JP7157498B1 - CONSTRUCTION SUPPORT METHOD, CONSTRUCTION SUPPORT PROGRAM, AND CONSTRUCTION SUPPORT DEVICE - Google Patents

Abstract

Kind Code: A1 A construction support method capable of seamlessly performing work from design to construction of reinforcing bars at low cost is provided. SOLUTION: Three-dimensional model information related to the three-dimensional model is created by using central dimension information in millimeters and outer surface dimension information in centimeters of the curved reinforcement as parameters related to the three-dimensional model of the curved reinforcement. and a reinforcing bar fabrication information creating step of creating reinforcing bar fabrication information based on the three-dimensional model information. At least in the three-dimensional model information creating step, the three-dimensional model information including center dimension information to create [Selection drawing] Fig. 7

Description

The present invention relates to, for example, a construction support method, a construction support program, and a construction support device for supporting construction of reinforcing bars.

In recent years, it has been proposed to use BIM (Building Information Modeling) when constructing buildings, complex facilities, and the like. In BIM, parts are combined in a virtual space, and various information such as the weight of reinforcing bars and the completion time of construction is incorporated into a modeled building.

For example, in Patent Document 1, by creating a three-dimensional bar arrangement model from a two-dimensional CAD drawing, it is possible to create a construction drawing in which a three-dimensional interference check for reinforcing bars to be arranged is performed in advance. disclosed.

JP 2011-253484 A

By the way, in a building made of reinforced concrete, a large number of reinforcing bars of various shapes are used. In addition, many business operators, such as design companies (including architectural design offices), construction sites, and reinforcing bar processors, are involved in the process from design to processing of reinforcing bars.

For example, a reinforcement arrangement diagram and a summary table created by a design company are handed over to a construction site, and work is performed at the construction site to create a workbook from the reinforcement arrangement diagram and the summary table. Further, the construction site gives the processing book to the reinforcing bar processor, who then converts the processing book into a two-dimensional code (also called a “QR code (registered trademark)”). A reinforcing bar processing company reads a two-dimensional code into a reinforcing bar processing machine and processes the reinforcing bar based on the information of the two-dimensional code. Various kinds of processed reinforcing bars are delivered from a reinforcing bar processor to a construction site in a predetermined number.

In each process related to the supply of such reinforcing bars, the representation of the dimensions of the reinforcing bars and information related to numerical units (information related to numerical expression) is converted so that the work can be performed smoothly in each process. It is Information conversion is performed manually, and information is divided between processes.

The manual conversion of information is performed, for example, for the purpose of changing the numerical expression in the three-dimensional data to a numerical expression that workers at construction sites and reinforcing bar processing companies are accustomed to handling. Conventionally, there have been cases where man-hours for information conversion have been required and costs have increased, human error has occurred, and various estimated numerical values such as weight and price have been inaccurate.

An object of the present invention is to provide a construction support method, a construction support program, and a construction support device that can seamlessly perform work from design to construction of reinforcing bars at low cost.

(1) A feature of the construction support method according to the present invention is a construction support method for buildings using Building Information Modeling (BIM),
As parameters related to the three-dimensional model of the bending reinforcing bar, using center dimension information in units of millimeters of the bending reinforcing bar and outer surface dimension information in units larger than the unit of millimeters,
a three-dimensional model information creating step of creating three-dimensional model information relating to the three-dimensional model;
a reinforcing bar manufacturing information creating step of creating reinforcing bar manufacturing information based on the three-dimensional model information;
At least in the three-dimensional model information creating step, the three-dimensional model information is created including the center dimension information.
(2) A feature of the construction support method according to the present invention is that at least in the reinforcing bar manufacturing information creation step, the reinforcing bar manufacturing information is created including the outer surface dimension information,
A reinforcing bar manufacturing information output step is provided for converting the reinforcing bar manufacturing information into a read code readable by a reading device and outputting the same.
(3) The construction support method according to the present invention is characterized by: a length calculation step of calculating length information of the bent reinforcing bar using the center dimension information;
and a weight calculation step of calculating weight information of the bent reinforcing bar based on the length information.
(4) A feature of the construction support program according to the present invention is that it causes a computer to execute any one of the above construction support methods (1) to (3).
(5) A feature of the construction support apparatus according to the present invention is that it executes any one of the construction support methods of (1) to (3) or the construction support program of (4).

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the construction assistance method, construction assistance program, and construction assistance apparatus which can supply a reinforcing bar seamlessly and at low cost.

It is explanatory drawing which shows the flow of the information in a construction support system. It is explanatory drawing which shows an example of a three-dimensional model, a bar arrangement diagram, and a summary table. (a), (b) is explanatory drawing which shows the example of a reinforcing-bar fitting diagram. It is a block diagram which shows the structure of a construction assistance apparatus roughly. 4 is a chart showing an example of a reinforcing bar object; FIG. 4 is an explanatory diagram showing an input example of a parameter and an example of a numerical chart corresponding to the input parameter; (a) is an explanatory view showing the center dimension of a U-shaped reinforcing bar, and (b) is an explanatory view showing the outer surface dimension and inner surface dimension of the reinforcing bar of (a). (a) is an explanatory view showing the center dimension of a bent portion by enlarging it, and (b) is an explanatory view showing the center line of a U-shaped reinforcing bar with reference numerals attached to each part. (a) is a diagram showing an example of a summary table showing the length of each part of a U-shaped reinforcing bar by the outer surface dimension, and (b) similarly shows the length of each part of the U-shaped reinforcing bar by the center dimension. FIG. 11 is a chart showing an example of a summary table; FIG. It is explanatory drawing which shows the U-shaped reinforcing bar represented by changing the bending part into the shape of a right angle. (a) is an explanatory diagram schematically showing the classification of the three-dimensional model of the bending reinforcing bar, (b) is an explanatory diagram schematically showing the first bending reinforcing bar information, and (c) is the first bending reinforcing bar information and the second bending reinforcing bar information. It is explanatory drawing which shows reinforcing-bar information roughly.

