JP2000314624A - Survey system in slip form construction method and slip form construction method employing that survey system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure a plurality of positions of a slip form automatically by one person and to enhance construction accuracy by facilitating the correction work of form. SOLUTION: A slip form 2 is arranged along the wall face of a tower-like structure 1 to be constructed and concrete is placed in the slip form 2 while sliding up. The survey system in such a slip form construction method, comprises a plurality of laser light emitting means 4 mounted on a base 3 in the tower-like structure 1, a plurality of light receiving means 5 mounted on the slip form 2 in the direction of vertical line of the plurality of laser light emitting means 4, means 6a for calculating the positional coordinate at each measuring point based on the detection signal from each light receiving means, means 7a for operating the displacement at each measuring point by comparing the calculated positional coordinate with the known coordinate of the laser light emitting means 4, and means 7b for displaying the operated displacement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a slip foam method for constructing a tower-like structure such as a chimney, a silo, a building and the like.

[0002]

2. Description of the Related Art In a slip-form method, a slip-form form having a divided portal structure is arranged along a wall of a skeleton to be constructed, and the slip-form form is supported by a rod embedded in the skeleton. , Concrete was poured into the slip form while sliding up the rod as a pillar with a hydraulic jack,
This is a method of constructing a tower reinforced concrete structure.

In the construction management of this tower-like structure, it is necessary to rapidly measure the height, center position (fall), rotation amount of the cylinder, radius, and wall pressure of the cylinder. When performing this measurement, it is conceivable to employ a verticality measurement system proposed by the present applicant in Japanese Patent Application Laid-Open No. 4-69515. This measurement system includes a turntable fixed to known coordinates on the ground surface, a light emitting unit disposed on the turntable and projecting a laser in a vertical direction, and a light receiving unit fixed to the head of the device under test. And a controller for moving the known coordinates on the ground surface onto the measurement floor and measuring the position of the object to be measured on the measurement floor.

[0004]

By the way, in the construction management of a tower-like structure using a slip form form,
It is necessary to quickly check the deformation state of the form every time the slip-form form slides up, and to promptly feed back to the work of correcting the form without disturbing the cycle time at the time of building the tower-like structure. However, when applying the above conventional measurement system to the slip form method,
A plurality of sets of laser emitting units, light receiving units and controllers (2
~ 4 sets) must be provided, and in order to measure these multiple positions at the same time, a plurality of people must press the measurement start button at the same time, and it takes time to organize the measurement data at the multiple positions. There is a problem that.

The present invention has been made to solve the above-mentioned conventional problems and problems, and enables a plurality of positions of a slip form mold to be automatically measured by one person at the same time and facilitates the work of correcting the form. It is an object of the present invention to provide a survey system in a slip form method capable of providing information that can be performed and improving construction accuracy, and a slip form method using the survey system.

[0006]

In order to achieve the above object, a surveying system according to the present invention arranges a slip-form form along a wall surface on a tower-like structure to be constructed and slides the slip-form form. In the slip form method of placing concrete in a form while raising it, a plurality of laser light emitting means installed on a base in a tower-like structure and a slip form mold in the vertical direction of the plurality of laser light emitting means A plurality of light receiving means installed on the frame, a means for calculating position coordinates of each measurement point based on a detection signal of each light receiving means, and a comparison between the calculated position coordinates and the known coordinates of the laser emitting means. A slip form according to the present invention, comprising: a displacement amount calculating means for calculating a displacement amount of each measurement point; and a displacement amount displaying means for displaying the calculated displacement amount. The method uses a slip-form method in which a slip-form form is placed along a wall surface on a tower-like structure to be built, and concrete is poured into the form while the slip-form form is slid up. A plurality of laser emitting means installed on a base in the
A plurality of light receiving means installed on the slip-form form in the vertical direction of the plurality of laser light emitting means; a means for calculating position coordinates of each measurement point based on a detection signal of each light receiving means; Using a surveying system including a displacement amount calculating unit that calculates the displacement amount of each measurement point by comparing the calculated position coordinates with the known coordinates of the laser emitting unit, and a displacement amount displaying unit that displays the calculated displacement amount, When the displacement amount exceeds a predetermined value, the slip work form is corrected.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing one embodiment of a surveying system in the slip form method of the present invention.

On the upper part of the tower-like structure 1, a slip form form 2 (shown by a circumference for convenience) is installed along the wall surface. On the base 3 in the tower-like structure 1, four laser emitting means 4 are installed. The installation condition is that the installation is performed so that the midpoint of the straight line connecting the opposing laser light emitting means 4 becomes the center of the tower-like structure 1.

