JPS63822Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an automatic simple ground bearing capacity judgment that allows even those without civil engineering knowledge to accurately and quickly judge the vertical and horizontal supporting capacity of a columnar object, such as a telephone pole, by the ground with simple operations. It is related to vessels.

In order to rationally erect utility poles, it is necessary to judge the bearing capacity of the ground. For this reason, the following methods have been used conventionally. In other words, a "tower" is built at the judgment site, and a weight pulled up by a pulley and wire attached to the tower is dropped.The rod penetrates into the ground, and the number of strikes is determined until the rod reaches a predetermined penetration depth. , and calculate the vertical supporting force from these using a known calculation formula. Next, a horizontal tensile force is applied to the head of the penetrated rod, the inclination (displacement) of this and the rod with respect to the ground surface is determined, and from these, the horizontal supporting force is calculated using a known calculation formula. The required method has been adopted.

However, in this conventional method, the weight is manually lifted and dropped, and the operator of the weight counts the number of strikes until the specified penetration depth is reached. This not only requires a great deal of effort, but also makes it impossible to apply a certain level of penetration force due to operational errors such as miscounting the number of strikes or dropping the weight before it has been raised to the specified height. This has the disadvantage that measurements tend to be inaccurate. In addition, when calculating the vertical bearing capacity using these measurement results, all calculations using complicated calculation formulas are performed manually, which not only takes time to obtain results, but also leads to calculation errors. tends to occur. In addition, because the person in charge of calculations needs to have civil engineering knowledge, a total of three people are required to perform the measurements: one to operate the weight and one to read the penetration depth from the scale provided on the penetrating rod. Even if a person is also responsible for reading the penetration depth, at least two people are required.

In addition, when measuring the horizontal bearing force, not only is it necessary to apply a horizontal tensile force manually, which requires a great deal of labor, but it is also necessary to read the horizontal tensile force and the inclination of the rod with respect to the ground surface. , it is necessary to perform calculations using calculation formulas using these results. Therefore, conventional methods have disadvantages such as not only being extremely troublesome to measure, but also lacking in speed and having many errors.

This invention automatically adjusts the penetration depth and impact by simply setting up three legs and setting a rod-like body for penetration on this, connecting a wire to the weight or the rod-like body that has been penetrated, and turning on the power. We provide an automatic simple soil bearing capacity judger that detects the number of times and automatically calculates the bearing capacity using these results, making it easy and quick even for those without specialized knowledge. Moreover, it is possible to accurately determine the supporting force in the vertical direction and the horizontal direction. Next, the details will be explained using drawings.

FIG. 1 is an embodiment of the present invention, and FIG. 2 is a perspective view of the structure of a leg for supporting a penetrating rod.As shown in FIG. It consists of a measuring section C. In FIG. 1, reference numeral 1 denotes a utility pole simulator, which has a shape that is a miniature version of the buried root of a utility pole, so that measurements can be made close to the actual situation. 2 is a weight holder, 3 is a guide rod integrated with the weight holder 2, and the utility pole simulator 1 is connected to the weight holder 2 by screwing, for example, so as to be coaxial with the guide rod 3. It is made into a rod-shaped body so that it can be divided into two parts during transportation. (For example, the utility pole simulator 1 and the guide rod 3 may be further divided into multiple parts.) 4 is a weight, and the weight is selected to be around 5 kg, for example, for convenient transportation. The guide rod 3 is inserted into a support through hole provided at the center of the support rod 3, and is guided so as to be vertically movable. Reference numeral 5 denotes a support leg of a rod-like member having a tripod shape, and is formed from the various parts shown in FIG. 6 is a disc-shaped guide rod support plate, 6a is a guide rod insertion hole provided at its center, and 7 is a pulley. 8 ₁ , 8 ₂ , 8
Reference numeral ₃ denotes three legs of the same length, each of which is made so that it can be folded into two at the center shaft attachment part 8a, and each upper end of which has a shaft at a point that divides the outer circumference of the guide rod support plate 6 into three equal parts. Arrived 8b. Further, an inverted conical positioning body 8c is fixed to each lower end,
It is designed so that it can be inserted into the ground and fixed. 9 ₁ ,
9 ₂ and 9 ₃ are spacer members, each of which is made so that it can be folded in two at the center shaft attachment part 9a, and each of its opposite ends is connected to the leg members 8 ₁ , 8 ₂ , 8 at the lower part.
It is pivoted to ₃ . By bending each part as shown by the dotted lines in the figure, it is made so that it can be folded into a rod shape that can be loaded into a small car (for example, 100 cm), making it easy to transport. Form.

