JP2010261175A - Sampling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structurally-simple sampling device capable of surely sampling a filler at a predetermined depth. <P>SOLUTION: This sampling device for collecting a sample of soil cement from the ground includes a bottomed tubular body 10 and a working shaft 20 for moving the tubular body 10 upward and downward. The tubular body 10 has a top-surface flange 12 with an opening wider than the penetrating working shaft 20, while the working shaft 20 comprises an upper flange 22 and a sliding flange 24 with a through-hole 24a. An undersurface of the upper flange 22 abuts on the top-surface flange 12 at a lowered position of the working shaft 20. Also, the sliding flange 24 is freely slidable along an inner wall of the tubular body 10, and abuts on an undersurface of the top-surface flange 12 in an upper position of the working shaft 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a collection device for collecting a sample before solidifying, for example, a soil cement formed by mixing filler material, for example, cement milk and soil, introduced into a borehole.

  When building a building, for example, a method using cement milk in a ready-made concrete pile, or a soil cement formed from cast cement milk and soil in the construction of a soil cement synthetic steel pipe pile that digs the ground and embeds the ready-made pipe In order to measure the strength of the soil cement, it is known that the soil cement is collected before solidifying.

For example, in order to collect cement formed by injecting cement-based solidifying material slurry into a drilling hole provided in the ground, the sampling member is attached to an insertion member made of H-shaped steel, and the insertion member is lowered to the drilling hole with a crane or the like, A collecting device for collecting a soil cement sample is known (see Patent Document 1).
As shown in FIG. 4, the sampling device is composed of a cylindrical container 1 having upper and lower openings 1a and 1b, and a lid 2 is swingably attached to the lower opening 1a. When the container 1 is lowered, the soil cement opens the lid 2, and when it is raised, the lid 2 is closed by the load of the cement soil to collect a soil cement sample.

  In addition, in the agitation equipment for soil improvement that constructs soil cement pillars in the ground, a sampler for collecting soil cement samples formed in the shape of a bottomed cylinder is swingably attached to the agitation blade, and the rotation direction of the excavation shaft The sampler is opened and closed in accordance with the above, and a sample is collected at a predetermined depth (see Patent Document 2).

Furthermore, the apparatus shown in FIG. 5 is also known as an apparatus for collecting a soil cement sample formed by burying a ready-made pile in an excavation hole formed by excavating the ground and injecting cement milk into the excavation hole. (See Patent Document 3).
In this apparatus, an opening inner window 6 is formed in a hopper 5 that accommodates a sample, and an outer frame 8 having an outer window 7 is fitted into the hopper 5, and the outer frame 8 is attached to the bottom of the excavation hole. The hopper 5 is moved down against the spring 9 to align the inner and outer windows 6 and 7 to take in soil cement, and when the hopper 5 is pulled up, the position of the inner and outer windows 6 and 7 is shifted by the force of the spring 9. Thus, the soil cement sample is enclosed in the hopper 5 and taken out.

However, since the sampling device described in Patent Document 1 uses all soil cement for opening and closing the lid, there is no guarantee that the lid is securely closed when the lid is opened and closed, particularly when the soil cement is housed inside. Or if it takes time to close, the soil cement contained in it will be replaced with something closer to the ground.
Since the stirring apparatus described in Patent Document 2 is configured on the premise that it is attached to a stirring blade, it cannot be said that it is easy to use because it does not have versatility with respect to those having no stirring blade.
The apparatus described in Patent Document 3 has a complicated structure, and in this configuration, soil cement can be collected only when the outer frame is settled in the excavation hole, and the collection position (depth) can be freely set. If you want to, there is a problem that it is difficult to use.

JP-A-2005-76200 JP 2008-25247 A JP 2001-73360 A

  The present invention has been made in view of the above-described conventional problems of a sampling device, and an object thereof is to provide a sampling device that can reliably collect a filler at a predetermined depth with a simple structure.

