JP3556028B2 - Steel tube beam equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a portal-type steel pipe beam device that crosses a railway line, and an object of the present invention is to facilitate construction work.
[0002]
[Prior art]
The gate-shaped beam is composed of multiple horizontal members connected by flanges and vertical legs fixed to both ends, but it is difficult to connect each member in the air. The method of lifting and lowering it to the treatment position has been adopted. First, the vertical legs at both ends are planted on the ground, and then the horizontal beams are connected via bent pipes. However, in the former method, when the lower track has three to four lanes, the connected horizontal member is about 20 m. The legs at both ends are 7 to 8 m high and heavy. The beam also bends due to the weight of the legs. It is very difficult for a skilled person to lift this and place both legs in the treatment position. Moreover, in the latter method, the connection bolt holes of the connection flanges of the respective members do not match due to installation errors and bending of the steel pipe, so that welding connection is sometimes required.
[0003]
[Means for Solving the Problems]
A pillar is erected in advance at a prescribed position with a concrete pipe. The horizontal side of the key-shaped bent tube is fixed to both ends of the horizontal beam. Depending on the height of the pillar, another vertical steel pipe may be connected to the vertical side of the hook-shaped bent pipe. The vertical side of the bent pipe or the end of the vertical steel pipe in some cases is a small-diameter pipe that can be easily inserted into the concrete pipe, and a flange that can be locked at the edge of the concrete pipe is provided. When this is inserted, cement milk is poured into a concrete pipe in advance. The small-diameter tube is inserted halfway over this, and injection is continued. A milk receiving plate is fixed to the inner surface of the concrete pipe at a height where a milk layer having an appropriate thickness can be formed on the bottom surface of the small-diameter pipe.
[0004]
【Example】
Reference is made to the drawings. The column 1 of the concrete pipe has a disk 1a fixed inside at a predetermined depth from the top. The horizontal beam 2 is formed by connecting a plurality of steel pipes so as to face both pillars beside the track, or is connected sequentially after a bent pipe 3 to be described later is temporarily fixed to a concrete pipe. The bent tube 3 has a key shape, and is fixed to one end of the horizontal beam at one side. On the other side, there is provided a small-diameter tube 3a that can be easily inserted into the center hole of the column 1, and a flange 3b that is locked to the edge of the column when inserted to a predetermined depth. If the height of the column 1 is insufficient, another vertical steel pipe (not shown) is connected, and a small-diameter pipe 3a and a flange 3b are provided at the tip. Cement milk 4 is filled and solidified in the outer peripheral gap of the small diameter portion 3a, the space from the bottom surface of the small diameter tube to the disk 1a, and the hollow hole of the small diameter tube.
[0005]
The filling of the milk is carried out by the following method. First, after the milk is appropriately injected onto the disk 1a, the horizontal beam is lowered, and when the small-diameter pipe 3a is inserted to a certain depth, the lowering is temporarily stopped, and the injection is performed from the outer circumference of the small-diameter pipe. When it is determined that an appropriate amount has been injected, the horizontal beam is lowered again to bring the flange 3b into contact with the upper end of the pillar. Milk solidifies in a few days.
[0006]
This work is performed when the train does not pass, for example, during a limited time period at midnight. If the time expires before the milk injection, the horizontal beam 2 is temporarily fixed on both pillars 1 by a pair of temporary fasteners 5 shown in FIGS. This metal fitting is provided with fastening pieces 5a and 5b on the upper and lower sides of a semi-circular body capable of holding a cylindrical body. The upper end of the pillar 1 at the lower end and the vertical side of the bent tube 3 at the upper end. Tighten and fix. This metal fitting is used after the cement milk is injected and before the milk solidifies when removing the crane that suspends the horizontal beam.
[0007]
【The invention's effect】
A concrete pipe is used for both legs 1, and a connection structure between the steel pipe and a steel bent pipe 3 fixed to both ends of a horizontal beam 2 or a vertical steel pipe (not shown) connected thereto is formed by a bent pipe (or The small diameter portion 3a provided at the tip of the vertical steel pipe) is inserted into the top end hole of the concrete pipe and solidified with the cement milk 4, so that even if there is a bending of the steel pipe beam or mounting error, it is absorbed. And can be mounted.
[Brief description of the drawings]
FIG. 1 is a front view of the present invention.
FIG. 2 is a front view near a column top.
FIG. 3 is a plan view of a fastener.
FIG. 4 is a front view of a fastener.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pillar 2 Horizontal beam 3 Bent tube 3a Small diameter tube 3b Flange 4 Cement milk 5 Temporary fitting

Claims (1)

A pair of concrete pipe pillars that are erected on both sides of the railroad track and have a milk receiving disk fixed at a predetermined depth from the top, a steel horizontal beam straddling both pillars and facing the top, and folded into a key shape One side of the bend is fixed to the end of the horizontal beam, and the other side is a steel bent tube provided with a small-diameter portion that can be inserted into the column directly or through a vertical steel tube and a flange that can be locked at a predetermined depth; And a cement milk filling the gap between the inside and the outside of the bent pipe.

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