JPS6012564B2 - Tank foundation settlement measuring device - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a tank foundation settlement measuring device for measuring and monitoring uneven settling of tank foundations such as oil tanks using a liquid level gauge. , a subsidence meter is placed in the foundation, and the subsidence measuring tube is used to measure the measurement position through a transfer pipe, and the subsidence meter is connected to a constant water level chamber by a partition wall having a V-shaped notch. and a return chamber, and an air chamber is formed in the upper part, and the constant water level chamber and the subsidence measuring tube are respectively passed through conduits to form a water system for measurement, and the air chamber Another conduit connected to the air has an end connected to the atmosphere to form an air venting system, and in addition to this, the return chamber and a water level confirmation pipe connected to the return chamber via another conduit form a monitoring system. Further, the water level confirmation pipe is installed sideways to the subsidence measuring pipe, and the upper entrance end of the erected pipe is formed slightly lower by a predetermined amount than the lowest part of the V-shaped partition wall. This invention relates to a tank foundation settlement measuring device whose measurement function works reliably.

BACKGROUND OF THE INVENTION In recent years, due to increased fuel consumption and the rise of the chemical industry, a large number of oil tanks and refining tanks have been constructed in industrial complexes.

However, as the tank becomes larger, data on the behavior of the foundation has not been sufficiently accumulated and studied, and as a result, there are cases where the foundation sinks unevenly due to unpredictable factors, and in some cases, There is dust that can lead to extremely serious accidents such as spills due to tank rupture, etc.

Problems to be Solved by the Invention Therefore, in order to deal with this problem, it is necessary to periodically measure and monitor the state of foundation settlement. The problem was that measurement required time and skill.

To deal with this, there is a device using electrical control as shown in Tokkokuki Sho 51-Satoshi No. 059, but this has the disadvantage that the device is complicated and expensive.

In addition, there is a pipe-opening system device disclosed in Japanese Utility Model Application Publication No. 50-116448, but although there is a measuring water system and an air venting system and a monitoring system for removing air from the measuring water system, the function of the "measuring water" is limited. The monitor system that ensures the reliable operation of the tank foundation has the disadvantage that it is difficult to confirm the measurements at the same time because the locations of the drain port and the measurement pipe are different.The purpose of this invention is to improve the tank foundation settlement measurement and monitoring system based on the above-mentioned conventional technology. The problem was set as a technical topic to be solved, and a measuring device for liquid level measurement was buried in the foundation when constructing the tank foundation to ensure the flow of the measured water, and also to make it easy to measure and monitor. It is an object of the present invention to provide a tank foundation settlement measurement device that can accurately measure the settlement of tank foundations and is useful in the field of tank use in various industries.

Means/Function for Solving the Problems In order to solve the above-mentioned problems, the structure of the present invention, which is based on the above-mentioned claims, is to solve the above-mentioned problems. When the sand bed was finished, a sloped groove at a predetermined angle was created, and a sinkage meter and sloped conduit, which had been properly treated in advance to prevent compression deformation due to the tonosho, were passed through and buried in the sloped groove, and a sloped groove was formed. At the same time as backfilling, the end of the conduit is passed through the subsidence measurement pipe of the measurement facility, and after the tank is constructed, water is passed between the subsidence meter and the subsidence measurement pipe, and measurement water is supplied from the subsidence measurement pipe, and the conduit is Water is sent to the constant water level chamber of the subsidence gauge to fill the water system with measurement water, while the air in the water system is drained from the upper air chamber of the subsidence gauge through another conduit through an air vent system of an air vent pipe. carried out,
The measurement water overflowing from the constant water level chamber of the subsidence meter through the V-shaped notch in the partition wall is smaller than the V-shaped notch in the water level confirmation pipe that is passed through another conduit forming the monitor system. By exiting from the closed end located on the side of the settling measuring pipe in the measuring facility for a low settling measuring pipe, it is possible to immediately and easily monitor the reliable filling of the measuring water system while measuring. There is a meniscus at the upper end of the return water at the end of the checkpoint, which makes it possible to recognize that the water to be measured is maintained in a full state, and the liquid flow method makes it possible to measure the absolute amount of subsidence and also the relative amount of subsidence at the site of the subsidence meter. This was achieved by taking technical measures to

Embodiment - Configuration Next, an embodiment of the present invention will be described below based on the drawings.

It is a sealed subsidence gauge in the form of a river box, and its interior is divided into left and right constant water level chambers, 3L, and return chambers 4 by a V-shaped weir-shaped top at a predetermined height. A common air chamber 5 is formed.

In addition, on the front wall of the sinkage meter 1, a water inlet 6 for communication is connected to the constant water level chamber 3.
In addition, monitor water inlets 7 are arranged in parallel to the return chamber 4, and above them, air vents 8 are closed to the air chamber 5 and connected to nipples. It is a sinking measurement tube made of a transparent tube such as glass, and is erected with a measurement gauge scale 18 attached.
Further, 11 is a water level confirmation pipe, which is installed upright next to the subsidence measurement pipe 9 by means of a measurement frame 16 in the housing 18 of the measurement facility, which is located a set distance away from the tank installation position. This is an air vent pipe, and the ranking has been discussed with officials of subsidence measurement pipe 9 and water level confirmation pipe 8 in L discussion A Uzing vine 8.

