JP3014956B2 - Underground diaphragm wall fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground continuous wall joint for transmitting a shear force between elements in an underground continuous wall.

[0002]

BACKGROUND OF THE INVENTION When an underground continuous wall is used as an underground outer wall or a seismic wall of a building structure, it is necessary to provide a joint for transmitting a shear force between elements. As this joint, for example, as shown in Japanese Patent Publication No. 3-77888, a steel sheet having an uneven shape is provided on a partition steel sheet, and as shown in Japanese Patent Publication No. 56-30418, a steel material is provided in a ladder shape. It has been known.

[0003] When these joints are combined,
Although the shear strength of the joints can be increased, it is desirable to combine them most efficiently.

The present invention has been made in view of this point, and an object of the present invention is to provide a joint for an underground continuous wall having high shear strength by efficiently combining various joints.

[0005]

In order to achieve the above object, an invention according to claim 1 is characterized in that a partition steel plate arranged between a preceding element and a succeeding element, which are constructed by casting concrete, is provided. A flange plate, a cotter material and a horizontal bar provided on both surfaces of the partition steel plate so as to transmit a vertical shear force between the preceding element and the following element, , A plate shape including a base end portion fixed to the plate surface of the partition steel plate continuously and at a right angle and a protrusion protruding from the base end portion, the cotter material is on the plate surface of the partition steel plate The main horizontal bar is provided so as to extend in a vertical direction to the partition steel plate.

In addition, since the flange plate, the cotter member and the horizontal reinforcement are arranged at positions where the stress applied to the concrete (or the stress applied from the concrete) does not overlap, the joint has no loss in shear strength. .

Further, in the present invention, since the cotter material is fixed to and integrated with the plate surface of the partition steel plate, the cotter material does not interfere with cleaning.

Since the base end of the flange plate is continuously provided on the plate surface of the partition steel plate, water can be stopped from the ground.

Furthermore, before Kiyoko main reinforcement, said at both side ends of the partition steel plates, a plurality spaced a predetermined distance in the height direction, the flange plate, the horizontal main reinforcement a central portion of the partition steel The cotter member is provided between the pair of flange plates at a predetermined distance from the pair of the cotter members .

According to the present invention, the main horizontal bar and the flange plate are provided at separate positions so as not to contact with each other. what if,
If the horizontal reinforcement and the flange plate are provided in contact with each other, since the concrete cannot run around the horizontal reinforcement because of being hindered by the flange plate, the stress cannot be sufficiently transmitted from the concrete to the horizontal reinforcement.

In this respect, in the present invention, since the two do not come into contact with each other, the horizontal main bar can bear a large stress,
Fixing and cleaning of the horizontal main bar becomes easy.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. Drawing 1 is a figure showing the whole joint concerning an embodiment. FIG. 2 is a plan view of the joint, and FIG. 3 is a sectional view taken along line III-III in FIG.

This joint comprises a preceding element constructed by casting concrete in the area indicated by the reference numeral 100 in FIG. 1 or 2 to construct an underground continuous wall, and a reference numeral 200.
And a succeeding element constructed by casting concrete in the area indicated by a solid line so as to be able to mutually transmit vertical and horizontal shear forces.

As shown in the drawings, the joint for underground continuous wall has a partition steel plate 10, a flange plate 20, a cotter member 30, and a horizontal main reinforcement 40.

The partitioning steel plate 10 is disposed between the preceding element and the following element. Concrete of the preceding element is partitioned on one plate surface, and the concrete of the following element is separated on the other plate surface. Concrete is sectioned.

The flange plate 20 extends in the height direction on the plate surface of the partition steel plate 10 and is continuously and perpendicularly provided at the base end 2.
2 and a protruding portion 24 protruding from the base end portion 22 are formed in a plate shape. The flange plates 20 are provided as a pair near the center in the width direction on both surfaces of the partition steel plate 10.

Since the base end portion 22 is provided at right angles from the plate surface of the partition steel plate 10, the element and the partition steel plate 1
Water can be stopped at the boundary with zero.

A plurality of protrusions 24 are provided at predetermined intervals from the base end 22. In FIG.
2 are provided at three places. Specifically, the protrusion 24
Has a trapezoidal shape with the base end 22 side as the base, or a honeycomb shape. When the cast concrete goes around in the area between one protrusion 24 and the lower or upper protrusion 24, the upper and lower oblique sides of the protrusion 24 can resist the bearing pressure or shear of the cast concrete. Become. Thus,
The protrusion 24 is one of the in-plane shear resistance elements of the partition steel plate 10.

