JPS6022100Y2 - concrete sheet pile - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a concrete sheet pile equipped with a connecting fitting at the connecting portion.

Conventionally, connecting metal fittings were provided at the joints of concrete sheet piles. ■ The connecting metal fittings were directly engaged with each other to connect the sheet piles, and ■ Filling materials such as asphalt and styrofoam were inserted between the connecting metal fittings and the concrete. Various ideas have been devised, such as one in which a water stop plate made of synthetic rubber or the like is installed in a recess formed on the connecting end face of concrete, and the water stop plate is pressed against the connecting fitting of the other party to be joined. ing.

However, among the conventional methods mentioned above, the method (■) is a metal-to-metal connection, so the connection can be made reliably, but there is a problem in terms of watertightness, and the method (■) has problems in terms of productivity and workability. In addition, although the type (■) can maintain watertightness, it has various drawbacks such as low structural strength and reliable connection cannot be expected.

The present invention aims to provide a concrete sheet pile that eliminates the above-mentioned drawbacks of the conventional concrete sheet pile by connecting the connecting fittings by meshing with each other and achieving watertightness by the backing and the density of the connecting fittings due to the elasticity of the backing. That is.

The present invention will be explained in detail below with reference to embodiments shown in the drawings.

In the figure, 1 is a sheet pile main body made of concrete such as reinforced concrete or PC concrete, 2 and 3 are connection end faces of the sheet pile main body 1, and 2 and 3 are corner parts at opposite positions, that is, diagonal lines. Both upper corner portions are removed to form stepped portions 2A, 3A and protrusions 2B, 3B along the longitudinal direction of the sheet pile body 1.
It is desirable that the width of the protrusions is three times the width of the protrusions 2B and 3B.

Then, connecting fittings 4 and 5 made of L-shaped steel are provided to protrude along the longitudinal direction from the stepped surface portions 2A and 3A, respectively.
The mounting position of the connecting fittings 4, 5, that is, the vertical parts 4A, 5
The width from the outer surface of A to the corner of each step surface portion 2A, 3A is slightly larger than the width of the protrusion portions 2B, 3B, respectively.

In addition, the horizontal parts 4B and 5B of the connecting fittings 4 and 5 are respectively protruding parts 2B.
, 3B are bent toward the ridges 2B, 3B without protruding outward from the joining surfaces 2B', 3B', but at this time, each of the horizontal parts 4B, 5B and the step surface part 2A, 3
The distance between the space parts 6 and 7 formed between the horizontal part 4 and the horizontal part 4 is
B or 5B and the water-stop backing 8 to be described later. 2B,
3B is designed to be slightly larger than the wall thickness of the vertical portions 4A and 5A.

In other words, the connecting fittings 4 and 5 protruding from the left and right step surfaces 2A and 3A are configured to be able to engage with each other.

Reference numeral 8 denotes a string-like waterproof backing made of an elastic material, which has a semicircular cross-section and is fixed to the center of the outer surface of the horizontal portion 5B of the connecting fitting 5.

The lower end portion 8a has a tapered shape 8a to facilitate insertion into the space 6 when the connecting fitting 4.5 is engaged, as will be described later.

Although the illustrated water-stop backing 8 is fixed only to the horizontal portion 5B of one of the connecting fittings 5, it may of course be fixed to the center of the outer surface of the other horizontal portion 5B.

Reference numeral 9 denotes a tip end portion of the sheet pile body 1 shaped like a superelevation.

Therefore, the sheet pile bodies 1 having the above-mentioned structure are sequentially driven into the soil in the direction of the arrow Y, as shown in FIG. 5, but the connecting fittings 4 and 5 of the adjacent sheet pile bodies 1, The horizontal portion 5B of one of the connecting fittings 5 is inserted into the space 6 of the other, and the horizontal portion 4B of the other connecting fitting 4 is inserted into the space 7 of the other, respectively, so that they are engaged with each other.

In this meshed state, as described above, the distance between the spaces 6 is smaller than the total thickness of the horizontal part 5B and the water-stop backing 8, so the water-stop backing 8 is adjacent to the horizontal part 5B. The horizontal portion 5B is biased against the stepped surface portion 2A, and due to the elastic force of the water-stop backing 8, the horizontal portion 5B comes into close contact with the other horizontal portion 4B.

In this way, the sheet pile body 1 includes the water-stop backing 8 part,
The horizontal parts 4B and 5B are connected in a double watertight manner in close contact with each other.

Note that the space 6 formed when the connecting fittings 4 and 5 are engaged
, 7 can be injected with a filler such as cloud to further improve watertightness.

Furthermore, when the sheet pile bodies 1 are spliced together as described above, since the protrusions 2B and 3B are formed on the connecting end faces 2 and 3, these protrusions 2B and 3B are connected to the adjacent step surface parts 2A and 3B, respectively. By joining with 3A, extreme bending of the sheet pile body 1 to be spliced can be prevented.

As described above, the sheet pile according to the present invention has stepped surface portions 2A and 3 by cutting out both corner portions at diagonal positions on both connecting end surfaces 2 and 3 of the sheet pile main body 1.
A and protrusions 2B and 3B are shaped respectively, and L is formed from both step surfaces.
The connecting fittings 4゜5 projecting in shape are bent toward the protrusions 2B and 3B, respectively, so that they can engage with each other, and a waterproof backing 8 is attached to the outer surface of the horizontal part of the connecting fittings. The water backing 8 is configured so that when the connecting fittings 4 and 5 are engaged, pressure is biased between it and the stepped surface portion of the other party to be connected, and the surface portions of the connecting fittings 4 and 5 are brought into close contact with the water-stop backing 8 by elastic force. (1) The connection is made by interlocking the connections, and the structural strength is high and reliable.

■ Due to the engagement of the connecting fittings, the water-stop backing is biased between the horizontal part of the metal fitting and the step surface of the adjacent sheet pile, and the horizontal parts of the connecting fittings come into close contact with each other due to the elastic force of the water-stop backing. Because of this effect, the connection part has a double watertight structure with a watertight backing and a horizontal part, ensuring watertightness.

■ Since the connecting metal fittings do not come into direct contact with the mating end surface and are connected via the backing, there will be no damage to the mating sheet pile during construction.

There are various effects such as.

[Brief explanation of the drawing]

Figure 1 is a front view of the concrete sheet pile to which the present invention has been applied, Figure 2 is a side view of the same, Figure 3 is an enlarged plan view of the same, Figure 4 is an enlarged front view of the lower end of the concrete sheet pile, and Figure 5 is It is a top view showing the connected state of the same concrete sheet pile. 1... Sheet pile body, 2, 3... Connection end surface, 2A. 3A...Stepped surface portion, 2B, 3B...Protrusion portion, 4, 5...Connecting fittings, 8...Water stop backing.

Claims (1)

[Scope of utility model registration request] Both connecting end surfaces 2 and 3 of the sheet pile body 1 are cut out from both corner portions at diagonal positions to form stepped surface portions 2A and 3A and ridge portions 2B and 3B, respectively, which protrude in an L shape from both stepped surface portions. The connecting fittings 4 and 5 are bent toward the protrusions 2B and 3B, respectively, so that they can engage with each other, and a water-stop backing 8 is attached to the outer surface of the horizontal part of the connecting metal fittings. Connecting fittings 4
, 5 are engaged, pressure is biased between them and the step surface of the other party to be connected, and due to the elastic force of the water-stop backing 8, the connecting fitting 4
, 5. A concrete sheet pile characterized by being configured so that the facing portions in 5 are brought into close contact with each other.