Construction assistance device for steel sheet piling, construction assistance method for steel sheet piling, wall construction method, management method for steel sheet piling, wall, steel sheet piling, recording medium, and program

Abstract

Provided is a construction assistance device for steel sheet piling, said construction assistance device comprising: an input unit that receives input of a dimension of at least one portion of steel sheet piling; and a determination unit that determines the reusability of the steel sheet piling by comparing the dimension to a prescribed condition.

Description

Steel sheet pile construction support device, steel sheet pile construction support method, wall construction method, steel sheet pile management method, wall, steel sheet pile, recording medium and program

[0001] The present invention relates to a steel sheet pile construction support device, a steel sheet pile construction support method, a wall construction method, a steel sheet pile management method, a wall, a steel sheet pile, a recording medium, and a program.

[0002] Steel sheet piles can be driven into the ground with interlocking joints to create continuous wall structures with watertight and sand-proof properties. These steel sheet piles are widely used not only for semi-permanent permanent structures but also for temporary structures such as earth retaining walls and cofferdams. In the case of temporary structures, the steel sheet piles are removed and, if possible, reused. The feasibility of reuse is determined, for example, by the magnitude of deformation that occurred during construction or during use. Because the main body of steel sheet piles is plate-shaped, large deformation can cause the joints to deform and prevent smooth interlocking, making pouring difficult during construction and reducing the wall structure's ability to prevent the inflow and outflow of soil, groundwater, seawater, and other substances. Therefore, determining whether a pile can be reused based on the magnitude of deformation is important.

[0003] On the other hand, in recent years, the use of systems to support the construction and design of steel sheet piles has been promoted. For example, Patent Document 1 proposes a technology that uses a SLAM technique to measure the underground position of sheet piles, enabling sheet pile insertion work at a desired angle with high precision while checking the inclination angle in real time without the need for skilled engineers at the construction site. Patent Document 2 proposes a technology that determines the layout of sheet pile wall sections using a computer system via the Internet.

[0004] Patent No. 6478305 Publication Special Publication No. 2009-528461

[0005] However, the use of systems like those mentioned above has not progressed in determining whether steel sheet piles can be reused, and reuse is determined based on standards set independently by leasing companies or industry groups, for example. In such cases, standards that are too strict may be set due to the lack of clear conditions for calculating the standards, or there may be little data on the construction history of steel sheet piles on which the standards are based, making it difficult to determine appropriate standards, which can hinder reuse.

[0006] Therefore, the present invention aims to provide a steel sheet pile construction support device, a steel sheet pile construction support method, a wall construction method, a steel sheet pile management method, a wall, a steel sheet pile, a recording medium, and a program that can promote appropriate reuse of steel sheet piles by systematizing the judgment for reuse of steel sheet piles.

[0007] [1] A steel sheet pile construction support device comprising: an input unit that accepts input of dimensions of at least one portion of a steel sheet pile; and a determination unit that determines the reusability of the steel sheet pile by comparing the dimensions with predetermined conditions. [2] The steel sheet pile construction support device according to [1], wherein the input unit further accepts input of construction conditions of the steel sheet pile at the time of reuse, and the determination unit determines the reusability of the steel sheet pile according to the construction conditions. [3] The steel sheet pile construction support device according to [1], further comprising an information generation unit that generates information indicating limit conditions under which the steel sheet pile is maintained in a reusable state when the steel sheet pile is reusable. [4] The steel sheet pile construction support device according to [1], further comprising an information generation unit that generates information indicating repair conditions for making the steel sheet pile reusable or information indicating construction conditions under which the steel sheet pile is reusable when the steel sheet pile is not reusable under at least some construction conditions. [5] The steel sheet pile construction support device according to [1], further comprising: a history collection unit that collects a history of the dimensions; a teacher data generation unit that generates teacher data from the history of the dimensions; and a re-learning unit that re-learns a judgment model for the reusability of the steel sheet pile by using the teacher data. [6] The steel sheet pile construction support device according to [5], wherein the history collection unit collects a history of construction conditions of the steel sheet pile at the time of reuse in addition to the history of the dimensions, and the teacher data generation unit generates the teacher data from the history of the dimensions and the history of the construction conditions. [7] The steel sheet pile construction support device according to [1], further comprising: an information registration unit that registers information including the dimensions as management information of each steel sheet pile, and an output unit that outputs the management information. [8] The steel sheet pile construction support device according to [7], wherein the output unit outputs the management information to be recorded on a recording medium incorporated in each steel sheet pile. [9] The steel sheet pile construction support device according to [1], further comprising an output unit that outputs information indicating a construction order in which the steel sheet piles are arranged in order of the reusability or the reusability decreasing from one end of the wall body to the other end in the extension direction of the wall.