On the other hand, light receiving means 5 is attached to the slip-form mold 2 so as to face the four laser light emitting means 4 in the vertical direction. The detection signal obtained by each light receiving means 5 is sent to the position detecting means 6a of the controller 6, where the position coordinates of each measuring point are calculated. The calculated position coordinates are compared with the known coordinates of the laser emitting means 4 in the displacement calculating means 7a of the personal computer 7, and the displacement of each measurement point is calculated.
It is output to a displacement amount display means 7b composed of a screen, a printer, or the like. Then, based on the displacement amount, the displacement form correcting means 8 corrects the slip form formwork. As the correction method, a well-known method such as adjusting the inclination of the rod, the hydraulic jack, and the yoke is employed.

The surveying stand 9 is provided inside the tower-like structure 1.
Is constructed, and a total station (a three-dimensional surveying device using an optical distance meter) 10 and a personal computer 1 are mounted on a surveying stand 9.
0 'is set. The total station 10 and the personal computer 10 ′ are systems for performing precise surveying while collimating the mirrors 11 installed at a plurality of locations on the slip form form 2.

FIG. 2 shows the laser emitting means 4 described with reference to FIG.
FIG. 3 is a cross-sectional view for explaining a light receiving unit 5. The slip form form 2 includes a yoke 2a having a portal structure, an inner working floor 2b, and an outer working floor 2 formed on the yoke 2a.
c, an upper working floor 2d and formwork 2e, 2f. The yoke 2a is supported by a rod 12 embedded in the tower-like structure 1, and the hydraulic jack 13 is used to form the formwork while gradually sliding up the rod 12 as a support. Concrete is poured into 2e and 2f. A light receiving means 5 is attached to the lower surface of the inner working floor 2b, a controller 6 and a personal computer 7 are installed on the inner working floor 2b, and a mirror (or prism) 11 is provided so as to be tiltable as shown by an arrow in the figure. Have been.

The laser emitting means 4 comprises a base table 4a, a rotary table 4b, and an invisible light laser oscillator 4c.
The base 4a is a jig for fixing the turntable 4b to a position that has been previously marked, and the turntable 4b is moved in one direction at a preset number of rotations by a sensor attached to the lower part of the laser oscillator 4c. It has a rotating structure. Turntable 4
b corrects the measurement accuracy in the vertical direction. Even if the light emitting position from the laser oscillator 4c is shifted due to the positional shift of the base table 4a, the laser beam may be shifted from the true vertical line during a long distance. In some cases, the turntable 4
By rotating b one or more times, the true position in the vertical direction is determined.

The laser oscillated by the laser light emitting means 4 while being rotated is measured 256 times (or 126 times) in total by the upper light receiving means 5, and the average value is calculated to measure the laser oscillation position. The light receiving means 5 has a visible light cutoff filter, and is constituted by a photodiode matrix for detecting a position in the X and Y directions. It calculates measurement parameters such as luminance and a measurement area, and transmits digital data to the controller 6. The data obtained by the light receiving means 5 is transmitted to the controller 6 at predetermined intervals.

FIG. 3 shows an example of the control accuracy of the tower-like structure by the slip-form method. The construction management items of the tower-like structure are five items of radius, wall thickness of the slip-form formwork, misalignment between the tower-like structure and the slipform formwork, rotation (twist), and level (height). Generally, the control value is set to １ ／ of the allowable accuracy, and a correction operation is performed if the value exceeds this value during the execution of the slip form.

In order to measure the accuracy of the above-mentioned five items, in this embodiment, as shown in FIG. 4, two columns of a measurement for confirming the molding accuracy and a measurement for correcting during sliding (slide) are provided. The present invention is particularly characterized by the latter survey.

The former measurement for confirming the molding accuracy is performed once /
1 day, as shown in FIG. 1, mirrors 11 are installed at 30 points inside the slip-form formwork 2, and their coordinate positions (x, y, z) are measured by the total station 10, and this is transferred to a portable personal computer. The height, the misalignment, the rotation angle, and the radius of the tower-like structure currently being cast are calculated, and the wall thickness is measured by the convex.

The latter measurement for correcting the formwork involves measuring the misalignment and the rotation angle at four points of the slip form form 2 using the laser emitting means 4 and the light receiving means 5 (VL device). Is performed once per slide-up, and is appropriately performed at a frequency that can be confirmed when correcting the mold. The height is measured at one point on the mold with steel tape. Note that these measured values are compared with the measurement results of the precise survey at the total station 10 and are fed back to the survey for correcting the formwork.

FIG. 5 is a diagram for explaining the misalignment and the rotation angle to be measured. Center position O at the bottom of the tower-like structure 1
An X plane including the vertical line V,
A Y plane perpendicular to the plane is set, and an X ′ plane including the vertical line V ′ and a Y ′ plane perpendicular to the X ′ plane with respect to a vertical line V ′ passing through the center position O ′ of the slip form form 2 are set. Is set, and the misalignment δ and the rotation angle θ of the center position when the slipform form 2 is deformed are measured.

