Method for constructing a rubble mound, information processing device, and information processing program

Abstract

To finish a top of a rubble mound to a designed height without removing poured rubble, pouring additional rubble later, or carrying out re-compaction as a rework.SOLUTION: A construction method of a rubble mound includes the steps of: calculating an impact assessment point indicating a magnitude of an impact received when compacting a rubble group at a construction site around one construction site of a plurality of divided construction sites, using a displacement impact map indicating a magnitude of an impact received by a rubble group around a site to be compacted, while reflecting a construction order of the plurality of construction sites; and setting, based on the impact assessment point, a top height of a corresponding construction site immediately after compaction when compacting a rubble group at the corresponding construction site, as a height obtained by adding / reducing a displacement amount due to an impact when compacting a rubble group at surrounding construction sites, to / from a predetermined design height.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a method for constructing a riprap mound, an information processing apparatus, and an information processing program.

Background Art

[0002] In a method for constructing a riprap mound in which a weight is dropped onto a group of riprap stones placed on the seabed to compact the group of riprap stones in order to construct a foundation mound for a breakwater or a revetment, conventionally, techniques have been proposed to solve the problem that the riprap stones generated around the weight drop point bulge. For example, in Patent Document 1, for an underwater riprap foundation having a required surplus height higher than the planned ground surface height of the foundation compaction leveling method, a rolling operation is performed by repeatedly freely dropping a weight until the planned ground surface height is reached for compaction leveling, and after removing the required amount of the group of riprap stones that have been wrinkled and bulged by the rolling operation by means of a riprap removal means such as a grab bucket, a method of rolling the removed portion with a weight is described.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a riprap mound under construction, there are portions that are likely to bulge and portions that are likely to sink in the peripheral portions that have already been compacted by the impact of a rigid object (for example, the drop of a weight). If the bulged riprap stones are simply removed without considering the influence of sinking, as the compaction progresses, portions that have been maintained at the design height until then may sink, and it may become necessary to add riprap stones again.

[0005] One aspect of the present invention has been made in view of the above-mentioned problems, and aims to achieve a method for constructing a rubble mound by compacting rubble with a rigid object, in which the top surface of the rubble mound is finished to the height specified in the design, without removing the rubble that has been put in, adding rubble later, or having to perform recompacting. [Means for solving the problem]

[0006] To solve the above problems, a method for constructing a rubble mound according to one aspect of the present invention is a method for constructing a rubble mound in which a group of rubble stones placed on the seabed is struck from above with a rigid object to compact the rubble stones, and the method comprises the steps of: using a displacement influence map that shows the magnitude of the influence that the rubble stones receive around the area where the rubble stones are struck and compacted with the rigid object, calculating an influence evaluation point for one of the construction sites of which the construction site of the rubble mound is divided into multiple construction sites, taking into account the construction order for the multiple construction sites; determining the height of the top surface of the construction site immediately after compaction of the rubble stones at the corresponding construction site, based on the calculated influence evaluation point, to a height obtained by adding or subtracting the amount of displacement due to the influence when the rubble stones at the surrounding construction sites are compacted from a predetermined design height; and striking the rubble stones at each construction site from above with the rigid object to compact the top surface of the construction site to the determined height.

[0007] Furthermore, an information processing device according to another aspect of the present invention is an information processing device used in the construction of a rubble mound, in which a group of rubble stones placed on the seabed is struck from above with a rigid object to compact the rubble stones, and comprises: a calculation unit that uses a displacement influence map showing the magnitude of the influence the rubble stones receive around the location where the rubble stones are struck and compacted with the rigid object, and for one of the construction locations of the rubble mound, which is divided into multiple construction locations, calculates influence evaluation points that show the magnitude of the influence the rubble stones receive when compacted at the construction locations surrounding the one construction location, reflecting the construction order for the multiple construction locations; and a determination unit that, based on the calculated influence evaluation points, determines the height of the top surface of the construction location immediately after compaction of the rubble stones at the corresponding construction location to be a predetermined design height plus or minus the amount of displacement due to the influence of compacting the rubble stones at the surrounding construction locations.

