JPS6358973B2 - - Google Patents

Description

[Detailed Description of the Invention] Steel sheet piles used for land reclamation work, bank protection work, embankment work, etc. are poured and buried with both ends thereof engaged and connected to each other to prevent collapse of earth walls before and after continuous steel sheet piles. It is something to do.

Therefore, in the event of ground displacement due to an earthquake or loosening of the ground due to rainwater, the steel sheet piles will not expand or contract in the lateral direction of the connection, although the steel sheet piles may slide and shear at the mutually engaged portions. Since there is no bending deformation, it may cause disengagement of the steel sheet piles, destructive deformation of the steel sheet piles, or damage to structures connected to the steel sheet piles.
There was a risk that the above-mentioned functions of the steel sheet piles would be impaired.

The present invention relates to a joint for steel sheet piles, and aims to eliminate the above-mentioned fear by using the joint between steel sheet piles.

Furthermore, since the joint of the present invention uses a flexible water-stop member made of rubber, synthetic resin, etc., there is a risk that the flexible water-stop member may crack or be damaged when the joint is installed. This is an attempt to provide a construction method that eliminates fear. The present invention will be explained in detail below with reference to the drawings.

In FIGS. 1 and 2, a joint A is arranged between a large number of connected steel sheet piles B, and is located on both sides of a flexible water stop member 1 made of rubber, synthetic resin, etc. It is composed of a plate-like member 2 having a joining joint part 2-1 with the sheet pile B and a fixing part 2-2 of the flexible water-stopping member 1, and the mounting part 1-1 of the flexible water-stopping member 1 is attached to the plate-like member overlapping the fixing part 2-2, and applying the backing plate 3,
It is fastened with 4 bolts and nuts. That is, the flexible water stop member 1 is provided astride between the plate-like members 2, 2 so as to extend along the opposite ends of the plate-like members 2, 2. However, the shape of the flexible water-stopping member 1 is not limited to the illustrated example, and can maintain water-stopping properties and follow displacement between steel sheet piles, such as a flat plate, a corrugated plate, or a plate-like body with a plurality of hollow parts. It may be of any kind as long as it can be fixed, as long as it can maintain water stoppage. The plate-like member 2 is not limited to the one shown in the drawings; for example, if it is sufficient for the joint to follow only the bending deformation, the lower ends of a pair of plate-like members may be integrally joined by a horizontal member. Variations are possible. As mentioned above, in the joint of the present invention, since the flexible water-stopping member is provided between the steel sheet piles, the steel sheet piles expand, contract, and bend to closely follow the displacement of the steel sheet piles due to ground movement, etc. There is no fear of cracking or damage caused by ground movement, etc., and the steel sheet piles can fully perform their functions, and have the advantage of improved durability.

Next, the joint A of the present invention is shown in FIGS. 3 to 7.
We will explain the construction of

In the construction of joint A, the upper end of joint A is pressed and buried using a vibratory pile driver (vibrohammer).
There is a risk of cracking or damage to the joint A.
A steel leading rigid body 5 with a pointed tip is attached to the lower end of the body to safely guide the pushing and burying of the synthetic resin A into the soil.
Attach. In installing the leading rigid body 5,
A vertically long open groove 5b is provided in the center of the side wall 5a, and the fixing part 2-2 of the joint A is inserted into the groove 5b and temporarily fixed by spot welding. As for the degree of temporary fixation, it is desirable that the fixation of the leading rigid body 5 is released when the steel sheet pile is displaced after the joint A is pushed in and embedded. With or without temporary fixing, wires 6 are attached to the front and rear walls 5c and 5d of the leading rigid body, and the wires 6 are suspended at the upper end of the joint A, so that the leading rigid body 5 does not come off when the joint A is pushed in and buried.

The shape of the leading rigid body 5 is not limited to that shown in FIG. 3, but may be any shape as shown in FIG. 4 as long as it facilitates the insertion of the joint A and prevents damage to the flexible water stop member 1.

In addition, the leading rigid body with a pointed tip has a greater pushing effect during push-in embedding, but the leading rigid body is not limited to this, and may be flat as shown in FIG. 4, 5-2.

In FIG. 5, protective iron plates 7, 7 are provided on the front and rear surfaces of the joint A to further reduce damage to the flexible water stop member 1 during push-in construction. Leading rigid body 5-4
are open longitudinal grooves 5-4a, 5-4 so that the fixed part 2-2 of the joint A and the protective iron plates 7, 7 can be engaged with each other.
b, 5-4c are provided. 5-4d is a lifting wire attachment hole.

Figure 6 shows other protective iron plates 7- on the front and rear surfaces of joint A.
1 and 7-1 are used.
The leading rigid body 5-5 is provided with a rectangular opening cutout 5-5b in the side wall 5-5a.

The protruding plates 8, 8, 8, 8 protruding from both sides of the fixed portion 2-2 of the joint A are engaged with this cutout 5-5b to join the joint A and the leading rigid body 5-5. The protective iron plates 7-1, 7-1 are inserted into the cavities 9, 9 created by joining the leading rigid body and the joint A. 5-5c is a lifting wire attachment hole.

