JPS5939010B2 - Preset positioning construction method for structural pillars in the structural pillar reverse driving method - Google Patents

Description

[Detailed Description of the Invention] The present invention, when erecting a structural pillar in the structural pillar reverse construction method, positions the structural pillar in advance and moves the structural pillar while maintaining that position. This relates to a method of constructing a building while providing support and guidance.

In general, in the structural pillar reverse driving method, a casing tube is first built into the ground at the location to be constructed, then concrete piles are built in the lower part of the shaft excavated inside the tube, and then Construction is carried out in the order in which the structural pillars are erected on top of the concrete piles, but the structural pillars that are connected to the top of the concrete piles will become the pillars of the building, so when erecting them on the concrete piles, High positioning accuracy is required.

Conventionally, the positioning of the above-mentioned structural pillars when erecting them involves hoisting the pillars with a crane or the like, measuring the position where the pillars should be erected with a surveying device such as a transit, and using the crane's rough movements and manual labor. Since the positioning is determined by micro-movements such as the above, it is not only inefficient, but also has the disadvantage that highly accurate positioning is extremely difficult.

To address these shortcomings, a device has been proposed that can detect and correct the core of a column during erection, thereby simultaneously performing erection and pouring of concrete shafts. The disadvantage is that this device cannot be used if there are any protrusions.

The present invention eliminates the drawbacks of the conventional methods when erecting structural pillars, streamlines the erection work, and enables the structural pillar to be erected while supporting and guiding the structural pillar while maintaining high positioning accuracy. This method was developed with the aim of providing a method that allows for high-precision erection, especially for columns with brackets for beam mounting protruding from the structural pillars. The structure of the method is that, in the structure pillar reverse driving method, a casing tube that can be moved forward and backward in two axes (vertical and horizontal) in a horizontal plane, and that An upper positioning device having a support guide member provided in a freely undulating manner is disposed on the inner circumferential side of an annular rotary plate formed to be able to rotate freely on a plane including the two axes, and corresponds to the lower part of the structural pillar. A turn is formed on the inner circumferential wall of the casing tube at a portion that is rotatably fixed along the inner circumference of the tube and movable forward and backward along the two axial directions from the inner circumferential wall side of the casing tube toward the center. A lower positioning device having a support guide member provided in a freely undulating manner is provided on the inner surface of the dynamic support body, and before erecting the structural pillar, the cross-sectional outline of the structural pillar in which the upper positioning device is to be installed is determined. The position of the jig in the two axial directions and the radial angle of the jig are predetermined using the rotation center of the upper positioning device, and the support guide of the rotation center and the lower positioning device is subsequently set. After predetermining the verticality of the structural pillar to be erected based on the center relative to the jig positioned by the member, both of the support guide members are erected, and the structural pillar is suspended, and the upper positioning device and Loosely insert the inner side of each support guide member in the lower positioning device, stop the loosely insert just before the lower end of the structural column comes into contact with the poured concrete, and then collapse the support guide member. It is characterized by being erected while guiding the structure pillars.

Next, an embodiment of the method of the present invention will be described with reference to a diagram showing an example of an apparatus configured to carry out the method.

1 and 2 are a plan view and a front sectional view showing an example of the structure of the upper positioning device according to the present invention, in which 1 is a base frame formed into a rectangular plane, 2 is a base frame formed on the upper surface of the base frame 1, 1 is a plane rectangular Y-axis truck mounted so as to be movable and fixed in the horizontal direction on the plane formed by the base frame 1; 4 is an annular rotary table mounted on the upper surface of the Y-axis truck 2 so that it can be rotated and fixed; The means of transportation include 2 and 3 trolleys each.
A guide mechanism is used, which includes a rail 11.21 interposed between the base frame 1 and the trolley 2 on which they are mounted, and wheels 22.31 guided by the rail 11.21.
As the fixing means, fixing pins 23 and 32 are used which are inserted between the respective carriages 2 and 3, the base frame 1, and the carriage 2.

Further, the means for rotating and fixing the rotary table 4 includes guide rails 33 and rollers 41 interposed between the rotary table 4 and the Y-axis truck 3 on which the rotary table 4 is mounted, and a guide rail 33 and rollers 41 that move the rotary table 4 to the Y-axis truck 3 on which the rotary table 4 is mounted. A fixing ring 42 and a screw 43 are used to tighten it.

Reference numeral 5 denotes a support guide member provided on the upper surface of the rotary table 4 so as to be able to lie down or stand up on the inside in the radial direction. A pivot 53 is attached to the top, and a fixing screw 54 is disposed at this portion to fix the prone position.

