JP2000282774A - Sampler thrusting apparatus and soil sample sampling apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To thrust a sampler by a required length sequentially and at a unified speed, and to efficiently and excellently obtain undisturbed soil samples. SOLUTION: A sampling apparatus comprises a sampler thrusting apparatus 1, a drilling apparatus 32, a mounting base 16, and a hydraulic cylinder. The sampler thrusting apparatus 1 has a rod locking chuck for holding a rod 22 of a sampler for sampling soil samples, and a stroke cylinder having one end thereof linked to the rod locking chuck and other end thereof fixed onto the ground, for thrusting a sampling tube by a required length from a hole base. The drilling apparatus 32 drills the ground by means of a rotary tool. The mounting base 16 slidably holds the drilling apparatus 32 such that the position of the rotary tool of the drilling apparatus 32 frontward and rearward moves with respect to a drilling set position. The hydraulic cylinder allows the sampler thrusting apparatus 1 to be mounted on the mounting base 16, has a positioning stopper 19 for the a stand base plate 2 on the mounting base, and slides the drilling apparatus 32 on the mounting base 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sampler pushing-in device for collecting a soil sample without disturbing it according to a recommended collection procedure, and to pierce a soil sample of a predetermined depth to the position for performing the sampling. The present invention relates to a soil sample sampling device that includes a perforation device and the sampler pushing device, and efficiently performs operations from a perforation operation to an undisturbed soil sample collection operation.

[0002]

2. Description of the Related Art A fixed-piston thin-wall sampler is often used for collecting a viscous soil sample that is not disturbed for a soil test. When collecting this cohesive soil sample, first, a hole is drilled up to a predetermined position by a drilling device, and then a sampler is inserted into the hole of the hole, and the tip of the sample is landed on the bottom of the hole. In this case, only the sampling tube is pushed in, the sample is pushed in to a predetermined depth, and then the sample is taken up. However, at this time, it is difficult to obtain a soil sample that is not as disturbed as in the soft ground, especially if the pushing of the sampling tube is poor. Therefore, according to the special specifications of the Ministry of Transport, when sampling undisturbed soil samples, the indentation length of the sampler should be 8
0 cm and the sampler is 8
It is required to push 0cm. Conventionally, as a method of pushing the sampler, a hydraulic method using a borehole pump, or a wire locked to the sampler is wrapped around a cone pulley provided with a punching device or the like, and the sampler is pushed in with the tightening condition of the wire. There are a cone pulley type, a chain block type in which a manual chain block is used instead of the cone pulley, and a system in which the sampler is pushed in by lowering the spindle holding the rod using the stroke of the spindle of the punching device.

[0003]

However, in this conventional method or structure for pushing a sampler,
There were the following disadvantages. That is, in the hydraulic type, there are many pulsations due to the pump action, and it is difficult to adjust the press-fitting such as the constant pressing speed of the sampler, and it is difficult to obtain a good soil sample without disturbing. In the cone pulley type, the speed and pressure are affected by the tightening condition of the wire, and it is difficult to maintain a constant speed and pressure of the sampler. In this case as well, it is difficult to obtain a soil sample that does not disturb well. In the chain block type, since the chain is also wound up by manual operation and the sampler is pushed in, it is difficult to maintain a constant speed and pressure of the sampler, and in this case, a soil sample that does not disturb is obtained well. It is difficult. Further, in the method in which the sampler is pushed in using the stroke of the spindle of the punching device, the stroke of the spindle is 500 mm.
After moving the entire stroke, the spindle must be returned to the starting point again and then the remaining 300 mm must be pushed in. Can not be obtained.

[0004] The present invention has been made to solve such a conventional problem.
The sampler can be continuously pushed in at the required length at a uniform speed, and after pushing in, the same procedure can be used to pull out the sampler at a constant speed and a constant pressure. It is an object of the present invention to provide a sampler pushing device which can be obtained. Another object of the present invention is to provide a soil sample sampling apparatus capable of efficiently performing drilling at a predetermined position and sampling for obtaining a soil sample that does not disturb satisfactorily.