Preferred embodiments of the present invention will be described in detail below with reference to the drawings. In addition, in this embodiment and the drawings according to this embodiment, constituent elements with the same reference numerals have the same structure or function.

<Basic Configuration of Construction Support System 10>
FIG. 1 schematically shows the configuration of a construction support system 10 according to one embodiment of the invention. The construction support system 10 includes a data supply section 12 , a construction section 14 and a processing section 16 . Examples of the data supply unit 12 include an information system company, an architectural design office, and the like.

The construction unit 14 may include a construction site where construction of a building to be constructed (hereinafter referred to as a “target building”, etc.) is performed. Examples of the processing unit 16 include a reinforcing bar processor that bends reinforcing bars upon receiving an order from the construction unit 14 and delivers the manufactured reinforcing bars to the construction unit 14 .

The data supply unit 12 uses a BIM (Building Information Modeling) software program (construction support program, hereinafter referred to as a "BIM program") to generate data from the BIM model as shown in FIG. , the creation of bar arrangement diagrams and summary tables, and the creation of workbooks. The data supply unit 12 also creates a two-dimensional code (also called “QR code (registered trademark)”). Specific information (data) handled by the data supply unit 12 will be described later.

FIG. 2 shows an example of various information created in the data supply unit 12. As shown in FIG. FIG. 2 shows a three-dimensional model (BIM model) 22 relating to reinforcing bars of a building, a bar arrangement drawing 24 created from the three-dimensional model, and a summary table 26 created based on the bar arrangement drawing 24. It is The three-dimensional model 22, bar arrangement diagram 24, and summary table 26 shown in FIG. 2 are merely examples. In the data supply unit 12, various models other than those illustrated can be created as the three-dimensional model 22, the bar arrangement diagram 24, and the summary table 26. FIG.

FIGS. 3(a) and 3(b) show an example of a reinforcing bar arrangement diagram (a building at a beam-column joint) created based on this information. The three-dimensional model 22 in FIG. 2 and the building shown in the reinforcing bar arrangement diagrams in FIGS. A "project" is a model of a target building.

In the data supply unit 12, it is possible to use a general personal computer (hereinafter referred to as "PC") equipment as the construction support device 30 (FIG. 4). The construction support device 30 is communicably connected to management computers (not shown) of the construction section 14 and the processing section 16 (FIG. 1) via a communication network (not shown). Examples of communication networks include the Internet, LANs, WANs, public telephone lines, base stations, mobile communication networks, and those interconnected via gateways (including so-called clouds).

As shown in FIG. 4, the construction support device 30 internally includes a control unit 31, a storage unit 32, a communication unit 33, etc., and an operation unit 34, a display unit 35, etc. as peripheral devices.

Although not shown, the control unit 31 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The CPU of the control unit 31 develops various computer programs stored in the ROM and the storage unit 32 on the RAM and executes them. The control unit 31 may be an arbitrary processing circuit or arithmetic circuit including multiple CPUs, a multi-core CPU, a GPU (Graphics Processing Unit), a microcomputer, a volatile or non-volatile memory, or the like.

The control unit 31 includes a three-dimensional model creation unit 36, a bar arrangement drawing creation unit 37, a summary table creation unit 38, a reinforcing bar information calculation unit 39, a two-dimensional code creation unit 40, and the like. The three-dimensional model creation unit 36 creates information for the three-dimensional model 22 shown in FIG. The bar arrangement drawing creation unit 37 creates information for the bar arrangement drawing 24 (Fig. 2), and the summary table creation unit 38 creates the information for the summary table (Figs. 2, 9(a), (b)). create information.

The reinforcing bar information calculation unit 39 calculates reinforcing bar information used by the three-dimensional model creating unit 36 , bar arrangement drawing creating unit 37 , summary table creating unit 38 , and two-dimensional code creating unit 40 . The two-dimensional code creating unit 40 creates two-dimensional code information to be displayed on a management tag (picture tag) or the like.

These three-dimensional model creation unit 36, bar arrangement drawing creation unit 37, summary table creation unit 38, reinforcing bar information calculation unit 39, and two-dimensional code creation unit 40 are executed by the CPU of the control unit 31 according to the BIM program. It is a functional module that Among these functional modules, the summary table creation unit 38, the reinforcing bar information calculation unit 39, and the two-dimensional code creation unit 40 will be described later in detail.

The storage unit 32 is a nonvolatile storage unit including a semiconductor memory such as a ROM or a RAM that stores various information, a HDD (Hard Disk Drive), or an SSD (Solid State Drive). The storage unit 32 stores an operating system program, a driver program, an application program, data, and the like used for processing in the processor (here, the control unit 31).

The program stored in the storage unit 32 may be provided by a non-temporary recording medium (not shown) on which the program is readable. Examples of recording media include portable memories such as CD-ROMs, USB (Universal Serial Bus) memories, SD (Secure Digital) cards, micro SD cards, and compact flash (registered trademark). In this case, the control unit 31 reads the program from the recording medium using a reading device (not shown) and installs the read program in the storage unit 32 .

A program stored in the storage unit 32 may be provided by communication via the communication unit 33 . In this case, the control unit 31 acquires the program through the communication unit 33 and installs the acquired program in the storage unit 32 .

The communication unit 33 includes an interface circuit for communicating with a management computer (not shown) of the construction unit 14 (FIG. 1) through a communication network. The communication unit 33 performs wired or wireless data communication according to a predetermined communication protocol. For example, when information to be transmitted to the construction unit 14 is input from the control unit 31 , the communication unit 33 transmits the input information to the construction unit 14 . The communication unit 33 outputs information received from the construction unit 14 through the communication network to the control unit 31 .

