JP2008139140A - Simple dynamic cone penetration testing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple dynamic cone penetration testing machine advantageous from a view to eliminate an irregularity in measuring result while reducing the load of a worker. <P>SOLUTION: The simple dynamic cone penetration testing machine 10 is constituted of a frame 12, a guide rod 16, a cone 18, a knocking block 20, a drive hammer 22, a drive hammer moving means 24, a locking and unlocking means 26, a moving quantity detector 44 and a hammering number-of-time detector 46. The drive hammer moving means 24 supports the drive hammer 22 ready to lift and fall. The moving quantity detector 44 detects the moving quantity in the longitudinal direction of the guide rod 16 with respect to the frame 12, that is, detects the penetration quantity of the cone 18 pushed in the ground to output a detection signal. The hammering number-of-time detector 46 detects the hammering number of times of the drive hammer 22 to the knocking block 20 to output a detection signal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a simple dynamic cone penetration test apparatus.

Various types of penetration tests have been proposed for measuring ground strength, and one such penetration test is a simple dynamic cone penetration test.
In the simple dynamic cone penetration test, a drive hammer with a mass of 5 kg is dropped freely from a height of 50 cm, a cone with an outer diameter of 25 mm and a tip angle of 60 degrees is driven into the ground, and the number of hits Nd for every penetration length of 10 cm is measured. It is.
A test apparatus for performing such a simple dynamic cone penetration test is provided (see Patent Document 1).
JP 2001-342620 A

However, in the above-mentioned conventional apparatus, since the operator must measure the penetration length and the number of hits, if the number of measurement points increases, the burden on the operator increases and the work becomes difficult.
Further, for example, measurement in a place where there is a possibility of a secondary disaster such as a place where a natural disaster has occurred is not preferable for safety.
In addition, the measurement by human power has a disadvantage that individual differences are likely to occur in the test results.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a simple dynamic cone penetration test apparatus that is advantageous in reducing variations in measurement results while reducing the burden on the operator. .

  In order to achieve the above-mentioned object, a simple dynamic cone penetration test apparatus according to the present invention is attached to a frame extending vertically, a guide rod supported by the frame so as to be movable up and down, and a lower end of the guide rod. Cone, a knocking block provided in the middle in the longitudinal direction of the guide rod, a drive hammer slidably coupled to the portion of the guide rod above the knocking block, and the drive hammer can be raised and lowered And a drive hammer moving means that supports the drop so as to be able to fall, a movement amount detector that detects a movement amount of the guide rod in the longitudinal direction with respect to the frame and outputs a detection signal, and an impact of the drive hammer on the knocking block And an impact number detector for detecting the number of times and outputting a detection signal.

  According to the present invention, since the movement amount of the guide rod is detected by the movement amount detector, and the number of times of driving the hammer is detected by the number of hits detector, a simple dynamic cone penetration test can be performed unattended and measured. This is advantageous not only in eliminating variation in results, but also in reducing the burden on the operator.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view showing a state in which the simple dynamic cone penetration test apparatus 10 according to the present embodiment is mounted on the base machine 2, and FIG. 2 is a front view showing the configuration of the simple dynamic cone penetration test apparatus 10.

As shown in FIGS. 1 and 2, the simple dynamic cone penetration test apparatus 10 is mounted on a base machine 2 such as a heavy machine that can be remotely operated, or an arm 2B of the base machine 2 via a dedicated attachment 2A. Used by attaching to.
As shown in FIG. 2, the simple dynamic cone penetration test apparatus 10 includes a frame 12, a guide rod 16, a cone 18, a knocking block 20, a drive hammer 22, a drive hammer moving means 24, and an engaging / disengaging means. 26, rod holder 28, hook means 40, guide means 42, movement amount detector 44, impact number detector 46, rod extension means 48, and the like.

The frame 12 is provided so as to extend in the vertical direction, and the frame 12 includes two lifting guide shafts 14 extending in parallel in the vertical direction.
An upper plate 1202 is provided at the upper end of the frame 12, and a lower plate 1204 is provided at the lower end of the frame 12. The upper end of each lifting guide shaft 14 is attached to the upper plate 1202, and the lower end is attached to the lower plate 1204. It is worn.