[10] A steel sheet pile construction support method, comprising: a step of measuring dimensions of at least one portion of the steel sheet pile; and a step of determining the reusability of the steel sheet pile by comparing the dimensions with predetermined conditions stored in a server.

[11] A wall construction method, comprising constructing a wall at least in part using steel sheet piles determined to be reusable by the steel sheet pile construction support method according to

[10] .

[12] The wall construction method according to

[11] , wherein the steel sheet piles are arranged from one end of the wall in the extension direction to the other end in order of the reusability or the reusability decreasing.

[13] A steel sheet pile management method, wherein the steel sheet piles determined to be reusable by the steel sheet pile construction support method according to

[10] are preferentially kept.

[14] A wall constructed at least in part using steel sheet piles determined to be reusable by comparing the dimensions of at least one portion with a predetermined condition.

[15] The wall according to

[14] , wherein the steel sheet piles are arranged from one end of the wall in the extension direction to the other end in order of the reusability or the reusability decreasing.

[16] The wall according to

[15] , wherein a recording medium on which management information including the dimensions is recorded is incorporated into the steel sheet piles constituting at least a part of the wall.

[17] A steel sheet pile incorporating a recording medium on which management information is recorded, the management information including dimensions of at least one portion of the steel sheet pile, the reusability of which can be determined by comparing with predetermined conditions.

[18] A recording medium incorporated into a steel sheet pile and on which management information of the steel sheet pile is recorded, the management information including dimensions of at least one portion of the steel sheet pile, the reusability of which can be determined by comparing with predetermined conditions.

[19] A program for causing a computer to realize a function of accepting input of dimensions of at least one portion of the steel sheet pile and a function of determining the reusability of the steel sheet pile by comparing the dimensions with predetermined conditions.

[20] The program according to

[19] , further causing the computer to realize a function of presenting a construction order in which the steel sheet piles are arranged in order of the reusability or the reusability decreasing from one end to the other end in the extension direction of a wall body.

[0008] According to the above configuration, by systematizing the judgment for reuse of steel sheet piles, it is possible to promote the appropriate reuse of steel sheet piles. Specifically, for example, by providing the judgment result of whether or not steel sheet piles can be reused in real time at various locations where used steel sheet piles are measured and photographed, the process of selecting steel sheet piles for reuse can be expedited. In addition, since the judgment can be made based on unified criteria regardless of location and the criteria can be updated by re-learning, it is possible to make detailed judgments according to construction conditions, etc., and to improve the accuracy of the judgment by reflecting the driving results of reused steel sheet piles.

[0009] FIG. 1 is a diagram schematically illustrating a steel sheet pile construction support method according to an embodiment of the present invention. FIG. 2 is a flowchart illustrating a determination process and a relearning process of a server in the example shown in FIG. 1. FIG. 3 is a block diagram illustrating components that execute the process shown in FIG. 2. FIG. 4 is a flowchart illustrating an information inquiry process of a server in the example shown in FIG. 1. FIG. 5 is a block diagram illustrating components that execute the process shown in FIG. 4. FIG. 6 is a diagram for explaining an example of a deformation amount of a steel sheet pile. FIG. 7 is a diagram for explaining an example of a deformation amount of a steel sheet pile. FIG. 8 is a diagram for explaining an example of a deformation amount of a steel sheet pile. FIG. 9 is a diagram conceptually illustrating an example of determining reusability by comparing the dimensions of a steel sheet pile with predetermined conditions. FIG. 10 is a diagram conceptually illustrating an example of comparing the dimensions of a steel sheet pile with predetermined conditions and further determining reusability according to construction conditions at the time of reuse. FIG. 11 is a diagram conceptually illustrating an example of generating information indicating limit conditions under which a steel sheet pile is maintained in a reusable state. FIG. 12 is a diagram illustrating an example of a determination result that is output.

