KR101533379B1 - Girder for rahmem structure using side wall with vertical tendon and the construction method therefor - Google Patents

Abstract

The present invention relates to a Rahmen structure using a vertical tendon member and a construction method thereof capable of constructing a precast Rahmen structure by sequentially constructing a bottom plate, both walls, and a girder for a Rahmen structure after excavation of the ground by a cut and cover method. The girder for a Rahmen structure comprises: a horizontal beam having vertical tendon holes in both ends respectively; a lower end flange to form a lower plate in the end of the girder for a Rahmen structure; and an upper center flange to form an upper plate of the girder for a Rahmen structure. A bending negative moment occurs in the center by a vertical tendon member mounted on the upper surface of a horizontal beam after tension as passing through a vertical tendon hole of the horizontal beam while the horizontal beam is supported by the upper surface of both walls.

Description

TECHNICAL FIELD [0001] The present invention relates to a rheme structure using a vertical torsion material and a construction method thereof,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rheme structure using a vertical tensional material and a method of construction thereof. More specifically, the present invention relates to a raymen structure using a vertical tensional material, for example, after a ground is tentered and then a girder for both walls and a ramen structure is sequentially installed to construct a precast ramen structure, and a construction method thereof.

Conventionally, a box structure installed in the ground is generally composed of a bottom plate, a wall, and an upper plate.

The bottom plate is usually constructed so as to have a predetermined thickness by in-situ concrete pouring. In general, the two walls are first installed, and then the concrete is installed between the lower portions of the walls.

The two walls are constructed in such a manner that a plurality of wall segments are connected to each other in the construction direction (longitudinal direction) of the box structure.

At this time, it can be seen that the roof is installed on the upper part of the wall, and then it is finished with the cast concrete.

1a and 1b are constructed to include a bottom plate 10, a wall 20 and a top plate 30 as a construction project of a conventional precast box structure.

That is, as shown in FIG. 1A, the wall 20 is configured to include the body 21 and the column support 22,

It can be seen that the column support portion 22 under the body portion 21 can be changed in accordance with the longitudinal length of the body portion 21 but two are formed to be spaced apart from each other but formed in a rectangular parallelepiped block shape.

It is understood that a reinforcing bar 23 is formed on the bottom of the body 21 so as to extend to the lower space S formed by the bottom of the body and the column support 22.

That is, when the bottom plate 10 is installed with the cast-in-place concrete, the cast-in-place concrete is poured into the lower space S in the lower part of both walls so as to be filled with the formwork. When the cast- So that the wall 20 can be made stronger while being completely synthesized by the inner reinforcing bar, so that the lower wall is strong against the bottom plate.

And a compression member such as a tension member 24 is used for longitudinal connection with the body portion 21 of the wall, which can be referred to as the upper portion of the wall.

2b, a through hole 25 is formed in an outer rib formed at a connection portion of the wall portion 21, a tension member 24 is installed to penetrate the through hole, and the tension member is tightened to fix the wall. Direction.

The reinforcing bars extending from the upper surface of both walls are arranged to be bent on the upper part of the precast upper plate 31 and the upper plate concrete 32 is laid thereon So that the upper plate 30 is formed.

However, in the conventional precast box structure, since the upper plate and the both walls are stronger than each other, a bending moment is generated in the right corner. If the bending moment is not reduced, there is a limit to optimization of the top plate and both wall sections.

Accordingly, the present invention minimizes the bending moment generated in the right corner of the ramen structure, thereby optimizing the cross-section of the girder for both walls and the ramen structure, thereby providing a more efficient and economical vertical ramp structure and a construction method thereof To solve the problem.

In order to achieve the above technical object

First, a vertical tensional material is installed on the upper surface of the wall so as to have an outer eccentric distance, and a lower end of the wall trough forms an opening so that the lower end of the vertical tensional material is exposed.

Vertical torsion holes formed in the horizontal beams of the girders for the raymen structure located above the upper surface of the walls of the two walls are passed through the vertical torsion material so that the upper end of the vertical torsion beams is exposed on the upper surface of the horizontal beams. If the lower end of the vertical tensional material is fixed at the lower end of the wall and the upper end is fixed after being tensioned, a flexural moment is generated in the girder for the ramen structure and a flexural moment is generated in the both walls.

