JPH09310341A - Watertight splice for concrete sheet pile, and joint member for splice - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve correctness in driving-in and watertightness for concrete sheet piles by a method wherein a joint member made of high elastic resin by extrusion molding in a hooklike S-shaped section is buried in the connecting end face of the concrete sheet pile, being integral with the sheet pile, and the sheet piles are driven into the ground with the joint members of adjoining sheet piles engaged with each other. SOLUTION: Joint members each having an engaging part 2a (2b) composed of a projected part and a recessed part are buried in connecting end faces of concrete sheet piles 1a and 1b used in a retaining wall or a revetment at a harbour and made integral with each of the sheet piles with a plurality of anchors. Then, the projected part at a hook shape of the joint member at one sheet pile is fitted into the recessed part at the hook shape of the joint member at the adjoining sheet pile, and driving-in is executed with the adjoining sheet pile used as a guide. With the concrete sheet piles driven in successively, a wall is constructed and joined parts of the sheet piles are kept from opening. With flexible sealing pieces provided integrally at straight parts of the S-shaped joint member, watertightness can be ensured for a gap when the sheet piles 1a and 1b are joined together. Thereby, correctness can be maintained in driving-in while watertightness can be ensured almost in perfect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a watertight joint of concrete sheet piles formed on a joint surface of a concrete sheet pile used for a revetment or earth retaining wall with an adjacent sheet pile and a joint joint material for forming the watertight joint.

[0002]

2. Description of the Related Art Conventionally, steel sheet piles have been used to construct earth retaining walls, revetments for rivers and harbors, built islands, and water blocking walls. This sheet pile has the advantages that long lengths can be easily obtained by welding, and that the joints have a meshing structure, so they have mutual guide functions, but durability such as salt resistance and acid resistance. However, there is a drawback in corrosion resistance, and from these viewpoints, concrete sheet piles have become popular.

In concrete sheet piles, the joint structure is flat, grooved, corrugated, or abutting concavo-convex fitting, the joining force between the sheet piles is weak, and various measures are required to ensure watertightness. There was

[0004]

[Problems to be Solved by the Invention] Concrete sheet piles are
As described above, the structures of the joint portions are not in a shape that engages with each other, and therefore the joint joint may open depending on the driving precision. If the driven sheet pile is visible on the ground,
It may be struck again, but there is a possibility that the joint is open when the sheet pile that has been driven into the ground cannot be seen.

In order to solve the above problems, it is an object of the present invention to provide a novel watertight joint for concrete sheet pile and a joint joint material used therefor.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and has a hooked S-shaped cross section along the lengthwise direction at the end face of a concrete sheet pile joined to an adjacent sheet pile. A watertight joint for a concrete sheet pile, characterized in that engaging portions of the same shape and in opposite directions, which have concave-convex strips and engage with each other, are formed of joint material.

As a joint joint material for forming this watertight joint, a U-shaped groove having a hook-shaped cross section and a groove having the same shape as the internal shape of the groove formed at the edge of the groove are used. A joint joint material for concrete sheet piles, characterized by being a synthetic resin extruded product, comprising a hook-shaped ridge that engages with the groove and a plurality of cross-section anchors that project to the back side and are embedded in concrete. provide.

The hook-shaped S-shape is not a simple S-shaped corrugated concavo-convex shape, but an S-shape in which a U-shaped concave portion is inserted on the back side of the convex portion.
Say the glyph. When the concave portion and the convex portion are engaged with each other, the adjacent sheet piles are coupled to each other and resist the separation and shearing of the sheet piles. Further, the joint material of the present invention is an extruded material of a highly elastic resin, and for example, highly elastic vinyl chloride is suitable.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 4 is a perspective view of a conventional watertight PC concrete sheet pile 1a, 1b, in which joint grooves have concave grooves 31a, 31b and convex ridges 32a, 3b, respectively.
2b is formed. The joint material shown in FIG. 5 was used for the groove and the ridge. FIG. 5 shows a joint structure of a conventional concrete sheet pile. As shown in FIG. 5 (a), a groove 31 and a ridge 32, which are opposed to each other, are provided on the joint end surfaces of the adjacent sheet piles 1a and 1b. This groove 31
In order for the head of the joint material 33 having elasticity to be located inside,
By embedding the leg portion of the joint material 33 in the end face of the other side,
As shown in (b), the joint material 33 was brought into solid contact with the concave groove 31 to form a watertight joint. FIG. 6 shows a cross section of the steel sheet pile 41. The steel sheet pile 41 has a U-shaped pawl 42 at its end that engages with an adjacent sheet pile, and the pawls 42 mesh with each other to connect the sheet piles together. It played the role of a driving guide.

