KR101634717B1 - Structural frame pretension precast middle span void beam and its method of manufacture and construction - Google Patents

Abstract

The present invention pre-casts the pre-tension heavy-weight void beam for a ramen structure into a beam that can be arranged in parallel in at least one column or two or more columns in accordance with the extension of the span, and the pre- And to provide a method for manufacturing a pre-cast precast, mid-diameter void beam, a method for manufacturing the same, and a method for constructing a raymen structure using the same.
In order to accomplish the above object, the present invention provides a pre-tension pre-cast mid-neck void beam for use in a ramen structure, the pre-tension wide-neck void beam comprising a pre-tension heavy-weight void beam, And a hoop reinforcing bar is disposed on the transverse connection part. A spherical space is formed in a predetermined shape at both ends of the pre-tension heavy-weight void beam, a reinforcing bar mounting hole is disposed in the spherical space, And hooks are fixed on the upper surface.
According to another aspect of the present invention, there is provided a method of manufacturing a pre-tension precast mid-radius void beam for use in a ramen structure, the method comprising the steps of: A step of disposing a steel wire (SII); Tensioning the steel wire with a predetermined force P (SII); Installing the mold in a state including the strained steel wire and the reinforcing bar, placing and curing the concrete (S III); And a step (SIV) of demolding the formwork to form a pre-tension precast mid-diameter void beam for a ramen structure.
In order to accomplish the above object, there is provided a method for constructing a raymen structure using a pre-tension precast void beam for a ramen structure according to the present invention, comprising the steps of (S I) assembling and installing columns at regular intervals; Installing a pre-tension precast mid-radius void beam for the ramen structure on said column (SII); Installing a half-half-section slab on the pre-tension precast mid-radius void beam for the ramen structure (S III); And a step (S IV) of forming a slab by placing and curing concrete on the half-half-section slab.

Description

Technical Field [0001] The present invention relates to a pre-cast pre-cast mid-span void beam, a method of manufacturing the same, and a method of constructing a pre-

The present invention relates to a pre-tension pre-cast mid-highway void beam for a rheme structure, a method of manufacturing the same, and a method of constructing a rheme structure using the same.

In general, the construction beams for 10m ~ 15m span are required to improve the degree of freedom for space construction by removing the internal columns of the commercial building. Second, it is necessary for the intermediate multi - use facilities such as swimming pool, gymnasium, It is necessary for the factories, warehouses, and sales facilities that need large space. Fourth, it is necessary to expand the parking space considering the convenience of parking because the vehicle is bigger. Fifth, it is necessary for the facility by the vehicle access. need.

Here, some of the following methods are applied to the conventional method in the case where the free space is required as described above.

1A is an exemplary view showing a steel frame used in a conventional long span implementation.

As shown in this figure, the conventional method using a steel frame is difficult to harmonize with a short reinforced concrete beam having a span of 7 m or less, which is used in the same building due to its high mold height when a steel frame is used at a height of 10 m to 15 m. , And the cost is also high.

1B is an exemplary view showing a composite beam used in a conventional long span implementation.

As shown in this figure, a conventional composite beam method has a disadvantage in that the composite beam can be harmonized with a short reinforced concrete beam having a span of 7 m or less, which is used for the same building, but costs considerably.

1C is an exemplary view showing a truss used in a conventional long span implementation.

As shown in this figure, the conventional truss method has a disadvantage in that it is extremely limited in the use of the truss and is expensive because the height of the truss is so high that it does not fit with the short reinforcing concrete beam of 7 m or less, which is used for the same building.

1D is an illustration showing an arch used in a conventional long span implementation.

As shown in this drawing, the conventional arch-based method has a disadvantage in that its use is extremely limited and its cost is also high because the height of the arch is high and the shape of the short reinforced concrete beam having a span of 7 m or less used in the same building is not fitted.

FIG. 1E is an exemplary view showing a prestressed concrete beam used in a conventional long span implementation.

As shown in this figure, a method using a prestressed concrete beam requires a cone (10) fixing device, and since the mold height is made high for the installation, a short reinforced concrete beam with a span of 7 m or less There is a disadvantage that separate measures are necessary because it is not appropriate, but the cost is cheaper than other methods.

