JP2020109231A - Press-in system - Google Patents

Abstract

To provide a press-in system capable of more properly setting injection condition of liquid such as water.SOLUTION: A press-in system 1 is provided with: a press-in device 10 pressing-in a penetration member M into the ground; a hose drum device 20 winding off a hose 25 connected to a nozzle 25a attached on a lower end part of the penetration member M as the penetration member M proceeds; a liquid supplying device 3 supplying liquid through an intermediate hose 5 to the hose drum device 20; and a controller 14a controlling an amount of liquid supply which is a liquid amount of the liquid supplied to the nozzle 25a. The controller 14a controls the amount of the liquid supply so that press-in speed of the penetration member M becomes maximized within a range that a press-in force does not exceed a maximum press-in force, which is a maximum setting value of the press-in force based on the press-in force applied when the press-in device 10 performs press-in of the penetration member M.SELECTED DRAWING: Figure 1

Description

The present invention relates to a press fitting system.

BACKGROUND ART Conventionally, as shown in Patent Document 1 below, there is known a press-fitting system for press-fitting a pile while jetting water in the ground. According to such a press-fitting system, it is possible to reduce the press-fitting resistance of the pile by jetting water.

Japanese Patent Laid-Open No. 8-232263

In the conventional press-fitting system, there is room for improvement in appropriately setting the water injection conditions.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a press-fitting system that can more appropriately set the ejection conditions of fluid such as water.

In order to solve the above problems, the press-fitting system according to the first aspect of the present invention includes a press-fitting machine that press-fits a penetrating material into the ground, and a hose connected to a nozzle attached to the lower end of the penetrating material. A hose drum device that feeds out as the penetrating material advances, a fluid supply device that supplies fluid to the hose drum device via a relay hose, and a fluid supply amount that is the amount of fluid that is supplied to the nozzle are controlled. A control unit, wherein the control unit is based on a pressure input P when the press-fitting machine press-fits the penetrating material, and the pressure input P is within a maximum pressure input Pmax which is a set maximum value. The fluid supply amount is adjusted so that the press-fitting speed of the penetrating material is maximized.

According to the first aspect, since the fluid supply amount is adjusted so that the press-fitting speed of the penetrating material is maximized, the fluid is overloaded depending on the ground condition and the construction condition that change with the progress of the penetrating material. It is possible to increase the press-fitting speed as much as possible while supplying it without any shortage.
The fluid in the present invention includes water, various chemical solutions, air, and any combination thereof.

A press-fitting system according to a second aspect of the present invention includes a press-fitting machine for press-fitting a penetrating material into the ground, and a hose connected to a nozzle attached to a lower end portion of the penetrating material as the penetrating material progresses. A hose drum device that feeds the fluid, a fluid supply device that supplies fluid to the hose drum device via a relay hose, and a pressure, a flow velocity, and a flow rate of the fluid that is disposed downstream of the relay hose and that is supplied to the nozzle. A sensor that detects at least one of the above, and a control unit that refers to the detection result of the sensor and controls the fluid supply amount that is the amount of the fluid that is supplied to the nozzle. A press-in force generated when the machine press-inserts the penetrating material is used to estimate the penetration resistance force, and the fluid supply amount is adjusted based on the change in the penetration resistance force.

According to the second aspect, since the fluid supply amount is adjusted based on the change in the penetration resistance force, the fluid is supplied without excess or deficiency according to the ground condition and the construction condition that change with the progress of the penetration material. can do. Further, since the fluid supply amount is controlled by referring to the sensor provided downstream of the relay hose, it is possible to prevent the control response from being lowered even if the relay hose is long. Further, for example, when the sensor is provided in the fluid supply device on the upstream side of the relay hose, the influence of the pressure loss due to passing through the relay hose becomes large, and the condition of the fluid ejected from the nozzle is accurate. I can't grasp. On the other hand, since the sensor is arranged on the downstream side of the relay hose, the condition of the fluid ejected from the nozzle can be grasped more accurately, and the adjustment accuracy of the fluid supply amount is improved.

