JP2000192447A - Member for underground row wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve sectional efficiency, and to easily manufacture members for underground row walls by mutually joining a plurality of channel-shaped strip materials having different ditch width under the state, in which each recessed side is arranged oppositely and both end sections of the channel-shaped strip materials having wide ditch width are extended to the outside, and forming and constituting the members in a tubular shape. SOLUTION: Each recessed side of two arcuate sectional channel-shaped strip materials 1, 2 having different ditch width is disposed oppositely, both end sections of the channel-shaped strip material 1 having wide ditch width is extended to the outside, and both end sections of the channel-shaped strip material 2 and the recessed side face of the channel-shaped strip material 1 are welded and formed in a tubular shape. Consequently, both end sections 1a, 1a of the channel-shaped strip material 1 form openings 5 among both end sections and the outer circumferential surface of the channel-shaped strip material 2. When the underground wall is formed, the directions of the adjacent members for the underground wall are opposed, the end sections 1a are inserted into each end opening 5 of the adjacent members for the underground wall, and the end sections 1a are engaged mutually respectively. Accordingly, the extended end sections 1a function as male joints without specially working joint sections, and the openings 5 function as female joints.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member for an underground row wall used in the construction of structures such as earth retaining, foundation, underground wall and well pipe in the field of civil engineering and construction, and more particularly to a member having a large strength and stopping strength. The present invention relates to an underground row wall member suitable for building a structure requiring water.

[0002]

2. Description of the Related Art H-shaped steel, round steel pipe sheet piles, square steel pipe sheet piles and the like are used as core materials for constructing earth retaining walls in the fields of civil engineering and construction. When particularly large proof stress and reliable waterproofness are required, a round steel pipe sheet pile with a joint, a square steel pipe sheet pile, or the like is used.

FIGS. 29 and 30 are explanatory views of a conventional round steel sheet pile, FIG. 29 is a sectional view of a single round steel sheet pile, and FIG. 30 is a sectional view of a state in which a plurality of round steel sheet piles are connected. It is. As shown in FIG. 29, each round steel pipe sheet pile 50 has a T-shaped male joint 51 and a P-shaped female joint 53 welded to the left and right of the round steel pipe along the center line in the wall direction of the underground row wall. ing. As shown in FIG. 30, each round steel pipe sheet pile 50 is formed by joining adjacent round steel pipe sheet piles 50 through joints and sequentially connected to form an underground row wall.

[0004] In addition to the PT type shown in FIG. 29, the shape of the joint is a PP type shown in FIG.
33 or the LT type shown in FIG.

FIG. 34 is an explanatory view of another conventional example, and is a perspective view of a square steel sheet pile 60 disclosed in Japanese Patent Application Laid-Open No. 57-151725. FIG. 34 shows a configuration in which straight steel sheet piles 61 and 63 having joints 61a and 63a integrally formed at both ends are used as flange members, and web members 65 and 67 are used.
Is attached to a straight steel sheet pile by sufficient welding and joining to form a square steel pipe sheet pile 60. And by fitting each joint of both ends, each adjacent square steel sheet pile 60
Are sequentially connected to form an underground row wall.

FIG. 35 is an explanatory view of still another conventional example, and shows a steel member 70 for underground continuous wall disclosed in Japanese Patent Application Laid-Open No. 6-280251. The underground continuous wall steel member 70 faces two unidirectional U-shaped steel sheet piles 70a, 70b (the shape of the joint is left-right asymmetric so that the U-shaped projecting directions can be aligned and connected in the same direction). It is also welded in a box shape. The male and female members 73a, 73b and the female member 71 which are integrally formed on both ends of the flange asymmetrically.
Adjacent steel members are sequentially fitted via the joints a and 71b to form an underground row wall.

[0007]

However, in the first prior art, the shape of the joint is shown in FIGS.
Various types shown in are used, but in any case, it is necessary to make a slit in the female joint,
In addition, there is a problem that welding is required to fix each joint to the round steel pipe, and it takes time to process the joint.

[0008] The second prior art square steel pipe sheet pile 60
Is higher in section efficiency (a steel weight for the same section modulus, and good section efficiency means that the steel weight for the same section modulus is lighter) as compared with a round steel pipe sheet pile. Since the girder height in the wall thickness direction of the wall can be reduced, the diameter of the soil cement column can be reduced when used for a core material such as a soil cement column wall. Also, since the joint uses a straight steel sheet pile integrally formed with the flange, there is an advantage that there is no need to process the joint member and weld the main body.