[0005]

According to another aspect of the present invention, there is provided a sampler pushing device according to the first aspect of the present invention, wherein a rod is connected to an upper end of a sampling tube, and a rod is disposed inside the lower end of the sampling tube. A sampler consisting of a piston which is slidably inserted into the rod and an intermediate piston rod which is slidably inserted into the rod and slidably supports the piston at a fixed position on the ground side, is provided at the bottom of a pre-drilled boring hole. In a sampler pushing device in which the sampling tube is inserted so that the lower end of the sampling tube comes into contact with the sample tube and then only the sampling tube is pushed downward from the bottom of the hole via the rod to collect a soil sample, A rod-stopping chuck that is detachably gripped at a predetermined position; Linked other end characterized by comprising a cylinder, a having a length of at least depressible stroke collection of defining the sampling tube is fixed to the ground side from the hole bottom.

[0006] In the sampler pushing device according to the second aspect, in the sampler pushing device according to the first aspect,
The cylinders are arranged opposite to each other at a predetermined distance on a stand base plate for vertically suspending the cylinder with respect to the ground, and oil passages of the cylinders are integrally communicated with a hydraulic pressure source. It has a notch for inserting the rod between them.

According to a third aspect of the present invention, there is provided the sampler pushing device according to the first or second aspect, wherein the sampler pushing device is mounted on a rod which is mounted on the rod stopper chuck or the rod. An indicator needle pointing to a linear scale.

According to a fourth aspect of the present invention, there is provided a soil sample sampling device, wherein the drilling device is installed near a drilling setting position and drills through the ground with a rotary tool, and the rotary tool position of the drilling device advances and retreats with respect to the drilling setting position. A mounting table for slidably holding the punching device, and the sampler pushing device according to any one of claims 1 to 3, wherein the punching device after the punching is retracted. And a positioning means for setting the stand base plate on the mounting table so as to match the pushing position of the sampler pushing device with the punching position of the punching device.

According to a fifth aspect of the present invention, in the soil sample sampling apparatus according to the fourth aspect, the drilling device has a hydraulic pressure source, and the sampler pushing device has an oil passage connected to the hydraulic pressure source. It is characterized in that it is formed so as to be freely connectable and that the sampling tube is pushed in by operating the hydraulic pressure source.

According to a sixth aspect of the present invention, there is provided the soil sample sampling apparatus according to the fourth or fifth aspect, wherein the driving means for sliding the perforation device on a mounting table is mounted on the mounting device. It is characterized in that it is connected to a table.

[0011]

Next, embodiments of the present invention will be described in detail with reference to the drawings. 1A and 1B show a sampler pushing device according to an embodiment of the present invention, wherein FIG. 1A is a front view, FIG. 1B is a side view of the same, and FIG. 1C is a plan view showing a stand base plate portion. FIGS. 2A and 2B are explanatory diagrams showing a use state of the sampler pushing device. FIG. 2A shows a state in which the sampling tube is placed on the bottom of the hole, and FIG. 2B shows a pushed state. In FIG. 2, reference numeral 20 denotes a conventional sampler, 21 denotes a thin-wall type sampling tube, 22 denotes a rod erected on the upper end thereof, 23 denotes a piston that slides inside the sampling tube 21, and 24 denotes a piston. An intermediate piston rod 25 connected to the piston 23 and slidably extended to the ground through the rod 22 and the intermediate piston rod 25.
Reference numeral 4 denotes an intermediate piston rod fixing coupling for integrally locking the rod with the rod 22. The intermediate piston rod 24 is connected to a winding device (not shown) via a turnbuckle 26 and a chain 27.