The upper positioning device U is constituted by 1 to 5 above, but when the position of the structural pillar to be erected in the X and Y axis directions and the angle in the radial direction are determined in advance by this device, the above structure is generally used. The positioning jig 6 formed in the cross-sectional shape of a true column is supported by the support guide mechanism 5 with the support plate 52 laid down, and each carriage 2.degree. 3 and rotating table 4 are operated respectively.

In this case, since the center 6a of the jig 6 coincides with the center of rotation of the upper positioning device, it goes without saying that the center 6a of the jig 6 should coincide with the neutral axis of the structural column when positioning is performed.

After activating the upper positioning device and determining the position of the center of rotation of the rotary table 4, the support plate 52 is erected to open a wide space inside the rotary table 4, and the actual position suspended by a crane or the like is placed. A structural pillar is suspended by penetrating the inside of the rotary table 4, and the support plate 52 is brought down slightly before the lower end of the pillar comes into contact with, for example, poured concrete, and the guide roller 51 of the plate 52 is suspended. Although it is possible to erect the column in a predetermined position by suspending the column for the remaining distance within the casing tube C while guiding the outer surface of the column in a tangential manner, the angle or perpendicularity of the radial direction of the column can be adjusted more precisely. For pre-positioning, a lower positioning device described below is used in conjunction with the upper positioning device.

3 and 4 are a front sectional view and a plan view showing an example of a lower positioning device, in which 71 has an outer diameter that allows loose insertion into the inner circumferential wall Ci of the casing tube C, and At least three support cylinders 12 are formed with a flange portion 71a standing up on the inner diameter side, and are radially arranged in the radial direction on the side where the flange portion 71a is not formed.
Two of the base rings 11 are arranged with their flange portions 71a facing each other in the direction of the inner wall of the tube C.

Therefore, between the two base rings 71 is the flange portion? The rotating ring 81 is placed on the Ia side, and both rings 81.
81 is housed in a rotary support body constructed by installing brackets 82 at four locations spaced apart by about 90 degrees between the two rings.

In this rotating support, actuating cylinders 83 are respectively provided upright within the brackets 82 on the upper surface of the lower rotating ring 81, and at the middle of each bracket 82 in the height direction.
Support cylinders 84 facing toward the center of the ring 81 are provided in a pivoted manner, and the piston rods 83a of each of the forward operating cylinders 83 and the rear end sides 84b of each of the support cylinders 84 corresponding thereto are connected to a bridge member 85. The support cylinders 84 are connected to each other through a radial direction of the ring 81 so that each support cylinder 84 can be raised or lowered freely in the radial direction of the ring 81.

Note that 86 is a guide roller provided at the tip of the rod 84a of each support cylinder 84, and together with the support cylinder 84 constitutes a support guide member of the lower positioning device.

The rotating support body is constructed by providing four sets of actuation and support cylinders 83 and 84, respectively, and the two base rings 7
It is designed so that it can be rotated at an appropriate angle in the radial direction with respect to 1, and its position can be fixed.

That is, the outer circumferential side of the upper base ring 71 is notched to the inner circumferential side at an appropriate angle to form the guide notch 73, and the bracket 82
While the upper end rear wall 82a is made to protrude from the notch 73 to the upper surface of the base ring 71, the notch 7 in the base ring 71
Rotating cylinder 7 with its rear end fixed on the upper surface near 3
4, the tip of the Ron door 4a and the rear end 82a of the bracket.
It is a connection between the two.

To operate the lower positioning device formed by the base ring 71 to the guide roller 86, first, in the casing tube C, each support guide cylinder 84 is placed in advance on the base ring 7.
Each support cylinder 72 of the base ring 71 is operated while positioning by visual measurement or the like so that the line segment connecting the opposing cylinders 84 facing toward the center of the base ring 71 approximately coincides with the X and Y axes of the upper positioning device. The lower positioning device main body is set in the tube C by doing this.

Next, the guide rollers 8 of each of the above-mentioned support guide cylinders 84
6 to support the lower positioning jig 61, and the rods 84a of each support guide cylinder 84 are moved so that the center 61a of the jig 61 is on a vertical line to the center 6a of the previously positioned upper positioning jig 6. Move it forward and backward to determine its position.

Here, the center 6a of the upper positioning jig 6 is aligned with that of the lower part 6.
The means for checking whether or not the centers 61a of 1 are aligned is to hang a pendulum from the center 6a, or
A method such as observing the center 61a of the lower part with a telescope from side a is used.

When positioning the center 61a in this way, the operating cylinder 74 is operated simultaneously with or after the operation to position the support in the radial direction and fix the position. The position, perpendicularity, and radial angle of the structural pillar to be positioned are determined in advance using positioning jigs 6 and 61.

