JP2588466B2 - Pile press-in automatic control method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pile holding body for a pile press-in / pull-out machine, in which a main hydraulic cylinder and a pulse hydraulic cylinder are provided, and the press input of each hydraulic cylinder is detected. The present invention relates to a pile press-in automatic control method for controlling the operation of each hydraulic cylinder and press-fitting a pile.

[0002]

2. Description of the Related Art FIG. 9 shows a method of press-fitting a pile of a conventional pile press-in / draw-out machine, in which an existing row P of piles such as steel sheet pile is gripped by clamps 1... A slide base 3 is attached to the saddle 2, and a mast 4 provided with a slide rail 6 is provided upright on the slide base 3.
An elevating body 5 is attached to a sliding rail 6 of the mast 4. The chuck body 7 is formed integrally with the tip of the elevating body 5. The vertical movement of the lifting / lowering body 5 is performed by the expansion / contraction operation of the fluid pressure cylinder 14, and the lowering of the chuck 10 attached to the chuck body 7 causes the new pile 15 to move.
Into the ground and construct pile rows.

[0003]

In the case of press-fitting such a pile, if the ground at the press-fitting site is hard, the tip resistance, peripheral frictional resistance and section resistance of the press-fitting pile are large, and the press-fitting of the pile is not easy. . Therefore, the operating pressure of the hydraulic cylinder for lowering the chuck must be increased. For this reason, the pile press-in and pull-out machine became large.

[0004]

In order to solve the above problems, first, a chuck for holding a press-fitting pile is held.
Main fluid pressure cylinder for lowering the chuck body
High-speed reciprocating operation of the chuck with respect to the chuck body
With the pulsed fluid pressure cylinder
In accordance with the rising operation of this pulse fluid pressure cylinder,
The lowering of the main fluid pressure cylinder is stopped . Second, actuate the main hydraulic cylinder
The pressure input limits the press-fit limit of the main hydraulic cylinder.
When the value exceeds the set value, the pulse fluid pressure cylinder is
It is characterized by being operated and controlled as described above . Third
Activate the pulse fluid pressure cylinder and press the input
If it is less than the set value corresponding to the upper
The main fluid pressure cylinder is activated when
Is controlled as follows.

[0005]

The first pile press-in automatic control method according to the above configuration is as follows.
Main according to the rising operation by the pulse fluid pressure cylinder
Has the descent of the fluid pressure cylinder been stopped?
Avoids the reverse operation between the two, and only the press-fit operation is superimposed.
For relatively hard ground suitable for cooperation between the two.
Press-fitting work can be performed efficiently and quickly.
The second automatic pile press-in control method uses
Activated and its pressure input is the pressure limit of the main hydraulic cylinder
When the value exceeds the set value,
By operating the damper, it is compatible with press-in including soft ground
can do. The third method of automatically controlling the pile press-in
Activate the hydraulic cylinder and press the
When the value falls below the set value corresponding to the upper limit of cylinder operation
Since the main hydraulic cylinder is operated,
It is possible to cope with press-fitting including the ground .

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. A slide base 3 is slidably mounted on a saddle 2 on which a clamp 1 for gripping an existing pile P is hung.
A mast 4 is erected on the upper portion of the slide base 3, and a sliding rail 6 on which a lift 5 moves up and down is provided at the front of the mast 4.
Is installed. A chuck body 7 is integrally formed at the tip of the elevating body 5, and a main fluid pressure cylinder 8 for driving the chuck body 7 up and down is vertically mounted between the front part of the slide base 3 and the elevating body 5. .

[0007] Inside the chuck body 7, a chuck 10 that moves up and down in the chuck body 7 through a chuck rotating part 16 is guided by a sliding rail and rotation stopping ridge 9 formed on the inner peripheral surface thereof. It is decorated. A pulse fluid pressure cylinder 11 is mounted between the chuck body 7 and the chuck 10 via the chuck rotating unit 16. With this configuration, the chuck 10 can be moved up and down separately by the main fluid pressure cylinder 8 and the pulse fluid pressure cylinder 11, and can be moved up and down by both fluid pressure cylinders 8 and 11 at the same time. The rotation of the chuck rotating unit 16 is transmitted to a gear 17 by a rotating mechanism (not shown), and the chuck rotating unit 16 can rotate inside the chuck body 7. With this rotation, the chuck 10 rotates at the same time because it is engaged by the slide rail and the rotation stopping ridge 9. A repulsion cylinder 12 provided between the rear portion of the mast 4 and the slide base 3 is for applying a pressing force to the pile press-in / pull-out machine to prevent the pile press-in / pull-out machine from tilting.

Next, the operation of the embodiment of the present invention will be described with reference to FIGS. In the present invention, the chuck 10 is moved up and down.
A predetermined press fit into the main fluid pressure cylinder 8 to be moved
The force value is set, and the set pressure input value is
(See FIG. 8). When the ground is hard at the pile injection site and the pile cannot be pressed by the operation of the main fluid pressure cylinder 8, the pulse fluid pressure cylinder 11 is reciprocated at a high speed at first, and the tip of the pile is crushed on the hard top and the tip of the pile is moved. Press the pile into the soil while reducing the resistance.

At this time, as shown in FIGS. 5 and 8, the fluid pressure of the pulse fluid pressure cylinder 11 is detected by a fluid pressure sensor attached to the pulse fluid pressure cylinder 11, and the detected value is input to the arithmetic unit 13. Then, when it is determined that the value is equal to or less than the set value in comparison with the set pressure input value for operating the main fluid pressure cylinder 8 stored in the arithmetic unit 13 in advance,
The main fluid pressure cylinder 8 is operated to press-fit the pile. In this case, the pressure input value of the main fluid pressure cylinder 8 is determined according to conditions such as soil properties and ground hardness, and needs to be changed according to the conditions. However, an average value may be set.