A sampler pushing device 1 according to the present embodiment.
Is a stand base plate 2, a pushing hydraulic cylinder 3,
The main structure is a rod stopper chuck 4, a linear scale 5, and an indicator needle 6. The stand base plate 2 is for stably mounting the sampler pushing device 1 and is formed in a substantially rectangular shape, and its long side is substantially the same as the short side width of the mounting table 16 of the punching device 32 described later. A notch 10 which is formed to have dimensions and is provided at the center position of the long side, into which the rod 22 is inserted. Then, the push-in hydraulic cylinders 3,
3 are erected with a predetermined gap therebetween. The supply or discharge ports are integrally connected to each other by pipes 3c and 3d so that the hydraulic cylinders for pushing 3 and 3 are linked to each other. The working length of the hydraulic cylinder 3 for pushing in the present embodiment is such that a pushing amount H of 80 cm specified in the special instructions of the Ministry of Transport can be sufficiently obtained.
The thing of 0cm is used. In the drawing, reference numeral 11 denotes a double cylinder fixing member connecting the upper portions of the cylinders, and reference numeral 12 denotes a double intermediate piston rod connecting member fixing the intermediate piston rods 13, 13.

The rod stopper chuck 4 is provided with the rod 2
2 is removably fixed to transmit the expansion and contraction movement of the intermediate piston rod 13.
It is formed integrally with the continuous intermediate piston rod connecting member 12. This rod stopper chuck 4 has a through hole 14a through which the rod 22 is inserted, and a screw lock 14b which tightens and fixes the rod 22 inserted through the through hole 14a.

The straight scale 5 and the indicator needle 6 are used for visually and accurately measuring the amount of pushing (press-fitting) of the rod 22, that is, the amount of pushing of the sampling tube 21. It is fixed along the hydraulic cylinders 3 and 3 and a scale is provided every 5 cm.
The pointing needle 6 is fixed to an appropriate position of the rod 22 and is provided so as to cover the straight scale 5 disposed on the left and right sides thereof.
And a screw lock 15b to be fixed to the rod 22 inserted through the through hole 15a.

Next, a description will be given of an apparatus for sampling a soil sample. FIGS. 3A and 3B are explanatory diagrams of an operation of sampling a soil sample using the sampler pushing device 1. FIG. 3A is an explanatory diagram in which a punching device is attached to a mounting table, and FIG. 4A and 4B are explanatory views showing a state where the sampling device is provided by being attached to the mounting table, FIG. 4 is an explanatory view showing the mounting table, FIG.

The mounting table 16 is a well-known drilling device 3.
2 and the sampler pushing device 1 of the present invention are arranged in cooperation with each other to constitute a soil sample sampling device A, which has a mounting surface 16a longer than the lower frame 35 of the perforator 32, Frame 35 and mounting table 1
The work switching hydraulic cylinder 17 that slides the lower frame 35 on the mounting table 16 is connected to the work table 6. The work switching hydraulic cylinder 17 moves the drilling device 32 forward to position the rotary tool 33 at the drilling setting position 34 for drilling, and after drilling, retracts the sampler pushing device 1 to the drilling setting position 34. The piercing device 32 is slidably held in order to dispose it.

In the drawing, reference numeral 18a denotes a perforation position lock portion of the perforation device 32, and 18b denotes a retreat position lock portion, each of which is a bolt mounting plate 18 suspended from a lower frame 35.
c and a fixing plate 18f which faces the bolt mounting plate 18c and allows the bolt 18e to be inserted into the transverse notch 18d at the drilling position or the retracted position. The bolt mounting plate 18c hung down from the lower frame 35 also functions as a guide when the punching device 32 advances and retreats. The bolt mounting plate 18c is detachably fixed to a side surface of the lower frame 35 with a bolt (not shown). When only the punching device is used, the bolt mounting plate 18c is detached so as not to be in the way, but is always set on the mounting table 16. If they are kept, they may be fixed by welding.