Therefore, these subsidence measurement pipe 9, water level confirmation pipe 11 to air vent pipe 12 are made of vinyl pipes etc., respectively.
The communication water inlet 6, the monitor water inlet 7,
Each nipple of the air vent 8 is followed by one.

The constant water level chamber 3, the conduit 13, and the subsidence measurement tube 9 are connected to each other to form a measuring water system, and the return chamber 4, the other conduit 14, and the water level confirmation tube 11 form a monitoring system. This allows the measurement function to work properly.

Further, the air chamber 5 and another conduit 5 and the air vent pipe 12 form an air vent line, and function to maintain reliable operation of the water system.

Therefore, the subsidence meter, the subsidence measurement pipe 9, the water level confirmation pipe, and the air vent pipe 12 are connected via a three-bundle pipe S, and are made into one unit. As illustrated in the figure, a plurality of units for predetermined measurements are arranged.

On the other hand, in the tank construction area, foundation work is being carried out, and after sand bed G7 is completed, sinkage gauge 1, conduit 13, turtle 4, turtle 5 are installed at the lower part of the tank installation location to set depths, as shown in Figure 5. A sloping trench with a gentle slope is dug in which the tank will be buried, and then a housing 18 as a measurement facility is constructed at a predetermined distance from the tank construction location.

Therefore, a subsidence measurement pipe 9, a water level confirmation pipe 11, an air vent pipe 12
, and each conduit 13, 14, 15, and the subsidence meter 1 are supplied with water from the subsidence measurement pipe 9 side, etc., and the conduit 13
, 14, and 15 are struck to vibrate to expel air bubbles and fill them, and then set them in each groove as shown in FIG. etc., and then the tank 19 is constructed in the specified location.

In the above-mentioned set state, the level of the subsidence meter 1 is installed near the upper limit of the scale 10 of the measurement gauge of the subsidence measuring tube 9, and the upper end of the water level confirmation tube 11 is located near the partition wall 2 of the subsidence meter.
From the lowest point of the V-shaped notch, as shown in Figures 1 and 3,
Keep the setting amount slightly low.

Once such preparations have been completed, tank 19 will be installed as described above.
construction.

Therefore, for measurements after the tank 19 enters the operating state, if water is supplied from the sinkage measurement tube 9 side, the water flows through the conduit 13.
It conducts while filling the water and enters the constant water level chamber 3 of the subsidence gauge 1.

When water enters the constant water level chamber 3 and rises, the V-shaped leveling wall 2
Water sensitively overflows from the weir and enters the return chamber 4, passes from the monitor water inlet 7 through the conduit 14, and reaches the water level confirmation pipe 1.
1, the water flows to the water level confirmation pipe 11 using an oblique gradient. Therefore, the opening □ level of the water level confirmation pipe 11 is determined by the V of the working wall 2 of the subsidence gauge 1, as described above and shown in Figures 1 and 3.
Because the setting amount is slightly lower than the notch level of the mold,
Water overflows from the checkpoint as shown in the figure, and the flow of water in the measurement water system is confirmed as a monitor system right next to the subsidence measurement pipe 9.

Meanwhile, since the conduit 14 is slanted toward the water level confirmation pipe 11, air bubbles in the conduit 14 rise up and flow toward the Rentsu air chamber 5 of the subsidence meter 1, and accumulate. is appropriately discharged from the air vent pipe 12 through the air vent port 8 through the conduit 15, and the air vent system is activated.

As mentioned above, as water overflows from the entrance of the water level confirmation pipe 11, each water level at the weir of the V-shaped partition wall 2 of the subsidence measuring pipe 9 and the subsidence meter 1 is determined as shown in Figures 1, 2, and 3. As shown in , it is confirmed on the monitor that the same level has been reached as described above, and in this state, the water surface level in each subsidence measurement tube 9 of each subsidence meter 1 at each part is measured by the gauge 10, and the water system is functioning. record the measured quantity and set the measurement frame 1.
6 level is measured from the fixed point 20, and the measurement is recorded.

In this case, since the water level confirmation pipe 11 is located in the housing 18 immediately adjacent to the subsidence measuring pipe 9, the overflow from the entrance and the water level measurement of the subsidence measuring pipe 9 can be simultaneously and reliably measured. By correcting the temporal fluctuation of the measurement frame 16 relative to the fixed point 20, it is possible to immediately determine the absolute settlement amount and relative movement settlement amount of each subsidence gauge 1 within the measurement housing 18. Incidentally, the timing of the measurement is determined appropriately. When the uneven settlement of the tank foundation 17 exceeds the permissible limit due to the measurement monitoring system, appropriate predetermined measures may be taken.

In addition, in the measurement housing 18, dust-proof caps are always fitted to the upper ends of the subsidence measurement tube 9, the water level confirmation tube 11, and the air vent tube 12 to prevent foreign matter from entering.

