JPH027940Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a joint device for reinforced concrete sheet piles used as earth retaining walls with low wall heights and retaining walls for bank protection. More specifically, the present invention relates to a joint device that connects adjacent reinforced concrete sheet piles and has watertightness between the sheet piles.

[Prior Art] Conventionally, as this type of device, a concave groove strip having a groove portion with a substantially circular cross section reinforced with a reinforcing plate buried in concrete is installed on one side of a flat joint end surface of adjacent concrete panels. A connecting device for concrete panels has been proposed (Utility Model Application No. 58-185626), in which a locking bulging strip is provided on the other end of the joint end surface to fit into the groove.

[Problems to be solved by the invention] However, in the conventional device, the inner diameter of the groove of the concave groove and the outer diameter of the bulging strip are almost equal, so although the device has high watertightness, the bulging strip is not used during construction. There was a problem that made it difficult to insert. In addition, since the joint end surfaces of the device are flat, the base of the bulging strip is exposed between the panels in the connected state, and if rust occurs in this part, the rust will be visible from the outside. When concrete walls were constructed in areas where concrete walls were to be constructed, there was a problem in that the exposed rusted parts became noticeable and spoiled the appearance of the concrete walls.

[Means for Solving the Problems] The configuration of the concrete sheet pile joint device of the present invention for solving the above-mentioned problems will be explained with reference to an embodiment drawing, as shown in Fig. 1. In a concrete sheet pile in which a convex line 11 continuous in the longitudinal direction is formed on one end face, and a concave groove 11 that fits into the convex line is formed on the other side, a. A female joint fitting 14 having an engagement groove 14a having a C-shaped cross section and welded to the inside of the U-shaped anchor 16 which is continuously provided in the longitudinal direction and is embedded in the concrete; The protrusion 11 is planted, the base end is welded to the front part of the linear anchor 18 buried in the concrete, and the female joint fitting 1 is attached to the tip end.
The bulging strip 1 loosely inserts into and engages with the engagement groove 14a of No. 4.
C. The width of the narrowed part of the engagement groove 14a of the female joint fitting 14 is slightly wider than the thickness of the male joint fitting 17;
and the outer diameter of the bulging strip 17a of the male joint fitting 17 is larger than the width of the narrowed portion and is 1/3 or more and 3/4 or less of the inner diameter of the engagement groove 14a; When the strip 17a is engaged with the engagement groove 14a of the female joint fitting 14 and the top end of the bulging strip 17a is pressed against the groove surface of the engagement groove 14a, there is a slight gap between adjacent concrete sheet piles. This invention relates to a joint device for concrete sheet piles characterized in that a protruding strip 14a is provided to protrude from the protruding strip 11 so that a gap is created between the protruding strips 14a.

[Example] Next, an example of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 and 2, a convex line 11 continuous in the longitudinal direction is formed on one side of the joint end surface of the reinforced concrete sheet pile 10, and a concave groove 12 that fits into this convex line 11 is formed on the other side. is formed. A female joint fitting 14 having an engaging groove 14a made of a steel pipe having a C-shaped cross section and continuous in the longitudinal direction of the sheet pile 10 is buried in the center of the groove bottom of the groove 12.
This female joint fitting 14 is sandwiched inside the U-shaped anchor 16 and welded to the anchor 16.

On the other hand, a male joint fitting 17 is installed in the center of the protrusion 11. That is, the rod-shaped anchor 18 is welded from the base end to the center of the male joint fitting 17.
In addition, the female fitting 1 is attached to the tip of the male fitting 17.
The bulging strip 17 loosely inserts into and engages the engagement groove 14a of No. 4.
a is formed.

As shown in the main reinforcement arrangement diagram on one side of the sheet pile in FIG. 3, the U-shaped anchor 16 and the rod-shaped anchor 1
8 are arranged in large numbers at intervals within the sheet pile 10, and each is buried in the sheet pile 10 by pressure molding of concrete. In addition, the bulging strip 1 on the tip side of the sheet pile 10
Although not shown, the tip of 7a is connected to the male joint fitting 1.
7 is formed into a truncated cone shape so that it can be easily inserted into the female joint fitting 14. 19 is a reinforcing bar.

The width W of the narrowed portion of the engagement groove 14a described above is slightly wider than the thickness w of the male joint fitting 17. In this example, W is 8 mm and w is 4.5 mm. The outer diameter d of the bulging strip 17a of the male joint fitting 17 is larger than the width W of the narrowed portion, and is selected from a range of 1/3 to 3/4 of the inner diameter D of the engagement groove 14a. In this example, d is 16 mm and D is 27.2 mm.