[0010] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and drawings, components having substantially the same functional configurations are designated by the same reference numerals, and redundant description will be omitted.

[0011] FIG. 1 is a diagram illustrating a construction support method for steel sheet piles according to an embodiment of the present invention. In the illustrated example, first, dimensions of at least one portion of a used steel sheet pile are acquired. More specifically, an operator measures the dimensions of the steel sheet pile or takes an image of the steel sheet pile. Note that the dimensions do not necessarily have to be acquired for all steel sheet piles. The measured dimensions are input, for example, as numerical values ​​into a terminal device and transmitted to a server 10 via a network. The captured image is converted into numerical values ​​of the steel sheet pile dimensions by image analysis in the terminal device, or transmitted directly to the server 10 as image data. When the image data is transmitted to the server 10, the server 10 performs image analysis to calculate the dimensions of the steel sheet pile from the image data including the steel sheet pile. The server 10 determines whether the steel sheet pile can be reused by a process described below, and the determination result is output to the terminal device via a network.

[0012] The assessment results may be output in real time to the same terminal device used to perform the measurements and photography, or may be output to a terminal device for an administrator located in a different location from where the measurements and photography were performed, or may be stored in the server 10 and read out as needed. For example, when the assessment results are output in real time, the assessment results can be used even without information identifying each steel sheet pile. On the other hand, if an ID or the like is assigned and recorded to identify each steel sheet pile, the input information and assessment results can be stored, and the assessment results for any steel sheet pile can be queried at any time.

[0013] FIG. 2 is a flowchart showing the determination process of the server in the example shown in FIG. 1 . FIG. 3 is a block diagram showing the components that execute the process shown in FIG. 2 . In the server 10 that functions as a steel sheet pile construction support device, a computer operates according to a program and implements the functions of each unit as described below. Note that the program may be pre-stored in the computer's memory, read from a removable recording medium, or downloaded via a network. The functions of the server 10 do not necessarily have to be implemented by a single server device that communicates with a terminal device. For example, the functions of the server 10 may be implemented by cooperation between a server device that communicates with a terminal device and another server device that communicates with the server device via the Internet or the like.

[0014] First, the input unit 110 receives input of data indicating the dimensions of at least one portion of the used steel sheet pile. As already mentioned, this processing may be a processing to receive input of directly measured numerical values ​​of the steel sheet pile dimensions, or a processing to calculate the dimensions of the steel sheet pile by image analysis of image data of the steel sheet pile. Therefore, the information input to the input unit 110 may be data directly indicating the dimensions, such as numerical values, or data that can be used to calculate the dimensions, such as image data. In this specification, both cases are treated as input of the dimensions of the steel sheet pile. Here, the input dimensions of at least one portion of the steel sheet pile may be, for example, dimensions indicating the two-dimensional shape of the steel sheet pile cross section, or dimensions indicating the three-dimensional shape of the entire steel sheet pile, specifically, dimensions indicating the deformation amounts, such as warpage, bending, and torsion, as described below.

[0015] Next, the determination unit 120 determines whether the steel sheet pile can be reused by comparing the input dimensions of the steel sheet pile with predetermined conditions. The determination of whether the steel sheet pile can be reused can be performed, for example, by comparing the deformation amount of the steel sheet pile with a threshold value. The deformation amount of the steel sheet pile may be measured directly, or the deformation amount may be calculated from the measured dimensions of the steel sheet pile. Even if the determination is based on a simple threshold value of the deformation amount, the determination can be performed by the server 10, even if the criteria are not known at the site where the dimensions of the steel sheet pile are measured or images are taken. It is also easy to set criteria categorized by the length, thickness, cross-sectional shape, etc. of the steel sheet pile. The determination of whether the steel sheet pile can be reused can also be performed, for example, by comparing one or more parameters calculated from the deformation amount with a threshold value.

[0016] Furthermore, the determination unit 120 may determine whether the steel sheet pile is reusable based on the construction conditions of the steel sheet pile at the time of reuse. Whether the steel sheet pile is actually reusable may also depend on the construction conditions. For example, when the steel sheet pile is driven into soft ground at the time of reuse, even if the current deformation amount is relatively large, the deformation amount is unlikely to increase during construction, so reuse may be possible. On the other hand, when the steel sheet pile is driven into hard ground at the time of reuse, even if the current deformation amount is relatively small, the deformation amount may increase during construction, making reuse difficult. Therefore, the server 10 may accept input of the construction conditions of the steel sheet pile at the time of reuse via the input unit 110, and the determination unit 120 may determine whether the steel sheet pile is reusable based on different criteria depending on the construction conditions. More specifically, for example, the reusability of the steel sheet pile may be determined by comparing one or more parameters calculated from the deformation amount and the construction conditions with a threshold value.