An operation unit 34 and a display unit 35 are connected to the construction support device 30 . The operation unit 34 is, for example, operation input means such as a keyboard, mouse, and touch panel. Although only one operation unit 34 is shown in FIG. 4, the operation unit 34 comprehensively represents these operation input means. The display unit 35 is display means such as a general display device.

A general PC can also be used as a management computer (not shown) of the construction section 14 (FIG. 1). Also, in the processing section 16 (FIG. 1), a management computer (not shown) is used to communicate with the construction section 14 via a communication network. As a management computer for the construction section 14 and the processing section 16, a computer having the same hardware configuration as the construction support device 30 can be employed.

In the control unit 31 related to the construction support device 30 (FIG. 4) of the data supply unit 12, the reinforcing bar information calculation unit 39 has a function (to be described later) of performing various calculations related to reinforcing bars. In addition, the reinforcing bar information calculation unit 39 also has functions such as rounding up numerical values, rounding down numerical values, and numerical conversion between units of millimeters, centimeters, and meters, for example. Further, the reinforcing bar information calculation unit 39 also has a function of calculating the length of the reinforcing bar, and calculating the weight of the reinforcing bar and the estimated price based on the length of the reinforcing bar. The reinforcing bar information calculation unit 39 may perform numerical calculations using a spreadsheet software program (hereinafter referred to as “spreadsheet software”) installed in the construction support device 30 .

The two-dimensional code creation unit 40 creates a two-dimensional code based on the reinforcing bar information obtained by the reinforcing bar information calculation unit 39 . The two-dimensional code contains information on the dimensions of each part of the rebar to be manufactured. The two-dimensional code is transmitted to the processing section 16 via the construction section 14 and read by the reinforcing bar processing machine (reference numeral 17 in FIG. 1) in the processing section 16 . The reinforcing bar processing machine 17 bends a straight reinforcing bar before processing to produce a reinforcing bar having a desired shape and dimensions. Here, the reinforcing bar processing machine 17 in FIG. 1 is only shown as an icon, and does not specifically represent the configuration of the reinforcing bar processing machine 17 actually used in the processing section 16 .

Further, the control unit 31 has various functions other than the function of the reinforcing bar information calculation unit 39 and the function of the two-dimensional code generation unit 40, and the description thereof will be omitted here.

<Hierarchical structure of reinforcing bar objects>
FIG. 5 shows an example of reinforcing bar objects handled on the BIM program. In the BIM program, reinforcing bars are classified by shape, and each classification constitutes a "family". The reinforcing bar objects shown in the example of FIG. 5 fall into the "family" of reinforcing bars having a U-shaped shape in katakana.

The above-mentioned "family" means one hierarchy in various types of information having a hierarchical structure. In the BIM program of the present embodiment, a model of a target building is defined as a "project", and under this "project", layers such as "category", "family", and "type" are defined. ing.

Of these hierarchies, "category" is the relatively highest hierarchy, and "type" is the relatively lowest hierarchy. "Family" is a hierarchy positioned between "Category" and "Type".

For example, in the "category", categories such as "pillar", "wall", and "window" are defined. Further, in the "category" of "column", "families" such as "cylindrical column" and "rectangular column" are defined.

In the "family" of "cylindrical", "types" such as "cylindrical (diameter 450 mm)" and "cylindrical (diameter 600 mm)" are defined. In the "family" of the "rectangular column", "types" such as "rectangular column (450 mm x 600 mm)" and "rectangular column (600 mm x 750 mm)" are defined.

In this embodiment, a "category" of "rebar" is created. In the "category" of "reinforcing bar", a plurality of types of "families" related to rebars having a U-shape, a square shape, or other shapes are defined. For various "families", many types of "types" having different sizes of common portions are defined.

In addition to these, various "categories", "families" and "types" are defined in BIM programs. Object information related to various "categories", "family" and "types" is called from the storage unit 32 (FIG. 4) and used. In addition, the operator of the BIM program can add "category", "family", and "type" not previously registered in the library to the library as necessary.

For example, "family" includes types such as "system family", "in-place family", and "embeddable family". Among these, the "system family" is a basic family, and includes walls, floors, roofs, ceilings, stairs, and the like.

An "in-place family" is a family in which the operator can change the shape of the object. A "loadable family" is a family that is individually created and loaded from a library into a project file (project file) for use. This includes windows, doors, furniture, equipment, and the like manufactured by specific building material manufacturers. It is possible to use "in-place families" to create parts that make up a unique design in a building, and to create "loadable families" to create general parts that can be used in multiple buildings.

Such functions of multiple types of families may be provided even in conventional general-purpose BIM programs. However, the inventors have defined new parameters for reinforcing bar objects, which have not existed in the past, and have made the BIM program even more effective. This point will be described below.

<Reinforcement object parameters>
In the example of FIG. 5, reinforcing bar objects (hereinafter referred to as "reinforcing bar object ”), “number”, “diameter”, “shape”, “a dimension”, “b dimension”, “c dimension”, “d dimension”, “e dimension”, “reinforcing bar length”, Information of "unit weight", "single weight", "number", and "reinforcing bar weight" is shown.

Detailed length information ("a dimension", "b dimension", "c dimension", "d dimension", and "e dimension”, etc.) is given. In the example of FIG. 5, the a dimension is the length of the straight portion (hereinafter referred to as "central straight portion") forming the central portion in FIG.

The b dimension and the d dimension are the lengths of straight portions located on the left and right sides of the central straight portion in FIG. The c dimension and the e dimension are the lengths of arc-shaped portions connecting the central straight portion and the left and right straight portions in FIG. 5 (hereinafter referred to as "bent portions").

In the example of FIG. 5, three types of reinforcing bar objects (F1 to F3) are shown that differ from each other in a dimension or b dimension. Various information related to reinforcing bar objects (here, F1 to F3) function as parameters. When the operator changes various information related to the reinforcing bar objects (here, F1 to F3), the values of the corresponding parameters are rewritten and the type of the reinforcing bar object is changed.

