affected by the solid matter in the pile hole 44.

  Another embodiment of the present invention will be described with reference to FIGS. In this embodiment, the sample container 1 is provided on the inner rod 7 side, and the inner plug 20 is connected to the excavation rod.

1. Configuration of sampling device 40

(1) The sample container 1 is formed by closing the upper and lower openings of the substantially cylindrical side plate 10 with the top plate 3 and the bottom plate 7 (FIG. 10B). The top plate 3 has an opening on the center side excluding the peripheral edge portion, and the opening serves as a sample inlet 13. The bottom plate 7 also has an opening on the center side excluding the peripheral edge portion, and the opening serves as a discharge port 15. The lower ends of the inner rods 24, 24 are connected to the upper end of the outer surface 11a of the side plate 10.
An inner plug 20 that can be inserted and slid into the side plate 10 and that can be in contact with the upper surface 8 of the bottom plate 7 to close the discharge port 15, is disposed above the inner plug 20, and contacts the top plate 3. A cylindrical body 38 is connected to an outer plug 25 that can contact and close the sample inlet 13. The lower cylindrical body 38a is connected to the lower surface of the inner plug 20 downward, and the tip sharpened portion 33 is connected to the lower surface of the lower cylindrical body 38a.
Moreover, the connection part 31 connected with the excavation rod 42 from the ground is provided in the upper surface of the outer plug 25 so as to face upward. The connecting portion 31, the outer plug 25, the cylindrical body 38, the inner plug 20, the lower cylindrical body 38a, and the tip sharpened portion 33 are arranged coaxially.

(2) The inner plug 20 is a disk having an outer diameter corresponding to the inner diameter of the side plate 10, and the outer diameter of the inner plug 20 is such that the outer peripheral surface of the inner plug 20 and the inner peripheral surface of the side plate 10 are watertight, Further, the inner plug 20 is formed so as to be able to slide in the side plate 10 (FIG. 11).
Further, the outer surface of the lower cylinder 38a, release the height H ₇ from the lower surface of the inner plug 20 is provided a stopper 51 of the triangle infested horizontally. The stopper 51 is arranged so that the upper edge is horizontal and protrudes from the spring (FIG. 10A). here,
Height H ₇ > Thickness H _{4 of} bottom plate 7
It is formed to become.

(3) The sample container 1 and the inner stopper 20 are formed as described above.

(4) The inner plug 20 is slidably inserted into the side plate 10 of the sample container 1. The cylindrical body 38 penetrates into the sample inlet 13 with a sufficient gap, and the auxiliary cylindrical body 38a penetrates into the outlet 15 with a sufficient gap (FIG. 12). In a state where the lower surface of the inner plug 20 contacts the upper surface 8 of the bottom plate 7 and closes the discharge port 15, the lower surface of the outer plug 25 contacts the upper surface 4 of the top plate 3 and closes the sample intake port 13 (FIG. 11 ( d)).
When the inner plug 20 is in the upper position (first position), the upper surface 21 of the inner plug 20 hits the lower surface 8a of the bottom plate 7 and closes the sample intake port 13. In this state, the inner plug 20 is at the uppermost position (FIG. 11 (a)).
Further, the inner plug 20 is in the lower position (second position), and the lower surface 2 a of the inner plug 20 closes the discharge port 15. In this state, the inner plug 20 is at the lowermost position, and the lower surface 26a of the outer plug 35 comes into contact with the upper surface 4a of the top plate 3 to close the sample inlet 13 (FIG. 11 (d)). Here, the discharge port 15 and the sample take-in port 13 have an inner plug 20 between them, and do not communicate with each other through the inside of the sample container 1. The above upper and lower positions are operated by raising and lowering the inner rods 24, 24 from the ground.

(5) The sampling apparatus 40 according to the present invention is configured as described above (FIG. 11 (a)).

2. Collection method

(1) Next, the use of the sampling device 40 based on the embodiment will be described.