Second, if the upper and lower girder bridges are strengthened with each other in this state, bending moment is generated in the girder for the ramen structure and bending moment is generated in the both walls. The bending moment of the girder for the ramen structure introduced by the vertical torsion material and the bending moment of the girder for the ramen structure introduced during the ramming process are canceled each other and the bending moment of the both walls introduced by the vertical torsion material The bending moments of both walls introduced in the process are canceled, and it becomes possible to fabricate girders for both walls and ramen structures with optimized cross section.

Third, the girders for both walls and the ramen structure are manufactured by precast method, the walls are integrated with the bottom plate, and the girder for the ramen structure has the inverted T-shaped cross-section at the both ends and the T- And it is beneficial for the cross-sectional efficiency of the girder for the ramen structure and for the pouring of the right-hand concrete.

Fourth, in the case of both walls, the wall vertical reinforcement is formed on the upper side of the lower step and the wall horizontal reinforcement is drawn out on the outer side of the upper step, so as to be embedded in the right side concrete C1, and the slab reinforcement is connected to the wall vertical reinforcement, So that the upper portion of the center upper flange of the girder for bending structure is bent. In addition, the upper portion of the upper step and the upper surface of the lower step are formed in a bent shape. Also, the bottom wall reinforcing bars connected to the bottom plate are pulled out from the bottom surface of the body portion of both walls.

Therefore, the two walls of the present invention are manufactured by the pre-casting method, and the vertical tensile force is extended from the upper surface to the bottom of the opening so that the vertical tensile force P So that a bending moment can be generated.

The precast raymen structures constructed according to the present invention can utilize the optimized pre-cast walls and the girders for the rame structures by maximizing the cross-sectional force generated during the raising process.

In addition, the bottom plate under both walls can be formed by using spotted concrete, and the rudder part can be structured efficiently by integrating the girders for both walls and the ramen structure.

In addition, the girder for the raymen structure is formed to have an inverted T-shaped cross-section having a T-shaped cross-section and a horizontal beam at both ends so as to facilitate the construction of the right corners. And is formed into a top surface structure that facilitates integration by pouring.

This makes it possible to construct girders for both walls and raymen structures with minimal weight, which makes it possible to construct more economical raymen structures.

In addition, both walls are made to have an optimized cross-section, but vertical tensions are arranged so as to secure a sufficient vertical tension.

Figs. 1a and 1b show the construction of a conventional box structure,
FIG. 2A is a perspective view of a girder for a rheme structure using the vertical tensional material of the present invention,
Figure 2b is a perspective view of the wall of the present invention,
FIG. 2C and FIG. 2D are views showing a combined structure of a girder and a wall for a rhamment structure using the vertical tensional material of the present invention,
FIGS. 3A and 3B are flowcharts of a method of constructing a rheme structure using the vertical tensions of the present invention,
FIGS. 4A, 4B and 4C are views illustrating the operation of the girder and both walls for the rumen structure using the vertical tensions 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.

[Girders (100) for Raman Structures Using the Vertical Tension Material (150) of the Present Invention)

2A shows a perspective view of a girder 100 for a rheme structure using a vertical steel bar according to the present invention.

The girder 100 for the ramen structure includes a horizontal beam 110, an end bottom flange 120, a central upper flange 130, a taper flange 140, and a vertical tautness 150.

The horizontal beam 110 is a beam having a height greater than the width, and has an extension length L. In the case of FIG. 2, one horizontal beam 110 is formed.

These horizontal beams are formed with vertical tensile material holes 111 at both ends.

The central upper flange 130 is formed to extend on both sides of the horizontal beam 110 to form an upper plate of the girder 100 for a ramen structure and has an extended length L1 excluding both ends as a plate member.

That is, it is formed as a horizontal plate member so as to extend to both sides of the center of the horizontal beam 110 and has an extension length L1 to constitute an upper plate of the girder 100 for a ramen structure.

The end lower flange 120 constitutes an end plate of the girder 100 for the ramen structure and also has an extending length L3 from the end face of the receiving beam 110 as a plate member toward the center.

That is, the horizontal plate member is formed so as to have an extended length L3 from the end face of the water injection beam 110 toward the central portion, thereby forming the end plate of the girder 100 for the ramen structure.