Next, B is a wire operation part, 10 is a motor, 11 is a clutch, 12 is a drum,
These are coupled coaxially. 13 is a wire, one end of which is connected to the upper part of the weight 4 or the upper end of the guide rod 3 of the penetration part A, and the other end is wound around the drum 12 via a pulley 7 so as not to slacken. Reference numeral 14 is a relay for supplying power to the motor, and reference numeral 15 is an operating switch thereof, which together form a circuit for starting and stopping the motor. 16 is a clutch power supply relay, 17 is a latch relay for clutch operation, 18 is an electromagnetic switch for operating the clutch,
Reference numeral 19 denotes a changeover switch for connecting/disconnecting and continuous operation of the clutch, and these constitute a clutch operating circuit.

Then, by turning on the operation switch 15, relay 1 is turned on.
4 is turned on and the motor 10 rotates. Furthermore, when the electromagnetic switch 18 is turned on with the changeover switch 19 set to the latch relay 17 side, the latch relay 17 operates and the wire 13 is connected to the drum 1.
2 to raise the weight 4. As will be described later, when the weight 4 comes into contact with the limit switch 20 fixed to the guide rod 3 and a signal _P1 is sent out, the latch relay 17 is turned off, releasing the clutch 11 and leaving the drum 12 in a free state. Drop the weight 4 and hit the weight receiver 2 to create the utility pole simulator 1.
penetrate into the ground. Here, the latch relay 17 is configured to be automatically turned on after a certain period of time has elapsed after being turned off by the signal _P1 from the limit switch 20. Therefore, the clutch 11 is connected again and the weight 4 is pulled up, and when the weight 4 contacts the limit switch 20, the weight 4 is dropped and penetrates the utility pole simulator 1. When the penetration depth is set in the maximum penetration depth setting circuit 29 (to be described later), the setting circuit 29
When the electromagnetic switch 18 is turned off by an off signal from the sensor, the connection of the clutch 11 is released and the penetrating operation required for one measurement is completed. Further, as will be described later, one end of the wire 13 is connected to a load cell 35 fixed to the head of the guide rod 3, and the intermittent and continuous operation changeover switch 19 is switched to directly operate the clutch power supply relay 16. ,
Clutch 11 is continuously connected and wire 13
A horizontal tensile force is applied to the guide rod 3 due to the winding. And maximum horizontal tensile force setting circuit 4, which will be described later.
The signal from 0, that is, the tensile force set here,
A signal sent out when the horizontal tensile force indicated by the load cell 35 is exceeded causes the electromagnetic switch 18 to be turned off, thereby ending the horizontal tensile operation required for one measurement.

