KR101289426B1 - Constructing method for cantilever structure and cantilever structure constructed by the method - Google Patents

Abstract

The present invention relates to a method of constructing a cantilever structure that can shorten the air of a large structure constructed by a cantilever method and capable of precise construction, and a cantilever structure constructed by this method. Process, a moving part installation step of installing a horizontal moving part on the ground, a lifting part installation step of installing a lifting part above the horizontal moving part and connecting with the loop part, the loop part through a strand jack provided in the lifting part Lifting process for raising to a position corresponding to the engaging portion of the support, a horizontal movement process for moving the lifting portion horizontally through the horizontal moving portion to adjoin the loop portion and the support portion and a fastening process for coupling the loop portion and the support portion Construction method of the cantilever structure characterized in that it comprises a The ball. Therefore, since the roof part and the support part are manufactured at the same time and the coupling is performed through a lifting process, there is an advantage that the air is significantly shortened.

Description

Construction method of cantilevered structure and cantilevered structure constructed by this method {CONSTRUCTING METHOD FOR CANTILEVER STRUCTURE AND CANTILEVER STRUCTURE CONSTRUCTED BY THE METHOD}

The present invention relates to a building structure, and more particularly, to a method of constructing a cantilever structure that can shorten the air of a large structure constructed by a cantilever method while enabling precise construction, and a cantilever structure constructed by this method.

In general, the roof of a large structure is made by constructing a frame with an iron frame on the upper part of the wall and joining the roof to the frame. In general, each frame is combined with each other by combining a standardized frame on the upper part of the wall. The construction is done by covering the roofable members after the installation of the individual frames divided for.

Large structures such as exhibition halls, stadiums, and performance halls emphasize the aesthetic significance of the exterior compared to general residential and business buildings. Recently, large structures having various appearances have been built by the development of building technology and material technology.

Among these structures, cantilever structures are increasingly constructed.

A cantilever structure is a type of structure in which only one side is supported and the other end is protruded. In a structure such as a veranda or a slab of a bridge, a cantilever having a beam shape having one side fixed and the other end having a free end is formed.

Recently, such a cantilever structure is widely applied to a modern structure using steel frame or reinforced concrete, for example, there is an example used for a large structure such as a cantilever bridge.

However, such a cantilever structure has a problem in size due to the structurally weak problem in terms of shear strength and stress and the difficulty of work.

In particular, the cantilever structure is more difficult than the general structure, because the construction process is very difficult, not only excessive material is required to prevent collapse during the construction process, but also requires a lot of time and precision process difficult construction.

The present invention has been made in order to solve the above problems, can be constructed at the same time separately from the roof portion and the support in a large cantilever structure can reduce the construction time can increase the precision of the assembly cantilever structure can be improved It is an object of the present invention to provide a construction method and a cantilever structure constructed by this method.

The construction method of the cantilever structure according to the present invention, the ground production process for producing the roof portion and the support portion at the same time on the ground, a moving portion installation process for installing a horizontal moving portion on the ground, and installing a lifting portion above the horizontal moving portion Lifting part installation process for connecting with the roof portion, a lifting process for raising the loop portion to a position corresponding to the engaging portion of the support portion through the strand jack provided in the lifting portion, by horizontally moving the lifting portion through the horizontal moving portion It provides a construction method of the cantilever structure comprising a horizontal movement step of adjoining the roof portion and the support portion and a fastening process of coupling the loop portion and the support portion. Therefore, since the roof part and the support part are manufactured at the same time and the coupling is performed through a lifting process, there is an advantage that the air is significantly shortened.

In addition, in the construction method of the cantilever structure according to the present invention, the coupling portion of the roof portion and the support portion is produced at a predetermined interval apart on a plane in the sheet manufacturing process. Therefore, by assembling by horizontally moving after lifting, it is possible to precisely assemble by overcoming the errors generated in the process.

In addition, the construction method of the cantilever structure according to the present invention, in the lifting unit installation step, in order to support the unbalanced load of the loop portion, a wire is provided to connect the ground and the lifting unit to provide tension. Therefore, breakage and inclination can be prevented and process reliability improves.

