JPS6124726A - Method of securing pile and bed seat - Google Patents

Abstract

PURPOSE:To increase the anchoring force of a bed seat, by a method wherein, after a pile is inserted into a cylinder body, located upright to the bed seat installed on a sea bottom foundation, to hammer it, the pile and the cylinder body are both plastically deformed. CONSTITUTION:A pile 2 is inserted through an upper funnel-shaped part 5a of a guide 5 for pile insertion, a pin 6 is threadedly engaged with a pin hole 2a in the pile 2 to intercouple a cylinder part 5a of the guide 5 and the pile 2. A lower funnel-shaped part 5c of the guide 5 is inserted into a cylinder body 1a on a bed seat 1, and after the pile 2 is coincided with the core of the cylinder body 1a, the pile 2 and the guide 5 are released from coupling by unscrewing the pin 6. After the pile 2 is penetrated through the cylinder body 1 1a into a sea bottom foundation, a pile securing device 7, provided with deforming mold extruders 9, is set. Further, after deforming molds 8 are extruded by the extruders 9 to plastically deform the pile 2 and the cylinder body 1a, the pile 2 is rigidly coupled with the cylinder body 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method of fixing a pedestal of an underwater structure and a pile for anchoring the pedestal to the underwater ground.

``Conventional technology'' Conventionally, when anchoring a pedestal installed on underwater ground, the piles were inserted into pile holes provided in the pedestal to penetrate into the underwater ground to increase the anchoring force of the pedestal by the piles. Inject /2 udo into the gap between the two.

``Problems to be Solved by the Invention'' However, in the conventional method described above, the anchoring force of the pedestal relies only on the adhesion force of the grout, so the stress in the axial direction of the pile, that is, the grout is applied over a long range against pulling out or pushing. However, there were problems such as poor reliability.

``Means for Solving the Invention'' The present invention was proposed to solve these problems, and involves inserting and driving piles into a cylindrical body erected on a pedestal installed on an underwater foundation. The present invention relates to a method for fixing a pile and a pedestal, which is characterized in that the pile and the cylindrical body are subsequently plastically deformed.

"Operation" As described above, in the present invention, a cylindrical body is erected on a pedestal installed on an underwater base, a pile is inserted and driven into the cylindrical body, and then both the pile and the cylindrical body are plastically deformed. As a result, the cylindrical body and the pile are rigidly connected in both the pushing and pulling directions of the pile, and as a result, the pedestal is firmly anchored to the underwater base.

"Example" The present invention will be described below with reference to the illustrated embodiments.

(1) is a pedestal installed on the underwater base, which has a cylindrical shape (1α
) is erected through the pedestal (1).

(2) is a stake for anchoring the pedestal (1,) to the underwater base.

When fixing the sailing vessel (2) to the pedestal (1) and anchoring the pedestal (1) to the underwater base, first place the top part on the deck (3) of a work barge, etc., as shown in Figure 2. A cylindrical jig (4) having a pile temporary placement part is temporarily placed in the jig (4), and a funnel-shaped part (5b) is attached to both the upper and lower ends of the cylindrical body (5α) C30).
A pile insertion guide Q (5) in which a pin (6) for temporarily attaching a pile to the cylindrical part (5α) is screwed.
Insert.

Next, as shown in FIG. 3, the pile (2) is inserted through the upper funnel-shaped part (5b) of the pile insertion guide (5) and the jig (4) is inserted.
), screw the bottle (6) into the hole (2α) of the pile (2), and connect the cylindrical part (5cL) of the pile insertion guide (5) with the pile (2). Then, as shown in Figures 4 and 5, insert the lower funnel-shaped part (5C) of the pile insertion guy (5) into the cylindrical body (lα) on the base (1), and Using the funnel-shaped part (5C) as a guide, align the cores of the stake (2) and the cylindrical body (1α), and place the bottle (
6) to release the connection between the pile (2) and the pile insertion guy (57), making it possible to drive the pile (2).

Next, the pile (2) is penetrated through the cylindrical body (1α) and into the underwater foundation, and after the driving of the pile (2) is completed, the pile is fixed as shown in FIGS. 6 and 7. Set up the device.

(7) is a fixing device support frame with a deformable type (8) on its inner facing surface.
) and a modified extrusion device (9) such as a hydraulic jack are attached to the support frame (7) through a holding member protruding from the lower surface of the support frame (7). A guide member aυ is installed.

By extruding the deformed mold (8) in the pile fixing device by the deformed extrusion device (9), both the cylindrical body (1α) and the pile (2) are made as shown in the box in FIG. The pile (2) and the cylindrical body (1α) are rigidly fixed by plastic deformation, and the pedestal (1) is anchored to the underwater base via the rotation (2).

"Effects of the Invention" In the present invention, the cylindrical body erected from the pedestal installed on the underwater foundation and the pile inserted and driven into the cylindrical body are plastically deformed together, so that the pedestal and the pile The pedestal is firmly anchored to the underwater base by firmly connecting the pile in both the pushing and pulling directions.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing a plastically deformed portion of a pile and a pedestal cylindrical body constructed by an embodiment of the method for fixing a pile and a pedestal according to the present invention, and FIGS. FIG. 7 is a plan view of FIG. 6, a longitudinal sectional view showing the steps of the method. (1)...Pedestal, (1α)...Cylindrical body, (2)...
・Pile, (4)...Plastic Deformation Department Sub-Agent Patent Attorney Shige Okamoto 3 people outside the text 10 Figure 2 Figure 50 Figure 7 Figure 60

Claims (1)

[Claims] A method for fixing a pile and a pedestal, which comprises inserting and driving a pile into a cylindrical body erected on a pedestal installed on an underwater foundation, and then plastically deforming both the pile and the cylindrical body.