Further, as shown in FIG.
and the top end of the bulging strip 17a is in the engagement groove 14.
The protrusion length l (Fig. 2) of the protruding strip 17a from the protruding strip 11 is set so that a slight gap t is created between the adjacent concrete sheet piles 10a and 10b when pressed against the groove surface of a. be done. In this example, l is
It is 27 mm, and t is 3 mm.

[Function] In the concrete sheet pile joint device having such a configuration, the female joint fitting 14 and the male joint fitting 17 are welded to the anchors 16 and 18, respectively, and these anchors 16 and 18 are used for pressure forming of the concrete sheet pile 10. Because it is sometimes buried in concrete,
The female joint fitting 14 and the male joint fitting 17 are firmly fixed to the sheet pile 10.

Moreover, as shown in FIG. 1, when joining a new sheet pile 10b to the already driven sheet pile 10a, the bulging strip 17a of the sheet pile 10b is inserted into the engagement groove 14a of the sheet pile 17a. Although it is necessary,
In the joint device of the present invention, since the outer diameter d of the bulging strip 17a is smaller than the inner diameter D of the engagement groove 14a, it can be easily inserted. In addition, since the gap between the narrowed part of the engagement groove 14a and the male joint fitting 17 is small, the watertightness is high, and the bulging strip 17a is difficult to come out of the narrowed part of the engagement groove 14a.
In addition to the strong fixation of Nos. 4 and 17 to the sheet piles, the sheet piles 10b will not come off from the sheet piles 10a during construction.

In addition, as shown in FIG.
7 is a concrete joint, a convex strip 11 and a concave groove 12
Therefore, when the sheet piles 10 are joined, the joint fittings 14 and 17 are not visible from the outside of the sheet pile 10, and even if rust occurs on the joint fittings 14 and 17, it is not visible from the outside.

Furthermore, the length of the male joint fitting 17 is determined so that a gap t is created between the sheet piles 10a and 10b when they are joined, and the joint portion of the male joint fitting 17 and the female joint fitting 14 is set in a straight line. Sheet pile 10a for contact
and the sheet pile 10b can be bent and connected, and construction can be performed even if the construction site is a curved part.

[Effects of the invention] As described above, according to the invention, in addition to the concrete joint structure in which the joint end surface has a convex groove and a concave groove,
Unlike conventional coupling devices, the male and female coupling fittings, each circular in shape, are fixed to the sheet pile, and the male coupling fitting is loosely inserted into and engaged with the female coupling fitting. It becomes easier to fit and can shorten the construction period. In addition, even if rust occurs on the joints, the concrete joints cover the rust and the rust is not visible from the outside, so the appearance of the sheet piles is not impaired and can be maintained for a long period of time.

In particular, if the gap between the narrowed part of the engagement groove of the female joint and the male joint is made small, the joint will be securely engaged and will not come off, resulting in a highly watertight joint device.

Furthermore, by setting the protrusion length of the male joint fitting to be long, it becomes possible to perform construction on curved sections.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part showing an engaged state of a joint device according to an embodiment of the present invention. FIG. 2 is a sectional view of the entire sheet pile including the joint device. Figure 3 is a reinforcement diagram of the main part of one side of the sheet pile. 10: Reinforced concrete sheet pile, 11: Convex strip, 1
2: concave groove, 14: female joint fitting, 14a: engaging groove, 16, 18: anchor, 17: male joint fitting, 17a: bulging strip.

Claims (1)

[Scope of Claim for Utility Model Registration] In a concrete sheet pile in which a convex line continuous in the longitudinal direction is formed on one side of the joint end surface of adjacent reinforced concrete sheet piles, and a groove that fits into the convex line is formed on the other side, An engagement groove having a C-shaped cross section is provided continuously in the longitudinal direction of the sheet pile in the center of the groove bottom of the groove, and is welded to the inside of the U-shaped anchor buried in the concrete. (b) A female joint fitting having a base end welded to the front part of a straight anchor that is implanted in the protruding strip and buried in the concrete, and a distal end that has a loose fit in the engagement groove of the female joint fitting. (c) the width of the narrowed part of the engagement groove of the female fitting is slightly wider than the thickness of the male fitting; The outer diameter of the bulging strip of the fitting is larger than the width of the narrowed portion and 1/3 or more and 3/4 or less of the inner diameter of the engagement groove, and (d) the bulging strip of the male fitting fits the engagement of the female fitting. When engaged with the mating groove and with the top end of the protruding strip pressed against the groove surface of the engagement groove, the protruding strip is separated from the protruding strip so that a slight gap is created between adjacent concrete sheet piles. A joint device for concrete sheet piles, characterized in that it is provided in a protruding manner.