JPS63130841A - Truss beam execution method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method of constructing a truss beam that introduces prestress force for use in structural members such as roofs, slabs, and beams of buildings.

"Prior Art" Previously, the present applicant has developed P, S, S, T (prestressed, steel, truss) which made it possible to realize long span truss beams by introducing prestress force into the truss beams.
provided the construction method.

As an example of the conventional construction method for truss beams used in the P, S, S, and T construction methods, as shown in Figure 8, truss beams are erected by a combination of box sets and flat sets. something is known.

In FIG. 8, reference numeral 1 indicates a truss beam assembled at a predetermined location of the structure. To assemble this truss beam I, first, a box-shaped member 1a is divided into a plurality of predetermined shapes and assembled on the ground at a portion corresponding to approximately the center of the truss beam I.

I b, 1 c, and I d are hoisted to a predetermined location, and their ends are attached to supporting members 2.2. After assembling and integrating with support by ..., both ends 1 e, l f of the truss beam I, which is the supporting part, are assembled by flat assembly, and then supported by the pillars 3.3 and forming the truss beam. A PCw4 material is disposed on at least one of the upper chord member and the lower chord member, thereby introducing a prestress force into the truss beam l.

However, in the conventional truss beam construction method, a prestress force is applied to the entire truss beam after the truss beam is completely assembled. Prestress force is introduced after the truss beam is installed in a designated location in the structure, and construction methods such as lift-up cannot be used. Therefore, it is difficult to assemble truss beams in the air or to introduce prestress force. Temporary scaffolding, pedestals, etc. are required when carrying out this work, which increases construction costs and reduces construction efficiency, and poses problems such as a high risk of safety.

The present invention has been made in view of the above problems, and
The purpose is to provide a truss beam construction method that can reduce construction costs, improve construction efficiency, and reduce safety risks by constructing truss beams using a list construction method. .

``Means for Solving the Problems'' In order to solve the above-mentioned problems, the present invention provides a method for assembling the truss beam at the center of the truss beam, excluding both ends, which are supporting parts, on the ground. A prestressing force is introduced into the truss beam, and then the truss beam is lifted up to a predetermined location on the structure to be constructed, and both ends are attached to its support portion, and then the truss beam is installed at a predetermined location on the structure. Alternatively, the approximately central part of the truss beam, excluding the supporting parts at both ends, is assembled flat on the ground, and a prestress force is introduced into the truss beam in the central part, and then the supporting part is assembled flatly on the ground. After attaching both ends to the structure, the truss beam is lifted to a predetermined location of the structure to be constructed, and then the truss beam is installed at a predetermined location of the structure.

``Example'' The present invention will be described in detail below with reference to FIGS. 1 to 7. 1 to 6 show a first embodiment of the present invention, and are diagrams for explaining a truss beam construction method. In these figures, the same elements as those shown in the prior art are denoted by the same reference numerals, and the explanation thereof will be omitted.

(i) First, as shown in Figure 1, the truss beam IA in the approximately central part excluding both ends, which are the supporting parts of the truss beam, is fixed on the ground by the upper chord member 5, the lower chord member 6, and the lattice member 7. Assemble into the shape of.

(ii) Next, as shown in Figure 2, the truss beam l
A PCM material (not shown) is arranged along at least one of the upper chord members 5 and lower chord members 6 of A, and a prestress force is introduced.

(iii) Next, as shown in FIG. 3, the truss beam IA to which prestress force has been introduced is lifted up to a predetermined location of the structure to be constructed.

(iv) Next, as shown in FIG.
Complete the truss beam l by attaching f.

(V) Finally, as shown in FIG. 5, both ends 1e.

1f to the pillar 3.3, the truss beam 1
is installed at a designated location on the structure.

Note that, as shown in FIG. 6, the truss beam 1 may be assembled at a predetermined location and then slid to the desired installation position and fixed to the pillar 3.3, depending on the purpose. Furthermore, it may be used as a permanently movable roof without being fixed to the pillars 3.3.

Next, a second embodiment will be described using FIG. 7.