[0017] After the processing by the determination unit 120, the processing by the information generation units 130A and 130B is executed as necessary. When the determination unit 120 determines that the steel sheet pile is reusable, the information generation unit 130A generates information indicating the limit conditions under which the reusable state is maintained. The limit conditions are, for example, the number of times the steel sheet pile can be reused. When the deformation amount is used to determine whether the steel sheet pile is reusable, the number of times the steel sheet pile can be reused can be calculated by dividing the difference between the current deformation amount and the deformation amount at which the steel sheet pile becomes unreusable by the predicted deformation amount per reuse. Alternatively, the limit conditions may include the construction conditions when the steel sheet pile is reused as a premise. This makes it possible to express, for example, a state in which the steel sheet pile can be reused three more times on soft ground and two more times on hard ground. Soft ground and hard ground may be represented, for example, by a range of N values. The limit conditions do not necessarily have to be the number of times the steel sheet pile can be reused, but may also be construction conditions under which the steel sheet pile can be reused. For example, information indicating the N-value and driving depth of reusable ground may be generated. Furthermore, for example, when driving a plurality of steel sheet piles in a longitudinal joint, information indicating that a preceding steel sheet pile driven in a deep position cannot be reused but a subsequent steel sheet pile driven in a shallow position can be reused may be generated.

[0018] When the determining unit 120 determines that the steel sheet pile is not reusable under at least some construction conditions, the information generating unit 130B generates information indicating repair conditions for making the steel sheet pile reusable. The repair conditions include, for example, the type of correction of the steel sheet pile and the amount of deformation that needs to be reduced by the correction. For example, when determining whether the steel sheet pile is reusable by comparing a parameter calculated from one or more deformation amounts with a threshold, the information generating unit 130B may generate information regarding the type of correction for correcting the deformation amount that most affects the parameter or the amount of reduction in the deformation amount required to bring the parameter within a range defined by the threshold. Alternatively, when the steel sheet pile is reusable under some construction conditions, the information generating unit 130B may generate information indicating construction conditions for reusability. In this case, for example, information indicating the N value of the ground and the driving depth at which concrete can be driven may be generated as construction conditions. Furthermore, for example, when multiple steel sheet piles are driven in a longitudinal joint, information indicating that a preceding steel sheet pile driven at a deep position is not reusable but a subsequent steel sheet pile driven at a shallower position is reusable may be generated.

[0019] The output unit 140 outputs the determination result by the determination unit 120 and the information generated by the information generation units 130A and 130B. For example, the output unit 140 may output a list display of multiple steel sheet piles as the determination result, as in the example described below. Furthermore, the output unit 140 may output information indicating the construction order in which the steel sheet piles are arranged from one end of the wall to the other end in order of reusability or in order of lowest reusability. The output unit 140 may output various information, such as the reusability, marginal conditions, repair conditions, and management information of the steel sheet piles. As already mentioned, the output unit 140 may output information to the same terminal device that input the information to the input unit 110, or to a terminal device different from the terminal device that input the information. Alternatively, the output unit 140 may output information to a recording device of the server 10 or an external device, and the information may be stored in the recording device. The stored information can be read and output at any time, and can also be referenced as a history in the information reference process described below.

[0020] 2 also shows a re-learning process in the server 10. The re-learning process is a process of re-learning a determination model for determining whether a steel sheet pile is reusable or not, for example, by using a history of dimensions of the steel sheet pile input to the server 10. The server 10 does not necessarily have to have the re-learning process, but the accuracy of the determination can be improved by the re-learning process.