The guide rod 16 extends vertically and has a circular shape with a uniform cross-sectional shape, and is supported by the frame 12 via an elevator 34, which will be described later.
The cone 18 is attached to the lower end of the guide rod 16, has a conical shape facing downward, and has an outer diameter of 25 mm and a tip angle of 60 degrees.

The knocking block 20 is provided integrally with the guide rod 16 in the middle portion in the longitudinal direction of the guide rod 16. The knocking block 20 is formed with a larger cross section than the guide rod 16.
The drive hammer 22 is slidably coupled to the portion of the guide rod 16 above the knocking block 20.
The drive hammer 22 has a mass of 5 kg, and when the drive hammer 22 freely falls from above and collides with the knocking block 20, a force in a direction in which they penetrate into the ground is applied to the guide rod 16 and the cone 18. .

The drive hammer moving means 24 supports the drive hammer 22 so that it can be raised and lowered and dropped.
In the present embodiment, the drive hammer moving means 24 includes an elevator 34, an elevating drive means 36, and an engagement / disengagement means 38.
The elevator 34 has a rectangular plate shape, and is slidably coupled to the two lifting guide shafts 14 via bearing portions provided on both sides thereof.

The elevating drive means 36 elevates and lowers the elevator 34 along the elevating guide shaft 14.
More specifically, the elevating drive means 36 includes an elevator motor 3602, a first gear 3604 supported by or attached to the frame 12, a second gear 3606 supported by the frame 12, and the like. And a chain 3608 wound around the gears 3604 and 3606.
A part of the chain 3608 is attached to the elevator 34.
Accordingly, when the elevator motor 3602 is rotated forward and backward, the chain 3608 is moved between the first and second gears 3604 and 3606, whereby the elevator 34 is moved up and down.

The engagement / disengagement means 38 is provided in the elevator 34 and supports the drive hammer 22 so that it can be engaged / disengaged.
More specifically, the engagement / disengagement means 38 includes an engagement / disengagement motor 3802, a male screw member 3804, and two engagement / disengagement pieces 3806.
The drive shaft of the engagement / disengagement motor 3802 is connected to the male screw member 3804 via a gear mechanism.
The male screw member 3804 has a right-hand thread on the half in the longitudinal direction and a left-hand thread on the remaining half in the longitudinal direction.
The male screw member 3804 extends in the horizontal direction, is rotatably supported by the elevator 34, and is rotated forward and backward by an engagement / disengagement motor 3802.
The two engaging / disengaging pieces 3806 are screwed into the right screw and the left screw of the male screw member 3804 and are non-rotatably supported by the elevator 34. Therefore, by the forward / reverse rotation of the male screw member 3804, the two engaging / disengaging pieces 3806 are Move in the direction of approaching and separating from each other.
The two engagement / disengagement pieces 3806 are movable between an engagement position where the two engagement pieces 3806 approach each other and engage with the bottom surface of the drive hammer 22 and a retreat position which is separated from the bottom surface of the drive hammer 22 and allows the drive hammer 22 to fall. It is configured.
Therefore, when the elevator 34 rises in a state where each engaging / disengaging piece 3806 is located at the engagement position and engaged with the drive hammer 22, the drive hammer 22 is lifted together with the elevator 24.
When each engagement / disengagement piece 3806 moves from the engagement position to the retracted position, the engagement between the drive hammer 22 and the engagement / disengagement piece 3806 is released, and the drive hammer 22 falls due to its own weight.
In the present embodiment, the engagement / disengagement means 38 has been described as a configuration including the engagement / disengagement motor 3802, the male screw member 3804, and the two engagement / disengagement pieces 3806. Such engagement / disengagement means is conventionally known. Various configurations can be adopted.

The rod holder 28 is disposed at 16 guide rods 16 below the knocking block 20 and closer to the knocking block 20.
The rod holder 28 is attached to the guide rod 16 so as not to move. Therefore, the rod holder 28 moves up and down integrally with the guide rod 16.
The rod holder 28 has a rectangular plate shape and is slidably coupled to the two lifting guide shafts 14 via bearing portions provided on both sides thereof.