<Parameter input example>
FIG. 6 shows an example of a screen display during input work related to the parameters of a reinforcing bar object. A U-shaped reinforcing bar object 42A is displayed on the left side of FIG. "Defined parameters" and arrows shown for the reinforcing bar object 42A are added for explanation of this embodiment.

For the reinforcing bar object 42A, when the operator inputs the dimensions of the straight line portions (a to c portions) as indicated by the characters and arrows of "defined parameters", the bending portion is displayed in the parameter table 42B shown on the right side of FIG. (hereinafter referred to as "bend information") are automatically calculated and displayed.

In the example of FIG. 6, for the straight portion of the reinforcing bar object 42A, a (dimension of portion a) = 1200 [mm], b (dimension of portion b) = 600 [mm], c (dimension of portion c) = 1200 [mm]. mm] is entered. Along with this, in the parameter table 42B, in addition to the input dimensions of a to c, bent portion information such as the bending diameter (the radius of the arc at the bent portion), straight portion information related to the straight portion, etc. are displayed. . Here, in the example of FIG. 6, unlike the example of FIG. 5, the portion c is the left straight portion.

The dimension value entered is the sum of the straight portion and the bent portion. In the example of FIG. 6, the reinforcing bar diameter is 10 [mm], and the bending diameter calculated based on this reinforcing bar diameter is 27.6 [mm]. When a dimension value of 1200 [mm] is entered for the a part, the breakdown of the dimension of the a part is the bending diameter + the straight part, strictly in millimeters (hereinafter referred to as "millimeters", one decimal place) Length + bending diameter. Specifically, the breakdown of the dimension of the a portion is 27.6 [mm] + 1144.8 [mm] + 27.6 [mm] = 1200 [mm].

In this way, by entering the dimension value including the bending diameter (here, 1200 [mm]) as the dimension value of the straight portion, the dimension of the straight portion in millimeters (straight portion information) and the bending diameter, etc. Various parameters are calculated separately from the bent portion information.

Here, the U-shaped reinforcing bar object 42A is taken as an example, but for reinforcing bar objects (not shown) of other families, linear part information can be obtained in units of millimeters by inputting the dimensions of the straight part. and bending information are calculated.

Parameter values can be freely changed in the BIM program. It is also possible to perform calculations between parameters (addition, subtraction, multiplication and division, calculations of functions including parameters, etc.). Also, the BIM program uses the new parameters to create various types of information about the reinforcing bar object. Furthermore, the BIM program aggregates various types of information based on the created information.

<New parameter>
The BIM program in this embodiment has a function of calculating the length and weight of the reinforcing bar using the central dimension (described later) of the reinforcing bar having a bent portion (also referred to as "bent reinforcing bar"). In the construction support method of the present embodiment, which is performed using a BIM program, as parameters related to the three-dimensional model of the bent reinforcing bar, information on the central dimension of the bent reinforcing bar in units of millimeters and a unit larger than the unit of millimeters (here, centimeter a three-dimensional model information creation process for creating three-dimensional model information related to the three-dimensional model using outer surface dimension information in meters), and a reinforcing bar production information creation process for creating reinforcing bar production information based on the three-dimensional model information. , and at least in the three-dimensional model information creation step, three-dimensional model information is created including center dimension information.

"Center dimension information" corresponds to information representing the dimension (length) of a portion along the center line of the reinforcing bar (such as the center line C in FIG. 7A), as will be described later. "External surface dimension information" corresponds to information representing the dimension (length) of a portion along the external surface of the reinforcing bar (such as the external surface 47 in FIG. 7(b)). "Three-dimensional model information" corresponds to the information of the three-dimensional model of the bent reinforcing bars (the information of the bent reinforcing bars represented in the summary table of FIG. 9B, etc.). The "three-dimensional model information creation process" is a process of creating "three-dimensional model information". "Reinforcing bar fabrication information" corresponds to information created based on "three-dimensional model information" (two-dimensional code, information used to create the two-dimensional code, etc.). The 'reinforcing bar manufacturing information creation process' is a process for creating 'reinforcing bar manufacturing information'. The figures after FIG. 7 will be described later.

Further, in the construction support method of the present embodiment, at least in the reinforcing bar manufacturing information creation step, the reinforcing bar manufacturing information including the outer surface dimension information is created, and the reinforcing bar manufacturing information is read by a reading device (such as an optical two-dimensional code reader). A rebar production information output process is provided for converting the code into a readable code (such as a two-dimensional code) and outputting the code.

Furthermore, the construction support method of the present embodiment includes a length calculation step of calculating length information of the bent reinforcing bar using center dimension information, and a weight calculation step of calculating weight information of the bent reinforcing bar based on the length information. , provided. The “bent reinforcing bar length information” is information representing the length (total length) of the reinforcing bar. “Bent reinforcing bar weight information” is information representing the weight of the reinforcing bar.

A new parameter defined in this embodiment is information about the central dimension of the bends (parts c and e in the example of FIG. 5) in the rebar object. Specifically, the new parameters are various information such as the center dimension in millimeters of the bent portion and the length and weight of the reinforcing bar calculated using this center dimension.

The bending diameter, which is one of the bending portion information, is calculated as a value using the center dimension of the reinforcing bar. FIG. 7(a) schematically shows the central dimension of a U-shaped reinforcing bar object. In the example of FIG. 7(a), the center dimension is represented by the length of the center line C, which is a one-dot chain line, rather than by specific numerical values or symbols.

In the example of FIG. 7A, the reinforcing bar object 46 is composed of a central straight portion (a portion), left and right straight portions (b portion, d portion), and bending portions (c portion, e portion). . The center dimension can be said to be the length of a virtual line (center line C) passing through the center of the reinforcing bar object when the diameter of the reinforcing bar object 46 is assumed.

