Method and system for constructing wall balustrade of precast floor slab

Abstract

To provide a method for constructing a wall balustrade of a precast floor slab, which is low in a manufacturing cost, capable of reducing steps, and low in pre-reviewing.SOLUTION: This method for constructing a wall balustrade in a precast floor slab comprises steps of: acquiring, regarding a previously manufactured precast floor slab before installation on site, actual measurement data by measuring the position and the outer size of a wall balustrade constructed in the previously manufactured precast floor slab (S26 and S27); comparing the actual measurement data with target design data of a precast floor slab to be manufactured for constructing the wall from the data and acquiring corrected design data having the target design data corrected on the basis of the comparison result (S22); and striking concrete on the precast floor slab to be manufactured to construct a wall balustrade using the corrected design data (S23-S25).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method for constructing a high wall of a precast floor slab used in bridges and the like.

Background Art

[0002] Conventionally, in bridges such as general roads and highways, when an existing floor slab has deteriorated, a floor slab replacement construction is carried out in which the floor slab is removed from the main girder and a new floor slab is reconstructed. When the existing floor slab is a concrete floor slab, the new floor slab is constructed by arranging a plurality of concrete precast floor slabs manufactured in a factory in the bridge axis direction (see, for example, Patent Document 1).

[0003] The precast floor slab includes a floor slab body and a high wall constructed at an end of the floor slab body in a direction perpendicular to the bridge axis. And since the precast floor slabs are arranged and installed in a plurality in the bridge axis direction, when manufacturing each precast floor slab, it is necessary to manufacture the outer shape of the high wall so as to smoothly connect to other adjacent precast floor slabs when installed on site, that is, in a shape along the road alignment. In this specification, the "high wall" includes a ground covering portion.

[0004] Due to such requirements, conventionally, the following construction method has been adopted when manufacturing precast floor slabs. First, the floor slab bodies of a plurality (for example, 10 pieces) of precast floor slabs that will be adjacent to each other when installed on-site are manufactured. Next, these plurality of floor slab bodies are arranged on a temporary assembly scaffold. This scaffold reproduces the main girder arrangement of the target bridge. More specifically, it reproduces the gradient in the bridge axis direction, the interval in the width direction, and the height difference of the main girders of the target bridge. In addition, this scaffold is equipped with an adjustment mechanism for tilting its upper surface in the bridge axis direction. When arranging the floor slab body on the scaffold, the tilt angle is adjusted by the adjustment mechanism so that the upper surface of the scaffold matches the installation site. After arranging the floor slab body on the scaffold, next, a parapet wall is constructed on each floor slab body. At this time, the outer shapes of the parapet walls of the plurality of precast floor slabs are formed so that they are smoothly connected, that is, in a continuous shape along the road alignment. After constructing the parapet wall, each precast floor slab is removed from the scaffold and stored in a predetermined storage.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the above-mentioned conventional construction method, since the floor slab bodies of a plurality of precast floor slabs are arranged on a scaffold adjusted to match the installation site, it is easy to visually confirm whether the parapet wall has a shape along the road alignment. From this perspective, the construction work of the parapet wall is easy.

[0007] However, in the above-described conventional construction method, a huge gantry capable of placing a plurality of precast floor slabs is required, so there is a problem that the manufacturing and maintenance of the gantry, particularly the steel members for reproducing the on-site steel girders used as the gantry, require a great deal of cost. In addition, there is a problem that a vast site for installing the gantry is required. Furthermore, there is a problem that a great deal of work cost is required for the installation work and removal work of the precast floor slabs onto the gantry.

[0008] Also, generally speaking, when manufacturing precast floor slabs, it is more efficient to group the floor slabs using the same-shaped formwork. In contrast, in the conventional construction method, the floor slab bodies of a plurality of precast floor slabs are arranged on a gantry adjusted to match the installation site, and the wall height fences are constructed in the shape of each formwork. For this reason, there is a problem that the degree of freedom regarding the manufacturing order of the precast floor slabs is restricted.

[0009] [[ID=?]] Furthermore, in the conventional construction method, although it is possible to easily confirm visually whether the shape of the wall height fence follows the road alignment, in order to construct a wall height fence with a shape following the road alignment, dimensional adjustment is required during the formwork assembly of the wall height fence. Since the suitability of this adjustment work greatly depends on the experience of the supervisors and workers, there is a problem that highly personalized work is required.

