JP2000336626A - Method of constructing offshore structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of constructing an offshore structure capable of shortening the construction period and reducing the construction cost by forming an offshore structure having a wide area like a landing area requiring the widest area in an offshore air port of large floor panel blocks and the piled foundation. SOLUTION: This method of constructing an offshore structure is formed of a process for manufacturing a floor panel for constructing an offshore structure while dividing it into blocks 2 and carrying the blocks loaded on a carrying ship 14 to the construction field and for setting the blocks between the foundation pile placing carrier chip 22 and the constructed floor panel block 2A, a process for placing foundation piles 9 into the floor panel blocks 2 through previously set pile placing holes 3, a process for cutting the pile heads for alignment and for connecting the floor panel blocks and the foundation piles 9 to each other with temporary fixing caps and for filling the mortar between the foundation piles 9 and the floor panel blocks 2, a process for bonding both the floor panel blocks to each other while welding the steel beams to each other and placing the floor panel concrete, and a process for paving the joint part of the floor panel blocks 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a marine structure, and more particularly to a method of constructing a marine structure suitable for constructing a take-off and landing area requiring the largest area among marine airports. about.

[0002]

2. Description of the Related Art In order to construct a marine airport, a conventional landfill method has been used. However, when using the landfill method, the construction period is prolonged, and the construction cost is increased.

In particular, the construction of a take-off and landing area that requires the largest area among marine airports has a problem of prolonging the construction period and increasing construction costs.

[0004] A method has been proposed in which a floor slab is partially blocked and a marine structure is constructed by using a floor slab block and a pile foundation. It cannot be used to build a large-area marine structure, such as an airport take-off and landing area, far away from the quay.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention is to construct a large-area marine structure such as a take-off and landing area requiring the largest area of a marine airport by using a large floor slab block and a pile foundation. It is an object of the present invention to provide a method of constructing a marine structure capable of shortening the construction period and reducing the construction cost.

[0006]

According to the present invention, a slab for constructing a marine structure is divided into blocks and manufactured, and is set between a foundation pile driving barge and a completed slab block. The method comprises the steps of: driving a foundation pile through a pile driving hole provided in advance in the floor slab; and connecting the floor slab to the foundation pile.

The method for constructing a marine structure is suitable for constructing a take-off and landing area requiring the largest area among marine airports.

A slab for constructing a marine structure is divided into blocks, mounted on a carrier, towed to the site, and set between a foundation pile driving barge and the installed slab block, and a slab block is provided. Pile the foundation pile through the pile driving hole provided in advance,
By constructing a large-area marine structure such as a take-off and landing area at a marine airport, it is possible to shorten the construction period and reduce construction costs.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described by taking as an example a case where a take-off and landing area at a marine airport is constructed according to the present invention.

FIGS. 1 to 3 show the structure of a take-off and landing area of a marine airport. In FIG.
224 m, width 490 m, length 1 shown in FIG.
32 m wide, 17.5 m wide slab block (slab panel) 2
Are connected in a total length of 896, 32 in the length direction and 28 in the width direction. The slab panel 2 is composed of steel pipe piles 9 cast under the seabed 8, as shown in FIG. Supported by

Next, the steps of constructing the take-off and landing area of the sea airport include loading slab panels, transporting slab panels, installing slab panels, setting foundation piles, connecting foundation piles and slab panels,
Description will be made in the order of connection between the floor panels.

FIGS. 4 and 5 show the loading status of the floor slab blocks (floor panels). An air caster 11 is installed on the lower surface of the (factory-made) floor slab 2 manufactured on the quay 10. The quay 1 up to the floor slab panel carrier 14 settled on the seabed support 13 supported by the pier support base 12
Pull in by winch 18 above zero. After being pulled in, the air casters 11 are collected.

The floor slab panel carrier 14 is provided with a lifting beam 15 which is raised and lowered by a lifting jack 16 (FIG. 10). Further, the floor slab panel carrier 14 is provided with a mooring winch 17, and fenders 19 are installed on the berth 10 on the carrier berthing surface.

FIG. 6 shows the operating principle of the air caster 11, in which pressurized air is supplied to a caster bag (torus bag) 11a to expand the caster bag 11a, and a support pad 11b and a floor surface 14a.
And pressurized air is supplied to the pressure chamber 14b between the first and second floors to float the floor panel 2.