Next, first, the main fluid pressure cylinder 8 is operated to lower the pile held by the chuck 10 together with the chuck body 7 to press the pile into the soil. In this case, the pulse fluid pressure cylinder 11 has stopped supplying the pressure fluid, and the pile is lowered and press-fitted together with the chuck body 7. As shown in FIGS. 6 and 8, when the main fluid pressure cylinder 8 is operated, its pressure input value is always detected by a sensor and input to the arithmetic unit 13, and the pressure input value of the main fluid pressure cylinder 8 stored in the arithmetic unit 13 is stored. It is compared with the set pressure input value to execute the press-fitting of the pile.

[0011] encounters a hard ground with was pressed into a certain depth of the pile, when the press-fitting force value of the main hydraulic cylinder 8 is turned on setting the press-fitting force Ne以 is determined by the arithmetic unit 13, pulse fluid The pressure cylinder 11 operates . When even pressure input value of the main hydraulic cylinder is turned on set pressure input Ne以 to continue press-fitting of the pile, the existing pile since the predetermined reaction force or reaction force to clamp sandwiching the existing pile is applied and or extracted from the ground will not be able to be pressed successfully pressed pile slope pile press-drawing machine, pulsed flow to prevent this
The body pressure cylinder 11 is operated. The chuck 10 reciprocates at a high speed by the pulsed fluid pressure cylinder 11 and crushes the hard top of the pile tip, so that the tip resistance is reduced, and the pile peripheral surface resistance and section resistance are also reduced. Can be press-fitted.

Next, by simultaneously operating the main fluid pressure cylinder 8 and the pulse fluid pressure cylinder 11, the respective press inputs act synergistically to act on the chuck 10 and the chuck body 7, so that the press-fitting speed of the pile is increased. . In this case, as shown in FIG. 7 and FIG.
When one of the detected fluid pressure force pulse fluid pressure cylinder is determined to be not in lowering operation the main hydraulic cylinder 8
Of the fluid pressure cylinders 8 and 1
1 to cooperate to increase the press-fitting speed. Since the press-fitting operation time can be shortened in this way, workability is improved. The above explanation is
Main fluid pressure cylinder 8 and pulse fluid pressure cylinder 11
Of the main fluid pressure system.
Compared to the set value of the cylinder 8, the cylinders 8 and 10
The fluid flow rate may be detected. Detecting fluid flow
The speed at which the press-fitting stake is pressed
This is because it can be grasped. In this case, the main stream
Instead of the pressure input value set for the body pressure cylinder 8,
The fluid flow rate of the fluid 8 is set, and this set value is sent to the arithmetic unit 13.
The main hydraulic cylinder 8 and the pulse hydraulic system are stored.
By comparing with each detection value of Linda 11,
Control can be performed.

[0013]

According to the first method for automatically controlling the press-fitting of piles according to the present invention,
Main according to the rising operation by the pulse fluid pressure cylinder
Has the descent of the fluid pressure cylinder been stopped?
Avoids the reverse operation between the two, and only the press-fit operation is superimposed.
For relatively hard ground suitable for cooperation between the two.
Press-fitting work can be performed efficiently and quickly .
The second automatic pile press-in control method uses
Activated and its pressure input is the pressure limit of the main hydraulic cylinder
When the value exceeds the set value,
By operating the damper, it is compatible with press-in including soft ground
Can be done . The third method of automatically controlling the pile press-in
Activate the hydraulic cylinder and press the
When the value falls below the set value corresponding to the upper limit of cylinder operation
Since the main hydraulic cylinder is operated,
It is possible to cope with press-fitting including the ground .

[Brief description of the drawings]

FIG. 1 is a side view of a pile press-in / pull-out machine for controlling the present invention.

FIG. 2 is a longitudinal sectional side view taken along line AA of FIG. 3;

FIG. 3 is a plan view taken along line BB of FIG. 1;

FIG. 4 is a plan view of a pile press-in / pull-out machine for controlling the present invention.

FIG. 5 is a flowchart showing an operation of the present invention.

FIG. 6 is a flowchart showing an operation of the present invention.

FIG. 7 is a flowchart showing an operation of the present invention.

FIG. 8 is a block diagram of a control system according to the present invention.

FIG. 9 is a side view of a conventional pile press-in and pull-out machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamp 2 Saddle 3 Slide base 4 Mast 5 Elevator 6 Sliding rail 7 Chuck body 8 Main fluid pressure cylinder 9 Sliding rail and rotation stop ridge 10 Chuck 11 Pulse fluid pressure cylinder 12 Rebound cylinder 13 Computing device 14 Fluid pressure cylinder 15 New pile 16 Chuck rotating part 17 Gear P Existing pile

Claims (3)

(57) [Claims] A chuck for holding a chuck for holding a press-fitting pile.
A main fluid pressure cylinder for lowering the jack body,
High-speed reciprocating operation of the chuck with respect to the chuck body
Together with the pulse fluid pressure cylinder,
Before moving up with this pulse fluid pressure cylinder,
An automatic pile press-in control method, wherein the lowering of the main hydraulic cylinder is stopped . 2. The main fluid pressure cylinder is operated, and
Is set so that the press-in force of
Value, the pulse fluid pressure cylinder is activated.
2. A method for automatically controlling the press-fitting of a pile according to claim 1, wherein
Law. 3. The pulse fluid pressure cylinder is operated, and
Pressure input corresponds to the upper working limit of the main hydraulic cylinder
When the value falls below the set value, the main fluid pressure cylinder is
The method according to claim 1, wherein the pile is automatically driven.