JPS5925977Y2 - Joint structure of steel underground structures - Google Patents

Description

[Detailed explanation of the invention] This invention relates to the joint structure of steel underground structures such as prefabricated basements or tunnel-method linings in the shield construction method, and its purpose is to completely prevent water intrusion at the joints. The purpose is to provide a bonding structure that

Fig. 1 shows a conventional joining structure, in which bolt holes 4 are provided at predetermined intervals in a joining flange 3 of a steel panel 1 (segment) to be joined, and bolts 6 and nuts 7 are connected to each other.
The joining is performed by.

At this time, a band-shaped sealing material 5 or the like is interposed between the joining flanges 3 to make the joint portion waterproof.

FIG. 2 shows the arrangement of this band-shaped sealing material 5.
The sealing material 5 exhibits its performance by tightening the bolt 6 with force.

However, sometimes the sealing material 5 is subjected to a strong compressive force, so that it protrudes to a large extent as shown in FIG. 3, and is of no use.

In particular, once the outside of the steel panel 1 protrudes, repair is almost impossible because the work must be done inside a hole.

This invention was proposed to solve the above-mentioned conventional drawbacks, and will be explained below based on the illustrated embodiments (FIGS. 4 and 5).

The steel panel 1 consists of a skin plate 2 on the outer surface and a joining flange 3 provided on the inner periphery, and the joining flanges 3 are bolted together to form a prefabricated basement or the like.

In this joint portion, two strips of sealing material 5 are interposed between the inner and outer sides of the joint flanges 3.

Further, between the steel panels 1 to be joined, one of the skin plates 2 protrudes to the side of the joining flange 3 to cover the outside of the joining portion.

Reference numeral 9 in the figure indicates a protruding portion of the skin plate 2, and by covering the outside of the joint portion, the outer sealing material 5 is prevented from protruding when the bolt 6 is tightened.

In addition, in order to implement this idea, it is necessary to use a steel panel 1 in which the skin plate 2 protrudes to the side of the joint flange 3 as described above, for example, a steel panel in the shape of a rectangular flat plate. In this case, as shown in the schematic plan views of FIGS. 6 to 10, the skin plate 2 has a protruding portion 9 on one side, two sides, three sides, or the entire circumference, or a protruding portion 9
The joint structure of this invention can be adopted in all joint parts by suitably combining those without the above according to the design.

As the sealing material 5, a hard material such as a butyl rubber sealing material, a silicone sealing material, a polyurethane sealing material, an epoxy rubber sealing material, etc., which has elasticity and is highly watertight and airtight, is used.

This invention has the above structure, and since the protruding skin plate covers the outside of the joining part, the sealing material will not protrude outside even if the bolts are joined with strong tightening force.

Therefore, the water-stopping effect of the sealing material is fully exhibited, and there is no need for repair.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional joint structure, Figs. 2 and 3 are front views showing the position of the sealing material, and Figs. 4 and 5.
The figures are cross-sectional views showing the joint structure of this invention, Figures 6 to 10.
The figure is a schematic plan view of a steel panel. 1...Steel panel, 2...Skin plate, 3...Joining flange, 4...Bolt hole, 5...Sealing material , 6...Bolt, 7...Nut, 8...Washer, 9.
・・・Protruding part.

Claims (2)

[Scope of utility model registration request] (1) In the joint structure of a steel underground structure, in which a plurality of steel panels each having a joint flange provided on the inner periphery of a skin plate on the outside surface are joined by bolts with a sealing material interposed between the joint flanges. A joint structure for a steel underground structure, characterized in that one skin plate of the steel panels to be joined protrudes to the side of the joint flange to cover the outside of the joint part. (2) The joint structure for steel underground structures according to claim 1, wherein the sealing material is a band-shaped sealing material, and two sheets are interposed on the inside and outside of the joining flange.