Next, C is a measuring section, which consists of a vertical supporting force measuring section _C1 and a horizontal supporting force measuring section _C2 . In the vertical support force measuring section C ₁ , 20 is the above-mentioned weight position detector, such as a limit switch, which measures the length from the weight receiver 2 after the support legs 5 and the utility pole simulator 1 are set. For example, it is fixed to the guide rod 3 so that the length is 50 cm. Then, each time the drum 12 and the weight 4 pulled up by the wire 13 come into contact, one signal _P1 is sent out. In addition to the latch relay 17 for clutch operation as described above,
The weight 4 is repeatedly raised and dropped, and an integration counter 25 and a maximum number of penetration setting circuit 3, which will be described later, are installed.
0 as a counting pulse. 21 is wire 1
The winding length detector No. 3 uses a rotary encoder, for example, and measures the number of rotations of the drum 12 when the weight 4 is pulled up from the position of the weight receiver 2 to the position of the limit switch 20, that is, the number of rotations of the drum 12.
The length of the wire 13 to be wound up is sent as a pulse train signal _P2 of a given number with sufficient accuracy each time it is pulled up. 22 is an output holding circuit of the wire winding length detector, and for example, a reversible counter that can increase or decrease the number of counts is used. and pulse P ₂ from rotary encoder 21
13 wires each time the weight is lifted.
The winding length is maintained each time. Reference numeral 23 is a rotary encoder initial value setting circuit, for example, a counter, which starts counting from the state where the tip of the utility pole simulator 1 is placed on the ground surface, that is, before penetration, and when the limit switch 20 is activated, its signal P ₁ The counting is stopped and the output of the rotary encoder 21 in the first penetration operation, that is, the wire
The first winding length signal _P21 of No. 3 is held.
24 is a subtracting circuit which converts the output _P3 of the reversible counter 22 to the output of the initial value setting circuit 23.
Subtract P ₂₁ . The wire 1 gradually becomes longer as the position of the weight receiver 2 decreases with each penetration operation.
3 is determined, and an output P ₄ proportional to the penetration depth is sent out for each penetration operation. Reference numeral 25 is an integrating circuit, for example, a counter, which counts the output signal _P1 from the limit switch 20 to measure the number of times the utility pole simulator 1 is struck by the weight 4, that is, the number of penetrating operations. 2
6 is a specified penetration depth detector, for example, a counter, which counts the output _P4 of the subtraction circuit 24, and when it indicates a depth of, for example, 10 cm or 20 cm, i.e.
Every time the penetration depth increases to 10cm, output P ₅ is sent out,
In addition to the integration circuit 25 as a reset signal, 10cm
The integration circuit 25 outputs the number of penetrations P ₆ for each penetration. 27 is an averaging circuit which calculates the average value of the number of penetrations every 10 cm outputted from the integration circuit 25. 28 is a destructive readout memory circuit; 29 is a maximum penetration depth setting circuit, such as a preset counter;
This counter 29 counts the output pulses _P3 of the reversible counter 22, and when the number reaches the number indicating the maximum penetration depth set here, the off signal P of the electromagnetic switch 18 of the weight operating section B is turned off. ₈₁ , reset signals P _{82 and} P ₈₃ for the reversible counter 22 and the integration circuit 25, and a write signal P ₈₄ of the output P ₇ of the averaging circuit 27 to the memory circuit 28. Then, the clutch 11 is disconnected to stop the winding operation of the wire 13, and at the same time, the counts of the reversible counter 22 and the integrating circuit 25 are set to zero.
At the same time, the output of the averaging circuit 27 indicating the average number of hits per 10 cm is stored in the memory circuit 28, and one measuring operation is completed.

Next, 30 is a maximum number of penetration setting circuit, for example, a preset counter, and 31 is an alarm circuit.The preset counter 30 counts the output pulse _P1 of the limit switch 20, and when this exceeds the set maximum number of penetrations, an alarm A start signal is sent to the circuit 31 to generate an alarm. At the same time, the off signal P ₉₁ of the electromagnetic switch 18, the reset signal P ₉₂ of the wire winding length detector 22, and the integrating circuit 25,
Send P ₉₃ . Then, each part is returned to the state before the start of the penetration operation, the measurement operation is stopped, and the setting of the maximum number of penetrations is changed, thereby preventing inaccurate measurements due to an insufficient number of penetrations. 32 is a vertical support force calculator, 33 is a printer, and 34 is a start switch.The contents of the memory circuit 28 are read out by the read signal _P10 sent out when the switch 34 is turned on, and the calculator 32 reads out the data every 10 cm. The vertical support force is automatically calculated according to a known calculation formula using the average number of penetrations, etc., and the printer 33 prints out the calculation.

Next, in the horizontal direction supporting force measurement part _C2 , 3
Reference numeral 5 denotes a horizontal tensile force measuring device such as a load cell, which is fixed to the upper end of the guide rod 3 after the utility pole simulator 1 penetrates, that is, after measuring the vertical supporting force, and the wire 13 from the drum 12 is passed through the pulley 7. Connected.
Reference numeral 36 is a guide rod displacement measuring device, such as a dial gauge, which is fixed to the ground surface near the utility pole simulator 1 and measures the inclination (displacement) of the utility pole simulator 1 with respect to the ground surface when a horizontal tensile force is applied, by a number corresponding to this. Pulse P ₁₁
Send as. 37 is an analog-to-digital converter, which converts the analog output of the load cell 35 into a digital output _P12 . 38 is a dial gauge counter, and the output of the dial gauge 36
Count P ₁₁ . 39 is a destructive readout storage circuit, 40
is a maximum horizontal tensile force setting circuit, such as a preset counter, and a counter 40 counts the output _P12 of the analog-to-digital converter 37. When this exceeds the maximum horizontal tensile force set here, the OFF signal of the electromagnetic switch 18 of the weight operating section B is activated.
Send P ₁₃₁ to disconnect clutch 11,
Stop applying tension. Also, a write signal _P132 of the memory circuit 39 is sent out to cause the output of the counter 38 to be written. Reference numeral 41 denotes a horizontal support force calculator, and by switching the start switch 34,
The output of the storage circuit 39 read out by the readout signal _P10 is added, and the horizontal support force is automatically calculated using a known calculation formula. The printer 33 also prints out the results.

