JPH08209683A - Steel pipe sheet pile having outside surface projection - Google Patents

Abstract

PURPOSE: To prevent generation of a clearance between a joint member and a steel pipe, and secure a water stopping function as a steel pipe sheet pile wall by fixing the joint member to a steel plate bent in the same curvature with an outside diameter of the steel pipe, and fixing it to the steel pipe through a deformable filler. CONSTITUTION: A joint member 2 is fixed to a steel plate 3 bent in the same curvature with an outside diameter of a steel pipe 1 having an outside surface projection 5. Since a steel plate 3 is fixed to the steel pipe 1 through a deformable filler 4, even if the projection 5 exists, a clearance is not generated between the joint member 2 and the steel pipe 1, and a water stopping function as a steel pipe sheet pile wall is secured. A water swelling material is used as the deformable filler 4. The joint member 2 is fixed by bolts 12 penetrating through the steel plate 3, the filler 4 and the steel pipe 1. The projection 5 on an outside surface of the steel pipe 1 prevents dislocation between a steel pipe earth retaining wall and a reinforced concrete wall.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a steel pipe sheet pile with an outer surface projection, which is used when a steel pipe sheet pile wall is used as both a temporary earth retaining wall and a main body wall in an open-cut tunnel, a sewage treatment plant, etc. It is a thing.

[0002]

2. Description of the Related Art When using a steel pipe sheet pile wall as both a temporary earth retaining wall and a main body wall in the construction of open-cut tunnels, sewage treatment plants, etc., simplification of work for fixing slippage prevention such as headed studs If desired, as shown in FIGS. 9 to 11, the steel pipe sheet pile 15 having the joint member 18 on the outer surface of the steel pipe 16 is used as a steel pipe sheet pile wall (hereinafter referred to as steel earth retaining wall 19). 15 and a reinforced concrete wall 20 that is placed after earth and sand excavation are combined and used as a composite wall (this was filed by the applicant as Japanese Patent Application No. 6-127077, It is open).

To further explain the technique of FIGS. 9 to 11,
As described above, the synthetic earth retaining wall is configured by the steel earth retaining wall 19 made of the steel pipe sheet pile wall and the reinforced concrete wall 20, and in the case of FIG. 11, after excavating the earth and sand,
On the surface of the steel pipe sheet pile 15 at the contact surface between the planned construction portion of the reinforced concrete wall 20 and the steel earth retaining wall 19, a shift preventing member 21 including a plurality of headed studs is arranged, and FIG.
In the case of FIG. 10, a plurality of shear reinforcing reinforcements 22 that also extend in the horizontal direction are arranged in addition to the displacement prevention member 21, and the displacement prevention members 3 and the shear reinforcement reinforcements 22 that also function as displacement prevention are made of steel. Each steel pipe sheet pile 1 in earth retaining wall 19
5 is fixed by stud welding.

At the same time, a separator for supporting the mold (not shown)
Is fixed to the steel pipe sheet pile 15 by welding, and the distribution force on the steel earth retaining wall 19 side is extended in the direction perpendicular to the axis of the steel earth retaining wall 19 and in the wall normal direction, that is, the width direction of the steel earth retaining wall 19. After arranging the muscles 23 and the wall-side force distribution muscles 24, placing the respective force distribution muscles 23, 24 on the shear reinforcing muscles 22 that also function as slip stoppers, and binding them with a numbered wire, etc. Muscle 23,2
The main reinforcement 24 of the reinforced concrete wall 20 is assembled using 4 as an assembly reinforcement. Finally, the mold 26 is assembled, the concrete 5 is cast, and the curing is sequentially performed by the mold supporting separator that is fixed in advance, and then the mold 26 is removed.

As described above, when the steel sheet pile is a composite earth retaining wall structure that also serves as a temporary earth retaining wall and a main body wall, compared to the structure in which the steel retaining wall made of steel was used only as a temporary earth retaining wall, There are advantages that the construction is simplified, the construction cost is cheaper, and the construction period is shortened.

As a result of further research on the above-mentioned steel sheet sheet pile, the synthetic earth retaining wall structure which also serves as a temporary earth retaining wall and a main body wall, the present inventors have noticed the following improvements.

[Problems to be Solved by the Invention]

That is, in the steel pipe sheet pile used for the composite wall, the steel earth retaining wall 19 and the reinforced concrete wall 20 are used.
Since it is necessary to dispose a large number of shift preventing members 21 on the surface of the steel pipe sheet pile 15 so that and act in an integrated manner, the construction cost becomes high. Further, since a large number of long reinforcing bar studs and short length studs with a head are mixedly used for the slip prevention, the slip prevention fixing work in the underground becomes complicated.

It is an object of the present invention to provide a steel pipe sheet pile with an outer surface projection that solves the above-mentioned drawbacks.

