KR20150021226A - Support concrete structure construction method - Google Patents

Abstract

The present invention relates to a construction of a footing for a support structure and a method thereof which sufficiently secure a load carrying capacity and quickly are able to install a foundation structure to the ground (including underwater). The method includes: a step of seating a manufactured footing for a support structure to the ground having a penetrated guide pipe; a step of positioning a head inside the guide pipe by constructing a screw pile to the ground along the guide pipe; a step of fixating the screw pile inside the guide pipe using a band-type fixating device inside the guide pipe; and a step of installing a guide pipe cap in the upper side of the guide pipe to seal the guide pipe and inserting a grouting material inside the guide pipe and lower ground of the footing for a support structure through the guide pipe cap.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a support structure,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing a foundation for a support structure, and more particularly, And to a method of constructing and constructing a foundation for a structure.

The wind turbine generating power using the wind is constructed so that the blade can be installed on the rotating shaft of the generator and the power can be generated by using the rotational force generated by the rotation of the blade by the wind.

Such a wind turbine is a device for converting wind energy into electric energy, usually composed of a blade, a transmission, and a generator, and rotates a blade of a wind turbine, and generates electric power by rotating the blade.

Here, the blade is a device for converting wind energy into mechanical energy by being rotated by the wind, and the transmission device transmits the rotational force generated by the blade to the transmission gear through the central rotation axis and increases to the rotation speed required by the generator, The generator is a device that converts the mechanical energy generated by the blade into electric energy.

Such a wind power generation system is easy to operate and manage because it is simple in construction and installation, and can be unmanned and automated. In the past, wind power structures were mainly located on land, but due to problems such as wind resource capacity, aesthetics, and location constraints, it is in recent trends to build a large scale wind farm on the sea. However, there is a need for a safe installation method for blades, transmissions, and generators to be installed in a high position in order to construct a wind turbine structure safely at sea.

Therefore, the offshore wind power generation structure is largely divided into a turbine and a foundation. In this case, the turbine basically applies the same technology as a terrestrial wind turbine. These offshore wind power structures have a life span of about 20 years, and wind turbines of 3 ~ 5MW or more, which are larger than those on land, are applied. Each component of this offshore wind power structure is designed and coated to prevent corrosion damage due to salinity.

The foundation can be divided into four representative types.

Concrete caisson type is used in the early offshore wind power plant because it is easy to make and install. It can be used at a relatively shallow depth of 6 ~ 10m and its position is maintained by its own weight and friction force of the seabed ground. do. At this time, the base diameter of concrete caisson type is 12 ~ 15m.

The mono-pile type is the most common type of offshore wind farm complex currently in use. It can be installed at a depth of 25 to 30 meters and can be used for driving or drilling large diameter piles on the sea floor. Drilling) is used for large-scale complex. At this time, the base diameter of the monofile type is 3 to 3.5 m.

Jacket type is a type that is showing great interest in the present state of the offshore wind farm and can be installed at a depth of 20 ~ 80m, supported by a jacket type structure and fixed to the sea floor by piles or piles to be. It is a large-scale ocean structure, has high track record and high reliability, and is economically advantageous when used in a large-scale complex construction like a mono-pile type.

Floating type is a mandatory task for future deep-sea wind power generation, and many wind turbine companies are studying to be able to install at depth of 40 ~ 900m.

FIG. 1A is an illustration of an offshore wind power structure having a steel tower as a monofilament foundation and support structure in accordance with the prior art. FIG.

1A, an offshore wind power structure having a monofilament foundation and a steel tower according to the related art is roughly composed of a foundation and a support structure. Specifically, the tower 10, A nacelle 20, a blade 30, a monopile 40, and a transition piece 50. The nacelle 20 provided at the upper portion of the tower 10 is provided with a pitch system, a hub, a main shaft, a gear box, a high-speed shaft, a generator, (Yaw) system and the like.

The thickness of the steel pipe in the tower 10 is made of a steel pipe having a thickness of 25 to 40 mm as shown in a cross-section in which the A-A line is sectioned.

As a result, it can be understood that the foundation is to be constructed and constructed as a structure to resist a large self weight and an action load. Especially, when installed on the sea floor, economical efficiency should be secured according to the production and construction methods. It is very important to shorten the air.

FIG. 1B shows a conventional example of the base part construction.

The base portion is made of a precast concrete structure. The leg portion 61 is formed on the bottom of the tower, and the bucket portion 62 is supported on the bottom surface of the leg portion.

