JPH06136967A - Uneven settlement correcting device for structure - Google Patents

Abstract

PURPOSE:To collectively manage jack-up work, ensure safety, and save power by restarting oil pressure supply all together after stopping all hydraulic jacks in jack-up start position. CONSTITUTION:When a hydraulic jack 1... is extended and makes contact with a structure, a load is added to the hydraulic jack 1 to raise the oil pressure supplied from a power unit 2..., and the detected pressure of a pressure sensor 7 is raised. A controller 10 stops the oil pressure supply to the hydraulic jack 1 on the basis of this pressure rise, and the hydraulic jack 1 is stopped in the jack-up start position where it makes contact with the structure. When all the hydraulic jacks 1 are stopped in the jack-up start position, then, the controller 10 restarts the oil pressure supply of each hydraulic jack 1 all together. The difference between the stroke distance of each hydraulic jack 1 and the minimum value exceeds a determined value, the extension of the hydraulic jack 1 is stopped, and the extension is restarted when the difference is solved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a differential subsidence correcting device for correcting a differential subsidence of a building by jacking up.

[0002]

2. Description of the Related Art A device for correcting uneven settlement of a building by jacking up is known. This is to fix the level of the submerged building by inserting a hydraulic jack between the pillars and beams of the building and the foundation and extending the hydraulic jack according to the subsidence. The hydraulic pressure is supplied from a power unit including a hydraulic pump or the like via a valve.

[0003]

In this case, the adjustment of the jack-up height is performed by the operator manually controlling the valve while visually measuring the stroke distance of each hydraulic jack, but the stroke distance is visually monitored. There is a possibility of making a measurement error, and an operator was required for each hydraulic jack. In addition, when jacking up a plurality of locations at the same time, it is difficult to grasp the jack-up status at once, and it is difficult to keep a record of correction work.

The present invention has been made to solve the above-mentioned problems in the differential settlement correction work, and an object thereof is to provide a differential settlement correction device capable of centrally managing jack-up work at a plurality of locations.

[0005]

The present invention comprises a hydraulic jack interposed between a structure and a foundation, a power unit for supplying hydraulic pressure to the hydraulic jack, and a pressure sensor for detecting the pressure of the power unit. Multiple jack-up devices, a controller that controls the supply of hydraulic pressure from each power unit to the hydraulic jack, a means to temporarily stop the hydraulic supply from the power unit to the hydraulic jack when the pressure detected by the pressure sensor rises, and all hydraulic pressure. Means for restarting the hydraulic pressure supply to all the hydraulic jacks together after the hydraulic pressure supply to the jacks is stopped.

The present invention further includes a stroke sensor for detecting the stroke position of each hydraulic jack, and means for calculating the stroke distance of each hydraulic jack after the hydraulic pressure is resumed from the stroke position of each hydraulic jack detected by the stroke sensor. A means for obtaining the minimum value of each of these stroke distances, and when the difference between the obtained minimum value and each stroke distance exceeds a predetermined value, the hydraulic pressure supply to that hydraulic jack is stopped, and the stroke of the hydraulic jack with the minimum stroke distance is And a means for restarting the hydraulic pressure supply when the distance becomes equal to the stroke distance of the hydraulic jack that stopped the hydraulic pressure supply.

[0007]

[Operation] When the hydraulic jack extends and contacts the structure,
The load is applied to the hydraulic jack, the hydraulic pressure supplied from the power unit rises, and the pressure detected by the pressure sensor rises. The stopping means stops the hydraulic pressure supply to the hydraulic jack in response to this pressure increase, so that the hydraulic jack stops its extension at the jack-up start position in contact with the structure.
After all the hydraulic jacks have reached the jack-up start position, the restarting means resumes the hydraulic pressure supply to each hydraulic jack at the same time, so the jack-up of each part of the structure is started at the same time, and the load is not biased to a specific hydraulic jack. .

Further, when the difference between the stroke distance of each hydraulic jack and this minimum value exceeds a predetermined value, the extension of the hydraulic jack is stopped, and the hydraulic jack having the minimum stroke distance stops the stroke distance of the hydraulic jack. Since the extension of the stopped hydraulic jack is resumed after the extension, the variation in the stroke distance between the hydraulic jacks is eliminated, and it is possible to surely jack up the structure and prevent the uneven load of the hydraulic jack.

