JP6961234B2 - Sampling device and sampling method - Google Patents

Description

The present invention is, for example, a sampling apparatus used for collecting an uncured sample immediately after the root compaction is constructed for the purpose of investigating the performance of the root compaction constructed at the bottom of the pile hole. As for the sampling method, the uncured sample of the root compaction built at the bottom of the pile hole can be reliably and easily collected.

In the construction of piles by the pre-boring method and the Nakabori method, as part of the quality control of the pile construction, the uncured sample immediately after the construction of the root compaction part built at the bottom of the pile hole is collected and the root compaction part. Performance is investigated.

For example, in sampling in the pre-boring method, after excavating the tip of a pile and constructing a solidified part with an excavator under a predetermined construction procedure, the excavation rod is once pulled up to the ground and excavated attached to the tip. Replace the bid with a sampler, lower the excavation rod to the root consolidation part at the tip of the pile, collect the sample, and then pull it up to collect the unsolidified sample in the sampler on the ground.

In addition, for sampling in the Nakabori method, piles are sunk by the usual construction method, the root consolidation part is built, the excavation rod is pulled up to the ground, and then the unsolidified sample is collected by the same procedure as in the pre-boring method. to recover.

By the way, various methods have been proposed so far as a sampler for collecting a sample in an uncured state of a root compaction portion. For example, in Patent Document 1, a storage for temporarily storing a filling material in a pile hole (20) is provided. A pile hole in the tank (2) provided with a filling port (3), a collection lid (4) for opening and closing the collection port (3), and an actuator (5) for moving the collection lid (4). The invention of the inner filling collecting device is disclosed.

Further, Patent Document 2 describes a removable bit (12) attached to the tip of the core tube (10), a rod (3) for suppressing the movement of the bit (12), and an over provided at the upper end of the rod (3). The invention of a closed sampler with a locking mechanism (2) that unlocks the lock pin (25) of a movable bit (12) by pulling up the shot catcher (42) and overshot catcher (42) is disclosed. ..

Further, Patent Document 3 describes a cylinder case (5) for collecting soil sample, which is a container for collecting soil sample, a lower elevating guide rail member (4) attached to the lower end of the cylinder case (5), and the same sample collection. Provided on the upper piston (6) and lower piston (7) that move up and down in the cylinder case (5), the linear actuator (8), and the output rod (8b) that protrudes downward from the lower piston (7). An unlocking input member (9) provided, an unlocking instruction member (15) provided in an arrangement linked to the lowered unlocking input member (9), and an upper portion installed on the upper surface of the upper piston (6). A soil sampling device including a frame (12), a drive energy source unit (16) installed inside the upper frame (12), and a lock member (14) installed on the lower surface of the lower piston (7). The invention of is disclosed.

Japanese Unexamined Patent Publication No. 2011-1797 Japanese Patent No. 4478351 Japanese Unexamined Patent Publication No. 2011-47749

It was possible to collect an uncured sample of the root compaction built at the bottom of the pile hole using a conventional sampler, but the sampler does not operate reliably at the bottom of the pile hole. Therefore, the required amount of sample could not be collected, or impurities such as earth and sand were mixed during the collection, and the sample could not be evaluated properly.

In addition, it may not be possible to accurately determine whether the sample was collected at an appropriate position, whether the collection was completed, etc. Furthermore, the structure of the sampler is complicated, the operation is troublesome, and it is an expensive product. There was also a problem.

Further, the sampling device disclosed in Patent Document 1 is not a simple device because it has a hydraulic system because the sampling lid that opens and closes the sampling port is operated by a hydraulic actuator.

Further, since the sampling device disclosed in Patent Document 2 cannot collect the sample in a sealed state, even if the soil sample can be collected and collected, a fluid uncured filler sample such as a root hardening liquid can be appropriately collected. There were problems such as being unable to collect and collect.

The sampling device disclosed in Patent Document 3 is not a simple device like the sampling device of Patent Document 1, because the sample collected by the linear actuator is taken into the cylinder case for sampling.

The present invention has been made to solve the above problems, has a simple structure and operation, can reliably and easily collect an uncured sample filled in a hole, and moreover, earth and sand. It is an object of the present invention to provide a sampling apparatus and a sampling method that enable sampling and recovery without incorporating impurities such as.

