JP2984700B2 - Control method of installation distance in lift-up method of beam string - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for managing an installation distance in a lift-up method of a beam string.

[Prior Art] The present inventors set up a string beam in advance on a temporary gantry or a support such as a column, lift it up, attach both ends of the beam to a support structure such as a column or a load-bearing wall, and erection. We first developed a lift-up method for string beams.

By the way, in this lift-up method, when assembling the string string, it is assembled while supporting it by the support, and when lifting up, both ends of the string string are lifted by a tensile material such as a wire, so the string string is weighed by its own weight. Its length extends and changes in the horizontal direction.

Therefore, it is an essential condition that the length of the changed beam string is within an allowable range of a distance between predetermined mounting positions by the support structure, and if it is longer than this, connection and erection is impossible.

[Problems to be Solved by the Invention] The present invention relates to a mounting length in a lift-up method of a string string beam, in which the length of the string beam can be lengthened by its own weight before the lift-up after the ground structure and the mounting distance can be managed safely and easily. The purpose of the present invention is to provide a management method.

[Means for Solving the Problems] In the method of managing the installation distance in the lift-up method of the string beams according to the present invention, the string beams are laid on a support such as a temporary gantry or a column and lifted, and both ends thereof are lifted up. In the lift-up method of the beam string to be installed and erected on a support structure such as a column or a load-bearing wall, before the lift-up after the completion of the laying, release the support of the beam string by the support and shift to the support by the support device. At least one end of both ends of the supported string beam is allowed to slide outward, and the end of the string string is slid by its own weight so that the length of the string string is extended; The length of the beam string is confirmed to be within an allowable range of a distance between predetermined attachment positions by the support structure, and the length is adjusted.

Further, in the above system, the setting position is marked in advance on the string member of the string string, and when the string string is laid, the string member is set on the large beam member or the project member while pulling the end of the string member. It is assumed that.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a building support structure 1 such as a pillar or a load-bearing wall is constructed in advance, and a receiving truss 2 is mounted thereon.

The receiving truss 2 is mainly composed of two inclined members 2a and a top beam member 2b for receiving a roof. The lower ends of the two inclined members 2a are fixed to the upper end of the support structure 1 by pin joining, and both ends of the top beam 2b are also joined to the upper end of each inclined member 2a by pin joining. Being pivoted.

Next, the string beams 3 are assembled on the ground between the support structures 1. The string beam 3 mainly includes an arch-shaped large beam member 3a, a string member 3b such as a strand rope, and a rod-shaped projecting member 3c. The large beam 3a is connected and fixed to the inner end of the top beam 2b of the receiving truss 2 so as to constitute an arched roof as a whole. The string members 3b are connected to both ends of the arch-shaped large beam 3a so as to stretch the large beam 3a in an arc shape. Further, the projecting member 3c is interposed between the large beam member 3a and the string member 3b to transmit the load of the large beam member 3a to the string member 3b and apply a prestress to the string member 3b.

Reference numeral 4 denotes a shoring for assembling a temporary gantry, a column, or the like. The work of laying the string beam 3 is performed on the shoring 4.

As is clear from FIG. 2, both ends of the string member 3b are attached to the mounting sleeves 3 provided below both ends of the girder member 3a.
a 'and inserted and fastened by the fastening nut 3b'. In the middle of the string member 3b, an appropriate clamp (not shown) attached to the lower end of the string member 3c is fixed.

The stringing material 3b is marked in advance with the fastening and fixing positions (mounting lengths) at both ends, and the clamp position by the projecting material 3c is also marked. Is connected to the vicinity of the end of the string member 3b, and the wire 5 is pulled by an appropriate pulling means (not shown) such as a truck crane. Adjust and fix so that it matches the clamp position at the lower end.

In addition, the roof foundation material (not shown) is used when the string 3 is laid.
It is good to attach also. The work of laying the string beams 3 may be performed in parallel with the work of constructing the support structure 1 and the receiving truss 2.

When the construction of the beam string 3 is completed, the jack 4a at the upper part of the support 4 is jacked down to cut off the large beam 3a.

When the support of the beam string 3 by the support 4 is released, the second
As shown in the figure, one end of the girder 3a is supported by the supporting device 7 via the temporary auxiliary end member 6, and the end of the girder 3a, that is, the auxiliary end member 6 is turned outward. It is locked by a non-slip member 7a so as not to slip.