[0021] In the re-learning process, the history collecting unit 150 collects the history of dimensions and construction conditions based on the driving results of the steel sheet piles. The history collecting unit 150 may collect, for example, the history of dimensions before and after construction for each steel sheet pile, or the history of construction conditions. These data may have been previously input via the input unit 110. The history collecting unit 150 may also collect the history of parameters calculated from the dimensions of the steel sheet piles, parameters calculated from the construction conditions, or parameters calculated from a combination of the dimensions of the steel sheet piles and the construction conditions. These parameters may have been previously calculated by the determining unit 120. Even when collecting such parameters, the history collecting unit 150 indirectly collects the history of dimensions or construction conditions. The training data generating unit 160 generates training data from data including the collected history, and the re-learning unit 170 re-learns the model using the generated training data. In this embodiment, the determination unit 120 can determine whether a steel sheet pile can be reused by using, for example, a model that predicts the deformation of the steel sheet pile when it is reused, based on the current deformation of the steel sheet pile. As described above, by performing retraining using training data that reflects the dimensional changes of the steel sheet pile before and after actual reuse, the accuracy of the model can be improved, thereby more accurately predicting the deformation of the steel sheet pile after reuse and appropriately determining whether it can be reused. When the determination unit 120 makes a determination based on the construction conditions of the steel sheet pile, training data may be generated and the model may be retrained for each construction condition. Alternatively, a model that inputs the construction conditions in addition to the current deformation of the steel sheet pile may be used.

[0022] FIG. 4 is a flowchart illustrating the information query process of the server in the example illustrated in FIG. 1 . FIG. 5 is a block diagram illustrating components that execute the process illustrated in FIG. 4 . As already mentioned, in this embodiment, the server 10 may output the judgment results in real time, or may store input information and judgment results and make them available for query at any time. In this case, the server 10 may identify individual steel sheet piles and store and query information as management information for each steel sheet pile. In the information query process, the information acquisition unit 180 acquires information about each steel sheet pile. The acquired information is similar to the information collected by the history collection unit 150 in the relearning process, such as information input via the input unit 110 and parameters calculated by the judgment unit 120, and includes the dimensions and construction condition history of the steel sheet pile. The information registration unit 190 registers the acquired information in the database 191 as management information for each steel sheet pile. The information linking unit 200 associates and records the management information registered in the database 191 with previously registered management information. The output unit 210 outputs the management information registered in the database 191. Similar to the output of information in the above-described determination process, the management information may be output to a terminal device or a recording device. In addition, the output unit 210 may output the management information to be recorded on a recording medium incorporated in each steel sheet pile.

[0023] As a recording medium to be incorporated into a steel sheet pile, for example, a label described in International Publication No. 2024 / 076299 can be used. This label can read identification information of the steel member to which the label is attached by optical code reading and near-field communication (NFC). For example, a recording medium such as this label may record the above-mentioned management information, specifically, the dimensions of at least one portion of the steel sheet pile whose reusability can be determined by comparing it with predetermined conditions. This is not limited to the above label example; various recording media that can be incorporated into a steel sheet pile can also be used. A recording medium on which such management information is recorded and a steel sheet pile incorporating such a recording medium are also included in embodiments of the present invention.

[0024] 6 to 8 are diagrams illustrating examples of deformation amounts of steel sheet piles. Figure 6 shows the warpage deformation amount d1 of the steel sheet pile, which is deformation in a direction perpendicular to the surface of the wall formed by the steel sheet pile. The warpage deformation amount d1 is measured, for example, as the distance between a line passing through both ends of the steel sheet pile in the vertical direction and the part of the steel sheet pile that is farthest from the line in the middle of the steel sheet pile. Figure 7 shows the bending deformation amount d2, which is deformation in a direction parallel to the surface of the wall formed by the steel sheet pile and perpendicular to the height direction of the steel sheet pile (the horizontal direction at the time of driving). The bending deformation amount d2 is measured, for example, as the distance between a line passing through both ends of the steel sheet pile in the vertical direction and one end in the width direction and the part of the steel sheet pile that is farthest from the line in the middle of the steel sheet pile. Figure 8 shows the torsional deformation amount d3, which is the distance between the remaining corner and the plane when three of the four corners of the steel sheet pile (both ends in the vertical direction and the width direction) are positioned on the same plane. As described above, in this embodiment, whether or not a steel sheet pile is reusable may be determined by comparing the deformation amount of such a steel sheet pile or a parameter calculated from multiple deformation amounts with a threshold value.