[0008] Each aspect of the present invention may be implemented by a computer, in which case the information processing program for the information processing device that enables the computer to implement the information processing device by operating the computer as each part (software element) of the information processing device, and a computer-readable recording medium on which the program is recorded, also fall within the scope of the present invention. [Effects of the Invention]

[0009] According to one aspect of the present invention, the top surface of a rubble mound can be finished to the designed height without removing the rubble that has been placed, adding rubble later, or having to perform recompacting work. [Brief explanation of the drawing]

[0010] [Figure 1] This is a side view showing an example of compaction and leveling work using a weight according to one embodiment of the present invention. [Figure 2] This is a side view, enlarged from a portion of Figure 1. [Figure 3] This flowchart shows an example of the configuration of an information processing device included in the compaction device according to the same embodiment. [Figure 4] This graph shows an example of displacement shape data used by the information processing device according to the same embodiment, specifically when the peripheral area is compacted. [Figure 5] This graph shows another example of displacement shape data used in information processing by the information processing device according to the same embodiment, where the peripheral area is not compacted. [Figure 6] This figure shows an example of a displacement influence map used by the information processing device according to the same embodiment for processing information. [Figure 7] This figure shows an example of how to divide a construction site into multiple construction areas and how to set the order of construction. [Figure 8] This figure illustrates the calculation of impact evaluation points performed by the information processing device according to the same embodiment. [Figure 9] This is a list showing an example of finishing patterns used by the information processing device according to the same embodiment for processing information. [Figure 10] This flowchart shows an example of a flow of a method for constructing a rubble mound according to another embodiment of the present invention. [Modes for carrying out the invention]

[0011] <Embodiment> One embodiment of the present invention will be described in detail below.

[0012] [Compaction device] First, the outline of the compacting device will be described. The compacting device 100 is a device used for constructing a discarded stone mound. As shown in FIG. 1, the compacting device 100 according to the present embodiment includes a crane 1, a weight 2 (rigid body), and an information processing device 3. The crane 1 and the weight 2 can be of conventionally known types. Note that the form of the compacting device 100 is not limited to the form in which the weight is dropped using a crane as shown in FIG. 1. That is, the form of the compacting device 100 may be, for example, a form in which an impact is given by a rigid body such as a hammer, or a form in which a subsea walking machine equipped with a weight or a hammer is used. The information processing device 3 may be provided in the crane 1 or may be provided at a location separated from the crane 1 in a state communicable with the crane 1.

[0013] When the discarded stone group thrown into the seabed is struck from above using the compacting device 100, as shown in FIG. 2, the discarded stone group below the weight 2 sinks and is compacted. Also, at this time, the discarded stone group sinks even near the end 2a of the weight 2. On the other hand, at a location horizontally separated from the end 2a of the weight 2, the discarded stone group bulges. The range and degree of sinking and bulging of the discarded stone group around the striking part differ depending on whether the discarded stone group has already been compacted or not. The difference in the range and degree of sinking and bulging of this discarded stone group will be described later.

[0014] [Details of the Information Processing Device] Next, the details of the information processing device 3 will be described. The information processing device 3 is a computer used for constructing a discarded stone mound by striking a discarded stone group thrown into the seabed from above with a rigid object to compact the discarded stone group. As shown in FIG. 3, the information processing device 3 includes an input unit 31, an output unit 32, a storage unit 33, and a control unit 34.

[0015] [Input Unit] The input unit 31 is composed of at least one of a communication module that receives data and signals from other devices, a terminal connected to other devices, a drive that reads information from a recording medium, and an operating device that can be operated by a user. The operating device includes at least one of a keyboard, a mouse, and a touch panel.

[0016] 〔Output Unit〕 The output unit 32 is composed of at least one of a communication module that transmits data and signals to other devices (such as a display device, the crane 1, etc.), a terminal connected to other devices, a drive that writes information to a recording medium, and a display device such as a display that displays images.