The present invention is an invention of a sampling device for collecting an uncured sample of a filling material filled in a hole, and a guide rod extending in the vertical direction and a guide rod extending concentrically on the outside of the guide rod are installed concentrically. The inside of the hole can be raised and lowered along the guide rod, and the inside of the hole is lowered together with the guide rod in a state of hanging downward from the lower end of the guide rod so as to be concentric with the guide rod. A sampling tube that rises in the drilled hole together with the guide rod in an overlapping state, an upper stopper that fixes the sampling tube in a state where the sampling tube hangs down from the lower end of the guide rod, and the above. The sampling tube is provided with a lower stopper for fixing the sampling tube in a state where the sampling tube is concentrically overlapped with the guide rod, and the sampling tube has a sampling port at the upper end, and the guide rod has the above. The lower lid that closes the sampling port and the sampling tube that closes while the sampling tube hangs downward from the lower end of the guide rod opens while rising along the guide rod and overlaps with the guide rod concentrically. At the same time, it is characterized by having an upper lid that closes the sampling port.

A sampling port is provided at the upper end of the sampling tube, and the lower lid and the upper lid are installed above the lower end of the guide rod and the lower end of the guide rod at intervals substantially matching the height of the sampling tube. In addition, by installing the sampling tube so as to be able to move up and down along the guide rod, the sampling port of the sampling tube can be closed by the lower lid while the sampling tube hangs down from the lower end of the guide rod. In addition, the sampling port can be closed by the upper lid in a state where the sampling tube rises and concentrically overlaps with the guide rod in opposition to the lowering of the guide rod. Then, the sampling port can be kept open while the sampling tube rises from the state of hanging from the lower end of the guide rod to the state of concentrically overlapping with the guide rod. As a result, by operating the sampling tube via the guide rod as described above, an uncured sample at an arbitrary depth in the drilled hole can be reliably sampled in a state where earth and sand are mixed. Can be done.

Further, the lower lid and the upper lid that close the sampling port are not opened by the lower spar and the upper stopper, respectively, while the sampling tube is inserted to the bottom of the drilling hole, the sample is collected and pulled up to the ground. By locking in this way, the sampling tube will not open due to the resistance or water pressure of the filling in the drilling hole, so impurities such as fillings and earth and sand at other depths during ascent and descent will not enter.

The upper stopper is provided with, for example, a pair of latches rotatably supported in a range from a vertically upward state to a substantially horizontal state on both sides, and a spring that constantly urges the latch to be substantially horizontal on both sides. The lower stopper is equipped with a pair of latches that are rotatably supported in a range from a vertically downward state to a substantially horizontal state on both sides, and a spring that urges the latch to be substantially horizontal on both sides. Yes, in particular, the upper stopper can be released via the operating rod inserted into the guide rod (see FIG. 1).

In addition, by installing the sampling tube together with the guide rod so that it can rotate in the forward and reverse directions by power, and by installing a stirring blade at the lower end of the sampling tube, it is extremely efficient even in a slightly hardened hole. It can be raised and lowered reliably.

The sampling device of the present invention can be replaced with, for example, a boring rod or a drilling bit attached to the tip of a drilling rod, and a sample can be sampled even during pile construction, and the hole is filled. An uncured sample of the filling can be reliably collected by the following work procedure.

(1) First, the sampling tube is set in a state of hanging below the lower end of the guide lot, and the upper stopper is locked and fixed to the lower end of the guide rod.

(2) Next, the sampling tube is inserted to the bottom of the drilled hole via the guide rod. At that time, a stirring blade is installed at the lower end of the sampling tube, and by moving it up and down in the drilling hole without rotating it by power, the sample can be sampled extremely efficiently even in the deep drilling. be able to.

(3) Next, the upper stopper is released, and the sampling tube is pulled up along the guide rod to a position where the inside of the hole is concentrically overlapped with the guide rod. As a result, the uncured sample in the drilled hole can be taken into the sampling tube from the sampling port.
The upper stopper can be released by pushing the operation rod inserted into the guide rod downward by a certain amount, and by pulling up the operation rod as it is, the sampling tube is concentrically overlapped with the guide rod. Can be pulled up.