(2) A pile hole 44 is formed and filled with cement milk in the same manner as in Examples 1 and 2.
A sample collection device 40 is attached to the lower end of the excavation rod 42, and the inner rod 24 is in a lower position with respect to the sample container 1, and the inner plug 20 closes the sample inlet 13 (FIG. 11 (a). )). While maintaining the relative position of the sample container 1 and the inner rods 24, 24, the sample collection device 40 is lowered in the pile hole 44. The inner rod 24 of the sampling device 40 extends upward and can be moved up and down from the ground.
Similarly, when the pile hole 44 is deep, the sampling device 40 is lowered while connecting the excavation rod 42 and the inner rod 24. In this state, muddy water (including some cement milk) flows into the sample container 1 of the sample collection device 40 from the discharge ports 15 and 15 at a depth in the middle of embedding.

(3) When the predetermined sampling depth is reached (usually in the root fixation), the lowering of the excavation rod 42 is stopped and held at that position. In this case, when the sample near the pile hole bottom is collected, if the tip sharpened portion 33 is pressed against the pile hole bottom 46, the sample collecting device 40 is more stable in the horizontal direction. As described above, in this state, the sample container 1 is filled with muddy water (including some cement milk) in the middle of the depth below the inner plug 20.

(4) In this state, the inner rod 24 is raised by operation from the ground, and the inner plug 20 is relatively lowered (FIG. 11 (b)). At this time, due to the lowering of the inner stopper 20, the mud below the inner stopper 20 in the sample container 1 is pushed out of the sample container 1 (into the pile hole) from the discharge ports 15 and 15.
At the same time, when the inner stopper 20 is lowered, the cement milk of that depth is drawn into the sample container 1 from the sample collection port 13 (FIGS. 11B and 11C). Here, as described above, cement milk is taken in from the sample collection port 13 while discharging the contents of the sample container 1 from the discharge port 15, so that the operation of the inner rod 24 is not hindered.

(5) Immediately before the inner plug 20 reaches the lower position, the peripheral edge of the discharge port 15 of the bottom plate 7 pushes the oblique side of the stopper 51 from below, so that the stopper 51 resists the spring and is located on the center side of the lower cylindrical body 38a. It sinks towards (FIGS. 11B and 11C).
Subsequently, when the inner plug 20 is further lowered, the peripheral edge of the discharge port 15 of the bottom plate 7 exceeds the oblique side of the stopper 51 and reaches a horizontal plane, and the stopper 51 returns to the original protruding state by a spring (FIG. 11). (D)). In this state, the inner plug 20 reaches the lower position, the bottom plate 7 is sandwiched between the inner plug 20 and the stopper 51, the movement is restricted, and the inner rod 24 is held in that position. In this state, the inner plug 20 closes the discharge port 15, and the outer plugs 35, 35 block the sample intake port 13, thereby substantially sealing the contained cement milk (FIG. 11 (d)). In this state, the excavation rod 42 is pulled up to the ground. Along with this, the collection device 40 is also lifted to the ground.

(6) Cement milk (soil cement) is taken out from the sample container 1 of the collection device 40 pulled up to the ground by an arbitrary method in the same manner as in the above embodiments. For example, if the sampling device 40 pulled up to the ground is moved above the analysis container (not shown) while being attached to the excavation rod 42, the stopper 51 is pushed in, and the inner rod 24 is lowered, the sample can be obtained. The soil cement in the container 1 is discharged from the sample inlet 13 into the analysis container. Alternatively, the sampling device 40 can be removed from the excavation rod 42 and the same operation can be performed.

(7) As described above, the cement milk is sampled at a predetermined depth while taking out the contents contained in the sample vessel 1, so that the sampling device 40 (sample vessel 1) is placed at a different depth during the embedment. Muddy water and soil cement do not stay in the sample container 1. Therefore, since the cement milk at that depth can be collected more accurately, the design strength can be guaranteed.

  Another embodiment will be described with reference to FIGS. In the above embodiment, the connecting portion 31 for connecting the excavation rod 42 to the sample container 1 is formed. However, in this embodiment, the connecting portion 31 for connecting the excavation rod 42 to the inner plug 20 is formed, The sample container 1 is moved up and down by connecting the rod 24.