Further, the control unit increases the fluid supply amount when the penetration resistance force increases, decreases the fluid supply amount when the penetration resistance force decreases, and the penetration resistance force does not change. In some cases, the fluid supply amount may be maintained.

In this case, an appropriate fluid supply amount can be easily set by increasing or decreasing the fluid supply amount according to the increase or decrease in the penetration resistance force.

Further, the control unit, based on the comparison of the pressure input of the penetrating material, a reference pressure input preset according to at least one of the penetration depth of the penetrating material and ground conditions, the press-fitting speed of the penetrating material. You may adjust. Further, the control unit increases the press-fitting speed when the pressure input is substantially smaller than the reference pressure input, and increases the press-fitting speed when the pressure input is substantially larger than the reference pressure input. The press-fitting speed may be maintained when the pressure input and the reference pressure input are substantially the same.

In this case, it is possible to set an appropriate press-fitting speed according to the penetration depth of the penetrating material and the change of the ground, and it is possible to improve the construction efficiency.

According to the above aspect of the present invention, it is possible to provide a press-fitting system that can more appropriately set the ejection condition of a fluid such as water.

It is a schematic diagram of a press fit system concerning a 1st embodiment. It is an enlarged view of the hose drum apparatus of FIG. It is a figure of the hose drum apparatus which concerns on the modification of 1st Embodiment. It is a flow chart explaining the control method concerning a 2nd embodiment. It is a graph explaining reference pressure input.

(First embodiment)
Hereinafter, the press-fitting system of the first embodiment will be described with reference to the drawings.
As shown in FIG. 1, the press-fitting system 1 includes a press-fitting machine 10, a hose drum device 20, a power unit 2, a fluid supply device 3, and a tank 4. The press-fitting machine 10 is configured to press-fit the penetrating material M into the ground. Although the penetrating material M of the present embodiment is a steel sheet pile, other kinds of penetrating material M may be used. For example, the penetrating material M may be a steel pipe pile.

(Direction definition)
The press-fitting machine 10 is configured to arrange a plurality of penetrating materials M in a line and press-fit into the soil. Hereinafter, the direction in which the penetrating materials M are arranged is referred to as the front-back direction. Also, the direction orthogonal to the front-back direction when viewed from the top-bottom direction is referred to as the left-right direction.

The power unit 2 supplies power to the press-fitting machine 10. A crawler 2a is provided below the power unit 2, and when the press-fitting machine 10 moves forward, the crawler 2a follows the press-fitting machine 10 to move the power unit 2 forward. The power unit 2 and the press-fitting machine 10 are connected by an electric cable 2b and a power supply hose 2c. The power unit 2 supplies electric power to the press-fitting machine 10 via the electric cable 2b, and supplies hydraulic oil to the press-fitting machine 10 via the power supply hose 2c. Inside the power unit 2, a power source (engine etc.), a hydraulic oil tank, a hydraulic pump, etc. are accommodated.

The fluid supply device 3 supplies a high-pressure fluid to the hose drum device 20. Inside the fluid supply device 3, a power supply source (for example, a hydraulic motor, an engine, an electric motor, etc.) 3a and a pump 3b are housed. A water supply hose 3c is connected to the pump 3b. One end of the water supply hose 3c is arranged in the tank 4. The fluid supply device 3 and the hose drum device 20 are connected by a relay hose 5. When the power supply source 3a is driven and the pump 3b is operated, the fluid in the tank 4 is supplied to the relay hose 5 via the water supply hose 3c. The fluid supply device 3 and the press-fitting machine 10 are connected by a control cable 6.