[0010] The present invention has been made in view of the above circumstances, and an object thereof is to provide a method and a system for constructing a wall height fence for a precast floor slab with low manufacturing cost, capable of shortening the process, and having low personalization.

Means for Solving the Problems

[0011] It should be noted that there seems to be a typo in the original text where an unnumbered ID=? is present. It is likely a formatting or numbering error in the original.In order to achieve the above object, the invention of the present application is a method for constructing a wall railing on a precast floor slab, including: a wall railing measurement step of measuring the position and outer dimensions of the wall railing constructed on a first precast floor slab before being installed on site to obtain measured data; a correction step of comparing the measured data with the target design data of a second precast floor slab on which the wall railing is to be constructed therefrom, and obtaining corrected design data obtained by correcting the target design data based on the comparison result; and a placing step of placing concrete on the second precast floor slab using the corrected design data to construct the wall railing.

[0012] Further, the invention of the present application is a support system for supporting the construction of a wall railing on a precast floor slab, including: a wall railing measured data acquisition unit that acquires measured data of the position and outer dimensions of the wall railing constructed on a first precast floor slab before being installed on site; and a corrected design data creation unit that compares the measured data with the target design data of a second precast floor slab on which the wall railing is to be constructed therefrom, and creates corrected design data obtained by correcting the target design data based on the comparison result, and is characterized by including a design support device having the same.

Advantages of the Invention

[0013] According to the present invention, a wall height railing of a second precast floor slab is constructed using corrected design data obtained by correcting target design data. Here, the correction process is calculated based on the measured data of the position and outer dimensions of the wall height railing constructed on the first precast floor slab already manufactured and the target design data of the second precast floor slab on which the wall height railing is to be constructed. As a result, the formed product quality of the precast floor slabs to be sequentially manufactured is extremely high, and even when installed on site, it can have a high formed product quality and a continuous shape along the road alignment. Therefore, the process of temporarily assembling the floor slab bodies of a plurality of precast floor slabs on a gantry, as in the conventional construction method, becomes unnecessary. Accordingly, a large site for temporary assembly is also unnecessary, and manufacturing can be carried out in a factory with limited space. Also, the manufacturing order of the precast floor slabs can be arbitrary. From the above, the manufacturing cost is low, and the process can be shortened. Furthermore, since the correction process is based on objective information such as measured data and target design data, even a person with little experience can easily perform the work, and thus it becomes less dependent on human characteristics.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0015] An embodiment of the present invention will be described with reference to the drawings. In this embodiment, a case will be described in which the floor slab of the entire cross-section of a predetermined section of a bridge is removed, and a plurality of new precast floor slabs over the entire cross-section are arranged in the bridge axis direction in the removed section to replace the floor slab of the bridge.

[0016] The overall flow including the floor slab replacement will be described with reference to FIG. 1. First, the existing floor slab of the bridge is surveyed (step S11). This survey targets at least the area including the floor slab replacement section. The instrument used for the survey is not limited. In this embodiment, a total station called a surveying instrument having the functions of a theodolite for measuring angles and a laser distance meter for measuring distances is used. This total station is configured to be able to transfer survey data to other devices via a predetermined storage medium or by data communication.

[0017] Next, the process of manufacturing a new precast floor slab for replacement (hereinafter referred to as "precast floor slab to be manufactured") in a factory will be described. As shown in FIG. 2, a design support device 100, a measuring device 200, and a placing support device 300 are arranged in the factory as a wall height fence construction support system for the precast floor slab. In this specification, the "precast floor slab to be manufactured" means a precast floor slab to be manufactured and until the manufacturing is completed. The "precast floor slab to be manufactured" corresponds to the second precast floor slab described in the claims.

[0018] The design support device 100 is composed of a conventionally well-known information processing device. The design support device 100 may be implemented by installing a program in a computer, or may be implemented as dedicated hardware. The design support device 100 may be implemented in one device, or may be distributed and implemented in a plurality of devices. An example of the latter is a client-server type implementation form.

[0019] The design support device 100 includes a survey data acquisition unit 110, an actual measurement data acquisition unit 120 that acquires actual measurement data of a precast floor slab (hereinafter referred to as "precast precast floor slab") before the construction of the wall railing is completed and before it is installed on site, a 3D CAD function unit 130, a storage unit 140, and a corrected design data output unit 150. In this specification, for a certain precast floor slab, until the production is completed, it is called "precast floor slab to be produced", and after the production is completed, the precast floor slab is called "precast precast floor slab". The "precast precast floor slab" corresponds to the first precast floor slab described in the claims.

