JPH0850019A - Method and apparatus for measuring sinkage of structure - Google Patents

Abstract

PURPOSE:To provide a method and an apparatus for measuring a rise or sinkage of a structure, etc., in real time. CONSTITUTION:A sinkage-sensing part 1 consisting of a transmission container 2 holding a constant water level is set at a required measuring point of a structure, etc. A sinkage-detecting part 4 consisting of a receiver container 3 connected to the transmission container 2 of the sinkage-sensing part 1 is set approximately at the same level as the sinkage-sensing part 1 at an immobile point sufficiently far from the measuring point and not influenced by a sinkage of the structure, etc. A necessary amount of water is filled in a system. The presence/absence of a sinkage and an amount of the sinkage are detected by measuring the water level in the receiver container 3 of the sinkage-detecting part 4. The sinkage-sensing part 1 can be buried in the ground easily, not obstructing a train or a vehicle in running. The measurement can be carried out directly at a measuring position. Since the sinkage-detecting part, 4 equipped with a sensor, etc., is set outside influences of the sinkage, a maintenance work for the apparatus can be conducted without entering a road or a track.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally refers to ups and downs of structures such as iron road floors and road floors, or ups and downs of natural ground that is not a structure (vertical displacement, hereinafter referred to as "sink"). ) In real time, and a subsidence measuring device.

[0002]

2. Description of the Related Art Conventionally, when conducting underground road excavation work under an iron road floor or a road floor currently in use, sinking measurement is indispensable in order to confirm the safety of service. It is difficult to see the vertical displacement of the track embankment uniformly by optical survey, and it is difficult to obtain the measurement accuracy due to train vibration. In addition, it is generally difficult to set a point that is considered to be a virtual fixed point, and it is often inconvenient to measure subsidence. It is said that even in well-conditioned areas, it is only effective in determining the deformation of subsidence or upheaval. In particular, safety management for railway-related business routes is very important, but the definitive measurement method is not established yet.

As a method for measuring the vertical displacement of the track, a water-filling type measuring method, which will be described in detail later, is used in addition to the optical method. However, in practice, there are various difficulties in mounting conditions and maintenance and inspection. There is not always the purpose. FIG. 8 shows a principle diagram of a water tube type relative subsidence meter which is generally used conventionally. It is composed of a reference tank a, a sinking cylinder b, and a communication pipe c connecting them. The reference tank a is at a position facing the sinking cylinder b, and the vertical displacement of the sinking cylinder b with respect to the reference tank a is equal to the relative displacement of the sinking cylinder b and the float. Therefore, telemetry is performed by electrically converting the relative displacement between the sinking cylinder b and the float as described later. Built-in differential transformer without mechanical contact,
An electric output is generated without absorbing the rest energy (positional energy) of the float.

FIG. 9 shows the detailed structure of the reference tank a, and FIG. 10 shows the detailed structure of the sinking cylinder b. If the reference tank a is installed at a fixed point, the absolute displacement of the sinking cylinder b can be detected.
The fixed point does not necessarily have to be fixed, but is generally set at the base point of relative displacement (virtual fixed point). The reference tank a must always maintain a constant liquid level, and if the water is simply stored, the liquid level will naturally drop due to evaporation. Therefore, the auxiliary tank is dipped (drop feed) at regular time intervals. Drop a water drop from d. Therefore, a small amount of overflow always occurs from the reference tank a. This overflow is collected in the recovery tank e, and when it reaches a certain amount of water, it is sent to the auxiliary tank d by the pump P. The decrease due to evaporation is periodically replenished by pouring water into the recovery tank e. Thus, the water surface of the reference tank a is kept constant.