A liquid such as water is stored in the tank 4. A hose 4a is connected to the tank 4, and a submersible pump 4b is attached to an end of the hose 4a. The submersible pump 4b is arranged at a water source such as the sea, lake or river. When the liquid in the tank 4 is reduced, the submersible pump 4b operates to supply water from the water source to the tank 4. In this embodiment, water is used as the "fluid" in the present invention, but this is an example. Not only water but also various chemicals, air, etc. can be used as fluids depending on the site environment or the like. Furthermore, a combination of these liquids or gases including water can be used as the fluid. Further, when the chemical liquid is used as the fluid, the chemical liquid may be prepared by mixing the chemical with the water obtained from the water source and stored in the tank 4, or the chemical liquid prepared separately may be stored in the tank 4. ..

(Press-fitting machine)
The press-fitting machine 10 includes a plurality of clamp portions 11, a saddle 12, a slide base 13, a press-fitting machine main body 14, a chuck 15, and a main cylinder 16.
Each of the plurality of clamp portions 11 grips the upper end portion of the reaction force pile R press-fitted into the ground in advance. The reaction force pile R may be a penetrating material that has been press-fitted in advance by the press-fitting machine 10 in a state where the press-fitting machine 10 is fixed to the reaction force base. Alternatively, a penetrating material previously buried by another construction machine or the like may be used as the reaction force pile R.

The saddle 12 is located above the plurality of clamp parts 11 and holds the clamp parts 11. The slide base 13 is provided so as to be slidable in the front-rear direction with respect to the saddle 12. The press-fitting machine main body 14 is provided on the slide base 13 so as to be rotatable left and right. The press-fitting machine main body 14 is provided with a control unit 14a and a pressure input sensor 14b. The controller 14a is configured to appropriately control the press-fitting speed of the penetrating material M and the amount of fluid supplied to the nozzle 25a. The control method executed by the control unit 14a will be described later.

The pressure input sensor 14b measures the pressure input P applied to the penetrating material M. The pressure input P measured by the pressure input sensor 14b is transmitted to the control unit 14a. The chuck 15 is attached to the front surface of the press-fitting machine body 14 so as to be able to move up and down. The chuck 15 holds the penetrating material M to be press-fitted. The main cylinder 16 drives the chuck 15 to move up and down with respect to the press-fitting machine body 14.

The press-fitting machine 10 obtains a reaction force from the reaction force pile R gripped by each of the plurality of clamp portions 11, and lowers the chuck 15. When the chuck 15 descends by a predetermined amount, the chuck 15 separates the penetrating material M and rises, and grips the penetrating material M again. Then, the chuck 15 descends again. By repeating this operation, the penetrating material M is pressed into the ground. This penetrating material M is pushed down to the same level as the reaction force pile R (position in the vertical direction), and press fitting of the penetrating material M is completed.

After the press-fitting of the penetrating material M is completed, the slide base 13 is moved forward by one pile pitch with respect to the saddle 12. As a result, the chuck 15 moves forward, and a new penetrating material M can be press-fitted in front of the penetrating material M previously press-fitted. In this state, the new penetrating material M gripped by the chuck 15 is pressed into the ground until a predetermined supporting force is obtained. With the new penetrating material M having a predetermined supporting force being held by the chuck 15, the reaction force pile R is released from the clamp portion 11 and the saddle 12 is moved forward by one pile pitch. And the clamp part 11 clamps the upper end part of the reaction force pile R containing the penetration material M which press-fitting was completed, and continues press-fitting of the new penetration material M. The new penetrating material M is pushed down to the same level as the reaction force pile R, and the press fitting of the new penetrating material M is completed.

By repeating the above operation, the press-fitting machine 10 presses a new penetrating material M at a predetermined pile pitch while self-propelled on the row of the reaction force piles R (penetrating material M), and the penetrating material M is inserted. It is possible to construct a row of piles.
The press-fitting machine 10 may be operated by an operator operating the remote controller 30 (operation unit). Alternatively, the press-fitting machine 10 may operate autonomously by automatic control.