The invention of claim 1 is a collecting device for collecting a sample of a filling material from the ground, comprising a bottomed cylindrical body and an operating shaft for moving the cylindrical body up and down, and the cylindrical body Has an upper surface flange provided with an opening larger than the operating shaft penetrating in the upper surface center portion, the operating shaft has an upper flange provided at a predetermined distance and a sliding flange having a through hole, The upper flange is in contact with the upper surface flange at the lowering position of the operating shaft, and the sliding flange is slidable along the inner wall of the cylindrical body. This is a sampling device that abuts the lower surface.
A second aspect of the present invention is the sampling apparatus according to the first aspect, wherein the lower flange is in contact with the bottom surface of the cylindrical body at the lowered position of the operating shaft.
The invention of claim 3 is a collection device for collecting a sample of a filling material from the ground, comprising a bottomed cylindrical body and a vertically movable operating shaft, the cylindrical body having a bottom hole. The operating shaft has a lower flange vertically extending through the cylindrical body and a sliding flange that is slidable up and down along the inner peripheral surface of the cylindrical body. The sliding flange closes the bottom hole when the tubular body is relatively raised, and the lower flange closes the bottom hole when the tubular body is relatively lowered, and closes the bottom hole when the tubular body is relatively raised. It is the collection device characterized by opening.
According to a fourth aspect of the present invention, there is provided the sampling apparatus according to the third aspect, further comprising drive means for driving the cylindrical body to be movable relative to the operating shaft.
The invention according to claim 5 is the sampling device according to claim 3 or 4, wherein the operating shaft has an upper flange at a position above the cylindrical body, and the upper flange and the cylindrical body are opened. A sampling device characterized in that a stretchable sealing member is provided between the side portions.

  According to the present invention, a soil cement sample can be reliably collected at a desired depth with a simple configuration.

It is sectional drawing of the sampling device which concerns on 1st Embodiment of this invention, FIG. 1A is in the soil cement in the descent | fall, FIG. 1B shows the sampling device in the same raise. FIG. 2A is a cross-sectional view of a sampling device according to a second embodiment of the present invention, FIG. 2A shows a sampling device that is descending in soil cement, FIG. 2B is that the sample soil cement is being collected, and FIG. 2D and 2E each show a variation of the top flange of the tubular body. It is sectional drawing of the sampling device which concerns on 3rd Embodiment of this invention, FIG. 3A is descending in soil cement, FIG. 3B shows the sampling device during the sampling soil cement collection. It is a perspective view of the conventional collection device. It is a front view which shows the other conventional collection apparatus.

A soil cement collecting device according to an embodiment of the present invention will be described with reference to the accompanying drawings.
In any of the sampling devices according to the present embodiment, for example, a ready-made pipe is embedded in an excavated hole, and a sample is collected in order to determine the bearing capacity of the soil cement formed by injecting cement milk into the excavated hole. It is attached to the lower end of the working shaft 20 attached to the excavation shaft of a crane or excavator, and samples the soil cement at a predetermined depth by the vertical movement of the working shaft 20. is there.

(First embodiment)
FIG. 1 is a cross-sectional view of a soil cement collecting device according to a first embodiment of the present invention. FIG. 1A shows a state where the sampling device is descending in the soil cement, and FIG. 1B shows a state where the soil cement is rising. Show.
As shown in the figure, the sampling device includes a bottomed cylindrical body 10 and an operating shaft 20 that moves the cylindrical body 10 up and down.

  The cylindrical body 10 may have a cylindrical shape, a rectangular tube shape, or any other shape. A wide upper surface flange 12 is formed on the upper surface of the cylindrical body 10, and an opening 12a is formed in the center thereof. The opening 12a is penetrated by the operating shaft 20, and a clearance sufficient for the soil cement to flow around is provided.

The operating shaft 20 has an upper flange 22 and a sliding flange 24 provided at a predetermined interval downward from the upper flange 22. The sliding flange 24 has one or a plurality of through holes 24a, and the outer peripheral surface of the sliding flange 24 extends along the inner peripheral wall of the cylindrical body 10 so that the cylindrical body 10 is related to the piston and the cylinder. It is slidably arranged to bisect.
Therefore, the outer peripheral shape of the lower flange 24 is formed to be the same as the inner peripheral shape of the cylindrical body 10.

  The upper flange 22 of the operating shaft 20 is large enough to close the opening 12a at the center when the operating shaft 20 descends in the cylindrical body 10 and the upper flange 22 contacts the upper surface flange 12 of the cylindrical body 10. Or is formed into a shape. The distance between the upper flange 22 and the sliding flange 24 is such that when the upper flange 22 abuts against the upper surface flange 12 and closes the opening 12a at the center, the sliding flange 24 is closed to the bottom 14 of the cylindrical body 10. Is preferably positioned so that the sliding flange 24 does not contact the bottom 14 of the tubular body 10 before closing the opening 12a with the upper flange 22. It is necessary to adjust.