[0009]

1 to 3 show an embodiment of the present invention.

In FIG. 1, reference numeral 1 is a jack unit which is a set of four hydraulic jacks. These hydraulic jacks are driven to expand and contract by the hydraulic pressure supplied from the hydraulic power unit 2.

Each hydraulic jack has a hydraulic power unit 2
A check valve is provided at the pressure oil introduction port to prevent the pressure oil from flowing back and the hydraulic jack from contracting when the hydraulic pressure supply from is stopped.

The hydraulic power unit 2 includes a hydraulic pump 3 and
A motor 4 that rotationally drives the hydraulic pump 3, and a hydraulic pump 3
Of the directional control valve 5 for connecting the discharge oil of the above to each hydraulic jack of the jack unit 1, the tank 6 for storing the hydraulic oil for suction of the hydraulic pump 3, the pressure sensor 7 for detecting the discharge pressure of the hydraulic pump 3, and the control It is composed of a board 8.

The directional control valve 5 is provided with a position for supplying hydraulic pressure to the expansion side of each hydraulic jack, a position for supplying hydraulic pressure to the contraction side, and a position for blocking the entry and exit of hydraulic oil of the hydraulic jack.

A stroke sensor 9 for detecting a stroke position is attached to each hydraulic jack of the jack unit 1, and a stroke position signal detected by the stroke sensor 9 and a pressure signal detected by the pressure sensor 7 are provided on the control panel 8.
Signal is input to.

A movable controller 10 is provided for centrally controlling the plurality of sets of jack units 1 and hydraulic power unit 2 configured as described above.

The controller 10 is connected to the control panel 8 of each hydraulic power unit 2 by a signal line 11, and each control panel 8 is connected.
To the identification number of the hydraulic power unit 2 and the pressure sensor 7
And the stroke position signal from the stroke sensor 9 are input.

Although the stroke position signal from the stroke sensor 9 is individually measured for the four hydraulic jacks, the controller 10 uses, for example, an average value of these as a representative value of the jack unit 1.

The controller 10 includes a display 12 for indicating the control status of each jackup unit 1, a data recording device, and a keyboard 1 for inputting commands and numerical values.
3 and a memory for storing an input signal.

When the pressure signal input from each hydraulic power unit 2 rises to a predetermined value, the controller 10
The operation of the motor 4 of the hydraulic power unit 2 is stopped to cut off the hydraulic pressure supply to the jack unit 1.

After the operation of the motors 4 of all the hydraulic power units 2 is stopped in this way, the motors 4 are restarted all together and the hydraulic pressure supply to the jack unit 1 is restarted.

The controller 10 further calculates the stroke distance from the hydraulic supply restart position of the jack unit 1 from the stroke position signal of the hydraulic jack, and selects the minimum value thereof.

Further, the difference between this minimum value and the stroke distance of each jack unit is calculated, and when this difference reaches a preset reference value (for example, 5 mm), the operation of the motor 4 of the hydraulic power unit 2 is stopped. To do.

When the jack unit 1 showing the minimum stroke distance extends and becomes equal to the stroke distance of the jack unit 1 which has stopped the hydraulic pressure supply, the motor 4 which has stopped the operation is restarted to supply the hydraulic pressure. The oil pressure supply to the jack unit 1 which has been stopped is restarted.

The control panel 8 of each jack unit 1 is provided with a changeover switch with a monitor lamp for individually operating the hydraulic power unit 2 not from the controller 10 but for each jack unit 1.

Next, the operation will be described.

The correction work for the differential settlement is performed according to the sequence shown in FIGS. That is, the jack unit 1 is arranged on the pillar of the building to be modified (S1), and the rubber hose for hydraulic piping and the signal line of the stroke sensor 9 are connected to the hydraulic power unit 2 (S2, S3). Further, the signal line 11 is connected between the hydraulic power unit 2 and the controller 10 (S4).

When these connections are completed, the hydraulic power unit 2 and the controller 10 are powered on (S5).
S6). In addition, the changeover switch of the hydraulic power unit 2 is switched to the automatic operation side in advance.