The dimension (outer surface dimension) of the surface (outer surface) 47 outside the center line C of the reinforcing bar object 46 is outside the center dimension and has a larger value than the center dimension. FIG. 7B schematically shows the outer surface 47 with a thick line 47a. The outer surface dimensions are represented by the length of the thick line 47a that indicates the outer surface 47. As shown in FIG. The reinforcing bar object 46 illustrated here has a substantially circular cross section. Therefore, the outer surface 47 in FIG. 7B corresponds to the ridgeline outside the centerline C.

In FIG. 7B, a surface (inner surface) 48 inside the center line C of the reinforcing bar object 46 is schematically indicated by a thick line 48a. The dimension of the inner surface 48 (inner surface dimension) is represented by the length of the thick line 48a indicating the inner surface 48. As shown in FIG. The inner surface 48 corresponds to a ridgeline inside the centerline C. As shown in FIG.

The outer surface 47 is positioned outside the centerline C. As shown in FIG. Therefore, the outer dimension is larger (longer) than the central dimension. In addition, the inner surface 48 is located outside the center line C. As shown in FIG. Therefore, the inner dimension is smaller (shorter) than the central dimension.

FIG. 8(a) shows an enlarged view of one bent portion (c portion) of the reinforcing bar object 46. FIG. The length of the bend is defined as the length of the centerline Cc in the bend. The length (total length) of the reinforcing bar object 46 is defined as the length of the centerline C. As shown in FIG. As shown in FIG. 8B, the length (total length) of the reinforcing bar object 46 is the length of the center line Ca at the center straight portion, the length of the center lines Cb and Cd at the left and right sides, and the length of the center lines Cb and Cd at two locations. It is represented by the sum of the lengths of the center lines Cc and Ce at the bent portion of .

The length of the bent portion (the length of the center line Cc, which is the center dimension, and/or the length of the center line Ce) is one piece of bent portion information. In this embodiment, the function of the summary table creation unit 38 enables the creation of a summary table that does not include bend information (FIG. 9A) and a summary table that includes bend information (FIG. 9B). is.

FIG. 9(a) shows an example of the summary table when the bend information is not included. In the example of FIG. 9A, the "number" representing the reinforcing bar object having the same shape as the reinforcing bar object 42A in FIG. 6 is "F2", and the "shape" of this reinforcing bar object of F2 is "C-1". is represented.

Also in FIG. 5, the symbol F2 is used. FIG. 5 shows information on a reinforcing-bar object different from the reinforcing-bar object shown in FIG. 9(a). Therefore, even if the symbols used are common, the dimensions of each part are different between the reinforcement object F2 in FIG. 9A and the reinforcement object F2 in FIG.

Regarding the reinforcing bar object (hereinafter referred to as "reinforcing bar object F2") in FIG. 9A, the dimension of the a portion is a=500 [mm]. Furthermore, the dimensions of the b portion and the c portion, which are the left and right straight portions, are b=150 [mm] and c=150 [mm]. On the other hand, in the reinforcement object F2 in FIG. 5, the dimensions of the corresponding parts a, b, and d are 8,036 [mm], 673 [mm], and 1,740 [mm]. In addition, in FIG. 5, portions c and e, which are bent portions, are defined, but bent portions are not defined in FIG. 9(a).

In the reinforcing bar object F2 in the summary table of FIG. 9A, the "reinforcing bar length" is 750 [mm]. The value of a+b+c for the reinforcing bar object F2 is 800 (=500+150+150) [mm]. However, in the summary table of FIG. 9(a), the reason why the "reinforcing bar length" is 750 [mm] is that it is easy to work when using the summary table of FIG. 9(a) at the construction site. This is because it takes into account the

That is, at construction sites, centimeters (cm) are usually used as the unit of length. In other words, at construction sites, centimeters are the unit used for information sharing and communication among concerned parties.

For this reason, even if the exact length of the necessary rebar in millimeters (millimeters) is, for example, 741 [mm], the numerical value handled at the construction site is 750 [, which is the numerical value rounded up in units of mm]. mm] (=75 [cm]). In addition, if the numerical value handled at the construction site is rounded down to, for example, 740 [mm] (= 74 [cm]), it is possible that the length of the rebar will be insufficient or the strength will be insufficient. is usually adopted.

For these reasons, in the summary table in the example of FIG. 9A, a value of 750 [mm] is displayed as the "reinforcing bar length" related to the reinforcing bar object F2.

The value of 750 [mm] related to the "length of reinforcing bar" is rounded up so that the end of the numerical value in millimeters is 0 (zero). For this reason, by mentally calculating 1/10 for the value of 750 [mm], the person concerned at the construction site can convert from the millimeter unit to the centimeter unit (centimeter unit). Therefore, it is easy to convert from millimeter units to centimeter units at the construction site.

Also, the numerical values of a=500 [mm], b=150 [mm], and d=150 [mm] related to the reinforcing bar object F2 in FIG. is also determined in consideration of the ease of work at the construction site.

Specifically, at a construction site, one straight reinforcing bar is processed by being hooked to a reinforcing bar processing machine (hereinafter referred to as a "bending machine"). As a bending machine, various general machines can be used. When fabricating a U-shaped reinforcing bar based on the numerical values related to the reinforcing bar object F2 in FIG. =50 [cm]), 150 [mm] (=15 [cm]), and 150 [mm] (=15 [cm]).

FIG. 10 schematically shows information necessary for an operator who performs processing work. Comparing FIG. 10 with FIG. 7( a ), in FIG. 10 , the arc-shaped bent portions (parts c and e) in FIG. 7( a ) are changed to right angles. As shown in FIG. 10, if the worker recognizes the dimension including the bent portion (c part, e part) in FIG. You can create the desired type of rebar. The numerical values used by the workers at the construction site are the numerical values of the outer surface dimensions.

As previously mentioned, the value of the outer dimension is greater than the central dimension. Consider a reinforcing bar object 46A in which the bent portions (c portion and e portion) of the reinforcing bar object 46 shown in FIG. The reinforcing bar object 46A has a longer reinforcing bar length (outer dimension, center dimension, and inner dimension) than the reinforcing bar object 46 in FIG. 7A having an arc-shaped bend.

