JP5453674B2 - Precast concrete wall erection accuracy check method - Google Patents

Description

  The present invention relates to a method for confirming the erection accuracy of a precast concrete wall.

Conventionally, in building construction, when attaching a precast concrete wall (hereinafter referred to as a PC wall) on the side, it is an important item that determines the exterior of the building, and high-precision mounting is required.
Therefore, in the construction work of the PC wall, it is common that a work scaffold is assembled so as to project outward along the outer wall of the building, and an operator aligns the PC wall on the scaffold. (For example, refer to Patent Document 1). That is, the vertical and horizontal gaps can be confirmed even from the inside of the building, but the depth position on the outer wall side (outer surface side) (exiting / exiting with the adjacent PC wall) is difficult to confirm from the back side. The outer surface of the PC wall is confirmed from the scaffold.

JP 2007-23702 A

However, the conventional method for building a PC wall has the following problems.
That is, in the method of installing the work scaffold on the outer wall as shown in Patent Document 1, there is a problem that the work time and cost for installing and dismantling the work scaffold increase, and there is room for improvement in that respect.

  The present invention has been made in view of the above-described problems, and provides a method for confirming the accuracy of precast concrete wall installation by reducing the labor and cost by eliminating the need for installing a work scaffold. For the purpose.

  In order to achieve the above object, in the precast concrete wall erection accuracy confirmation method according to the present invention, the precast concrete wall forming the outer wall of the building is used for alignment with the existing precast concrete wall. A shape measurement sensor that measures the position of the outer surface of the precast concrete wall in the depth direction is installed at a position where the predetermined range of the outer surface of the precast concrete wall can be observed from the outside of the building. Measuring the position in the depth direction of the precast concrete wall to be built and the existing precast concrete wall adjacent thereto with a shape measurement sensor, and outputting the amount of displacement between the positions in the depth direction to the display unit, While checking the display, There has been characterized by a step of positioning a pre-cast concrete walls Tatekomu set to be zero for existing precast concrete wall.

In the present invention, by arranging the display unit in the building, it is possible to confirm the position in the depth direction of the precast concrete wall to be built with respect to the existing precast concrete wall as a reference for alignment by the display unit in the building. it can. For this reason, the shape measurement sensor is used for real-time measurement, and the position of the precast concrete wall to be built is checked on the display unit while observing the outer surface of the precast concrete wall, so that the deviation error is zero. By matching, it can be accurately built into the existing precast concrete wall. As a result, the joints on the outer surface side of the precast concrete walls have no irregularities, and a building having an excellent appearance can be constructed.
And since it becomes possible to align the precast concrete walls just by providing the shape measurement sensor outside the building, the outer surface of the precast concrete wall is placed on the work scaffold provided along the outer wall as in the past. There is no need to check the position.

  Further, in the precast concrete wall erection accuracy confirmation method according to the present invention, when the surface is a flat surface, the measurement position by the shape measurement sensor of the precast concrete wall to be erected is located in the adjacent lateral direction and below at the time of alignment. More preferably, the corners are three corners on the existing precast concrete wall side.

In the present invention, the position of the three corners of the precast concrete wall to be built is measured by the shape measuring sensor, so that the posture of the precast concrete wall to be built can be confirmed three-dimensionally. It is possible to perform alignment in consideration of the inclination with respect to the wall, and it is possible to perform alignment with higher accuracy.
At the same time as measuring with the shape measurement sensor, the position of the precast concrete wall to be built is photographed with a camera, etc., and the image is superimposed on the display to display the orientation of the precast concrete wall to be built. Since it becomes easy, there exists an advantage which can reduce the misidentification of the operator who confirms a display part.

  Moreover, in the precast concrete wall erection accuracy confirmation method according to the present invention, it is preferable that the shape measuring sensor is provided at the projecting tip of the overhanging arm projecting outward from the building.

  In the present invention, the shape measuring sensor is supported at the tip of the overhang arm, and is projected outward from the building so that a predetermined range of the outer surface of the precast concrete wall can be observed from the outside of the building. Can do. Further, by providing the overhang arm with functions such as up / down / left / right, expansion / contraction or rotation, the position, orientation, etc. of the overhanging shape measurement sensor can be adjusted as appropriate.

  According to the precast concrete wall erection accuracy confirmation method of the present invention, the position in the depth direction of the precast concrete wall to be built with respect to the existing precast concrete wall that is the reference for alignment is measured using a shape measurement sensor, The precast concrete wall to be built can be accurately aligned with the existing precast concrete wall while checking with the display unit. Therefore, a work scaffold for visual confirmation from the outside of the outer wall is not required, and the labor and cost for the scaffold can be reduced.

It is a perspective view which shows the erection accuracy confirmation method of PC wall by embodiment of this invention. It is a figure which shows the display state of a monitor. It is a horizontal sectional view which shows the alignment state of PC wall, (a) is a figure which shows the state before alignment, (b) is a figure which shows the state after alignment.