The hook means 40 connects the elevator 34 and the rod holder 28 so as to be detachable.
More specifically, the hook means 40 includes a hook motor 4002, a rotating rod 4004, and an engagement hole 4006.
The hook motor 4002 is provided on the rod holder 28.
The rotating rod 4004 is coupled to a hook motor 4002, and a rectangular locking piece protrudes radially outward from the rotating rod 4004 at the tip of the rotating rod 4004.
The engagement hole 4006 is provided in the rod holder 28.
The engagement hole 4006 is provided in the upper wall of the rod holder 28 and allows the rotation rod 4004 and the locking piece to be inserted therethrough. The engagement hole 4006 is provided below the opening and allows the rotation rod 4004 and the locking piece to rotate. It is composed of a storage space. The opening has a circular portion through which the rotating rod 4004 is inserted, and a rectangular portion that communicates with the circular portion and through which the locking piece is inserted.
That is, the locking piece passes through the rectangular portion and is positioned in the housing space, and the rotating rod 4004 is rotated by a predetermined angle, so that the locking piece is engaged with the surface of the upper wall facing the housing space. The elevator 34 and the rod holder 28 are engaged. Further, when the rotating rod 4004 is rotated in the reverse direction by a predetermined angle, the locking piece is positioned at the rectangular portion of the opening, whereby the locking piece can move upward through the rectangular portion. Thus, the engagement between the elevator 34 and the rod holder 28 is released.
Therefore, when the elevator 34 moves up and down while the elevator 34 is engaged with the rod holder 28 by the hook means 40, the rod holder 28 moves up and down together with the elevator 24, and an intermediate rod 50 described later is added.
In the present embodiment, the hook unit 40 has been described as including a hook motor 4002, a rotating rod 4004, and an engagement hole 4006. However, as the hook unit, various conventionally known configurations can be used. Can be adopted.

The guide means 42 is disposed below the frame 12 and supports the guide rod 16 so as to be slidable in the longitudinal direction of the frame 12 and immovable in a direction perpendicular to the longitudinal direction of the frame 12.
For example, the guide means 42 is supported by the lower plate 1204 and includes, for example, a plurality of rollers 4202 that are in contact with the guide rod 16.

The movement amount detector 44 detects the movement amount of the guide rod 16 in the longitudinal direction with respect to the frame 12, that is, the penetration amount by which the cone 18 is pushed into the ground, and outputs a detection signal.
In the present embodiment, the movement amount detector 44 includes a roller supported by the upper plate 1202, a wire wound around the roller and having an end connected to the rod holder 28 (guide rod 16), And a detector for detecting the amount of rotation.
That is, the movement amount detector 44 is composed of a wire encoder that detects the movement amount of the guide rod 16 as a wire feeding amount.
The movement amount detector 44 is not limited to a wire encoder, and may be any device that can detect the movement amount of the guide rod 16 with respect to the frame 12, such as a magnetic or photoelectric linear encoder, An optical displacement sensor that irradiates and reflects a laser beam on a measurement object and receives the reflected light by a light receiving sensor and measures the amount of movement (displacement) of the measurement object may be used. In this case, it is advantageous to detect the movement amount of the guide rod 16 with respect to the frame 12 more reliably and less costly and to reduce the cost.

The hit count detector 46 detects the hit count of the drive hammer 22 against the knocking block 20 and outputs a detection signal.
In the present embodiment, the hit number detector 46 is constituted by a position detection sensor that detects the movement of the engagement / disengagement piece 3806 of the engagement / disengagement means 38 from the engagement position to the release position.
The hit number detector 46 is not limited to the position detection sensor, and may be any one that can detect the hit number of the drive hammer 22 against the knocking block 20 and output a detection signal. Various conventionally known detection mechanisms such as a sensor for detecting an impact generated when 22 collides with the knocking block 20 can be used.