In the summary table of FIG. 9A, the a portion, the b portion, and the d portion are 500 [mm], 150 [mm], and 150 [mm], respectively. Summing up these numerical values gives 800 (=500+150+150) [mm].

However, according to the numerical value of "rebar length" in the summary table of FIG. prepare. Furthermore, the worker at the construction site performs processing work so that the external dimensions of the a portion, the b portion, and the d portion are 50 [cm], 15 [cm], and 15 [cm], respectively. As a result, the actual length of the reinforcing bar (total length by the center dimension) is shorter than 800 [mm], which is the total value of the a part, the b part, and the d part on the summary table. A U-shaped reinforcing bar shorter than the numerical value of "L" is produced.

In this way, the numerical information of 750 [mm] in the "rebar length" in the summary table of FIG. 9A was created in consideration of the ease of work at the construction site. In addition, in the summary table of FIG. 9A, considering the length of the bent portion (the length of the bent portion by the center dimension) calculated based on a predetermined formula, parts a, b, and d is calculated to be larger than the actual length of each part in the rebar to be fabricated.

The summary table of FIG. 9(b) shows more accurate dimensional information than the summary table of FIG. 9(a) in which convenience at the construction site is prioritized. In the example of FIG. 9(b), the "shape" of the reinforcing bar object F2 of FIG. 9(a) is "C-1" as in FIG. 9(a). Hereinafter, the reinforcing bar object whose "shape" symbol is displayed as "C-1" in FIG. 9B will be referred to as "reinforcing bar object C-1", and Distinguish from F2.

In the summary table of FIG. 9(b), the symbols a to e assigned to each part of the reinforcing bar object C-1 are the same as the symbol assignments shown in FIG. Specifically, the central linear portion is defined as a portion, and the left and right linear portions are defined as portions b and d. Also, the bent portions are the c portion and the e portion.

In the summary table of the example of FIG. 9B, the dimension of the portion a of the reinforcing bar object C-1 is a=409 [mm]. Furthermore, the dimensions of the b portion and the d portion of the reinforcing bar object C-1 are b=105 [mm] and d=105 [mm]. The dimensions of c portion and e portion which are bent portions are c=61 [mm] and e=61 [mm].

Equation (1) below is used to calculate the lengths of the bends (parts b and d) in the family of the reinforcing bar object C-1. In the example of FIG. 9B, the reinforcing bar diameter (diameter), which is the "diameter" of the reinforcing bar object C-1, is 13 [mm].
(Length of bent portion) = 1.5 x π (perimeter) x (reinforcing bar diameter) Equation (1)

Substituting 13 mm, which is the value of the "diameter", into the formula (1), the length of the bent portion (the length of the b portion = the length of the d portion) is 1.5 x π (= 3.14 )×13=approximately 61.23. When the obtained value is rounded off to the nearest whole number, the value becomes 61 [mm], and this value is displayed in the "c" and "e" columns in the summary table of FIG. 9(b). .

It should be noted that the formula for calculating the length of the bend (the length of the c and d portions) may vary depending on the rebar family.

In the example of FIG. 9B, the value of a+b+c+d+e in the reinforcing bar object C-1 is 741 (=409+105+61+105+61) [mm]. The display of the "reinforcing bar length" is 750 [mm], while the calculated value is 741 [mm]. This is a numerical value obtained by rounding up the numerical value of the "length of reinforcing bar" in calculation so that the end of the numerical value in millimeters is 0 (zero).

In this way, by using the numerical values of the bent portion displayed in the summary table of FIG. 9B, the "length of the reinforcing bar" can be calculated more accurately. Information (bending portion information) of the bending portion (c portion, e portion) is incorporated into the BIM program, for example, by incorporating a routine for performing calculation by a mathematical formula such as Equation 1, and the reinforcing bar information calculation unit 39 (FIG. 4) calculates is obtained by performing

Programs for BIM describe the bending equations for different families of reinforcing bars. For example, the designer selects a family and inputs the value of "diameter" to calculate the bend information. Then, by inputting values of other parameters (lengths of parts a, b, and d) related to the reinforcing bar object (here, reinforcing bar object C-1), a more accurate "length of the reinforcing bar" can be obtained. is calculated.

The BIM program calculates information of various reinforcing bar objects (three-dimensional model information, reinforcing bar manufacturing information, central dimension information, external dimension information, etc.) by the method described above. In addition, the BIM program combines information on various reinforcing bar objects and information on other "categories" to create a three-dimensional model of the project (Fig. 2).

In order to accurately calculate and display the length of the reinforcing bar, it is effective to perform the calculation using the central dimension as in this embodiment. However, at the construction site related to the construction section 14 (Fig. 1), the diameter of the reinforcing bar is halved to calculate the distance from the center line, and the calculated value is subtracted from the dimensions given in a summary table or the like. The work of accurately determining the required length of reinforcing bars by adding them is troublesome for workers and causes a decrease in work efficiency. Therefore, it is difficult to perform work based on the center dimension of the reinforcing bar at the construction site, and work is performed based on the outer surface dimension, which can be relatively easily performed.

In addition, if the summary table (Fig. 9(a)) provided to the construction site indicates that construction must be performed in consideration of the length of the bent part, the diameter and circumference of the reinforcing bar at the construction site A complicated confirmation work using the rate is required, and the possibility of human error increases.

Furthermore, in the bar arrangement diagram (FIG. 2), which is the basis for creating the summary table, the bent portion is often not shown in the diagram. Further, in the case of a three-dimensional model, unless the viewpoint of the three-dimensional model is changed, it may be hidden in the projection direction and cannot be visually recognized. Therefore, it is difficult to calculate the center dimension of the bent portion after the fact.