When the above operations are completed, the support plate 52 of the upper positioning device is erected and the jig 6 supported by it is removed, and the support cylinder 84 of the lower positioning device is also erected and the support plate 52 supported by it is removed. The jig 61 that had been installed is removed, and the actual erection work of the structural pillar P begins.

The construction of the structural pillar P according to the method of the present invention is carried out in the form shown in FIG. The structural pillar P is suspended in the casing tube C while the side wall of the structural pillar P is guided by each support guide roller 51 of the positioning device U and each guide roller 86 of the lower positioning device which is also fixed in position. However, in many cases, brackets for adding beams are protruded from appropriate places on the sides of this structural pillar P, so in the present invention,
First, a support plate 52 having respective support guide rollers 51 and 86;
The support cylinder 84 is erected to secure a wide space on the inner surface side of the support guide member, and in this state, the structure pillar P is suspended and inserted between the rollers 51° 86, and then the lower end of the pillar P is inserted. The supporting plate 52 and the cylinders 51, 84, which had been erected near the concrete shaft, are laid down, and the rollers 51, 86 support the column P while restraining it. They were suspended and erected while being guided by 86.

In Fig. 5, 10C is a concrete pile built underground, 10A is a crane, 10P is a lifting jig called Yatco that connects the structural pillar P to the lower end, and 10B is the upper part. This is a mounting stand for the positioning device.

As described above, the present invention maintains the correct position and orientation of the structural pillar in the upper and lower portions of the pillar in advance when erecting the structural pillar. A positioning jig having a cross-sectional outline of the structural column is used by a positioning device equipped with supporting and guiding means to preset the erection position and direction of the column, and then the column is guided by the positioning device. Compared to conventional construction methods, not only is it possible to achieve higher positioning accuracy especially for the structural pillars with protruding beam mounting brackets, but the construction work itself can be significantly streamlined. There is.

Incidentally, in the above embodiment, it is also possible to determine the erection position of the structural pillar without using the lower positioning device.

In this case, for example, a verticality detection means (not shown) such as a pendulum is incorporated into the hanging jig 10P for the structural pillar P shown in FIG. After determining it in advance, the verticality may be adjusted while suspending the structural pillar P into the casing tube.

Although not shown in the drawings, the method of the present invention can of course be implemented by other mechanisms configured to have the same function as the apparatus of the above embodiment.

[Brief explanation of drawings]

Fig. 1 is a plan view of the upper positioning device, Fig. 2 is a front view with a part of Fig. 1 in section, Fig. 3 is a front sectional view of the lower positioning device, Fig. 4 is the same plan view, and Fig. 5 The figure is a side cross-sectional view showing the condition of hardening according to the method of the present invention. 1...Base frame, 2...Y-axis trolley, 3...
... Y-axis cart, 4 ... Rotating table, 5 ...
・・Support guide member of upper positioning device, 6・・・・・
Upper positioning jig, 71...Base ring, 81...
...Rotating ring, 82...Bracket, 83...
...Operating cylinder, 84...Support cylinder, 86...Guide roller, 61...Lower positioning jig, C...Casing tube, P...
...The pillar of structure.

Claims (1)

[Claims] 1. In the structure pillar reverse driving method, the above-mentioned 2.
An upper positioning device is disposed on the inner peripheral side of an annular rotary plate formed to be rotatable and fixed on a surface including the shaft, and has an upper positioning device having a support guide member that can be raised and lowered, and corresponds to the lower part of the structural column. A rotating portion formed on the inner circumferential wall of the casing tube so as to be rotatably fixed along the inner circumference of the tube and movable forward and backward along the two axial directions from the inner circumferential wall side of the casing tube toward the center. A lower positioning device having a support guide member provided in a freely undulating manner is provided on the inner surface of the support body, and before erecting the structural pillar, the cross-sectional outline of the structural pillar in which the upper positioning device is to be installed is determined. The positioning jig having the above-mentioned positioning jig is operated to predetermine the position in the two axial directions and the radial angle of the jig using the pivot center of the upper positioning device, and subsequently, the pivot center and the support guide member of the lower positioning device are operated. After predetermining the perpendicularity of the structural pillar to be erected based on the center relative to the jig, which is positioned by the upper positioning device and the lower Loosely insert the inner side of each support guide member in the positioning device, stop the loosely insert just before the lower end of the structural pillar abuts the cast concrete IJ-1, and collapse the support guide member. A preset positioning type erection method for structural pillars in the structural pillar reverse driving method, which is characterized in that the structural pillars are erected while being guided by the structural pillars.