FIG. 1F is an exemplary view showing a reinforced concrete void beam used in a conventional long span implementation.

As shown in this figure, the method using the reinforced concrete void beam reduces the weight of the void beam by removing the concrete in the unnecessary part of the void beam, thereby making the width of the void a short reinforcing concrete beam of 7 m or less However, it is necessary to take additional measures in the section of the void (11), and it is difficult to process the section of the parent beam which is heavy due to the weight of the entire void beam, This method has disadvantages that it is only possible to cast concrete in place because of large dimensional deviation.

On the other hand, the bending moment of the conventional reinforced concrete void beam is changed according to the beam length under the same load condition.

Considering the weight change of the beam according to the change of the length of the unit maximum moment according to the change of the length of the beam, it can be expressed as shown in Table 1 below.

division

7m
(One)
10m
(1.4)
12m
(1.7)
14m
(2)
Remarks
Unit maximum
Momentum amount

1.0
2.2
3.6
5.6
() Is the beam length ratio

As shown in FIG. 2A, the ratio of the maximum momentum 13 and the maximum momentum 12 in the conventional on-site reinforced concrete structure is about 1: 1.2.

Here, if the unit bending moment is converted into the moment moment ratio, it is as shown in Table 2,

division

7m
(One)
10m
(1.4)
12m
(1.7)
14m
(2)
Remarks
Unit maximum
Momentum amount

1.0

2.2
3.6
5.6
() Is the beam length ratio
Unit maximum
Amount of parent

1.2
2.6
4.3
6.7

2b, the maximum moment is increased by about 50%, and the maximum moment is 2.5: 1. Therefore, the maximum moment due to the precast method Table 3 shows the results.

At this time, the precast beam is placed in a state where there is no support to minimize the moment of the moment.

division
7m
(One)
10m
(1.4)
12m
(1.7)
14m
(2)
Remarks
Unit momentum amount
1.5
3.3
5.4
8.4
() Is the beam length ratio
Unit parent value
0.6
1.3

2.2
3.4

As shown in Table 2, when the beam height is constant in the reinforced concrete void beam, which is a method to solve the problem of the mid-bridge beam, the beam width is 10m compared to the 7m beam, 2.2 times for 12m class and 3.6 times for 14m class.

However, since the reinforced concrete structure is the most economical due to the high economic efficiency up to the level of 7m, the reinforced concrete structure is used. As shown in Table 3, when a precast beam such as 10m class reinforced concrete 7m class external dimension is devised, the beam width is 12m Since 2 times of 14m class is sufficient, 3 times of 2 times of 14m class is sufficient. Therefore, when 10m class is arranged in 1 row and 12m class is 2 column and 14m class is arranged in 3 column, the beam width is smaller than that of the void reinforced concrete beam, , And as shown in Table 3, the amount of the parent mandate is smaller than that of the 10m class, and that of the 12m class is 2 times that of the 14m class, which is less than 3 times.

However, when the precast is used, the maximum amount of momentum of the 10m beam is 3 times that of the 7m of the reinforced concrete structure. Therefore, there is a problem in that a precast beam having a structure capable of withstanding this amount of stress is required.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a pre-casting method of pre-casting a void- And the precast beam is designed to balance the weight with other precast members of the same structure. The present invention also provides a method of manufacturing the pre-cast precast super-cast high-mid-beam void beam and a method of constructing the same.

In order to accomplish the above object, the present invention provides a pre-tension pre-cast mid-neck void beam for use in a ramen structure, the pre-tension wide-neck void beam comprising a pre-tension heavy-weight void beam, And a hoop reinforcing bar is disposed on the transverse connection part. A spherical space is formed in a predetermined shape at both ends of the pre-tension heavy-weight void beam, a reinforcing bar mounting hole is disposed in the spherical space, And hooks are fixed on the upper surface.

According to another aspect of the present invention, there is provided a method of manufacturing a pre-tension precast mid-radius void beam for use in a ramen structure, the method comprising the steps of: A step of disposing a steel wire (SII); Tensioning the steel wire with a predetermined force P (SII); Installing the mold in a state including the strained steel wire and the reinforcing bar, placing and curing the concrete (S III); And a step (SIV) of demolding the formwork to form a pre-tension precast mid-diameter void beam for a ramen structure.