[0025] According to the embodiment of the present invention described above, by systematizing the judgment for reuse of steel sheet piles using the server 10, it is possible to promote the appropriate reuse of steel sheet piles. Specifically, for example, by providing the judgment result of whether or not steel sheet piles can be reused in real time at various locations where used steel sheet piles are measured and photographed, the process of selecting steel sheet piles for reuse can be expedited. Furthermore, since the judgment can be made based on uniform criteria regardless of location and the criteria can be updated by re-learning, it is possible to make detailed judgments according to construction conditions, etc., and to improve the accuracy of the judgment by reflecting the driving results of reused steel sheet piles.

[0026] In the above example, the determination of the reusability of the steel sheet pile is performed as a binary determination of whether the steel sheet pile is reusable or not. However, the embodiment of the present invention is not limited to such an example. For example, a score indicating the reusability of the steel sheet pile may be calculated from the deformation amount of the steel sheet pile or the magnitude of the difference between the deformation amount of the steel sheet pile and a threshold value of a parameter calculated from the deformation amount and the construction conditions. The reusability of the steel sheet pile may be determined by further comparing this score with a threshold value, or the score itself may be output as the reusability of the steel sheet pile. Furthermore, when a score is calculated in which a higher score indicates smaller deformation, multiple steel sheet piles may be ranked in order of reuse priority, i.e., in descending order of the score, i.e., the highest reusability.

[0027] An embodiment of the present invention includes a wall constructed with steel sheet piles whose reusability has been determined. The wall does not necessarily need to be entirely composed of steel sheet piles whose reusability has been determined, as long as at least a portion of the steel sheet piles whose reusability has been determined are used. A recording medium having the management information described above recorded thereon may be incorporated into the steel sheet piles whose reusability has been determined. When the above-described score is calculated as the reusability, during construction of the wall, the steel sheet piles can be arranged from one end of the wall to the other end in order of reusability or reusability. This allows, for example, steel sheet piles with low reusability, i.e., steel sheet piles that are close to the limit of reusability and are relatively likely to become unusable after the next extraction, to be gathered together, thereby facilitating the management of the steel sheet piles after extraction. Furthermore, steel sheet piles with low reusability may require careful installation during installation. Construction is easier when such steel sheet piles are gathered together rather than scattered. An embodiment of the present invention also includes a steel sheet pile management method that prioritizes the retention of steel sheet piles whose reusability has been determined and that have been determined to be reusable.

[0028] Although the illustrated example illustrates a hat-shaped cross-section steel sheet pile, the embodiment of the present invention is not limited to the hat-shaped cross-section and can be used to determine whether or not steel sheet piles of various cross-sections such as U-shaped, Z-shaped, and straight steel sheet piles can be reused. Even for hat-shaped and other cross-section steel sheet piles, which are used less in temporary structures than U-shaped ones, systemization can unify the judgment criteria and reflect the results of many installations in the judgment criteria, thereby promoting the appropriate reuse of steel sheet piles.

[0029] Further specific examples of embodiments of the present invention will be described below.

[0030] FIG. 9 is a conceptual diagram illustrating an example of determining reusability by comparing the dimensions of a steel sheet pile with predetermined conditions. Specific examples of steel sheet pile dimensions are shown in Table 1 below. For one or more of these steel sheet pile dimensions, a reusability range can be set using upper and lower limit values, or either an upper or lower limit value. For example, if a dimension is too large or too small relative to a predetermined value, it may be difficult to fit a joint, preventing the wall from functioning properly. In this case, if the dimensions of the steel sheet pile are within the reusable range (Steel Sheet Pile 1), it is determined to be reusable. If the dimensions of the steel sheet pile are not within the reusable range (Steel Sheet Pile 2 and Steel Sheet Pile 3), it is determined to be unreusable. When determining reusability based on multiple dimensions, a steel sheet pile is determined to be reusable if all dimensions are within the reusable range. In the illustrated example, the steel sheet pile is determined to be either OK or NG. However, a score may be calculated that decreases as the pile approaches the upper or lower limit of the reusable range, and the higher the score, the more likely the pile is to be reusable. When calculating scores for multiple dimensions, the average of the scores calculated for each dimension may be output, or the lowest score may be output as a representative value. Furthermore, values ​​of construction conditions that indicate two or more attributes may be used, such as the product of the rated output and driving time of a vibro hammer, which is similar to the integrated current value (the product of the current value of an excavator and the excavation time) used in pile construction management.

