JP2004011363A - Jacket structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jacket structure surely enhanced in rigidity while preventing the enlargement of size and never impairing the appearance or the like. <P>SOLUTION: A reinforcement part 10 is provided in the inner part of a pile guide-main member 2. The reinforcement part 10 is provided in the connection part of the pile guide-main member 2 with a connecting member within the pile guide-main member 2, and it has a plurality of reinforcing ribs 12 arranged on the inside of the pile guide-main member 2 and a cylindrical body 11 fixed between the reinforcing ribs 12. The reinforcing ribs 12 are radially fixed at prescribed intervals on the inside of the pile guide-main member 2 along the inside. The cylindrical body 11 is made of a steel having a space P having a size allowing the insertion of a pile driven to the inside thereof, and fixed to the tip ends of the reinforcing ribs 12. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a jacket structure installed on a submarine ground such as a seabed when a pier or the like is constructed on the submarine ground.
[0002]
[Prior art]
When piers are constructed on the seabed, solid foundations, pile foundations, etc. are used for the seabed. Is particularly advantageous, and among them, the jacket type foundation is particularly advantageous.
This foundation jacket structure is configured by connecting a plurality of pile guide / main members, which are also main members also serving as pile guides, to the seabed ground by connecting members, and is set at the installation position. Then, a pile driver (not shown) drives the pile into the submarine ground while guiding the pile by the pile guide / main member.
[0003]
[Problems to be solved by the invention]
By the way, as described above, the conventional jacket structure is composed of a plurality of pile guide / main members and a connecting member for connecting the pile guide / main members, and is used for connecting to the jacket structure during an earthquake or the like. When an external force is applied, there is a problem that a remarkable stress is concentrated on a connecting portion between the pile guide / main member and the connecting member.
In order to solve the above-mentioned problem, in order to increase the rigidity between the pile guide and main member and the connecting member, A) a reinforcing material as a reinforcing collar is exposed around the pile guide and main member, and B) the pile guide is also used. The diaphragm is protruded and provided inside the main member, and C) the plate thickness of the connection portion of the pile guide and the main member with the connection member is increased. However, in the case of A), there is a problem that the reinforcing material is exposed to the outside and the overall size is increased, the appearance is impaired, and furthermore, the anticorrosion treatment is complicated and the like. In the case of B), when the pile is inserted into the pile guide / main member, the tip of the pile is hooked on the diaphragm, making it difficult to insert the pile, and sometimes causing an obstacle to the pile driving. In the case of C), the thickness of the pile guide / main member was locally increased, so that the production was troublesome.
[0004]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a jacket structure that can reliably increase rigidity, prevent an increase in size, and does not impair the appearance or the like. To provide.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention proposes the following means.
The invention according to claim 1 is a jacket structure formed by connecting a plurality of pile guide / main members by a connection member, and has a reinforcement having a space capable of guiding a pile inside the pile guide / main member. A part is provided.
[0006]
According to the jacket structure of the present invention, since the reinforcing portion is provided inside the pile guide / main member, even if an external force acts on the jacket structure during an earthquake or the like, the reinforcing portion allows the pile guide to be used. It is possible to reduce the concentration of stress on the connecting portion between the main member and the connecting member.
[0007]
According to a second aspect of the present invention, in the jacket structure according to the first aspect, the reinforcing portion is provided at a connecting portion with a connecting member connected to the pile guide main member.
[0008]
According to the jacket structure of the present invention, since the reinforcing portion is provided at the connecting portion, the strength of the connecting portion can be increased.
[0009]
According to a third aspect of the present invention, in the jacket structure according to the first or second aspect, the reinforcing portion is fixed between the reinforcing ribs radially fixed to an inner periphery of the pile guide main member and the reinforcing ribs. And a cylindrical body through which the pile is inserted.
[0010]
ADVANTAGE OF THE INVENTION According to the jacket structure which concerns on this invention, since a reinforcement part is formed with a reinforcement rib and a cylinder, and a pile guide combined use main member has a double structure, the intensity | strength of a pile guide combined use main member is reliably improved. be able to.
[0011]
The invention according to a fourth aspect is characterized in that, in the jacket structure according to any one of the first to third aspects, the reinforcing portion is provided with a guide portion for introducing a pile into the cylindrical body.
[0012]
ADVANTAGE OF THE INVENTION According to the jacket structure which concerns on this invention, at the time of insertion of a pile, since a pile can be guided in smoothly, driving of a pile can be performed favorably.
[0013]
According to a fifth aspect of the present invention, in the jacket structure according to any one of the first to fourth aspects, the reinforcing portions are arranged at predetermined intervals in a circumferential direction inside the pile guide / main member, and It is characterized by comprising a T-shaped member forming a discontinuous cylindrical body through which a pile is inserted.
[0014]
According to the jacket structure according to the present invention, the reinforcing portion is formed by the T-shaped member forming the discontinuous tubular body through which the pile is inserted, so that the reinforcing portion reduces the strength of the pile guide / main member. It can certainly be increased.
[0015]
The invention according to claim 6 is the jacket structure according to claim 5, wherein the T-shaped member is formed by cutting an H steel material.