At this time, a hole (not shown) for constructing the mono-pile 40 is previously formed in the bucket part 62, and a perforation hole is formed in the bottom of the seabed along the hole by using an auger hole drilling machine 63.

Thereafter, the final perforator 63 is removed, and the monofilament 40 (not shown) is inserted into the perforation hole and the grouting material 64 is pressure-dispersed in the hole so that the monofilament 40 and the base are integrally formed with each other So that the load can be distributed and supported.

However, if such a method is used, it is required to operate a perforator at the seabed, and it can not effectively cope with the pulling force generated in file construction such as a mono file. Thus, in constructing a foundation of a large structure such as a offshore wind turbine, Construction methods were inevitably required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a wind turbine, which is capable of supporting a load at a lower portion of a large structure such as an offshore wind turbine, And to provide a method of manufacturing a foundation part for a structure and a construction method.

In order to achieve the above technical object

First, the foundation supporting the load at the bottom of the large structure and supporting the support load at the bottom is manufactured as the foundation for the precast support structure, and the foundation for the support structure is fixed to the ground by the file (steel pipe file, screw file, etc.) Respectively.

In this case, when the screw file is used, it is possible to fix the base portion of the support structure directly to the ground by using the screw file to exclude the drilling operation and the installation of the file in the perforation hole in order to fix the base portion of the support structure to the ground .

Secondly, the pile is constructed using a guide tube previously formed in a through hole formed in a base part of a support structure, and the pile is fixed by a band type fixing device so that the head of the pile can be fixed inside the guide pipe. And the base portion for the support structure.

This guide tube is particularly protruded to the lower ground of the foundation part of the supporting structure, so that the upper part of the pile can effectively resist (transpose) the lateral force.

Thirdly, after the piles are integrated with the base for the supporting structure by the band type fixing device, the cap is put on the guide pipe so as to be hermetically closed, the grouting material is inserted into the cap and the grouting material is press- So that it is possible to reinforce the disturbed ground beneath the foundation part of the support structure.

Forming a base for the support structure through which the guide tube passes, and seating the foundation on the ground;

Placing a pile on the ground along the guide tube so that the head is positioned inside the guide tube;

Fixing a file inside the guide tube using a fixing device inside the guide tube; And

A guide pipe cap is installed on the guide pipe to seal the guide pipe and press the grouting material into the guide pipe and the bottom of the base portion of the support structure through the guide pipe cap. And a method of construction.

Also preferably,

And the guide pipe is formed so as to protrude downward from the bottom surface of the base part for the support structure.

Also preferably,

Wherein the fixing device comprises: a semicircular tube set to enclose a file inside a guide tube; And a position fixing member disposed between the semi-circular tube and the guide tube.

The support structure according to the present invention makes it possible to install a large supporting structure such as an offshore wind power generator on the ground of a submarine more rapidly by installing and installing a base part for a supporting structure, Can be effectively secured.

In addition, when a file is installed in a foundation for a precast support structure, since a screw file is directly installed on the ground, there is no need to perform a double operation of inserting a file into a perforation hole after a separate perforation hole operation. It is possible to dramatically shorten the air of the air conditioner.

Also, since the disturbed ground below the foundation of the support structure is reinforced by press fitting of the grouting material by pile construction, the foundation for the support structure can be stably fixedly installed.

In addition, since the file is fixed to the base portion of the support structure using the band-type fixing device in the guide tube formed in advance in the base portion of the precast support structure and then integrated by the grouting material, effective settlement of the foundation portion and the pile And integration.

Further, since the guide pipe formed in the base portion for the support structure is extended to the lower portion of the base portion for the support structure, it is very advantageous in resistance to the lateral force (due to earthquake).

In addition, the base portion of the support structure of the present invention acts as a base foundation, and the pile integrated in the base portion of the support structure supports the base portion of the support structure in the ground, thereby being able to resist the bending moment action .

Further, the file is integrated with the foundation for the support structure by the guide pipe and the grouting material, thereby ensuring a greater resistance against the punching shear force of the file.