[0020] The survey data acquisition unit 110 acquires survey data from a total station and stores it in the storage unit 140. The survey data may be acquired via a predetermined storage medium, may be acquired from the total station by data communication, or may be acquired by input from an operator.

[0021] The actual measurement data acquisition unit 120 acquires actual measurement data of the precast precast floor slab from the measuring instrument 200 and stores it in the storage unit 140. The actual measurement data may be acquired via a predetermined storage medium, may be acquired directly from the measuring instrument 200 by data communication or via the casting support device 300, or may be acquired by input from an operator.

[0022] The 3D CAD function unit 130 has a design support function for a plurality of precast floor slabs to be produced. Specifically, the 3D CAD function unit 130 has a function of creating target design data for a plurality of precast floor slabs to be produced from the acquired survey data. The target design data includes the outer dimensions and girder slope of the floor slab body, the position and outer dimensions of the wall railing. Further, the target design data can include an allowable range for the target value together with the target value. Further, the target design data can include design data of the formwork to be produced during concrete casting. Also, the girder slope may calculate the slope value itself, or may calculate the height difference of the jack for adjusting the girder slope of the gantry used when producing the floor slab body. In this embodiment, as the girder slope, the height difference of the jack for slope adjustment is calculated.

[0023] Further, the 3D CAD function unit 130 has a function of three-dimensionally superimposing and displaying any data among the survey data, the target design data of the precast floor slab to be manufactured, the actual measurement data of the already manufactured precast floor slab, and the corrected design data described later. Here, the 3D CAD function unit 130 is configured to be able to display a plurality of precast floor slabs arranged in an arbitrary area of the floor slab replacement section. That is, in an arbitrary area of the floor slab replacement section, the 3D CAD function unit 130 simulates the formed shape of the wall height bar of the precast floor slab, and can check the continuity of the shape of the wall height bar while comparing the existing state before replacement, the state at the design stage, and the state after manufacturing with each other at any time.

[0024] An example of the display screen by the 3D CAD function unit 130 of the design support device 100 is shown in FIG. 3. The example in FIG. 3 is a three-dimensionally superimposed display of the survey data, the corrected design data, and the actual measurement data. Regarding the survey data, the ridge lines and the boundary lines are displayed as dotted lines, and the surfaces defined by the ridge lines and the like are displayed. Also, the corrected design data is displayed as a solid wireframe. Also, the actual measurement data is displayed as a dashed-dotted wireframe. In the example of FIG. 3, only two adjacent precast floor slabs among the plurality of precast floor slabs constituting the floor slab of the bridge are displayed. It should be noted that there is a gap called a filling portion between two adjacent precast floor slabs, and between the precast floor slab arranged at the outermost end of the arrangement among the new precast floor slabs and the existing part left at the site.

[0025] Furthermore, the 3D CAD function unit 130 has a function of comparing the measured data of the precast floor slab already manufactured with the target design data of the precast floor slab to be manufactured, and setting corrected design data obtained by correcting the target design data. This correction process may be such that the supervisor and the worker set the corrected setting data while checking the continuity of the shape of the wall height bar on the screen using the above-described superimposed display function of the 3D CAD function unit 130, or may be automatically calculated by a predetermined algorithm. Also, in the correction process, when the precast floor slab to be manufactured is arranged between two precast floor slabs already manufactured (regardless of whether they are adjacent), it is preferable to compare the measured data of the two precast floor slabs already manufactured with the target design data of the precast floor slab to be manufactured, and set corrected design data obtained by correcting the target design data. Incidentally, when there is not even one precast floor slab already manufactured, there is no measured data thereof, so no correction is made, that is, the target design data directly becomes the corrected design data. Also, in the present embodiment, corrected design data is set separately from the target design data, but the target design data itself may be directly corrected.

[0026] The corrected design data output unit 150 outputs the corrected design data of the precast floor slab to be manufactured to the placing support device 300. The corrected design data may be output via a predetermined storage medium, or may be directly output to the placing support device 300 by data communication.

[0027] The measuring instrument 200 is a device that acquires the distance and position of a measurement object (measurement target point) in three dimensions, and is configured to be able to transfer survey data to other devices via a predetermined storage medium or by data communication. In the present embodiment, a total station having the functions of a theodolite for measuring angles and a laser rangefinder for measuring distances is used.

