JPH026097Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention applies to conventional steel used when creating wave-dissipating concrete blocks, wave-dissipating caissons, or retaining walls, breakwaters, embankments, seawalls, dams, and other civil engineering structures. This relates to concrete frames that can be used as an alternative to wooden or board shapes.

[Prior Art] Conventionally, steel formwork has been mainly used to create the above-mentioned structures, but this requires both assembly and removal of the formwork. Furthermore, it takes time and effort to pick up the product after it has been removed, which increases costs.

Furthermore, since the formwork cannot be removed until the main concrete has hardened, it has the disadvantage that on-site work takes a long time.

[Problems to be solved by the invention] Therefore, the present invention eliminates the trouble and time of removing the formwork, and also eliminates the need for assembling reinforcing bars for structural members on site, thereby saving the labor and time required for this work. The aim is to provide a concrete dumping frame that can significantly shorten the overall construction period.

Furthermore, the structure is such that prestressed waste frames or reinforced concrete and cast-in-place concrete are strongly joined together.

[Means for solving the problem] The present invention incorporates the total amount of reinforcing bars necessary for the structure to be constructed in advance and uses precast (PC) in the formwork shape.
When concrete members are created and structural members are constructed, this PC member is used as a formwork, and then it is integrated with cast-in-place concrete structural members to become part of the structure, and is called a waste frame. It is something.

Further, in order to strengthen the connection between the frame and the main body, distribution bars are protruded in a truss shape from the joint surface.

[Example] A description will be given according to an embodiment shown in the drawings.

In Figure 1, main reinforcing bars 2 are placed at appropriate intervals inside the prestressed or reinforced thin concrete 1.
are buried, distribution reinforcements 3 are buried together to communicate between the main reinforcements 2 to form a precast (PC) concrete member, and the cast-in-place concrete of this PC member, that is, the structural member side One or more truss-type reinforcing bars 4 are partially exposed on the joint surface of the reinforcing bars 4 in parallel with the main reinforcing bars 2 buried inside.

Then, if necessary, exposed main reinforcing bars 5 are arranged so as to connect the tops of the truss reinforcing bars 4.

Figure 2 shows an example of the construction of a floor slab, in which the waste frames 1a, 1b, and 1c of the present invention are arranged in parallel. I have let you.

A joint cap 6 is provided at the joint between each of the waste frames, end weir plates 7, 7 are arranged at both ends, and distribution bars are connected to each other to prevent the truss reinforcing bars 4 from collapsing as necessary. 8 as well as additional upper main reinforcements 9 for increasing strength. Cast-in-place concrete 10 is placed within the frame thus formed.
(the shaded area) is poured to join and integrate the cast-in-place concrete and the waste frames 1a to 1c.

[Effects of the invention] As described above, the concrete waste frame of the invention does not need to be removed as a formwork after construction, and therefore costs can be reduced and the construction period can be shortened.

Since the reinforcing bars are exposed in a truss-like manner on the surface of the waste frame, the connection with cast-in-place concrete is extremely strong. Therefore, there is no need to roughen the concrete on the joint surface or apply adhesive, and there is no need for mechanical means for transmitting shear force, such as embedding a dowel.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the invention, and FIG. 2 is a perspective view of an embodiment of the invention.
A side view showing a state of use. 1...PC member, 2...main reinforcement, 3...distribution reinforcement,
4...Truss reinforcement, 5...Top main reinforcement.

Claims (1)

[Scope of utility model registration request] Concrete in which main reinforcing bars and distribution bars that connect them are embedded at appropriate intervals in a form-shaped concrete member, and at least one truss-shaped reinforcing bar is partially exposed on the surface of this member. Discarded frame.