JPS6231560Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of a floor shoring beam used in a construction method in which the walls are made of precast concrete slabs and the floor is made of cast-in-place concrete.

Conventional floor shoring beams of this type consider only vertical loads and do not take horizontal forces into account.
Therefore, in order to prevent the precast concrete wall plate a from falling in an out-of-plane direction, as shown in FIG. 1, a diagonal support b is attached to the wall surface to hold the wall plate a.

This method had the disadvantage that the working space under the floor shoring beam c became narrow, required a large number of temporary materials, and reduced work efficiency.

This project was proposed in order to eliminate such drawbacks, and both ends of the upper chord are provided with mounting brackets for the opposing precast concrete wall plates, and both ends of the lower chord are provided with mounting brackets for the opposing precast concrete wall plates. A floor shoring beam that also serves as a precast concrete wall plate retainer, characterized in that a strut member for the opposing surface of the wall plate is attached so that the protrusion length from the end of the lower chord can be adjusted. This is related.

The present invention will be described below with reference to illustrated embodiments.

1 is the upper chord of the floor support beam of this proposal, which has a length corresponding to the distance between the opposing precast concrete wall panels a, a, and has a pair of precast concrete wall panels a, a at both ends.
A fitting 2 is attached to the top of the plate.

Reference numeral 3 denotes a lower chord member joined to the upper chord member 1 via a diagonal member 4, and screw-type jacks 5 are attached to both ends of the lower chord member 3, which constitute a tensioning member for the opposing surfaces of both wall plates a. The protrusion length from the end of the lower chord member 3 is adjusted.

The floor shoring beam constructed as described above is arranged between the two opposing wall plates a, and each of the wall plates a is
The joining fittings 2 at both ends of the upper chord member 1 are fixed to the top, and then each of the screw-type jacks 5 is rotated to adjust the protruding length of the tip pressurizing piece 5a from the end of the lower chord member 3. The opposite surface of the plate a is stretched by a lower chord member 3 via a screw type jack 5. Next, a floor formwork 6 having the required rigidity is mounted on the upper chord member 1, reinforcement is arranged thereon, and floor concrete 7 is cast.

When floor concrete is placed in this way, when horizontal force P is applied due to dynamic loads during concrete placement, the forces are balanced as shown in the model in Figure 4, and the floor shoring beams are This functions to prevent the wall plate a from falling out of plane, and there is no need to use a diagonal support for holding the wall plate.

As mentioned above, the floor shoring beam according to this proposal is equipped with mounting brackets for the opposing precast concrete wall plates at both ends of the upper chord, and at both ends of the lower chord, braces are attached to the opposing surfaces of both wall plates. Since the strut member is attached so that the length of its protrusion from the end of the lower chord can be adjusted, the mounting bracket can be fixed to the opposing wall plate, and the length of the strut member that protrudes from the end of the lower chord can be adjusted. The floor support beam of this proposal prevents the wall boards from falling out of plane by adjusting the opposing surfaces of the opposing wall boards using the same member. As a result, there is no need to use diagonal supports to hold the wall boards, the work space under the floor form can be expanded, work efficiency is improved, and the amount of materials carried in and out is reduced.

[Brief explanation of the drawing]

Figure 1 is a front view showing how a conventional floor shoring beam is used, and Figure 2 shows how an example of the floor shoring beam used also serves as a precast concrete wall plate support according to the present proposal. A front view, FIG. 3 is a partially enlarged view, and FIG. 4 is a model diagram showing the balance of forces when a horizontal force is applied. 1... Upper chord material, 2... Joining metal fittings, 3... Lower chord material, 5... Screw type jack.

Claims (1)

[Scope of utility model registration request] At both ends of the top chord, mounting brackets are attached to the opposing precast concrete wall plates.
A precast concrete wall board holder, characterized in that, at both ends of the bottom chord, tensioning members for the opposing surfaces of the two wall slabs are attached so that the length of the projection from the end of the bottom chord can be freely adjusted. A floor shoring beam that also serves as a floor support beam.