FIGS. 7 to 9 show the state of transport of the slab panels. When the loading of the slab panels 2 is completed, the slab panel carrier 14 withdraws from the factory quay after adjusting the buoyancy, as shown in FIG. At that time, the ship is towed by the towing boat 20 to the construction site. At that time, a guard ship 21 is arranged around the floor slab panel carrier 14.

At the construction site, the slab panel carrier 14 is, as shown in FIGS. 8 and 9, a base pile setting barge 22 called CEP and an installed slab block 2A (including an installed passenger terminal). (Including revetment). The arrow in FIG. 8 indicates the retraction direction of the floor slab panel carrier 14.

FIGS. 10 to 13 show installation of floor slab panels.
In FIG. 10, the foundation pile driving situation is shown. In FIG. 10, the foundation pile driving barge 22 is jacked down, and the floor slab panels 2 are lifted by the lifting jacks 15 and 16 of the floor slab panel carrier 14 (left figure). The slab panel 2 is temporarily received from the slab block 2A and the panel receiving arm 23 of the foundation pile driving barge 22 (center view), and the slab panel carrier 14 is pulled out (right figure).

In FIG. 11 and FIG.
In the state where the level adjustment of the floor slab panel 2 is completed by the jacking operation of the foundation pile driving barge 22, the pile carrier barge 24 is moored to the side of the foundation pile driving barge 22, By a crawler crane 26 mounted on a crane traveling stand 25 moving on the foundation pile driving barge 22, the steel pipe pile 9 serving as the foundation pile stands up through the pile driving hole 3 of the floor panel 2.

A hydraulic hammer power unit 27 is provided on the foundation pile driving barge 22, and another crane 28 is provided on the floor panel 2.

In FIG. 13, when the steel pipe pile 9 is completely erected, the crawler crane 26 moves the hydraulic hammer 29
Is set on the pile head and driven to the specified depth.

FIGS. 14 to 16 show the connection between the foundation pile and the floor slab panel. When the foundation pile (steel pipe pile) 9 is completed, the pile head is trimmed to a predetermined height and the temporary fixing cap 30 is set.
Is inserted into the pile driving hole 3 of the floor panel 2 and set on the pile head.

Next, the temporary fixing cap 30 is rotated in the direction shown by the arrow to engage the cap-side tapered collar 30a with the pile driving hole-side cap stopper 4, and the floor slab panel 2
Is received by the foundation pile 9.

Thereafter, mortar is poured into the tube 31 at the lower end of the pile driving hole to form a bottom cover, and then the mortar 32 is filled and fixed between the outer periphery of the foundation pile 9 and the inner periphery of the pile driving hole 3. I do.

A reinforcing bar 33 is previously welded to the outer periphery of the foundation pile 9 and the inner periphery of the pile driving hole 3 so that the mortar 32 can be sufficiently adhered.

FIG. 17 and FIG. 18 show the joining of the slab panels, and the precast concrete slabs 5 constituting the slab are shown in FIGS.
This is performed by placing concrete 35 between the welding 34 of the steel girders 7, 7A receiving the 5A and the outer frame of the facing precast concrete plates 5, 5A.

In FIG. 17, the right side is the existing side, and the left side is the new side.
The steel girders are connected to each other so that when the floor panel is temporarily received by inserting the knock pin 37 into the hole of the new side girders 7 and the panel slab is not misaligned.

In FIG. 17, a bottom cover 38 is installed when concrete is cast in place, and the reinforcing steel 6 of the precast concrete slabs 5 and 5A and the cast-in-place concrete 35 are used.
To the reinforcing bar 36.

[0028]

According to the present invention, a floor slab for constructing a marine structure is divided into large blocks, mounted on a carrier, and towed to the site. And laying a foundation pile through a pile driving hole provided in advance on the floor slab block to construct a marine structure, so a marine structure with a large area such as a take-off and landing area of a marine airport It can be constructed in a shorter time and at lower cost than the conventional method.

[Brief description of the drawings]

FIG. 1 is a plan view of a take-off and landing area of an airport.

FIG. 2 is a plan view of a floor panel.