[0009] However, since the joint portion protrudes outward from the flange surface, if the protuberance is installed directly on the underground row wall surface (square steel sheet pile face) on the excavation side, the external force acting on the square steel pipe sheet pile 60 is increased. However, there is a risk that the joints are concentrated at the joints, the joints are deformed, and the underground row wall falls. In order to prevent this, thinning concrete must be constructed in the gap between the uprighting and the square steel sheet pile 60 so that the external force applied to the square steel sheet pile 60 is evenly applied to the uprighting, and the number of construction steps increases. There is a problem that the cost increases.

Further, in the case of the square steel pipe sheet pile 60, since the adjacent ones must be fitted at two places, the misalignment as shown in FIG. And the casting work becomes difficult. Therefore, in the construction, it is necessary to fit the two joints accurately, but when the excavation depth is deep, due to the bending of the excavation groove, the welding of the square steel pipe sheet pile 60,
There is a problem that it is difficult to fit both of them.

The third prior art has a higher sectional efficiency than the first prior art, and does not involve welding of a joint member as in the first prior art. Also, when compared with the second conventional technique in which the flange and the joint are integrally formed, the joint portion is located inside the flange surface, so that when the inside of the underground continuous wall is excavated, the wall surface becomes flat, and the belly is raised. Can be easily installed. However, according to the third prior art, the joints at both ends of the member of the single member before bonding are of two types, male and female, and need to be processed into different shapes, respectively. The shape is U-shaped, and it must be machined in the opposite direction to a normal U-shaped sheet pile. Therefore, there has been a problem that the processing cost is increased.

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 which has a high sectional efficiency and is easy to manufacture. It is another object of the present invention to provide an underground row wall member with a joint that is excellent in waterproofness.

[0013]

An underground row wall member according to the present invention comprises two grooved members having different groove widths, each having a concave side opposed to each other to form a groove having a wide groove width. It is characterized in that it is formed into a tubular shape by joining together with both ends of the strip extending outward.

[0014] The invention is characterized in that bent portions are formed at both ends of the wide groove material.

Further, the bent portion is formed in a spiral shape.

Further, the groove-shaped strip is characterized in that its center is thicker than both ends.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a sectional view of an underground row wall member according to one embodiment of the present invention. The underground row wall member is configured such that two groove-shaped members 1 and 2 having different groove widths each having an arc-shaped cross section are arranged with their concave sides facing each other, and a groove-shaped member having a wide groove width is provided. 1 are joined to each other in a state where both end portions are extended outward, and are formed into a tubular shape. In the drawing, reference numerals 3 and 4 denote welded portions between both ends of the channel-shaped strip 2 and the concave side surfaces of the channel-shaped strip 1, and by joining in this way, both ends 1a, 1a of the channel-shaped strip 1 However, a predetermined gap 5 is formed between the groove and the outer peripheral surface of the channel member 2, and the groove 5 extends by a predetermined dimension.

When the underground wall is formed by the underground row wall member formed as described above, as shown in FIG.
The direction of the adjacent underground wall member is reversed, and each end 1a of the adjacent underground wall member is inserted into each of the end gaps 5 of the adjacent underground wall member, thereby forming the end 1a. Each other is engaged. Therefore, the extended other end portion 1a functions as a male joint, and the gap 5 functions as a female joint.

As described above, according to the present embodiment, it is possible to obtain an underground row wall member with a joint which can be easily manufactured without specially processing the joint portion. Further, since two arc-shaped grooved members 1 and 2 having different groove widths are joined with one placed inside the other, the cross-section becomes substantially elliptical in the assembled state, and the first conventional method is used. The cross-sectional efficiency is better than the round steel pipe sheet pile shown as an example.

In the above-mentioned example, the groove-shaped material is shown as having an arc-shaped groove. However, the present invention is not limited to this. In short, two groove-shaped materials having different groove widths are used. By joining both ends of the grooved material having a wide groove width in a state where the concave side of the material is arranged opposite to each other, the both ends of the grooved material are extended outward.
What is necessary is just to be able to make it tubular and to form a joint part at both ends. Further, the groove shape of the channel member may be a combination of straight lines, a combination of curves, or a combination of straight lines and curves. Further, the groove-shaped strips need not have the same shape, but may have different shapes.