1. Configuration of sampling device 40

(1) Similar to Example 1, the sample container 1 is formed by closing the upper and lower openings of the substantially cylindrical side plate 10 with the top plate 3 and the bottom plate 7. A through-hole 5 is formed in the central portion of the top plate 1, discharge ports 15 and 15 are formed in the upper end portion of the side plate 10, and a sample intake port 13 is formed in the central portion of the bottom plate 7. Moreover, the lower end part of the inner rods 24 and 24 which operate raising / lowering of the sample container 1 from the ground is connected with the upper surface (outer surface) of the outer peripheral side of the top plate 3 (FIG.21 (b)). A plurality of inner rods 24 are provided.
The inner plug 20 is constituted by a disk having a height (thickness) H ₃ having an outer diameter corresponding to the inner diameter of the side plate 10 of the sample container 1. The outer diameter of the inner plug 20 is formed so that the outer peripheral surface of the inner plug 20 and the inner peripheral surface of the side plate 10 are watertight, and the inner plug 20 can slide in the side plate 10. A connecting portion 31 that connects to the excavation rod 42 from the ground is provided upward in the center of the upper surface of the inner plug 20. The connecting portion 31 is fixed to the upper surface of the inner plug 20 via the extension portion 32, and is formed so that the connecting portion 31 is arranged at a predetermined distance (at least about the height of the sample container 1) from the upper surface of the inner plug. (FIG. 21A).
The sample container 1 and the inner plug 20 are formed as described above.

(2) The inner stopper 20 is slidably inserted into the sample container 1, and the extension 32 passes through the through hole 5 of the top plate 3. The inner plug 20 hits the top plate 3 in the ascending position (first position), and the side of the inner plug 20 with the height H ₃ blocks the sample intake ports 13 and 13. In this state, the inner plug 20 Is at the uppermost position (FIG. 21 (c)).
Further, the inner plug 20 is in a lower position (second position), and the lower surface of the inner plug 20 closes the discharge ports 15 and 15. In this state, the inner plug 25 is at the lowermost position (FIG. 21 (e)). Here, there is an inner plug 20 between the discharge ports 15 and 15 and the sample intake ports 13 and 13, and the sample container 1 The above upper and lower positions are operated by raising and lowering the inner rods 24 and 24 from the ground.
As described above, the sampling apparatus 40 of the present invention is configured (FIG. 21).

2. Collection method

(1) Next, the use of the sampling device 40 based on the embodiment will be described.

(2) Pile holes 44 are formed and filled with cement milk in the same manner as in the above embodiments.
The sample collection device 40 is attached to the lower end of the excavation rod 42, the discharge port 15 is in a state where the inner rods 24, 24 are in the lower position with respect to the sample container 1, and the inner plug 20 blocks the sample intake ports 13, 13. Is in an open state (FIG. 21 (c)). The inner rod 24 is disposed along the excavation rod 42, extends upward, and can be moved up and down from the ground.
While maintaining the relative position of the sample container 1 and the inner rod 24, the sample collection device 40 is lowered in the pile hole 44, lowered to a predetermined sample collection depth, and the sample collection device 40 is held at that position.

(3) In this state, by operating from the ground, the inner rod 24 is raised and the sample container 1 is raised. At this time, the inner plug 20 is relatively lowered in the sample container 1, and the mud under the inner plug 20 is pushed out of the sample container 1 (into the pile hole) from the discharge port 15.
At the same time, when the inner plug 20 is lowered, the cement milk of that depth is drawn into the sample container 1 from the sample collection port 13 (FIG. 21 (d)). Here, as described above, since cement milk is taken in from the sample collection port 13 while discharging the contents of the sample container 1 from the discharge port 15, there is no hindrance to the operation of the inner plug 20 and the inner rod 24.

(4) When the inner plug 20 reaches the lower position, the lower surface of the inner plug 20 closes the discharge ports 15 and 15 and holds the inner rod 24 in that position (FIG. 21 (e)), and the excavation rod 42 To the ground. Along with this, the collection device 40 is also lifted to the ground.

(5) As in the above embodiment, the soil cement is taken out from the sample container 1 of the collection device 40 pulled up to the ground by an arbitrary method.