The subsidence cylinder b is installed at a measurement required location and reacts to subsidence or bulging. When the sinking cylinder b moves up and down, the internal water surface maintains a constant height due to the effect of communication with the reference tank a, so that the apparent height of the water column seen from the sinking cylinder b changes. In the example shown in FIG. 10, the change in energy at this minute position is automatically tracked by the servo mechanism by the servo motor m using the photoelectric effect of the phototransistor f to detect the upper and lower light-shielding ranges. The amount moved by this tracking mechanism is converted into an electric amount and taken out. Since the tracking mechanism is driven by the servomotor m, its rotation angle may be linked with a rotary potentiometer, but in the example of FIG. 10, the vertical movement of the tracking mechanism is detected by the differential transformer g. There is. The height of the water column may be pressure-converted and detected by a highly sensitive water pressure gauge. The optical type has a feature that it does not have a movable friction part, but the bellows with low mechanical impedance (resistive force) is used as the sensitive part, so the characteristics are inferior due to temperature changes. In addition, the change in the water column is reduced to a few percent and the bellows expands and contracts.
With a decrease in ratio. For the purpose of remedying such a defect, a differential pressure gauge sensitive to changes in slight pressure may be used as a transducer. Since the measurement-required place where the sinking cylinder b is installed is a region that is easily affected by temperature changes, it is necessary to cover it with a heat insulation protection case so as not to receive direct sunlight at least.

[0006] In addition, FIG. 11 shows a squat gauge for orbit.
A measuring device whose concept is shown in is also known. Density is 1 of water
The vertical displacement is calculated by applying a back pressure in the sinking cylinder using mercury that reaches a little more than three times as a medium, and detecting the equilibrium pressure that always keeps the water column of the manometer constant. The height of the mercury surface where the manometer's indication is the same is detected by a stylus-type conductive circuit, but it has not been used in Japan at all.

[0007]

In the case of the water pipe type relative subsidence meter shown in FIG. 8, the subsidence tube b installed at a required measurement location.
Since it is configured as an advanced precision machine as shown in Fig. 10, it is buried in the underground such as iron road floors and road floors where it is burned by flame heat in summer and freezes in winter. It is not suitable for use. For example, since the applicable temperature range of the differential transformer g is about 0 ° C. to 40 ° C., it is impossible to expect the measurement accuracy throughout the year, and the useful life will be exhausted soon. In addition, by using the photoelectric effect of the phototransistor f, a slight change in water level in the sinking cylinder b
Furthermore, it is a configuration that automatically tracks the shaded area with a servo mechanism, but since iron road floors and road floors vibrate violently every time a train or an automobile passes, not only precision equipments such as these are not very useful in such places, but also mechanical ones. Trouble is likely to occur. There is also a problem that the iron road floor in service and the sinking cylinder b buried in the road floor do not remain even if the need for repair or inspection for a failure arises. Further, since the power supply and the signal cable are pulled out from the sinking cylinder b buried in the measurement-required place and the equipment at the monitoring place is arranged and connected, there is a high possibility that the signal cable will be damaged during the work for correcting the track, and the vicinity There is a high possibility that noise will be generated by picking up an electrically induced voltage from a high voltage line or the like.

Therefore, conventionally, when detecting the behavior of the train track, the sinking cylinder b is often installed and used outside the train construction limit. With this method, the sinking arm vibrates due to the protruding arm. Is further amplified, and the sensors such as the phototransistor f and the differential transformer g incorporated in the sinking cylinder b are likely to be damaged or lost due to train vibration or electric induction. However, since instrument replacement and maintenance are very difficult, it is common to not set the sinking cylinder b in the track. As a result, even if the behavior of the train track (subsidence and uplift) is detected, the detector is not installed directly below the track, so the calculation method is used, and the calculated value is indirect. The reality is that the exact vertical displacement cannot be grasped and confirmed.

Even in the case of one of the reference tanks a, the auxiliary tank d is formed at regular time intervals by the drip technique having the configuration shown in FIG.
It has a fairly complicated structure because it keeps a constant water level by dropping water droplets from it. In particular, there is a serious problem that the measurement is not worthwhile until the wave (vibration) state of the water surface accompanying the drop of the water drop is calmed down and the measurement is not worth it.

Therefore, an object of the present invention is to reverse the concept of the above-mentioned water pipe type relative subsidence meter to a positive one, and to simply measure a water level (a transmission container) that holds a certain level of water level at a measurement required portion such as a structure. ) Is installed, and at the fixed point outside the settlement effect (virtual fixed point) sufficiently far outside the measurement-required point (building limit of the train track), the transmitting container of the settlement sensitive section (EN) A subsidence measuring method and apparatus configured to measure a water level of a receiving container by installing a subsidence receiving unit including a receiving container and a water level measuring means of the receiving container in communication with the receiving container.