[0017] 〔Storage Unit〕 The storage unit 33 stores various programs (including the information processing program 331) in which the operations to be performed by the control unit 34 are described. Further, the storage unit 33 according to the present embodiment stores displacement shape data 332 (details will be described later). Further, the storage unit 33 according to the present embodiment stores a displacement influence map 333 (details will be described later). Further, the storage unit 33 according to the present embodiment is composed of a semiconductor memory, a hard disk drive, etc.

[0018] 〔Control Unit〕 The control unit 34 includes a data acquisition unit 341, a calculation unit 342, a determination unit 343, and an output control unit 344. The control unit 34 according to the present embodiment is composed of a processor, a memory, etc. When the processor executes the information processing program 331 stored in the storage unit 33, the information processing program 331 can cause the control unit 34 to function as the above respective control blocks 341 to 344.

[0019] (Data Acquisition Unit) The data acquisition unit 341 acquires displacement shape data 332 stored in the storage unit 33. Displacement shape data 332 is data indicating the amount of displacement of the rubble group surrounding the striking point, which occurs when the rubble group is struck from above with a rigid object. Displacement shape data 332 is data obtained by numerical analysis or actual measurement. The method for creating the displacement shape data 332 will be explained below in "Method for constructing a rubble mound". Note that the data acquisition unit 341 may be configured to acquire the displacement shape data 332 from another device via the input unit 31, rather than from the storage unit 33.

[0020] As shown in Figure 4, the displacement shape data 332 according to this embodiment is a graph with the horizontal distance from the end 2a (lower end side of the weight 2: see Figure 2) of the weight 2 when it falls onto the rubble group as the horizontal axis, and the displacement of the rubble group as the vertical axis. The displacement of the rubble group is a relative value (dimensionless displacement) when the height of the top of the weight 2 before it falls is set to 0 and the settlement of the weight 2 is set to, for example, -1.0. The trend of displacement of the rubble group differs depending on whether the area around the rubble group has already been compacted or not. The displacement shape data 332 when the surrounding area has already been compacted shows, for example, as shown in Figure 4, that when the surrounding area to be compacted is compacted, dragged settlement occurs in the range up to about 3m from the point where the weight 2 falls, and a gentle uplift occurs in the range of about 4m from the point where it falls. On the other hand, the displacement shape data 332 when the surrounding area to be compacted is not yet compacted shows, as in Figure 5, that dragged settlement occurs in the range up to about 0.5m from the point where the weight 2 falls, and a large uplift occurs in the range of about 2m from the point where it falls. In other words, both Figures 4 and 5 show that there is settlement near the end 2a of the weight 2, and that there is a tendency for uplift as you move away from it.

[0021] Furthermore, the data acquisition unit 341 acquires the displacement influence map 333 stored in the storage unit 33. The displacement influence map 333 is a map that shows the magnitude of the influence that the rubble group receives around the area where it is compacted by impact with a rigid object. The displacement influence map 333 is a map created based on the displacement shape data 332. The method for creating the displacement influence map 333 will be explained below in "Method for constructing a rubble mound". Note that the data acquisition unit 341 may be configured to acquire the displacement influence map 333 from another device via the input unit 31, rather than from the storage unit 33.

[0022] As shown in Figure 6, the displacement influence map 333 according to this embodiment has a grid of n squares × n squares (for example, 7 squares × 7 squares). Each square corresponds to one of several construction locations P1...PN (where N is the order of construction) into which the rubble mound construction site is divided. The central square corresponds to the construction location to be compacted (the location where the weight is dropped). Some squares within a predetermined range from the central square have numerical values ​​written on them. These values ​​indicate the magnitude of the impact on the rubble group at the construction location corresponding to the square where the value is written, when the construction location corresponding to the central square of the map is compacted. Hereinafter, the numerical values ​​written on each square of the displacement influence map 333 will be referred to as influence values. A positive influence value means that the construction location corresponding to that square is likely to be uplifted by the surrounding compaction. Furthermore, a larger influence value means a greater degree of uplift. On the other hand, a negative influence value means that the construction location corresponding to that square is likely to settle due to the surrounding compaction. Furthermore, a larger absolute value of the impact indicates a greater degree of subsidence.