Reference numeral 19 denotes a positioning stopper of the sampler pushing device 1. The stand base plate 2 of the sampler device is placed on a vacant portion where the punching device 32 is retracted and held by the rod stopper chuck 4. Rod 22
When the vertical axis 22a is located at the same position as the perforation setting position 34, the stand base plate 2 is fixed at a position where the end of the stand base plate 2 is disposed in contact. In the figure, 28 is a boring hole,
29 is the bottom of the hole, 30 is a protective pipe for the borehole, 3
Reference numeral 1 denotes a portion of the ground into which the soil sample is pushed. The push-in hydraulic cylinder 3 and the work switching hydraulic cylinder 17 of the sampler push-in device 1 use the hydraulic pump provided in the drilling device 32 as a hydraulic pressure source. Therefore, the piping 3a of the pushing hydraulic cylinder is
Is provided so as to be detachably connected via the coupler 3b.

Next, the operation of the present embodiment will be described. First, as shown in FIG. 3A, the drilling device 32 is installed near the drilling set position 34 together with the mounting table 16, and the rotary tool 33 is arranged so that the axis of the rotary tool 33 coincides with the drilling set position 34. . At this time, the lower frame 35 of the perforation device 32 is configured such that the bolt mounting plate 18c is
8a, and is in a state of being bolted to the fixing plate 18f. It should be noted that illustrations of a tower, a pulley device, and the like necessary for the work are omitted. After piercing to a predetermined depth by the above-described device, lifting the rotating tool 33 and loosening the bolt 18e,
The perforation device 32 is retracted by operating the hydraulic section to operate the work switching hydraulic cylinder 17. At this time, the bolt 18e coincides with the fixing plate 18f of the retracted position lock portion 18b, and the bolt 18e is inserted into the transverse notch 18d.

After tightening the bolt 18e, FIG.
As shown in (b), the spindle 36 is horizontally turned,
The sampler pushing device 1 is arranged on the empty mounting table 16. In this case, the stand base plate 2 of the sampler pushing device 1 is placed on the placing surface 16a, and the end thereof is brought into contact with the positioning stopper 19, so that the rod stopper chuck 4 of the sampler pushing device 1 holds the sample. The vertical axis 22 a of the rod thus set automatically coincides with the drilling set position 34. Finally, the mounting table 16 described above
And the stand base plate 2 are fixed to each other with clamps (stand stand fixing brackets) 7, and the sampling work is started immediately by connecting the piping 3 a from the hydraulic device of the drilling device 32 to the hydraulic cylinders 3, 3 for pushing. Can be.

The sampling operation is performed from the state where the tip of the sampler 20 has landed on the hole bottom 29. First, after the piston rods 13 of the pushing hydraulic cylinder are raised, the rod 22 is fixed by the rod stopper chuck 4. Thereafter, by loosening the intermediate piston rod fixing coupling 25 and lowering the pushing hydraulic cylinder 3 by operating the hydraulic device, the rod 22 is moved toward the hole bottom and the sampling tube 21 is moved downward from the hole bottom 29. The sample can be collected by pushing it in. At this time, the rod 22
When the pointer 6 is moved downward, the indicator needle 6 is lowered. By visually observing the moving distance, the set sampling length H can be accurately secured. In this case, 80c
m can be continuously pushed at a constant speed without stopping halfway. Thereafter, by performing a substantially reverse operation to the above, the sample can be withdrawn at a constant speed and a constant pressure as described above.
Can be obtained in length.