In order to accomplish the above object, there is provided a method for constructing a raymen structure using a pre-tension precast void beam for a ramen structure according to the present invention, comprising the steps of (S I) assembling and installing columns at regular intervals; Installing a pre-tension precast mid-radius void beam for the ramen structure on said column (SII); Installing a half-half-section slab on the pre-tension precast mid-radius void beam for the ramen structure (S III); And a step (S IV) of forming a slab by placing and curing concrete on the half-half-section slab.

As described above, according to the present invention, the pre-tensioned precast precast medium voided beam, the method of manufacturing the same, and the method of constructing the rheme structure using the same, The precast beams can be precasted with beams that can be arranged in parallel in two or more columns, and the precast beams are balanced with other precast members in the same building.

FIG. 1A is an exemplary view showing a steel frame used in a conventional long span implementation, FIG.
1B is an illustration showing a composite beam used in a conventional long span implementation,
1C is an illustration showing a truss used in a conventional long span implementation, FIG.
FIG. 1D is an illustration showing an arch used in a conventional long span implementation, FIG.
1E is an illustration showing a prestressed concrete beam used in a conventional long span implementation,
FIG. 1F is an illustration showing a reinforced concrete void beam used in a conventional long span implementation, FIG.
FIG. 2A is a view showing a moment of a conventional on-site reinforced concrete,
FIG. 2B is a view showing a moment of conventional precast reinforced concrete,
FIG. 3A is a plan view showing a state in which two preloaded precast mid-radius void beams for a rumen structure according to the present invention are in close contact with each other,
FIG. 3B is a sectional view taken along line AA in FIG. 3A,
FIG. 3C is a sectional view taken along line BB of FIG. 3A,
FIG. 3D is a plan view showing a state in which three pre-tension precast mid-radius void beams for a ramen structure according to the present invention are in close contact,
FIG. 3E is a sectional view taken along line AA in FIG. 3D,
FIG. 3F is a sectional view taken along line BB of FIG. 3D,
FIGS. 4A to 4D are diagrams illustrating a process of manufacturing a pre-tension precast mid-radius void beam for a rumen structure according to the present invention;
FIG. 5A is an illustration showing an upper half-section effective section of a reinforced concrete void beam, FIG.
FIG. 5B is an exemplary view showing a front end surface effective section of a pre-tension precast beam, FIG.
6A is a cross-sectional view of a pre-tension precast mid-radius voided I-beam for a ramen structure according to the present invention,
FIG. 6B is a cross-sectional view of a pre-tension precast mid-radius void box beam for a ramen structure according to the present invention,
7 is a view showing an installation space of reinforcing bars and reinforcement steel at both ends of a pre-tension precast mid-diameter void beam for a ramen structure according to the present invention,
FIG. 8A is a view showing a polygonal abdomen shape of a pre-tension precast mid-diameter void beam for a ramen structure according to the present invention, FIG.
FIG. 8B is an illustration showing an arc abdominal shape of a pre-tension precast mid-radius void beam for a ramen structure according to the present invention,
FIG. 9 is an exemplary view showing a state in which reinforcement bars for beam-to-beam bonding are arranged after the pre-tension precast mid-diameter void beam for the ramen structure according to the present invention is arranged in parallel;
FIG. 10 is an exemplary view showing a state where a pre-tension pre-casting heavy-weight inter-bolt beam for framing for a ramen structure is installed.
11A to 11E are process drawings showing a process of constructing a ramen structure using a pre-tension precast mid-bridge void beam for a ramen structure according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[Pre-tension precast mid-diameter void beam for framing]