Next, the operation of this sampling apparatus will be described.
When the operating shaft 20 of the sampling apparatus is attached to the excavating shaft of a crane or an excavator, for example, and the operating shaft 20 is lowered, the upper flange 22 of the operating shaft 20 abuts on the upper surface flange 12 of the cylindrical body 10 and its center. The opening 12a of the part is closed. At this time, as described above, the sliding flange 24 is in a position where it contacts or substantially contacts the bottom 14 of the cylindrical body 10.
FIG. 1A shows this state. In this state, the operating shaft 20 is lowered, so that the sampling device is lowered in the soil cement formed in the excavation hole.

  When the cylindrical body 10 is lowered and reaches a predetermined depth, the lowering of the operating shaft 20 is stopped, and then the operating shaft 20 is raised. When the operating shaft 20 starts to rise, the upper flange 22 is separated from the upper surface flange 12, and the sliding flange 24 is also separated from the bottom portion 14 of the cylindrical body 10 almost simultaneously. As the operating shaft 20 continues to rise, the surrounding soil cement flows into the cylindrical body 10 through the opening 12a from the gap formed between the upper flange 22 and the upper surface flange 12. The soil cement that has flowed in flows into the cavity (space) formed between the sliding flange 24 and the bottom portion 14 through the through hole 24a of the sliding flange 24 that is rising in the cylindrical body. The inflow of the soil cement into the space through the through hole 24a continues until the sliding flange 24 comes into contact with the lower surface of the upper surface flange 12 and the sliding flange 24 closes the opening 12a. After the sliding flange 24 comes into contact with the lower surface of the upper surface flange 12, the cylindrical body 10 also rises as the operating shaft 20 rises.

In this manner, the cylindrical body 10 is filled with soil cement at a predetermined depth, and the cylindrical body 10 is pulled up to the ground as the operating shaft 20 rises. Since the cylindrical body 10 containing the soil cement sample collected at a predetermined depth is in a sealed state when pulled up, the soil cement sample at the top of the cylindrical body 10 is replaced with the soil cement above the excavation hole when pulled up. There is no fear and it can be recovered in a complete state.
In this embodiment, the soil cement at a predetermined depth can be reliably collected while having an extremely simple structure.

(Second Embodiment)
FIG. 2 is a cross-sectional view of a soil cement collecting device according to a second embodiment of the present invention. FIG. 2A shows a state where the sampling device is descending in the soil cement, and FIG. 2B shows that the soil cement is being collected. FIG. 2C shows a state where the soil cement sample has been collected. Moreover, FIG. 2D and 2E show the modification of the upper surface flange of a cylindrical body, respectively.

As in the first embodiment, the sampling device of the present embodiment has a bottomed tubular body 10 and the operating shaft 20 and the tubular body 10 of the tubular body 10 with respect to the operating shaft 20 as shown in the figure. For example, the drive rod 30 is driven by a known drive device such as a hydraulic drive device (not shown) fixed to the operating shaft 20.
A wide upper surface flange 12 is formed on the open upper surface of the cylindrical body 10, but unlike the first embodiment, the upper surface flange 12 is only on the outer side of the open end surface of the cylindrical body 10. The bottom portion 14 is provided with a bottom hole 14a for taking in the soil cement at a predetermined sampling position into the cylindrical body 10.

The operating shaft 20 passes through the cylindrical body 10, and a lower flange 26 is provided at the lower end of the operating shaft 20. And a sliding flange 24 that slides along.
Here, the lower flange 26 is in contact with the bottom 14 rear surface of the cylindrical body 10 when the cylindrical body 10 is lowered with respect to the operating shaft 20 and has a width that can close the bottom hole 14a. The shape and the like are arbitrary.

The sliding flange 24 is slidable in the cylindrical body 10 along the inner peripheral wall of the cylindrical body 10 so as to bisect the cylindrical body 10, so to speak, in a relationship between a piston and a cylinder. Has been placed. In other words, the sliding flange 24 has the same configuration as the sliding flange 24 of the first embodiment, but unlike the sliding flange 24, it does not have a through hole and has a cylindrical body. 10 is in contact with the bottom 14 from the upper surface side.
The distance between the sliding flange 24 and the lower flange 26 is configured to be equal to or shorter than the depth of the cylindrical body 10. Therefore, when the cylindrical body 10 is lowered with respect to the drive rod 30 and the lower flange 26 comes into contact with the back surface of the bottom portion 14 of the cylindrical body 10, the sliding flange 24 does not come off from the cylindrical body 10.