[0028] In the present invention, when a formwork for placing the concrete of the wall railing is installed on the floor slab body of the precast floor slab to be manufactured using the measuring instrument 200, the position and dimensions of the formwork are measured to obtain the actual measured data of the formwork. Further, in the present invention, using the measuring instrument 200, the position and outer dimensions of the wall railing of the precast floor slab to be manufactured after constructing the wall railing, that is, the existing precast floor slab, are measured to obtain the actual measured data. The measuring instrument 200 has a fixed relative position with respect to the precast floor slab to be manufactured.

[0029] The placing support device 300 is composed of a conventionally well-known information processing device. The placing support device 300 may be implemented by installing a program on a computer, or may be implemented as dedicated hardware. The placing support device 300 may be implemented in one device, or may be distributed and implemented in a plurality of devices. An example of the latter is a client-server type implementation form. In the present embodiment, the placing support device 300 is implemented by installing a program on a tablet terminal.

[0030] The placing support device 300 includes a corrected design data acquisition unit 310 that acquires corrected design data, an actual measured data acquisition unit 320 that acquires the actual measured data of the formwork obtained by the measuring instrument 200 and the actual measured data after constructing the wall railing, a placing support function unit 330, and a storage unit 340. The placing support device 300 may further include a data output unit 350 that outputs each data obtained by the measuring instrument 200 to the design support device 100.

[0031] The corrected design data acquisition unit 310 acquires the corrected design data from the design support device 100 and stores it in the storage unit 340. The corrected design data may be acquired via a predetermined storage medium, may be acquired from the design support device 100 by data communication, or may be acquired by a worker inputting the data displayed (output) on the design support device 100.

[0032] The actual measurement data acquisition unit 320 acquires the formwork actual measurement data and the actual measurement data after constructing the wall height railing from the measuring instrument 200 and stores them in the storage unit 340. Each actual measurement data may be acquired via a predetermined storage medium, directly acquired from the measuring instrument 200 by data communication, or acquired by input from a supervisor or worker.

[0033] Based on the corrected design data of the precast floor slab to be manufactured obtained, the placing support function unit 330 can display the position and girder gradient of the floor slab body to be installed on the gantry before formwork manufacturing, and the position and dimensions (target values) of the formwork to be manufactured for concrete placing of the wall height railing. The position and dimensions of the formwork can be calculated from the corrected design data according to a predetermined rule. Further, the placing support function unit 330 can display, together with the target values, the position and dimensions (measured values) of the formwork for concrete placing of the wall height railing of the precast floor slab to be manufactured measured using the measuring instrument 200, and the difference between the target values and the measured values. The placing support function unit 330 can perform a pass / fail determination based on the difference between the target values and the measured values and display the determination result.

[0034] In addition, the placing support function unit 330 can display the corrected design data of the precast floor slab to be manufactured obtained. Further, the placing support function unit 330 can display, together with the corrected design data, the actual measurement data of the precast floor slab to be manufactured after constructing the wall height railing, that is, the precast floor slab already manufactured, measured using the measuring instrument 200, and the difference between the corrected design data and the actual measurement data. The placing support function unit 330 can perform a pass / fail determination based on the difference between the corrected design data and the actual measurement data and display the determination result.

[0035] An example of the display screen of the placing support device 300 is shown in FIGS. 4 to 6. The examples in FIGS. 4 to 6 display the measured data of the precast floor slab after the construction of the wall railing in various forms. FIG. 4 is a screen that displays the floor slab length of the measured precast floor slab in order to determine the quality of the actual road width with respect to the designed width. FIG. 5 shows the difference between the measured position of the wall railing of the precast floor slab and the corrected design data in order to determine the quality of the position of the wall railing. FIG. 6 shows the corrected design data, the measured data, and the difference in order to determine the quality of the dimensions (width and height) of the precast floor slab.

[0036] The data output unit 350 outputs each data acquired by the measuring instrument 200 to the design support device 100 via a predetermined storage medium or by data communication. Further, the data output unit 350 can create and output form data based on each data acquired by the measuring instrument 200.

[0037] Next, referring to FIG. 1 again, the process of manufacturing the replacement precast floor slab to be manufactured will be described. First, at the factory, the survey data of the total station surveyed on site is transferred / input to the design support device 100, and the target design data of a plurality of precast floor slabs to be manufactured is created from the survey data using the design support device 100 (step S21).

[0038] Next, using the design support device 100, the measured data of the precast floor slab already manufactured and the target design data of the precast floor slab to be manufactured are compared, and the corrected design data obtained by correcting the target design data is set (step S22). When there is no precast floor slab already manufactured, that is, when manufacturing the first precast floor slab, the target design data is used as the corrected design data. The corrected design data of the precast floor slab to be manufactured is input to the placing support device 300.