FIGS. 6 to 8 show the displacement amount display means 7b of FIG.
2 shows an example of a display surface displayed in. In FIG. 6, the slip-form form 2 with respect to the known coordinates (positions of the laser light emitting means 4) A, B, C, and D of the tower-like structure 1 is shown.
The measurement coordinates A ′, B ′, C ′, D ′, the center position coordinates (X, Y), the rotation angle (rotation amount) θ, and the amount of misalignment δ are displayed. Note that the coordinates of the measurement points are X coordinates in the tangential direction. It is possible to easily correct the slip form form 2 based on these deformation amounts.

FIG. 7 shows a control chart of the rotation angle θB at the point B, and FIG. 8 shows a control chart of the misalignment δ. When the measured values exceed the control values from these control charts, the work of correcting the slip form form 2 is performed. The data of the above deformation amount and the management data are 1
Provided promptly in minutes / times, not only to determine whether or not to perform the formwork correction work, but also to be able to quickly confirm the position during formwork correction and facilitate the work of correcting the formwork And the accuracy of construction can be improved.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made. For example, in the above embodiment, the surveying for correcting the slip form form is measured at four points, but the present invention is not limited to this, and two or more points may be measured.

[0022]

As is apparent from the above description, according to the present invention, a plurality of positions of the slip form mold can be automatically measured by one person at the same time, and the slip form mold can be automatically measured based on the simultaneous measurement data. Since the misalignment amount, the rotation amount, and the center coordinate value of the frame are output, the work of correcting the mold can be easily performed, and the construction accuracy can be improved. In addition, by combining with a three-dimensional surveying device, it is possible to perform construction management with high accuracy and less labor.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a surveying system in a slip form method of the present invention.

FIG. 2 is a cross-sectional view for explaining a laser light emitting unit and a light receiving unit described in FIG.

FIG. 3 is a diagram showing an example of management accuracy of a tower-like structure by a slip-form method.

FIG. 4 is a diagram for explaining a surveying method according to the present invention.

FIG. 5 is a diagram for explaining misalignment and a rotation angle to be measured.

FIG. 6 is a diagram showing an example of a display screen displayed on the displacement amount display means of FIG. 1;

FIG. 7 is a diagram showing an example of a display screen displayed on the displacement amount display means of FIG. 1;

8 is a diagram showing an example of a display screen displayed on the displacement amount display means in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tower-shaped structure 2 ... Slip form form 3 ... Base 4 ... Laser emission means 5 ... Light receiving means 6a ... Position coordinate calculation means 7a ... Displacement amount calculation means 7b ... Displacement amount display means

Continuation of the front page (72) Inventor Hitoshi Tanaka 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Norio Moriya 1-2-3 Shibaura, Minato-ku, Tokyo Shimizu Corporation F-term (reference) 2E177 FA02 FA07

Claims (5)

[Claims] 1. A slip-form method in which a slip-form form is arranged along a wall surface on a tower-like structure to be constructed, and concrete is poured into the form while the slip-form form is slid up. A plurality of laser light emitting means installed on a substrate in the structure, a plurality of light receiving means installed on a slip-form form in a vertical direction of the plurality of laser light emitting means, and a detection signal of each light receiving means. Means for calculating position coordinates for calculating the position coordinates of the measuring points; displacement amount calculating means for comparing the calculated position coordinates with the known coordinates of the laser emitting means to calculate the amount of displacement of each measuring point; and the calculated displacement A surveying system comprising: a displacement amount display means for displaying an amount. 2. The surveying system according to claim 1, wherein the displacement amount is a position coordinate and a rotation amount of each measurement point, and a center position of the tower-like structure. 3. A surveying system according to claim 1, wherein a laser oscillated from said laser emitting means is rotated, and a laser oscillation position is measured a plurality of times by a light receiving means. 4. In addition to the surveying system according to claim 1, a plurality of mirrors are installed on the slipform formwork, and these mirrors are collimated by a three-dimensional surveying device to perform precise surveying of the slipform formwork. Surveying system characterized by performing. 5. A slip-form method in which a slip-form form is arranged along a wall surface on a tower-like structure to be constructed, and concrete is poured into the form while the slip-form form is slid up. A plurality of laser light emitting means installed on a substrate in the structure, a plurality of light receiving means installed on a slip-form form in a vertical direction of the plurality of laser light emitting means, and a detection signal of each light receiving means. Means for calculating position coordinates for calculating the position coordinates of the measuring points; displacement amount calculating means for comparing the calculated position coordinates with the known coordinates of the laser emitting means to calculate the amount of displacement of each measuring point; and the calculated displacement Using a surveying system having a displacement amount display means for displaying the amount, and performing a work of correcting the slip form form when the displacement amount exceeds a predetermined value. Omu method.