[0023] (Calculation section) The calculation unit 342 uses the displacement influence map 333 to calculate influence evaluation points for multiple construction sites P1...PN, reflecting the construction order. The influence evaluation points are numerical values ​​that indicate the magnitude of the impact on one construction site Pn when the rubble group at construction sites Pn+1...PN surrounding one construction site Pn is compacted. In this embodiment, the calculation unit 342 refers to the displacement influence map 333 to identify the influence points at construction site Pn when compacting is performed at each construction site Pn+1...PN that is compacted after the first construction site Pn, and accumulates them. Note that compaction at construction sites P1...Pn-1, which is compacted before the first construction site Pn, does not affect the first construction site Pn after compaction. Therefore, when calculating the impact assessment point for a single construction site Pn, construction sites P1 to Pn-1, which are compacted before construction site Pn, are not taken into consideration.

[0024] As a concrete example, consider a case where the construction site is divided into 108 (9x12 grid) construction locations (the grid numbers indicate the order of construction), as shown in Figure 7, and we are trying to calculate the impact evaluation point for the 4th construction location P4 (which has been completed) (the impact evaluation points for the 1st to 3rd construction locations P1 to P3 have already been calculated). The calculation unit 342 first identifies the impact value at the 4th construction location P4 when compaction is performed at the 5th construction location P5. As shown in Figure 8, when the central grid of the displacement impact map 333 corresponds to the 5th construction location P5, the grid corresponding to the 4th construction location P4 is the grid one square above the central grid. The impact value (-1) of this grid one square above the central grid represents the magnitude of the impact that compaction at the 5th construction location P5 has on the 4th construction location P4. Similarly, the calculation unit 342 then identifies the magnitude of the impact that compaction at each of the 6th, 7th, ... 108th construction locations has on the 4th construction location P4.

[0025] Then, the identified influence values ​​are accumulated. This accumulated value becomes the influence evaluation point for a single construction site Pn. A positive influence evaluation point indicates that the corresponding construction site is likely to be uplifted by subsequent compaction of the surrounding area. On the other hand, a negative influence evaluation point indicates that the construction site is likely to be subsided by subsequent compaction of the surrounding area. Incidentally, the influence on rubble groups located far from the point where the weight falls is so small that it can be ignored, judging from the (design) acceptable range values. For this reason, as shown in Figure 6, the influence values ​​for cells far from the central cell in the displacement influence map 333 are zero. Also, if the location of a single construction site Pn is far from the location where the surrounding compaction will be performed and is outside the displacement influence map 333, the influence value may be set to zero. For example, in the case of the construction site shown in Figure 7, when calculating the influence evaluation point for construction site P4, for example, there is no problem even if the influence points for construction sites such as the 16th, 17th, 18th to 34th, 35th, 36th to 73rd, 74th, and 75th, which are far away, are not identified. Therefore, for construction sites where it is known in advance that the impact points at a particular construction site Pn cannot be identified, the identification of the impact value is omitted. The calculation of the impact evaluation points at a particular construction site Pn, as explained above, is also performed similarly for each construction site Pn+1...PN that is compacted after the said construction site Pn.

[0026] (Decision section) The determination unit 343 determines the finished height H of the corresponding construction site Pn based on the calculated impact evaluation points. The finished height H is the height of the top surface of the construction site Pn immediately after compaction, when the rubble group at the corresponding construction site Pn is compacted. Specifically, the determination unit 343 determines the finished height H to be a predetermined design height HD plus or minus the amount of displacement due to the effect of compacting the rubble groups at surrounding construction sites. The determination unit 343 comprises a height acquisition unit 343a, a prediction unit 343b, and a selection unit 343c.

[0027] The height acquisition unit 343a acquires the average height Hm of the top surface of each construction site P1 to PN before compacting the rubble stone group. In this embodiment, the height acquisition unit 343a acquires the value entered by the user into the input unit 31 as the average height Hm. In this embodiment, the height acquisition unit 343a also acquires the design height HD and the tolerance E. The design height HD is the target value to be achieved after construction. The tolerance E is the height difference that is allowed to deviate from the design height HD. The height acquisition unit 343a acquires the value entered by the user into the input unit 31 as the design height HD and the tolerance E.