3B is a cross-sectional view taken along the line AA of FIG. 3A, FIG. 3C is a cross-sectional view taken along line BB of FIG. 3A, and FIG. 3D is a cross-sectional view taken along the line BB of FIG. Fig. 3E is a sectional view taken along the line AA in Fig. 3D, Fig. 3F is a sectional view taken along line BB in Fig. 3D, Fig. 5A is a view showing a state in which the reinforced concrete voids Sectional view showing an effective cross-section of the upper end half-section of the beam, Fig. 5B is an example showing a front end effective section of the pre-tension precast beam, Fig. 6A is a cross- Fig. 6 is a cross-sectional view of a pre-tension precast mid-radius void box beam for a ramen structure according to the present invention, Fig. 7 is a cross-sectional view of a pre- FIG. 8A is a view showing an example of a polygonal abdomen portion of a pre-tension precast mid-radius void beam for a ramen structure according to the present invention, FIG. 8B is a cross- FIG. 9 is a view showing a state in which reinforcement bars for inter-beam coupling are arranged after parallel placement of pre-tension precast mid-diameter void beams for a ramen structure according to the present invention Fig. 10 is an exemplary view showing a state in which a pre-tension precast mid-bridge inter-bolt joint reinforcement for a ramen structure is installed.

As shown in these drawings, the pre-tension pre-cast mid-size void beam for a ramen structure according to the present invention is composed of a pre-tension heavy beam intermediate void beam 15, and the center 15 of the pre- And a spherical space 27 is cut in a predetermined shape at both ends of the pre-tension heavy-weighted void beam 15, and a cross- A reinforcing bar mounting hole 25 is disposed in the spherical space 27 and a hook 30 is fixed to the upper surface of the pre-tension heavy-weight void beam 15.

In this case, a steel wire 31 is exposed at both ends of the pre-tension heavy-weighted void beam 15, and the steel wire 31 is subjected to a pre-tension heavy beam 15 having a length (l) The cured retardation epoxy 26 is applied.

The spherical space 27 is cut in a range of 0.05 to 0.15 ℓ of the length of the pre-tension heavy void beam 15 and the inner surface of the spherical space 27 is formed with a shear projection 28 Shear pockets 29 are formed.

That is, the pre-tension precast mid-diameter void beams for the rumen structure according to the present invention are pre-cast into beams capable of being arranged in one column or two or more columns in parallel according to the span length expansion.

At this time, one of the pre-tension precast precast mid-beam void beams for the construction of a ramen is in balance with the other precast elements of the same building.

The finished section of pre-tensioned precast mid-girder void beam shown in FIG. 3 has the same shape as the reinforced concrete void beam section of FIG. 1F, which reduces the weight of unnecessary concrete after assembly.

5, the reinforced concrete beam 16 has an effective cross-section only at the upper half-section, while the pre-tension, as shown in FIG. 5B, The precast beam (17) has an effective cross-section as the effective cross-section becomes 2 times as wide as the effective cross-section of the concrete. The high-strength concrete is 1.5 times higher than the concrete used in ordinary reinforced concrete, Pre-tension pre-casting of 10m-grade raymen structure with a difference of about 10 times can produce a 10m class beam similar to the 7m class by making an I beam for a heavy beam between middle and lower beams. Therefore, there is no problem in arranging and a short reinforcing concrete beam To make harmony.

As shown in Table 3, if the 10m-level beams produced are arranged in parallel at 12m and 2m and 14m at 3m, they can withstand the external force sufficiently.

In addition, when the overhead load increases, the number of parallel arrangements can be increased and arranged.

In addition, the detailed balance adjusts the pre-tension amount and the concrete usage strength to make the most economical beam.

The tension applied to the ribbed structure pre-tensioned precast mid-span void beam is set such that, when the post-tensioning method as shown in FIG. 1e is applied, the cross section of the pre-tension precast mid- (Aka SPC method) was applied so that the beam had a small cross section.

4, the pre-tensioned precast precast mid-radius void beam I beam shown in Fig. 4 makes pre-tensioning the concrete cross-section all the same as the reinforced concrete section 18 of Fig. 5b, (19), compared with that of the reinforced concrete beam, the width of the beam is reduced to reduce the dimensional deviation from the lower column, thereby facilitating the assembly.

The cross-section of the pre-tension precast mid-radius void beam I beam for the ramen structure of FIG. 4 can be made of a box beam as shown in FIG. 6A or as a box beam as shown in FIG. 6B, but the box beam is a separate device And the amount of unnecessary concrete in the abdomen 21 is larger than that of the I beam. In the present invention, the I beam for the pre-tension heavy-weighted void beam for the framing structure of FIG.