After the above preparatory work is completed, the jack-up correction amount α is input to the controller 10 from the keyboard 13 (S7), and the directional control valve 5 of each hydraulic power unit 2 is manually switched to the extended position ( S8),
Start the automatic operation of the controller 10 (S
9). After that, all the operations are performed under the automatic control by the controller 10 until the correction work is completed.

With the start of the automatic operation, each hydraulic power unit starts operating, and the discharge oil of the hydraulic pump 3 is supplied to the jack unit via the direction switching valve 5, and the hydraulic jacks extend together (S10).

At the same time, detection of the stroke position by the stroke sensor 9 and detection of the discharge pressure of the hydraulic pump 3 by the pressure sensor 7 are started, and the stroke position signal and the pressure signal are input to the control panel 8 (S11, S12). .

These signals are input to the controller 10 from the control panel 8, and the controller 10 stops the operation of the motor 4 from the hydraulic power unit 2 when the pressure signal reaches a predetermined value. (S13). The jack unit 1 extends without resistance until it comes into contact with the pillar to be jacked up, but when it comes into contact with the pillar, the load sharply increases and the discharge pressure of the hydraulic pump 3 also sharply increases. The controller 10 thus stops the operation of the motor 4 in response to the increase in the pressure signal, so that the extension of the jack unit 1 is stopped at the jack-up start position where the jack unit 1 is in contact with the pillar.

The controller 10 stores the stroke position signal of each jack unit 1 at the jack-up start position in the memory.

Thus, by stopping the jack unit 1 at the jack-up start position, the actual jack-up distance can be accurately controlled. In addition, even if the anchor bolts that fix the pillars to be jacked up are not completely loosened, the jack unit 1 should be installed before applying unnecessary load to the building.
Since the extension of the building stops, it is possible to prevent accidents that may damage the building due to a mistake.

If an unexpanded hydraulic jack is found after the expansion stop operation, the operation of the motor 4 of the hydraulic power unit 2 supplying the hydraulic pressure to the unexpanded hydraulic jack is stopped and the display 12 is displayed. Display a message informing you that an error has occurred. Accordingly, even if the return passage is blocked due to a connection mistake of the coupler of the hydraulic pipe in the return passage of the hydraulic oil discharged from the hydraulic jack during extension, for example, it is possible to prevent the hydraulic jack from being damaged by the high pressure.

Further, since all the jack units 1 are temporarily stopped at the jack-up start position, it is possible to reconfirm the release of the anchor bolt and the installation state of the hydraulic jack in this state to ensure safety.

In this way, when the jack unit 1 is aligned with the jack-up start position, the controller 10 restarts the motor 4 of each hydraulic power unit 2 again (S14) to start the jack-up. At the same time, the input of the stroke signal from the stroke sensor 9 is restarted (S15).

Controller 10 during jack-up work
Calculates the stroke distance from this stroke signal, calculates the difference in stroke distance between the jack units 1, and determines whether the difference is 5 mm or less, which is the set value (S16).

If the stroke distance is 5 mm or less, and the stroke distance is equal to or less than the preset correction amount α, the jack-up is continued (S22).

If it is 5 mm or more, the operation of the motor 4 of the hydraulic power unit 2 supplying the hydraulic pressure to the jack unit 1 having a large stroke distance is stopped, and the extension of the jack unit 1 is stopped (S18). As a result, when the jack unit 1 having a short stroke distance extends and reaches a stroke distance equal to that of the jack unit 1 that has stopped extending (S19), the extension of the jack unit 1 that has stopped extending is restarted (S20).

Therefore, there is no difference in stroke distance of 5 mm or more between the jack units 1, and the synchronous extension of the jack units 1 is substantially guaranteed.

Further, this can prevent the inconvenience that the load is concentrated on the specific jack unit 1.

When the stroke distance of the jack unit 1 reaches the preset correction amount α, the operation of the motor 4 of the hydraulic power unit 2 is stopped, and the jack unit 1 stops the extension at that position (S22, S2).
3).

In this way, all the jack units 1 extend synchronously up to the set correction amount, so the liner may be inserted in this state (S24).