The ultimate object of the present invention is that the subsidence-sensing portion having a structure equivalent to that of a simple water container is suitable for being buried in an iron road floor or soil of a road floor under severe weather and vibration conditions. The subsidence receiving unit that measures the vertical displacement of the subsidence sensing unit is installed at a fixed point outside the influence of subsidence, so that the water level measuring means, which is a precision instrument, is not affected by vibration or weather conditions at all, and therefore the mechanical There is little risk of failure, maintenance can be done easily, there is no concern about disconnection of cable wiring due to track repair work, etc., and when the measurement range is scaled over, it is possible to easily re-seat in a safe place. An object of the present invention is to provide a subsidence measuring method and device having a configuration capable of accurately performing subsidence measurement in real time.

[0012]

[Means for Solving the Problems] As a means for solving the above-mentioned conventional problems, the sinking measuring method for a structure or the like described in claim 1 has a transmitting container 2 for holding a water level at a constant level.
The subsidence-sensing part 1 consisting of is installed in a measurement-requiring place such as a structure, and the reception is communicated with the transmitting container 2 of the subsidence-sensing part at a fixed point outside the subsidence influence sufficiently far from the measurement-requiring place. The subsidence receiving part 4 consisting of the container 3 is installed at almost the same level as the subsidence sensing part 1, the system is filled with a required amount of water, and the water level in the receiving container of the subsidence receiving part is measured to measure It is characterized by measuring the presence or absence of subsidence and the amount of subsidence.

In the above settlement measurement method, the sending container 2 of the settlement sensing unit 1 is always supplied with an amount of water slightly larger than the amount of leaked water, and the water level in the sending container 2 is an overflow portion having a predetermined height. It is characterized by maintaining a constant level by 7. The water level in the receiving container 3 of the sinking receiving unit 4 is also characterized in that it is constantly measured in real time by a differential transformer 6 using a float 5.

Next, the subsidence measuring apparatus for a structure or the like according to claim 4 is a subsidence sensing unit 1 installed at a measurement required portion of a structure or the like, and a subsidence sufficiently distant from the measurement required portion. The subsidence receiving section 4 is installed at a fixed point outside the influence, and the subsidence sensing section 1 is mainly composed of a transmission container 2 having a substantially sealed structure, and the transmission container 2 is an overflow that maintains a constant water level. The bottom of the receiving container 4 has a portion 7 and a communication pipe 8 is connected to the bottom. The sinking receiving part 4 is mainly composed of a receiving container 3 installed at substantially the same level as the transmitting container 2. Communication pipe 8 that is piped from the transmission container 2 at the bottom
Is connected to the receiving container 3, and means for measuring the water level in the receiving container 3 is provided. In the transmitting container 2 and the receiving container 3, up to the water level defined as the height of the overflow portion 7 of the transmitting container 2. Each is characterized by being filled with water.

In the transmitting container 2 of the subsidence sensing unit 1 of the subsidence measuring device described above, the water receiving unit 1 is partitioned by a water-permeable porous plate 9.
0 is attached, and the water supply pipe 13 of the water supply pump 12 for pumping up the water in the secondary water tank 11 is piped to the water receiving section 10.
A feature is that the water supply pump 12 that is continuously operated constantly supplies the water receiving unit 10 with an amount of water that slightly exceeds the amount of leaked water.

In the receiving container 3 of the sinking receiving section 4, as a means for measuring the water level, a vertical shaft 5a of a float 5 floated on the water surface is fixed vertically above the water surface and a differential transformer 6 is movable. It is characterized in that it is connected to the shaft 6a, and a change in the water level in the receiving container 3 is constantly measured as an electric quantity by the differential transformer 6 and is input to a calculation and display device.

A level sensor 14 for automatically detecting the water level in the secondary water tank 11 is installed in the secondary water tank 11, and a replenishment pump 15 that is automatically operated according to the detection value of the level sensor removes the water in the primary water tank 16. A makeup water pipe 17 extending from the pump for pumping up and replenishing is piped to the secondary water tank 11, and conversely, a return water pipe 19 extending from a return pump 18 for pumping the water in the secondary water tank 11 is piped to the primary water tank 16. It is characterized by being.

An opening / closing valve 20 is installed at a lower portion of the communication pipe 8 to pump water for pumping water in a primary or secondary water tank.
It is also characterized in that the water exchange pipe 22 extending from 1 is connected to the communication pipe 8.