FIG. 3 is an enlarged view of an arrow A in FIG. 2;

FIG. 4 is a view showing a loading state of floor slab panels.

FIG. 5 is an enlarged view of an arrow A in FIG. 4;

FIG. 6 is an operation principle diagram of an air caster.

FIG. 7 is a diagram showing a state in which a carrier on which floor slab panels are loaded is towed by a towing boat.

FIG. 8 is a plan view of a carrier loaded with floor slab panels moored between a foundation pile driving barge and a completed floor slab block.

FIG. 9 is an enlarged view of an arrow A in FIG. 8;

FIG. 10 is a front view showing the installation order of floor slab panels.

FIG. 11 is a front view showing a foundation pile construction situation.

FIG. 12 is a plan view showing a foundation pile construction situation.

FIG. 13 is a front view showing a foundation pile driving situation.

FIG. 14 is a plan view in which a foundation pile and a floor slab panel are connected by a temporary fixing cap.

FIG. 15 is a side sectional view in which a foundation pile and a floor slab panel are joined by a temporary fixing cap.

FIG. 16 is an explanatory view showing a state in which a cap side tapered collar and a pile driving hole side tapered stopper are engaged with each other.

FIG. 17 is a cross-sectional view showing a welding situation in joining the floor slab panels.

FIG. 18 is a cross-sectional view showing a concrete casting situation in joining the floor slab panels.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... take-off and landing area of airport 2 ... floor panel 3 ... pile driving hole 4 ... pile driving hole side taper stopper 5 ... precast concrete plate 6 ... rebar 7 ... Steel girder 8 ・ ・ ・ Seabed bed 9 ・ ・ ・ Steel pipe pile 10 ・ ・ ・ Wharf 11 ・ ・ ・ Air caster 12 ・ ・ ・ Support base foundation pile 13 ・ ・ ・ Sea bottom support base 14 ・ ・ ・ Floor panel carrier 15 ... Lifting beam 16 ... Lifting jack 17 ... Mooring winch 18 ... Wharf winch 19 ... Fender 20 ... Towing boat 21 ... Watching boat 22 ... Foundation pile driving Setting boat 23 ・ ・ ・ Panel receiving arm 24 ・ ・ ・ Pile boat 25 ・ ・ ・ Crane traveling stand 26 ・ ・ ・ Crawler crane 27 ・ ・ ・ Hydraulic hammer power unit 28 ・ ・ ・ Crane 29 ・ ・ ・ Hydraulic hammer 30 ・..Temporary fixed cap 31 ... tube 32 ... mortar 33 ... reinforcing steel 34 ... welding 35 ... punch set concrete 36 ... reinforcing steel 37 ... knock pin 38 ... bottom cover

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yuichi Yoshino Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku, Tokyo (72) Inventor Kazuo Kokubu Yonbancho, Chiyoda-ku, Tokyo 9-6 Yonbancho Plaza 1001

Claims (5)

[Claims] A slab for constructing a marine structure is divided into blocks, manufactured and set between a foundation pile driving barge and a completed slab block, and provided on the slab block in advance. A method for constructing a marine structure, comprising: a step of driving a foundation pile through a pile driving hole; and a step of connecting a floor slab and a foundation pile. 2. A floor slab for constructing a marine structure is divided into blocks and manufactured, mounted on a carrier and towed to the site, and set between a foundation pile driving barge and the completed floor slab block. And the step of placing the foundation pile through the pile setting holes provided in the floor slab, and cutting the pile heads and connecting the floor slab and foundation pile with the temporary fixing cap. A step of injecting and fixing mortar between the plate block,
A step of jointing the slab blocks with each other by welding a steel girder and placing slab concrete; and a step of continuously paving from a joint where the slab blocks are completed. Offshore structure construction method. 3. The construction of a marine structure according to claim 2, wherein the foundation pile is erected and set by a crawler crane mounted on a crane traveling platform that moves on the base pile setting gantry. Method. 4. A taper stopper on the pile driving hole side of the floor slab block and a taper collar on the temporary fixing cap side are engaged with each other,
The method for constructing a marine structure according to claim 2 or 3, wherein the floor slab and the foundation pile are connected. 5. The offshore structure construction method according to claim 2, wherein the offshore structure is a take-off and landing area of an airport.