(Hose drum device)
The hose drum device 20 is attached to the upper part of the press-fitting machine 10. The hose drum device 20 is configured to feed the hose 25 as the penetrating material M advances. The hose 25 is a hose that advances in the ground together with the penetrating material M when the penetrating material M is press-fitted. A nozzle 25a is attached to the lower end of the hose 25. The nozzle 25a is attached to the lower end of the penetrating material M, and is configured to eject a fluid. The nozzle 25a and the hose 25 are normally recovered after the press-fitting of the penetrating material M is completed.

As shown in FIG. 2, the hose drum device 20 includes a rotary shaft 21, a connection hose 22, and a drum portion 24. The drum portion 24 is rotatably provided around the rotary shaft 21. A hose 25 is wound inside the drum portion 24, and the drum portion 24 rotates around the rotary shaft 21 as the penetrating material M advances. As a result, the hose 25 is sequentially delivered. A connection portion 22a is provided at the end of the connection hose 22. The relay hose 5 is connected to the connecting portion 22a (see FIG. 1).

In the example of FIG. 2, the sensor 23 is provided at the connecting portion 22a. The sensor 23 detects at least one of the pressure, the flow rate, and the flow rate of the fluid. The arrangement of the sensor 23 can be changed as appropriate. For example, as shown in FIG. 3, the sensor 23 may be provided at the connecting portion 5a on the relay hose 5 side. However, it is desirable that the sensor 23 be arranged on the downstream side of the relay hose 5. The reason will be described later.

As described above, the press-fitting system 1 of the present embodiment includes the press-fitting machine 10 for press-fitting the penetrating material M into the ground, and the hose 25 connected to the nozzle 25a attached to the lower end of the penetrating material M. A hose drum device 20 that is fed along with the progress of M, a fluid supply device 3 that supplies fluid to the hose drum device 20 through a relay hose 5, a sensor 23 that is arranged on the downstream side of the relay hose 5, and a nozzle. And a control unit 14a that controls the amount of fluid supplied to 25a (fluid supply amount).

The control of the fluid supply amount may be performed by increasing or decreasing the pressure of the fluid supplied from the fluid supply device 3 to the relay hose 5. In this case, the control unit 14a may control the power supply source 3a of the fluid supply device 3 by wire (control cable 6) or wirelessly.
Alternatively, the fluid supply amount may be controlled by providing a flow rate adjusting valve in the flow path from the fluid supply device 3 to the nozzle 25a and changing the degree of throttling of the flow rate adjusting valve. In this case, the control unit 14a may control the flow rate adjusting valve by wire or wirelessly.

Here, when the penetrating material M is press-fitted into the ground, the ground conditions and the construction state change as the penetrating material M advances. The ground condition is a condition brought about by a difference in the stratum (a change in the ground) depending on the depth, and specifically, soil quality, N value and the like. The state of construction is the presence or absence of blockage of the joint portion between the steel sheet piles when the penetrating material M is a steel sheet pile, or the presence or absence of blockage of the steel pipe pile tip portion when the penetrating material M is a steel pipe pile.

When the ground condition or the construction state changes, the optimum value of the press-fitting speed of the penetrating material M and the optimum value of the fluid supply amount to the nozzle 25a change. Therefore, the control unit 14a of the present embodiment refers to the detection result of the sensor 23 and controls the press-fitting speed and the fluid supply amount to be appropriate values.

(Control method)
The specific control contents will be described below. In this specification, the set maximum value of the pressure input P when the press-fitting machine 10 press-fits the penetrating material M is referred to as the maximum pressure input Pmax.

The maximum pressure input Pmax is set within a range in which the penetrating material M is not bent or twisted, and the posture of the press-fitting machine 10 is not changed. The maximum pressure input Pmax is determined by combining the strength of the penetrating material M and the reaction force obtained from the reaction force pile R. The maximum pressure input Pmax may be determined by adding a certain amount of margin to the theoretical value. The maximum pressure input Pmax is stored in the storage unit included in the control unit 14a.

