JPS6319396Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an anchor pile.

For example, single-point mooring buoys for oil cargo handling, offshore plants, etc. are conventionally anchored to the seabed with anchor piles 01 via chains or wires, as shown in the side view of Figure 1. There are two methods: one is to push the pile into the soil with the impact force of a hammer, and the other is to drill a hole in the seabed in advance and then fill the surrounding area with cement grout after inserting the pile.However, the former method is preferred in terms of the pile's supporting capacity and workability. Are better.

On the other hand, the connections between the anchor pile body 01 and mooring ropes such as chains and wires are shown in Figure 2, a partially enlarged view, and Figure 3.
As shown in the plan view, the shackle 03 is attached to the eye plate 02 that protrudes from the pile body, so when driving with a hammer, this protrusion receives the reaction force of the ground and has a considerable resistance force. Therefore, a large hammer must be used or the number of hammer blows must be extremely large.If the number of hammer blows is increased, there are problems such as damage to the pile head.

The present invention was proposed in view of these circumstances, and aims to provide an anchor pile that facilitates installation work on the seabed. an axial parallel eye plate extending axially across the notch and welded into the pile body; and a shackle pivotally connected to the parallel eye plate exposed in the notch via a lateral shackle pin. It is characterized by the following.

An embodiment of the present invention will be explained with reference to the drawings.
Fig. 4 is a partial side view, and Fig. 5 is a - of Fig. 4.
FIG.

In the above figure, 1 is a cylindrical steel pipe pile body, 2 is a plurality of mutually parallel eye plates welded into the pile body 1, 3 is a shackle pivotally connected to the eye plate 2, and 4 is for attaching the shackle. The pile notch 5 is a shaft pin.

For such piles, a notch 4 is made in the pile body at the factory to the extent that the shackle 3 can be installed on site according to the size of the shackle, and three eye plates 2 (the number required for strength) are installed in the pile body according to the size of the shackle. The pile is lapped with the non-cut portion of the pile by the length and welded, and the shaft 3 and the soil chain are attached at the site, and the pile is driven into the soil by a work boat or inserted into a pre-drilled hole.

In such an anchor pile, the area that receives resistance from the ground during installation is almost only the circular cross section of the pile, so that impact resistance can be reduced.

On the other hand, so-called grout piles, in which a hole is dug in advance and cement grout is applied to the surrounding area after inserting the pile (used when the seabed ground is rock, etc.)
Even in construction, the diameter of the drilled hole can be small.

Driving anchor piles requires the provision of appropriate workboats, hammers, and other equipment on site, which are generally expensive; however, by adopting this invention, the following effects can be achieved. be given

(1) Hammer size (capacity) can be reduced.

(2) Pouring time (construction period) can be shortened.

(3) Less reinforcement (usually by increasing the thickness of the plate) to prevent impact damage to the head of the anchor pile is required.

(4) In the case of grout piles, the diameter of the excavation hole is small.

(5) The pile itself is easy to handle during transportation to the site.

(6) Increased reliability of eye plate strength (damage prevention during pouring).

In short, according to the present invention, a notch is formed in the side surface of a steel pipe pile body, an axial parallel eye plate extends axially across the notch and is welded into the pile body, and the notch is welded into the pile body. The present invention is industrially extremely useful because it provides an economical anchor pile that reduces the installation cost by providing a shackle pivotally connected to the parallel eye plate exposed to the shank via a lateral shackle pin. It is something.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a known anchor pile installed on the seabed, Fig. 2 is a partially enlarged view of Fig. 1,
3 is a horizontal cross-sectional view of FIG. 2, FIG. 4 is a partial side view showing an embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along - in FIG. 4. 1...Pile body, 2...Eye plate, 3...
...Shackle, 4...Notch, 5...Shackle pin.

Claims (1)

[Scope of utility model registration request] A notch cut out on the side of the steel pipe pile body,
an axial parallel eye plate extending axially across the notch and welded into the pile body; and a shackle pivotally connected to the parallel eye plate exposed in the notch via a lateral shackle pin. Anchor pile characterized by being equipped with.