The rod extension means 48 is for adding the intermediate rod 50 between the lower end of the first guide rod 16A and the upper end of the second guide rod 16B.
In other words, the rod extension means 48 is for adding the intermediate rod 50 to a position above the cone 18 below the rod holder 28 of the guide rod 16 so that the entire length of the guide rod 16 can be extended.
That is, in the present embodiment, the guide rod 16 has a first guide rod 16A provided with the knocking block 20 and attached to the rod holder 28, and an upper end connected to the lower end of the first guide rod 16A. 2 includes a second guide rod 16B provided with a cone 18. Reference numeral 1602 in FIG. 2 indicates a joint between the first guide rod 16A and the second guide rod 16B.
Specifically, a male screw is formed on one of the first guide rod 16A and the second guide rod 16B, and a female screw is formed on the other, and the first guide rod 16A is engaged by screwing the male screw and the female screw. And the second guide rod 16B are detachably connected. Further, both ends of the intermediate rod 50 to be added are formed with the male screw, and a female screw and a male screw that are screwed to the female screw. In response, more than one will be added.
In the present embodiment, the rod extension means 48 includes a rod stocker 52 and a rod stocker moving means (not shown).
The rod stocker 52 holds a plurality of intermediate rods 50.
The rod stocker moving means is for moving the rod stocker 52 in a direction in which the rod stocker 52 contacts and separates from the guide rod 16, and includes, for example, a pneumatic cylinder or a hydraulic cylinder spanned between the rod stocker 52 and the frame 12. It consists of

FIG. 3 is a block diagram showing a configuration of a measurement system 100 using the simple dynamic cone penetration test apparatus 10.
The measurement system 100 includes an input interface board 102 and a measurement personal computer 104 in which the input interface board 102 is incorporated, in addition to the simple dynamic cone penetration test apparatus 10.
The input interface board 102 converts the detection signal indicating the movement amount supplied from the movement amount detector 44 into the penetration amount data D1 and supplies it to the personal computer 104. The input interface board 102 determines the number of hits supplied from the hit number detector 46. The detection signal shown is converted into data D2 of the number of hits and supplied to the personal computer 104.
Signal lines for transmitting signals between the input interface board 102 and the movement amount detector 44 and between the input interface board 102 and the hit number detector 46 are, for example, wired, wireless, wired, and It is a combination of radio.
The personal computer 104 generates measurement data 106 by processing the penetration data D1 and the hit count data D2 supplied from the input interface board 102 with predetermined data processing software, and the measurement data 106 is displayed in a tabular format. Or displayed in a graph format or printed out using a printer.

Next, the operation of the simple dynamic cone penetration test apparatus 10 will be described.
4 is a flowchart of a test operation by the simple dynamic cone penetration test apparatus 10, FIGS. 5A to 5G are operation explanatory views by the simple dynamic cone penetration test apparatus 10, and FIGS. 6A to 6H are FIG. It is operation | movement explanatory drawing in the case of performing the rod extension by the simple dynamic cone penetration test apparatus 10. FIG.
The base machine 2 (FIG. 1) is provided with an electric power supply source that supplies electric power to the elevator motor 3602, the engagement / disengagement motor 3802, and the hook motor 4002, and the base machine 2 can be operated remotely. The electric power is supplied to the motors 3602, 3802, 4002 from the electric power supply source.
The base machine 2 (FIG. 1) is provided with an air pressure supply source or an oil pressure supply source for supplying air pressure or oil pressure to the air cylinder or hydraulic cylinder of the rod stocker moving means. By operating, pneumatic pressure or hydraulic pressure is supplied from the pneumatic pressure supply source or hydraulic pressure supply source to the air cylinder or hydraulic cylinder of each rod stocker moving means.

This will be described with reference to FIGS.
First, the frame 12 of the simple dynamic cone penetration test apparatus 10 is attached to the arm 2B of the base machine 2 or the like via a dedicated attachment 2A.
Next, the cone 18 is attached to the lower end (tip) of the second guide rod 16B (step S10), and the first guide rod 16A is attached to the upper end of the second guide rod 16B (step S12).
The drive hammer 22 is attached to the first guide rod 16A (step S14).
Next, by remotely operating the base machine 2 (see FIG. 1) on which the simple dynamic cone penetration test apparatus 10 is mounted, as shown in FIGS. 5 (A) and 5 (B), it can be easily performed on the ground to be tested. The dynamic cone penetration test apparatus 10 and the base machine 2 are installed (step S16).
That is, the simple dynamic cone penetration test apparatus 10 is placed so that the frame 12 (guide rod 16) is orthogonal to the surface of the ground.
At this time, it is determined whether or not the tip of the cone 18 sinks due to the weight of the guide rod 16 and the drive hammer 22 (step S18).
When subsidence occurs due to its own weight, the amount of subsidence when the penetration of the cone 18 and the guide rod 16 stops is measured (step S20), and the process proceeds to step S22.
When the settling due to its own weight does not occur, the driver hammer 22 is hit against the guide rod 16 and the hit count Nd value for every 10 cm of penetration length is measured (step S22).
That is, by remotely operating the base machine 2, the drive hammer 22 is engaged with the elevator 34 by the engagement / disengagement means 38, and then the elevator 34 and the drive hammer 22 are raised 50 cm (FIG. 5C).