Therefore, as another example, as shown in FIG. 3, for example, the groove may be formed in a substantially trapezoidal shape so that the cross-sectional shape of the tube in the assembled state becomes hexagonal. Further, as shown in FIG. 4, the groove may be formed in a long C shape so that the cross-sectional shape of the tube portion in the assembled state is an ellipse. Further, as shown in FIG. 5, the groove may be formed in a substantially rectangular shape so that the cross-sectional shape of the tube in the assembled state is substantially rectangular.

Further, as shown in FIG.
Grooves 1b, 2 recessed from the outside toward the inside at the bottom of the groove
By forming b in the axial direction of the channel members 1 and 2, the width-to-thickness ratio may be reduced to increase the buckling resistance. The number of the concave grooves is not limited to one for each of the channel members 1 and 2, but may be plural.

Further, as shown in FIG.
Ribs 1c, 2c may be formed in the axial direction of the channel members 1, 2 inside the bottom of the groove. By doing so, it is possible to reduce the width-to-thickness ratio and increase the buckling resistance similarly to the case where the concave grooves 1b and 2b are formed. The number of the ribs is not limited to one for each channel member, and may be plural.

The various shapes described above, or the presence or absence of concave grooves or ribs, may be selected from those having low manufacturing costs according to the required section modulus. The channel members 1 and 2 may be manufactured by either rolling or pressing.

Embodiment 2 Underground row walls may be required to be as thin as possible due to restrictions such as installation locations. And in order to keep the section modulus in the same groove shape and make the underground wall as thin as possible,
It is necessary to increase the thickness of the board. However, among sections of the cross section, the contribution to the section modulus is larger at positions farther from the center of the wall and smaller at portions closer to the center. It is preferable to increase the cross section and reduce the cross section of the portion near the center.

Therefore, in this embodiment, as shown in FIG. 8, the thickness of the channel member is changed so that the thick portion is located away from the center during assembly. is there. In FIG. 8, the same or corresponding parts as those in FIG. 1 are denoted by the same reference numerals. FIG. 9 shows a connection state when the underground wall is formed.

In the present embodiment, since the thick portion is located away from the center at the time of assembly, the thickness of the underground row wall member can be reduced, and the thickness of the underground row wall can be reduced. Can be made thinner, and the sectional efficiency can be improved. In addition, the groove | channel material which changed thickness can be processed easily by press-forming a thickness difference steel plate.

In the above example, the groove-shaped strip has a semicircular arc shape. However, the groove shape is not limited to this, and is similar to the first embodiment. As illustrated in FIG. 10 corresponding to that of the first embodiment, as shown in FIG.
FIG. 11 shows a rectangular cross section, and FIG. 11 shows a groove formed in a long C shape so that the cross section in an assembled state is an ellipse.
As shown in (1), there is an example in which the groove is formed in a substantially rectangular shape so that the cross-sectional shape of the tube in the assembled state is substantially rectangular.

Embodiment 3 FIG. 13 is a cross-sectional view of an underground row wall member according to Embodiment 3 of the present invention, and portions that are the same as or correspond to those in FIG. 1 are denoted by the same reference numerals. The underground row wall member according to the third embodiment has a groove-shaped strip 1 having a wide groove width and having a curved section having bent portions 1d and 1d at both ends 1a. A groove-shaped strip 1 having a narrow groove width formed in an arc shape is arranged with its concave sides facing each other, and both end portions 1a, 1a of the groove-shaped strip 1 having a wide groove width are extended outward. Are joined together to form a tube. In addition,
The bent portions 1d, 1d are formed by bending both ends 1a, 1a of the channel-shaped strip 1 into a concave shape in a hook shape.

When forming the underground wall with the underground row wall member formed as described above, as shown in FIG. 14, each bent portion of the adjacent underground row wall member is used. 1d to engage each other.

As described above, according to the present embodiment, an underground row member with a joint can be obtained by extremely simple processing. Also, the bent portions 1d, 1d are bent in a hook shape at the tip end, and by engaging the adjacent bent portions with each other, the engagement is reliably performed and the water channel becomes longer,
Water stoppage increases. In addition, since two arc-shaped grooved members 1 and 2 having different groove widths are joined by disposing one inside the other, the cross-section becomes substantially elliptical in an assembled state, and the first conventional method is used. Similar to the first embodiment, the cross-sectional efficiency is higher than that of the round steel pipe sheet pile shown as an example.

