JP2002047643A - Structural member, underground row wall member and method of manufacturing the same - Google Patents

Abstract

(57) [Problem] To provide an underground row wall member having a section modulus corresponding to a required section modulus, and an object of the present invention is to provide a method of manufacturing the same. SOLUTION: A groove-shaped strip 1 having a joint 1 on one end side.
And a groove-shaped strip 2 having a joint 2 which can be freely connected to the joint 1 on one end side, with the concave portions of the respective grooves being opposed to each other so that the joint 1 and the joint 2 are on the outside. By shifting and joining, an underground row wall member having a tubular shape as a whole is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground row wall member used for construction of structures such as earth retaining walls, foundations, and underground walls in the fields of civil engineering and construction. TECHNICAL FIELD The present invention relates to an underground row wall member whose section modulus can be easily changed according to strength or rigidity, and a method for manufacturing the same.

[0002]

2. Description of the Related Art In the field of civil engineering and construction, steel sheet piles, round steel pipe sheet piles, square steel pipe sheet piles and the like are used as core materials for building underground row walls.

FIG. 5 is a cross-sectional view illustrating an underground row wall using a conventional steel sheet pile. In FIG. 5, a steel sheet pile 10 is provided with a web 11, a flange 12, and a joint 13 installed on a side edge of the flange 12, and is integrally formed by rolling.
The joints 14 of the steel sheet piles 10 adjacent to each other are arranged alternately up and down with respect to the neutral shaft 14 (on the center line in the wall direction of the underground row wall), and are sequentially connected to form the underground row wall. .

The section performance (section coefficient) of the underground row wall is mainly determined by the distance h from the neutral shaft 14 to the web 13 and the thickness t of the web. (Prior Art 1) FIG. 6 is a front view illustrating an underground row wall using a conventional round steel pipe sheet pile.
In FIG. 6, a round steel pipe sheet pile 20 includes a steel pipe 21 and a steel pipe 2.
1 has a male joint 22 and a female joint 23 installed on the outer surface, and the adjacent steel pipes 21 are connected to each other by connecting the male joints 22 and the female joints 23 to form an underground row wall. ing. The male and female joints are welded to the left and right of the round steel pipe along the center line in the wall direction of the underground row wall. The cross-sectional performance of a round steel pipe sheet pile is determined by the steel pipe diameter and the sheet thickness. (Prior art 2) FIG.
FIG. 1 is a perspective view for explaining a conventional square steel pipe sheet pile disclosed in Japanese Patent Application Laid-Open No. 57-151725. In FIG. 7A, the square steel pipe sheet pile 30 is formed by welding a straight steel sheet pile to a flange member 31 and attaching a web member 32 to the straight steel sheet pile 31 by welding. A male joint 33 and a female joint 34 are integrally formed on both side edges of the flange 31, respectively.

In FIG. 7 (b), the underground row wall is formed by sequentially fitting male and female joints 33 and 34 between adjacent square steel sheet piles.

[0006] The cross-sectional performance of an underground row wall made of a square steel sheet pile is mainly determined by the distance from the neutral axis (the axis connecting the center of the web 32) of the straight steel sheet pile and the thickness of the flange 31 of the straight steel sheet pile. . (Prior art 3)

[0007]

[Prior Art 1] When the section performance (section modulus) of an underground row wall is to be set to a predetermined value, the web thickness and flange height that determine the section performance of a steel sheet pile are determined. Therefore, it is necessary to change the length (distance from the neutral axis), and there is a problem that the rolling machine and the rolling process for manufacturing must be changed accordingly. Further, depending on the cross-sectional shape, a new production of the rolling machine, a review of the production line, and the like are required due to restrictions of the performance of the rolling mill, and there is a problem that the production cost is increased.

Further, when selecting a standard product (several types of cross-sectional coefficients are available) that matches the required cross-sectional modulus, one type of cross-sectional shape is selected according to the cross-sectional modulus. Therefore, when the thickness of the underground row wall is restricted, there is a problem that the underground row wall cannot be designed and constructed. [Prior art 2] Similar to prior art 1, there is a problem that it is difficult to manufacture a steel pipe sheet pile having a required section modulus, which leads to an increase in cost. In addition, when selecting a standard product that matches the required section modulus, there was a problem that underground row walls could not be designed and constructed when there were restrictions on the thickness of the underground rows. . [Prior Art 3] Similar to Prior Art 1, there is a problem that it is difficult to manufacture a straight steel sheet pile having a required section modulus, which leads to an increase in cost. In addition, when selecting a standard product that matches the required section modulus, there was a problem that underground row walls could not be designed and constructed when there were restrictions on the thickness of the underground rows. . The present invention has been made to solve such a problem, and an object of the present invention is to provide an underground row wall member having a section modulus according to a required section modulus, and an object thereof. .

