JPS5998920A - Automatic penetration tester - Google Patents

Abstract

PURPOSE:To simplify survey the bearing force of the ground against a small building by a method in which a rod is penetrated into the ground by means of a driver connected to a wire by releasing the wire at a given interval of period, and the penetration degree of the rod is automatically reduced. CONSTITUTION:When a driver 5 is operated, a cam 4 is operated, a wire 3 wound around a winding drum 2 is released, a hammer 20 is dropped, and a rod 1 is penetrated into the ground by the rod 1. The wire 3 is wound around the drum 2 and the hammer 20 is again pulled up. When the rod 1 is penetrated, a wheel 6 is turned, the rotation is transmitted to a winding and feeding shaft 14 by a universal joint 11, and a recording paper 12 is sent out and recorded by a writing tool 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic penetration testing machine that easily investigates the soil bearing capacity of a building when installing a foundation, for example, in residential construction work.

During housing construction work, the bearing capacity of the soil at the construction site is investigated when installing the foundation in order to ensure that the house can be safely constructed and maintained.

In this survey, we learn the hardness and softness of the soil and the degree of compaction, and then set the foundation.

Conventionally, the dynamic conical Takajin (hereinafter referred to as the 1-ken type) test has been used as a method for investigating soil properties. This method uses a penetrating rod that is manually operated to penetrate into the ground, and investigates the soil quality based on the degree of penetration.Only one rod with a length of 1 m is used in this Joken type testing machine. Therefore, it is not possible to investigate deeper than 1 meter.

However, as a material for determining the soil bearing capacity of buildings, it is necessary to go a little deeper, for example, from 2m to about 10m from the ground surface.
Research materials up to around J are required.

In addition, it is not possible to say that a sufficient soil bearing capacity has been investigated unless we examine not only one location but several types of cones at several locations and comprehensively investigate the hardness and softness of the soil, the degree of compaction, and the presence or absence of rocks.

Therefore, it is not sufficient to investigate the soil bearing capacity of buildings using the conventional single test type testing machine.

In addition, since this Joken-type testing machine is operated by humans, there is a problem with accuracy, and the required number of personnel must be secured, resulting in risks, fatigue, etc.

The present invention has been made in view of the above-mentioned circumstances, and aims to provide an automatic penetration testing machine that focuses on soil bearing capacity measurement for foundation design of small-scale buildings such as houses. It is.

That is, the automatic penetration testing machine of the present invention includes: a drive device that winds up a wire and opens it at regular intervals; a driving device connected to the wire; a rod that is penetrated into the ground by the driving device 6; Contact this rod°
C. An automatic recording device for recording the number of personnel for the rods arranged therein.

Hereinafter, details of the present invention will be explained with reference to the drawings showing one embodiment thereof.

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is an enlarged perspective view of the inside of a storage box, Fig. 3 is a perspective view of an automatic recording device, and Fig. 4 is a front view showing an example of a cone. It is a diagram.

In the figure, reference numeral 1 denotes a rod that is driven into the ground, and this rod 1 is equipped with a wire winding drum 2 and a drive equipped with a cam 4 that opens the wire 3 wound on the wire winding drum 2 at regular intervals. Device 5 'r'' is driven into the ground.The rod 1 is driven into the ground (through the foil 6 placed in contact with the rod 1, the size of the rod 1 is recorded by the automatic recording device 8. 7 is the tip of the rod. I will explain how it is loaded into the ground and driven into the ground.

The cam 4 of the drive device 5 is driven by a power mechanism 9 such as a motor via a chain 10 to operate a driving device connected to the wire r-3 and penetrate the 1-1 dot 1.

The automatic recording table @8 is composed of a universal joint 11 that abuts the lower end of the rod 1 in the penetrating direction and transmits the rotation of the foil 6 installed at C, a recording paper 12 operated by the universal joint 11, and a writing instrument 13. This self-E joint 11 rotates the winding frame feed @ 14 to operate a writing instrument 13, such as a ballpoint pen, and also rotates the drum 15 on which the recording paper 12 of the recording device is wound, and records the degree of penetration on the recording paper 12. do.

For recording, for example, a line drawing gear 16 can be attached to the cam 4 so that measurements can be made in five increments.

Next, the driving device is composed of a column 17, a guide rod 19, a hammer 20, and a knocking head 21. In the figure, a storage box 22 encloses a drive device 5 and an automatic recording device 8.
A column 17 is erected on the side, and a tow rope 24 is stretched on the side to fix the column 17. A pair of upper and lower guide arms 25 and 26 are fixedly attached to this support column 17 so as to extend outward. A cone 7 is loaded at the tip of the lower guide arm 25, and the rod 1 is vertically inserted and held therein, and a guide rod 19 having a knocking head 21 fixed at its lower end is inserted and held in the upper guide arm 26. A knocking head 21 is mounted above the rod 1. A hammer 20 that is movable up and down is mounted on the knocking head 21 of the guide rod 19. A guide roll 27 is fixed to the upper part of the column 17, and a wire 3 connected to the hammer 20 at one end and the wire winding drum 2 at the other end is suspended through the guide roll 27.

Next, near the penetration part of the rod 1, a boil 6 connected to the universal joint 11 is brought into contact with a guide roll 28 so as to sandwich the rod 1 therebetween.

That is, this foil 6 is constructed by sandwiching the rod 1 between a support plate 29 together with a guide roll 28, and suspending this from a foil stand 31 with a chain 30. In this way, when the foil 6 penetrates the rod 1, the impact is directly recorded by the recording device 8.
It is held by a foil stand 31 so that it will not be hit by the camera.