FIG. 7 shows the state in which the upper end of the joint A is fixed before being pushed in and buried. As mentioned above, the upper end of the joint A is pressed and buried by applying a load with a vibrohammer or the like, but since a very large load is applied to the upper end of the joint A, the upper end is placed with the iron plate 10. It is installed across the fixed part 2-2 of the joint A and fixed by welding. Alternatively, the iron plate 10 may or may not be fixed by welding, and the lid member 11 may be placed between the fixed portions 2-2 from above. The lid member 11 has a long groove 11b between the legs 11a, 11a which protrude parallel to the lower surface thereof, and the fixing part 2-2 of the joint A is inserted into the long groove 11b and fixed by welding. After the joint A is pressed and embedded, the upper end of the joint A is cut along the broken line 12. Note that the lid material 11 is not limited to the illustrated example, and the upper end of the joint A may be deformed, damaged, or
Any material that can protect or maintain the upper end of the joint A to prevent breakage etc. is sufficient.
Of course, the fixation is not limited to welding, and other fixing means such as bolting or riveting may also be used. In addition, an example was shown in which the upper end of the joint A is cut off after the joint A is pushed into the ground. There is no need for cutting if the lid member 11 can be easily attached and detached, such as by bolting.

That is, any material may be used as long as it can release the fixation of the upper end of the joint A after the joint A has been pushed and buried, and can exhibit the function of following the displacement of the joint A, such as expansion/contraction, bending, shearing, etc.

In the figure, reference numeral 11c is a protruding plate for clamping the vibration type driving machine.

FIG. 8 shows another embodiment of the joint A of the present invention, in which a protective iron plate 7-2 is fixed to a part 2-3 of the fixed part 2-2 of the plate member 2 by welding or the like, and other The part 2-4 and the protective iron plate 7-2 are slidably abutted against each other, and the corrugated flexible water stop member 1 is arranged and fixed across the central parts 2-5 and 2-5.

The flexible water stop member 1 has protective iron plates 7-2 facing each other,
7-2 and the fixing parts 2-2 and 2-2 facing each other in a box-shaped space. This prevents dirt from entering the box-shaped space and prevents the flexible water-stopping member 1 from being damaged or damaged.

As mentioned above, the joint of the present invention is a joint for steel sheet piles in which a flexible water-stopping member made of rubber, synthetic resin, etc. is straddled between plate-shaped parts having joint joints with adjacent steel sheet piles, During push-burying construction, a leading rigid body is joined to the lower end of the joint, and then a load is applied from the upper end using a vibrating pile driver, etc., and the joint is pushed into the joint.

In order to further prevent damage to the flexible water stop member during construction, protective iron plates are placed on the front and rear surfaces of the joint, and the leading rigid body is joined and cast.

Therefore, the joint deforms by closely following the displacement of the steel sheet pile due to ground movement, etc., so the steel sheet pile does not crack or get damaged, and its durable life can be maintained for a long time.
Moreover, since the joint maintains its water-stopping properties even when the flexible water-stopping member is deformed, it is possible to prevent the earth walls in front and behind the steel sheet piles from collapsing due to the flow of water.

In addition, during construction, the leading rigid body is joined to the lower end of the joint, and a protective iron plate is provided if necessary, so there is no damage to the flexible water-stopping member, and the leading rigid body does not push the joint A. Since it guides the burying process, it can be easily pushed and buried.

Since the upper end of the joint is also fixed with an iron plate or a cover material, etc., and then the joint is pushed and buried, cracking and damage to the flexible water stop member can be prevented.

Although the above embodiments and modified examples are for cases in which the joint according to the present invention is used as a joint for U-shaped steel sheet piles, the present invention is not limited to joints for U-shaped steel sheet piles, and can be applied to straight type, Z-shaped It can also be used as a joint for other types of steel sheet piles, such as steel pipe sheet piles.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a steel sheet pile equipped with the joint of the present invention, partially pushed into the soil, Fig. 2 is a cross-sectional view taken from Fig. 1, and Fig. 3 shows the joint of the present invention. FIG. 4 is a perspective view showing another embodiment of the leading rigid body according to the present invention, and FIG. 5 is a perspective view showing a state in which the leading rigid body is joined to the leading rigid body. FIG. FIG. 6 is a perspective view showing the state of connection with the leading rigid body, FIG. 6 is a perspective view showing another example of the state of connection with the leading rigid body when protective steel plates are provided on both sides of the joint of the present invention, and FIG. A perspective view showing the fixed state of the upper end portion of the joint of the present invention before being pushed and embedded, No. 8
The figure is a sectional view showing another embodiment of the joint of the present invention. A...Joint, B...Steel sheet pile, 1...Flexible water stop member, 2...Plate member, 2-1...Joint joint part, 2
-2... Fixed part, 3... Plate, 5... Leading rigid body,
7...Protection iron plate, 11...Lid material.

Claims (1)

[Scope of Claims] 1. A flexible water-stopping member made of rubber, synthetic resin, etc. is provided between plate-shaped parts having joints with adjacent steel sheet piles so as to extend along opposite ends of the plate-shaped parts. A joint for steel sheet piles, characterized in that it is straddled. 2. A flexible water-stopping member made of rubber, synthetic resin, etc. is installed so as to extend along the opposite ends of the plate-like parts between the plate-like parts having joints with adjacent steel sheet piles, and A steel sheet pile joint characterized by having protective iron plates arranged on its front and rear surfaces. 3. A flexible water-stopping member made of rubber, synthetic resin, etc. is installed between the plate-shaped parts having joints with adjacent steel sheet piles so as to extend along the opposite ends of the plate-shaped parts. A construction method for a steel sheet pile joint, which is characterized by joining a leading rigid body to the lower end of the steel sheet pile joint, applying a load to the upper end, and pushing the joint into the soil. 4. A flexible water-stopping member made of rubber, synthetic resin, etc. is installed so as to extend along the opposite ends of the plate-shaped parts between the plate-shaped parts having joints with adjacent steel sheet piles. A steel sheet pile is characterized in that protective iron plates are arranged on the front and rear surfaces of a joint of the steel sheet pile, a leading rigid body is joined to the lower end of the joint, and the steel sheet pile is pushed into the soil by applying a load to the upper end. Fittings.