However, as in the construction support system 10 of the present embodiment, the data supply unit 12, which is the most upstream of the information, generates information on the reinforcing bar object using the center dimension of the bent portion as a parameter. It is possible to centrally create accurate reinforcing bar object information without calculating the dimensions of the reinforcing bar or calculating the dimensions of the bent portion at the reinforcing bar processor.

<Use of 2D code>
The BIM program converts the information of the rebar object into a two-dimensional code for operating the bending machine. A two-dimensional code created by a BIM program is printed on a management tag (picture tag) and attached (or may be pasted) to a straight rod-shaped reinforcing-bar product before bending. A two-dimensional code printed on the management tag is read by, for example, an optical two-dimensional code reader, and input to the bending machine as processing information. The bending machine operates based on the input processing information, bends the straight bar-shaped reinforcing bar, and manufactures the reinforcing bar in the desired shape.

<Estimated weight and price>
Furthermore, the BIM program, as shown in the summary table of the example in FIG. , to compute the weight of the rebar. The weight of the reinforcing bar can be obtained by the following formula (2). The specific gravity of steel, which is the material for reinforcing bars, is about 7.85.
π/4 × (diameter [mm]) ² × (length of reinforcing bar [mm]) × (specific gravity of material of reinforcing bar) × 10 ⁶ Equation (2)

Such calculation of the weight of reinforcing bars can be performed for all reinforcing bars used in the three-dimensional model. Therefore, the total weight of a plurality of reinforcing bars can be calculated by calculating and totaling the weights of all the reinforcing bars to be weight-calculated. Further, by calculating the product of the calculated weight and the unit price of the material (price per unit weight), it is possible to calculate the price of the target reinforcing bar. Since these calculations are performed using accurate bending portion information, more accurate estimated weight and estimated price can be calculated.

<Reinforcement Object Classification Based on Change Tolerance>
The BIM program in this embodiment has a function of calculating the length and weight of the reinforcing bar using the center dimension of the bent reinforcing bar (FIG. 7(a)). It is now possible to handle multiple types of rebar objects with different dimensional change tolerances.

FIGS. 11(a)-(c) schematically illustrate the classification of reinforcing bar objects based on change tolerance. As shown in FIG. 11( a ), the construction support method performed using the BIM program in this embodiment includes a first bending reinforcing bar family and a second bending reinforcing bar family that can configure a project in a three-dimensional model of bending reinforcing bars. Contains rebar families.

A "project" is a model of a target building. “First bending reinforcing bar family” and “second bending reinforcing bar family” are families classified into different families among families related to bending reinforcing bars.

The first bending bar family is shared by multiple projects as shown in Figure 11(b). In FIG. 11(b), the first bending reinforcing bar information 1 is commonly used in project 1 and project 2, which are different projects. For example, in the project of the beam-column joint shown in FIG. 3(a) (or the beam-column joint shown in FIG. ) is used, the first bending bar family is shared by multiple projects. The 'second bending bar family' may also include those that are not sharable across multiple projects.

"First bending bar information 1" means one of the first bending bar information contained in the first bending bar family. That is, as shown in FIG. 11(a), the first bending reinforcing bar family includes first bending reinforcing bar information for at least one bending reinforcing bar. In the example of FIG. 11( a ), the first bending reinforcing bar family includes first bending reinforcing bar information 1 to first bending reinforcing bar information 3 . The number of types of the first bending reinforcing bar information may be two or less, or may be four or more.

The secondary bending bar family also includes secondary bending bar information for at least one bending bar. In the example of FIG. 11( a ), the second bending reinforcing bar family includes second bending reinforcing bar information 1 to second bending reinforcing bar information 3 . The number of types of second bending reinforcing bar information may be two or less, or may be four or more.

For the first bending reinforcing bar information (first bending reinforcing bar information 1 to first bending reinforcing bar information 3 in the example of FIG. 11A), the center dimension of the bent portion of the bending reinforcing bar is constrained by a mathematical formula based on the reinforcing bar diameter. It can be set in the range.

The "central dimension of the bent portion" is the central dimension (the length of the center line Cc in FIG. 8 (b), the length of the center line Ce etc.). "Formula based on rebar diameter" is a formula with rebar diameter as a parameter (e.g., "(Length of bent portion) = 1.5 x π (Circumference) x (Rebar diameter)" in Equation (1)). be. "Can be set within a range restricted by a formula" means that the range is restricted by substituting arbitrary values for parameters (reinforcing bar diameter, etc.) of various formulas.

As for the second bending reinforcing bar information, the center dimension of the bent portion of the bending reinforcing bar can be arbitrarily set. “The center dimension of the bent portion can be set arbitrarily” means that the center dimension of the bent portion can be defined by arbitrarily entering a numerical value without being limited to a predetermined formula (Formula (1), etc.). is. It is possible to arbitrarily and directly input the value of the "central dimension of the bent portion".

Numerical formulas (such as Equation (1)) include at least the pi (π) as a constant, and the pi is used to at least two decimal places (up to 3.14).

For the project related to the first bending reinforcing bar family, for example, while displaying the screen, the straight part (straight line portion) can be arbitrarily changed by dragging via a mouse operation. Also, for example, the dimension of the straight portion (straight line portion) of the reinforcing bar object 42A shown in FIG. It is possible to do However, the length dimension of the bend cannot be changed from the range constrained by the formula. The formula differs depending on the diameter of the reinforcing bar.

The “project related to the first bending reinforcing bar family” is a plurality of projects that can share the first bending reinforcing bar family (the first bending reinforcing bar information 1 to the first bending reinforcing bar information 3 in the example of FIG. 11(a)). "While displaying on the screen" means displaying on the display unit 35 (FIG. 4) or the like so that the contents of modeling can be visually recognized. A “straight portion” is a straight portion of a reinforcing bar (a portion, b portion, d portion, etc. in FIG. 7(a)).