[0028] The prediction unit 343b predicts the distribution of the top height of the rubble mound after compaction of the rubble group at all construction sites P1 to PN for each finishing pattern, based on the average height Hm, design height HD, tolerance E, multiple finishing patterns, and displacement shape data 332. Specifically, the prediction unit 343b provisionally determines the finished height H for each construction site P1 to PN using, for example, four finishing patterns as shown in Figure 9.

[0029] If the influence evaluation point for construction site Pn is positive, the finish height is tentatively determined using finish pattern 1 or 2. On the other hand, if the influence evaluation point for construction site Pn is negative, the finish height H is tentatively determined using finish pattern 3 or 4. For example, the finish height H is tentatively determined by several different combinations of finish patterns, such as using finish pattern 1 for construction sites with a positive influence evaluation point and finish pattern 3 for construction sites with a negative influence evaluation point, using finish pattern 1 for construction sites with a positive influence evaluation point and finish pattern 4 for construction sites with a negative influence evaluation point, using finish pattern 2 for construction sites with a positive influence evaluation point and finish pattern 3 for construction sites with a negative influence evaluation point, or using finish pattern 2 for construction sites with a positive influence evaluation point and finish pattern 4 for construction sites with a negative influence evaluation point.

[0030] After tentatively determining the finished height H for each construction site P1 to PN, the displacement shape data 332 is used to predict the height of the top surface of the surrounding construction sites when each construction site Pn is compacted. This prediction is repeated from the time the first construction site P1 is compacted until the last construction site PN is compacted. When the prediction for the last construction site PN is made is performed, the predicted heights of the top surfaces of the entire construction site, i.e., each construction site P1 to PN, are obtained. The percentage of the predicted heights of each top surface that fall within the allowable range (HD-E to HD+E) is then calculated for each combination of finishing patterns. The combination of finishing patterns with the highest percentage of predicted values ​​that fall within the allowable range is then selected as the combination to be used to calculate the finished height H when actually compacting.

[0031] (Modified control unit) Furthermore, the height acquisition unit 343a of the control unit 34 may be configured to acquire the average height Hm again (accept re-input of the average height Hm by the user) after the selection unit 343c has selected the finished height H (after compacting the rubble group at at least one construction site Pn). The average height Hm acquired again is the average height Hm of the top surface of the remaining construction sites Pn to PN, remeasured after compaction has been actually performed at some of the construction sites P1 to Pn-1. In addition, the selection unit 343c of the control unit 34 may be configured to re-select a finishing pattern according to the re-acquired average height Hm when the height acquisition unit 343a has re-acquired the average height Hm. In this way, the finished height H can be reviewed at any time. As a result, it is possible to prevent the actual average height Hm of the top surface immediately before compaction of each construction site Pn to PN from deviating from the average height Hm measured when the finished height H was initially determined due to the effects of compaction, etc., and as a result the finished height H from being different from the original plan.

[0032] Furthermore, the determination unit 343 of the control unit 34 may be configured to determine the finished height H based on the magnitude of the cumulative value of the influence evaluation points, rather than determining the finished height H based on the finishing pattern.

[0033] [Output Control Unit] The output control unit 344 outputs the finished height H for each construction site P1 to PN determined by the determination unit 343 to the output unit 32. If the output unit 32 is a communication module that transmits data or signals to a display device, a terminal connected to a display device, or the display device itself that displays images, the finished height H for each construction site P1 to PN will be displayed on the display device. The operator of the compaction device 100 will adjust the height at which the weight is dropped by referring to the finished height H displayed on the display device. On the other hand, if the output unit 32 is a communication module that transmits data or signals to the control unit of the crane 1, or a terminal connected to the control unit of the crane 1, the crane 1 will be able to perform operations such as automatically lifting and dropping the weight 2 based on the input finished height H.