  Hereinafter, the precast concrete wall erection accuracy confirmation method according to the embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the precast concrete wall erection accuracy confirmation method according to the present embodiment uses a precast concrete wall (hereinafter simply referred to as “PC wall”) that forms the outer wall of a building 2 such as a high-rise building. It is used when aligning with the PC wall and installing.
Here, FIG. 1 shows a construction floor F1 for constructing the PC wall 1 in the building 2 and a lower floor F0 just below it.
In the PC wall 1, if necessary, the PC wall being built is denoted by reference numeral 1A, the existing PC wall adjacent to the PC wall 1A to be built is denoted by reference numeral 1B, and the PC wall 1 is laterally moved downward. This will be described below as the adjacent existing PC wall 1C.

  As the PC wall 1, a well-known one used as an outer wall is adopted. The PC wall 1 has a flat plate shape (surface is flat) having a certain thickness, and is a lifting machine such as a tower crane installed for building the building 2. It is built in the predetermined outer wall position in a state of being suspended by. The PC walls 1, 1 adjacent to each other in the vertical and horizontal directions are fixed by appropriate joining means.

  As shown in FIG. 1, the method of checking the accuracy of building the PC wall 1 is the depth direction (Z-axis direction) of the outer surface of the PC wall 1 at a position where a predetermined range of the outer surface of the PC wall 1 can be observed from the outside of the building 2. The shape measuring sensor 3 for measuring the position of the PC wall 1A and the existing PC walls 1B and 1C adjacent to the PC wall 1A to be built are measured in the depth direction Z by the shape measuring sensor 3, and both depths are measured. The process of outputting the amount of displacement of the direction position to the monitor 5 (display unit) shown in FIG. 2 and confirming the monitor 5, the PC wall 1A to be built so that the error of the amount of displacement becomes zero is installed on the existing PC And aligning with the walls 1B and 1C.

  The shape measuring sensor 3 is provided at a protruding tip 4a of a long overhanging arm 4 protruding outward from the building 2, and is built on the measuring surface 3a of the shape measuring sensor 3 having a light emitting portion and a light receiving portion. The PC wall 1A and the PC walls 1B and 1C adjacent to the PC wall 1A and the PC walls 1B and 1C are arranged at a position where a predetermined range can be set within the measurement range (the broken line range shown in FIG. 1). In addition, as the shape measurement sensor 3, a distance sensor using a laser, infrared rays, light, or the like capable of measuring a distance to an object is used.

Although not specifically shown, the shape measuring sensor 3 can be appropriately moved together with the overhanging arm 4 in accordance with the position of the PC wall 1A to be built, and the orientation and the like can also be adjusted.
The overhanging arm 4 can be structured to be supported by a gantry (not shown) that is movably supported in three directions in the XYZ directions.

  The measurement position by the shape measuring sensor 3 on the PC wall 1A to be built is three points (first to third measurement points P11, P12, This is the corner of P13). In addition, the measurement positions by the shape measurement sensor 3 on the existing PC walls 1B and 1C that serve as a reference for the PC wall 1A to be built correspond to the first to third measurement points P11 to P13 of the PC wall 1A to be built. There are four points (first to fourth measurement points P01, P02, P03, P04) (see FIG. 2). In addition, the measurement point of the code | symbol P12 of 1 A of PC walls to build in FIG.1 and FIG.2 respond | corresponds to both the measurement points of the code | symbol P02 and P04.

As shown in FIG. 2, the measurement values at the measurement points P01 to 04 and P11 to P13 are taken into a calculation unit (not shown) and correspond to the first to third points P11 to P13 of the PC wall 1A to be built. A shift amount indicating an error in the depth direction Z with respect to the existing PC walls 1B and 1C is calculated and output to the monitor 5.
Here, the monitor 5 is provided at a position where a worker who positions the PC wall 1A to be built from the building 2 or a signal person who instructs the worker can confirm.

Next, the construction accuracy confirmation method for the PC wall 1 described above will be described more specifically based on the drawings.
As shown in FIG. 1 and FIG. 3A, first, the shape measuring sensor 3 is projected from the construction floor F1 to the outside of the building 2 and set at a predetermined position.
Subsequently, the PC wall 1A to be built that is suspended by a crane or the like is arranged at a rough assembly position, and the measurement points P01 to P04, P11 to the PC wall 1A to be built and the existing PC walls 1B and 1C are arranged. P13 is measured by the shape measuring sensor 3.

As shown in FIG. 2, the measurement values measured by the shape measurement sensor 3 are the measurement points P01 to P04 of the existing PC walls 1B and 1C corresponding to the measurement points P11 to P13 of the PC wall 1A to be built. An error (shift amount) in the depth direction Z is calculated, and the calculated value is displayed on the monitor 5.
In other words, by placing the monitor 5 in the building 2, the position in the depth direction Z of the PC wall 1A to be built with respect to the existing PC walls 1B and 1C, which is the reference for alignment, is confirmed by the monitor 5 in the building 2 can do.

  Here, in FIG. 2, the shift amounts at the measurement points P11, P12, and P13 of the PC wall 1A to be built are described as +25, +5, and −10, respectively. That is, when the numerical value of the shift amount displayed on the monitor 5 is + (plus), it is located outside the outer wall surface 2a in the depth direction Z, and when it is-(minus), it is also more than the outer wall surface 2a. It can be confirmed that it is located inside (inside the building 2) in the depth direction Z (see FIG. 3A).