The control unit 14a of the present embodiment controls the fluid supply amount so that the press-fitting speed of the penetrating material M becomes maximum and the fluid does not become excessive within the range where the press-fitting force is within the maximum pressurizing input Pmax. Further, the control unit 14a changes the press-fitting speed within a range in which the penetrating material M can be press-fitted with a constant press input (set maximum press input Pmax).
For example, when the pressure input P is sufficiently smaller than the maximum pressure input Pmax, the press-fitting speed is increased to the maximum. Nevertheless, when the pressure input is sufficiently smaller than the maximum pressure input Pmax, it means that the fluid supply amount is excessive. Therefore, the fluid supply amount is reduced until the pressure input approaches the maximum pressure input Pmax. Lower.

When the pressure input P reaches the maximum pressure input Pmax, the fluid supply amount is increased. Even if the fluid supply amount reaches the set maximum value, if the pressure input P does not decrease sufficiently compared with the maximum pressure input Pmax, the press-fitting speed is reduced.
If the pressure input P is near the maximum pressure input Pmax and the pressure input P does not change even if the fluid supply amount is increased or decreased, it means that the pressure input P, the press-fitting speed, and the fluid supply amount are appropriate. To do. Therefore, the fluid supply amount before the increase/decrease is restored to maintain the press-fitting speed and the fluid supply amount.

The above control is repeatedly executed as the penetrating material M advances. The repeating span may be every predetermined depth or every predetermined time. For example, the above control may be repeated each time the penetration depth of the penetrating material changes by 1 m, or the above control may be repeated every one minute. Further, when the penetrating material M is inserted while repeating the press-fitting/pulling-out, the above control may be repeated every time the press-fitting/pulling-out operation is performed a certain number of times (for example, once).

As described above, the control unit 14a of the present embodiment, based on the pressure input P when the press-fitting machine 10 press-fits the penetrating material M, controls the penetration material M within the range in which the pressure input P does not exceed the maximum pressure input Pmax. Adjust the fluid supply to maximize the press-fitting speed. With this configuration, the press-fitting speed can be increased as much as possible while supplying the fluid in an adequate amount according to the ground condition and the construction state that change with the progress of the penetrating material M.

Further, in the present embodiment, the fluid supply amount is controlled by referring to the sensor 23 arranged on the downstream side of the relay hose 5. As a result, even if the relay hose 5 is long, it is possible to prevent the control response from decreasing. Further, for example, when the sensor 23 is provided in the fluid supply device 3 on the upstream side of the relay hose 5, the influence of the pressure loss due to passing through the relay hose 5 becomes large, and the fluid ejected from the nozzle 25a is discharged. The condition of can not be grasped accurately. On the other hand, since the sensor 23 is arranged on the downstream side of the relay hose 5, the condition of the fluid ejected from the nozzle 25a can be grasped more accurately, and the adjustment accuracy of the fluid supply amount is improved. To do. Further, it is possible to suppress the decrease in the flow rate caused by passing through the relay hose 5 from affecting the adjustment accuracy of the fluid supply amount.

(Second embodiment)
Next, a second embodiment according to the present invention will be described, but the basic configuration is the same as that of the first embodiment. Therefore, the same reference numerals are given to the same configurations, the description thereof is omitted, and only different points will be described.
The control unit 14a of the present embodiment controls according to the flowchart shown in FIG.

As shown in FIG. 4, when the automatic operation is started, the jet fluid is ejected from the nozzle 25a (step S1). Next, the chuck 15 holds the penetrating material M (step S2). Then, the main cylinder 16 operates and the press-fitting of the penetrating material M is started (step S3). It should be noted that the penetrating material M may be advanced while repeating the press-fitting and drawing-out of the penetrating material M.

When the penetrating material M is press-fitted, the control unit 14a measures the penetrating resistance force (step S4). The penetration resistance is a tip resistance generated when the tip of the penetration material M pushes away the earth and sand, a friction resistance between the penetration materials M, and a friction resistance generated by friction between a surface other than the tip of the penetration material M and the ground. And is the total value of. The penetration resistance force can be measured, for example, by calculating using the measurement result of the pressure input P by the pressure input sensor 14b. When advancing the penetrating material M while repeating the press-fitting and drawing-out of the penetrating material M, the penetration resistance force may be estimated using not only the press-fitting force but also the drawing force. For example, the penetration resistance force may be estimated based on the difference between the pressure input and the pulling force.