(4) Next, the sampling tube is pulled up to the ground surface in the pile hole via the guide rod, and the sample in the sampling tube is collected.

According to the present invention, by pulling up the sampling tube along the guide rod extending in the vertical direction at the inner bottom of the drilling hole, the uncured sample can be pumped directly above and collected from the sampling port, which is necessary. A large amount of sample can be reliably collected.

In addition, the sampling port can be closed by the lower lid while inserting the sampling tube to the bottom of the hole, and by the upper lid while collecting the sample and pulling it up to the ground, and the lower lid and upper lid can be closed. Since each can be locked so as not to be opened by the lower spar and the upper stopper, it is possible to reliably collect the sample at the bottom of the drilled hole without extraneous substances such as earth and sand mixed in. Further, a sample can be collected by connecting to the tip of an excavation rod or a boring rod of an existing excavator.

An embodiment of the sampling apparatus of the present invention is illustrated. FIG. 1 (a) is a vertical cross-sectional view showing a state in which a sampling tube hangs down from the lower end of a guide rod, and FIG. 1 (b) is a bottom view. Is. The state in which the sampling tube of the sampling device shown in FIG. 1 is pulled up along the guide rod is shown. FIG. 2 (a) is a vertical cross-sectional view, and FIGS. 2 (b) and 2 (c) are upper clutches. 2 (b) is a cross-sectional view taken along the line in FIG. 2 (a), and FIG. 2 (c) is a cross-sectional view taken along the line in FIG. 2 (b). FIG. 3 is a vertical cross-sectional view showing a state in which the sampling tube of the sampling device shown in FIG. 1 is raised to a specified dimensional position, the upper lid is fitted to the sampling port, and the sampling port is closed. FIGS. 4 (a), (b), (c), (d), and (e) show the uncured state of the root compaction constructed at the bottom of the pile hole using the sampling device shown in FIG. It is explanatory drawing which shows the construction procedure of the method of collecting a sample. 5 (a), (b), (c), and (d) are explanatory views showing the operation of the sampling tube in particular in the construction procedure of the method for collecting the sample described in FIG.

1 to 3 show an embodiment of the present invention. In the figure, the sampling device 2 of the present invention excavates the tip of an excavating rod or a boring rod 1 of an excavator (not shown). It is installed so that it can be attached and detached in place of the bit (not shown).

The sampling device 2 is connected to the tip of the excavation rod 1 and is constructed at the bottom of the pile hole A and the guide rod 3 which rises, descends and rotates together with the excavation rod 1 in the pile hole A excavated by the excavation bit. It is provided with a sampling tube 4 for collecting a sample in an unsolidified state of the root consolidation portion B, and an operation rod 6 for releasing the upper stopper 5 described later of the sampling tube 4.

The guide rod 3 is formed in a cylindrical shape, and a lower lid 7 and an upper lid 8 for closing the sampling port 4a of the sampling tube 4 are installed at the tip thereof, respectively.

The lower lid 7 and the upper lid 8 are formed in a flange shape protruding in the direction perpendicular to the tube axis of the guide rod 3, have a size inscribed in the sampling tube 4, and are a sampling tube in the tube axis direction of the guide rod 3. It is formed at approximately the same interval as the height of 4.

Further, on the lower lid 7, the main (power) side disk 10 of the upper power transmission means (hereinafter referred to as “upper clutch”) 9A and the lower power transmission means (hereinafter referred to as “upper clutch”) 9A for transmitting and blocking the rotational force of the guide rod 3 to the sampling tube 4 (hereinafter referred to as “upper clutch”). Hereinafter, the main (power) side disc 11 of 9B (“lower clutch”) is installed.

The sampling tube 4 includes an inner tube 12 and an outer tube 13, the outer diameter of the inner tube 12 is smaller than the inner diameter of the guide rod 3, the inner diameter of the outer tube 13 is larger than the outer diameter of the guide rod 3, and the sampling tube 4 is formed. The inner pipe 12 and the outer pipe 13 are installed concentrically in a plan view on the center line passing through the axis of the guide rod 3.