The watertight joint of the concrete sheet pile of the present invention is
The same effect as that of the claw 42 of the steel sheet pile 41 is produced, and an even more excellent effect is exerted. FIG. 1 is a sectional view showing a watertight joint for a concrete sheet pile according to an embodiment of the present invention. Engaging portions 2a and 2b, which form a concavo-convex strip having a hook-shaped S-shaped cross section, mesh with the joint end surfaces of the concrete sheet piles 1a and 1b to form a watertight joint. FIG. 2 shows a joint end surface of an adjoining concrete sheet pile before forming the watertight joint of FIG. The protrusion 3a and the concave groove 4a of the one engaging portion 2a are adjacent to each other to form a hook-shaped S-shaped cross section. In the other engaging portion 2b, the protrusion 3b and the concave groove 4b are adjacent to each other to form a hook-shaped S-shaped cross section. The engaging portions 2a and 2b of the both have the same shape in the opposite direction. The engaging portions 2a and 2b have anchors 5a and 5b embedded in the concrete of the sheet piles 1a and 1b, respectively. FIG.
(A) (b) is a perspective view of joint material 11a, 11b which forms engaging part 2a, 2b, respectively. This joint material 11
The shape of a is provided with a U-shaped concave groove 12a having a hook-shaped cross section, a hook-shaped protrusion 13a at the edge of the concave groove 12a, and a large number of anchors 14a on the back side. It has a long cross section and is an extrusion molded product of synthetic resin. This groove 1
The internal shape of 2a and the ridge 13a have the same cross section. And this ridge engages with the groove of the other party. The anchor 14a protruding to the rear side integrates the joint material embedded in the concrete with the concrete.

The joint material 11b is exactly the same as the joint material 11a and has a shape obtained by rotating the joint material 11a by 180 degrees around the longitudinal axis. That is, it is the same product of long extrusion molding having the same cross-section, which is provided with a U-shaped concave groove 12b having a hook shape, a hook-shaped protrusion 13b, and a plurality of anchors 14b. The joint materials 11a and 11b are provided with projecting flexible sealing pieces 15a and 15b on their end surfaces that come into contact with each other, and seal surfaces 16a and 16b are formed at the positions where they are brought into contact with the mating side. As can be seen from FIG. 1, when the sheet piles 1a and 1b are installed adjacent to each other, the contact surfaces are sealed with each other to ensure watertightness.

[0012]

According to the present invention, it is possible to obtain a coupling force between sheet piles, which has been conventionally obtained only with steel sheet piles, and to realize almost perfect water-tightness. It became a guide and it became possible to drive the sheet pile accurately.

[Brief description of drawings]

FIG. 1 is a sectional view showing a watertight joint of a concrete sheet pile according to an embodiment.

FIG. 2 is a cross-sectional view showing a watertight joint of a concrete sheet pile according to an embodiment.

FIG. 3 is a perspective view showing a joint material of the concrete sheet pile of the embodiment.

FIG. 4 is a perspective view of a concrete sheet pile.

FIG. 5 is an explanatory view of a conventional watertight joint.

FIG. 6 is a profile diagram of a steel sheet pile.

[Explanation of symbols]

 1a, 1b Sheet pile 2a, 2b Engagement part 3a, 3b Convex strip 4a, 4b Recessed groove 5a, 5b Anchor 11a, 11b Joint material 12a, 12b Recessed groove 13a, 13b Convex strip 14a, 14b Anchor 15a, 15b Sealing piece 16a, 16b Sealing surface 31, 31a, 31b Recessed groove 32, 32a, 32b Convex strip 33 Joint material 41 Steel sheet pile 42 Claw

Claims (2)

[Claims] 1. A concrete sheet pile is provided with a concavo-convex strip having an S-shaped cross section in the longitudinal direction on a joint end surface with an adjacent sheet pile, and joint portions of the same shape and opposite direction where adjacent sheet piles are engaged with each other are jointed. Watertight joints for concrete sheet piles, each of which is made of wood. 2. A U-shaped concave groove having a hook-shaped cross section, a hook-shaped convex line formed at an edge of the concave groove and having a cross-section having the same shape as the internal shape of the concave groove and meshing with the concave groove, and a back surface. A joint joint material for a concrete sheet pile, which is a synthetic resin extruded product and is provided with a plurality of cross-sectioned anchors protruding to the side and embedded in concrete.