JP2005331242A - Settlement measuring method for road surfaces - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method with good maintainability and long-term stability to measure the amount of settlement of road surfaces or the like. <P>SOLUTION: A reference water bath 11 is buried under measuring points 102A and 102B on the surface 101 of a runway 100, and a settlement gage 12 is installed in a manhole 103 formed at a predetermined fixed position. The reference water bath 11 and the settlement gage 12 are connected with a connecting tube 13. The amount of settlement at the measuring points 102A and 102B can be measured by detecting changes in the level of the reference water surface of the reference water bath 11 with the settlement gage 12. Since the present invention is configured such that the reference water bath 11 with no moving parts and sensor parts is buried under the road surface and the settlement gage 12 with moving parts and sensor parts is installed at a fixed position, it can have good maintainability and long-term stability. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for measuring a subsidence amount of a road surface or the like by a water filling type.

  Conventionally, as a method of automatically measuring the amount of subsidence on various road surfaces, etc., a method of measuring using a measuring instrument such as a water-type subsidence meter or an automatic tracking total station prism on the roadbed is known. It is. In general, the conventional water sink type subsidence meter is configured to use several subsidence meters connected in parallel to one reference water tank, and a communication pipe for communicating a plurality of subsidence meters in common with the reference water tank. It is necessary to appropriately perform maintenance of the piping system installed at the measurement point on the road surface, for example, it is necessary to perform an air bleeding operation for appropriately extracting the air generated inside. On the other hand, in the case of a measurement method using an automatic tracking total station, it is only necessary to install a prism at a measurement point on the road surface, and no particular maintenance is required.

  By the way, if it is not possible to attach anything to the road surface for safety reasons, such as when the amount of subsidence on the airport runway surface is measured, it is necessary to embed measurement equipment under the road surface. . For this reason, a measuring method using an automatic tracking type total station cannot be adopted, and an embedded type measuring instrument must be adopted.

  However, if a water-filled settlement gauge is simply buried under the road surface, maintenance work will be conducted by digging out the buried equipment due to problems such as maintenance of the equipment such as venting of the communication pipe. However, for example, when measuring equipment is installed under the airport runway surface, it will not be possible to replace the measuring equipment after construction, so the necessary maintenance work will not be possible, and the detector will be adjusted directly after installation of the measuring equipment. There is a possibility that required measurement accuracy cannot be ensured.

  An object of the present invention is to provide a method for measuring the amount of subsidence on a road surface or the like that can realize long-term measurement stability and ease of maintenance.

  In order to solve the above problems, in the present invention, a reference water tank that does not require adjustment is installed in the measurement unit, and the amount of subsidence of the reference water tank is set in a manhole or the like provided at a fixed point away from the measurement point. Is detected as a sensor for detection, thereby improving stability and maintainability.

  According to the present invention, there is provided a method for measuring the amount of subsidence on a road surface or the like, wherein a reference water tank is embedded under a measurement point and a subsidence meter is disposed at a given fixed point, and the reference water tank and the subsidence meter are connected. Then, a method for measuring the amount of subsidence on the road surface or the like is proposed, wherein the amount of subsidence at the measurement point is measured by detecting a level change of the reference water level of the reference water tank with the subsidence meter. .

  According to the present invention, a reference water tank that does not have a movable part and a sensor part is embedded under the road surface of the measurement point, and a settlement meter that has a movable part and a sensor part is provided at a fixed point, so that the long-term measurement can be performed. Stability and ease of maintenance can be realized.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a system schematic diagram showing an embodiment of a road surface settlement amount measuring system according to the present invention. A road surface settlement amount measurement system 1 shown in FIG. 1 is a measurement system for measuring a road surface settlement amount of a road surface 101 of a runway 100 of a main installation. Here, two measurement points 102A and 102B on the road surface 101 are measured. It is configured to measure the amount of road surface settlement. In this embodiment, there are two measurement points, but any number of measurement points can be used.

  Here, 10 is a first measurement device for measuring the amount of road surface depression at the measurement point 102A, 20 is a second measurement device for measuring the amount of road surface depression at the measurement point 102B, and 30 is a water supply device. 2 shows a detailed configuration diagram of the road surface settlement amount measuring system 1 shown in FIG.

  Hereinafter, the road surface subsidence measuring system 1 will be described in detail with reference to FIGS. 1 and 2.