Further, an extension tube 14 extending above the lower lid 7 is installed at the upper end of the outer tube 13, and a bottom lid 15 for closing the lower end of the outer tube 13 is installed at the lower end, and the outer tube 13 is the main body of the sampling tube 4. , The upper end is a sampling port 4a that opens directly above.

Further, the driven side disc 16 of the upper clutch 9A and the driven side disc 17 of the lower clutch 9B are installed on the inside of the extension pipe 14 and the upper surface of the bottom lid 15, and the inside of the pile hole A is further stirred at the lower end of the bottom lid 15. A stirring blade 18 is installed.

The upper stopper 5 has a support pin 5a horizontally supported at the upper end of the inner pipe 12 in the direction perpendicular to the pipe axis of the inner pipe 12 in a range of approximately 90 ° from a vertically upward state to both sides of the inner pipe 12 with respect to the rotation axis. It is provided with a pair of latches 5b, 5b that can rotate and project, and a spring 5c that constantly urges the latches 5b, 5b so as to project symmetrically and substantially horizontally on both sides of the inner tube 12. Further, the lower stopper 19 is installed at the lower end of the inner pipe 12 symmetrical to the position of the upper stopper 5.

The lower stopper 19 has a support pin 19a horizontally supported at the lower end of the inner pipe 12 in the direction perpendicular to the pipe axis of the inner pipe 12 in a range of approximately 90 ° from a vertically downward state to both sides of the inner pipe 12 with respect to the rotation axis. It is provided with a pair of latches 19b and 19b that can be rotated and projected, and a spring 19c that constantly urges the latches 19b and 19b so as to project symmetrically and substantially horizontally on both sides of the inner pipe 12.

When the sampling tube 4 hangs down from the lower end of the guide rod 3 and the lower lid 7 is installed at the sampling port 4a, the latches 5b and 5b of the upper stopper 5 are the lower lids 7. The sampling tube 4 does not move upward because it projects and opens almost horizontally on both sides of the inner tube 12 on the lower side.

Further, when the sampling tube 4 is concentrically overlapped with the guide rod 3 and the upper lid 8 is installed at the sampling port 4a, the latches 19b and 19b of the lower stopper 19 are above the lower lid 7. In, the sampling tube 4 does not move downward because it projects and opens almost horizontally on both sides of the inner tube 12.

The operation rod 6 is installed so as to continuously penetrate the excavation rod 1 and the guide rod 3, and is attached to the tip portion of the operation rod 6 via an operation spear 20 and a taper cap 21. Is connected to.

In such a configuration, when the sampling tube 4 is in a state of hanging from the lower end of the guide rod 3, the lower lid 7 is installed at the sampling port 4a of the sampling tube 4 and is not moved by the upper stopper 5. Locked to.

As a result, while the sampling pipe 4 is inserted into the bottom of the pile hole A via the guide rod 3, even if resistance or water pressure due to the filling in the pile hole A is received, the sampling pipe 4 is lowered by the lowering of the guide rod 3. Does not move and sediment or the like does not flow into the sampling tube 4. Further, the driving side disc 10 and the driven side disc 16 of the upper clutch 9A are connected, and the sampling pipe 4 can be reliably rotated together with the rotating rod 3 by the power of the excavator (FIGS. 2 (b) and 2 (c)). reference).

The main drive side disc 10 and the driven side disc 16 of the upper clutch 9A are installed so as to alternately mesh with each other in the circumferential direction of the guide rod 3, as shown in FIGS. 2 (b) and 2 (c), for example. The rotational force of the guide rod 3 can be transmitted to the sampling tube 4 by engaging from the vertical direction, and the rotational force of the guide rod 3 is cut off by separating the driving side disc 10 and the driven side disc 16 in the vertical direction. can do.

On the other hand, by pushing the upper stopper 5 downward through the operation rod 6, the latches 5b and 5b of the upper stopper 5 can be contracted to a diameter smaller than the outer diameter of the inner pipe 12, and the upper stopper 5 can be removed from the lower surface of the lower lid 7 for operation. The sampling tube 4 can be pulled up via the rod 6.

Further, while the sampling tube 4 is pulled up via the operation rod 6, the sampling tube 4 rises from the sampling port 4a on the lower lid 7, so that the sample can be taken into the sampling tube 4.