[0034] [Effects of information processing equipment] The rubble mound at a construction site Pn, which has been compacted to a predetermined height, will rise or sink each time compaction is performed at surrounding construction sites, due to the influence of that compaction. According to the information processing device described above, the height of the rubble mound at a construction site Pn is set considering the amount of displacement caused by the compaction of the surrounding rubble mounds (lower in areas prone to uplift, and higher in areas prone to sinking). Therefore, when the compaction device 100 performs compaction based on the output of the information processing device 3, after compaction of the construction site Pn and the surrounding construction area is completed, the height of the top of the construction site Pn will settle at the design height HD. Thus, according to the information processing device 3, it becomes possible to construct a rubble mound with a top leveled to a predetermined height without removing the rubble that has been placed or adding rubble later.

[0035] [How to construct a sacrificial mound] Next, I will explain how to construct a rubble mound.

[0036] The method for constructing a rubble mound involves compacting a group of rubble placed on the seabed by striking it from above with a rigid object. As shown in Figure 10, the method for constructing a rubble mound includes a data acquisition step S1, a map creation step S2, a calculation step S3, a determination step S4, and a compaction step S5.

[0037] [Data acquisition steps] In the initial data acquisition step S1, displacement shape data 332 is acquired. In this data acquisition step S1, the displacement shape data 332 is acquired by numerical analysis or measurement. For numerical analysis, for example, the finite element method (FEM) can be used. Specifically, the analysis domain is set to an axisymmetric model with a straight line extending vertically through the center of the weight 2 as the central axis, and a forced vertical downward displacement simulating the fall of weight 2 is applied to the center of the model (corresponding to the construction site where the weight is dropped). Then, the amount of displacement of the surrounding part of the model due to the effect of the forced displacement is analyzed. On the other hand, in the case of measurement, specifically, multiple measurement points are set up in a straight line with horizontal spacing from the point where weight 2 is dropped. Then, the height of the top surface of each measurement point before weight 2 is dropped is obtained by bathymetric surveying. After that, the height of the top surface of each measurement point after weight 2 is dropped is obtained by bathymetric surveying. The difference in the height of the top surface before and after weight 2 is dropped at each measurement point is calculated.

[0038] [Map creation steps] After obtaining the displacement shape data 332, the process moves to the map creation step S2. In the map creation step S2, a displacement effect map 333 is created based on the displacement shape data 332. Specifically, the distance from the point where the weight falls is divided into equal intervals (e.g., 2m), and the amount of displacement in each section is classified into multiple stages (e.g., three stages: "large," "medium," and "small"). The division width may be determined to be equal to the width of the construction area P1 to PN, for example. Then, points are assigned to each classification. Positive points are assigned if the displacement is uplift, and negative points are assigned if the displacement is settlement. For example, a large uplift (settlement) classified as "large" is assigned the largest possible score (e.g., 1 point (-1 point)). A relatively small uplift (settlement) classified as "small" is assigned the smallest possible score (e.g., 0.25 points (-0.25 points)). For moderate uplift (subsidence) classified as "medium," a score midway between the scores assigned to the "large" and "small" classifications (for example, 0.5 points (-0.5 points)) will be assigned. The displacement levels can be set according to the type of rubble and the ground conditions before construction, and may be two levels or four or more levels.

[0039] [Calculation Steps] After creating the displacement impact map 333, the process moves to calculation step S3. In calculation step S3, the displacement impact map 333 is used to calculate impact evaluation points for multiple construction sites, reflecting the construction sequence. The calculation of impact evaluation points can be performed, for example, using the information processing device 3 described above. The specific method for calculating the impact evaluation points is described in the explanation of the calculation unit 342 of the information processing device 3 described above, so the explanation is omitted here. Note that the calculation of impact evaluation points may also be performed using equipment other than the information processing device 3 described above (for example, a dedicated device for creating the displacement impact map 333, a PC with an application for creating the displacement impact map 333 installed, etc.), or it may be performed by a person.

[0040] [Decision Step] After calculating the impact assessment points, the process moves to the decision step S4. In the decision step S4, the finished height H of the corresponding construction area is determined based on the calculated impact assessment points. The decision step S4 according to this embodiment includes a measurement step S41, a prediction step S42, and a selection step S43.