(6) Since the cement milk is sampled at a predetermined depth while taking out the contents contained in the sample container 1 in this way, the sampling device 40 (sample container 1) is placed at a different depth during the embedding. Muddy water and soil cement do not stay in the sample container 1. Therefore, since the cement milk at that depth can be collected more accurately, the design strength can be guaranteed.

3. Other examples

(1) In the above embodiment, two inner rods 24, 24 are attached to the outer peripheral side of the top plate 3 of the sample container 1. However, one inner rod 24 can be provided (FIG. 22B). In this case, the lower end portion of the inner rod 24 that has passed through the through hole 5 of the top plate 3 is fixed to the central portion by the upper surface (inner surface) of the bottom plate 7. Therefore, the discharge ports 15 and 15 are formed in parts other than the center part of the baseplate 7 (FIG.22 (b)).
Further, in this case, a through hole 23 through which the inner rod 24 can be inserted is also formed in the central portion of the inner plug 20 (FIG. 22A).
Accordingly, the inner rod 24 fixed to the upper surface (inner surface) of the bottom plate 7 of the sample container 1 in the state in which the inner stopper 20 is inserted into the sample container 1 and the sampling device 40 is configured is provided with the through hole 23 and the extension part of the inner stopper 20. It passes through the hollow part of 32, the hollow part of the connection part 31, and the hollow part of the excavation rod 42, and it is comprised so that raising / lowering can be operated from the middle (FIG.22 (c)).
In this case, the operation is the same as in the previous embodiment. That is, the inner rods 24 and 24 are in a lower position with respect to the sample container 1, and the inner plug 20 closes the sample intake ports 13 and 13 and the discharge port 15 is opened (FIG. 22C). The inner rod 24 is raised by the operation from the ground at the sampling depth in the pile hole 44 (FIG. 22 (d)). At the same time, the mud soil under the inner plug 20 is pushed out of the sample container 1 (into the pile hole) from the discharge port 15 in the sample container 1, and at the same time, cement milk of the depth from the sample collection port 13 is pushed into the sample container 1. Pull in (FIG. 22 (d)). Since the inner plug 20 is at the lowest position and the lower surface of the inner plug 20 closes the discharge ports 15 and 15 (FIG. 22E), the inner rod 24 is held in that position, and the sampling device 40 is moved together with the excavating rod 42. Pull it up to the ground.

DESCRIPTION OF SYMBOLS 1 Sample container 3 Top plate 4 Top plate inner surface 4a Top plate outer surface 5 Through-hole 7 Bottom plate 8 Bottom plate inner surface 8a Bottom plate outer surface 10 Side plate 11 Side plate inner surface 11a Side plate outer surface 12, 12a Side plate rib 13 Sample inlet 15 Discharge port 16 Lower edge 20 of discharge port Middle plug 21 Middle plug upper surface 21a Middle plug lower surface 22 Middle plug outer periphery 23 Middle plug through hole (Example 5)
24 Inner rod 25 Outer plug 26 Upper surface of outer plug 26a Lower surface of outer plug 27 Inner surface of outer plug 27a Outer surface of outer plug 28 Outer stopper 29 Outer rod 31 Connecting portion 32 Extension portion of connecting portion 33 Pointed tip portion 35 Second inner plug 37 Auxiliary inner rod 38 Cylindrical body 38a Lower cylindrical body 40 Sampling device 42 Drilling rod 44 Pile hole 45 Pile hole consolidation part 46 Pile hole bottom 51 Stopper

Claims (7)