[0016]
According to the jacket structure according to the present invention, a T-shaped member can be manufactured only by cutting the H steel, so that the T-shaped member is disposed on the pile guide / main member so that the pile can be inserted. The discontinuous cylindrical body to be formed can be easily formed.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 3 are views showing a jacket structure according to an embodiment of the present invention and a point portion thereof. FIG. 1 is an overall view showing the jacket structure, and FIG. FIG. 3 is an enlarged sectional view corresponding to line AA of FIG. 2 showing an essential part.
The jacket structure 1 shown in FIG. 1 includes a plurality of pile guide / main members 2 which are also main members also serving as guides for the piles 5, and a connecting member 3 which connects the pile guide / main members 2 together. . The jacket structure 1 is manufactured at a dock or the like in a factory, and then transported by sea or the like by towing or the like, where it is set at an installation position of the submarine ground 4 while maintaining a balance by a crane (not shown). Thereafter, when a pile driver (not shown) drives the pile 5 into the submarine ground 4 by the pile guide / main member 2, the driven pile 5 and the jacket structure 1 are connected and integrated with each other. The foundation is formed.
[0018]
In this embodiment, as shown in FIGS. 2 and 3, a reinforcing portion 10 is provided inside the pile guide / main member 2. The reinforcing portion 10 is provided at a connection portion between the connecting member 3 and the pile guide / main member 2 inside the pile guide / main member 2, and can guide the pile when the pile 5 is inserted therein. It has a space P. That is, the pile guide / main member 2 includes a plurality of reinforcing ribs 12 provided on the inner periphery thereof, and the tubular body 11 fixed between the reinforcing ribs 12. As shown in FIG. 3, the reinforcing ribs 12 are radially fixed to the inner periphery of the pile guide / main member 2 at predetermined intervals along the inner periphery. The tubular body 11 is made of steel and has a space P large enough to allow the pile 5 to be inserted therein, and is fixed coaxially to the pile guide / main member 2 at each end of the reinforcing rib 12.
[0019]
The reinforcing ribs 12 and the cylindrical body 11 are first fixed to the inner periphery of the pile guide / main member 2 by welding or the like with respect to the pile guide / main member 2. After the body 11 is positioned, the cylinder 11 is fixed to the reinforcing rib 12 by, for example, laser welding from the inside of the cylinder 11, thereby being provided inside the pile guide / main member 2. The member 2 has a double structure.
[0020]
In the jacket structure 1, stress concentration may occur at a connection portion between the pile guide main member 2 and the connection member 3 when an external force is applied such as during an earthquake.
However, in this embodiment, as described above, the reinforcing portion 10 formed so that the pile 5 can be inserted into the pile guide / main member 2 is provided, so that the pile guide / Concentration of stress on the connecting portion between the member 2 and the connecting member 3 can be reduced, so that the reinforcing portion 10 can provide sufficient strength between the pile guide main member 2 and the connecting member 3.
[0021]
Further, when the reinforcing portion 10 is provided inside the pile guide / main member 2, no member is exposed outside the pile guide / main member 2, so that it is possible to prevent the jacket structure 1 from being enlarged. As much as possible, there is no risk of damaging the appearance. In addition, since it does not protrude outside, it does not hinder the anticorrosion treatment.
[0022]
Further, since the reinforcing member 10 has the cylindrical body 11 fixed to the inner periphery of the pile guide / main member 2 via the reinforcing ribs 12 arranged radially, the cylindrical body 11 itself has necessary and sufficient rigidity. In addition, the guide of the pile 5 can be satisfactorily performed by the space P in the cylindrical body 11, and there is no obstacle to the pile driving. And since the cylinder 11 is fixed to the reinforcing rib 12 by laser welding from the inside, it can be securely fixed even if it is an operation of providing a member inside the pile guide / main member 2, The production becomes easier as compared with locally increasing the thickness of the pile guide / main member.
[0023]
FIG. 4 shows a jacket structure according to a second embodiment of the present invention. This embodiment is different from the above embodiment in that a guide portion 14 for introducing a pile 5 to be cast into a cylindrical body 11 is provided in a reinforcing portion 10.
That is, the guide portion 14 extends upward from the upper end of the reinforcing rib 12 provided between the pile guide main member 2 and the cylindrical body 11 to form an extended portion 13. The taper shape is formed so as to gradually open the space between the reinforcing ribs 12 as the direction goes. In FIG. 4, the same parts as those in FIGS. 1 to 3 are denoted by the same reference numerals.
[0024]
As described above, when the guide portion 14 using the reinforcing rib 12 is provided on the reinforcing portion 10, the guide portion 14 introduces the pile 5 into the cylindrical body 11 when the pile 5 is driven, so that the pile 5 is By inserting the pile smoothly, it is possible to improve the driving of the pile. In addition, when the guide portion 14 is provided, the upper end portion of the reinforcing rib 12 extends above the cylindrical body 11, so that the reinforcing function can be further enhanced, and the rigidity of the reinforcing portion 10 increases.
[0025]
5 and 6 show a jacket structure according to a third embodiment of the present invention.