In addition, the construction method of the cantilever structure according to the present invention, in the lifting unit installation step, four lifting portions are provided to support different portions of the loop portion, respectively. Therefore, even load distribution is possible.

In addition, according to the construction method of the cantilever structure according to the present invention, in the lifting step, the strand jack provided in each lifting portion raises the loop portion to a pressure corresponding to the load of each portion. Therefore, a process for minimizing the load while maintaining the horizontal accuracy is possible.

In addition, the construction method of the cantilever structure according to the present invention, in the horizontal moving process, when the roof portion and the support portion is adjacent through the horizontal moving portion through the fine adjustment jack provided in the lifting portion to move the loop portion And close support. Therefore, accurate coupling is possible by correcting the error.

In addition, in the construction method of the cantilever structure according to the present invention, the fine adjustment jack is disposed in the plurality of the lifting portion in the height direction, and individually controlled to the error of the gap between the loop portion and the support portion according to the height of the roof portion. Close while adjusting. Thus, the coupling to the correct position is possible.

In addition, the construction method of the cantilever structure according to the present invention includes a support portion installation step of arranging the support portion so as to correspond to the shape of the loop portion and the support portion on the ground before the ground production process. Therefore, it is possible to maintain the exact horizontal and shape in the manufacturing process on the ground.

In addition, the construction method of the cantilever structure according to the present invention, in the fastening step, the loop portion and the support portion is fastened from the upper end side. Therefore, the coupling is possible while maintaining the load appropriately.

In addition, the construction method of the cantilever structure according to the present invention further includes a measuring step of measuring the deflection of the end side of the loop part while the lifting part releases the support for the loop part after the fastening step.

In addition, the construction method of the cantilever structure according to the present invention, in the measuring step, when the deflection of the end side of the loop portion is larger than a predetermined allowable value, the release process for releasing the fastening of the roof portion and the support portion, the loop portion It may further include a reinforcing process for reinforcing and a re-joining process for recombining the loop and the support. Therefore, if there is a design error or manufacturing error, it is possible to adjust quickly and easily.

On the other hand, the cantilever structure according to the present invention provides a cantilever structure, characterized in that constructed by the construction method, it may further include a rear loop portion disposed to face the loop portion.

In addition, the rear loop part may be manufactured integrally with the support part.

The construction method of the cantilever structure according to the present invention and the cantilever structure constructed by this method have the effect that the air can be significantly shortened because the roof portion and the support portion can be manufactured at the same time.

In addition, since the parts of the structure manufactured separately can be combined while precisely controlling the lifting portion and the horizontal moving portion, the construction cost is reduced and precise and stable coupling is possible.

In addition, when the roof part and the support part are manufactured at the same time and assembled through a lift-up method, since the deflection may be reinforced or rearranged, the accuracy is improved and the effort and cost of the process of correcting the deflection are significantly reduced.

1 is a side view showing a cantilever structure according to the present invention.
2 to 4 is a side view showing a construction method of the cantilever structure according to the present invention.

Hereinafter, the construction method of the cantilever structure according to the concept of the present invention and the cantilever structure constructed by this method will be described in more detail with reference to the drawings.

The cantilever structure 100 refers to a type of structure in which only a part of the cantilever structure is supported with respect to the ground and one end thereof protrudes. As shown in FIG. 1, the cantilever structure 100 is a loop portion constituting the cantilever with the support 120 supporting the entire structure with respect to the ground. 110).

In addition, the cantilever structure 100 may further include a rear loop 130 disposed to face the roof part 110 based on the support part 120, and the loop part 110 may include the support part 120. It may be arranged to surround the outer periphery of.

One end of the roof part 110 is supported by the support part 120 and the other end forms a free end part. In the construction process, since the bias of the load deepens toward the end side of the arrangement direction of the roof part 110. As described above, there is a problem that an excessive member is required for the support and a lot of construction time is required.

In the concept of the present invention, the roof unit 110 of the cantilever structure 100 can be installed at the same time as the support unit 120. The concept of FIG. 2 to FIG. 4 will be described below.