[0039] Next, the worker causes the casting support device 300 to display the corrected design data of the precast floor slab to be manufactured, as well as the position and dimension data of the formwork, and installs the floor slab body on the gantry at the specified position and vertical and horizontal gradients with reference to this data, and manufactures a formwork for concrete casting of the wall height railing (step S23). Next, the supervisor or the worker measures the formwork for concrete casting of the wall height railing using the measuring instrument 200, inputs the measured formwork data into the casting support device 300, checks the difference between the target value and the measured value in the casting support device 300, and makes a pass / fail determination (step S24). Note that the pass / fail determination step in step S24 corresponds to the first pass / fail determination step described in the claims.

[0040] Next, the worker casts concrete into the manufactured formwork to construct the wall height railing of the precast floor slab (step S25). Next, the worker uses the measuring instrument 200 to obtain the measured data of the position and outer dimensions of the wall height railing of the precast floor slab after the construction of the wall height railing, that is, the precast floor slab that has already been manufactured, inputs this measured data into the casting support device 300, checks the difference between the corrected design data and the measured data in the casting support device 300, and makes a pass / fail determination (determination of the conformity of the as-built shape) (step S26). Further, the measured data of the precast floor slab that has already been manufactured and measured using the measuring instrument 200 is input into the design support device 100 (step S27). Note that the pass / fail determination step in step S26 corresponds to the second pass / fail determination step described in the claims.

[0041] Through the above steps, the first precast floor slab can be manufactured. Then, by repeatedly implementing the above steps S22 to S27, the second and subsequent precast floor slabs can be sequentially manufactured. Here, it should be noted that the order of the precast floor slabs to be manufactured next does not necessarily have to be adjacent to the precast floor slab that has already been manufactured. This is because sufficient as-built quality, particularly a shape along the road alignment, is achieved through the correction process for the design in the design support device 100. Therefore, the manufacturing order of the precast floor slabs is irrelevant.

[0042] The precast floor slab that has been manufactured is stored in a predetermined storage facility. Subsequently, at the bridge site, the removal work of the existing floor slab is carried out (step S12). Then, the precast floor slab that has been manufactured is transported to the site and arranged and installed in the bridge axis direction in a predetermined order (step S13). Finally, the filling part between the precast floor slabs is formed. Through the above processes, the replacement work of the precast floor slab of the bridge is completed.

[0043] Thus, according to this embodiment, the wall height column of the precast floor slab to be manufactured is constructed using the corrected design data obtained by correcting the target design data. Here, the correction process is calculated based on the measured data of the position and outer dimensions of the wall height column constructed on the precast floor slab that has been manufactured and the target design data of the precast floor slab to be manufactured. As a result, the finished product quality of the precast floor slabs to be sequentially manufactured is very high, and even when installed at the site, it can have a high finished product quality and be shaped along the road alignment. Therefore, the process of temporarily assembling the floor slab bodies of multiple precast floor slabs on a gantry, as in the conventional construction method, becomes unnecessary. Also, the manufacturing order of the precast floor slabs can be arbitrary. From the above, the manufacturing cost is low, and the process can be shortened. Furthermore, since the correction process is based on objective information such as measured data and target design data, even a person with little experience can easily perform the work, and thus it becomes less dependent on human factors.

[0044] In particular, in this embodiment, in the design support device 100, the survey data, target design data, corrected design data, and measured data can be arbitrarily superimposed and displayed in 3D. Therefore, the design process and correction process of the precast floor slab can be carried out while intuitively confirming whether it has the shape along the road alignment. For this reason, even a person with little experience can easily perform the work, and thus it becomes less dependent on human factors.

[0045] Also, in this embodiment, with the placing support device 300, at the placing site, it is possible to easily perform the pass / fail judgment during formwork manufacturing and the pass / fail judgment of the precast floor slab with the wall height column constructed (the pass / fail judgment of the finished shape). Therefore, the manufacturing efficiency is high.

[0046] As described above in detail for one embodiment of the present invention, the present invention is not limited to the above embodiment, and various improvements and changes may be made without departing from the gist of the present invention.

[0047] For example, in the above embodiment, each time a precast floor slab was manufactured, the precast floor slab was actually measured, and the measured data was input into the design support device 100. However, the measured data may be input into the design support device 100 collectively for a plurality of precast floor slabs. Thereby, since the manufacturing processes of the precast floor slabs can be processed in parallel for a plurality of sheets, it is suitable in terms of shortening the construction period.