The cotter member 30 is disposed in a bar shape so as to be oriented horizontally on the plate surface of the partition steel plate 10, and
The partition steel plate 10 is provided between the pair of flange plates 20 at the center of both surfaces. Also, a plurality of cotter members 30 are provided at predetermined intervals in the height direction of the partition steel plate 10.

More specifically, as shown in FIG. 3, each cotter member 30 is provided at a height position corresponding to the middle of the upper side of the trapezoid formed by the projection 24 of the flange plate 20. In this way, when the cotter member 30 is provided on the partition steel plate 10, the thickness of the cotter member 30 protrudes from the plate surface, so that the cotter member 30 becomes a resistance element against the cast concrete. Moreover, the cotter material 30
As shown in FIG. 2, since the both ends are provided so as not to contact the flange plate 20, the cast concrete wraps around both end portions thereof, and the shearing force can be transmitted effectively.

Further, since the cotter member 30 is provided on the plate surface of the partition steel plate 10, it does not hinder the cleaning operation when cleaning the plate surface of the partition steel plate 10.

The horizontal main reinforcing bars 40 are reinforcing bars vertically penetrating through both ends in the width direction of the partition steel plate 10, and are provided at a predetermined interval in the height direction. In addition, each horizontal main bar 4
0 is connected and reinforced by a plurality of auxiliary muscles 42 extending in the height direction. And the horizontal main reinforcement 40 also becomes a resistance element to the cast concrete. Since the horizontal main reinforcement 40 is also provided so as not to contact the flange plate 20, the concrete poured around the periphery can effectively transmit the shearing force, and also the operation of fixing the horizontal main reinforcement 40 and the operation of cleaning. Can be easily performed.

Further, the present embodiment is characterized in the arrangement of the flange plate 20, the cotter member 30, and the horizontal main reinforcement 40 as resistance elements.

That is, as shown in FIGS. 2 and 3, the flange plate 2 is used as a resistance element against cast concrete.
A range 26 in which 0 affects, a range 36 in which the cotter material 30 affects, and a range 46 in which the horizontal main bar 40 affects.
And are arranged so as not to overlap.

Therefore, since the resistance obtained by each resistance element is exerted at 100%, the shear strength can be increased as a whole. Further, since the forces applied by the resistance elements to the cast concrete do not overlap, the forces are not concentrated at one place, and damage to the cast concrete can be prevented.

The joint according to the present embodiment is used in the same manner as a conventional joint to construct an underground continuous wall, and a detailed description of the construction method is omitted.

[0027]

[Brief description of the drawings]

FIG. 1 is a view showing an entire joint according to an embodiment.

FIG. 2 is a plan view of the joint shown in FIG. 1;

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Partition steel plate 20 Flange plate 22 Base end part 24 Projection part 30 Cotter material 40 Horizontal main reinforcement

Continued on the front page (72) Inventor Osamu Kaneko 1-7-1, Kyobashi, Chuo-ku, Tokyo Inside Toda Construction Co., Ltd. (72) Inventor Hitoshi Morimoto 2-3-5 Misakicho, Chiyoda-ku, Tokyo Tekkaken Construction Co., Ltd. (72) Inventor Masato Sakai 2-3-5 Misaki-cho, Chiyoda-ku, Tokyo Teppei Construction Co., Ltd. (72) Inventor Tatsuo Fujiwara 2-3-5 Misaki-cho, Chiyoda-ku, Tokyo Teppetsu Construction ( 56) References JP-A-58-153815 (JP, A) JP-A-56-67016 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 5/18-5/20

Claims (1)

(57) [Claims] 1. A partition steel plate disposed between a preceding element and a succeeding element which are constructed by casting concrete, and transmitting a vertical shear force between the preceding element and the following element. As possible, a flange plate provided on both sides of the partition steel plate, a cotter material and a horizontal bar,
The flange plate has a plate shape including a base end portion fixed to the plate surface of the partition steel plate continuously and at a right angle and a protrusion protruding from the base end portion, and the cotter material is: The partition plate has a bar shape fixed on the plate surface, the horizontal reinforcing bars are provided so as to extend in a direction perpendicular to the partition steel plate, the flange plate, the cotter material and the horizontal reinforcing bars, each stress given to the concrete Are arranged at positions where they do not overlap with each other, and the horizontal main reinforcing bars have heights at both end portions of the partition steel plate.
Are provided at predetermined intervals in the direction, the flange plate is a central portion of the partition steel plate,
A position apart a predetermined distance from the lateral main reinforcement, provided with a pair, said cotter material, underground continuous wall joint, characterized in Rukoto provided on said pair of flanges plates.