The inclined flange 140 is an inclined plate connecting the ends of the end lower flange 120 from the end of the central upper flange 130 and is inclined at the side of the vertical beam 110. The inclined flange 140 is also a plate member, And an extended length L2 between the end lower flanges.

That is, a slanting plate member having the same width as the end lower flange and the upper center flange is formed to have an extended length L2 between the end of the central upper flange 130 and the inner end of the end lower flange 120, Thereby constituting an inclined flange of the girder 100.

Thus, it can be seen that the girder 100 for the ramen structure has a T-shaped cross-section with a central upper flange and a horizontal beam, and an inverted T-shaped cross-section with both horizontal beams and end lower flanges.

The vertical tensional material 150 is installed to penetrate the vertical tensional material hole 111 of the horizontal beam 110 and extends from the upper surface of the two walls 200 to be described later so that the girder 100 for the rim structure is connected to the vertical tensional material 150 So as to be supported on the upper surface of the wall.

The horizontal beams 110 formed at both ends of the girder structure 100 for the ramen structure are formed with the inclined flanges 140 and the horizontal beam reinforcing bars 112 extended to the upper surfaces of the end portion lower flanges 120.

[Double Wall Body 200 for Girders 100 for Raman Structures Using the Vertical Tension Material 150 of the Present Invention]

FIG. 2b is a perspective view of the wall of the present invention, and FIGS. 2c and 2d illustrate a combined structure of a girder and a wall for a rhamment structure using the vertical tensions of the present invention.

The girder 100 for the ramen structure may include a horizontal beam 110, an end lower flange 120, a center upper flange 130, a slope flange 140, and a vertical tension member 150, as shown in FIG. .

As shown in FIG. 2B, the wall 200 is manufactured by a pre-cast method. The wall 200 and the bottom plate 300 to be described later are brought into tight contact with each other.

Since the bottom plate and the two walls are structurally integrated due to these rigidities, the earth pressure and the bending moment due to the self weight are dispersed to both the walls and the bottom plate.

The two walls 200 are formed of a body 210 and a column support 220 as shown in FIG. 2B for the purpose of strengthening the bottom plate 300 and the wall 200. The openings S1 are formed between the column supports 220, Is formed.

Accordingly, it is preferable that the column supporting part 220 is formed simply by opening the lower end of the wall part.

Further, a vertical tension member hole 230 is formed to penetrate the bottom surface and the upper surface of the body 210.

At this time, the upper surface of the body 210 is formed with the steps A1 and A2 so that the vertical tensile material holes 230 are formed on the lower stepped surface A2 so as to maximize the eccentric distance e from the neutral axis of the wall. So that the wall vertical reinforcement 241, the wall horizontal reinforcement 242, and the tentering reinforcement 244 can be extended sufficiently.

The horizontal beam 110 of the girder structure 100 is supported on the upper surface A11 of the upper step A1 of the wall 200 as shown in FIGS. 2c and 2d, The position of the girder 100 for the ramen structure is set so that the tensile material hole 111 is spaced upward and downward from the vertical tensile material hole 230 of the body portion.

As shown in FIGS. 2B and 2C, both walls 200 are constructed such that a wall vertical reinforcement 241 is drawn on the upper side of the lower step and a wall horizontal reinforcement 242 is drawn on the outer side of the upper step, And the slab reinforcement 243 is welded to the wall vertical reinforcement 241 so that the reinforcement 243 is bent over the upper surface of the center upper flange 130 of the girder 100 for the ramen structure.

In addition, the upper portion of the upper step and the lower step are formed with a bent portion reinforcing bar 244 in a bent shape.

The bottom wall reinforcing bars 245 connected to the bottom plate 300 are also pulled out from the bottom surface of the body portion 210 of both walls 200.

The two walls 200 according to the present invention are manufactured in a precast manner so that the vertical tensions 150 extend from the upper surface to the bottom of the openings S1, So that a bending moment due to the vertical tension force P can be generated over the entire height.

[Method of constructing a rhenian structure using the vertical taut material 150 of the present invention]

3A and 3B illustrate a method of constructing a girder 100 for a rumen structure using a wall 200 having the vertical tensional material 150 according to the present invention. Referring to FIG.

