JPH0354174Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a steel sheet pile joint used in the civil engineering and construction fields.

(Prior art) In the civil engineering and construction fields, many types of steel sheet piles are used for earth retaining, foundations, continuous underground walls, and harbor quay walls, and these steel sheet piles have various joints depending on the purpose. has been adopted. For example, Japanese Patent Laid-Open No. 55-49424 discloses a construction method in which a joint consisting of a connecting member and a guide pipe is attached to a steel pipe sheet pile (pile), and the steel pipe sheet pile is connected to construct a column wall.

Figure 7 shows a general engagement situation of this steel pipe sheet pile. As shown in the schematic plan view of FIG. 7, a tubular claw joint 45 is formed of a round steel pipe 44 having a plate-like web 42 along the longitudinal axis of the outer surface of the circular steel pipes 41a, 41b and an open groove 43 extending in the longitudinal direction. , plate-like web 4
A tubular ball joint 48 consisting of a circular steel pipe 47 and a circular steel pipe 47 is coated with a solution 49a, 49b on the outer surface of the circular steel pipe, respectively.
The steel pipe sheet pile 40 is widely used because of its good engagement and excellent watertightness.

After the steel pipe sheet pile 40 is erected, mortar is injected from the circular steel pipes 47 to densely fill the circular steel pipes 47 and the space between the circular steel pipes 47 and the round steel pipes 44, thereby ensuring firm engagement between the joints. In this case, there is an advantage that there is no need to use a separate mortar injection pipe unlike other types of joints.

(Problems to be Solved by the Invention) Although the steel sheet pile 40 has the above-mentioned advantages, it has the problem of high cost due to the large number of welded parts, and the problem that the plate web 4 is used in the tubular ball joint 48.
Welding 49c between 6 and the circular steel pipe 47 is relatively difficult, and the heat effect caused by welding is large, which tends to be a weak point in terms of strength, and the manufacturing process takes a relatively long time.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the inventors of the present invention have developed a female joint having a tubular claw joint with an open groove in the vertical axis direction, and an inner hole of the tubular claw joint. A steel sheet pile joint comprising a male joint having a freely insertable tubular ball joint, wherein the male joint comprises a vertical half-section of straight steel sheet piles having a tubular ball joint with a mating portion formed into a tubular shape. was developed and succeeded in solving the above problems.

(Function) The male joint of the present invention uses a rolled plate-like body having an engaging portion at one end, that is, a half-cut straight steel sheet pile 12 shown in FIG. The heat affected zone due to welding is small, the strength is high, and the inner hole formed by the meshing part can be used as a mortar injection hole.

Of course, if it is used underground and there is no water or the water is so small that it is not a problem, it is possible to inject mortar even if the engaging part is not closed like a tube. However, when injecting mortar in seawater or underwater, the engaging part If it is open, not only will the mortar flow out, but the mortar components will change and deteriorate.

The tubular ball joint of the male joint according to the present invention can be manufactured by compressing the engaging part with a press or the like to close the tip of the claw of the engaging part, or by closing the tip of the claw of the engaging part with an amorphous material or a plate-shaped body. Since it is formed into a tubular shape, it can be filled with mortar smoothly and exhibits sufficient water-stopping properties.

(Example) An example of the present invention will be described in detail using the drawings. FIG. 1 is a plan view showing one embodiment of the joint of the present invention. A female joint 5a equipped with a tubular claw joint 5 having an opening 3 is attached to the circular steel pipe 1a, and a straight steel pipe 1b is equipped with a tubular ball joint 18 having a mating part 17 formed in a tubular shape at the tip. A male joint 18a consisting of a vertical half-cut body of a sheet pile is attached, and the circular steel pipe 1a,
Connect 1b.

As a male joint having a tubular ball joint 18, a vertical half-section of a rolled straight steel sheet pile as shown in FIG. 2 is used, the engaging part 17 at the tip is machined, and the inner hole 16 is used as a mortar injection pipe.

FIG. 2 is a schematic plan view of a linear steel sheet pile 12 manufactured by rolling means, in which the linear steel sheet pile 12 is cut longitudinally at an appropriate position on the web to form a half-cut body, and then the claw portion 14 and ball portion 15 were pressed together using a press until they came into contact with each other. In the present invention, the combination of the claw portion 14 and the ball portion 15 is collectively referred to as an engaging portion. Further, the tips of the claw portion 14 and the ball portion 15 are referred to as the tip of the claw portion. Half-cut sections of the parts thus obtained are shown in FIGS. 3a and 3b. When the engaging portion 17a is relatively small as in the tubular ball joint 18a in FIG. 3a, the claw portion 14a and the tip of the claw portion of the ball portion 15a can be brought into contact with each other, but the tubular ball joint in FIG. 3b 18
If the engaging portion 17b is large as shown in b, and there is a risk that the engaging portion 17b may open due to springback even if compressed, the tip of the claw portion of the ball portion 15b may be brought into contact with the slightly inside of the claw portion 14b. .

By doing this, the claw part 14 and the ball part 1
A tubular ball-and-socket joint 18 is formed with a mating portion 17 consisting of an inner hole 16 and an inner hole 16 . Note that the length and thickness of the plate-like webs 6a and 6b are determined as appropriate depending on the application.