A method for collecting pile hole fillings in the following process.
(1) The sampling device forms a sample inlet for taking in the pile hole filler at one end in the sample container, and an outlet at the other end. The sampling device is inserted into the sample container with a first stopper that slides between the sample inlet and the outlet and can seal the sample inlet or the outlet.
(2) The sample inlet is closed, the first stopper is positioned on the sample inlet side, the volume of the sample container on the sample inlet side is substantially zero, and the sampling device is set in the pile hole To do.
(3) Subsequently, at the predetermined sampling depth, the first stopper is moved to the discharge port side so that the volume on the discharge port side of the sample container is substantially zero, and the sample collection of the sample container is performed. The inlet is opened, and the “pile hole filling of the desired depth” is taken into the sample container from the sample inlet.
(4) Subsequently, the sample inlet or the outlet is substantially sealed with the first stopper, and the sampling device is lifted to the ground. A method for collecting pile hole fillings in the following process.
(1) The sampling device forms a sample inlet for taking in the pile hole filler at one end in the sample container, and an outlet at the other end. The sampling device is inserted into the sample container with a first stopper that slides between the sample inlet and the outlet and can seal the sample inlet or the outlet.
(2) The sample inlet is closed, the first stopper is positioned on the sample inlet side, the volume on the sample inlet side of the sample container is made substantially zero, and The sampling device is submerged in the pile hole while taking in a “pile hole filling of another depth”.
(3) Subsequently, the first stopper is moved to the discharge port side at a predetermined sampling depth, and the “pile hole filling of other depth” in the sample container is discharged from the discharge port. At the same time, the sample inlet of the sample container is opened, and the “pile hole filling having a target depth” is taken into the sample container from the sample inlet.
(4) Subsequently, the sample inlet and the outlet are substantially sealed with the first stopper and the second stopper, and the sampling device is lifted to the ground. A method for collecting pile hole fillings in the following process.
(1) The sampling device forms a sample inlet for taking in the pile hole filler at one end in the sample container, and an outlet at the other end. The sampling device is provided with a first stopper and a second stopper, and the sample inlet and outlet can be sealed. The sample container is formed so that the volume can be changed to substantially zero or maximum by operating the first stopper and the second stopper.
(2) The sample inlet is closed with the first stopper or the second stopper, the volume of the sample container is made substantially zero, and the sampling device is laid down to the sampling depth in the pile hole.
(3) Subsequently, at the predetermined sampling depth, the sample inlet of the sample container is opened, and the “pile hole filling of the target depth” is taken into the sample container, and the volume of the sample container is set. To fill the “pile hole filling of the desired depth” in the sample container.
(4) Subsequently, the sample inlet and the outlet are substantially sealed with the first stopper and the second stopper, and the sampling device is lifted to the ground. Pile hole filling sampling device characterized in that it is configured as follows.
(1) Openings are formed at both ends in the sample container, with one opening as the sample inlet and the other as the outlet.
(2) An inner stopper is inserted into the sample container so that the inner stopper can be moved between the sample inlet and the outlet, and the movement of the inner stopper or the sample container is operated from the ground. First operating means is provided.
(3) The inner plug can block either the sample intake port or the discharge port. Pile hole filling sampling device characterized in that it is configured as follows.
(1) Openings are formed in the upper and lower parts of the sample container, with one opening as the sample intake and the other as the discharge.
(2) A first stopper is inserted into the sample container so that the first stopper can be moved between the sample inlet and the outlet, and the movement of the first stopper or the sample container can be performed from the ground. First operating means for operating is provided.
(3) A second stopper that can be moved is provided in the sample container or outside the sample container, and second operation means capable of operating the movement of the second stopper or the sample container from the ground is connected.
(4) The first stopper or the second stopper can block either the sample inlet or the outlet. Pile hole filling sampling device characterized in that it is configured as follows.
(1) Openings are formed in the upper and lower parts of the sample container, with one opening as the sample intake and the other as the discharge.
(2) An inner stopper is inserted into the sample container, the inner stopper is movable between the sample inlet and the outlet, and the movement of the inner stopper or the sample container is operated from the ground. One operating means is provided.
(3) An outer lid is provided on the outer periphery of the sample container so as to be openable and closable, and a second operating means capable of operating the opening and closing of the outer lid from the ground is connected.
(4) The inner plug or the outer lid can block either the sample inlet or the outlet. The pile hole filling device according to any one of claims 4 to 6, wherein the pile hole filling device is configured as follows.
(1) A connecting portion to be connected to the burying rod is formed at the upper end of the sample container, and the burying rod and the connecting portion have a hollow portion that communicates vertically.
(2) The first operation means connects the lower end portion to the first plug and positions the intermediate portion so that the upper end portion can be operated on the ground through the connection portion and the hollow portion of the excavation rod.

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