As described above, the sampler pushing device 1 and the soil sample sampling device A according to the present embodiment have the following advantages. 1. Pressing (press-fitting) without stopping halfway with hydraulic pressure enables pushing while maintaining a constant speed for the set length, and adjusting the pressure level while sensing the strength of the ground is possible with the hydraulic device of the drilling device. Become. Therefore, it has become possible to collect a material having an N value of about 4 to 7 times, which has been difficult in the past.
2. The indentation state (static penetration amount) is made to penetrate up to 80 cm while observing the scale mark. This scale, penetration pressure,
By sensing the penetration speed with a gauge of a hydraulic device or the like, it is possible to estimate a change state of the stratum. 3. When the pushing (penetration amount: 80 cm) is completed, the intermediate piston rod fixing coupling 25 is fixed, then the handle 14b is tightened to fix the rod 22 to the rod chuck, and the sampler 20 is slowly raised. At this time, the sampling tube (thin wall tube) 21 is conventionally pulled and twisted, which is a major cause of the turbulence. Disturbance can be reduced at the time of pulling out, and a very good soil sample without disturbance can be obtained. 4. Conventionally, there is a case where the load is applied to the ground before the work by setting the sampler 20 to the bottom of the hole, and when the depth becomes large, the weight of the rod 22 is added to the weight of the sampler 20 and the weight of the rod 22 becomes very large. What caused this, in this embodiment, since the pushing stroke is 120 cm, which is an extra length than the sampling length, use the margin to adjust in mm units to the position immediately before the sampling depth. In addition, it is possible to set the sample without pressurizing the ground, and it is possible to collect a sample with little disturbance. 5. Accurate attachment / detachment of the sampler pushing device 1 to / from the mounting table 16 can be performed extremely easily. Therefore, the work can be performed very efficiently.

The embodiments of the present invention have been described above. However, the specific configuration of the present invention is not limited to the embodiments, and there may be design changes within the scope of the present invention. This is also included in the present invention. For example, in the present embodiment, the hydraulic cylinder 17 moves the drilling device 32 forward and backward. However, the present invention is not limited to this, and a screw shaft or a rack device may be used. Further, the shapes of the rod stopper chuck 4 and the stand base plate 2 are arbitrary. Further, although the fixing of the stand base plate 2 to the mounting table 16 is performed by a clamp, it can be set arbitrarily such as a bolted type or a lever locked type. Although the pushing hydraulic cylinder is fixed to the mounting table via the stand base plate, a bracket may be directly protruded from the punching device, and the pushing hydraulic cylinder may be attached to this bracket.

[0024]

As described above, the first aspect of the present invention is as follows.
In the sampler pushing device described above, since the above configuration is adopted, the tip of the sampler can be accurately set at the bottom of the hole without applying weight or the like to the sampling site before sampling, and the pushing operation can be performed. The sampling tube can be pushed in at a constant speed and pressure at a fixed length without stopping midway, and after being pushed in, the drawing tube is pulled out at the same speed and at the same pressure. As a result, it is possible to easily obtain a good soil sample that is not disturbed as much as possible.

According to the second aspect of the present invention, the sampler pushing device can be easily attached to the already installed rod, and can be pushed into the rod in a well-balanced manner to obtain accurate and efficient sampling. The effect that work can be performed is obtained.

In the sampler pushing device according to the third aspect of the present invention, since the above configuration is adopted, a stroke longer than the sampling length and a mechanism capable of measuring the pushing amount are used to adjust in mm units to a position immediately before the sampling depth. It can be set in a state where the ground is not pressurized, and an effect such that a sample with little disturbance to a large depth can be collected can be obtained.

According to the fourth aspect of the present invention, since the above configuration is adopted, the sampler pushing device can be easily arranged and positioned at the drilling position of the drilling device, and the subsequent sampling operation can be performed easily and accurately. Can do it. In addition, the tip of the sampler can be accurately set at the bottom of the hole without exerting its own weight on the sampling site before sampling, and the required length is constant without stopping during the pushing operation. Since the sampling tube can be pushed in at a stretch with a constant pressure, it is possible to easily obtain a soil sample with little disturbance.

According to the fifth and sixth aspects of the present invention, since the above construction is adopted, it is easy to assemble and disassemble, and work accurately and efficiently on site where various conditions such as scaffolding are poor. be able to. Further, by sharing the hydraulic pressure source, it is possible to simplify the operation of each operation, to reduce the size, to facilitate the handling, and to reduce the cost.