  First, the first measuring device 10 will be described. 11 is a reference water tank, 12 is a settlement meter, and 13 is a connecting pipe. The reference water tank 11 has a double structure including a reference water level tank 11A for creating a reference water level and a water receiving tank 11B for receiving overflow water from the reference water level tank 11A. When the runway 100 is constructed, the reference water tank 11 is embedded in an appropriate depth position so as not to be exposed from the road surface 101 in advance at the position of the measurement point 102A.

  On the other hand, the settlement meter 12 is installed in a manhole 103 constructed at a fixed point away from the runway 100, and the water receiving end 12 </ b> A of the settlement meter 12 is connected to the reference water level tank 11 </ b> A of the reference water tank 11 and the connecting pipe 13. It is connected. In addition, the exhaust end 12B of the subsidence meter 12 is connected to the air tube 40 and is opened to the atmospheric pressure, thereby preventing back pressure from being applied to the water filling portion in the subsidence meter 12.

  In the reference water level tank 11A, the water in the water tank 31 of the water supply device 30 is constantly supplied by the pump 32 via the first water supply pipe 33, so that the water level in the reference water level tank 11A is always predetermined. The water level is maintained at the reference water level. The water overflowing from the reference water level tank 11A flows into the water receiving tank 11B and is returned into the water supply tank 31 through the first return pipe 34.

  Although the configuration of the first measurement device 10 has been described above, the second measurement device 20 is configured in the same manner as the first measurement device 10. Therefore, among the parts of the second measuring device 20, the parts corresponding to the parts of the first measuring device 10 are assigned the same reference numerals in the 20s and the description thereof is omitted. In the reference water level tank 21A of the second measuring device 20, the water in the water supply tank 31 is supplied by the pump 35 through the second water supply pipe 36, and the overflowed water is received through the second return pipe 37. The water tank 21B is returned to the water tank 31.

  Since the first measuring device 10 and the second measuring device 20 are configured as described above, for example, when a road surface sinks at the measurement point 102A, the reference water tank 11 sinks according to the amount of sinking, and the reference water level The level of the water surface in the tank 11A falls according to the amount of settlement.

  This amount of descent can be detected by a settlement meter 12 disposed in the manhole 103, whereby the amount of road surface settlement at the measurement point 102A on the road surface 101 can be measured. Here, the reference water tank 11 is a double-structured water tank, and there is no movable part and no sensor part, so there is no need for adjustment, etc. Even if it is buried under the road surface 101, there is no problem in terms of maintenance. There is no need to dig up the runway 100 for maintenance of the first measuring device 10.

  On the other hand, the subsidence meter 12, which requires maintenance and adjustment, is installed in the manhole 103, so that it can be easily maintained or adjusted whenever necessary, and always ensures accurate measurement of the amount of subsidence. Is possible.

  Although the first measuring device 10 has been described above, the same applies to the second measuring device 20.

  Thus, according to the road surface subsidence measuring system 1, the reference water tank 11 and the subsidence meter 12 are in a 1: 1 relationship, the reference water tank 11 is used as a measurement unit, and the subsidence meter 12 is used on the reference water tank side. It can be used as a buried settlement meter. Therefore, the measuring method according to the present invention can be widely used not only for measuring the amount of settlement on the road surface of the runway but also for measuring the amount of settlement of other various structures.

BRIEF DESCRIPTION OF THE DRAWINGS The system schematic which shows one Embodiment of the road surface settlement amount measuring system by this invention. The detailed block diagram of the road surface subsidence measuring system shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Road surface subsidence measuring system 10 1st measuring device 20 2nd measuring device 11, 21 Reference water tank 11A, 21A Reference water level tank 12, 22 Settlement meter 13, 23 Connection pipe 30 Water supply apparatus 100 Runway 101 Road surface 102A, 102B Measurement point 103 Manhole

Claims (1)

  A method for measuring the amount of subsidence on a road surface, etc., wherein a reference water tank is embedded under a measurement point and a subsidence meter is arranged at a given fixed point, and the reference water tank and the subsidence meter are connected, and the reference water tank A method for measuring the amount of subsidence on a road surface or the like, wherein the amount of subsidence at the measurement point is measured by detecting a level change of the reference water surface with the subsidometer.

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