4, the I-shaped beam for the pre-tension precast mid-diameter void beam is arranged singly or in two or more rows in accordance with the span width and the superimposed load to form a pre-tension precast mid-diameter void beam for the ramen structure Respectively.

In order to integrate the beams arranged in parallel, one or two places are provided in the central portion and a lateral connection portion 22 is provided at both ends.

A hoop reinforcing bar 23 is disposed at the central connecting portion and a pouring hole 24 for placing the connecting concrete is disposed.

This piercing hole 24 becomes the concrete piercing hole 24 closed at the time of beam assembly.

And a reinforcing bar mounting hole 25 capable of placing a connecting reinforcing bar is disposed at an end thereof.

The pre-tension precast precast at the ends of the pre-cast precast mid-span void beam is applied with a hardening delay epoxy (26) at 0.05 to 0.15 ℓ of the length of the pre- ).

This is a measure to eliminate the unnecessary concrete compressive force in the moment section.

Pre-casting of the ramen structure Pre-casting The pre-casting of pre-cast pre-cast mid-size voided beams at a length of 0.05 ℓ to 0.15 ℓ at the both ends of the voided beam, So that the spherical space 27 is secured.

The shearing protrusions 28 or shear pockets 29 of FIG. 7 are disposed on the inner contact surface of the cut rectangular space 27 so as to be integrated with the secondary concrete.

In this case, the length of the spherical space 27 may be determined to be between 0.05 and 0.15 L so as to sufficiently adhere the influence of the root cause and the reinforcing steel or steel material disposed in the spherical space 27.

The total area A1 of the shear projections 28 is represented by delta kck1 x A1 = delta cck2 x (A-A1)

The overall shear area A2 of the shear pocket 29 is:? Kck1 (A-A2) =?

(δck1 = beam concrete strength, δck2 = secondary concrete strength, A = total shear area, A1 = total shear area of shear projections, A2 = total shear area of shear pockets)

The shapes of the shearing projections 28 and the shearing pockets 29 are various as shown in Fig.

When the secondary concrete is laid simultaneously with the beam assembly for safety during assembly, the reinforcing bars 37 provided on the I beam main body are inserted into the spherical space 27 to arrange the reinforcing bars that can resist the upper surface tension generated in the installation of the slab So that sufficient lap joint length is ensured.

On the upper surface of the beam 15, a hook 30 is formed such that an upper portion of the reinforcing bar necessary for beam production is exposed so that the slab and the slab are easily synthesized.

After the beam 15 is assembled, both ends are formed into a rectangular cross-section having a wide abdomen width, thereby securing a space for installing the tensile steel bars in the right corner. Therefore, it is easy to connect with the substructure when the reinforcing bars are laid. This results in a large compression resistance.

The developed I-Beam for pre-tension heavy casting of the intermediate structure of FIG. 4 has a uniform cross section and the same mold is used. Therefore, it is possible to manufacture it repeatedly in a large quantity by adjusting the length only.

[Pre-tension precast mid-diameter void beam for framing]

Hereinafter, the production of a pre-tension precast mid-radius void beam for a ramen structure according to the present invention will be described.

4A to 4D are process diagrams illustrating a process of fabricating pre-tension precast mid-radius void beams for use in a ramen structure according to the present invention.

As shown in these figures, the pre-tension precast precast mid-radius void beam forming method for a ramen structure according to the present invention is a method for producing a pre-tension precast mid-diameter void beam for a ramen structure, Disposing a steel wire (31) below the reinforcing bar (32); (SII) tensioning the steel wire (31) with a predetermined force (P); A step (SIII) of installing a concrete form including the tensioned steel wire (31) and the reinforcing bar (32), and placing and curing concrete (SIII); And a step (SIV) of demolding the formwork to form a pre-tension precast mid-diameter void beam for a ramen structure.