Next, an example will be shown in which the tip of the claw part of the engaging part of a tubular ball joint is closed with another material. Although FIG. 4a shows an example in which the tip of the claw part of the engaging part 17 is closed with resin 19, it may be closed with an amorphous material such as a weld bead or putty.

Although FIG. 4b shows an example in which the tip of the claw portion of the engaging portion 17 is closed with a steel plate 20, it may be closed with a plate-like body such as a plate or cloth containing synthetic fibers.

Now, it is disadvantageous to provide new rolls for steel sheet pile joints unless the lots are consolidated to some extent, and it is economically advantageous to process straight steel sheet piles 12 as shown in FIG.

Note that the circular steel pipe shown in FIG. 1 may be freely selected to have a rectangular or trapezoidal shape depending on the purpose, for example, depending on the required joint strength.

Next, we will discuss the strength test results of the steel sheet pile joint according to the present invention. Diameter 101.6mm, thickness 20mm, length
300mm carbon steel pipe for mechanical structure (JIS G3445−
STKM13A) and a rolled plate material (web) with a thickness of 10 mm are used to fabricate the female joint, and the male joint is made of a half-cut plate of straight steel sheet pile equivalent to JISA5528, SY30 (web plate thickness 9.5 mm). A tubular ball joint was formed using a maximum width of 71 mm and a length of 300 mm for the claw and ball portions, and both the female and male joints were engaged, filled with mortar, and then subjected to a tensile test.

The elongation of the joint obtained at that time is shown in the graph of FIG. Figure 5 shows the elongation (elongation of the joint in the tensile direction, unit %) on the horizontal axis and the tensile load (ton) on the vertical axis.
It was taken from The results are shown after first applying a load of 15 tons and unloading, then applying a load of 30 tons and unloading, and finally applying a load of 50 tons and unloading.
Even in the results of a normal tensile test using repeated loading and unloading, no initial loosening was observed, and as is clear from Figure 5, the elongation under a maximum load of 50 tons was less than 0.9%, and no breakage was observed. It was confirmed that the steel sheet pile joint according to the present invention has high strength, high reliability, and high practical effectiveness.

Next, FIGS. 6a to 6c show an outline of the construction of a continuous underground wall employing the steel sheet pile joint according to the present invention.

Fig. 6a shows an example in which square steel sheet piles 33a and 33b are engaged with steel sheet pile joints 10a and 10b according to the present invention, and Fig. 6b shows an example in which steel pipe sheet piles 34a and 34b are similarly engaged with steel sheet pile joints 10c and 10d. An example of this is shown in Fig. 6c, which is an H formed by welding female joints 5a to 5d to an H section steel.
Shaped steel sheet piles 35a, 35b and male joints 18c to 18f
This is an example showing a situation in which a reinforcing bar cage 36 is engaged, and in both cases, the joint strength was sufficient and economical construction was possible.

(Effects of the invention) The steel sheet pile joint of the present invention is 10 to 30% lower in price than well-known steel sheet pile joints, has excellent mechanical properties such as bending and tension, and is easy to inject with mortar and has a high stopping power. In addition to being water-based, the manufacturing period is short,
It also has great economic effects, such as being able to be supplied in large quantities.

[Brief explanation of the drawing]

Figure 1 is a diagram showing one embodiment of the steel sheet pile joint according to the present invention, Figure 2 is a diagram showing a straight steel sheet pile used in a male joint, and Figures 3a and 3b are the claws and balls of the meshing part. Figures 4a and 4b are diagrams showing an example in which the tips of the claws of the mating part of the male joint are covered with another material, and Figure 5 is a graph showing the results of a tensile test of the joint. ,
6a, b, and c are diagrams illustrating an engagement situation using the steel sheet pile joint according to the present invention, and FIG. 7 is a diagram illustrating an engagement situation using a conventional steel sheet pile joint. 1a, 1b...Circular steel pipe, 3...Open groove, 5...
Tubular claw joint, 5a to 5d... Female joint, 6... Plate web, 6a, 6b... Plate web, 10a to 1
0d...Joint, 12...Straight steel sheet pile, 14...
Claw portion, 14a, 14b...Claw portion, 15...Ball portion,
15a, 15b...Ball part, 16...Inner hole, 17...
...Meshing part, 18... Tubular ball joint, 18a... Male joint, 19... Resin, 20... Steel plate, 33a, 33
b... Square steel pipe sheet pile, 34a, 34b... Steel pipe sheet pile, 35a, 35b... H-shaped steel sheet pile, 36... Rebar cage.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a female joint having a tubular claw joint with an open groove in the longitudinal axis direction, and a male joint having a tubular ball joint that can be freely inserted into the inner hole of the tubular claw joint. A steel sheet pile joint, characterized in that the male joint is made of a vertical half-section of a straight steel sheet pile and has a tubular ball joint in which an engaging portion is formed into a tubular shape. (2) Utility model registration claim No. 1 in which the tips of the claws of the male joint meshing portion abut and are formed into a tubular ball joint.
Steel sheet pile joints as described in section. (3) The steel sheet pile joint according to claim 1, wherein the tip of the claw part of the male joint meshing part is closed with an irregularly shaped material to form a tubular ball joint. (4) The steel sheet pile joint according to claim 1, wherein the tip of the claw part of the male joint meshing part is closed with a plate-like member to form a tubular ball and socket joint.