[0019]

In the invention of claim 1 or 4, the water level of the transmitting container 2 and the receiving container 3 which are communicated with each other is kept the same.
When vertical subsidence or subsidence (vertical displacement) occurs in the subsidence sensing unit 1 (transmission container 2) installed in a measurement-required location such as a structure, the absolute water level in the transmission container 2 rises or falls, and this water level The change immediately manifests itself as a rise or fall in the water level in the receiving container 3. Therefore, by measuring the water level in the receiving container 3 installed at the fixed point or the virtual fixed point, the vertical displacement of the structure or the like in which the subsidence sensing unit 1 is installed (presence or absence of subsidence or bump or the size of subsidence) In short, it is possible to measure the deformation of railway road floors.

Only the transmitting container 2 containing a certain level of water is installed at the measurement-required point, and the leakage amount of water caused by evaporation of water, vibration generated at the measurement-required point, vertical displacement, etc. is slightly exceeded. A large amount of water is constantly supplied by the water supply pump 12, excess water is discharged from the overflow section 7, and the water level in the transmission container 2 is constantly maintained at a constant level (that is, the height of the overflow section 7). , Highly reliable measurement can be performed. Particularly, the transmission container 2 and the reception container 3 have sufficiently wide liquid surface openings (capacity), and the water supply to the transmission container 2 is divided by the water-permeable porous plate 9 into the water receiving portion 10.
The subsidence measurement can be performed accurately in real time at all times because it is performed slowly and quietly so as not to make too much vibration on the water surface of the transmission container 2.

By inputting an electric signal (measurement signal) measured by the differential transformer 6 to a calculation display device such as a personal computer, it is possible to easily carry out measurement management (visual observation, recording) of a deformation of a structure or the like. . There is no need to run electric cords etc. from the subsidence sensing unit 1 installed at the required measurement points,
On the other hand, the subsidence receiver 4 and other devices outside the subsidence influence can be sufficiently protected and maintained.

Replenishment of water between the primary water tank 16 and the secondary water tank 11 is automatically performed by the replenishing pump 15.
Water that has been used for a considerably long time and has a large amount of dirt bubbles can be replaced by the function of the return pump 18. Further, when the water in the communication pipe 8, the transmitting container 2 and the receiving container 3 becomes old, the on-off valve 20 is opened and the water is discharged.
By the action of, new water can be supplied and direct exchange can be performed.

[0023]

EXAMPLE An example of the present invention shown in the drawings will be described below. FIG. 1 is a conceptual diagram of the entire subsidence measuring apparatus for structures and the like according to the present invention, and FIGS. 2 and 3 show a general case where the subsidence measuring apparatus is installed with a roadbed in a railroad track as a measurement-required point. A schematic layout is shown. The subsidence sensing unit 1 is directly embedded in the horizontal position on the concrete base 30 constructed at a certain depth position in the soil directly below each track within the train construction limit and at a certain depth in the soil. It In the case of FIG. 2, the secondary water tank 11 is installed at an appropriate place outside the track bed, and is connected to each subsidence sensing unit 1 by a protective pipe 31 including a communication pipe and other pipes. The subsidence receiving unit 4 is a fixed point (or a virtual fixed point) outside the subsidence influence (outside the construction influence range), which is sufficiently far away from the measurement-needed portion, via the secondary water tank 11.
Further, as shown in FIG. 1, the transmitter container 2 and the receiver container 3 are installed at substantially the same level, and both are connected by a communication pipe 8. However, since a plurality of subsidence sensing units 1 ... Are installed for each measurement point at the measurement-required points, the same number of subsidence receiving units 4 are installed.
Is installed, and the corresponding transmitting container 2 and receiving container 3 are communicated with each other by a communication pipe 8.