"Can be changed arbitrarily" for the dimension of the straight part (straight part) means that the dimension (length) of the "straight part" can be extended to any value without being restricted by formulas (formula (1), etc.) It means to expand and contract. "Length dimension of bend" means the length dimension expressed by the center dimension of the bend. 'The length dimension of the bending section cannot be changed from the range constrained by the above formula' means that the length of the straight section can be arbitrarily changed for the project section of the 1st bending rebar family, but the bending The length dimension of the portion is meant to be constrained by the formula.

<Advantages of the invention according to the present embodiment>
According to the construction support system 10 of the present embodiment as described above, the information of the reinforcing bar object created by the BIM program in the data supply unit 12 (here, reinforcing bar production information, outer surface dimension information, etc.) is transferred to the construction unit 14 and the processing unit 16. Further, the information of the reinforcing bar object is adjusted to the required values and units by the data supply unit 12, the construction unit 14, and the processing unit 16, and supplied.

The dimensions of the bend can be represented by the center dimension in the data provider 12 (FIG. 1). The length of the reinforcing bar is represented by a numerical value including the center dimension of the bent portion. Therefore, information on the length of the reinforcing bar is accurately represented, and accurate information on the length of the reinforcing bar can be provided to the construction section 14 . Therefore, it is possible to provide accurate information based on the center dimension.

In addition, the data supply unit 12 can provide the construction unit 14 with information regarding the length of the reinforcing bar, which is represented by the center dimension and the information represented by the outer surface dimension. Therefore, in the construction section 14 and the processing section 16, there is no need to manually convert the information acquired from upstream into necessary information. From the design to the manufacturing of reinforcing bars, consistent data exchange without human error becomes possible.

Further, the information of the reinforcing bar object created by the data supply unit 12 includes information of the length of the bent portion calculated in units of millimeters. Therefore, various simulations can be accurately performed based on accurate information regarding the length of the reinforcing bar. For example, it is possible to check for interference between reinforcing bars in a reinforcing bar arrangement diagram (for example, FIGS. 3(a) and 3(b)) and to accurately perform various estimates related to reinforcing bars. An accurate estimate can be made at the data supplier 12 . In addition, by providing accurate information on the length of reinforcing bars from the data supply unit 12 to the construction unit 14, the construction unit 14 can also perform an accurate estimate. Therefore, there is no need to place an order that may include an excessive surplus from the construction section 14 to the processing section 16, and the cost can be reduced.

In addition, as shown in FIGS. 11A to 11C, different types of reinforcing bar objects can be created depending on the degree of change tolerance, so that a 3D model can be created by various methods.

From these, according to the construction support method, the construction support program, and the construction support device 30 of the present embodiment, the digital twin concept that reproduces the real space in the virtual space (digital space) is more useful. It is possible to develop it into something with high quality and practicality.

It should be noted that the above-described embodiment merely shows an example of specific implementation of the present invention, and the technical scope of the present invention should not be construed as being limited by this. Thus, the invention may be embodied in various forms without departing from its spirit or essential characteristics.

For example, in the example of FIG. 1, various types of information (information such as processing notes and two-dimensional codes) are provided from the data supply unit 12 to the processing unit 16 via the processing unit 14. Various types of information may be provided to the processing section 16 without going through the construction section 14 .

10: construction support system 12: data supply unit 14: construction unit 16: processing unit 17: reinforcing bar processing machine 22: three-dimensional model 24: bar arrangement diagram 26: summary table 30: construction support device 31: control unit 32: storage unit 33: communication unit 34: operation unit 35: display unit 36: three-dimensional model creation unit 37: bar arrangement drawing creation unit 38: summary table creation unit 39: reinforcing bar information calculation unit 40: two-dimensional code creation unit 42A, 46, F2 , C-1, 46A: reinforcing bar object 47: outer surface 48: inner surface C, Ca to Ce: center line

Claims (7)

A building construction support method using building information modeling, comprising:
As parameters related to the three-dimensional model of the bending reinforcing bar, using center dimension information in units of millimeters of the bending reinforcing bar and outer surface dimension information in units larger than the unit of millimeters,
a three-dimensional model information creating step of creating three-dimensional model information relating to the three-dimensional model;
a reinforcing bar manufacturing information creating step of creating reinforcing bar manufacturing information based on the three-dimensional model information;
At least in the three-dimensional model information creating step, the construction support method includes creating the three-dimensional model information including the center dimension information. at least in the step of creating reinforcing bar fabrication information, creating the reinforcing bar fabrication information including the outer dimension information;
2. The construction support method according to claim 1, further comprising a reinforcing bar manufacturing information output step of converting the reinforcing bar manufacturing information into a read code readable by a reading device and outputting the read code. a length calculation step of calculating length information of the bending reinforcing bar using the center dimension information;
3. The construction support method according to claim 1, further comprising a weight calculation step of calculating weight information of said bent reinforcing bars based on said length information. A construction support program for causing a computer to execute a building construction support method using building information modeling,
As parameters related to the three-dimensional model of the bending reinforcing bar, using center dimension information in units of millimeters of the bending reinforcing bar and outer surface dimension information in units larger than the unit of millimeters,
3D model information creation processing for creating 3D model information related to the 3D model;
a reinforcing bar production information creation process for creating reinforcing bar production information based on the three-dimensional model information;
A construction support program for creating the three-dimensional model information including the center dimension information in at least the three-dimensional model information creating process. at least in the reinforcing bar fabrication information creating process, creating the reinforcing bar fabrication information including the outer dimension information;
5. The construction support program according to claim 4, comprising a reinforcing bar manufacturing information output process for converting the reinforcing bar manufacturing information into a read code that can be read by a reading device and outputting the read code. A length calculation process for calculating length information of the bent reinforcing bar using the center dimension information;
6. The construction support program according to claim 4, further comprising weight calculation processing for calculating weight information of said bent reinforcing bar based on said length information. The construction support method according to claim 1 or the construction support device for executing the construction support program according to claim 4.

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