It goes without saying that the embodiments of the present invention are not limited to the above-mentioned embodiments, and the present invention can be used not only to measure the settlement of the tank foundation described above, but also to measure the ground surface settlement under pre-loading for ground improvement. Various aspects can be adopted, such as being highly effective in determining the effectiveness of ground improvement.

More than the effects of the invention, according to this invention, ``A device for measuring tank foundation settlement using a liquid level gauge has a working wall equipped with a V-shaped notch in which a constant water level chamber and a return chamber are formed. A plurality of subsidence gauges are buried at predetermined positions in the foundation of the tank, and the constant water level of the subsidence gauges is adjusted so that the fixed water level of the subsidence gauges is within the measurement level range of the liquid level of the subsidence measurement pipes placed in the measurement facility. By connecting the chamber and the sinkage measurement pipe with a conduit to form a measurement water system, the absolute amount of sinkage at the measurement site in the tank foundation and the relative amount of L sinkage can be accurately measured each time. Since records are also available, the state of subsidence of the tank foundation can be grasped in detail over time, and emergency measures can be taken appropriately based on the history of subsidence.

Therefore, the return chamber formed by the V-shaped partition wall of the subsidence gauge is connected via another conduit to a water level confirmation pipe installed on the side immediately adjacent to the subsidence measuring pipe inside the same housing etc. By forming a monitor system, it is possible to visually check and monitor the water level of the notch of the V-shaped partition wall and the sinkage measuring tube at the same time as the water level of the sinking measuring tube so that it is always at the same level. ``Therefore, there is an excellent effect of ensuring that the above-mentioned water system works reliably and that the subsidence measurement functions immediately and accurately.

The measurer did not visually check the overflow from the water level confirmation pipe and the water level in the subsidence measurement pipe at different locations.
It has good effects on workability and efficiency.

In addition, the upper part of the subsidence gauge is used as an air chamber, and another conduit is passed through the air vent pipe to form an air vent system, so air accumulates in the subsidence gauge and the conduit, which has the effect of not interfering with the same level of the water system. be.

Furthermore, ``The measuring device is a simple unit whose basic form is a constant water level chamber of a sinkage meter, a sinking measurement tube, a return chamber and a water level confirmation tube, and an air chamber and an air vent tube connected by a conduit. It is easy to manufacture, and once the desired number of units are installed on the foundation, there is almost no need for maintenance and inspection, and the initial cost and running cost are extremely low.

Since the partition wall of the subsidence gauge is formed in a V-shape, the overflow operates more sensitively than in a horizontal weir, making it easier to check the water level confirmation pipe.

Furthermore, it also has the advantage of having secondary flexibility that allows it to be set when repairing the foundation in the event that an existing tank is found to be sloping or sinking.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. i is an explanatory diagram of the arrangement of a subsidence measuring pipe, a water level confirmation pipe, and an air vent pipe in the measurement housing, and Fig. 2 shows the arrangement of the subsidence measuring pipe, water level confirmation pipe, and air vent pipe buried in the tank foundation. A cross-sectional front explanatory diagram of the subsidence meter, Figures 3 and 4 are Figure 2m.
-m, an explanatory drawing corresponding to the W-W cross section, Fig. 5 is a plan view explaining the configuration of the measurement unit set in the foundation, Fig. 6 is an explanatory drawing of the tank foundation during temporary earth covering on the right half, and the left half is an explanatory diagram after water filling is completed, and Fig. 7 is an explanatory diagram of the measurement unit buried in the tank foundation. 19...tank, 17...foundation, 5...air chamber, 3
...Water tank (constant water level chamber) 1...Sinkage meter, 9...
Liquid level gauge (sinking measurement tube), 13... Conduit, 3, 13, 9...
...Water system, 15...Other conduits, 12...Closed end (air vent pipe) 5,15,12...Air vent system,
2...Partition wall, 4...Return room, 14...・8U conduit, 11...Water level confirmation pipe, 4, 14, 1
1...Monitor type. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. A subsidence gauge with an air chamber on the top and a water tank is installed in the foundation on which the tank is installed, and a liquid level gauge installed outside the foundation is installed, and the liquid level gauge and the water tank are connected by a conduit for measurement. Another conduit connected to the air chamber has an open end to the atmosphere outside the foundation to form an air vent system, and a drain pipe for a monitor system is provided for the sinkage meter. In the tank foundation settlement measuring device, the settlement meter has a constant water level chamber and a return chamber forming the water tank defined by a partition wall having a V-shaped notch at the upper edge at the lower part of the air chamber. The constant water level chamber is connected to the settlement measuring pipe through its water inlet via a conduit, and the return chamber is connected to the subsidence measuring pipe at the measurement facility through another conduit to the water inlet. The water level confirmation pipe is connected to a water level confirmation pipe that is erected, and the upper opening end of the water level confirmation pipe is provided at a slightly lower level than the V-shaped notch of the partition wall, forming a monitor system. Tank foundation settlement measuring device.