[0009]

A structural member and an underground row wall member according to the present invention have the following features. [1] A groove-shaped strip member 1 having a joint 1 on one end side and a groove-shaped strip member 2 having a joint 2 which can be connected to the joint 1 on one end side, and concave portions of the respective grooves are opposed to each other. In addition, the joint 1 and the joint 2 are joined while being shifted from each other. [2] A groove-shaped strip member 1 having a joint 1 on one end side and a groove-shaped strip member 2 having a joint 2 connectable to the joint 1 on one end side, and the concave portions of the respective grooves are opposed to each other. In addition, the male joint and the female joint are shifted from each other and joined to form a tubular shape as a whole. [3] The section modulus is freely changeable by changing the range in which the concave portions of the grooves of the strip 1 and the strip 2 oppose each other.

Further, the method for manufacturing an underground row wall member according to the present invention has the following features. [4] A groove-shaped strip 1 having a joint 1 on one end side and a groove-shaped strip 2 having a joint 2 freely connectable to the joint 1 on one end side, each of the joint 1 and the joint A step of arranging the concave portions of the grooves so as to face each other, and changing a facing range of the strip material 1 and the strip material 2 according to a desired value of a section modulus per unit length in the width direction. 1 and a step of joining the strip material 2.

[0011]

[First Embodiment] FIG. 1 is a front view illustrating one embodiment of a structural member and an underground row wall member according to the present invention. In FIG. 1, an underground row wall member 1 has a substantially U-shaped strip 2 and a substantially U-shaped strip 3, and has a rectangular cross-section closed in a tubular shape. The strip 2 has a web 21, a flange 22, a web 23 having a height approximately half that of the web 21, and a male joint 24 installed on a side edge of the web 23. On the other hand, strip material 3
Has a web 31, a flange 32, a web 33 having approximately half the height of the web 31, and a female joint 34 installed on a side edge of the web 33. The side edge of the web 21 of the strip 2 is joined to the inner surface of the flange 32 of the strip 3, and the side edge of the web 31 of the strip 3 is
2 are joined to the inner surface. Therefore, in order to form an underground row wall using the underground row wall member 1, the male joint 24 and the female joint 34 may be connected. FIG. 2 is a front view illustrating an embodiment of the structural member and the underground row wall member according to the present invention. . In the member for underground row wall shown in FIG. 2A and the member for underground row wall shown in FIG. Male fitting 24
The distance (hereinafter, referred to as a width) between the female joint 34 and the female joint 34 is changed. That is, although the members for the underground row wall in FIG. 2A and the members for the underground row wall in FIG. 2B have the same section modulus themselves, they have different widths. However, the section modulus per unit width when the underground row walls are formed is different. 2A shows an underground row wall member having a large section modulus, and an underground row wall member having a width a is compared with an underground row wall member having a width b. , Approximately a / b times. [Embodiment 2] Fig. 3 is a front view illustrating another embodiment of the structural member and the underground row wall member according to the present invention. In FIG. 3A, the underground row wall member 1 is substantially U-shaped.
It has a tubular shape closed by a strip member 4 of a straight shape and a strip member 5 of a substantially U-shape. The strip 4 has a web 41, a flange 42, a web 43, and a male joint 44 installed on a side edge of the web 43. On the other hand, the strip 5 is a web 5
1, a flange 52, a web 53, and a female joint 54 installed on a side edge of the web 53. Then, the side edge of the web 41 of the strip 4 is joined to the inner surface of the web 53 of the strip 5, and the side edge of the web 51 of the strip 5 is
3 is joined to the inner surface. Therefore, in order to form an underground row wall using the underground row wall member 1, the male joint 24 and the female joint 34 may be connected. When the joining position between the strips 4 and 5 is changed, the horizontal distance between the male joint 44 and the female joint 54 changes, and at the same time, the distance between the flange 42 and the flange 52 from the neutral shaft changes. It is possible to change the section modulus of the wall member itself. Furthermore, when the underground row wall member is formed using this underground row wall member, the section modulus per unit width can be changed. Note that the strip members 4 and 5 are not limited to this, and may be arcs in cross section (shown in FIG. 2B), ellipses in cross section (shown in FIG. 2C). When a large section modulus is required, a strip having a large flange thickness may be used (illustrated in FIG. 2D).
FIG. 4 is a front view illustrating one embodiment of a joint between a structural member and an underground row wall member according to the present invention.
In FIG. 4A, a male joint 44 having a rectangular cross section provided on the flange 43 of one of the members and a female joint 54 having a rectangular cross section provided on the flange 53 of the other member are engaged and rolled. I have. These joints may be formed integrally with the flange by rolling, or may be joined by welding. FIG. 4 (b) shows a male joint 64 having a circular cross section provided on the flange 63 of one of the members and a female joint 74 having a circular cross section provided on the flange 73 of the other member. I have.