The details of the subsidence sensing portion are shown in FIGS.
This is vertical x horizontal x height is 350 x 125 x as an example
It is a box-shaped container having a closed structure having a rectangular parallelepiped shape with a size of about 240 mm. The lower half of the box is formed in the cavity portion 23 communicating with the protection pipe 31, and the pipe space 2 is provided at one end of the upper half.
A water container is formed leaving 5 and is covered with a lid 24.
The water container is divided into three chambers by two vertically permeable water-permeable perforated plates 9 and 9 located near the central part (however, it may be one or two or more). The chamber at the left end in FIG. 5 is formed in the transmitting container 2, and the chamber at the right end is the water receiving portion 10.
The discharge opening of the water supply pipe 13 is connected to the upper part of the water receiving portion 10. The water supplied to the water receiving section 10 through the water supply pipe 13 passes through the water passage holes of the two perforated plates 9 and 9 and is sufficiently squeezed while slowly and quietly having the same effect as that of a kind of gouge dam. Since the water is supplied to the transmitting container 2 in such a state as it is, the water surface in the transmitting container 2 does not generate a wavy vibration. In the transmitting container 2, an overflow cylinder 7 having a diameter of 45 mm and a height of 68 mm is vertically installed from the bottom of the container so as to rise vertically. The water falls into the portion 23, and the water level at the effective height of the overflow cylinder 7 is exactly maintained. The fact that the vertical × horizontal dimension of the water surface opening in the transmitting container 2 is as large as 120 × 97 mm also helps to prevent vibration. The overflow water of the overflow cylinder 7 returns from the cavity 23 through the protection pipe 31 to the secondary water tank 11 described above. Therefore, the secondary water tank 11 is also referred to as a return water tank. A communication pipe 8 is connected to an opening 8a formed on the bottom surface of the transmission container 2. The communication pipe 8 is piped from the hollow portion 23 through the protection pipe 31 to the sinking receiving portion 4 as shown in FIG. Further, the water supply pipe 13 is also piped from the hollow portion 23 to the secondary water tank 11 through the protection pipe 31.

As shown in FIG. 1, the secondary water tank 11 is provided in parallel with the main primary water tank 16. Secondary water tank 11
The above-mentioned water supply pipe 13 is connected to the water supply pump 12 installed therein, and the water in the secondary water tank 11 is pumped up by the water supply pump 12 which is continuously operated at all times.
A constant amount of water (usually about 600 cc per minute) slightly exceeding the amount of leaked water that is lost due to vertical displacement or vibration of the subsidence sensing unit 1 is constantly supplied to the water receiving unit 10. Thus, the water in the secondary water tank 11 is circulated between the subsidence sensing unit 1. The water level in the secondary water tank 11 that gradually decreases with the passage of time is the electrode type level sensor 14 installed in the same water tank.
Is constantly monitored by. A replenishment pump 15 that is automatically controlled based on the detection signal of the level sensor 14 is installed in the primary water tank 16, and a makeup water pipe 17 extending from the replenishment pump 15 is piped to the secondary water tank 11. That is, when the level sensor 14 detects that the amount of water in the secondary water tank 11 has dropped to the shortage limit point, the replenishment pump 15 is automatically operated and the water in the primary water tank 16 is supplied to the secondary water tank 11 in a predetermined manner. The water is supplied to the water level and self-held so as not to hinder the circulation of water by the water supply pump 12. Conversely, the return pump 18 is installed in the secondary water tank 11,
A return water pipe 19 extending from the return pump 18 is piped to the primary water tank 16. When the water in the secondary water tank 11 becomes dirty or decomposes due to long-term use and the number of bubbles contained in the water increases (or increases), the responsiveness to the liquid level equilibrium between two communicating points decreases significantly, Even if the height of the water column is different, the accuracy and reliability of measurement are reduced. In order to deal with such a situation, the return pump 18 is driven at intervals of about several months to return the water in the secondary water tank 11 and replace it with new water. This return pump 18 is also used to return water to the main primary water tank 16 when the water level in the secondary water tank 11 exceeds the rising limit.

Next, FIG. 7 shows the details of the squat receiving unit 4 installed at a fixed point outside the influence of the squat. This is mainly composed of a casing 34 which is fixed and supported on a fixed point support body 32 in a vertical posture via upper and lower brackets 33, 33. The bottom half of the casing has a diameter of 76 mm and a height of 190 mm
And the communication pipe 8 that has been piped from the above-described transmission container 2 is connected to the lower bottom portion thereof. Therefore, the receiving container 3 contains water to an absolute water level equal to the water level in the transmitting container 2. Within the receiving container 3, the reference water level is set as the zero point and ±
Water having a depth that can measure the range of 15 to 25 mm is stored, and the float 5 for measuring the water level is floated on the water surface. The vertical shaft 5a of the float 5 is a movable shaft 6 of a differential transformer 6 which is fixed and supported in a vertical direction by a clamp 35 at an upper half portion of the casing which is located above the water surface.
It is configured to be connected in series with “a” so that even a slight change in the water level in the receiving container 3 is constantly measured as an amount of electricity by the differential transformer 6. The measured value of the differential transformer 6 is input to a well-known calculation display device (not shown) (for example, a personal computer), and the measured value is visually displayed or recorded.