2 to 4 is a side view sequentially showing the construction method of the cantilever structure according to the present invention.

The construction method of the cantilever structure 100 of the present invention is basically a ground production process for simultaneously manufacturing the roof portion 110 and the support portion 120 on the ground, and a moving portion installation process for installing the horizontal moving portion 400 on the ground. And a lifting unit installation process for installing a lifting unit 300 above the horizontal moving unit 400 and connecting the roof unit 110, and a strand jack provided at the lifting unit 300. A lifting step of elevating the part 110 to a position corresponding to the coupling part of the support part 120 and horizontally moving the lifting part 300 through the horizontal moving part 400 and the roof part 110. It includes a horizontal movement step of adjoining the support portion 120 and a fastening process of coupling the loop portion 110 and the support portion 120.

The ground fabrication process is performed at the same time on the ground construction of the support portion 120 and the roof portion 110, the support portion 120 is produced in a manner that is built up from the ground to the upper side with a predetermined shape and height, the roof portion ( 110 is first manufactured on the ground before the progress of the lifting process to be described later.

In the prior art, in order to form a cantilever structure, the construction is generally performed by first constructing the support part 120 forming the main column and extending the cantilever loop part 110 to the other side when the construction of the support part 120 is completed. Because of this, there is a problem that the air is excessively consumed. Note that the construction method according to the concept of the present invention has the advantage that the time required for construction can be remarkably reduced because the roof unit 110 and the support unit 120 are constructed in such a manner that they are separately manufactured and combined at the same time on the ground. shall.

Since the construction method of the cantilever structure of the present invention is more suitable for the construction of a large cantilever structure, the roof part 110 and the support part 120 are separately manufactured on the ground to maintain the shape of the roof part 110 and The roof part 110 and the support part 120 may be manufactured after the support part 200 is first installed on the ground so as to correspond to the shape of the support part 120.

More specifically, the support part 200 is arranged in plurality at predetermined intervals so as to support the bottom surface of the roof part 110 and / or the support part 120 to maintain the shape at the time of manufacture and to facilitate the coupling process. In this case, the height of each support part 200 is made to have a height corresponding to the shape of the bottom surface of the roof part 110 and / or the support part 120 being supported.

However, the support part 200 may selectively support the side or the top surface of the roof part 110 and / or the support part 120.

In addition, the cantilever structure 100 may further include a rear loop part 130 at a position opposite to the roof part 110, and the rear loop part 130 may be formed of the support part 120 as shown in the drawing. It can be constructed together at the time of manufacture, of course, it can be constructed in a manner that is manufactured in the ground, such as the loop portion 110 is coupled later.

When the manufacturing of the roof part 110 and the support part 120 on the ground is completed, the horizontal moving part 400 is first provided on the ground as devices for moving the roof part 110.

The horizontal moving unit 400 is an apparatus for performing the horizontal moving process after the lifting process while supporting the lifting unit 300 on the upper side, and may be driven by hydraulic power means such as a hydraulic jack, but is not necessarily limited thereto. .

Preferably, the horizontal moving part 400 may be configured to move a movable member such as a skidshoe on a skidway such as a concrete mat by a predetermined stroke using a hydraulic jack.

When the horizontal moving unit 400 is fixedly installed on the ground as described above, the lifting unit 300 is installed upward and the lifting unit 300 is connected to the roof unit 110. Specifically, the loop part 110 is connected to a strand jack provided in the lifting part 300.

The lifting part 300 serves as a guide and a support for moving the roof part 110 upward as a kind of jacking leg.

In addition, the lifting unit 300 is formed of a plurality and each supports a different portion of the roof unit 110 to support a high load distribution during the lifting process, the number can be arranged in various ways depending on the selection And four are preferably arranged in consideration of the even support and stability of the load.

The lifting part 300 may be located on the side of the roof part 110, but may be located between the skeletons of the structure of the roof part 110.

Since the roof part 110 is horizontally moved through the process of being transported along the lifting part 300 and goes through a process of being adjacent to the support part 120, the position where the lifting part 300 is disposed is planar. The roof part 110 is made to be spaced apart from the support part 120 by a predetermined distance (l). According to this concept, it is preferable that the roof part 110 is manufactured to be spaced apart from the planar support part by a predetermined interval in the above-described paper making process.