FIGS. 1A and 1B are views showing an offshore wind power structure having a monofile foundation and a steel tower according to a conventional technique, and a construction front view of a foundation portion for an offshore wind power structure.
2 is a construction view of a base part for a support structure of the present invention,
FIGS. 3A, 3B, 3C and 3D are a band-type fixing device construction view,
Figs. 4A and 4B are diagrams showing a cap tube cap construction of the present invention,
Figures 5A, 5B, 5C and 5D are flow charts of the method of making and installing the base for the support structure of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Base part (100) for supporting structure of the present invention]

The foundation 100 for a ground structure of the present invention is a prefabricated prefabricated prefabricated structure used for installing a large structure on a seabed ground such as an offshore wind power generator.

The PILE (200) for fixing the base part (100) of the supporting structure to the ground (G) can be a steel pipe. In the present invention, a screw file is used as a reference.

That is, the foundation 100 for the support structure is first placed on the seabed ground G and the pile 200 is passed through the plurality of guide tubes 110 previously formed in the foundation 100 for the support structure So that the head of the pile 200 inserted into the guide tube 110 of the base part 100 for the supported support structure is integrated with the base part 100 for the support structure.

Specifically, as shown in FIG. 2,

First, the base part 100 for the support structure is a circular plate structure having a predetermined thickness, for example, and a center holder part 120 in which a tower of an offshore wind power generator can be inserted and formed can be formed at the center part.

A guide pipe 110 is formed in the base part 100 for supporting structure to insert a pile 200 to be described later. The guide pipe 110 is formed in a plurality of .

The guide pipe 110 may be a steel pipe. The steel pipe having a predetermined diameter may be buried in advance in the process of manufacturing the base part 100 of the support structure. The guide pipe 110 may include a base part 100 So as to protrude and extend from the bottom of the bottom surface.

The lower portion of the guide pipe 110 is installed in such a manner that the ground G is embedded in the foundation structure 100 for the support structure by the weight of the foundation structure 100 when the foundation 100 for the support structure is first placed on the seabed ground G will be.

The pile 200 is installed on the ground G along the guide pipe 110 protruding from the bottom of the base part 100 for supporting structure.

In particular, the file 200 as a file has a screw (helical rotary blade) formed on the outer circumferential surface of a steel pipe, and rotated and press-fitted into the ground G along the guide pipe 110 while being rotated using an auger do.

If the file 200 is press-fit, the file can be constructed with one push-in construction. Therefore, the workability and workability are greatly improved compared with the conventional method in which the file is separately formed after forming the perforation hole.

At this time, when the file 200 is installed through the guide pipe 110, the file 200 is fixed to the foundation 100 for the support structure inside the guide pipe 110.

This settlement is important because the file 200 must be integrated with the foundation 100 for the support structure so that the load transferred to the foundation 100 for the support structure can be effectively transferred to the ground through the pile 200 .

In addition, the base part 100 for the support structure acts as a base foundation, and the pile 200 integrated in the base part for the support structure supports the base part of the support structure in the ground, so that it can resist the bending moment action And the like.

Furthermore, the file 200 is integrated with the base for the support structure by the guide pipe 110 and the grouting material 500, which will be described later, so that the resistance against the punching shear force of the file can be further secured.

Further, the present invention proposes a band-type fixing device as the fixing device 300 for fixing the pile 200 to the base 100 for the supporting frame, as shown in Figs. 3A to 3D.

As shown in FIGS. 3A and 3B, the band-type fixing device is installed so as to enclose the file 200 in the guide tube 110, and the band type fixing device is installed in a manner to fix the band type fixing device to the guide tube 110, So that it can be fixed inside the guide tube 110 while ensuring the verticality of the guide tube 110.

As shown in FIG. 3C, the band-type fixing device is formed of two semicircular tubes 310 and 210, and the semicircular tubes 310 and 320 are arranged to enclose the pile 200.

As shown in FIG. 3D, the pile 200 is fixed to the guide tube 110 by using a position fixing member 330 such as a reinforcing bar between the outer circumferential surface of the semicircular tubes 310 and 320 and the inner side surface of the guide tube 110.

4A and 4B, after the pile 200 is fixed to the base 100 for the support structure, the guide tube 110 is closed using the guide tube cap 400 .

As shown in FIG. 4A, the guide pipe cap 400 is formed in a tubular shape having an open bottom and a closed upper surface to cover the upper surface of the guide pipe, and a flange is formed at the bottom to be fixed to the upper surface of the base plate for the support structure.

The grouting material 500 is formed with an injection hole 410 and a discharge hole 420 so that the grouting material can be inserted into the guide pipe cap 400 And to the ground below the foundation 100 for the support structure.