Next, by remotely operating the base machine 2, the drive hammer 22 is dropped by the engagement / disengagement means 22 and the knocking block 20 is hit (FIG. 5D).
Thereafter, the drive hammer 22 is repeatedly raised and dropped in the same procedure as described above (FIGS. 5E, 5F, and 5G).
It is determined whether or not the penetration amount has reached the end criterion (step S24). The termination criterion is when 10 or more hits are required to reach a penetration of 2 cm.
If the penetration amount reaches the end criterion, the test is ended (step S34).
If the penetration amount does not reach the end criterion, it is determined whether or not the penetration amount is 1 m or more (step S26).
If the penetration amount is not 1 m or more, the process returns to step S22.
If the penetration amount is 1 m or more, the intermediate rod 50 is added.
That is, by remotely operating the base machine 2, as shown in FIGS. 6A and 6B, the drive hammer 22 is engaged with the elevator 34 by the engagement / disengagement means 38 and the elevator 24 is engaged by the hook means 40. The rod holder 28 is engaged, and the drive hammer 22 and the guide rod 16 (first guide rod 16A) are lifted together with the elevator 34 (steps S28 and S30).
Accordingly, as shown in FIG. 6C, a space sufficient to insert the intermediate rod 50 is formed between the lower end of the first guide rod 16A and the upper end of the second guide rod 16B.
Then, by remotely operating the base machine 2, as shown in FIG. 6D, the stocker moving means causes the rod stocker 48 to approach the guide rod 16 from a position away from the guide rod 16.
Next, as shown in FIG. 6E, the operator adds the intermediate rod 50 taken out from the rod stocker 48 between the lower end of the first guide rod 16A and the upper end of the second guide rod 16B (step S32), returning to the operation of step S12.
Then, by remotely operating the base machine 2, the rod stocker 48 is separated from the position approaching the guide rod 16 by the stocker moving means, as shown in FIG.

Next, by remotely operating the base machine 2, the engagement between the elevator 24 and the rod holder 28 is released by the hook means 40 while the drive hammer 22 is engaged with the elevator 34 by the engagement / disengagement means 38.
Then, as shown in FIG. 6 (G), the drive hammer 22 is lifted together with the elevator 34, and as shown in FIG. 6 (H), the drive hammer 22 is dropped by the engagement / disengagement means 22 and the knocking block 20 is hit. repeat.

Here, the remote operation of the simple dynamic cone penetration test apparatus 10 will be described.
FIG. 7 is a schematic configuration diagram of a system for remotely operating the simple dynamic cone penetration test apparatus 10.
In this system, a work vehicle equipped with the portable penetration test apparatus 10 is remotely controlled from a location remote from the base machine 2 (work vehicle).
In addition to the measurement personal computer 106, a communication unit 110, a control unit 112, a display 114, and a control unit 116 are provided at a place away from the work vehicle.
The work vehicle is provided with a communication unit 120, a control unit 122, a camera 124, a power supply source 126, an air pressure supply source (or hydraulic pressure supply source) 128, an interface 130, and a traveling unit 132. A simple dynamic cone penetration test apparatus 10 is attached.
The place away from the work vehicle may be a work office in a building, a mobile car, or a simple place. The personal computer 104 for measurement, the communication part 110, the control part 112, the display 114, the control unit 116, etc. should just be carried.

