JPH0724495Y2 - Reinforcing bar connection structure - Google Patents

Description

[Detailed Description of the Invention] << Industrial Application Field >> The present invention relates to a connecting structure of end portions of reinforcing bars forming a reinforcing bar cage, and particularly to a connecting structure designed to improve workability at the time of connecting.

<Background of the Invention> For example, since a pier for an expressway requires a large-diameter and deep-foundation foundation, the reinforcing bar cages embedded in the foundation are inevitably increasing in diameter and length.

Reinforcing bar cages are obtained by dividing the reinforcing bars into longitudinal bars and horizontal bars and braiding them in a cage shape, but the diameter of each reinforcing bar will inevitably become quite large with the increase in diameter and length. Moreover, since the length of the vertical bar is limited, it is necessary to appropriately add the vertical bar in the depth direction of the rebar cage according to the increase in the depth.

When replenishing vertical bars, the ends of the reinforcing bars to be joined have been overlapped and welded, or another connecting reinforcing bar is provided so as to straddle the ends, and both sides of the connecting reinforcing bar are connected. And the ends of the vertical lines were connected by welding.

<Problems to be solved by the invention> However, when such a connecting structure is applied to a large-diameter reinforcing bar, there is a problem that welding takes a long time and construction efficiency is low.

Further, unless a skilled welding operator is used, the reliability of the strength of the joint is poor, and moreover, the mounting accuracy between the rebar cages becomes questionable.

The present invention has been made in view of such conventional problems, and the purpose thereof is to connect large-diameter reinforcing bars of this kind in a short time and quickly, and it is easy even for a skilled person. It is to provide a connecting structure of reinforcing bars that can be installed with high accuracy.

<< Means for Solving the Problems >> In order to achieve the above-mentioned object, the present invention is a structure for connecting longitudinally opposed ends of a reinforcing bar constituting a reinforcing bar cage, wherein the connecting structure is a coupling. It is a structure in which each of the reinforcing bars to be connected is connected via the angle steel welded to the opposite ends, and one of the two plates constituting each angle steel is connected to the long side direction of the plate. Is welded to each rebar so as to be in the longitudinal direction of the rebar, the plurality of holes are formed in the other plate of each angle steel, and the plurality of holes are used to bolt opposite ends of the rebar. It is characterized by a nut connection.

<Operation> By joining the angle steel provided at each end of the rebar, and by joining the joint surfaces with bolts and nuts, the joining of the ends of the rebar is completed, so that it can be done in a short time and without depending on the skilled person. Both can be constructed efficiently.

Further, the reinforcing bar can be assembled with high accuracy according to the mounting position accuracy of the angle steel.

<< Embodiment >> An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an explanatory sectional view showing a process of constructing a reinforcing bar cage to which the present invention is applied, FIG. 2 is a side view of a main part showing a connecting structure of the reinforcing bar cage, and FIG. 3 is III-III in FIG. It is a line sectional view.

In Fig. 1, excavation holes formed by excavation in the ground 10
The preceding rebar cage 14 has already been built in 12 and the rebar cage
Reference numeral 14 is suspended and fixed to the excavation hole 12 by a temporary support.

Further, on the preceding rebar cage 14, the trailing rebar cage 20 suspended by the crane 16 via the hanging metal fitting 18 is positioned to face each other, and in this state, the vertical bars 14a and 20a of the rebar cages 14 and 20 are Positioning is performed so as to be substantially on the same axis, and in that state, the connecting work with the vertical reinforcing bar 20a of the trailing reinforcing bar cage 20 is performed.

In addition, when the depth of the foundation constructed in the excavation hole 12 is about 100 m, the diameter of the rebar of each rebar cage 14 and 20 is about 35 m.
Large diameter rebar with m or more.

The upper end of the longitudinal bar 14a of the preceding rebar cage 14 and the trailing rebar cage 2
At the lower end of the vertical bar 20a of 0, as shown in FIG.
24 and 26 are integrated by welding in advance, and their joint flange surfaces 24a and 26a are directed to the longitudinal side surfaces.

Angle steel fixed to the longitudinal bars 14a, 20a of the leading and trailing rebar cages 14, 20
The respective flange surfaces 24a, 26a of 24, 26 are in contact with each other, and the joint flange surfaces 24a, 26a are joined to each other by penetrating the joint surfaces and connecting them with bolts B and nuts N. The two vertical lines 14a and 20a are firmly connected to each other.

Assembling accuracy in this combined state, if the angle steel 24, 26 provided on each of the vertical bars 14, a, 20a is kept constant at the horizontal level, distortion or bending will not occur with the corresponding accuracy. The vertical stripes 14a and 20a can be joined together.

<Effect of Device> As described in each of the above embodiments, according to the connecting structure of the reinforcing bar according to the present invention, the reinforcing bar cage is mechanically connected by the bolt and the nut, as compared with the conventional connecting structure by welding. Therefore, the time required to add rebar is shortened,
Construction efficiency is greatly improved.

In addition, the assembly accuracy at the connection position can be accurately connected according to the mounting position accuracy of the angle steel that has been welded to each rebar in advance, so the resulting rebar cage does not have distortion, warpage, or bending, Can be assembled with high precision.

[Brief description of drawings]

FIG. 1 is an overall view showing a joining structure of reinforcing bar cages to which the present invention is applied, FIG. 2 is a partial view showing details of a connecting portion of vertical bars, and FIG. 3 is a sectional view taken along line III-III of FIG. Is. 14 …… Leading rebar cage, 14a …… Longitudinal line 20 …… Rearward rebar basket, 20a …… Longitudinal line 24 …… One chevron steel, 26 …… Other chevron steel 24a, 26a …… Joint flange surface B… … Bolts, N… nuts

Claims (1)

[Scope of utility model registration request] 1. A structure for connecting longitudinally opposed ends of a rebar constituting a rebar cage, wherein the connecting structure is welded to the opposed ends of the rebars to be joined. It has a structure in which the angle steel is connected, and one of the two plates forming each angle steel is welded to each rebar so that the long side direction of the plate is the longitudinal direction of the rebar. A connecting structure for reinforcing bars, characterized in that the plurality of holes are formed in the other plate of each chevron, and the opposing ends of the reinforcing bars are bolt-nut coupled by the plurality of holes.