JPH0565096A - Pontoon with leg - Google Patents

Abstract

PURPOSE:To prevent a pontoon of concrete, etc., which is designed for out of movement, from swinging or flowing away and provide possibility of complying with the tide by structuring so that a pair of legs for sliding are fitted in a drive pipe driven into the ground in the friction pile system. CONSTITUTION:A pontoon of concrete, etc., (floating boat, barge type bridge pier, etc., which is designed for out of movement) is constructed by driving a drive pipe 1 in the ground in the friction pile system and consolidating the foundation of the pipe with base-stones. A pair of legs 3 for sliding are fitted in the drive pipe 1 and fixed to a float 4. A clearance chamber 5 corresponding to the tide difference is bouded in the drive pipe 1, and there a flange provided with a communication hole 6 is fixed. Accordingly the sea water flows into and out of the pontoon through the communication holes 6 associate with rising and sinking of the float 4. Thereby the pontoon is prevented from swinging or flowing away, and its mooring can be done certainly and safely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pontoon made of concrete or the like (especially a floating boat / flat-bottom ship type pier not intended for movement).

[0002]

2. Description of the Related Art Conventionally, pontoons are moored by ropes or anchors from land.

[0003]

However, in this case, there was a case where it was shaken or swept by the reaction.

[0004]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention seeks to provide a pontoon having a pair of legs which are fitted into a drive pipe driven into the ground in a friction pile type and have a pair of sliding pairs. Is.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. A drive pipe (1) driven into the ground in a friction pile type.
Is a pontoon in which the legs (3), which are fitted to the pipe of the drive pipe (1) and which form a sliding pair, are fixed to the levitation body (4). It should be noted that a clearance chamber (5) corresponding to the full water gap is secured below the inside of the drive pipe (1) to break the airtightness between the clearance chamber (5) and the outside (seawater). ) A flange (7) having a large number of communication holes (6) formed therein is fixed at appropriate intervals, and the flange (7) and the leg (3) form a sliding pair. As shown in FIG. 3, the float (4) and the leg (3) may be connected in a loosely fitted state.

The root stone (2) obtains a reaction force of passive earth pressure from the ground on the outer peripheral wall surface and stabilizes the drive pipe (1).
Since the drive pipe (1) itself is driven into the ground in a friction pile manner, it is stable due to its frictional force. The upper ends of the legs (3) are fixed to the levitation body (4), and the lower part of the legs (3) is slidably supported by the flange (7) of the drive pipe (1), and is allowed to move only up and down. So even if the floater (4) moves up and down according to the dryness,
Can be moored in place. When the floating body (4) descends, the seawater in the clearance chamber (5) is pushed out to the outside (seawater) by the descending legs (3). The communication hole (6) is for securing this drainage channel. When the floating body (4) rises, conversely, seawater flows from the outside (seawater) toward the clearance chamber (5). In this case, the communication hole (6) serves as an inflow path. When the levitation body (4) and the leg (3) are connected in a loosely fitted state, the levitation body (4), which is easily subjected to external force such as wave force, and the leg (3), which is fixed except in the vertical direction, are harmonized. Can be planned.

[0007]

As a result, it is possible to avoid an accident in which the pontoon shakes due to a reaction such as a berth of a ship and collides with another ship that is approaching the pontoon, and the pontoon does not flow and move. It is possible to safely moor a pontoon having a large span in which the swing amplitude is large, or a pontoon having a large span such as T-type, F-type, and H-type in which local stress is likely to occur due to shape.

[Brief description of drawings]

FIG. 1 is an elevational view showing the present invention.

FIG. 2 is a plan view showing the present invention.

FIG. 3 is a sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 1 Drive pipe 2 Root stone 3 Leg 4 Floating body 5 Clearance chamber 6 Communication hole 7 Flange

Claims (1)

[Claims] 1. A pontoon having legs that are fitted into a drive pipe driven into the ground in a friction pile type to form a sliding pair.