First, as shown in FIGS. 3A and 3B, the site where the underground box structure A can be installed is torn (not shown), and the two walls 200 are installed so as to be spaced laterally from each other, As shown in Fig.

The side walls of the both walls 200 are formed in the shape of a groove on the side of the body so as to be engaged with each other in the form of a shear key / shear groove, and the other side is formed as a protruding portion.

After the walls 200 are provided so as to be in contact with each other in the longitudinal direction, the girder 100 for a ramen structure according to the present invention prepared in advance is placed between the upper surfaces of the walls. So that the bottom ends of both end portions of the vertical beam 110 constituting the girder 100 for the ramen structure are supported on the upper surface of the wall portion,

A girder 100 for a ramen structure is provided so that a vertical tensile material hole 111 formed in the horizontal beam 110 of the girder 100 for girder structure is spaced upward and downward from the body vertical tongue hole 230 of the both walls 200, As shown in FIG.

As shown in FIG. 4, a flexural moment (+ M1) and a flexural moment (-M1) are generated in the girder structure 100 for the ramen structure due to its own weight. The lower end of the vertical torsion member 150 is fixed to the lower surface of the body portion 210 so that the upper end of the vertical torsion member 150 is extended from the upper surface of the body portion, 100 are inserted into the vertical tautions 150 and supported on the upper surface of the walls. So that the upper end of the vertical tension member 150 is pulled out on the upper surface of the girder 100 for the ramen structure.

Next, as shown in FIG. 2C, FIG. 4A, FIG. 4B and FIG. 4C, when the upper end of the vertical tension member 150 is stretched and then fixed on the upper surface of the horizontal beam 110 by using a fixing nut, It can be seen that the vertical tension force P is generated over the entire height of the two walls 200 while the girders 100 for the structures are connected to each other.

This results in a bending moment (-M2) due to the eccentricity (e) in the girder structure 100 for the rumen structure due to the vertical tension force P and a bending moment (+ M2) in the both walls.

In other words, according to the present invention, when the girder 100 for the rumen structure is installed on the upper surface of the wall 200, the vertical tensional material 150 is kept in a state where it is not attached to the wall, The lower end of the vertical torsion bar is fixed at the upper end of the previous wall so that the upper torsion is fixed and the bending moment is generated particularly in the both walls by the vertical torsion across the entire height of the wall. So that no bending moment is generated at the top of both walls.

As described above, the slab reinforcement 243 is welded to the vertical reinforcing bars 241 drawn on the upper surface of the lower step of the two walls 200, so that the upper reinforcing bars 241 are welded to the upper surface of the upper central flange 130 of the girder 100, .

Next, as shown in FIG. 3B, the horizontal beam 110, the wall vertical reinforcement 241, the wall horizontal reinforcement 242, the slab reinforcement 243, and the remainder reinforcing bar 244 of the horizontal beam 110 are horizontally The concrete portion C1 is inserted into the end portion lower flange formed at both ends of the beam to form a right angle portion so that the spiral portion 500 protrudes from the back surface of the right corner portion so that the girder 100 and the body portion 210 ).

At this time, the right-angled concrete (C1) is placed together with the upper-plate concrete (C2) formed to have a constant thickness on the upper surface of the upper center flange.

When the girder for both walls and the ramen structure are strengthened by the concrete (C), the flexural moment (+ M3) occurs in the girder for the ramen structure and the flexural moment (-M3) occurs in both walls (-M2) of the girder for the ramen structure introduced by the vertical tension member 150 and the bending moment (+ M2) of the both walls are canceled.

The present invention is characterized in that the amount of bending moment (-M2) of the girder (100) for a ramen structure generated by the vertical tensional element (150) and the bending moment It is possible to reduce the weight by optimizing the cross section of the walls 200 and the girder 100 for the ramen structure by controlling the installation of the girder 100 and the bending moments occurring in the right concrete portion C, The construction (A) becomes possible.

When the bottom plate 300 is formed by the concrete by the casting so that the wall lower reinforcing bars 245 exposed between the column supporting portions 220 of the both walls 200 are buried and the final box structure A is constructed, When the structure A is filled up, the underground box structure A is completed. So that the bottom plate 300 and the wall 200 also have an effect of being strong.