Here, the pre-tension heavy-weight void beam for the ramen structure is composed of a pre-tension heavy-weight void beam 15, a horizontal joint portion 22 is formed in the center of the pre-tension heavy beam middle beam 15, A hoop reinforcing bar 23 is disposed on the transverse connection portion 22 and a spherical space 27 is formed in a predetermined shape at both ends of the pre-tension heavy-weight void beam 15, And a hook 30 is fixed to the upper surface of the pre-tension heavy-weight void beam 15.

The steel wire 31 is exposed at both ends of the pre-tension heavy-weight void beam 15, and the steel wire 31 is provided with a pre-tensioning bolt beam 15 having a length (l) The cured retardation epoxy 26 is applied.

The spherical space 27 is cut in a range of 0.05 to 0.15 liters of the length of the void beam 15 between the pre-tensioning and the medium-diameter ribs. The inner surface of the rectangular space 27 is formed with a shear projection 28 or a shear pocket 29 do.

That is, in the pre-tension precast precast intermediate void beam forming method for a ramen structure according to the present invention, first, as shown in FIG. 4A, a reinforcing bar 32 and a steel wire 31 are disposed at the bottom.

At this time, the upper exposed portion of the bar reinforcing bar (30) is formed.

Then, as shown in FIG. 4B, the steel wire 31 is tensioned by the force P, and the hardening delay epoxy 26 is applied to the both ends at intervals of 0.05 to 0.15 L, It is possible to freely change the length of the steel wire 31 in the application zone and to prevent the compressive force from being generated in the curing delay epoxy 26 in the application zone concrete.

Then, a mold is installed as shown in FIG. 4C.

At this time, an intermediate transverse connection portion 22 is formed in the form, and when the I beams are assembled, the cut-away portion is formed so as to form the secondary concrete injection hole 24, and the hoop reinforcing bars 23 are exposed to the intermediate transverse connection portion 22 .

And a spherical space 27 of about 0.05 to 0.15 L is formed at both ends so that reinforcing bars for reinforcing the right corner and corrective steel can be installed.

At this time, the inner wall of the spherical space 27 is provided with a shearing protrusion 28 or a front end pocket 29 as shown in FIG. 7 so that the precast beam and the secondary field cast concrete are mechanically coupled to each other.

At this time, the total shear area A1 of the shear projections 28 is? Cd1? A1 =? Cd2 (A-A1) and the total shear area A2 of the shear pockets 29 is? Cd1? (A-A2) =?

(δck1 = beam concrete strength, δck2 = secondary concrete strength, A1 = total area of shear projections, A = total contact area, A2 = total shear pocket shear area).

The shape of the abdomen 21 may be a polygonal shape as shown in Fig. 8A or an arc as shown in Fig. 8B.

The shapes of the shearing projections 28 and the shearing pockets 29 are various as shown in Fig. 7

When the secondary concrete is laid simultaneously with the beam assembly for safety during assembly, the reinforcing bars 37 provided on the I beam main body are inserted into the spherical space 27 to arrange the reinforcing bars that can resist the upper surface tension generated in the installation of the slab So that sufficient lap joint length is ensured

As shown in FIG. 4D, the I-Beam for pre-casting pre-cast heavy-weight intermediate beams for the framing structure of FIG. 4 is manufactured. At this time, the intermediate transverse joint portion 22 is formed with a secondary concrete injection hole 24, 23 are installed.

And a spherical space 27 of about 0.05 to 0.15 L is provided at both ends of the spherical space 27. A shear projection 28 or a shear pocket 29 is provided on the inner wall of the spherical space 27 to form a pre- To be integrated by mechanical coupling.

At this time, the total shear area A1 of the shear projections 28 is? Cd1? A1 =? Cd2 (A-A1) and the total shear area A2 of the shear pockets 29 is? Cd1 Concrete strength, δck2 = secondary concrete strength, A1 = total area of shear projections, A = total contact area, A2 = overall shear pocket shear area).

A reinforcing bars 25 are provided to allow the reinforcing bars 32 to be installed at both ends of the reinforcing bars 32. The reinforcing bars 32 are installed through the beams 15 installed in parallel at the time of installing the beams 15, When concrete is installed on the car, both ends are easily connected.