In S17, the stroke distance is 9
Although it is confirmed whether it is less than 5 mm, this is because the maximum stroke distance of the jack unit 1 considering the safety factor is set to 95 mm, and the jack-up correction amount α is erroneously set to a value larger than this. Even if it is given, when the jack unit 1 reaches the maximum stroke distance, the hydraulic power unit 2 automatically stops and the jack unit 1
Is fully prevented (S21).

Further, the level correction amount of the building and the change state of the load due to the jack-up are recorded in a recording device provided in the controller 10 and can be referred to as necessary after the work.

Although the jack-up correction amount is the same for each jack unit 1 in the above description, these jack units 1 are applied to the same pillar of a building that has been sunk differently. Then, a plurality of such uneven settlement correction devices are used, and the uneven settlement is corrected by jacking up the building by changing the correction amount for each pillar.

[0047]

As described above, according to the present invention, the hydraulic pressure supply to the hydraulic jacks is temporarily stopped when the pressure detected by the pressure sensor rises, and the hydraulic pressure supply is restarted after the hydraulic pressure supply to all the hydraulic jacks is stopped. The extension of the hydraulic jack can be automatically stopped at the jack-up start position.

Further, when the difference between the stroke distance of each hydraulic jack and its minimum value exceeds a predetermined value, the extension of the hydraulic jack is stopped, and when the difference is resolved, the stopped extension of the hydraulic jack is restarted. , Variation in stroke distance between hydraulic jacks during jacking up is eliminated.

Therefore, the stroke position control of a large number of hydraulic jacks can be intensively performed, work mistakes in the jack-up work can be prevented, safety can be improved, and the labor of the jack-up work can be greatly saved. .

[Brief description of drawings]

FIG. 1 is a configuration diagram of a differential settlement correction device showing an embodiment of the present invention.

FIG. 2 is a flowchart showing a work process of the differential settlement correction device.

FIG. 3 is a flowchart showing a work process of the differential settlement correction device.

[Explanation of symbols]

 1 Jack unit 2 Hydraulic power unit 7 Pressure sensor 9 Stroke sensor 10 Controller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masato Ota, Inoue Kokan Town, Tsu City, Mie Prefecture (no address) Inside the Mie Factory, Kayaba Industry Co., Ltd. (72) Shinichi Ota, 4 Kitahama Higashi, Chuo-ku, Osaka City, Osaka Prefecture No. 33 Obayashi Corporation (72) Inventor Hideo Yamabe 4-33 Kitahama East, Chuo-ku, Osaka City, Osaka Prefecture Incorporated (72) Inventor Isamu Kagawa 4-33 Kitahama East, Chuo-ku, Osaka City, Osaka Company Obayashi

Claims (2)

[Claims] 1. A plurality of jack-up devices each comprising a hydraulic jack interposed between a structure and a foundation, a power unit for supplying hydraulic pressure to the hydraulic jack, and a pressure sensor for detecting the pressure of the power unit, and a plurality of jack-up devices. A controller that controls the hydraulic pressure supply from the power unit to the hydraulic jacks, a means for temporarily stopping the hydraulic pressure supply from the power unit to the hydraulic jacks when the pressure detected by the pressure sensor rises, and the hydraulic pressure supply to all hydraulic jacks has stopped. A differential settlement correction device for a structure, characterized in that it is provided with means for resuming hydraulic pressure supply to all hydraulic jacks at the same time. 2. A stroke sensor for detecting a stroke position of each hydraulic jack, a means for calculating a stroke distance of each hydraulic jack after resuming hydraulic pressure supply from a stroke position of each hydraulic jack detected by the stroke sensor, and each of these means. A means for obtaining the minimum stroke distance, and when the difference between the obtained minimum value and each stroke distance exceeds a specified value, the hydraulic pressure supply to the hydraulic jack is stopped, and the stroke distance of the hydraulic jack with the minimum stroke distance is the hydraulic pressure. The differential settlement correction apparatus for a structure according to claim 1, further comprising means for restarting the hydraulic pressure supply when the stroke distance of the hydraulic jack that has stopped the supply becomes equal.