JPH0139284Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention relates to a joint for threaded reinforcing bars installed in a steel pressure vessel.

(Prior Art) As shown in FIG. 1, when installing a steel pressure vessel 1 and a reinforced concrete structure 2 inside the vessel on a foundation concrete 4, it is necessary to completely maintain airtightness inside the vessel and It is necessary to reliably transmit the tensile force applied to the reinforced concrete structure 2 inside the container to the foundation concrete 4 at the bottom of the container. Therefore, in the past, installation work was carried out using the following method.

As shown in FIG. 2, steel beams 6 (T-shaped cross section in the figure) are welded to both sides of the floor plate portion 1a of the steel pressure vessel 1 so as to surround the outer periphery of the reinforced concrete structure 2. After attaching threaded structural reinforcing bars 3 and anchor reinforcing bars 5 to the concrete with bolts, concrete is poured.

As shown in FIG. 3, female threaded steel couplers 7 are welded at predetermined intervals at the positions described in , and threaded reinforcing bars 3,
5 and pour concrete.

However, in the method (2), the load stress acting on the reinforcing bars 3 and 5 is transmitted to the foundation concrete 4 via the steel beam 6, which complicates the transmission of force and complicates structural calculations.

If another method is used, the above problem is solved, but the coupler 7 on the structure side and the coupler 7 on the anchor side must be installed on the same center line so that eccentric stress does not occur, and the permissible Since the range of error becomes smaller, the cost becomes considerably high considering the time and expense required to ensure construction accuracy.

Therefore, in many cases, both are used in combination;
If steel materials such as the thick steel beam 6 and the steel coupler 7 are welded to both sides of the container, the material of the container floor plate portion 1a may change.

(Purpose of the invention) This invention was devised to improve the conventional method as described above, and it is capable of reliably transmitting the load stress acting on the reinforcing bars to the foundation concrete, and is easy to design and construct. The purpose of the present invention is to provide a threaded reinforcing bar joint that can shorten the construction period and reduce costs.

(Structure of the invention) The threaded reinforcing bar joint according to this invention uses a knotted coupler made of a hollow circular tube with a knotted partition in the center and a female thread machined inside.
It is characterized in that it is fitted into a hole drilled in the floor plate of a steel pressure vessel and fixed by welding at a position where the floor plate and the partition are on the same level. At least one
Form a pair of parallel surfaces.

(Example) This invention will be described below based on an example shown in the drawings.

FIG. 4 shows a threaded reinforcing bar joint according to this invention, and 8 is a knotted coupler made of a hollow circular pipe made of steel.

A bamboo knot-shaped partition 9 is provided in the center of the knotted coupler 8, and when it is attached to the steel pressure vessel 1a by welding, the interior of the vessel is completely airtight. In addition, the interior is internally threaded, and as shown in the figure, threaded reinforcing bars 3 for structures and anchors are connected from both ends of the knotted coupler 8.
5 is screwed in, and lock nut 1 is screwed in if necessary.
1 is installed.

Connect the knotted coupler 8 to the floor plate 1 of the steel pressure vessel 1.
To install it on the floor plate 1a, fit the knotted coupler 8 into a hole drilled in advance at a predetermined position in the floor plate part 1a, and make sure that the floor plate part 1a and the axis center line are perpendicular to each other at a position where the floor plate part 1a and the partition 9 are on the same level. After adjusting it so that it is, fix it by butt welding or fillet welding.

By the way, as shown in FIG. 5, this knotted coupler 8 has at least one pair of parallel surfaces 10 formed on the side surfaces of both ends in the longitudinal direction. If held down with a tool, the tightening torque of the threaded reinforcing bars 3, 5 and the lock nut 11 will not be applied to the welded portion with the floor plate portion 1a.

FIG. 6 shows another embodiment of the knotted coupler 8, in which only the central portion of the outer periphery is circular, and the other portions are hexagonal.

(Effects of the invention) This invention has the above configuration, and according to this invention, the load stress acting on the reinforcing bars can be reliably transmitted to the foundation concrete, and the design can be simplified. In addition, since the knotted coupler has an integrated top and bottom structure, there is no need to align the top and bottom as in conventional methods, and the welding with the coupler can be performed reliably regardless of the thickness of the container floor plate, reducing the construction time. It is possible to achieve shortening of time and reduction of construction costs. In addition, filling performance between the lower end of the container floor plate and the base mortar can be improved.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing a steel pressure vessel with a reinforced concrete structure installed on a concrete foundation, and Figures 2 and 3 show a conventional threaded reinforcing bar joint attached to the floor plate of the vessel. FIG. 4 is a sectional view showing an embodiment of a threaded reinforcing bar joint according to this invention, and FIGS. 5 and 6 are perspective views showing embodiments of a knotted coupler used in this invention. 1... Steel pressure vessel, 1a... Floor plate part, 2...
Reinforced concrete structure, 3...Reinforcing bars for structures,
4... Foundation concrete, 5... Rebar for anchor, 6... Steel beam, 7... Steel coupler, 8
...knotted coupler, 9...partition, 10...parallel surface, 11...lock nut.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A knotted coupler made of a hollow circular tube with a knotted partition in the center and a female thread machined inside is attached to the floor plate of a steel pressure vessel. 1. A threaded reinforcing bar joint that is fitted into a drilled hole and fixed by welding at a position where the floor plate portion and the partition are on the same level. (2) The threaded reinforcing bar joint according to claim 1, wherein at least one pair of parallel surfaces is formed on the longitudinal end side surface of the knotted coupler.