JPH02128076A - Compensator for level of structure - Google Patents

Abstract

PURPOSE:To prevent the deformation of a structure generated by the unequal settling of a floating foundation positively by detecting relative displacement to the level of a reference and conducting lifting-up or -down so that the displacement is brought to zero. CONSTITUTION:A structure 30 constructed onto a floating foundation 20 is supported by a plurality of hydraulic jacks 22. A reference manometer 1 mounted at the specified reference position of the structure 30 and displacement manometers 2 set up to each foundation beam 31 in support sections, to which separate jack 22 is fitted, are installed for measuring the level of the structure 30. These manometers are connected mutually by communicating tubes 3. The level of a liquid (water) fed to the ducts is adjusted at a constant level at all times by operating the opening and closing of a water filling valve 4 and a drain valve 5. Accordingly, the level can be corrected accurately by full automation.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of use for business owners) The present invention relates to a level correction device for structures built on soft ground or the like.

(Conventional technology) When constructing structures such as buildings on soft ground such as reclaimed land,
Conventionally, construction methods have been used to solidify the foundations of structures by driving long concrete piles deep underground until they reach the bedrock.

However, in recent years, the 70-ting foundation method, which can be constructed at a lower cost than this pile driving method, has begun to be widely adopted.

This 70-ting foundation literally supports the structure with its foundation floating in the ground, and fjSG
As shown in the figure, the base vP is formed into a box shape like a ship!
20 supports the weight of the structure 30 which is balanced with the weight of the excavated soil.

However, this 70-ting foundation 20 causes uneven settlement, in which parts of the foundation 20 subside until the soft ground settles over time, so a part of the structure 30 may be deformed or
Cracks could occur.

(Problem to be solved by the invention) 70-
Modifications were made to maintain the horizontal state by leaving the foundation as it is and making it possible to separate it from the structure built on top of it, and jacking up the floor surface of the h1 structure in the sunken part. Ta.

However, since this level correction relies heavily on manual labor, it is difficult to measure the level by crawling under the floor of the structure and to carry out jack-ups while carrying a hydraulic jack (particularly when the structure is large). It was extremely time-consuming.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by providing a device that can detect a level change in a structure and automatically correct the level.

(Means for Solving the Problems) Therefore, the present invention provides a large number of elevating drive means for supporting a structure with respect to a 70-ting foundation, and a means for measuring the level of the structure at each of these supporting parts. A means for detecting a relative displacement of this detection level from a preset reference plane is provided, and a control means is provided for driving the elevating and lowering drive means to expand and contract so that this relative displacement becomes approximately zero.

A reference manometer that detects the liquid level at the reference position of the structure and a displacement manometer that is attached to each jack support part of the structure and detects a predetermined liquid level are connected by a communication pipe to the reference manometer. A control means is provided to pump the water so that the liquid level is constant, and the displacement 7
According to the output of the manometer, the gloss of the displacement manometer installation area is driven to expand and contract.

(Function) Therefore, in a structure supported by a lifting drive means with respect to a 70-ring foundation, when the level of each support part fluctuates, the relative displacement with respect to the reference level is detected, and this displacement is adjusted to zero. lift up or down. Therefore, deformation of the structure caused by uneven settlement of the 70-ting foundation can be reliably prevented.

In addition, by installing a displacement manometer on each jack support and connecting it to the standard manometer through a communication tube, it is possible to immediately detect level fluctuations in each jack support, and the jack of the corresponding part can be expanded or contracted. By driving, accurate level correction can be performed automatically. Note that even if the level fluctuation of the jack support part is caused by oil leakage that is inevitable when using hydraulic gloss or the like, it can be compensated for in the same way.

(Example) Embodiments of the present invention will be described according to the drawings.

As shown in FIG. 1131, the structure 30 built on the 70-ting foundation 20 is supported by a plurality of hydraulic jacks 22. These hydraulic jacks 22 are installed at each intersection 21 of the 70-ting foundations 20 arranged vertically and horizontally, and support the foundation beams 31 at the bottom of the structure 30 from below (f: see IS3 diagram).