At this time, since the lifting part 300 receives different loads for each of the supporting parts of the roof part 110, a part receiving a rotational moment may occur, and there is a fear of falling or breaking when sufficient rigidity is not guaranteed. . Accordingly, in order to solve this problem, a wire such as a back tie or a gaining wire may be provided to connect the ground and the lifting part 300 to provide tension.

In addition, a tension brace formed at a predetermined portion as a structure by replacing or reinforcing the wire may be further provided in the installation process of the lifting unit 300.

When the lifting unit installation process is completed, a lifting process is performed to raise the roof unit 110 to a position corresponding to the coupling portion of the support unit 120 through a strand jack provided in the lifting unit. You lose.

If the strand jack can lift the lifting unit 300, various lifting devices may be selectively applied.

As described above, the lifting unit 300 may receive different loads for each portion of the lifting unit 300 to be supported, and may incline or exert excessive moments on the lifting unit 300 during the ascending process. Therefore, the strand jack provided in each lifting part 300 may raise the loop part 110 to a pressure corresponding to the load of each part.

When the roof part 110 is raised to a desired height through the above steps, the horizontal moving process is performed because the coupling part of the roof part 110 and the support part 120 is formed at a predetermined distance apart as described above.

The horizontal moving process is performed by the above-described horizontal moving part 400, wherein the horizontal moving part 400 moves the lifting part 300 supporting the loop part 110 to support the loop part 110 and the support part ( 120 may be adjacent or in close contact.

However, since the horizontal moving part 400 horizontally moves the loop part 110 positioned above the lifting part 300, there is a risk of shock due to a process error, so the horizontal moving part 400 is a loop part. The 110 is adjacent to the support 120, and the lifting unit 300 may include a fine adjustment jack (not shown) to adjust the fine adjustment jack to close the loop 110 and the support 120. .

Preferably, the fine adjustment jack is disposed in a plurality in the height direction for supporting the roof portion 110 of the lifting portion 300, are individually controlled to loop portion 110 according to the height of the roof portion 110. ) And the gap between the support 120 can be closely adjusted.

As described above, when the horizontal movement is performed through a two-stage process, there is an advantage that the reliability of construction can be improved in the large cantilever structure 100 having an unbalanced load and at the same time capable of precise movement.

As described above, when the roof part 110 and the support part 120 are in close contact with each other, a fastening process is performed. The fastening process may be various fastening methods such as welding or bolting.

The order of fastening may be made selectively, but it is preferable that the fastening is made from the upper end side of the coupling part in consideration of the distribution of the load. After the fastening of the upper end side may be sequentially performed to the lower side, the fastening may be made while alternately up and down from the outer peripheral side to the inner peripheral side. The order of fastening as described above may be made selectively.

When the fastening of the roof part 110 and the support part 120 is completed as described above, the support by the support part 200 is sequentially released, so that the load of the loop part 110 is completely at the end side of the support part 120. Installation of the cantilever structure 100 is completed by allowing it to be supported. At this time, an end side of the roof part 110 may sag excessively to the ground than an allowable value in the design due to a design error or an assembly problem.

This undesirable offset not only hinders the overall structural aesthetic but also creates unexpected loads or torques throughout the structure, leading to the risk of breakage or serious collapse.

Therefore, the construction method of the cantilever structure of the present invention may further include a measuring step of measuring the deflection of the end side while the lifting unit 300 releases the support of the load to the roof unit 110 after the fastening process. have.

For example, when the cantilever structure is formed in a large size and the loop part 110 is about 85 m, it may be determined that the offset of the deflection of the end side of the loop part 110 becomes 300 mm or more.

Therefore, in the measuring step, if the deflection of the end side of the loop portion 110 is larger than a predetermined allowable value, the release process of releasing the fastening of the loop portion 110 and the support portion 120, the loop portion ( A reinforcing process for reinforcing 110 and a refastening process for recombining the roof part 110 and the support part 120 may be performed.