In the above example, the groove-shaped strip has an arc-shaped groove, but the present invention is not limited to this. The combination of straight lines, the combination of curves, the combination of straight lines and curves, and the fact that each groove-shaped strip does not need to be the same shape and may have different shapes, This is similar to the first and second embodiments.

Therefore, as another example, as shown in FIG. 15, for example, the groove may be formed in a substantially trapezoidal shape so that the cross-sectional shape of the tube portion in the assembled state becomes hexagonal.
Alternatively, as shown in FIG. 16, the groove may be formed in a long C shape so that the cross-sectional shape of the tube in the assembled state is an ellipse. Further, as shown in FIG. 17, the groove may be formed in a substantially rectangular shape so that the cross-sectional shape of the tube in the assembled state is substantially rectangular.

Further, as shown in FIG.
A groove 1b recessed from the outside toward the inside at the bottom of the groove 2;
By forming the grooves 2b in the axial direction of the channel members 1 and 2, the width-to-thickness ratio may be reduced to increase the buckling resistance. The number of the concave grooves is not limited to one for each of the channel members 1 and 2, but may be plural.

Further, as shown in FIG.
The ribs 1c, 2c are provided inside the bottom of the groove
May be formed in the axial direction. By doing this,
Similar to the formation of the concave grooves 1b and 2b, the width-to-thickness ratio can be reduced to increase the buckling resistance. The number of the ribs is not limited to one for each channel member, and may be plural.

The various shapes described above, or the presence or absence of grooves or ribs, may be selected from those having low manufacturing costs according to the required section modulus. The channel members 1 and 2 may be manufactured by either rolling or pressing.

Embodiment 4 FIG. In the fourth embodiment, for the same reason as in the second embodiment, as shown in FIG. 20, the thickness of the channel member is changed so that the thick portion comes to a position away from the center during assembly. It was formed as follows. 20, the same parts as those in FIG. 13 showing the third embodiment are denoted by the same reference numerals. FIG. 21 shows a connection state when the underground wall is formed.

In this embodiment, since the thick portion is located away from the center at the time of assembly, the thickness of the underground row wall member can be reduced, and the thickness of the underground row wall can be reduced. Can be made thinner, and the sectional efficiency can be improved. In addition, the groove | channel material which changed thickness can be processed easily by press-forming a thickness difference steel plate.

FIG. 20 shows an example in which the groove shape is an arc-shaped groove. However, the groove shape is not limited to this, and is similar to the third embodiment. For example, as shown in FIG. 22, the groove is formed in a trapezoidal shape so that the cross-sectional shape in the assembled state is a hexagonal cross-section, as shown in FIG. 24, the groove shape is formed in a long C shape so that the cross-sectional shape in the assembled state is an ellipse, or, as shown in FIG. There is one in which the cross-sectional shape is substantially rectangular.

As the shapes of the bent portions 1d and 1d, in the above-described third and fourth embodiments, an example is shown in which both ends of the wide grooved material are bent once only in a hook shape. 25, one end of the channel member may have a curvature as shown in FIG. Also, as shown in FIG. 26, one end of the channel member is bent inwardly plural times,
As shown in FIG. 7, the curvature may be smaller at the tip, or may be formed in a spiral shape. By doing so, the water stoppage at the bent portion can be further increased.

The bent portions in the third and fourth embodiments are examples in which one end of each channel-shaped member is bent to the concave side. However, as shown in FIG. 28, each channel-shaped member is bent. May be bent outward.

[0042]

Since the present invention is configured as described above, it has the following effects.

Two groove members having different groove widths are joined to each other with their concave sides facing each other and both ends of the groove members having a wide groove width are extended outward. Since it is formed in a tubular shape, it is possible to obtain an underground row wall member with a joint that has high sectional efficiency and is easy to manufacture.

Further, since the bent portions are formed at both ends of the wide channel member, the members for the underground row walls can be reliably connected to each other, and the waterproofness can be improved.

Further, since the bent portion is formed in a spiral shape, the waterproofness can be further improved.

Further, since the channel member is formed so that the center portion is formed thicker than both end portions, the wall thickness of the underground wall can be reduced and the sectional efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of Embodiment 1 of the present invention.