In order to measure the level of the structure 30, a "reference manometer" installed at a predetermined reference position of the structure 30 and a displacement manometer 2 each attached to the foundation beam 31 at the support part where each jack 22 is installed are provided. These are connected to each other by a communication pipe 3, and the liquid level of the liquid (water) supplied to this pipe is kept constant by repeatedly opening and closing the water injection valve 4 and the drain valve 5, as described later. is adjusted to the level of

As shown in FIG. 2, the reference manometer 1 is equipped with a liquid level sensor 7 that detects a reference liquid level, whereas each displacement manometer 2 outputs an output when the liquid level reaches a predetermined level. A level sensor 8 that generates the liquid level, and an upper limit sensor 9a and a lower limit sensor 9b that detect the upper and lower limit positions of the liquid level, respectively.
Equipped with.

Signals from each sensor 7.8.9a, 9b are input to the controller 10.

The controller 10 is composed of a microcomputer or the like that processes these input signals, and based on the calculation results, opens and closes the water injection valve 4 or the drain valve 5 so that the liquid level measured by the sensor 7 remains constant.

Furthermore, as shown in FIG. 13, the controller 10 switches the electromagnetic switching valve 23 that controls the supply of hydraulic oil to the jack 22 so that the level detected by each sensor 8 matches the reference level. to expand and contract the jack 22.

By switching the electromagnetic switching valve 23, the hydraulic pressure source 24 is selectively connected to the oil chambers 22a and 22b inside the jack 22, and pressurized oil is fed thereto. That is, by sending pressure oil into the lower oil chamber 22a, the jack 22 is expanded, and the upper oil chamber 22a is expanded.
When pressure oil is sent to b, it contracts. The pressure of the hydraulic oil to be supplied is adjusted to a constant value by a pressure control valve 25, and in order to control the speed at which the jack 22 contracts, a throttle 26b is provided in each circuit in parallel with the check valve 26a. Ru. 27 is a pilot operated check valve, which closes in the normal holding state to prevent the jack 22 from contracting, but opens with pilot pressure when the jack is lowered.
Allows for contraction.

The structure is as described above, and then Fig. 4 and 7 of the PISS diagram
The operation will be explained with reference to the 0-chart.

In the initial state, the displacement manometers 2 located at the support of each jack 22 and attached to the structure are set at the same level, and at the reference level of the reference manometer 1 installed at a predetermined reference position. is also set to match.

The controller 10 controls the liquid level so that the liquid level detected by the reference manometer 1 is always at the reference level.

FIG. 4 is a chart 7a of this liquid level control. It is determined whether the liquid level detected by the reference manometer 1 is above or below the reference level, and if the liquid level is above the reference level, the tr drain valve 5 is set to r5.
11, lower the liquid level (steps 50 to 52), judge whether the lowered liquid level has reached the reference level (step 53), repeat the same operation until it reaches the reference level, and when it reaches the reference level, close the drain valve 5. (step 54).

If the detected liquid level is below the reference level, open the water injection valve 4 to raise the liquid level (step 55.5G), and check whether the liquid level has reached the reference level in step 57. When the liquid level reaches the reference level, the water injection valve 4 is closed (step 58).

In this way, a constant liquid level is maintained at all times, thereby avoiding measurement errors due to level fluctuations at each measurement location or due to evaporation. 6. Measurement location where the displacement manometer 2 is installed. When there is no level fluctuation, each displacement manometer 2 also outputs that the liquid level is at the reference level. On the other hand, when a level fluctuation occurs, the output of the displacement manometer 2 at that part changes, that is, the liquid level rises from the reference level due to sinking of the 70-ting foundation 20, or conversely, it falls. , outputs top or bottom accordingly.

When there is a change in the liquid level, the hydraulic jack 22 at the corresponding measurement location is activated to correct the level.

Figure f55 is a 70-chart for level correction, and in step 60, it is determined from the output of each displacement manometer 2 whether the liquid level is above or below the reference level. When it is detected that the liquid level is above, it means that the foundation in that area is sinking, so the electromagnetic switching valve 23 is operated in the direction of raising the jack 22 (step 61).

After this jack-up, the output of the lower limit liquid level sensor 9b is checked to determine whether the liquid level has not reached the lower limit value (step 62).If the level increases abnormally due to malfunction of the jack-up, etc. It immediately issues a warning and stops the expansion and contraction of the jack 22 (steps 67 and 68).