[0048] Also, in the above embodiment, the precast floor slab in the case of replacing the precast floor slab of the entire cross-section in a predetermined section of the bridge was described. However, the present invention can also be implemented for a precast floor slab used for half-section construction.

Explanation of Signs

[0049] 100... Design support device 110... Survey data acquisition unit 120... Measured data acquisition unit 130... 3D CAD function unit 140... Storage unit 150... Corrected design data output unit 200... Measuring instrument 300... Placing support device 310... Corrected design data acquisition unit 320... Measured data acquisition unit 330... Placing support function unit 340... Storage unit 350... Data output unit

Claims

1. A method for constructing a wall railing on a precast floor slab, comprising: a wall railing measurement step of measuring the position and external dimensions of the wall railing constructed on the first precast floor slab before installation on site to obtain measurement data; a correction step of comparing the measurement data with the target design data of the second precast floor slab on which the wall railing is to be constructed and obtaining corrected design data by correcting the target design data based on the comparison result; a placing step of placing concrete on the second precast floor slab using the corrected design data to construct the wall railing. A method for constructing a wall railing on a precast floor slab, characterized by the above.

2. The second precast floor slab is installed between two of the first precast floor slabs on site, and in the correction step, the target design data of the second precast floor slab is compared with the measurement data of the wall railings of the two first precast floor slabs, and the target design data is corrected based on the comparison result. The method for constructing a wall railing on a precast floor slab according to Claim 1, characterized by the above.

3. The placing step includes: a formwork placement step of arranging a formwork for placing concrete for the wall railing on the second precast floor slab using the corrected design data; a formwork measurement step of measuring the position and dimensions of the formwork to obtain formwork measurement data; a first pass / fail determination step of comparing the formwork measurement data with the corrected design data to perform a pass / fail determination. The method for constructing a wall railing on a precast floor slab according to Claim 1 or 2, characterized by the above.

4. The wall railing measurement step includes a second pass / fail determination step of comparing the measurement data of the wall railing of the first precast floor slab with the target design data or the corrected design data of the first precast floor slab to perform a pass / fail determination. The method for constructing a wall railing on a precast floor slab according to Claim 1 or 2, characterized by the above.

5. The method for constructing a wall railing on a precast floor slab according to Claim 1 or 2 is used to construct the wall railing of the second precast floor slab, and the second precast floor slab with the constructed wall railing is used as a new first precast floor slab, and the method for constructing a wall railing on a precast floor slab according to Claim 1 or 2 is repeatedly implemented for the new second precast floor slab. A method for constructing a wall railing on a precast floor slab, characterized by the above.

6. The computer stores target design data in advance, and in the wall height railing measurement step, the measured data is input into the computer. Furthermore, it includes a step of superimposing and displaying the measured data and the target design data on the computer to simulate the shape along the road alignment by the wall height railing of the precast floor slab. The method for constructing a wall height railing of a precast floor slab according to claim 1 or 2, characterized by the above.

7. A support system for supporting the construction of a wall height railing on a precast floor slab, comprising a wall height railing measurement data acquisition unit that acquires measured data of the position and outer dimensions of the wall height railing constructed on the first precast floor slab before being installed on site, and a corrected design data creation unit that compares the measured data with the target design data of the second precast floor slab on which the wall height railing is to be constructed and creates corrected design data by correcting the target design data based on the comparison result, and is equipped with a design support device. The wall height railing construction support system for a precast floor slab, characterized by the above.

8. Comprising a corrected design data acquisition unit that acquires the corrected design data created by the design support device, a measured data acquisition unit that acquires formwork measured data obtained by measuring the position and dimensions of the formwork for placing concrete for the wall height railing on the second precast floor slab, and a first pass / fail determination unit that compares the formwork measured data with the corrected design data to perform a pass / fail determination, and is equipped with a placement support device. The wall height railing construction support system for a precast floor slab according to claim 7, characterized by the above.

9. Comprising a corrected design data acquisition unit that acquires the corrected design data created by the design support device, a measured data acquisition unit that acquires measured data of the position and outer dimensions of the wall height railing constructed on the first precast floor slab, and a second pass / fail determination unit that compares the measured data with the corrected design data of the first precast floor slab to perform a pass / fail determination, and is equipped with a placement support device. The wall height railing construction support system for a precast floor slab according to claim 7, characterized by the above.

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