FIG. 2 is an explanatory diagram illustrating a use state of the first embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating another embodiment of the first embodiment of the present invention.

FIG. 4 is an explanatory diagram illustrating another embodiment of the first embodiment of the present invention.

FIG. 5 is an explanatory diagram illustrating another embodiment of the first embodiment of the present invention.

FIG. 6 is an explanatory diagram illustrating another embodiment of the first embodiment of the present invention.

FIG. 7 is an explanatory diagram illustrating another embodiment of the first embodiment of the present invention.

FIG. 8 is a cross-sectional view of Embodiment 2 of the present invention.

FIG. 9 is an explanatory diagram illustrating a use state of the second embodiment of the present invention.

FIG. 10 is an explanatory diagram illustrating another embodiment of the second embodiment of the present invention.

FIG. 11 is an explanatory diagram illustrating another embodiment of the second embodiment of the present invention.

FIG. 12 is an explanatory diagram illustrating another embodiment of the second embodiment of the present invention.

FIG. 13 is a sectional view of Embodiment 3 of the present invention.

FIG. 14 is an explanatory diagram illustrating a use state of the third embodiment of the present invention.

FIG. 15 is an explanatory diagram illustrating another embodiment of the third embodiment of the present invention.

FIG. 16 is an explanatory diagram illustrating another embodiment of the third embodiment of the present invention.

FIG. 17 is an explanatory diagram illustrating another embodiment of the third embodiment of the present invention.

FIG. 18 is an explanatory diagram illustrating another embodiment of the third embodiment of the present invention.

FIG. 19 is an explanatory diagram illustrating another embodiment of the third embodiment of the present invention.

FIG. 20 is a sectional view of Embodiment 4 of the present invention.

FIG. 21 is an explanatory diagram illustrating a use state of the fourth embodiment of the present invention.

FIG. 22 is an explanatory diagram illustrating another embodiment of the fourth embodiment of the present invention.

FIG. 23 is an explanatory diagram illustrating another embodiment of the fourth embodiment of the present invention.

FIG. 24 is an explanatory diagram illustrating another embodiment of the fourth embodiment of the present invention.

FIG. 25 is an explanatory diagram illustrating another form of the bent portion according to the third and fourth embodiments of the present invention.

FIG. 26 is an explanatory diagram illustrating another embodiment of the third and fourth embodiments of the present invention.

FIG. 27 is an explanatory diagram illustrating another embodiment of the third and fourth embodiments of the present invention.

FIG. 28 is an explanatory diagram illustrating another embodiment of the third and fourth embodiments of the present invention.

FIG. 29 is a cross-sectional view of a conventional round steel pipe sheet pile.

FIG. 30 is an explanatory view of a state of use of a conventional round steel pipe sheet pile.

FIG. 31 is an explanatory view of another configuration of a bent portion of a conventional round steel pipe sheet pile.

FIG. 32 is an explanatory diagram of another configuration of a bent portion of a conventional round steel pipe sheet pile.

FIG. 33 is an explanatory diagram of another configuration of a bent portion of a conventional round steel pipe sheet pile.

FIG. 34 is an explanatory view of a conventional square steel pipe sheet pile.

FIG. 35 is an explanatory diagram of another conventional example.

FIG. 36 is an explanatory diagram of a problem of the conventional example.

[Explanation of symbols]

 1, 2 Channel material 1a, 1a Both ends 1d, 1d Bent part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Okamoto 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Shigeru Nakagawa 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Sun Inside the Kokan Co., Ltd. (72) Inventor Mitsugu Fuzen 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan Inside the Kokan Co., Ltd. (72) Takahiro Nakajima 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan F Tube (in reference) 2D049 EA02 FB03 FB14 FC03

Claims (4)

[Claims] 1. Two groove-shaped members having different groove widths are arranged with their concave sides facing each other, and both ends of the groove-shaped material having a wide groove width are extended outward. An underground row wall member formed by joining to form a tube. 2. The underground row wall member according to claim 1, wherein bent portions are formed at both ends of the groove member having a large groove width. 3. The underground row wall member according to claim 2, wherein the bent portion is formed in a spiral shape. 4. The groove-shaped strip is thicker at its center than at both ends.
An underground row wall member according to any one of the above.