If there is no abnormality, it is determined in step 63 whether or not the standard liquid level has been reached, and the jacking up is repeated until the level drops to the standard liquid level. When the standard liquid level is reached, the original operation of the jacking 22 is stopped.

In addition, in step 60, when the detected liquid level is lower than the reference level, that is, when the level at the measurement site is too high, the electromagnetic switching valve 2 is moved in the direction of lowering the jack 22.
In step 64, it is determined whether the jacking is operating normally based on the output of the upper limit liquid level sensor 9a.
．． 65) When an abnormality occurs, an alarm is output and the system is stopped in the same manner as described above.

During normal operation, the jack 22 is lowered until the liquid level rises to the reference liquid level (step 66), and when the reference liquid level is reached, the jack operation is stopped.

In this way, the level is corrected by operating the jack 22 in 5 minutes after the level fluctuation occurs, so that distortion of the overall structure 30 can be completely automatically and reliably prevented.

In addition, when jacking up, etc., the upper and lower limit liquid level sensors 9
Since the outputs of a and 9b are monitored, it is possible to prevent excessive level correction due to abnormal operation of the jack 22, thereby ensuring the safety of the system. This level fluctuation is caused by the hydraulic jack 2 supporting the foundation beam 31.
2, even if it is caused by a minute oil leak from itself, it can be compensated for in the same way.

Incidentally, the level correction operation in the present invention is performed while looking at the relative level difference between the part where the displacement 7-nometer 2 is installed and the part where the reference manometer 1 is installed. When this happens, the level is not corrected and the jack 22 maintains its stroke position. Therefore, unlike adjusting the level based on an absolute reference position (height), the effective stroke amount of the glossy 22 does not need to be so large. This can be determined using the maximum value of relative displacement in each part of the 70-ting foundation as a guide. Therefore, the jack 22 serving as the lifting/lowering driving means may be relatively small.

Note that, instead of the hydraulic jack 22, various lifting/lowering drive means such as an electric motor and a screw jack can be used.

(Effects of the Invention) As described above, according to the present invention, the level is automatically corrected while detecting the level of each part of the structure supported on the 70-Ting foundation, so correction for uneven settlement is fully automatic. can be performed with high precision, making maintenance of structures extremely easy.

Furthermore, since the level correction is performed not while measuring the absolute level position of the structure, but while detecting the relative displacement difference, the effective stroke amount of the lifting drive means is also 70-
It is only necessary to cover the relative level fluctuation range of the timing foundation, and therefore the device can be made more compact.

Since the level correction is a feed rate control based on actual level fluctuations, it is possible to compensate not only for uneven settlement of the 70-ring foundation, but also for positional fluctuations (leakage operations) of the lifting drive means itself.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of an embodiment of the present invention, Fig. 2 is a configuration diagram of the level measurement section, PIS 3 is a sectional view of the lifting drive section, Fig. 4 is a flowchart of liquid level control, and Fig. 5 is the lifting drive section. Figure 56 is a sectional view showing the 70-ting basic structure. 1... Reference manometer, 2... Displacement manometer, 4
... Water injection valve, 5 ... Drain valve, 7, 8, 9a, 9h.
...Sensor, 10...Controller, 20...70
-Ting foundation, 22... Hydraulic jack, 23...
Solenoid switching valve, 30...4M structure 31...foundation beam.

Claims (1)

[Claims] 1. A large number of elevating and lowering drive means for supporting a structure with respect to a floating foundation are provided, a means for measuring the level of the structure at each of these supporting parts is provided, and a preset detection level of the detection level is provided. A level correction device for a structure, comprising means for detecting a relative displacement from a reference plane, and a control means for driving each of the elevating and lowering drive means to expand and contract so that the relative displacement becomes approximately zero. 2. A reference manometer that detects the liquid level at the reference position of the structure, and a displacement manometer that is attached to each jack support part of the structure and detects a predetermined liquid level,
A control means for injecting water so that the liquid level of the reference manometer is kept constant is provided in the pipeline connected by the communication pipe, and a jack at the location where the displacement manometer is installed is driven to expand and contract in accordance with the output of the displacement manometer. The structure level correction device according to claim 1, characterized in that: