JP2019132707A - Ground surface displacement observation apparatus of tunnel path and ground surface displacement observation program of tunnel path - Google Patents

Abstract

To provide a ground surface displacement observation apparatus and a tunnel path displacement observation program of the tunnel path which can easily confirm a state of the displacement of the ground surface prior to a tunnel construction and the state of the displacement of the tunnel path in the tunnel path due to a progress of the tunnel construction.SOLUTION: An interested-area dividing unit 12 generates a divided region by dividing the interested-area including a route on a ground surface corresponding to the tunnel path set by an interested-area setting unit 10, a displacement information generating unit 16 generates displacement information including the displacement of the ground surface from a time series image data obtained by a radar device such as SAR, and a displacement information collection unit 18 collects the displacement information for each of the dividing region. A representative value calculation unit 20 calculates the representative value of the displacement in each dividing region based on the displacement information collected for each dividing region. A display control unit 24 displays a longitudinal view representing a displacement amount of the ground surface corresponding to the tunnel path to an appropriate display device.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a ground surface displacement observation apparatus for a tunnel route and a ground surface displacement observation program for a tunnel route.

  When tunnel construction is performed, ground deformation such as ground subsidence or ground uplift often occurs. Observing such ground deformation is important for construction management requirements.

  For example, in Patent Document 1 below, a technique for acquiring XYZ coordinates of the ground surface in the area surrounding the tunnel construction from surveying by a surveying instrument, and creating a distribution map of the settlement of the ground surface in the area surrounding the tunnel construction based on the acquired data. Is disclosed.

JP 2007-40773 A

  However, in the above-described conventional technique, since the ground worker uses a surveying instrument to measure the amount of land subsidence, the number of measurement points, the number of measurements, and the like are limited. In addition, for example, such measurement may not be possible on a private site.

  Therefore, regarding the displacement of the ground surface on the planned route of tunnel construction, whether or not there is an influence of the construction (whether or not it has settled from before construction), the displacement of the ground surface after construction (ground fluctuation due to construction or ground due to tunnel installation) It was difficult to grasp the presence or absence of fluctuation.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a ground surface displacement observation apparatus and a tunnel for a tunnel route that can easily understand the state of ground surface displacement before tunnel construction and the state of ground surface displacement in the tunnel construction route resulting from the progress of tunnel construction. The purpose is to provide a ground surface displacement observation program.

  In order to achieve the above object, an embodiment of the present invention is an apparatus for observing a ground surface displacement of a tunnel route, and includes a region of interest setting means for setting a region of a predetermined range including the tunnel route as a region of interest. A region-of-interest dividing unit that divides the region of interest into a predetermined range to generate a segmented region, and time-series image data of the ground surface in the region of interest that is an observation target acquired by a radar device at different times, Displacement information generating means for generating displacement information on the ground surface, displacement information collecting means for collecting the displacement information generated by the displacement information generating means for each divided area in the region of interest, and collecting for each divided area Based on the displacement information thus obtained, representative value calculation means for calculating a representative value of displacement in each divided area, and the calculated representative value as a displacement amount of the ground surface corresponding to the tunnel route. And display means for displaying, the display means, and displaying the altitude and the representative value of the ground surface of the tunnel path, as vertical view at different scales.

  Further, the ground surface displacement observation device of the tunnel route further includes a polygon extracting means for extracting a polygon of a predetermined feature existing in the region of interest, and the displacement information generating means includes displacement information on the polygon. It is good also as a structure produced | generated as displacement information of the said ground surface.

  The representative value is preferably a median value.

  The region of interest is preferably a certain region including the tunnel route and both sides of the tunnel route.

  Further, it is preferable that the region of interest dividing means divides the region of interest at a constant distance.

  In another embodiment of the present invention, there is provided a program for observing a ground surface displacement of a tunnel route, wherein the computer sets a region of interest including a tunnel route as a region of interest, the region of interest setting means, A region-of-interest dividing unit that divides the region into predetermined ranges to generate a segmented region, from time-series image data of the surface of the region of interest in the region of interest acquired by the radar device at different times, Displacement information generating means for generating displacement information, displacement information collecting means for collecting the displacement information generated by the displacement information generating means for each divided region in the region of interest, based on the displacement information collected for each divided region , Representative value calculating means for calculating a representative value of displacement in each divided area, and displaying the calculated representative value as a displacement amount of the ground surface corresponding to the tunnel route Rutotomoni, characterized in that to function and elevation and the representative value of the ground surface of the tunnel path, as a display means for displaying a longitudinal view in a different scale.

  ADVANTAGE OF THE INVENTION According to this invention, the situation of the displacement of the ground surface before tunnel construction and the situation of the displacement of the ground surface in the tunnel path | route resulting from the progress of tunnel construction can be confirmed easily.

It is a figure which shows the structural example of the observation system of the ground surface displacement containing the ground surface displacement observation apparatus of the tunnel path | route concerning embodiment. It is a block diagram of the structural example of the ground surface displacement observation apparatus of the tunnel path | route concerning embodiment. It is a figure which shows the example of the region of interest and division area which the display control part concerning embodiment displays on a display apparatus. It is explanatory drawing of the method of calculating a representative value using the polygon extracted by the polygon extraction part concerning embodiment. It is a figure which shows the example of a display of the longitudinal view which the display control part concerning embodiment displays. It is a flowchart of the operation example of the ground surface displacement observation apparatus of the tunnel path | route concerning embodiment.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  FIG. 1 shows a configuration example of a ground surface displacement observation system including a ground surface displacement observation device for a tunnel path according to an embodiment. In the example of FIG. 1, a tunnel path 100 is shown, and a synthetic aperture radar in which a satellite or the like is provided with a change in the relative height of the position on the ground corresponding to the position of the tunnel path 100 and the surrounding ground surface. Measured by (synthetic aperture radar: SAR) 102, and the ground surface displacement (relative height fluctuation) is determined by interference SAR analysis. Here, the tunnel route 100 is a route determined in advance in the tunnel construction plan, and the tunnel route scheduled for construction (indicated by a broken line in FIG. 1) and the tunnel route under construction and construction (indicated by the solid line in FIG. 1). Included).

  In FIG. 1, the timing for starting the measurement by the SAR 102 is, for example, in the case of a satellite with an orbiting period of 11 days, before the above construction (approximately half a year before the area is planned for construction in a period that can be measured about 15 times or more). ). By the measurement before the start of the construction, a position that can be accurately measured by the synthetic aperture radar 102 is specified in advance. After the start of the construction, measurement is performed using the data at the position every satellite cycle (for example, 11 days). By using the data at the position, it is possible to measure with high accuracy.

  Information on the relative height change of the ground surface (radar image data) measured by the SAR 102 is transmitted to the ground surface displacement observation device 104 of the tunnel path included in the ground surface displacement observation system. The ground surface displacement observation device 104 of the tunnel route obtains and outputs the temporal change of the ground surface displacement before, during and after the tunnel construction.

  FIG. 2 shows a block diagram of a configuration example of the ground surface displacement observation device 104 of the tunnel route. In FIG. 2, the ground surface displacement observation device 104 of the tunnel route includes a region of interest setting unit 10, a region of interest dividing unit 12, a radar image data acquiring unit 14, a displacement information generating unit 16, a displacement information collecting unit 18, and a representative value calculating unit. 20, a polygon extraction unit 22, a display control unit 24, a communication unit 26, a storage unit 28, and a CPU 30. Note that a GPU other than the CPU 30 may be used. The ground surface displacement observation device 104 of the tunnel route includes a CPU 30, a ROM, a RAM, a nonvolatile memory, an I / O, a communication interface, and the like, and is configured as a computer that controls the entire device and performs various calculations. The function is realized by, for example, the CPU 30 and a program that controls the processing operation of the CPU 30.

  The region-of-interest setting unit 10 sets a region in a predetermined range including the route on the ground surface corresponding to the tunnel route as the region of interest. Here, the region of interest is a region where the user desires to observe displacement, and in this embodiment, is a region including a route on the ground surface corresponding to the tunnel route. The path on the ground surface corresponding to the tunnel path refers to a position on the ground surface corresponding to the position of the tunnel excavated underground, that is, a projected path of the tunnel path onto the ground surface. The region-of-interest setting unit 10 sets a buffer area having a predetermined width on both sides of the route on the ground surface corresponding to the tunnel route, and sets the route on the ground surface corresponding to the tunnel route and the buffer route as the region of interest. To do. The region-of-interest setting unit 10 may set the region of interest based on instruction information for designating the region of interest, which is input by the user from an appropriate input unit such as a keyboard or a mouse. The region-of-interest setting unit 10 reads out map information stored in advance in the storage unit 28 by a method such as obtaining from an external server via the communication unit 26 and sets the region of interest on the map information. The region of interest set by the region of interest setting unit 10 is stored in the storage unit 28. When the user specifies a desired region of interest, the display control unit 24 causes the liquid crystal display device or other appropriate display means to display the map information read from the storage unit 28 and through the screen. It is preferable that the user inputs instruction information (for example, information specifying a specific area on the map). Details of the region of interest will be described later.

  The region-of-interest dividing unit 12 reads the region of interest set by the region-of-interest setting unit 10 from the storage unit 28 and divides it into a predetermined range to generate a divided region. The divided region is preferably a region divided at a constant distance (for example, every 100 m) along the route on the ground surface corresponding to the tunnel route. In addition, the said fixed distance can be suitably determined according to a use purpose. The method of dividing the region of interest may be divided by the region of interest dividing unit 12 based on division instruction information input by a user from an appropriate input means such as a keyboard or a mouse, or divided at predetermined distances. Also good. The divided areas are stored in the storage unit 28. The division instruction information or the predetermined distance is also stored in the storage unit 28, and the region-of-interest division unit 12 reads one of these from the storage unit 28 and executes the region-of-interest division process. can do.

  The radar image data acquisition unit 14 acquires radar image data measured by the SAR 102 or the like mounted on the satellite from the communication unit 26 received via a ground station (not shown). The acquired radar image data is stored in the storage unit 28. In this case, the radar image data is stored in the storage unit 28 as a plurality of radar image data (time-series image data) acquired at different times. The radar image data includes information on the phase of the reflected wave from the ground surface.

  The displacement information generation unit 16 reads time-series image data of the ground surface in the region of interest, which is the observation target, acquired by the radar device such as the SAR 102 at different times from the storage unit 28, and the displacement of the ground surface (the displacement of the altitude) ) Including displacement information is generated. Here, the different time means that the acquisition time of the radar image data is different. The displacement information generation unit 16 calculates the displacement generated during the time from a set of radar image data acquired at different times, and generates the displacement information. The displacement information on the ground surface is information on the displacement of the distance between the SAR 102 and the ground surface, and is calculated based on the phase difference between the radar image data having different acquisition times in the time series image data. The displacement is calculated for each pixel of the radar image data. By using radar image data and a digital elevation model (DEM), it is possible to correlate each pixel with a position on the ground surface, so that the calculated displacement is a displacement on the ground surface. be able to. For this reason, the displacement information can include coordinate information representing the position of the displacement. Based on this displacement information, it is possible to observe the displacement of the ground surface (displacement such as land subsidence and ground uplift associated with tunnel construction). Note that the displacement information generation unit 16 may generate only the displacement information in the region of interest. The displacement information generated by the displacement information generation unit 16 is stored in the storage unit 28.

  The displacement information collection unit 18 reads out the displacement information generated by the displacement information generation unit 16, the region of interest set by the region-of-interest setting unit 10, and the divided region generated by the region-of-interest dividing unit 12 from the storage unit 28. Displacement information is collected for each divided area. As described above, since the displacement information is calculated for each pixel of the radar image data, the displacement information collection unit 18 also collects the displacement information for each pixel in the divided area. Further, since the position of each pixel is known from the coordinate information included in the displacement information, the displacement information collection unit 18 determines whether each pixel whose displacement has been calculated is a pixel in the region of interest, In the case of a pixel, it can be determined to which divided region it belongs. In the case where the displacement information generation unit 16 is configured to generate only displacement information in the region of interest, the displacement information collection unit 18 may determine which divided region the pixel belongs to. In addition, it is preferable that a plurality of pieces of displacement information in each divided region exist for each divided region in order to improve the accuracy and reliability of the calculation result of the representative value calculation unit 20 described later. Therefore, when the region of interest dividing unit 12 divides the region of interest, the size (area) of the divided region is made sufficiently larger than the pixel. The displacement information collected by the displacement information collection unit 18 for each divided region is stored in the storage unit 28.

  The representative value calculation unit 20 reads out the displacement information collected for each divided region by the displacement information collection unit 18 from the storage unit 28, and calculates the representative value of the displacement in each divided region based on the displacement information. Any representative value can be used as long as it can represent (represent) the displacement of each divided region. For example, the median value of the displacement included in the displacement information collected for each divided region (median), An average value etc. are mentioned, A median value is more suitable. The representative value calculated by the representative value calculation unit 20 is stored in the storage unit 28.

  The polygon extraction unit 22 extracts polygons of predetermined features existing in the region of interest set by the region of interest setting unit 10. Here, examples of the feature polygon include, but are not limited to, polygons such as houses, roads, and rivers. Information on the polygon, that is, the type, shape, and position information of the polygon is stored in the storage unit 28 in advance, and is read out from the storage unit 28 and used by the polygon extraction unit 22.

  The displacement information generation unit 16 may be configured to generate displacement information from time-series image data that overlaps (on the polygons) the polygon extracted by the polygon extraction unit 22 in the region of interest. In this case, the displacement information collecting unit 18 collects the displacement information on the polygon as the displacement information on the ground surface for each divided region, and the representative value calculating unit 20 can calculate the representative value from the displacement information.

  Further, the representative value calculation unit 20 may be configured to calculate a temporal change of the representative value. Here, the change of the representative value with time means the change of the representative value per unit time, that is, the speed of change of the representative value. The change in the representative value over time is, for example, the representative value calculated by the representative value calculating unit 20 and the acquisition time (according to the SAR 102) of the set of radar image data used by the displacement information generating unit 16 to generate the displacement information that is the representative value. One of the acquisition times of the radar image data) is associated and stored in the storage unit 28, and the representative value calculation unit 20 reads the two representative values and the acquisition time associated therewith from the storage unit 28, and the difference between the representative values Can be obtained by dividing by the difference in acquisition time.

  The display control unit 24 reads the representative value calculated by the representative value calculation unit 20 from the storage unit 28, controls the liquid crystal display device or other appropriate display device, and displays it as a displacement amount of the ground surface corresponding to the tunnel path. Here, the ground surface corresponding to the tunnel route refers to the ground surface on the projected route onto the ground surface of the tunnel route. When the display control unit 24 displays the representative value, it displays the tunnel route, that is, the tunnel route scheduled to be constructed and the altitude of the ground surface corresponding to the tunnel route under construction and construction. In this case, it is preferable to display the elevation and the representative value of the ground surface corresponding to the tunnel route as a vertical section on different scales. A display example as a longitudinal view will be described later.

  The communication unit 26 includes an appropriate interface, and is used by the CPU 30 to exchange data with an external server or the like via a wireless or wired communication line. For example, the communication unit 26 also receives radar image data transmitted from a satellite equipped with the SAR 102 or the like.

  The storage unit 28 includes a nonvolatile memory such as a hard disk device or a solid state drive (SSD), and performs various processes performed by the ground surface displacement observation device 104 on the tunnel path, such as the above-described various information and the operation program of the CPU 30. Remember the information you need. As the storage unit 28, a digital versatile disk (DVD), a compact disk (CD), a magneto-optical disk (MO), a flexible disk (FD), a magnetic tape, an electrically erasable / rewritable read-only memory ( EEPROM), flash memory or the like may be used. In addition, the storage unit 28 includes a random access memory (RAM) that mainly functions as a work area of the CPU 30 and a read-only memory (ROM) that stores control programs such as BIOS and other data used by the CPU 30. Is preferred.

  FIG. 3 shows an example of a region of interest and a divided region that the display control unit 24 displays on the display device. In FIG. 3, a route T on the ground surface corresponding to the tunnel route is indicated by a broken line. The region-of-interest setting unit 10 sets a buffer region B having a predetermined width on both sides of the route T, and combines the route T on the ground surface corresponding to the tunnel route and the buffer regions B set on both sides thereof. Let it be area Ia. As described above, the region of interest Ia may be set based on the instruction information for designating the region of interest input by the user.

The region of interest dividing unit 12 divides the region of interest Ia into a predetermined range (distance) to generate a divided region. In the example of FIG. 3, divided areas D _{1 to} D ₉ are displayed. Note that the number of divided areas is not limited to _nine (D _{1 to} D ₉ ), and is appropriately determined according to the length of the tunnel path, the accuracy required for observing the displacement of the ground surface, and the like.

  As described above, the displacement information generation unit 16 generates displacement information from the radar image data (time-series image data) of the ground surface in the region of interest Ia. In the example of FIG. 3, the acquisition position S of the displacement of the ground surface included in the radar image data used for generating the displacement information is displayed by a square (square). This position S is obtained by a radar device such as SAR102. This is the displacement acquisition position. Note that the displacement acquisition position is acquired not only inside the region of interest Ia but also outside. In the example of FIG. 3, the position of the displacement acquired outside the region of interest Ia is indicated by So. The displacement information generation unit 16 generates displacement information from the displacements acquired inside the region of interest Ia among the displacements acquired inside and outside the region of interest Ia in this way.

The displacement information collection unit 18 collects displacement information including the displacement of the ground surface generated by the displacement information generation unit 16 in the region of interest Ia for each of the divided regions D _{1 to} D ₉ . Representative value calculation unit 20, a representative value of the displacement included in the above manner divided regions D ₁ to D ₉ collected displacement information for each computed as a representative value of each divided area D ₁ to D _9. The display control unit 24 displays the representative value of each of the divided regions D _{1 to} D ₉ on the appropriate display device as the displacement amount in the route T on the ground surface corresponding to the tunnel route.

  FIG. 4 shows an explanatory diagram of a method for calculating the representative value using the polygon extracted by the polygon extraction unit 22. In FIG. 4, the displacement information generation unit 16 reads out the region of interest Ia and radar image data (in FIG. 4, expressed as displacement data, and displayed as □ (square)) from the storage unit 28 (I), and the region of interest Ia Displacement data partially included in the region is extracted (II). As described above, the position of each pixel of the radar image data can be known by using DEM, so that the extraction of (II) can be performed. A set of squares (squares) shown in (III) of FIG. 4 is the displacement data extracted in (II) above, and is displacement data partially included in the region of interest Ia. In this case, the displacement information generation unit 16 may be configured to extract displacement data that is completely included in the region of interest region Ia.

  Next, the displacement information generation unit 16 includes the set of □ (quadrangle) shown in (III) above and the polygons of the features extracted by the polygon extraction unit 22 (in FIG. 4, a house polygon is illustrated). (IV), displacement data partially included in the house polygon region is extracted (V), and displacement information including this displacement data is generated (VI). In this case, the displacement information generation unit 16 may extract displacement data at a location where the displacement data is completely included in the area of the house polygon.

  The displacement information collection unit 18 collects the displacement information on the polygon as displacement information on the ground surface for each divided region, and the representative value calculation unit 20 calculates a representative value from this displacement information.

  5A and 5B show display examples of vertical views displayed by the display control unit 24. FIG. FIG. 5A is a plan view showing a region of interest Ia including a route T on the ground surface corresponding to the tunnel route. FIG. 5B shows a longitudinal view corresponding to the path T. In FIG. 5A, the route T is indicated by a broken line, and the region of interest Ia is indicated as a region surrounded by a one-dot chain line. 5 (a) and 5 (b) show an example in which tunnel construction is in progress at two points P1 and P2 at the same time, the number of construction progress points is limited to two. is not.

  As described above, the representative value of the displacement calculated for each divided region set in the region of interest Ia shown in FIG. 5A is the displacement of the ground surface in the path T, and FIG. It is displayed in the vertical section. In the example of FIG. 5B, the altitude on the ground surface of the tunnel route is indicated by a two-dot chain line, and the representative value is displayed as a bar graph for each divided region. However, the present invention is not limited to this combination.

  In the example of FIG. 5B, the altitude on the ground surface of the tunnel route and the above representative value are displayed at the same time. The altitude on the ground surface of the tunnel route is a value in units of meters (m), and the above representative value. Is usually a unit of millimeter (mm) or less, and therefore, the scales of the two are made different in order to make it easy to identify the representative value. Specifically, the representative value is enlarged (for example, 1000 times) and displayed. In the bar graph, the upper side of the two-dot chain line representing the altitude on the ground surface of the tunnel route indicates the uplift, and the lower side indicates the subsidence.

  As shown in FIG. 5B, when the representative value is displayed as a bar graph, it may be displayed for each type of polygon extracted by the polygon extraction unit 22. That is, a bar graph is displayed for each representative value calculated by the representative value calculation unit 20 using different polygons. In the example of FIG. 5B, the representative value calculated from the house polygon and the road polygon is displayed as another bar graph.

  In FIG. 5B, the representative value calculated from the road polygon and the representative value calculated from the house polygon are independent, and the length of each bar graph indicates the value of the representative value calculated from each polygon. . For this reason, the displacement (representative value) in the road and the house can be respectively displayed according to FIG.

  In addition, with the passage of time, the progress of tunnel construction, etc., there may be a change in the size of the elevation or settlement of the ground surface. In this case, a configuration in which the height of the bar graph is updated with the changed value is preferable.

  FIG. 6 is a flowchart of an operation example of the ground surface displacement observation apparatus 104 for the tunnel route according to the embodiment. In FIG. 6, the region-of-interest setting unit 10 selects a region in a predetermined range including a route on the ground surface corresponding to the tunnel route based on the instruction information for specifying the region of interest input by the user. The region of interest is set and stored in the storage unit 28 (S1). Next, the region-of-interest dividing unit 12 reads the region of interest set by the region-of-interest setting unit 10 from the storage unit 28, divides it into a predetermined range, generates a divided region, and stores it in the storage unit 28 (S2). .

  Also, the radar image data acquisition unit 14 acquires radar image data measured by the SAR 102 mounted on the satellite from the communication unit 26 received from the satellite, and stores it in the storage unit 28 (S3).

  The displacement information generation unit 16 reads time-series image data of the ground surface in the region of interest, which is the observation target, acquired by the radar device such as the SAR 102 at different times from the storage unit 28, and the displacement of the ground surface (the displacement of the altitude) ) Is generated (S4). The displacement information collection unit 18 reads out the displacement information generated by the displacement information generation unit 16, the region of interest set by the region-of-interest setting unit 10, and the divided region generated by the region-of-interest dividing unit 12 from the storage unit 28. Displacement information is collected for each divided region (S5).

  The representative value calculation unit 20 reads the displacement information collected by the displacement information collection unit 18 for each divided region from the storage unit 28, and calculates the representative value of the displacement in each divided region based on the displacement information (S6).

  The display control unit 24 reads the representative value calculated by the representative value calculation unit 20 from the storage unit 28, and controls the liquid crystal display device or other appropriate display device to represent the displacement amount of the ground surface corresponding to the tunnel path. (S7).

  The above-described program for executing each step of FIG. 6 can be stored in a recording medium, and the program may be provided by communication means. In that case, for example, the above-described program may be regarded as an invention of a “computer-readable recording medium recording a program” or an invention of a “data signal”.

DESCRIPTION OF SYMBOLS 10 Region-of-interest setting part, 12 Region-of-interest division part, 14 Radar image data acquisition part, 16 Displacement information generation part, 18 Displacement information collection part, 20 Representative value calculation part, 22 Polygon extraction part, 24 Display control part, 26 Communication part , 28 Storage unit, 30 CPU, 100 Tunnel route, 102 SAR, 104 Tunnel surface ground displacement observation device.

Claims (6)

A region of interest setting means for setting a region of a predetermined range including a tunnel route as a region of interest;
A region of interest dividing means for dividing the region of interest into a predetermined range to generate a divided region;
Displacement information generating means for generating displacement information of the ground surface from time-series image data of the ground surface in the region of interest that is the observation target acquired by the radar device at different times;
Displacement information collecting means for collecting the displacement information generated by the displacement information generating means for each divided region in the region of interest;
Based on displacement information collected for each of the divided areas, representative value calculating means for calculating a representative value of displacement in each divided area;
Display means for displaying the calculated representative value as a displacement amount of the ground surface corresponding to the tunnel route;
The display means displays the altitude on the ground surface of the tunnel route and the representative value as vertical sections on different scales as a tunnel surface ground displacement observation apparatus. Polygon extraction means for extracting polygons of predetermined features existing in the region of interest;
The ground displacement observation device for a tunnel route according to claim 1, wherein the displacement information generation means generates displacement information on the polygon as displacement information on the ground surface.   The tunnel surface ground surface displacement observation apparatus according to claim 1 or 2, wherein the representative value is a median value.   The ground surface displacement observation device for a tunnel route according to any one of claims 1 to 3, wherein the region of interest is a fixed region including the tunnel route and both sides of the tunnel route.   The tunnel surface ground surface displacement observation apparatus according to any one of claims 1 to 4, wherein the region of interest dividing unit divides the region of interest at a constant distance. Computer
A region of interest setting means for setting a region of a predetermined range including the tunnel route as a region of interest,
A region-of-interest dividing means for dividing the region of interest into a predetermined range to generate a divided region;
Displacement information generating means for generating displacement information of the ground surface from time-series image data of the ground surface in the region of interest that is the observation target acquired by the radar device at different times;
Displacement information collecting means for collecting displacement information generated by the displacement information generating means for each divided region in the region of interest;
Representative value calculating means for calculating a representative value of displacement in each divided region based on the displacement information collected for each divided region;
The display means for displaying the calculated representative value as a displacement amount of the ground surface corresponding to the tunnel route, and displaying the elevation on the ground surface of the tunnel route and the representative value as a vertical section on different scales,
A ground surface displacement observation program for tunnel routes.

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