In the above embodiment, the upper surface flange 12 is formed so as to extend inward of the open end surface of the cylindrical body 10 as shown in FIG. 2D, or the upper surface flange 12 is formed on the upper surface thereof as shown in FIG. 2E. The flange 12a extending inward of the open end of the body 10 can be configured to be integrally attached by, for example, welding.
When the upper surface flange is configured as described above, as will be described later, when the tubular body 10 is lowered relative to the operating shaft 20, the upper surface of the sliding flange 24 is inward of the open end surface of the tubular body 10. The cylindrical body 10 in a state in which the soil cement sample is accommodated can be sealed by abutting against the lower surface of the flange extending to the surface. In that case, the sealing performance can be further improved by disposing the packing material on any one of the contact surfaces of the flange and the sliding flange 24 extending inward of the open end surface.

Next, the operation of this sampling apparatus will be described.
The operating shaft 20 of the sampling apparatus is attached to the excavating shaft of, for example, a crane or an excavator, and the cylindrical body 10 is pulled up with respect to the operating shaft 20 by the drive rod 30, and as shown in FIG. In a state where 24 contacts the bottom 14 of the cylindrical body 10 and closes the bottom hole 14a, the inside of the soil cement provided in the excavation hole is lowered. In this state, since the bottom hole 14a of the cylindrical body 10 is closed by the sliding flange 24, the soil cement does not flow into the cylindrical body 10 from the bottom hole 14a during lowering. On the other hand, soil cement flows into the cylindrical body 10 from the upper open end, and the sampling device is lowered to a predetermined depth in this state.

When the collection device reaches a predetermined depth, the descent of the collection device is stopped. Next, when the cylindrical body 10 is lowered by operating a driving rod 30 (not shown) fixed to the operating shaft 20, the operating shaft 20 (and hence the sliding flange 24) and the cylindrical body 10 move relative to each other. As shown in FIG. 2B, the sliding flange 20 is separated from the upper surface of the bottom portion 14.
When the sliding flange 20 is separated from the upper surface of the bottom portion 14, a space (cavity) is formed between the bottom surface 14 of the cylindrical body 10 and the sliding flange 20, and the bottom hole 14a of the bottom surface 14 is opened. Soil cement flows in as shown by arrow S. This inflow of the soil cement continues until the cylindrical body 10 is lowered and its bottom surface 14 comes into contact with the lower flange 26 to close the bottom hole 14a.
In this way, a soil cement sample at a predetermined position in the excavation hole is collected.

When the cylindrical body 10 is lowered and its bottom surface 14 comes into contact with the lower flange 26, the drive of the drive rod 30 is stopped. In this state, as shown in FIG. 2C, the soil cement sample is accommodated in the cylindrical body 10, and the upper surface of the cylindrical body 10 is closed by the sliding flange 24, and contact with the outside is cut off. Therefore, the cylindrical body 10 is maintained as it is and is raised to the soil cement sample collection position.
When the tubular body 10 reaches the soil cement sample collection position, the drive rod 30 is actuated by a drive mechanism (not shown) to raise the tubular body 10, whereby the soil cement sample is placed on the bottom 14 of the tubular body 10. It is pushed out from the bottom hole 14a into the sample collection container. The cylindrical body 10 and the like are washed with water in preparation for the next operation as necessary.

In the above description, the drive rod 30 driven by a known drive device such as a hydraulic drive device is used as a mechanism for sliding the cylindrical body 10 relative to the operating shaft 20 (relative sliding). However, this mechanism is not always necessary.
That is, when the cylindrical body 10 is lowered in the soil cement, the cylindrical body 10 is moved to the operating shaft 20 by a force in which the sliding flange 24 of the lowering operating shaft 20 contacts the bottom portion 14 of the cylindrical body 10 and pushes it down. It is raised relatively.
Next, when the cylindrical body 10 is lowered to a predetermined depth to stop the lowering of the operating shaft 20 and then the operating shaft 20 is pulled up, the cylindrical body 10 reacts with its own weight and the soil cement acting on the upper surface flange 12 thereof. (Because the soil cement is not very fluid, the soil cement itself gives a downward force to the upper surface flange 12 of the cylindrical body 10. This force is referred to as a reaction force). The soil cement descends relative to the bottom hole 14a of the bottom portion 14, and the soil cement for the sample is taken into the cylindrical body 10 surrounded by the cylindrical body 10 and the sliding flange 24.