[Brief description of the drawings]

FIG. 1 shows a sampler pushing device according to an embodiment of the present invention, in which (a) is a front view, (b) is a side view of the same, and (c) is a plan view showing a stand base plate portion.

FIGS. 2A and 2B are explanatory diagrams showing a use state of the sampler pushing device according to the embodiment; FIG. 2A shows a state in which a sampling tube is placed on the bottom of a hole; FIG.

FIG. 3 is an explanatory diagram of an operation of sampling a soil sample using the sampler pushing device of one embodiment, wherein (a) is an explanatory diagram in which a perforation device is attached to a mounting table;
(B) is an explanatory view showing a state in which a sampler pushing device is attached to the mounting table and a sampling device is provided.

4A and 4B are explanatory diagrams illustrating a mounting table according to an embodiment, wherein FIG. 4A is an explanatory diagram illustrating a state of an upper surface, and FIG. 4B is an explanatory diagram illustrating a side surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sampler pushing-in apparatus 2 Stand base plate 3 Hydraulic cylinder for pushing 3a Hydraulic piping of a hydraulic cylinder for pushing 4 Rod stop chuck 5 Straight length 6 Indicator needle 7 Clamp (Stand base fixing bracket) 10 Notch of stand base plate 16 Work table 17 Work Switching hydraulic cylinder 19 Positioning stopper 20 Sampler 21 Sampling tube 22 Rod 22a Vertical axis of rod 32 Drilling device 33 Rotary tool 34 Drilling setting position

Claims (6)

[Claims] 1. A sampling tube having a rod connected to an upper end thereof, a piston disposed inside the lower end of the sampling tube, and a piston slidably inserted into the rod and sliding or fixing the piston by a ground operation. A sampler consisting of an intermediate piston rod supported so as to be inserted into the hole bottom of a pre-drilled boring hole so that the lower end of the sampling tube comes into contact with the sampler. A pusher for a sampler configured to collect a soil sample by pushing downward from above, comprising: a rod-stopping chuck that grips the rod removably at a predetermined position on the ground, one end of which is connected to the rod-stopping chuck, and the other end of which is grounded. The sampling tube fixed to the side at least a specified sampling length from the bottom of the hole. Sampler pushing device, characterized in that it comprises a cylinder, a having to included possible stroke. 2. The cylinder is disposed on a stand base plate for vertically suspending the cylinder with respect to the ground with a predetermined distance therebetween, and oil passages of the cylinders are integrally communicated with a hydraulic pressure source. The sampler pushing device according to claim 1, wherein the base plate has a notch for inserting the rod between the cylinders. 3. The apparatus according to claim 1, further comprising: a straight scale erected along the cylinder, and an indicating needle attached to the rod stopper chuck or the rod and pointing to the linear scale. The sampler pushing device according to claim 1 or 2. 4. A drilling device installed near a drilling setting position and drilling in the ground by a rotary tool, and the drilling device is slidably movable such that the rotary tool position of the drilling device advances and retreats with respect to the drilling setting position. And a sampler pushing device according to any one of claims 1 to 3, wherein the stand base plate is placed on a mounting table in which the perforation device after the perforation is retracted. An apparatus for sampling a soil sample, comprising: positioning means for setting the punching position of the sampler pressing device to be equal to the punching position of the drilling device. 5. The apparatus according to claim 1, wherein the drilling device has a hydraulic source, and the sampler pushing device is formed so that an oil path can be connected to the hydraulic source, and pushes the sampling tube by operating the hydraulic source. The soil sampler according to claim 4, wherein the soil sampler is provided. 6. The soil sample according to claim 4, wherein driving means for sliding the drilling device on a mounting table is connected between the drilling device and the mounting table. Sampling device.