At this time, the I-beam for the pre-cast precast intermediate-diameter void beam in the ramen structure shown in Fig. 4 is formed as the I-beam for the pre-cast precast medium-sized inter-bolt beam for the framing structure of Fig. 4 in which the compressive force is not introduced in the range of 0.05-1.

[Construction of raymen structure]

Hereinafter, the construction of the ramen structure using the pre-tension precast mid-bridge void beam for the ramen structure according to the present invention will be described.

11A to 11E are process diagrams illustrating a process of installing a ramen structure using a pre-tension precast mid-bridge void beam for a ramen structure according to the present invention.

As shown in these drawings, a method of constructing a raymen structure using a pre-tension pre-cast mid-size void beam for a ramen structure according to the present invention includes steps (S I) of assembling and installing the columns 1 at regular intervals; Installing a pre-tension precast mid-radius void beam for the ramen structure (SII) on said column (1); Installing (S III) a half-half-section slab (35) on the pre-tension precast mid-radius void beam for the ramen structure; And a step (S IV) of forming a slab (40) by placing and curing concrete on the half-half-section slab (35).

Herein, the pre-tension precast mid-diameter void beam for the ramen structure is composed of a pre-tension heavy-weight void beam 15, and a horizontal joint portion 22 is formed in the center 15 of the pre- And a spherical space 27 is formed in a predetermined shape at both ends of the pre-tension heavy-weight void beam 15 and the spherical space 27 is formed in the spherical space 27, And a hook 30 is fixed to the upper surface of the pre-tension heavy-weight void beam 15.

The steel wire 31 is exposed at both ends of the pre-tension heavy-weight void beam 15 and the steel wire 31 is provided with 0.05 to 0.15 liter section of the length (l) of the pre- The cured retardation epoxy 26 is applied.

The spherical space 27 is cut in a range of 0.05 to 0.15 liters of the length of the void beam 15 between the pre-tensioning and the medium-diameter ribs. The inner surface of the spherical space 27 is provided with a shear projection 28 Shear pockets 29 are formed.

11, according to the present invention, the pre-tension precast mid-size void beam for a ramen structure is divided into a ramen structure as shown in Fig. 4 according to the span width and the upper load, Structural pre-tension pre-casting I beams for heavy beam interstices in one row or two or more columns are arranged in parallel and can be used with ordinary reinforced concrete beams.

Therefore, the process of installing and using a pre-tension precast mid-diameter void beam in the structure of ramen can be described as follows.

The column 1 as a substructure is assembled first as shown in FIG. 11A.

At this time, on the upper part of the column 1, a column 1 installed on the column 1 and a reinforcing bar 33 which can be connected to void beams between the pre-tension precast heavy-weight ribs for the ram structure are installed do.

On the column 1, as shown in FIG. 11B, horizontally-installed pre-tension precast intermediate thick-beam void beams are installed in several directions, and if necessary, the pre- Beams, and steel reinforced concrete beams.

That is, a pre-tension precast mid-radius void beam as shown in FIG. 3 using the pretension I beam of FIG. 4 is installed.

11C is a view showing a pre-cast precast mid-radius void beam for a two-row parallel-rail structure.

4, when two rows of pre-tension precast intermediate beams are mounted in parallel, the secondary joint pouring holes 24 are provided in the horizontal connecting portion 22 and the voids 24 are formed in the horizontal connecting portion 22, 20, and the hoop reinforcing bar 23 is subjected to binding treatment.

At this time, the concrete pouring of the horizontal connection portion 22 may precede the pouring, or the pouring of the second half slab concrete may be performed at the same time.

The reinforcing bars 32 of the both-end horizontal connecting portions 22 are also inserted through the reinforcing bars 25 for horizontal connection provided at the both ends of the reinforcing bars 32, or the beams installed in parallel with the parallel fitting at the time of piling the second half- 3 pre-tension precast mid-radius void beam.

3, the half-section slab 35 is installed to close the upper structure, so that safety and subsequent work are smoothly performed.

When the half-half-section slab (35) is installed, the secondary reinforcement is placed.

The additional reinforcing bars are provided with reinforcing bars of the upper reinforcing bar of the upper reinforcing bars of the upper half reinforcing bars of the half-half-section slab (35).