[0031]

[0032] Table 1 also shows specific examples of construction conditions. Construction machines such as a vibro hammer, a press-in machine, or a diesel hammer are used to drive steel sheet piles. When a vibro hammer or a press-in machine is used, one or more of the construction conditions shown in Table 1 can be used. When a diesel hammer is used, the ram-related construction conditions shown in Table 1 can be used. A water jet is used to facilitate the penetration of the steel sheet pile by injecting water into the ground. When a water jet is used to drive the steel sheet pile, the water jet-related construction conditions can be used in addition to the construction machine-related conditions described above. An earth auger is used to facilitate the penetration of the steel sheet pile by excavating an area adjacent to the steel sheet pile, specifically the inside of the web of a hat-shaped steel sheet pile or a U-shaped steel sheet pile. When an earth auger is used to drive the steel sheet pile, the earth auger-related construction conditions can be used in addition to the construction machine-related conditions described above. Construction conditions such as driving time, the N value of the ground, and the tip depth can be used in common regardless of the construction machine used. The number of times of driving indicates, for example, how many times the reused steel sheet pile is driven.

[0033] FIG. 10 is a conceptual diagram illustrating an example of comparing the dimensions of a steel sheet pile with predetermined conditions and determining reusability based on the construction conditions at the time of reuse. In the illustrated example, the deformation amount after reuse is predicted based on the current dimensions of the steel sheet pile and the construction conditions. If the current dimensions of the steel sheet pile are within the reusable range, the construction conditions of the steel sheet pile at the time of reuse are input, and it is determined whether the dimensions, plus the predicted deformation amount based on the construction conditions, are within the reusable range. In the case of construction condition A (Case A), the dimensions after construction are also within the reusable range, so it is determined that the steel sheet pile is reusable (OK). On the other hand, in the case of construction condition B (Case B), the dimensions after construction are not within the reusable range, so it is determined that the steel sheet pile is not reusable (NG). Note that for simplicity, an example in which the deformation amount increases linearly with the construction condition parameters is shown. However, the relationship between the construction conditions and the deformation amount may be expressed by a higher-order function or a nonlinear function such as an exponential function or a trigonometric function. Furthermore, depending on the construction conditions, the deformation amount may decrease with respect to the parameters, i.e., change in the opposite direction from the case of other construction conditions.

[0034] FIG. 11 is a conceptual diagram illustrating an example of generating information indicating the limit conditions under which a steel sheet pile can be maintained in a reusable state. In the illustrated example, the deformation amount after reuse is predicted from the current dimensions of the steel sheet pile, as in FIG. 10 above. However, if the deformation amount does not exceed the reusable range in a single construction, the number of similar constructions required to perform the same construction is determined. In the illustrated example, the deformation amount is within the reusable range up to the third construction, so three constructions is identified as the limit construction condition for the steel sheet pile, specifically, the number of times it can be reused. For example, if the construction conditions, such as the N value of the ground, change, the relationship between the construction conditions and the deformation amount (for example, the slope of the line in the illustrated example) also changes. Therefore, it is possible to express a state in which the steel sheet pile can be reused three more times if the ground is soft, and two more times if the ground is hard, as in the example already described.

[0035] The functions representing the relationship between the construction conditions and the deformation amount shown in the examples of Figures 10 and 11 may be updated by the relearning process as described above. A function to be used may be selected depending on the type of steel sheet pile, such as a hat-shaped, U-shaped, Z-shaped, or straight steel sheet pile. Furthermore, a function to be used depending on another construction condition may be selected from a plurality of functions representing the relationship between a certain construction condition and the deformation amount. Specifically, for example, a function representing the relationship between the construction conditions related to a vibro hammer and the deformation amount may be selected depending on construction conditions related to the ground, such as the N value.

[0036] 12 is a diagram showing an example of the output determination result. In the illustrated example, the determination results of whether or not a plurality of steel sheet piles are reusable are displayed in a list. In addition to the ID of the steel sheet pile and whether or not it is reusable, the list may also display the dimensions of the steel sheet pile and the reusable range of the dimensions, as in the illustrated example. Such determination results may be displayed on the screen of a terminal device, for example, or may be printed and output. Furthermore, the determination results may be accumulated and referenced as a history.