In addition, the wall 200 is formed by pouring an end portion lower flange formed at both ends of the horizontal beam so that the tearing reinforcing bars 244 are embedded, so that the tearing portion 500 is projected on the back surface of the right corner portion Thereby facilitating the construction of the connecting slab.

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: bottom plate 110: horizontal beam
111: vertical tensile material hole 112: horizontal beam reinforcement
120: end bottom flange 130: center upper flange
140: inclined flange 150: vertical tension material
200: wall 210: body
220: column support portion 230: vertical tension member hole
300: bottom plate A: box structure

Claims (9)

A horizontal beam 110 having a beam length greater than the width and having an extension length L formed at both ends of the vertical tension hole 111;
An end lower flange 120 which is formed as a horizontal plate member and has an extending length L2 from the end face of the water beam 110 toward the center thereof to form an end plate of the girder 100 for the ramen structure; And
And a central upper flange 130 formed to extend on both sides of the center of the horizontal beam 110 and formed to have an extended length L1 to constitute an upper plate of the girder 100 for the ramen structure, ,
The vertical tensional material 150 is inserted into the vertical tensional hole 230 of the wall while the horizontal beam 110 is supported on the upper surface of the wall 200. The lower end of the vertical tensional material 150 is fixed to the bottom of the wall, The upper end of the horizontal beam 110 passes through the vertical torsion hole 111 and is then fixed on the upper surface of the horizontal beam 110 so that the vertical tension member 150 generates a bending moment,
The girders for the ramen structure are formed to have an extended length L3 between the end of the central upper flange 130 and the inner end of the end lower flange 120 as a sloped plate member having the same width as the end lower flange and the central upper flange A horizontal beam 110 formed at both ends of the girder 100 for the ramen structure is connected to the inclined flange 140 and the inclined flange 140, And a horizontal beam reinforcing bar (112) extending to the upper surface of the end lower flange (120) is formed. delete The method according to claim 1,
The two walls 200 are formed of a body 210 and a column support 220 at the bottom of the body so that an opening S1 is formed between the pillars 220. The bottom and top of the body 210, By allowing the vertical tautening holes 230 to be formed to pass therethrough,
The vertical torsion coil 150 is inserted into the vertical torsion hole 230 and the lower end of the vertical torsion coil 150 is fixed to the bottom of the body 210. The upper end of the vertical torsion coil 150 passes through the vertical torsion hole 111 of the horizontal beam 110, So that a bending moment is generated in both walls by means of a vertical tensioning material over the entire height of the wall. The method of claim 3,
The upper tier A1 and the lower tier A2 are formed on the upper surface of the body 210 so that the vertical tangent hole 230 is formed in a lower stepped surface A2 So as to generate a flexural moment which is sufficient to secure a space in which the wall vertical reinforcement 241, the wall horizontal reinforcement 242 and the tearing reinforcing bar 244 can be formed Raman structures. The method of claim 3,
And a bottom plate (300) is further formed by the pouring concrete so that the wall lower reinforcing bars (245) exposed between the column supporting portions (220) of the both walls (200) are embedded. (a) installing both walls 200 to which side faces are connected to each other;
(b) installing the girder (100) for the ramen structure of claim 1 on the upper surface of the wall;
(c) stretching the vertical tension material 150 on the upper surface of the horizontal beam after passing through the vertical tensioner hole 111 of the horizontal beam located above the upper surface of the wall 200;
(d) a step of bridging the girder (100) and both walls of the ramen structure using the right-angle concrete (C1) A Method of Construction of Raman Structures Using Vertical Tension. The method according to claim 6,
The method of claim 1, wherein the side walls of the walls (200) are formed in a shear or shear shape, and are engaged with each other. The method according to claim 6,
The right-angled concrete C1 in the step (d) includes the horizontal beam reinforcement 112, the wall vertical reinforcement 241, the wall horizontal reinforcement 242, the slab reinforcement 243, The girder 100 for the ramen structure is formed by forming the end portion lower flange formed at both ends of the horizontal beam so that the spiral portion 244 is embedded in the lower portion of the horizontal beam, And the body part (210). 9. The method of claim 8,
The right concrete (C1) is placed together with a top plate concrete (C2) formed to have a constant thickness on the upper surface of the center upper flange, and the right concrete is made of a top plate concrete C2 ) With a vertical tensional material .

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