  When the cylindrical body 10 reaches the position for collecting the soil cement sample, the soil cement sample is removed from the bottom hole 14 a of the bottom portion 14 of the cylindrical body 10 by lowering the operating shaft 20 relative to the cylindrical body 10. It is pushed into the sample collection container.

(Third embodiment)
FIG. 3A is a cross-sectional view of a soil cement collecting device according to a third embodiment of the present invention, FIG. 3A is a state in which the sampling device is descending in the soil cement, and FIG. 3B is collecting the soil cement. Shows the state.
The third embodiment basically has the same structure as that of the second embodiment, but the operation shaft 20 is further provided with an upper flange 22, and the lower surface of the upper flange 22 and the upper surface flange 12 of the cylindrical body 10 are provided. The difference is that the bellows 32 is disposed between the upper surfaces (not necessarily the upper surface of the upper surface flange but the upper end side portion of the cylindrical body).

  That is, the state of FIG. 3A is a state in which the soil cement is descending toward a predetermined sampling position, and the bottom surface of the sliding flange 24 comes into contact with the top surface of the bottom portion 14 of the cylindrical body 10 and the bottom hole 14a. Is closed to prevent the soil cement from flowing into the tubular body 10, while the bellows 32 attached between the lower surface of the upper flange 22 and the upper surface of the upper surface flange 12 blocks the upper surface of the tubular body 10. The soil cement is prevented from flowing into the body 10 from above.

  Also in this embodiment, when the collection device reaches a predetermined depth, the descent of the collection device is stopped. Next, when the driving rod 30 is actuated to lower the cylindrical body 10 and the sliding flange 24 is separated from the upper surface of the bottom portion 14, the soil cement flows from the bottom hole 14a. At the same time, when the upper flange 22 is raised, the bellows expands, and the air in the cylindrical body 10 moves into the expanded bellows. Other operations are the same as in the second embodiment.

  As described above, in the second and third embodiments, the cylindrical body 10 is described as being attached to be relatively movable with respect to the operating shaft 20, but the cylindrical body 10 is attached to the excavation shaft of a crane or an excavator, The operating shaft 20 may be attached to the cylindrical body 10 by a drive mechanism so as to be relatively movable.

DESCRIPTION OF SYMBOLS 10 ... Cylindrical body, 12 ... Top surface flange of (cylindrical body), 14 ... Bottom part of (cylindrical body), 14a ... Bottom hole, 20 ... Operating shaft, 22 ... -Upper flange, 24 ... sliding flange, 24a ... through hole, 26 ... lower flange, 30 ... drive rod, 32 ... bellows.

Claims (5)

  A collecting device for collecting a sample of a filling material from the ground, comprising a bottomed cylindrical body and an operating shaft for moving the cylindrical body up and down, and the cylindrical body penetrates through the center of the upper surface An upper flange having an opening larger than the operating shaft, the operating shaft having an upper flange provided at a predetermined distance and a sliding flange having a through hole, and the upper flange is provided on the operating shaft. The lower surface is in contact with the upper surface flange at the lowered position, and the sliding flange is slidable along the inner wall of the cylindrical body, and is in contact with the lower surface of the upper surface flange at the raised position of the operating shaft. Sampling device. The collection device according to claim 1,
The lower flange is in contact with the bottom surface of the cylindrical body at the lowered position of the operating shaft. A collecting device for collecting a sample of a filling from the ground,
It consists of a cylindrical body with a bottom and an operating shaft that can move up and down, and the cylindrical body has a bottom portion with a bottom hole, and the operating shaft passes through the cylindrical body vertically and at its lower end. A lower flange provided, and a sliding flange that is slidable up and down along the inner peripheral surface of the cylindrical body, the sliding flange closing the bottom hole when the cylindrical body is relatively raised, and The lower flange closes the bottom hole when the cylindrical body is relatively lowered, and opens the bottom hole when the cylindrical body is relatively raised. The sampling device according to claim 3, further comprising a driving means for driving the cylindrical body to be movable relative to the operating shaft. In the collection device according to claim 3 or 4,
The operating shaft has an upper flange at a position above the cylindrical body, and a sampling member provided with a retractable sealing member between the upper flange and the open side portion of the cylindrical body is provided. apparatus.

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