[0041] (Measurement step) In measurement step S41, the average height of the top surface of each construction site before compacting the rubble is measured. The average height can be measured using, for example, a predetermined measuring device (not shown).

[0042] (Prediction step) In prediction step S42, the distribution of the top surface height of the rubble mound after compaction of the rubble mounds at all construction sites is predicted for each finishing pattern, based on the average height, design height, multiple finishing patterns set based on tolerance, and displacement shape data 332. The prediction of the top surface height distribution can be performed, for example, using the information processing device 3 described above. The specific method for predicting the top surface height distribution is as described in the explanation of the prediction unit 343b of the information processing device 3 described above, so the explanation is omitted here. The prediction of the top surface height distribution may also be performed using a device other than the information processing device 3 described above (for example, a device dedicated to predicting the top surface height distribution, a PC with an application for predicting the top surface height distribution installed, etc.), or it may be performed by a person.

[0043] (Selection step) In selection step S43, the finishing pattern that resulted in the highest proportion of construction locations with heights not exceeding the tolerance is selected from among the predicted height distributions, and the finishing height H is determined. The selection of the finishing height H can be performed, for example, using the information processing device 3 described above. The specific method for selecting the finishing height H is described in the description of the selection unit 343c of the information processing device 3 described above, so the explanation is omitted here. Note that the calculation of the impact evaluation points may be performed using a device other than the information processing device 3 described above, or it may be performed by a person.

[0044] [Compacting step] After determining the finished height H, the process moves to compaction step S5. In compaction step S5, the rubble piles at each construction site P1 to PN are struck from above with a rigid object to compact the top surface height of the construction site P1 to PN to the finished height H. Construction sites with a positive impact evaluation point are prone to uplift due to subsequent compaction of the surrounding area. Therefore, construction sites with a positive impact evaluation point will be compacted so that the top surface height is lower than the design height HD. On the other hand, construction sites with a negative impact evaluation point are prone to settlement due to subsequent compaction of the surrounding area. Therefore, construction sites with a negative impact evaluation point will be compacted so that the top surface height is higher than the design height HD. Whether the top surface height is the finished height H is confirmed by bathymetric surveying.

[0045] As this compaction process is carried out sequentially at each construction site P1 to PN, the surrounding construction sites are affected by the compaction. As a result, construction sites with a positive impact evaluation point, where the top surface height is lower than the design height HD, will rise with each repeated compaction. On the other hand, construction sites with a negative impact evaluation point, where the top surface height is higher than the design height HD, will sink with each repeated compaction. When compaction is complete at all construction sites, the top surface height of each construction site P1 to PN will be approximately the design height HD. In other words, a rubble mound with a top surface leveled to the design height HD is constructed.

[0046] [Variations in the construction method of the pitcher's mound] The method for constructing the rubble mound may include a remeasurement step and a reselection step. In the remeasurement step, after compacting the rubble group at at least one construction site Pn, the average height of the top surface of the remaining construction sites Pn+1 to PN is remeasured by actual measurement. The remeasurement of the average height can be performed using the measuring device used in the measurement step S41 above. In the reselection step, a finishing pattern is reselected according to the remeasured average height. The reselection of the finishing pattern can be performed using the means used in the selection step S43 above (such as the information processing device 3 above).

[0047] [Effects of the construction method of the pitcher's mound] The rubble pile at one construction site Pn, which has been compacted to a predetermined height, will rise or sink each time compaction is performed at surrounding construction sites, due to the influence of that compaction. According to the rubble mound construction method described above, the height of the rubble pile at one construction site Pn is set considering the amount of displacement caused by the compaction of the surrounding rubble piles (lower in areas prone to uplift, and higher in areas prone to sinking). Therefore, after compaction of one construction site Pn and all surrounding construction sites is completed, the height of the top of one construction site Pn will settle at the design height. Thus, according to the mound construction method, a rubble mound with a top leveled to a predetermined height can be constructed without removing the rubble that has been placed or adding rubble later.