[0009]

In order to achieve the above object, in a steel pipe sheet pile with an outer surface projection according to the present invention, a joint member 2 is fixed to a steel plate 3 which is bent with the same radius of curvature as the outer diameter of a steel pipe 1, It is characterized in that the steel plate 3 is fixed to the steel pipe 1 having a protrusion 5 on the outer peripheral surface through a deformable filler 4. The deformable filler 4 may be made of a water-swellable material. The steel pipe 1, the filler 4, and the bolt 12 penetrating the steel pipe 1 are used to connect the joint member 2 to the steel pipe 1.
It should be fixed to.

[0010]

Since the steel pipe sheet pile according to the present invention has a structure in which the projection 5 is provided on the outer surface of the steel pipe 1, the axial shearing force of the steel pipe sheet pile acting on the boundary surface between the steel pipe sheet pile and the reinforced concrete is the projection 5 and the steel pipe 1. In addition to being sufficiently transmitted through the joint, the protrusion 5 is originally present, so that a gap is created between the joint member 2 and the outer peripheral surface of the steel pipe 1. However, in the present invention, the gap is Due to the presence of the filler 4 for fixing the joint member 2 to the steel pipe 1 with the outer surface projection, no gap is generated between the joint member 2 and the steel pipe 1, and sufficient water shutoff at that portion is ensured.

[0011]

Embodiments of the present invention will now be described with reference to the drawings. In FIG. 1 and FIG. 2, as a steel pipe forming the sheet pile,
A steel pipe 1 with a projection having a projection 5 on the outer peripheral surface is used.
The steel pipe 1 is preliminarily formed with a bolt through hole 6 for fixing the joint member 2 at a predetermined position.

As the joint member 2, in the illustrated example, a steel plate is made of UO.
By processing, the steel pipe 2a having the slit 7 in the longitudinal direction is used. A steel plate 3 is fixed to the joint member 2 by welding 8, and the steel plate 3 is bent with a diameter equal to the outer diameter of the steel pipe 1. The length of the bent steel plate 3 in the axial direction is the same as that of the joint member 2. A bolt through hole 9 for fixing the steel plate 3 to the steel pipe 1 is opened at a predetermined position (see Fig. 4). Next, the bent steel plate 3 is fixed to the joint member 2 by fillet welding. Then, the deformable filler 4 is fixed to the inner surface of the bent steel plate 3 by using an adhesive or the like. In addition, prior to the above-mentioned bonding work, the bolt through hole 10 is opened in the filler 4 (see FIG. 4). The filling material 4 may be made of a material such as rubber that can be deformed by the tightening force of a fastener such as a bolt and can fill the gap. In particular, if you want to ensure waterproofness, use a water-swellable material such as a water-swellable rubber (a special modified rubber system consisting of a combination of natural rubber and water-swellable urethane) that expands when exposed to water. May be.

As shown in FIGS. 3 and 4, the steel pipe sheet pile joint 11 produced as described above is attached to the steel pipe 1 with the outer surface projections by using bolts 12 and nuts 13 in a factory or near a construction site. Fixed by. The bolts may be ordinary bolts that can be tightened using nuts, or may be one-way bolts that allow tightening work from the outside of the steel pipe 1 when judged from the ease of work. (However, illustration is omitted).

Next, FIG. 5 shows an example in which the steel pipe sheet pile joint 11 is constructed by combining the joint member 2 using the equilateral angle steel 2b and the joint member 2 using the cut T steel 2c. . Further, FIG. 6 shows a combined joint of the steel pipe with slit 2a and the cut T steel 2c. In addition, also in the steel pipe sheet pile joint 11 other than these, the steel pipe 1
It can be fixed to and configured. Further, the steel pipe 1 with an outer surface projection may have a projection 5 only on the outer surface, or may have a projection 5 on both inner and outer surfaces (however, not shown).

FIGS. 7 and 8 are a longitudinal sectional view and a lateral sectional view, respectively, of a synthetic earth retaining wall structure using the steel pipe sheet pile with external projections shown in FIGS. 7 and 8 correspond to the longitudinal sectional view and the lateral sectional view of the synthetic earth retaining wall structure shown in FIGS. 9 and 10, and the same reference numerals are given to the same elements as those in FIGS. 9 and 10. Has been done. That is, the synthetic earth retaining wall according to this application example is composed of the steel earth retaining wall 19 and the reinforced concrete wall 20 as in FIGS. 9 and 10. On the surface of the steel pipe sheet pile that is in contact with the reinforced concrete wall 20, a plurality of shear reinforcing bars 22 that also serve as a stopper for the reinforced concrete 27 are fixed by stud welding after excavating the earth and sand. Since the shear reinforcing bar 22 can sufficiently function against the peeling force generated at the boundary surface between the steel earth retaining wall 19 and the reinforced concrete wall 20 when the shift preventing force is applied, the protrusion 5 of the steel pipe 1 and the shear reinforcing bar 22 have a shift preventing force of steel. A steel pipe sheet pile axial shearing force acting on the boundary surface between the earth retaining wall 19 and the reinforced concrete wall 20 can be sufficiently transmitted. In addition, in this embodiment, since the protrusion 5 acts as a shift preventing member, the shift preventing member composed of the headed stud used in FIGS. 9 and 10 is omitted.