On the other hand, the other end of the beam 3a is supported by a supporting device 9 via a temporary auxiliary end member 8, and a sliding material 9a such as a Teflon sheet is stretched on the upper surface of the supporting device 9. Thus, the auxiliary end member 8 can slide outward.

As described above, when both ends of the girder 3a shift to the support by the supporting devices 7 and 9, the auxiliary end member 8 at the sliding side end of the arched girder 3a is slid by its own weight. It slides on 9a as shown by arrow A and extends like an imaginary line.

At this time, a load such as the girder 3a or the roof base material is applied to the string 3b via the strut 3c, and a prestress is given to the string 3b.

Next, the length of the string beam 3 that has been extended by its own weight as described above is
The amount of elongation is checked to see if the distance between the predetermined mounting positions by the support structures 1 on both sides is within an allowable range.

In the present embodiment, the girder 3a is supported so as to extend only in one direction, but the present invention is not limited to this. Both auxiliary end members are supported so that both ends of the girder 3a extend. 6, 8 may be slipped outward.

Next, as shown in FIG. 3, a lower end of a tension member 10 such as a hanging wire or a rod is attached to both ends of the string member 3 and a lifting jack 11 attached to the inner end of the receiving truss 2. The beam string 3 is lifted up and fixed to the receiving truss 2 as shown by a virtual line.

At the time of lifting up the beam 3, a bush stay 13 is stretched between the outer end of the receiving truss 2 and the base 12 so as to control the displacement of the receiving truss 2 at the time of lifting up to achieve balance. It has become.

[Effects of the Invention] (1) Before lifting up after completion of the above-mentioned laying, the support of the beam string by support is released to shift to the support by the support device, and at least one of both ends of the supported beam string is supported. The end of the string string can be slid outward by its own weight so that the length of the string string can be extended by its own weight, and the length of the string string that has been extended by its own weight can be determined by the support structure. The installation distance of the beam string was confirmed to be within the allowable range of the installation position and the length was adjusted, so the management of the installation distance of the beam string was performed in a very stable state where the beam string was supported by the support device. And accurate measurement of the length can be performed safely and quickly.

(2) The setting position is marked in advance on the string member of the string string, and the string member is set on the large beam member or the projecting member while pulling the end of the string member at the time of assembling the string member. The beam string can be laid in a state close to the shape.

[Brief description of the drawings]

FIG. 1 is a construction explanatory view showing a grounded state of a string beam, FIG. 2 is an enlarged view showing a support state of both ends of the string string, and FIG. 3 is a construction explanatory view of a lift-up state. 1 ... support structure, 2 ... receiving truss, 2a ... inclined material,
2b: Top beam, 3 ... Beam string, 3a: Large beam, 3a '...
Mounting sleeve, 3b ... Cable, 3b '... Tightening nut, 3c
... Strut, 4... Shoring, 4a... Jack 5... Wire 6... Auxiliary end member 7... …… Support device, 9a…
... Sliding material, 10 ... Tensioning material, 11 ... Hanging jack, 12 ...
... Base, 13 ... Backstay.

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshimi Ogino 3-4-267 Takamori, Izumi-ku, Sendai, Miyagi (72) Inventor Seiji Kawabe 7-32, Inaricho, Morioka-shi, Iwate (56) References 1-219203 (JP, A) JP-B-58-56778 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04B 1/34 E04B 1/32 101-102 E04B 1/342 E04G 21/14

Claims (2)

(57) [Claims] In a lift-up method of a beam stringer, a beam is erected on a support such as a temporary gantry or a column and lifted up, and both ends of the beam are attached to a support structure such as a column or a load-bearing wall. Before the lift-up after the completion of the framing, the support of the stringer by the support is released to shift to the support by the support device, and at least one end of both ends of the supported stringer slides outward. So that the end of the string string can be slid by its own weight so that the length of the string string can be extended, and the length of the string string that has been extended by its own weight can be reduced by the distance between predetermined mounting positions by the support structure. A method for managing a mounting distance in a lift-up method of a beam string, comprising confirming that the length is within an allowable range and adjusting the length. 2. The method according to claim 1, wherein a setting position is marked in advance on the string member of the string string, and when the string string is laid, an end of the string string is set on the large string member or the strut member while handing over the end of the string member. The method for managing a mounting distance in a lift-up method for a beam string according to claim 1.