(+) Both ends 1 e, l which are the supporting parts of the truss beam 1
The truss beam IA at approximately the center except for r is assembled on the ground by flat assembly using upper chord members 5, lower chord members 6, lattice members 7, etc.

(11) Introduce prestress force to the truss beam IA at the center.

(iii) Next, both ends 1e which are supporting parts
, 1 f, this truss beam l is lifted up to a predetermined location of the structure to be constructed.

(1v) Next, the truss beam l is installed at a predetermined location of the trench structure.

In addition, in this embodiment, as shown in FIG. 6, as in the first embodiment, after assembling at a predetermined location according to the purpose, the pillar 3.3 is slid to the desired installation position.
Alternatively, it may be used as a permanently movable roof without being fixed to the pillars 3.3.

Therefore, in the truss beam construction method of the present invention, prestress force is introduced only to the center portion of the truss beam, and not to both ends of the truss beam.
When truss beams are assembled on the ground, pre-stress force can be applied and then installed at a predetermined location on the structure using a lift-up method, etc., making it possible to assemble truss beams in the air and reduce pre-stress force. There is no need to carry out work to introduce temporary construction, and there is no need for temporary scaffolding or pedestals used at that time, reducing construction costs and improving construction efficiency, as well as reducing the risk of safety. be able to.

"Effects of the Invention" As explained above, in the truss beam construction method of the present invention, the approximately central part of the truss beam excluding the supporting parts of the truss beam is assembled on the ground, and the truss beam in the central part is prestressed. A force is introduced, and then this truss beam is lifted up to a predetermined location of the structure to be constructed, and after both ends, which are supporting parts, are attached, the truss beam is installed at a predetermined location of the structure. Or,
Further, after attaching both ends, which are supporting parts, to the central truss beam into which the prestress force is introduced, the truss beam is lifted up to a predetermined location of the structure to be constructed,
Then, since the truss beam is installed at a predetermined location of the structure, it is possible to assemble the truss beam on the ground, and also to introduce prestress in the central part, and as a result, the truss beam can be constructed using the lift-up method, eliminating the need for temporary scaffolding or gantry, which has the effect of reducing construction costs, improving construction efficiency, and reducing the risk of safety. .

[Brief explanation of the drawing]

Figures 1 to 6 show a first embodiment of the present invention, in which Figure 1 is a front view of the truss beam in the center, and Figure 2 is a state in which prestress force is introduced to the truss beam in the center. front view, 3rd
The figure is a front view showing the truss beam shown in Figure 2 being installed in a predetermined location of a structure using the lift-up method;
Figure 4 is a front view of the entire truss beam showing both ends, which are supporting parts, attached to the central truss beam. Figure 5 is a front view of the truss beam shown in Figure 4 fixed to the column. Figure 6 is a perspective view when truss beams are used for the roof, and Figure 7 is a perspective view of the 2nd beam.
Fig. 8 shows a front view of a truss beam constructed by the construction method of the present invention, and Fig. 8 shows a conventional technique;
It is a front view of the truss beam in the state where it was constructed by combining the X group and the flat group. 1...Truss beam, IA...Central part of truss beam, 4 e, If...Both ends of truss beam.

Claims (2)

[Claims] (1) A truss beam used as a structural member such as a roof, slab, beam, etc. of a structure, where the approximately central part of the truss beam excluding both ends, which are the supporting parts, is assembled on the ground, and the truss of this central part is assembled on the ground. A prestress force is applied to the beam, and then this truss beam is lifted up to a predetermined location on the structure to be constructed, and after both ends, which are supporting parts, are attached, the truss beam is placed in a predetermined location on the structure. A truss beam construction method characterized by the installation of truss beams. (2) Truss beams used as structural members such as roofs, slabs, beams, etc. of structures, where the approximately central part of the truss beam excluding both ends, which are the supporting parts, is assembled on the ground by flat assembly, and the center After introducing a prestress force into the truss beam of the section, and then attaching the supporting parts at both ends, this truss beam is lifted up to a predetermined location of the structure to be constructed, and then the said truss beam is attached to the structure. A truss beam construction method characterized by installing it at a predetermined location.