In consideration of the case where the water in the transmitting container 2, the receiving container 3 and the communicating pipe 8 becomes dirty or rots due to long-term use and becomes inconvenient, as shown in FIG. A three-way on-off valve 20 is provided in the section, and a water exchange pipe 22 extending from a water exchange pump 21 installed in the primary water tank 16 is connected to one port of the three-way on-off valve 20. An air bleeding tank 36 is connected to the other one port. That is, when it is necessary to replace the water in the communication pipe 8 or the like, the opening / closing valve 20 is first opened to discharge the old water through the air bleeding tank 36. After that, the on-off valve 20 is switched and the water exchange pump 21 is operated to directly fill the system of the communication pipe 8 with new water.

[0028]

EFFECTS OF THE INVENTION The method and apparatus for measuring subsidence of structures according to the present invention have the following effects. (1) Since the subsidence of the subsidence sensitive area can be easily performed underground, it is suitable for measuring subsidence of structures such as railway road floors and road floors, and does not disturb the operation of trains or running of cars. (2) The subsidence sensing unit is suitable for being directly buried in the soil of the road or track where the structure needs to be measured, so the required measurement position can be directly measured. (3) Even if the measurement-required location is a track with heavy traffic or train operation, the subsidence sensing section is maintenance-free, while the subsidence receiving section equipped with sensors is installed outside the subsidence impact. Therefore, maintenance can be done without entering the road or track. (4) When the measurement range is scaled over, the refilling can be easily done outside the settlement effect (outside the orbit). (5) There is no concern about accidents where the cable wiring of the instrument is cut even if the measurement-required points are subjected to human activities such as trajectory correction. (6) The measurement required point is high
Even in places (environments) where the temperature is low and the temperature changes drastically, accurate measurements can be made throughout the four seasons. (7) Even if the required measurement point is directly under the train track, the measurement can be performed with almost no adverse effects due to vibration. (8) The degree of freedom of the subsidence sensing part, that is, the direction of the vertical displacement of the structure, is clear, installation work is easy, and measurement accuracy is easy to obtain. (9) Settling measurement can be performed in real time at all times. (10) Since the water is constantly supplied to the transmitting container by the water supply pump, the reference water surface in the transmitting container can always be kept reasonably and reliably, and the measurement accuracy can be maintained for a long time.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of an entire squat measurement device according to the present invention.

FIG. 2 is a layout drawing when installed in a railway track.

FIG. 3 is a layout drawing when installed in a railway track.

FIG. 4 is a plan view with the lid of the sinking sensing unit removed.

FIG. 5 is a vertical sectional view of a subsidence sensing unit.

6 is a sectional view taken along line 6-6 of FIG.

FIG. 7 is a cross-sectional view of a squat receiving unit.

FIG. 8 is a principle diagram of a conventional water tube type relative subsidence meter.

FIG. 9 is a configuration diagram of a reference tank.

FIG. 10 is a detailed view of the sinking cylinder.

FIG. 11 is a conceptual diagram of an orbital squat gauge.

[Explanation of symbols]

