Z-shaped steel sheet pile, and steel sheet pile wall formed from said Z-shaped steel sheet pile

Abstract

This Z-shaped steel sheet pile (1) has: a first joint section (5) formed at the tip of a fist flange section (3) configuring the Z-shaped steel sheet pile (1); and a second joint section (9) formed at the tip of a second flange section (7). A steel sheet pile wall (27) can be formed by disposing Z-shaped steel sheet piles (1) adjacent to each other, and linking the first joint sections (5) and the second joint sections (9) by causing the engagement thereof. The Z-shaped steel sheet pile (1) is characterized by: the first joint section (5) being a double claw joint section having a primary claw (13), which has an expanded section (11) at the tip and is disposed at the inside of the steel sheet pile, and an auxiliary claw (15), which is formed in a manner so as to face the primary claw (13) and is disposed at the outside of the steel sheet pile; and the second joint section (9) being a double claw joint section having a primary claw (13), which has an expanded section (11) at the tip and is disposed at the outside of the steel sheet pile, and an auxiliary claw (15), which is formed in a manner so as to face the primary claw (13) and is disposed at the inside of the steel sheet pile.

Description

technical field [0001] The present invention relates to a Z-shaped steel sheet pile used for harbor and river revetment, a guard plate, and cofferdam construction in the civil engineering field, and a steel sheet pile wall formed of the Z-shaped steel sheet pile. [0002] In the present specification, the Z-shaped steel sheet pile refers to a steel sheet pile having a substantially Z-shaped overall shape in which flanges are formed at both ends of an obliquely arranged web (web) so as to be continuous with the web. Background technique [0003] U-shaped steel sheet piles, Z-shaped steel sheet piles, or hat-shaped steel sheet piles are generally used as steel sheet piles used in harbor and river revetment, guard plates, and cofferdam constructions in the civil engineering field. In addition, the linear steel sheet pile is mainly used in the steel sheet pile small house (cell) construction method. The said steel sheet pile is used as a steel wall by connecting joint parts. ...

AI Technical Summary

Problems solved by technology

[0021] On the other hand, since the shape of the Z-shaped steel sheet pile does not restrain the soil like the U-shaped steel sheet pile and the hat-shaped steel sheet pile, it is easy to drive the Z-shaped steel sheet pile due to ground resistance when driving. Rotation, etc. occur, so a large force is generated at the joint

As mentioned above, the Larsen-type joint part is relatively weak against tensile force and rotational force. On the other hand, its degree of freedom is low. Therefore, there is a problem that the joint part is easily deformed. more obvious

[0023] Even after the steel sheet piles are driven in, the steel sheet piles receive force from the foundation, especially in the event of an earthquake, etc., for Larsen joints that are relatively weak in tension and strong in restraint , there is a problem that it is easy to deform at the joint part

If the joint part is deformed, there will be a problem that the water-stopping effect will be reduced

[0024] As described above, there is a problem in the joint part of the Z-shaped steel sheet pile that force tends to act on the joint part during and after the driving of the steel sheet pile, so that the joint part tends to be deformed.

[0026] However, increasing the plate thickness is associated with an increase in the weight of the steel, and therefore, becomes less economical

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