After the retightening process, the sag again is checked through the measuring process, and if the deflection is within the allowable value, the support of the lifting unit 300 is completely released to complete the process. It will repeat again.

In the prior art, the roof part 110 is formed by extending to one side after the manufacture of the support part 120 is completed. In such a design process, the loop part 110 sags after the installation of the loop part 110 is completed. Since the reinforcement work is very difficult because it can not only measure, but there was a problem that excessive cost is required to adjust this, as in the concept of the present invention, the roof 110 and the support 120 are manufactured at the same time to lift It should be noted that when assembled through reinforcement or repositioning of this deflection, the accuracy is improved and the effort and cost of the process of correcting it are significantly reduced.

On the other hand, when the rear loop part 130 is manufactured at the same time as the support part 120 on the ground, such as the roof part 110, the process of coupling the rear loop part 130 may be combined with the loop part 110. The same thing is omitted.

In addition, the rear loop part 130 may be manufactured integrally with the support part 120.

The construction method of the cantilever structure described above may be applied to various shapes such as an asymmetric cantilever structure or a symmetrical cantilever structure having a two-armed beam shape.

In the foregoing, the present invention has been described in detail based on the embodiments and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the content of the following claims.

100 ... cantilever structure 110 ... loop part
120 ... support 130 ... rear loop
200 ... support 300 ... lifting
400 ... horizontal moving parts

Claims (14)

A ground production process for simultaneously producing a roof portion and a support portion on the ground;
Moving unit installation step of installing a horizontal moving unit on the ground;
A lifting unit installation process of installing a lifting unit and connecting the roof unit to an upper side of the horizontal moving unit;
A lifting step of lifting the loop portion to a position corresponding to the engaging portion of the support portion through a strand jack provided at the lifting portion;
A horizontal moving step of horizontally moving the lifting part through the horizontal moving part to adjoin the roof part and the support part; And
Includes; fastening process for coupling the loop portion and the support portion,
In the horizontal moving process, when the loop part and the support part are adjacent to each other through the horizontal moving part, the horizontal part moves horizontally through a fine adjustment jack provided in the lifting part to close the loop part and the support part,
The fine adjustment jack is disposed in a plurality in the height direction in the lifting portion, and individually controlled to close while adjusting the error of the gap between the roof portion and the support portion according to the height of the roof portion, the construction method of the cantilever structure. . The method of claim 1,
In the ground fabrication process, the coupling portion of the roof portion and the support portion is a construction method of the cantilever structure, characterized in that is produced spaced apart a predetermined interval on the plane. The method of claim 1,
In the lifting unit installation process, the construction method of the cantilever structure, characterized in that the wire is provided to connect the ground and the lifting unit to provide a tension in order to support the unbalanced load of the loop portion. The method of claim 1,
In the lifting unit installation process, the lifting unit is provided with four, the construction method of the cantilever structure, characterized in that to support different portions of the loop portion, respectively. 5. The method of claim 4,
In the lifting process, the strand jack provided in each lifting portion raises the loop portion to a pressure corresponding to the load of each portion. delete delete The method of claim 1,
And a support part installation step of arranging the support part on the ground so as to correspond to the shape of the roof part and the support part before the ground production step. The method of claim 1,
In the fastening process, the roof portion and the support portion is a construction method of the cantilever structure, characterized in that fastening from the upper end side. The method of claim 1,
After the fastening process,
And a measuring step of measuring the deflection of the end portion of the loop portion while releasing the support of the lifting portion from the loop portion. The method of claim 10,
When the deflection of the end side of the loop portion in the measuring step is larger than a preset allowable value,
A release release step of releasing the engagement of the roof portion and the support portion;
Reinforcing step of reinforcing the loop portion; And
Re-fastening step of recombining the loop portion and the support portion; Construction method of the cantilever structure further comprises. A cantilevered structure constructed by the construction method of any one of claims 1 to 5 and 8 to 11. The method of claim 12,
A cantilever structure further comprising a rear loop portion disposed to face the roof portion. The method of claim 13,
The rear loop part, the cantilever structure, characterized in that the manufacturing unit and the integral.

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