At a position where the sampling tube 4 is raised by a specified dimension, the upper lid 8 is fitted into the sampling port 4a and the sampling port 4a is closed, so that sediment and the like do not enter the sampling tube 4 thereafter. Further, when a sample is collected in the sampling tube 4 and pulled up to the ground, the latches 19b and 19b of the lower stopper 19 project symmetrically to both sides of the inner tube 12 on the upper side of the lower lid 7, so that the sampling tube 4 Does not fall along the guide rod 3.

It should be noted that the bottom lid 15 abuts against the lower lid 7 and the sampling tube 4 moves by a specified dimension by the pulling length of the operation rod 6, and the sampling tube 4 normally operates in the pile hole A to collect a sample. You can confirm that you have done so.

Further, the sampling tube 4 is provided with a stirring blade 18 at the lower end of the sampling tube 4, and the main disk 11 and the driven disk 17 of the lower clutch 9B mesh with each other, so that the sampling tube 4 can rotate together with the rotating rod 3. As a result, even in the slightly hardened hole A, it can be easily pulled up to the ground (see FIG. 3).

The unevenness of the driving side disk 11 of the lower clutch 9B and the unevenness of the driven side disk 17 strongly mesh with each other in the tube axis direction of the guide rod 3, and the rotational force of the guide rod 3 is transmitted to the sampling tube 4 by the shear resistance. Can be done (see Figure 3).

Reference numerals 22 and 23 are O-rings and spacer rings that seal the gap between the sampling port 4a of the sampling tube 4 and the lower lid 7 and the upper lid 8, respectively, and reference numeral 24 is a guide from the sampling tube 4. This is an eyebolt for hooking a jig (not shown) when removing the rod 3.

In such a configuration, next, a method of collecting an uncured sample of the root compaction portion B constructed at the bottom of the pile hole A by using the sampling device 2 of the present invention will be described.

(1) First, the pile hole A is excavated by an excavator (not shown), a rooting portion B is constructed at the bottom of the pile hole A, and then the excavator rod 1 of the excavator is pulled up from the pile hole A. Then, the excavation bit (not shown) connected to the tip of the excavation rod 1 is replaced with the sampling device 2 of the present invention.

At that time, by installing the sampling tube 4 in a hanging state at the lower end of the guide rod 3, the sampling port 4a of the sampling tube 4 is opened on the lower lid 7, and the lower lid 7 is also opened. Is locked by the upper stopper 5 so as not to move.

Further, the driving side disc 10 and the driven side disc 16 of the upper clutch 9A are alternately meshed with each other in the circumferential direction of the guide rod 3, and the guide rod 3 and the sampling tube 4 are connected to transmit the rotational force, whereby the sampling tube is connected. 4 receives the rotational force of the excavation rod 1 and can rotate together with the excavation rod 1 and the guide rod 3.

(2) Next, the sampling device 2 connected to the tip of the excavation rod 1 is inserted into the pile hole A while rotating to the bottom of the pile hole A, and is not built at the bottom of the pile hole A. It is pushed into the hardened root compaction portion B to stop the rotation of the sampling tube 4.

While the sampling tube 4 is inserted to the bottom of the pile hole A and pushed into the uncured root consolidation portion B, the sampling tube 4 receives an upward resistance, but at the lower end of the guide rod 3. Since it is fixed by the upper stopper 5, it does not move.

(3) Next, while rotating the operating rod 6, push it slightly downward to remove the upper stopper 5 from the lower surface of the lower lid 7, and then pull up the sampling tube 4 to the specified size via the operating rod 6 as it is.

When the sampling tube 4 is pulled up, the sample can be taken into the sampling tube 4 from the sampling port 4a on the lower lid 7. Further, the sampling tube 4 rises along the guide rod 3, and the upper lid 8 is fitted into the sampling port 4a at the specified dimensional position, so that the sampling port 4a is closed. After that, earth and sand do not enter the sampling tube 4.

(4) Next, the inside of the pile hole A is pulled up to the ground while rotating the sampling pipe 4 again via the excavation rod 2 and the guide 3. Then, after removing the guide rod 3 from the outer tube 13 of the sampling tube 4, the upper lid 8 is removed to collect the sample in the outer tube 13.