Further, FIG. 4 (c) shows a joint 84 having an arc cross section installed on the flange 83 of the strip, and a joint 84 having an arc cross section installed on the flange 83 of the same strip. Have been relocated. FIG. 4D shows a joint 94 having a substantially J-shaped cross section installed on the flange 93 of the strip, and a joint 94 having a substantially J-shaped cross section installed on the flange 93 of the same strip. It is tied. Note that the joint of the present invention is not limited to this, and may have any shape without departing from the spirit of the present invention.

[0013]

According to the above-described structural member, underground row wall member, and method of manufacturing the same according to the present invention, the following remarkable effects can be obtained. 1) It is possible to obtain an underground row wall member whose section modulus can be easily changed according to the bending strength or rigidity required as a structural member or an underground row wall member. 2) A method of manufacturing an underground row member that can easily change the section modulus using a normal strip according to the bending strength or rigidity required as a structural member or an underground row member. Provided.

[Brief description of the drawings]

FIG. 1 is a front view illustrating an embodiment of a structural member and an underground row wall member according to the present invention.

FIG. 2 is a front view illustrating an embodiment of a structural member and an underground row wall member according to the present invention.

FIG. 3 is a front view illustrating another embodiment of the structural member and the underground row wall member according to the present invention.

FIG. 4 is a front view illustrating one embodiment of a joint between a structural member and an underground row wall member according to the present invention.

FIG. 5 is a front view illustrating an underground row wall using a conventional steel sheet pile.

FIG. 6 is a front view illustrating an underground row wall using a conventional round steel pipe sheet pile.

FIG. 7 is a perspective view illustrating a conventional square steel sheet pile.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Underground row wall member 2 bar material 3 bar material 4 bar material 5 bar material 21 web 22 flange 23 web 24 male joint 31 web 32 flange 33 web 34 female joint 41 web 42 flange 43 web 44 male joint 51 web 52 flange 53 Web 54 Female joint 64 Male joint 74 Female joint 84 Joint 94 Joint

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D049 EA02 FB03 FB14 FC02 2E125 AA68 AE13 AG07 AG41 BB08 BB18 BB19 BB25 BC02 BD01 BE08 BF05 CA91 EA00 2E162 CB02 GB01

Claims (4)

[Claims] 1. A groove-shaped strip 1 having a joint 1 on one end side.
And a groove-shaped strip 2 having a joint 2 that can be freely connected to the joint 1 on one end side, and joining the joint 1 and the joint 2 while displacing the concave portions of the grooves with each other. A structural member characterized by the above-mentioned. 2. A groove-shaped strip 1 having a joint 1 at one end.
And a groove-shaped strip 2 having a joint 2 that can be freely connected to the joint 1 on one end side, and joining the joint 1 and the joint 2 while displacing the concave portions of the grooves with each other. A member for an underground row wall, wherein the entire member is formed in a tubular shape. 3. The underground row wall according to claim 1, wherein the section modulus can be changed by changing the range in which the concave portions of the respective grooves of the strip 1 and the strip 2 oppose each other. Parts. 4. A groove-shaped strip 1 having a joint 1 at one end.
A step of arranging a groove-shaped strip 2 provided with a joint 2 freely connectable to the joint 1 on one end side, with the concave portions of the respective grooves of the joint 1 and the joint 2 facing each other; According to the desired value of the section modulus per unit length, the opposed range of the strip 1 and the strip 2 is changed,
And a step of joining the strip member 2 to the underground row wall member.