Next, the control unit 14a determines whether or not the penetration resistance force increases as the penetration material M advances in the ground (step S5). When it is determined that the increase tendency of the penetration resistance is large (step S5: YES), the control unit 14a increases the fluid supply amount (step S6). When it is not determined that the increasing tendency of the penetration resistance is large (step S5: NO), the control unit 14a determines whether the decreasing tendency of the penetration resistance is large (step S7).

When it is determined that the decrease tendency of the penetration resistance force is large (step S7: YES), the control unit 14a decreases the fluid supply amount (step S8). When it is not determined that the decreasing tendency of the penetration resistance force is large (step S7: NO), the control unit 14a maintains the fluid supply amount.

Next, the control unit 14a determines whether the pressure input P is substantially smaller than the reference pressure input Pb (step S10). Here, the reference pressure input Pb is a reference pressure input preset according to at least one of the penetration depth of the penetrating material M and the ground condition. That is, the reference pressure input Pb is an ideal pressure input value set for each penetration depth and each ground. The reference pressure input Pb is determined by, for example, demonstrating in advance the relationship between the N value and the ideal pressure input in water jet construction. Further, the reference pressure input Pb may be a value obtained by correcting the maximum pressure input Pmax based on, for example, the result of this verification. By adjusting the press-fitting speed so that the difference between the pressure input P and the reference pressure input Pb becomes as small as possible, the construction can be efficiently advanced.

The reference pressure input Pb is stored in advance in the storage unit of the control unit 14a before the start of construction.
In general, when there is no significant change in the formation (soil), the deeper the penetration depth of the penetrating material M, the greater the pressing force. This is because the contact area between the penetrating material M and the ground increases, and the deeper the penetration depth, the tighter the ground is due to the pressure. Therefore, when there is no great change in the formation (ground), the reference pressure input Pb has a curve as shown in FIG. In FIG. 5, the solid line above the reference pressure input Pb indicates the maximum pressure input Pmax. In FIG. 5, the lower solid line shows an example of the value of the pressure input P when the control of the present embodiment is performed.

As shown in FIG. 4, when it is determined that the pressure input P is substantially smaller than the reference pressure input Pb (step S10: YES), the control unit 14a increases the press-fitting speed. When it is not determined that the pressure input P is substantially smaller than the reference pressure input Pb (step S10: NO), the control unit 14a determines whether the pressure input P is substantially larger than the reference pressure input Pb. (Step S12). When it is determined that the pressure input P is substantially larger than the reference pressure input Pb (step S12: YES), the control unit 14a decreases the press-fitting speed (step S13). When it is not determined that the pressure input P is substantially larger than the reference pressure input Pb (step S12: NO), the control unit 14a maintains the press-fitting speed (step S14).

Hereinafter, the flow of steps S3 to S14 is repeatedly executed until the penetrating material M reaches the specified penetration depth.
The "substantially" determination of the magnitude in steps S10 and S12 includes, for example, the determination of the magnitude between the reference pressure input Pb multiplied by a constant coefficient and the pressure input P. Thus, when the pressure input P substantially matches the reference pressure input Pb and can be regarded as ideal, it is possible to prevent the control for changing the pressure insertion speed from being performed. The display of P<Pb and P>Pb in FIG. 4 also includes determination based on a substantial size relationship.

As described above, the control unit 14a of the present embodiment estimates the penetration resistance force by using the press input P generated when the press-fitting machine 10 press-fits the penetration material M, and based on the change of the penetration resistance force, the fluid Adjust the supply. With this configuration, it becomes possible to supply the fluid without excess or deficiency according to the ground condition and the construction condition that change with the progress of the penetrating material M.

