JP2533663Y2 - Joint of steel unit for underground wall - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint of a steel unit for an underground wall.

[0002]

[Purpose of the Invention] The present applicant first connects a steel unit for an underground wall into the ground and penetrates or installs it, and then excavates one side of the unit and welds the exposed excavation side connection part. (See Japanese Patent Application No. 306655). An object of the present invention is to provide a joint of a steel unit body for an underground wall suitable for carrying out the above construction method.

[0003]

The construction of the joint of the steel unit for underground wall according to the present invention is characterized by a flat plate extending to both sides flush with the flange on one side of the steel unit for underground wall. In the protruding portion, the end surfaces of both protruding portions are formed as slopes, and female fittings extending outward beyond the end face of the protruding portion are provided on the inner and outer surfaces of the tip of the protruding portion extending to one side, and the other side. Male fittings consisting of round bars are welded to the inner and outer surfaces of the tip of the protruding part, respectively, and the inner part of the female fitting is plate-shaped, while the outer one is bar-shaped and is in the height direction of the protruding part. Arranged at appropriate intervals, and in the state where the corresponding female and male fittings of the adjacent steel unit for underground wall are engaged, they are backed by the inner female fitting between the end faces of the opposing protrusions. The point is that a groove for welding is formed.

The base material of the steel unit for underground wall of the present invention is generally an H-type (including a box H-type) steel sheet pile.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a base material of an underground wall steel unit to which the joint of the present invention is applied, and is flush with both flanges 3 and 4 on both sides of a rectangular cylindrical portion 2 thereof. The end faces 9, 10 of the protruding portions 7, 8, which are flush with the flange 4 on the digging side, of the flat protruding portions 5, 6, 7, 8 extending to both sides, respectively, are formed on inclined surfaces. As shown in FIG. 2, female metal fittings 11, 12 extending outward beyond the end face 9 are provided on the inner and outer surfaces of the tip of the protruding portion 7, and round bars are provided on the inner and outer surfaces of the tip of the protruding portion 8. Male fittings 13 and 14 are welded.

The inner female metal fitting 11 is formed of a flat plate 15 and an L-shaped bent plate 16 and is plate-shaped, while the outer female metal fitting 12 is formed of a rod, and is formed of a bar 17 and an L-shaped bent rod 18. The protrusions 7 are arranged at appropriate intervals in the height direction (see FIG. 3).

[0007] When the steel unit for underground wall is connected or penetrated or built into the ground, the female metal fittings 11 and 12 and the projection 8 at the tip of the protruding portion 7 of the adjacent steel unit for underground wall are used. The male fittings 13, 14 at the tips of are engaged in the manner shown in FIG. 2. In this state, the female fitting 11 backs the space between the end face 9 of the protrusion 7 and the end face 10 of the protrusion 8. A groove 19 for welding is formed.

It is optional whether or not a joint is provided at the tip of the protruding portions 5 and 6 flush with the flange 3 on the ground side.

[0009] After the steel unit for the underground wall provided with the above-described joint is connected and penetrated or built into the ground, the flange 4 side is excavated to connect the exposed protruding portions 7 and 8. First, as shown in FIG. 3, partial welding 20 is applied to the portion of the groove 19 avoiding the female metal fitting 12 so as to project the projections 7, 8
Are fixed temporarily, and after removing all the female fittings 12, welding is further performed on the entire groove 19 to integrally connect the tips of the protruding portions 7 and 8 to form an underground structure. Build a solid underground wall that will be the outer wall.

[0010]

[Effect of the Invention] Since the joint of the steel unit for underground wall of the present invention is as described above, the connection by the female and male metal fittings inside the excavation side of the steel unit for underground wall is provided. In addition to the basic effect that the parts can be integrally connected by field welding to form a solid underground wall serving as the outer wall of the underground structure, the following effects can be expected. Both the female and male metal fittings on the inner and outer sides of the excavation side reliably guide the steel unit for the underground wall when penetrating or embedding it. Accuracy in the connecting direction of the unit bodies and the direction perpendicular thereto can be ensured. All can be processed with off-the-shelf materials, and processing is easy and economical. The on-site welding is a butt welding from the front, and a welded portion having good workability and being reliable in terms of strength can be easily formed. The digging side surface can eventually be flat.

[Brief description of the drawings]

FIG. 1 is a plan view of a base material of an underground wall steel unit to which a joint of the present invention is applied.

FIG. 2 is a plan view showing the engagement state of the female and male fittings at the excavation-side connection portion of the steel unit for underground wall provided with the joint of the present invention.

FIG. 3 is a front view showing a state where the digging-side connection portion is temporarily fixed.

[Explanation of symbols]

1: Base material, 2: Square tube, 3, 4: Flange, 5, 6,
7, 8: protrusion, 9, 10: end face, 11, 12: female fitting, 13, 14: male fitting, 19: groove.

Claims (1)

(57) [Scope of request for utility model registration] 1. A flat plate-like projection extending on both sides flush with a flange on one side of an underground wall steel unit, and the end faces of both projections are formed on a slope and are formed on one side. A female fitting extending outward beyond the end face of the protruding part is provided on both the inner and outer surfaces of the tip of the protruding part, and a male fitting comprising a round bar is provided on the inner and outer surfaces of the tip of the protruding part extending on the other side, respectively. Welded, the inside of the female fitting is plate-shaped, but the outside is rod-shaped and arranged at appropriate intervals in the height direction of the protrusion, corresponding to the adjacent steel unit for underground wall. In the state where the female and male fittings are engaged, a welding groove backed by an inner female fitting is formed between the end faces of the opposed protruding portions. Steel unit joint.