Reference numeral 32 denotes a limit stopper, which is disposed in contact with the foil 6. When the knocking head 21 is lowered by the vertical movement of the hammer 20, and the knocking head 21 comes into contact with the detection rod 33 of the limit stopper 32, the shellfish loading 45 is stopped.
Outputs an electric signal to the drive section of rod 1 to stop the drive, and rod 1
Add a new one and continue the penetration.

Reference numeral 34 is a level for the storage box 22, 35 is a counter, 3
6 is an outlet connected to a power source, and 37 is a remote control switch.

Next, the shape of the cone 7 will be explained with reference to FIG.

The cone 7 is attached to the tip of the rod 1 and inserted into the ground, and has two types of shapes: one is a conical shape (A) with a tip angle of 60° and an outer diameter of 3.0G11; The other has a tip angle of 30' and an outer diameter of 3.0C.
There are two types: B-shaped cones with an acute conical shape.

Next, the driving rod 1 that holds the cone 7 has an outer diameter of 25 m.
The scale is engraved on a 1-meter iron bar, and can be added and disassembled in 1-meter increments.

Also, the hammer 20 that moves the guide rod 19 up and down has a heavy fi8.91. g nomo (7) te upper guide l15i! 2
There is something that falls about 50 cm between the six toe-knocking heads 21.

Next, a method of investigation using the automatic penetration testing machine of the present invention will be explained.

Installing the automatic penetration testing machine of the present invention on the land to be measured,
That is, the support 17 is erected, the tiger rope 24 is stretched, and the support 17 is
and fix the storage box 22. The investigation method is to press the button on the remote control switch 37 from a distance and press the drive device 5 in the storage box.
When power is input to the cam 4, the cam 4 is activated, and the wire A7-3 is released, the 8.9 kg hammer 20 is allowed to fall freely from a height of 50 cm, and the rod with a diameter of 19 is penetrated into the ground. The number of strikes is set at 30 per minute.

The striking method is to wind up the hammer 20 using the cam 4 and the wire winding drum 2, let it fall freely, strike the C knocking head 2, and repeat this operation.

Next, the nobility (cone tip resistance value) of the rod 1 is automatically recorded on the recording paper 12 by the automatic recording device 8. In this recording method, the driving rod 1 penetrates and rotates the foil 6, and the rotation is transmitted to the winding frame feed shaft 14 by the universal joint 1'1, so that the recording paper 12 is accurately rotated by the length of the rod 1. It is sent with a strict length of /4. At that time, it will be recorded with lead markings. The number of hits 1-1 is displayed by a counter. Following the above operations, the recorded data can be analyzed using J: and the NS value used to determine the C1 soil bearing capacity can be measured.

The NS value is obtained as a result as shown in FIG.

Note that the NS value is calculated using the following formula.

NS value = (100/penetration amount) x number of blows. The results are the same <N S (in the J-0 diagram shown in FIG. 5, the symbol A indicates an A-type cone and B indicates a B-type cone).

The nature of the land layer can be accurately determined based on the difference in the size of the two cones, A-type cone and B-type cone.

As explained above, since the penetration testing machine of the present invention conducts the investigation automatically, unlike manual testing machines, it does not require long periods of time due to personnel shifts and breaks, and it is possible to check the soil properties during the investigation. There is no change in accuracy due to changes in

Further, the present invention has the following effects.

(1) Since the J-tip is opened at regular intervals in the driving device, the rod penetrates at a constant speed with constant impact energy, and an ideal penetration resistance value with high accuracy of the pharyngeal C1 can be obtained.

(2)] - The tip resistance value is continuously recorded on the recording paper via the foil.

The depth of the fusion and supporting mausoleum can be clearly determined.

(4) Measurement time can be shortened and labor can be saved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention, Fig. 2 is an enlarged perspective view of a storage box, Fig. 3 is a perspective view of an automatic recording device, and Fig. 4 is a perspective view showing an embodiment of the present invention.
The figure is a front view of the unit, and FIG. 5 is a graph showing the measurement results. 1...Rod 2...Wire winding drum 3...
...Wire 4...Cam 5...Drive device 6...Wheel 7...・Cone 8...Automatic recording device 9...Motor 10...Chain 17...Pole 19 ......Guide Rondo 20...Hammer-21...Knocking Head 22...
・・・・・・Storage box 23・・・・・・Tiger set number is included with metal fittings 4.
・・・・・・River to rope 25.26・・・Guide arm 27・・・・・・Guide roll Application Person Sekisui Chemical Co., Ltd. Figure 1 Figure O Figure 3 Figure 4v4

Claims (6)

[Claims] (1) A driving device for winding a wire and opening it at regular intervals, a driving device connected to the wire, a rod penetrated into the ground by the driving device, and a rod placed in contact with the rod. An automatic penetration tester comprising: an automatic recording device for recording the length of the installed rod. (2) The self-portrait tester according to claim 1, wherein the drive device is composed of a wire winding drum and a cam D1. (3) The automatic penetration testing machine according to any one of claims 1 to 2, wherein the driving device is composed of a support, a kite rod, a hammer, and a knocking head. (4) Claims 1 to 4, characterized in that the rod has a cone with a slightly thick diameter at its tip.
The automatic nobleman testing machine described in any one of paragraph 3. (5) Claims 1 to 3, characterized in that the cone diameter is comprised of two types of cones with different tip angles.
The automatic penetration test described in any one of paragraphs 4. (6) The self-introduction testing machine according to any one of claims 1 to 5, characterized in that the recording device is arranged on a foil that comes into contact with the rod.