Further, the control unit 14a increases the fluid supply amount when the penetration resistance force increases as the penetration depth of the penetration material M increases and decreases the penetration resistance force when the penetration depth of the penetration material M decreases. The fluid supply amount is reduced, and the fluid supply amount is maintained when the penetration resistance does not change as the penetration depth of the penetrating material M increases. Further, the control unit 14a increases the fluid supply water amount when the penetration resistance force increases due to the change of the ground with the penetration depth of the penetration material M, and the penetration resistance force is changed by the change of the ground with the penetration depth of the penetration material M. When becomes smaller, the amount of fluid supply water is reduced. In this way, by increasing/decreasing the fluid supply amount according to the increase/decrease in the penetration resistance force, it is possible to easily set an appropriate fluid supply amount.

Further, the control unit 14a adjusts the press-fitting speed of the penetrating material M based on the comparison between the pressurizing input P and the reference pressurizing input Pb. Specifically, the control unit 14a increases the press-fitting speed when the pressure input P is substantially smaller than the reference pressure input Pb, and press-fits when the pressure input P is substantially larger than the reference pressure input Pb. The speed is reduced, and the press-fitting speed is maintained when the pressure input P and the reference pressure input Pb are substantially the same. This makes it possible to set an appropriate press-fitting speed according to the penetration depth of the penetrating material M and the change of the ground, and it is possible to improve the construction efficiency.

The technical scope of the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the spirit of the present invention.
Further, it is possible to replace the constituent elements in the above-described embodiments with known constituent elements without departing from the spirit of the present invention, and the above-described embodiments and modified examples may be appropriately combined.

3... Fluid supply device 5... Relay hose 10... Press fitting machine 14a... Control part M... Penetration material 20... Hose drum device 23... Sensor 25... Hose 25a... Nozzle

Claims (5)

A press-fitting machine that press-fits the penetrating material into the ground,
A hose connected to a nozzle attached to the lower end of the penetrating material, a hose drum device for feeding the hose as the penetrating material progresses,
A fluid supply device for supplying fluid to the hose drum device via a relay hose,
A control unit for controlling a fluid supply amount, which is the amount of fluid supplied to the nozzle,
The control unit, based on the pressure input P when the press-fitting machine press-fits the penetrating material, has a maximum press-fitting speed of the penetrating material within a range in which the pressure input P does not exceed a maximum pressing input Pmax which is a set maximum value. The press-fitting system adjusts the fluid supply amount so that A press-fitting machine that press-fits the penetrating material into the ground,
A hose connected to a nozzle attached to the lower end of the penetrating material, a hose drum device for feeding the hose as the penetrating material progresses,
A fluid supply device for supplying fluid to the hose drum device via a relay hose,
A sensor that is arranged on the downstream side of the relay hose and detects at least one of pressure, flow velocity, and flow rate of the fluid supplied to the nozzle;
A control unit for controlling a fluid supply amount, which is the amount of fluid supplied to the nozzle, with reference to a detection result of the sensor,
The control unit estimates a penetration resistance force by using a pressure input generated when the press-fitting machine press-fits the penetration material, and adjusts the fluid supply amount based on a change in the penetration resistance force. The controller increases the fluid supply amount when the penetration resistance force increases, decreases the fluid supply amount when the penetration resistance force decreases, and when the penetration resistance force does not change. The press fit system of claim 2, wherein the fluid supply volume is maintained. The control unit adjusts the press-fitting speed of the penetrating material based on a comparison between the press-fitting input of the penetrating material and a reference pressure input preset according to at least one of the penetration depth and the ground condition of the penetrating material. The press-fitting system according to claim 2 or 3. The control unit increases the press-fitting speed when the pressure input is substantially smaller than the reference pressure input, and decreases the press-fitting speed when the pressure input is substantially larger than the reference pressure input. The press-fitting system according to claim 4, wherein the press-fitting speed is maintained when the pressure input and the reference pressure input are substantially the same.

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