JPH0325103A - Joint work for pc pillar and pc cap beam - Google Patents

Abstract

PURPOSE:To make members light and reduce construction time, by fixing a beam bracket and inserting a PC pillar disclosing upper steel bars in a PC cap beam provided with conjunction plates to fix it and placing concrete in the cavity of a case frame. CONSTITUTION:A steel annular plate 8 is attached at the outer periphery of the lower part of the upper end of a PC pillar 7 made of concrete pile and a beam bracket 9 is fixed. Next, a required numbers of cavities 2 of case frames are made and a steel plate 5 is fixed at the cylindrical inner peripheral face. A PC cap beam 1 having an insert opening 3 provided with a conjunction plate 6 is fitted to a PC pillar 7 on which reinforced steel bars 10 are disclosed from broken upper concrete. Next the conjunction plate 6 is placed on the beam bracket 9 to fix both and concrete 11 is placed into the cavity 2 to connect the PC beam 1 with the PC pillar 7. In this way, the joint work can be efficiently executed in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for joining PC columns and PC pillows in elevated structures such as railways and roads, particularly a pile bent method. ``Prior art, problems to be solved by invention'' Conventionally, a PC pile driven into the ground was used as a column material that served as a foundation and a hammer foot, and a pillow beam was connected and integrated on the top of this column material. The pile bentoka method is known, in which an elevated bridge is constructed by laying girders and floor slabs on top of the pillow beams.

In the conventional pile bent method, breast-stressed concrete piles were used as pillar materials, and the pillow beams were constructed using cast-in-place concrete. For this reason, the conventional construction method requires a large number of man-hours and a long construction period because it involves howing the formwork and reinforcing bars and pouring concrete. There were problems such as stable quality or not being able to obtain it.

"Means for Solving the Problems" In order to solve the above-mentioned conventional problems, the present invention forms the pillow beam l using precast concrete, provides a boxed cavity 2 in the upper part, and connects the bottom surface of the pillow beam 1 to the pillow beam 1. An insertion opening 3 for inserting a punch is provided in communication with the lower surface, and reinforcing bars 4 are arranged in this box-opening cavity 2 so as to be continuous and integral with the reinforcement inside the PC pillow beam l. A joining plate 6 is fixed to the periphery of the opening at the lower end, and an annular steel plate 8 is attached to the outer periphery below the upper end of the hollow PC column 7, and a steel beam support plate 9 extending horizontally is fixed to the outer periphery. Then, the upper end of the PC column 7 above the annular steel plate 8 is crushed to expose the internal reinforcing reinforcing bar lO, and the annular steel plate part of the PC column 7 is inserted from below the insertion opening of the PC pillow l to reinforce it. A reinforcing bar 10 is installed protruding into the box cavity 2, a joint plate 6 is placed on the beam support plate 9 and welded, and in this state, 1 liter of concrete is placed inside the box cavity 2.
This paper proposes a joining method in which the PC column 7 and the PC pillar support l are joined and integrated by pouring. ``Embodiment'' The embodiment of this invention shown in the drawings will be described below. As shown in FIG. A large opening 3 for inserting a column is provided in communication with the lower surface of the PC pillow beam, and reinforcing bars 4 are arranged in the box-cut cavity 2 in a continuous manner with the reinforcement inside the PC pillow beam l. A steel plate 5 is fixed to the inner circumferential surface of the insertion opening 3, and a joining plate 6 is fixed integrally with the steel plate 5 to the periphery of the lower end of the insertion opening 3. As shown in Fig. 3, the PC pillar 7 is made of a concrete pile, and a ring-shaped steel plate 8 is attached to the outer periphery of the lower part of the upper end. It is fixed. 7JJ when connecting the above PC pillar support l and PC column 7.
n! ! As shown in FIG.
The concrete of the upper end of the C column 7 is chipped to expose the internal reinforcing steel bar 10, and the upper end of the PC column 7 is inserted into the insertion opening 3 from the f side of the PC pillow beam l, and inserted into the beam support plate 9L. The joining plate 6 of the PC pillow beam l is placed on it, and both are fixed by welding, and the pillow beam i is temporarily supported on the PC column 7. In this state, the annular steel plate 8 part of the PC column 7 is fitted into the insertion opening 3, the exposed reinforcing reinforcing bar 10 is projected into the box cavity 2, and the concrete is inserted into the box cavity 2. 11, the PC pillar support 1 and the PC column 7 are joined together.

During this concrete pouring, the hollow part of the PC column 7 is sealed with a suitable sealing plate.

In addition, if the reinforcing iron FT55io alone is insufficient for sewing reinforcing bars, auxiliary reinforcing bars can be welded to the annular steel plate 8 as necessary. ``Effects of the Invention'' As described above, according to this invention, since the pillow beams are made of precast concrete, there is no need to assemble formwork or reinforcing bars on site, reducing the number of construction steps and construction period. The quality of the product is also stabilized, and since a box-cutting cavity is provided, the overall weight is reduced, making transportation and other handling easier. In addition, the joining plate around the lower end opening of the insertion opening of the PC pillow beam is placed and welded onto the steel beam support plate fixed to the outer periphery of the annular steel plate attached to the outer periphery of the lower end of the upper end of the PC column. Therefore, it is possible to easily temporarily support the PC pillars on the PC pillars, and in this state, pour concrete into the box cavity to easily join and integrate the two, allowing for efficient joining in a short time. Construction can be carried out.

[Brief explanation of drawings]

FIG. 1 is a plan view of a PC pillar according to the present invention, FIG. 2 is a longitudinal front view of the same, FIG. 3 is a half-sectional front view of a PC column according to the present invention, and FIG. 4 shows a joined state according to the present invention. Figure 5 is a front view of the viaduct constructed according to the present invention.
Figure 6 is a side view of the same. l...PC pillow beam, 2...box-cutting cavity, 3...Kamiiri opening, 4...reinforcing bar, 5...steel plate, 6...joint plate, 7...PC column,

Claims (1)

[Claims] 1) A horizontally protruding steel beam support plate is fixed to the outer periphery of an annular steel plate attached to the outer periphery below the upper end of a hollow PC column, and the upper end of the PC column above the annular steel plate is crushed. The internal reinforcing bars are exposed, and the annular steel plate part of the PC pillar is inserted from below the insertion opening provided in communication with the bottom and lower surfaces of the box-cut cavity provided at the upper part of the PC pillar. protruding into the box-cut cavity, a steel joint plate fixed to the opening periphery of the insertion opening is placed and welded onto the beam receiving plate, and concrete is poured into the box-cut cavity. A method for joining PC columns and PC pillow beams.