[0016]

The present invention has the following effects. First
In addition, since the projection 5 is provided on the outer surface of the steel pipe 1, the axial shear force of the steel pipe sheet pile acting on the boundary surface between the steel earth retaining wall 19 and the reinforced concrete wall 20 is sufficiently transmitted. Therefore, the slip prevention member on the surface of the steel pipe sheet pile, which is necessary for synthesizing the steel pipe earth retaining wall 19 and the reinforced concrete wall 20, is omitted,
Or, since the number of them can be significantly reduced, not only the construction cost can be reduced, but also the work for fixing the slip stopper in the underground becomes simple.

Secondly, since the joint member 2 of the steel pipe sheet pile is fixed to the steel pipe 1 with the outer surface projection through the deformable filler 4, there is no gap between the joint member 2 and the steel pipe 1. ,
Therefore, the water blocking function required for the steel pipe sheet pile wall can be sufficiently ensured.

Thirdly, in the case of manufacturing a steel pipe sheet pile with an outer surface protrusion, the outer surface protrusion of the joint member 2 mounting portion of the steel pipe 1 is cut with a grinder or the like to make it flat, and then according to the conventional method for manufacturing a steel pipe sheet pile. A method of attaching the joint member 2 by welding is conceivable. However, in this method, since the projection cutting work by a grinder is usually carried out manually, the steel pipe sheet pile manufacturing cost becomes high. In this respect, in the present invention, the joint member 2 of the steel pipe sheet pile is used.
Is fixed to the steel pipe 1 via the deformable filling material 4, it is not necessary to cut off the outer surface protrusion 5 at the attachment position of the joint member 2, and therefore, the steel pipe sheet pile with the outer surface protrusion can be manufactured at low cost.

Fourthly, since the steel pipe sheet pile joint can be mounted in a yard near the construction site, the steel pipe alone can be transported before the joint member 2 is mounted, whereby the steel pipe 1 and the joint member 2 can be mounted on a truck or the like. Since it is possible to separately load and reduce wasteful voids and improve transportation efficiency, the transportation cost can be reduced accordingly. Further, when the water-swellable rubber is used as the filler, only the joint member 2 needs to be stored so as not to be wet with water, so that the on-site storage work and management of the steel pipe sheet pile can be simplified.

[Brief description of drawings]

FIG. 1 is a front view showing a steel pipe with an outer surface projection and a joint member of a steel pipe sheet pile according to an embodiment of the present invention separately.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged view showing a mounting relationship between a steel pipe with an outer surface projection and a joint member.

FIG. 4 is an enlarged cross-sectional view of a mounting portion between a steel pipe having an outer surface protrusion and a joint member.

FIG. 5 is a cross-sectional view of a steel pipe sheet pile according to another embodiment.

FIG. 6 is a cross-sectional view of a steel pipe sheet pile according to still another embodiment.

FIG. 7 is a vertical cross-sectional view of a steel earth retaining wall constructed with the steel pipe sheet pile of the present invention.

8 is a cross-sectional view of FIG.

FIG. 9 is a vertical cross-sectional view of an example of a steel earth retaining wall constructed with a conventional steel pipe sheet pile.

10 is a cross-sectional view of FIG.

FIG. 11 is a cross-sectional view of another example of a conventional steel earth retaining wall.

[Explanation of symbols]

 1 Steel Pipe 2 Joint Member 3 Steel Plate 4 Filler 5 Protrusion 6 Bolt Through Hole 7 Slit 8 Welding 9 Bolt Through Hole 10 Bolt Through Hole 11 Steel Pipe Sheet Pile Joint 12 Bolt 13 Nut 15 Steel Pipe Sheet Pile 17 Steel Pipe 18 Joint Member 19 Steel Earth retaining wall 20 Reinforced concrete wall 21 Anti-slip member 22 Anti-shear shear reinforcement bar 23 Distribution bar 24 Distribution bar 25 Main bar 26 Formwork 27 Concrete

Claims (3)

[Claims] 1. A joint member (2) is fixed to a steel plate (3) bent with the same radius of curvature as the outer diameter of a steel pipe (1), and the steel plate (3) has a protrusion (5) on its outer peripheral surface through a deformable filler (4). A steel pipe sheet pile with an outer surface projection, which is fixed to the steel pipe 1. 2. The steel pipe sheet pile with an external projection according to claim 1, wherein the deformable filler 4 is a water-swellable material. 3. The steel pipe sheet pile with an outer surface projection according to claim 1, wherein the joint member 2 is fixed to the steel pipe 1, the filler 4, and a bolt 12 penetrating the steel pipe 1 to the steel pipe 1. .