  Similarly to the shape measurement sensor 3, a camera or the like (not shown) is attached to the protruding tip 4 a (FIG. 1) of the overhang arm 4, and at the same time as the measurement by the shape measurement sensor 3, the PC wall 1 </ b> A is aligned. By photographing the state with the camera or the like and displaying the image superimposed on the measurement display on the shape measurement sensor 3 displayed on the monitor 5, it becomes easy to understand the posture of the PC wall 1A to be built. It is also possible to reduce misidentification of the operator who checks the monitor 5.

Then, as shown in FIG. 3 (b), the shape measurement sensor 3 performs measurement in real time, and while observing the outer surface of the PC wall 1, the posture of the PC wall 1 </ b> A to be built is confirmed on the monitor 5. By aligning so that the amount error is zero, it is possible to accurately build in the existing PC walls 1B and 1C. Thereby, the unevenness | corrugation is lose | eliminated in the junction part of the outer surface side of PC wall 1, and the building excellent in the external appearance can be constructed | assembled.
Note that the PC wall 1A to be built may be aligned in the lateral direction (X-axis direction) and the vertical direction (Y-axis direction) with the end faces of the existing PC walls 1B and 1C, respectively.

  Further, since it is possible to align the PC walls 1 simply by providing the shape measuring sensor 3 on the outside of the building 2, the outer surface of the PC wall on the work scaffold provided along the outer wall as in the prior art. There is no need to check the position of

  Further, the position of the three corners of the PC wall 1A to be built (first to third measurement points P11 to P13) is measured by the shape measuring sensor 3, so that the posture of the PC wall 1A to be built is three-dimensional. This makes it possible to perform alignment in consideration of the inclination of the existing PC walls 1B and 1C, and more accurate alignment can be performed.

As described above, in the precast concrete wall erection accuracy confirmation method according to the present embodiment, the position of the PC wall 1A to be installed in the depth direction Z with respect to the existing PC walls 1B and 1C as a reference for alignment is measured by the shape measuring sensor 3. The PC wall 1A to be built can be accurately positioned with respect to the existing PC walls 1B and 1C while being measured using the monitor 5 and being confirmed by the monitor 5.
Therefore, a work scaffold for visual confirmation from the outside of the outer wall is not required, and the labor and cost for the scaffold can be reduced.

The embodiment of the precast concrete wall erection accuracy confirmation method according to the present invention has been described above. However, the present invention is not limited to the above embodiment, and can be appropriately changed without departing from the scope of the present invention. is there.
For example, in the present embodiment, the shape measurement sensor 3 is supported by the long overhanging arm 4, but is not limited thereto. For example, a shape measuring sensor 3 may be incorporated, and a dedicated measuring device that can move in the building and project the shape measuring sensor 3 toward the outside of the building 2 at a predetermined position may be adopted.
Further, the number of shape measurement sensors 3 is not limited to one, and the alignment accuracy may be improved by observing with a plurality of shape measurement sensors 3.

  Furthermore, in this embodiment, there are three measurement points P11 to P13 on the PC wall 1A to be built, and four measurement points P01 to P04 on the existing PC walls 1B and 1C corresponding to these, but the PC wall 1 The position and quantity of the measurement points are not particularly limited, and can be appropriately set according to conditions such as the size of the PC wall 1.

  Furthermore, the display method of the shift amount on the monitor 5 is also an example of this embodiment, and the present invention is not limited to this, and other display methods can be employed.

1 PC wall (precast concrete wall)
1A PC wall to be built 1B, 1C Existing PC wall 2 Building 3 Shape measurement sensor 4 Overhang arm 5 Monitor (display unit)
P01, P02, P03, P04 Measurement points on existing PC walls P11, P12, P13 Measurement points on PC walls to be built

Claims (3)

A precast concrete wall forming accuracy check method used when a precast concrete wall forming an outer wall of a building is aligned with an existing precast concrete wall and built.
Installing a shape measurement sensor for measuring a position in the depth direction of the outer surface of the precast concrete wall at a position where a predetermined range of the outer surface of the precast concrete wall can be observed from the outside of the building;
Measuring the position in the depth direction of the precast concrete wall to be built and the existing precast concrete wall adjacent to the precast concrete wall by the shape measurement sensor, and outputting a shift amount between the positions in the depth direction to the display unit; ,
While checking the display unit, aligning the precast concrete wall to be built so that the error of the deviation amount becomes zero with respect to the existing precast concrete wall;
A method for confirming the accuracy of building a precast concrete wall, characterized by comprising:   In the case where the surface is flat, the measurement position of the precast concrete wall to be built by the shape measurement sensor is the corners of the three points on the side of the existing precast concrete wall that are located adjacent to each other at the time of alignment and in the lower direction. The method for confirming the accuracy of building a precast concrete wall according to claim 1. 3. The method for checking the accuracy of building a precast concrete wall according to claim 1, wherein the shape measuring sensor is provided at a protruding tip of an overhanging arm that protrudes outward from the building.