[0037] 10...server, 110...input unit, 120...judgment unit, 130A, 130B...information generation unit, 140...output unit, 150...history collection unit, 160...teacher data generation unit, 170...relearning unit, 180...information acquisition unit, 190...information registration unit, 191...database, 200...information linking unit, 210...output unit.

Claims

1. A steel sheet pile construction support device comprising: an input unit that receives input of dimensions of at least one portion of a steel sheet pile; and a determination unit that determines the reusability of the steel sheet pile by comparing the dimensions with predetermined conditions.

2. The steel sheet pile construction support device of claim 1, wherein the input unit further accepts input of construction conditions for the steel sheet pile at the time of reuse, and the judgment unit judges the reusability of the steel sheet pile according to the construction conditions.

3. A steel sheet pile construction support device as described in claim 1, further comprising an information generation unit that generates information indicating limit conditions under which the steel sheet pile can be maintained in a reusable state when the steel sheet pile is reusable.

4. A steel sheet pile construction support device as described in claim 1, further comprising an information generation unit that generates information indicating repair conditions for making the steel sheet pile reusable, or information indicating construction conditions under which the steel sheet pile can be reused, when the steel sheet pile is not reusable under at least some of the construction conditions.

5. A steel sheet pile construction support device as described in claim 1, further comprising: a history collection unit that collects the history of the dimensions; a teacher data generation unit that generates teacher data from the history of the dimensions; and a re-learning unit that uses the teacher data to re-learn a judgment model for the reusability of the steel sheet pile.

6. A steel sheet pile construction support device as described in claim 5, wherein the history collection unit collects the history of the dimensions as well as the history of the construction conditions of the steel sheet pile when it is reused, and the teacher data generation unit generates the teacher data from the history of the dimensions and the history of the construction conditions.

7. The steel sheet pile construction support device according to claim 1, further comprising: an information registration unit that registers information including the dimensions as management information for each steel sheet pile; and an output unit that outputs the management information.

8. The steel sheet pile construction support device according to claim 7, wherein the output unit outputs the management information for recording on a recording medium incorporated in each of the steel sheet piles.

9. A steel sheet pile construction support device as described in claim 1, further comprising an output unit that outputs information indicating the construction order in which the steel sheet piles are arranged in order of the highest or lowest reusability from one end of the wall body to the other end in the extension direction of the wall body.

10. A method for supporting construction of steel sheet piles, comprising: a step of measuring the dimensions of at least one portion of a steel sheet pile; and a step of determining the reusability of the steel sheet pile by comparing the dimensions with predetermined conditions recorded in a server.

11. A wall construction method, in which a wall is constructed using at least a portion of steel sheet piles determined to be reusable by the steel sheet pile construction support method according to claim 10.

12. A wall construction method as described in claim 11, wherein the steel sheet piles are arranged in order of the possibility of reusing or the possibility of reusing from one end of the wall to the other end in the extension direction of the wall.

13. A method for managing steel sheet piles, which prioritizes the retention of steel sheet piles determined to be reusable by the steel sheet pile construction support method described in claim 10.

14. A wall constructed at least in part using steel sheet piles whose reusability has been determined by comparing the dimensions of at least one portion with predetermined conditions.

15. A wall as described in claim 14, wherein the steel sheet piles are arranged in order of the possibility of reusing or the possibility of reusing from one end of the wall to the other end in the extension direction of the wall.

16. A wall structure according to claim 15, wherein a recording medium on which management information including the dimensions is recorded is incorporated in the steel sheet pile that constitutes at least a part of the wall structure.

17. A steel sheet pile incorporating a recording medium on which management information is recorded, wherein the management information includes dimensions of at least one portion of the steel sheet pile whose reusability can be determined by comparing it with predetermined conditions.

18. A recording medium that is incorporated into a steel sheet pile and records management information for the steel sheet pile, the management information including dimensions of at least one portion of the steel sheet pile that can be compared with predetermined conditions to determine whether it can be reused.

19. A program for enabling a computer to perform the following functions: accepting input of dimensions of at least one portion of a steel sheet pile; and determining the reusability of the steel sheet pile by comparing the dimensions with predetermined conditions.

20. The program described in claim 19, further causing the computer to realize a function of presenting a construction order in which the steel sheet piles are arranged in order of the highest or lowest reusability from one end of the wall to the other end in the extension direction of the wall.

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