 2 Sending container 1 Subsidence sensing part 3 Receiving container 4 Subsidence sensing part 7 Overflow part 5 Float 6 Differential transformer 8 Communication pipe 9 Perforated plate 10 Water receiving part 11 Secondary water tank 12 Water supply pump 13 Water supply pipe 5a Vertical axis 6a Movable shaft 14 Level sensor 15 Reinforcement pump 16 Primary water tank 17 Make-up water pipe 18 Return pump 19 Return water pipe 20 Open / close valve 21 Water exchange pump 22 Water exchange pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hidenao Ueki 1-5-1-401 Nishiwaki, Tarumi-ku, Kobe-shi, Hyogo Prefecture (72) Inventor Yoshiyuki Kono 137-22 Nikka, Tatsuno-cho, Tatsuno-shi, Hyogo (72) Invention Mitsuo Mori 2-8-206 Matsuyama-cho, Nishinomiya-shi, Hyogo Prefecture (72) Inventor Toshio Kishimoto 35 Takenohana 4-chome-cho Yamanashi-ku, Kyoto C-108 (72) Yutaka Emi 4-1-1 Honmachi, Chuo-ku, Osaka No. Stock company Takenaka Civil Engineering (72) Inventor Hiroshi Otsubo 4-1-1 Honmachi, Chuo-ku, Osaka City Stock company Takenaka Civil Engineering (72) Inventor Tanaka Idai 50-2 Higashiyamadai, Nishinomiya-shi, Hyogo −216−102 (72) Inventor Atsunori Kato 1-38 Yaogi, Yao City, Osaka Prefecture (72) Inventor Market Satoru 38, 72, 94, Mizusashi, Noguchi Town, Kakogawa City, Hyogo Prefecture Mitsugu Murakami East, Ibaraki Prefecture 1138 Akazawa, Katsura-mura, Ibaraki-gun (72) Inventor Pond Itsuo Osaka Prefecture Tondabayashi Fujisawadai 2-chome No. 2 239 No.

Claims (8)

[Claims] 1. A subsidence-sensing part, which is a transmission container that holds a certain level of water level, is installed at a measurement-required location such as a structure.
A subsidence receiving unit consisting of a receiving container in communication with the transmitting container of the subsidence sensing unit is installed at a fixed point outside the subsidence influence that is sufficiently far from the measurement-requiring point, at approximately the same level as the subsidence sensing unit. A subsidence measuring method for a structure or the like, characterized in that the presence or absence of subsidence and a subsidence amount at a measurement required location are measured by filling a required amount of water in the interior and measuring a water level in a receiving container of the subsidence receiving unit. 2. A constant amount of water slightly exceeding the leaked amount is constantly supplied to the transmitting container of the subsidence-sensing part according to claim 1, and the water level in the transmitting container is constant by an overflow part of a predetermined height. Each is characterized by maintaining a level,
Measuring method for settlement of structures. 3. A settlement measurement method for a structure or the like, characterized in that the water level in the receiving container of the settlement receiver according to claim 1 is constantly measured in real time by a differential transformer using a float. 4. A subsidence sensing unit installed at a measurement required location of a structure or the like, and a subsidence receiving unit provided at a fixed point outside the subsidence influence sufficiently distant from the measurement required location, The subsidence sensing unit is mainly composed of a substantially sealed transmission container, the transmission container has an overflow portion for maintaining a constant water level, and a communication pipe is connected to the bottom, the subsidence receiving unit is the A receiving container installed at almost the same level as the transmitting container is the main body, a communication pipe connected from the transmitting container is connected to the bottom of the receiving container, and means for measuring the water level in the receiving container is provided. The submersion measuring device for a structure or the like is characterized in that the transmitting container and the receiving container are filled with water up to the water level defined as the height of the overflow portion of the transmitting container. 5. A water supply pipe of a water supply pump for pumping water from a secondary water tank, wherein the transmitting container of the subsidence sensing unit according to claim 4 is provided with a water receiving unit partitioned by a water-permeable porous plate. Is piped to the water receiving portion, and a continuous supply water pump constantly supplies an amount of water slightly exceeding the leakage amount to the water receiving portion. 6. A differential transformer in which a vertical axis of a float floated on the water surface is vertically fixed above the water surface in the receiving container of the subsidence receiving unit according to claim 4, as means for measuring the water level. A sinking measuring device for a structure or the like, which is connected to the movable shaft of, and in which a change in water level in the receiving container is constantly measured as an electric quantity by a differential transformer and is input to a calculation and display device. 7. The secondary water tank according to claim 5 is provided with a level sensor for automatically detecting the water level in the water tank,
A replenishment pump that is automatically operated according to the detection value of the level sensor pumps up water from the primary water tank, and a replenishment water pipe extending from the replenishment pump is piped to the secondary water tank, and conversely in the secondary water tank. A subsidence measuring device for a structure or the like, characterized in that a return water pipe extending from a return pump for pumping water is piped to the primary water tank. 8. An opening / closing valve is installed at a lower portion of the communication pipe according to claim 4, and a water exchange pipe extending from a water exchange pump for pumping up water in the primary or secondary water tank is connected to the communication pipe. A subsidence measuring device featuring structures.