The communication unit 110 at a location away from the work vehicle is connected to the work vehicle communication unit 120 via a wireless line, and is detected by the transmission of a control command to the work vehicle, the movement amount detector 44 and the hit number detector 46. Communication such as reception of detected signals and reception of video signals photographed by the camera 124.
The control unit 112 gives the detection signal received via the communication unit 110 to the measurement personal computer 104 via the input interface board 102. In addition, by supplying the video signal received via the communication unit 110 to the display 114, a monitor image is displayed on the display 114.
The control unit 116 has operation members such as operation levers and operation switches, and according to operations performed on these operation members, remote control such as running and stopping of the work vehicle, and the simple dynamic cone penetration test apparatus 10. Control commands for performing remote control are generated, and these control commands are transmitted to the communication unit 120 of the work vehicle via the control unit 112 and the communication unit 110.
Here, the remote control of the simple dynamic cone penetration test apparatus 10 refers to power supply from the power supply source 128 to the elevator motor 3602, the engagement / disengagement motor 3802, and the hook motor 4002 shown in FIG. The supply or discharge of air pressure or hydraulic pressure from the pressure supply source (or hydraulic supply source) 128 to the air cylinder or hydraulic cylinder of each rod stocker moving means.

The communication unit 120 of the work vehicle gives the work command transmitted from the communication unit 110 at a location away from the work vehicle to the control unit 122, and the control unit 122, based on the control command, The operation of the pressure (hydraulic pressure) supply source 128 is controlled, and the operation of the traveling unit 132 for traveling and stopping the work vehicle is controlled based on the control command.
The camera 124 shoots the situation in the vicinity of the worker and the vicinity of the simple dynamic cone penetration test apparatus 10, generates a video signal, supplies the video signal to the control unit 122, and the control unit 122 transmits the video signal via the communication unit 120. To the communication unit 110 located away from the work vehicle.
Detection signals of the movement amount detector 44 and the hit number detector 46 are supplied to the control unit 122 via the interface 130, and the control unit 122 transmits the detection signal via the communication unit 120 to a communication unit at a place away from the work vehicle. 110.

According to such a configuration, the worker can run, stop, and stop the work vehicle via the wireless line by operating the control unit 116 while viewing the image displayed on the display 114 at a place away from the work vehicle. The simple dynamic cone penetration test apparatus 10 is installed by remotely controlling the operation of the arm, and the test operation by the simple dynamic cone penetration test apparatus 10 can be remotely controlled via a wireless line by operating the control unit 116. it can.
The measurement data 106 can be generated and output by the measurement personal computer 104 based on a detection signal transmitted to a place away from the work vehicle via a wireless line.

According to the present embodiment, since the movement amount of the guide rod 16 is detected by the movement amount detector 44 and the number of hits of the drive hammer 22 is detected by the hit number detector 46, measurement by a human becomes unnecessary. This is advantageous in eliminating variations in measurement results while reducing the burden on the user.
Further, except when the intermediate rod 50 is added to the guide rod 16, there is no need to place an operator at the place where the simple dynamic cone penetration test apparatus 10 is installed. This is advantageous in performing measurement at a place where there is a risk of such a situation.
Further, according to the present embodiment, since the rod holder 28 is provided, the raising and lowering of the guide rod 16 can be reliably guided in the vertical direction, which is advantageous in accurately performing the simple dynamic cone penetration test. In particular, in the present embodiment, the guide rod 16 is raised and lowered by the guide means 42 in the vertical direction, which is further advantageous in accurately performing the simple dynamic cone penetration test.
In addition, according to the present embodiment, the rod holder 28 and the hook means 40 can easily and reliably add the guide rod 16, so that even when the amount of penetration of the cone 18 becomes large, the simple dynamic cone penetration test can be accurately performed. Can be done.
Further, since the rod holder 28 for guiding the raising and lowering of the guide rod 16 is used as a mechanism for adding the guide rod 16, the number of parts of the simple dynamic cone penetration test apparatus 10 is reduced, and the size and cost are reduced. This is advantageous in achieving this.