[0048] [Differentiation] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims.

[0049] For example, some or all of the functions of each of the above control blocks can be implemented by logic circuits. For example, an integrated circuit in which logic circuits functioning as each of the above control blocks are formed is also included in the scope of the present invention. In addition, it is also possible to implement the functions of each of the above control blocks by, for example, a quantum computer.

[0050] Furthermore, each process described in the above embodiments may be performed by AI (Artificial Intelligence). In this case, the AI ​​may operate on the control device described above, or it may operate on other devices (for example, an edge computer or a cloud server).

[0051] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of Symbols]

[0052] 100 Compaction device 1 Crane 2 weight 2a end 3. Information Processing Device 31 Input section 32 Output section 33 Storage section 331 Information Processing Programs 332 Displacement Shape Data 333 Displacement Impact Map 34 Control Unit 341 Data Acquisition Unit 342 Calculation Unit 343 Decision Section 343a Height acquisition unit 343b Prediction section 343c Selection Section 344 Output Control Unit

Claims

1. In a method for constructing a rubble mound, in which a group of rubble placed on the seabed is struck from above with a rigid object to compact the rubble, Using a displacement influence map that shows the magnitude of the influence on the rubble group around the area where the rubble mound is compacted by impact with the rigid object, the construction site of the rubble mound is divided into multiple construction sites, and for one of the construction sites, an influence evaluation point is calculated that shows the magnitude of the influence when the rubble group in the construction sites surrounding the first construction site is compacted, taking into account the construction order for the multiple construction sites. Based on the calculated impact assessment points, the step of determining the height of the top surface of the construction site immediately after compaction of the rubble group at the corresponding construction site is to be the predetermined design height plus or minus the displacement caused by the compaction of rubble groups at surrounding construction sites. The steps include: striking the rubble piles at each construction site from above with the rigid object to compact the top surface of the construction site to a predetermined height; A method for constructing a rubble mound having the following characteristics.

2. The method further includes the step of creating a displacement impact map based on displacement shape data that shows the amount of displacement of the rubble group surrounding the striking point when the rubble group is struck from above with the rigid object, before performing the step of calculating the impact evaluation points. A method for constructing a rubble mound according to claim 1.

3. The method further includes the step of obtaining the displacement shape data by numerical analysis or actual measurement before performing the step of creating the displacement influence map. A method for constructing a rubble mound according to claim 2.

4. In the step of determining the height of the top surface, The steps include measuring the average height of the top surface of each construction site before compacting the rubble, A step of predicting the height distribution of the top surface of the rubble mound after compaction of the rubble mound at all construction sites for each finishing pattern, based on the average height, the design height, the tolerance which is the difference in height that is allowed to deviate from the design height, and the displacement shape data, The steps include selecting the finishing pattern that resulted in the highest proportion of construction locations where the height did not exceed the tolerance from among several predicted height distributions, and determining the height of the top surface, including, A method for constructing a rubble mound according to claim 2 or 3.

5. The step of determining the height of the top surface is: The steps include: compacting the rubble at at least one construction site, and then re-measuring the average height by actual measurement; The steps include: re-selecting a finishing pattern based on the remeasured average height, including, A method for constructing a rubble mound according to claim 4.

6. An information processing device used in the construction of a rubble mound, which involves compacting a group of rubble placed on the seabed by striking it from above with a rigid object, A calculation unit calculates an influence evaluation point for one of the construction sites of the rubble mound, which is divided into multiple construction sites, that shows the magnitude of the influence on the rubble group around the construction site, by using a displacement influence map that shows the magnitude of the influence on the rubble group around the construction site, by taking into account the construction order for the multiple construction sites. Based on the calculated impact assessment points, a determination unit determines the height of the top surface of the construction site immediately after compaction of the rubble group at the corresponding construction site, by adding or subtracting the displacement amount due to the compaction of rubble groups at surrounding construction sites from the predetermined design height. An information processing device equipped with the following features.

7. An information processing program for causing a computer to function as an information processing device according to claim 6, An information processing program for causing a computer to function as the calculation unit and the determination unit.

Images