4B, the grouting material 500 may be used to embed and fix the pile 200 in the guide pipe 110 and to prevent the grouting material 500 are press-fitted to reinforce the disturbed ground so that the grouting material 500 is filled in the guide pipe 110 as well.

As such,

First, the guide 200 can be more easily positioned and installed by the guide pipe 110,

Secondly, by using the file 200, it is possible to provide an excellent workability and workability when the foundation is installed on the seabed,

Third, the file 200 is fixed inside the guide tube 110 by using the fixing device 300 inside the guide tube 110 to clarify the load transfer effect,

Fourthly, the grouting material 500 filled in the guide pipe 110 is used to reinforce the disturbed ground by the construction of the pile 200 and to completely integrate the pile 200 with the foundation 100 for the support structure The support for the structure can be used as the foundation for the foundation, and the resistance against the bending mould can be improved, and the punching shear of the support for the structure by the pile can be prevented.

[Manufacturing and Construction Method of Base 100 for Support Structure of the Present Invention]

FIGS. 5A to 5D show in order the steps of manufacturing and mounting the base part of the support structure of the present invention.

First, as shown in FIG. 5A, a foundation 100 for a support structure is manufactured in advance in a land-based manufacturing facility, and is loaded on a barge.

Thus, the ground is formed as a seabed ground, and such a seabed ground is prepared in advance so that the foundation 100 for the support structure can be seated through dredging, sand stone selection, and the like.

The base part 100 for the support structure is lifted by using a marine crane mounted on the barge, and is seated on the seabed ground using its own weight.

Since the guide pipe 110 as described above is installed in the base part 100 for the support structure, the guide pipe 110 is first contacted with the bottom of the sea bed so that the base part 100 for the support structure can be stably It is possible to place it.

5b, when the foundation 100 for the support structure is seated on the seabed ground, the file 200 is guided along the guide tube 110 of the foundation 100 for the support structure using an unillustrated augering apparatus or the like (G) of the seabed.

The pile 200 is constructed so that the tofu is positioned inside the guide pipe 110, and cutting is possible if necessary.

Next, as shown in FIGS. 4A and 4B, the file 200 is fixed inside the guide tube 110 by using, for example, a band-type fixing device.

As described above, the semicircular tubes 310 and 320 may be disposed to surround the pile 200, and then the semicylindrical tube may be fixed to the inside of the guide tube using the position fixing member 330 such as a reinforcing bar.

The position fixing member 330 may be fixed to both the outer circumferential surface of the semicircular tube and the inner surface of the guide tube by welding or the like at both ends.

Next, as shown in FIG. 5C, the guide pipe cap 400 is installed on the guide pipe. The guide pipe cap 400 is installed to seal the guide pipe, and the grouting material injection hole 410 and the discharge hole 420 are formed to allow the grouting material 500 to be press-fitted.

When the grouting material 500 such as cement grout material is press-fitted into the guide pipe cap 400 from which the foreign matter is removed by using a compressor in the barge, the inside of the cap and the disturbed ground The grouting material 500 is press-fitted to reinforce the ground.

When the final grouting material 500 is cured as shown in FIG. 5D, the base part 100 and the pile 200 for the support structure are integrated with each other to complete the base part. In the base part, It is possible to complete the construction of a large structure such as a final offshore wind power generator by installing the tower 10 and mounting the blade 30 and the nacelle 20 on the tower 10.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: base part for supporting structure
110: guide tube
200: File
300: Fixing device
310, 320: Semicircular tube
330: Position fixture
400: guide tube cap
410: injection hole
420: discharge hole
500: Grouting material

Claims (3)

Forming a base part (100) for a supporting structure through which the guide pipe (110) penetrates, and seating the base part (100) on the ground;
Placing the pile (200) on the ground along the guide tube so that the head is positioned inside the guide tube (110);
Fixing the pile (200) inside the guide tube (110) using a fixing device (300); And
A guide pipe cap 400 is installed on the guide pipe 110 to seal the guide pipe and press the grouting material 500 into the guide pipe and the bottom of the base portion of the support structure through the guide pipe cap; Wherein the support structure comprises at least one of the following: The method according to claim 1,
The guide tube 110 is formed so as to protrude downward from the bottom surface of the base for supporting structure,
Wherein the file (200) is a screw file. 3. The method according to claim 1 or 2,
The fixing device 300 includes: a semicircular tube 310 or 320 installed to surround a screw file in a guide tube; And
And a position fixing member (330) installed between the semicircular tube and the guide tube.

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