JP2747448B2 - Ground sampling tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground sampling tube used for collecting a sample from the ground.

[0002]

2. Description of the Related Art Ordinary boring survey (standard penetration test)
Uses a machine tool weighing 500 kg to 1,000 kg to perform a hit test and data collection, confirm the hardness and softness of the geology at the original position of the survey and the material of the sample, and perform highly accurate soil determination. On the other hand, in the geological survey for the construction of the foundation of a low-rise building or a house, there is a survey method called a Swedish sounding method, which is performed by a human power or a semi-automatic machine (about 200 kg including a weight). Judgment by this survey does not come out of the estimation area because it does not involve the collection of soil samples.
It is at a lower level than the boring survey. Recently, studies have been conducted on the problem of workability, and as a method of collecting samples from each layer of the soil cement column, a sample is taken by a boring machine at a soft place immediately after construction, It is common to use a boring machine after consolidation, and studies on soundness by reflected waves and the like are also being studied. Above all, in a soil cement column, a method of collecting a soft sample immediately after construction is effective in reflecting the following product, and there is a strong demand for establishing a method capable of ensuring more sound workability.

[0003]

However, portable equipment, such as a Swedish sounding machine, has a small penetrating device, so that it is difficult to prepare a sampling tube.
Furthermore, it is difficult to take a structure for preventing the intrusion of the sample at a depth other than the predetermined depth, and there has been no such structure to date.

The present invention has been made in view of the above-mentioned circumstances, and has a shape capable of tracing a hole previously drilled at a screw point and penetrating the hole to a predetermined depth, and having a lid having an outer diameter of the screw point. An object of the present invention is to provide a ground sampling tube configured to be able to collect and collect a sample without protruding from a range.

[0005]

A ground material collecting cylinder according to the present invention, which has been made to solve the above-mentioned problems, is connected to a bottom of a collecting cylinder main body having a bottomed cylindrical shape so as to be attached to a tip of a penetrating tool. And a groove is provided on the inner edge of the tip of the sampling cylinder main body, which is a sampling port, and an edge of a lid for sealing the sampling port is elastically engaged with the groove. On the inner edge of the tip of the sampling tube body, which is the sampling port, a plurality of hooks composed of a pair of sandwiching pieces arranged in front and rear are disposed on average over the entire circumference, and between the pair of holding pieces. Comprises a lid that closes the sampling port,
At the edge of the lid, a notch having substantially the same shape as the holding piece is provided in the same positional relationship as each of the hooks, and a stop plate is erected on the lid along the edge of the notch in the reverse direction. In some cases, you may use what you have done.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a ground sampling tube according to the present invention will be described below based on an example in which it is mounted on the tip of a penetrating tool 2 for a Swedish sounding survey. FIG. 5 is a schematic diagram showing an example of an apparatus used for a Swedish sounding survey. This device comprises a handle 13, a penetrating tool 2 for excavating the ground, a screw point 19, a loading clamp 14, a weight 18, and a bottom plate 15, and a handle 13 extending horizontally to the left and right at the upper end of the penetrating tool 2. With the loading clamp 14 fixed at the middle and the screw point 19 attached at the lower end, the penetrating device is erected perpendicularly to the ground, and be careful not to bend and penetrate. The weight 18 is gently placed on the loading clamp 14 while performing a penetration test while applying no force in the vertical direction by human power other than the rotational torque given by the handle 13.