Since the present invention is configured as in the above embodiment, the penetration part A and the wire operation part B are set at the measurement site, and then the measurement part C is connected, and the maximum penetration depth setting circuit 29 and the maximum penetration depth are set. The penetration depth and number of penetrations are set in the number of times setting circuit 30. Afterwards, turn on the operation switch 15 and turn on the motor 10.
By activating and switching the changeover switch 19 to the intermittent side, penetration is automatically performed, and when the start switch 34 is turned on, a calculation operation is automatically performed and the vertical support force is printed.

In addition, the wire 13 is connected to the upper part of the guide rod 3 via the load cell 35, and after setting the tensile force in the maximum horizontal tensile force setting circuit 40, the operating switch 1
5 is turned on to start the motor 10, and the changeover switch 19 is switched to the continuous side, the tensile force is automatically applied. Further, when the start switch 34 is turned on, the horizontal supporting force is automatically calculated and the result is printed. Therefore, according to the present invention, even those without specialized knowledge can easily operate the system and quickly and accurately determine the bearing capacity of the soil.

Although the present invention has been explained above using utility poles as an example, it goes without saying that it can be applied to structures other than utility poles.

As is clear from the above explanation, the present invention has the excellent advantage that even those without specialized knowledge can easily and quickly determine the bearing capacity of the soil, and it is excellent for rationally erecting utility poles. It has the following effects.

[Brief explanation of the drawing]

FIG. 1 is an embodiment of the present invention, and FIG. 2 is a perspective view of the structure of a support leg of a penetrating rod. A... Penetration part, 1... Utility pole simulator, 2... Weight holder, 3... Guide rod, 4... Weight, 5... Support leg, 6... Guide rod support plate, 7 ...pulley, 8...
Leg body, 9... Spacing body, B... Wire operation section, 1
0... Motor, 11... Clutch, 12... Drum, 13... Wire, 14... Motor power supply relay, 15... Its operation switch, 16
...Clutch power supply relay, 17...Clutch operation relay, 18...Electromagnetic switch, 19...
...Intermittent and continuous operation selector switch, C...Measuring section,
C ₁ ... Vertical support force measurement section, C ₂ ... Horizontal support force measurement section, 20 ... Limit switch, 21
... Wire winding length detector, 22 ... Output holding circuit, 23 ... Initial value setting circuit, 24 ... Subtraction circuit, 25 ... Integration circuit, 26 ... Specified penetration depth detector, 27 ... Average circuit, 29... Maximum penetration depth setting circuit, 30... Maximum penetration number setting circuit, 32
...Calculator, 33...Printer, 34...Start switch, 35...Horizontal tensile force measuring device, 36...
... Utility pole simulator displacement measuring device, 40 ... Maximum horizontal tensile force setting circuit, 41 ... Arithmetic unit.

Claims (1)

[Scope of utility model registration request] A penetration part consisting of a small-diameter cylindrical penetration rod, a weight for driving the same, legs for supporting these, a motor, a clutch, and a drive unit driven by the clutch and connected to the weight or the penetration rod. a wire operating section comprising a drum for winding the wire; a clutch operating circuit for operating the clutch to wind the wire intermittently or continuously; driving the penetrating rod with a weight and pulling it in the horizontal direction; A detection circuit for detecting the number of penetrations and its output is used to detect the penetration depth when the penetration depth of the penetration rod reaches a predetermined driving depth and to stop the intermittent operation of the clutch operation circuit. a vertical support force measuring section consisting of a circuit that automatically calculates the support force in the vertical direction; and when the horizontal tensile force applied to the penetration rod reaches a preset horizontal tensile force, the clutch operation circuit Equipped with a horizontal tensile force measuring section that includes a horizontal tensile force detection circuit for stopping continuous operation, an inclination detection circuit for the penetrating rod, and an arithmetic circuit that automatically calculates the horizontal supporting force using the outputs thereof. A simple automatic soil bearing capacity tester.