As mentioned above, although embodiment of this invention was described, in this invention, since a ground can be measured unmanned using the simple dynamic cone penetration test apparatus 10, a simple dynamic cone penetration test apparatus is performed by the following methods. It can also be activated.
For example, a remote-controllable base machine equipped with a simple dynamic cone penetration test device is equipped with a GPS receiver that receives GPS radio waves from GPS satellites and generates positioning data, and the positioning data obtained by the GPS receiver is Similarly to the measurement data of the simple dynamic cone penetration test apparatus, it can be configured to receive at a place away from the site (base machine) using a wireless line.
In this case, since the position of the simple dynamic cone penetration test apparatus can be accurately obtained in real time based on the positioning data transmitted from the base machine side, it is advantageous in automatically controlling the movement of the base machine.
At this time, it is optional to receive and monitor image data of the ground to be measured taken by the remote control camera provided in the base machine at a place away from the base machine via a wireless line.
Moreover, the ground strength map of a measurement point can be created based on the measurement data and positioning data of the simple dynamic cone penetration test apparatus transmitted to the location away from the base machine.
Moreover, the measurement data and positioning data of the simple dynamic cone penetration test apparatus transmitted from the base machine to the remote location can be transmitted to the other system or server via the Internet for use.
It is also possible to attach a posture control device that sets the simple dynamic cone penetration test device vertically.

It is explanatory drawing which shows the state which mounted the simple dynamic cone penetration test apparatus 10 of this Embodiment in the base machine 2. FIG. It is a front view which shows the structure of the simple dynamic cone penetration test apparatus. It is a block diagram which shows the structure of the measurement system 100 using the simple dynamic cone penetration test apparatus. 4 is a flowchart of a test operation performed by the simple dynamic cone penetration test apparatus 10. (A) thru | or (G) are test operation | movement explanatory drawings by the simple dynamic cone penetration test apparatus 10. FIG. (A) thru | or (H) is operation | movement explanatory drawing in the case of performing the rod extension by the simple dynamic cone penetration test apparatus 10. FIG. 1 is a schematic configuration diagram of a system for remotely operating a simple dynamic cone penetration test apparatus 10. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Simple dynamic cone penetration test apparatus, 12 ... Frame, 16 ... Guide rod, 18 ... Cone, 20 ... Knocking block, 22 ... Drive hammer, 24 ... Drive hammer moving means, 44 ... Movement amount detector, 46 ... Number of hits detector.

Claims (7)

A frame extending up and down;
A guide rod supported by the frame so as to be movable up and down;
A cone attached to the lower end of the guide rod;
A knocking block provided in an intermediate portion in the longitudinal direction of the guide rod;
A drive hammer slidably coupled to the portion of the guide rod above the knocking block;
A drive hammer moving means for supporting the drive hammer so that it can be raised and lowered;
A movement amount detector that detects a movement amount of the guide rod in the longitudinal direction relative to the frame and outputs a detection signal;
A hit number detector for detecting the hit number of the drive hammer to the knocking block and outputting a detection signal;
A simple dynamic cone penetration test apparatus characterized by comprising: The frame includes two lifting guide shafts extending in parallel in the vertical direction,
The drive hammer moving means includes
An elevator slidably coupled to the two lifting guide shafts;
Elevating drive means for elevating and lowering the elevator along the elevating guide shaft;
Engaging / disengaging means provided in the elevator and removably supporting the drive hammer;
The simple dynamic cone penetration test apparatus according to claim 1. The frame includes two lifting guide shafts extending in parallel in the vertical direction,
A rod holder is provided at the guide rod portion below the knocking block so as to move up and down integrally with the guide rod,
The rod holder is slidably coupled to the two lifting guide shafts.
The simple dynamic cone penetration test apparatus according to claim 1. Hook means for releasably connecting the elevator and the rod holder;
The simple dynamic cone penetration test apparatus according to claim 3. The portion of the guide rod below the rod holder and above the cone is configured to be able to be added so that the entire length of the guide rod can be extended.
The simple dynamic cone penetration test apparatus according to claim 3. Guide means connected below the frame and supporting the guide rod so as to be slidable in the longitudinal direction of the frame and immovable in a direction perpendicular to the longitudinal direction of the frame,
The simple dynamic cone penetration test apparatus according to claim 1. The frame is held by an arm of a work vehicle that can be remotely operated,
The work vehicle is remotely controlled at a location remote from the work vehicle;
The operation of the drive hammer moving means is remotely operated together with the work vehicle at a location away from the work vehicle,
The detection signal of the movement amount detector and the detection signal of the hit number detector are received at a place away from the work vehicle via a wireless line.
2. The portable cone penetration test apparatus according to claim 1, wherein:

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