The extension rod 20 constituting the penetrating device 2
In addition, the penetrating member such as the screw point 19 and the ground sampling tube according to the present invention is made of a magnetic metal such as iron, and has a male-female connection portion 3 at both ends thereof for connecting the extension rod 20 for each predetermined length. Is formed. The female part of the connecting part 3 is, for example, in the case of an extension rod 20 for extending the length of the penetrating tool 2, a cylindrical connection in which the inner diameter is slightly reduced toward one end face in the longitudinal direction. The male part is formed by projecting a connection shaft 22 having substantially the same shape as that fitted into the connection hole 21 from the other end face. When the extension rods 20 are fitted to each other, or the screw points 19 or the ground sample collection cylinder according to the present invention are fitted to the peripheral wall 23 and the connection shaft 22 of the connection hole 21 forming the female part and the male part. Through holes 24 and 25 facing each other when
The through holes 24 and 25 are provided in such a manner that they pass through the cores of the connecting portions 3 and are orthogonal to their longitudinal directions.
Are determined uniformly for the peripheral wall 23 and the connecting shaft 22 of the connecting hole 21 constituting each connecting portion 3.

[0008] Lock pins 26 for preventing separation are inserted into through holes 24 and 25 in each connecting portion 3. By the presence of the lock pin 26, the penetrating members connected to each other are fixed in the rotational direction and the vertical direction. The penetrating member is made of a magnetic metal as described above, while the lock pin 26 is made of a so-called permanent magnet having magnetism. Then, the peripheral wall 23 of the connection hole 21 is inserted to load the lock pin 26.
And the through holes 24 and 25 provided in the connecting shaft 22 are set slightly larger than the diameter of the lock pin 26.

Thus, the connecting operation of the penetrating member is extremely easy, such as fitting the male and female connecting portions, aligning the respective through holes 24, 25 and inserting the lock pin 26, and furthermore, the lock pin 26 After being inserted, it is not easily deviated by vibrations or the like generated by the operation due to the action of the magnetic force, and a stable connection state can be maintained. Further, after the work is completed, the lock pin 26 is inserted through the through holes 24, 2 using a thin rod or the like.
The penetrating member can be easily separated by the operation of pushing out from the lock 5, and the removed lock pin 26 is originally magnetic, so that it can be attached to the handle 13 or the loading clamp 14 of the Swedish sounding machine. It is less likely to be lost.

Further, as described above, the connection hole 21 and the connection shaft 22 are provided.
Is set to a substantially equal tapered shape, so that even if the connecting shaft 22 is slightly loose with respect to the connecting hole 21, the male part and the female part in the connecting part 3 of each penetrating member in the excavation process are formed. Since the joining surfaces are constantly in close contact with each other, the run-out at the connecting portion 3 can be reduced. In the above embodiment, the connection hole 21, the connection shaft 22, and the lock pin 26
Although it was formed into a column shape in consideration of ease of loading and unloading and manufacturing cost, a predetermined function can be achieved even when formed into a prism shape.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a ground sampling tube according to the present invention. FIGS. 1 and 2 show a first embodiment of a ground sampling tube according to the present invention. This forms a connecting portion 3 at the bottom of the sampling tube main body 1 having a bottomed cylindrical shape having an inner space 27 having a constant cross-sectional shape in the longitudinal direction, for attaching to the tip of the penetrating device 2. A groove 5 is provided on the inner edge of the tip of the sampling port 4 which is opened in a circular shape over the entire circumference of the sampling cylinder main body 1 and along the front edge, and a synthetic resin lid 6 for sealing the sampling port 4 is provided. The edge is elastically hooked. That is, the diameter of the lid 6 is set to be smaller than the inner diameter of the sampling cylinder at the groove 5 and larger than the inner diameter of the other parts, and the periphery of the lid 6 is fitted into the groove 5 to collect the sampling cylinder main body 1. The mouth 4 is sealed to prevent intrusion of soil and the like into the inner space 27 of the sampling cylinder main body 1 up to a predetermined depth. In this case, since the maximum diameter of the lid 6 is larger than the diameter of the inner space 27, the posture of the lid 6 is difficult to stabilize even if pressure is applied when the sample enters, so that the lid 6 is It is desirable to form the cylinder having an appropriate thickness as shown in FIG. 2 so as to easily slide along the inner wall of the cylinder.