In this case, as shown in FIG. 6, the reinforcing portion 10 is formed of a T-shaped member 15 arranged at a predetermined interval along the circumferential direction inside the pile guide / main member 2. That is, the T-shaped member 15 is fixed radially inside the pile guide / main member 2 at predetermined intervals in the circumferential direction so that the pile 5 can be inserted as shown in FIG. A continuous tubular body 16 is formed. In this case, the T-shaped member 15 is formed in advance by cutting H steel in half, and is then fixed in the pile guide / main member 2 by welding.
[0026]
According to this embodiment, the guide portion 10 substantially similar to the embodiment shown in FIGS. 1 to 4 can be formed only by welding the T-shaped member 15 to the pile guide / main member 2. As compared with the embodiment shown in FIGS. 1 to 4, the number of manufacturing steps can be significantly reduced, and the jacket structure 1 having excellent rigidity can be manufactured more easily.
[0027]
In addition, the T-shaped member 15 can be formed only by cutting the H steel, and it is not necessary to manufacture the T-shaped member 15 with a rolling die, a drawing die, or the like, so that a large-scale die facility is required. It is not necessary, and the members can be easily procured, and the increase in the weight of the pile guide and main member 2 can be suppressed.
[0028]
In the above embodiment, the example in which the reinforcing portion 10 is provided on the pile guide / main member 2 for guiding the slant pile is shown, but the pile guide / main member 2 for guiding the straight pile is shown. Needless to say, the same is applied to
Further, the example in which the jacket structure 1 is installed on the seabed ground 4 has been described, but the present invention is not limited to this, and the jacket structure 1 can be installed on a waterbed ground such as a lake bottom.
[0029]
【The invention's effect】
As described above, according to the first aspect of the present invention, the concentration of stress at the connecting portion between the pile guide / main member and the connecting member is prevented by the reinforcing portion provided inside the pile guide / main member. Since the structure can be reduced, the rigidity of the jacket structure can be increased, the size of the jacket structure can be prevented from being increased, and the effect of not damaging the appearance can be obtained. Further, the effect that the problem in the anticorrosion treatment can be avoided can be obtained.
[0030]
According to the second aspect of the invention, since the reinforcing portion is provided at the connecting portion, the strength of the connecting portion can be increased, and an effect of sufficiently resisting external force such as an earthquake can be obtained.
[0031]
According to the third aspect of the present invention, since the reinforcing portion is formed by the reinforcing rib and the tubular body, and the pile guide / main member has a double structure, the strength of the pile guide / main member is reliably increased. The effect that can be obtained is obtained.
[0032]
According to the fourth aspect of the present invention, at the time of inserting the pile, the pile can be guided smoothly, and the effect of favorably driving the pile can be obtained.
[0033]
According to the invention according to claim 5, since the reinforcing portion is formed by the T-shaped member forming the discontinuous cylindrical body through which the pile is inserted, the strength of the pile guide / main member can be reliably increased. The effect is obtained.
[0034]
According to the invention according to claim 6, since a T-shaped member can be manufactured only by cutting the H steel, an effect of easily forming a cylindrical body through which the pile is inserted can be obtained.
[Brief description of the drawings]
FIG. 1 is an overall view showing a jacket structure according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view illustrating a main part of a jacket structure point portion.
FIG. 3 is an enlarged sectional view corresponding to line AA of FIG. 2;
FIG. 4 is a view showing a jacket structure according to a second embodiment of the present invention, and is an enlarged view of a main part of a jacket structure point corresponding to FIG. 2;
FIG. 5 is an enlarged cross-sectional view of a jacket structure point portion showing a jacket structure according to a third embodiment of the present invention.
FIG. 6 is an enlarged sectional view corresponding to line AA of FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Jacket structure 2 Pile guide combined main member 3 Connecting member 10 Reinforcement part 11 Cylindrical body 12 Reinforcement rib 14 Guide part 15 T-shaped member 16 Discontinuous cylindrical body P Space

Claims (6)

In a jacket structure formed by connecting a plurality of pile guide and main members with a connecting member,
A jacket structure, wherein a reinforcing portion having a space for guiding a pile is provided inside a pile guide / main member. The jacket structure according to claim 1,
The said reinforcement part is provided in the connection part with the connection member connected with the said pile guide combined main member, The jacket structure characterized by the above-mentioned. The jacket structure according to claim 1 or 2,
A jacket structure, wherein the reinforcing portion includes a reinforcing rib radially fixed to an inner periphery of the pile guide / main member, and a tubular body fixed between the reinforcing ribs and through which the pile is inserted. The jacket structure according to any one of claims 1 to 3,
The said reinforcement part is provided with the guide part which introduce | transduces a pile into the said cylindrical body, The jacket structure characterized by the above-mentioned. The jacket structure according to any one of claims 1 to 4,
The reinforcing portion is a T-shaped member which is disposed at a predetermined interval in a circumferential direction inside the pile guide / main member and forms a discontinuous tubular body through which the pile is inserted. Jacket structure. The jacket structure according to claim 5,
The said T-shaped member is formed by cutting H steel material, The jacket structure characterized by the above-mentioned.

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