It should be noted that the bottom lid 15 abuts against the lower lid 7 and it is confirmed by the pull-up length of the operation rod 6 that the sampling tube 4 has moved by a specified dimension, and at the same time, the main drive side disk 11 and the driven side disk 17 of the clutch 9 mesh with each other. Since the rotational force of the guide rod 3 is transmitted to the sampling tube 4 by the shear resistance, the sampling tube 4 can be rotated. Further, while the sampling pipe 4 is pulled up in the pile hole A to the ground, the sampling port 4a is completely closed by the upper lid 8 so that earth and sand do not infiltrate into the sampling pipe 4.

By the above work procedure, a required amount of an uncured sample of the root compaction portion B constructed at the bottom of the pile hole A can be reliably collected.

INDUSTRIAL APPLICABILITY According to the present invention, an uncured sample of a root compaction portion built at the bottom of a pile hole can be reliably collected without fillings of other depths, earth and sand, and the like.

1 Excavation rod 2 Soil sampling device 3 Guide rod 4 Sampling pipe
4a Sampling port 5 Upper stopper
5a support pin
5b latch
5c Spring 6 Operation rod 7 Lower lid 8 Upper lid
9A Upper clutch (upper power transmission means)
9B Lower clutch (upper power transmission means)
10 Drive (power) side disc
11 Drive (power) side disc
12 inner tube
13 Outer pipe
14 Extension tube
15 Bottom lid
16 Driven disk
17 Driven disk
18 Stirring blade
19 Lower stopper
19a support pin
19b latch
19c spring
20 Operation spear
21 Tapered cap
22 O-ring
23 spacer ring
24 Eyebolt A Pile hole (drilling)
B Root consolidation part

Claims (7)

A sampling device for collecting an uncured sample of a filling material filled in a hole, which is concentrically installed on the outside of a guide rod extending in the vertical direction and the hole. The inside can be raised and lowered along the guide rod, and the inside of the hole is lowered together with the guide rod in a state of hanging downward from the lower end of the guide rod, and the inside is concentrically overlapped with the guide rod. The sampling tube that rises in the drilled hole together with the guide rod, the upper stopper that fixes the sampling tube in a state where the sampling tube hangs down from the lower end of the guide rod, and the sampling tube are described. The guide rod is provided with a lower stopper for fixing the sampling tube in a state of being concentrically overlapped with the guide rod, the sampling tube has a sampling port at the upper end, and the guide rod has the sampling tube. When the sampling port is on the lower lid in a state of hanging downward from the lower end of the guide rod, and the uncured sample on the lower lid is taken in while the sampling tube rises along the guide rod. A sampling device including an upper lid that closes the sampling port at the same time. In the sampling device according to claim 1, the upper stopper includes a pair of latches pivotally supported from a vertically upward state to a substantially horizontal state on both sides, and a spring for urging the latches in a substantially horizontal state on both sides. The stopper is a sampling device including a pair of latches pivotally supported on both sides from a vertically downward state and a spring for urging the latches in a substantially horizontal state on both sides. The sampling device according to claim 1 or 2, wherein an operation rod for releasing the upper stopper is inserted into the guide rod. The sampling device according to any one of claims 1 to 3, wherein the sampling tube is rotatably installed together with the guide rod by power. The sampling device according to claim 4, further comprising a power transmission means for transmitting and blocking the rotational force of the guide rod to the sampling tube. The sampling device according to any one of claims 1 to 5, wherein a stirring blade for stirring the inside of the hole is provided at the lower end of the sampling tube. A sampling method comprising the following steps in a sampling method for sampling an uncured sample in a hole using the sampling device according to any one of claims 1 to 6.
(1) Set the sampling tube in a state of downwardly depending from the lower end of the Gaidoro' de, it locks the upper stopper step.
(2) A step of inserting the sampling tube into the hole through the guide rod to the bottom of the hole.
(3) A step of releasing the stopper and pulling the sampling tube along the guide rod to a specified dimension.
(4) A step of pulling the sampling tube up to the ground surface in the drilled hole via the guide rod.

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