FIGS. 3 and 4 show a second embodiment of the ground sampling tube according to the present invention. In this method, a connecting portion 3 for attaching to the tip of the penetrating device 2 is formed at the bottom of the sampling tube main body 1 having a bottomed cylindrical shape. Two hooks 9, 9 comprising a pair of holding pieces 8, 8, which are arranged opposite to each other and project in the direction of the center of the sampling port 4, are arranged symmetrically with respect to the center of the sampling port 4. Between the pair of holding pieces 8, 8, the sampling port 4.
A notch 11 having a shape substantially equal to that of the holding piece 8 is provided at an edge of the lid 10 in the same positional relationship as each of the hooks 9, 9. 10, a stop plate 1 is provided along the edge of the notch 11 on the side in the reverse direction.
2, 12 are erected.

If the outer surface of the sampling cylinder main body 1 is formed into a screw shape as shown in FIG. 7 based on the above embodiment, the hole previously provided by the screw pointer 19 can be suitably adjusted to a predetermined depth by rotating the penetrating member 2. If the propulsion wing 16 shown in FIG. 8 is fixed with a sunk screw 17 or the like, it can be propelled to a deep portion by forward rotation, and can be made to float by reversing, so that immediately after the construction of the soil cement column, Convenient for sampling across layers.

At the bottom of the inner space 27 in each of the above-described embodiments, a push-out hole 28 for inserting a rod or the like when taking out a sample penetrates the connecting portion 3 of each penetrating member. The extrusion hole 28 is provided along the rotation axis of the tool 2 and communicates with the through holes 24 and 25. In addition, as for the connecting part 3, in addition to the above-described structure, it is only necessary to select a known means that does not cause the connecting part to be separated even if the penetrating tool is reversed. Either of them may be formed.

[0015] Originally, the Swedish sounding machine was
As described above, the rotation of the penetrating device 2 and the self-subsidence due to the load of the weight 18, that is, the length of the excavation, is observed, and the degree of hardness and softness of the ground is determined by using the rotation speed of the penetrating device 2 with respect to the excavating length. At the time of sampling, after the investigation with the screw point 19 to the predetermined depth is completed, the ground sample sampling cylinder according to the present invention is mounted on the tip of the penetrating tool 2 instead of the screw point 19 which is always attached when excavating the ground. After attaching the extension rod 20, the extension rod 20 is again extended to reach the sampling tube to the previously investigated depth, the rotation of the penetrating device 2 is stopped, and then the top of the penetrating device is hit with a hammer or the like, and the length of the sample is measured. The sample is settled and stored in the inner space 27 of the sampling cylinder.

When the sampling cylinder of the first embodiment is used, the lid 6 is resiliently disengaged from the groove 5 and is pushed into the uppermost part of the inner space 27 by the penetration of the sample by impact. on the other hand,
When the sampling cylinder of the second embodiment is used, it is necessary to reversely rotate the penetrating device 2 by at least about 180 degrees before hitting. That is, the sampling cylinder is screw point 19
When reaching the deepest part of the investigation hole, the stop plate 12 erected on the lid 10 of the sampling cylinder comes into contact with the bottom of the investigation hole and plays the role of a stopper, but further reverse rotation force is applied. While the lid 10 remains stationary, only the sampling cylinder main body 1 rotates, and finally the latching piece 8 of the sampling cylinder main body 1 abuts on the stop plate 12 at a position facing the notch 11 of the lid 10. The main body 1 and the lid 10 rotate together. In such a state, the catch between the sampling cylinder main body 1 and the lid 10 is completely released, and when a blow is applied, the lid 10 is pushed into the uppermost part of the inner space 27 as in the first embodiment. The sample is stored in the inner space 27 of the sampling cylinder. Thus, the lid 10 of the second embodiment is
Since there is no need for elasticity, the choice of materials is wider than in the first embodiment.

When taking out a sample from the sampling cylinder main body 1,
As described above, the rod is extruded through a rod or the like into the removal hole. However, as in the case of the sampling tube according to the present invention, the lid is pushed into the inner space together with the specimens, so that the lid covers the entire upper surface of the specimen. Even if a thin rod is used for extrusion in order to cover the inner space 27 without impairing the shape of the sample at the time of sampling.
Can be taken from Also, as described above, the extrusion hole 28
And the through holes 24 and 25 communicate with each other, so that when the sample is introduced into the inner space 27, it functions as an air hole, enabling a suitable introduction of the sample and, for example, extruding as shown in FIG. A step 30 having a reduced inner diameter is provided in the extrusion hole 28 by, for example, uniformly bulging an edge of the hole 28 near the inner space 27, and a portion having a large inner diameter with the step in the extrusion hole as a boundary. A ball 29 serving as a valve for sealing off the extrusion hole 28
When the ball 29 is loaded into the storage portion 31 and attached to the penetrating device 2, the portion functions as a check valve, and when the sampling tube is pulled up, the sample is empty. Even if it is likely to fall out of the portion 27, the bottom space of the inner space 27 becomes negative pressure, and the once collected sample is prevented from spilling out of the inner space 27 of the sampling tube main body 1. Along with this, there may be a case where a hole 32 for releasing water or air flowing into the inner space 27 is provided. As a material of the ball 29, an elastic material made of a synthetic resin is preferable, but a predetermined function can be achieved even by a material having no elasticity such as a metal.

[0018]

As described above, when the soil sampling tube according to the present invention is used, since it has a small diameter and a cylindrical shape having the same diameter as the penetrating device, it has been opened in advance in the Swedish sounding survey. It can be inserted to the specified depth along the hole, and the sample can be collected without letting the lid protrude out of the range of the outer diameter of the penetrating tool. Without coming, the sample can be easily collected by hitting the top of the penetrating device. In particular,
In the ground sampling tube according to claim 2, since the lid is securely held as long as it rotates forward, the lid of the sampling tube does not come off at a depth other than the specified depth, and the reliability of the collected sample is maintained. Can also be secured.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of a ground sampling tube according to the present invention.

FIG. 2 is a sectional view of a main part showing a first embodiment of a ground sampling tube according to the present invention.

FIG. 3 (a) (b) is a front view showing a second embodiment of the ground sampling tube according to the present invention.

FIG. 4 is a sectional view showing a main part of a second embodiment of a ground sampling tube according to the present invention.

FIG. 5 is a front view showing an example of a Swedish sounding machine.

FIG. 6 is a sectional view showing an example of a ground sampling tube according to the present invention.

FIG. 7 is a front view showing an example of a ground sampling tube according to the present invention.

FIG. 8 is a main part front view showing an example of a ground sampling tube according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sampling cylinder main body 2 Penetration tool 3 Connecting part 4 Sampling port 5 Groove 6 Lid 7 Sampling port 8 Nipping piece 9 Hook part 10 Lid 11 Notch part 12 Stop plate

Claims (2)

(57) [Claims] 1. A connecting portion (3) for attaching to the tip of a penetrating device (2) at the bottom of a sampling tube main body (1) having a bottomed cylindrical shape.
A groove (5) is provided at the inner edge of the tip of the sampling port (4) of the sampling cylinder main body (1), and the groove (5) has a lid (6) for sealing the sampling port (4). A ground data collection cylinder characterized by being elastically hooked on an edge. 2. A connecting portion (3) for attaching to the tip of a penetrating device (2) at the bottom of a sampling tube main body (1) having a bottomed cylindrical shape.
A plurality of hooks (9) formed of a pair of front and rear clamping pieces (8, 8) are formed around the inner edge of the tip of the sampling cylinder body (1) as the sampling port (7). On average over
A lid (10) for closing the sampling port (7) is mounted between each pair of holding pieces (8, 8).
A notch (11) having substantially the same shape as the holding piece (8) is provided at the edge of (0) in the same positional relationship as each of the hooks (9), and each notch (11) is provided on the lid (10). A ground sampling tube characterized in that a stop plate (12) is provided upright along an edge on the reversal direction side of (1).