Pre-tension precast for ramen structure Fig. 3 Pre-tension precast for framed structure Pre-tension precast for ramen structure Especially for spherical space 27 installed at both ends when a void beam is installed, The shear resistance at both ends of the beam is improved. However, since the tensile force due to the moment is generated at the upper part of the right corner due to the installation of the slab concrete, it is also used as a space for reinforcing the auxiliary tensile steel (37)

Also, the reinforcing steel material 36 for a non-reinforced concrete structure manufactured as shown in FIG. 10 may be provided, and other reinforcing steel materials may be disposed.

As shown in FIG. 11D, when the secondary concrete is laid on the half-half-section slab 35 after curing the upper reinforcing bars, reinforcing steel, and the like, curing is performed to form a harmonic structure in which all the pre- The construction of the right raymen is completed.

When these methods are stacked vertically, a multi-layered laminate structure is completed.

1: Column 10: Fixing device
11: void 12: maximum parentage
13: maximum momentum 14: maximum momentum
15: Pre-tension precast mid-radius void beam
16: reinforced concrete beam 17: pre-tension precast beam
18: pre-tension pre-cast beam effective section 19: reinforced concrete beam effective section
20: void 21: abdomen
22: horizontal connection portion 23: hoop reinforcing bar
24: Slot 25: Reinforcement hole
26: hardening delay epoxy 27: spherical space
28: shear projection 29: shear pocket
30: Hook 31: Steel wire
32: Rebar 33: Rebar
34: diaphragm 35: half half-section slab
36: Reinforcing steel joints for joining min-jo 37: Reinforcement
40: Slab

Claims (19)

And a void beam (15) between the pre-tension and the mid-beam. A horizontal connecting portion (22) is formed in the center (15) of the pre- A spherical space 27 is formed in a predetermined shape at both ends of the pre-tension heavy-weight void beam 15, and a reinforcing bar mounting hole 25 is disposed in the spherical space 27, A hook 30 is fixed to the upper surface of the pre-tension heavy-weight void beam 15 and both ends of the pre-tension heavy beam 15 are exposed and installed. Characterized in that the hardening delay epoxy (26) is applied in the range of 0.05 to 0.15 ℓ of the length (ℓ) of the void beam (15). delete The method according to claim 1,
Wherein the spherical space (27) is cut in a range of 0.05 to 0.15 ℓ of the length (ℓ) of the void beam (15) between the pre-tension and the mid-width of the pre-tension medium. The method according to claim 1,
And a shearing protrusion (28) or shear pocket (29) is formed on an inner side surface of the spherical space (27). The method of claim 3,
And a shearing protrusion (28) or shear pocket (29) is formed on an inner side surface of the spherical space (27). And a void beam 15 between the pre-tension and the mid-beam. The void beam 15 has a horizontal connection part 22 formed at a center of the pre-tension heavy beam 15 and a hoop reinforcing bar 23 attached to the horizontal connection part 22. [ A spherical space 27 is formed in a predetermined shape at both ends of the pre-tension heavy-weight void beam 15, a reinforcing bar mounting hole 25 is disposed in the spherical space 27, The present invention relates to a method of manufacturing a pre-cast precast super-cast high-mid-width void beam having a crown 30 fixed on the upper surface of a void-heavy beam 15, (S I); (SII) tensioning the steel wire (31) with a predetermined force (P); A step (SIII) of installing a concrete form including the tensioned steel wire (31) and the reinforcing bar (32), and pouring and curing concrete (SIII); And forming a pre-tension precast mid-radius void beam for the ramen structure by demolding the formwork. delete The method according to claim 6,
And the steel wire (31) is exposed and installed at both ends of the pre-tension heavy-weight void beam (15). The method according to claim 6,
Wherein the steel wire (31) is coated with a hardening delay epoxy (26) in a range of 0.05 to 0.15 liter of the length (l) of the pre-tension heavy-weight void beam (15) Way. The method according to claim 6,
Wherein the spherical space (27) is cut in a range of 0.05 to 0.15 ℓ of the length (ℓ) of the void beam (15) between the pre-tension and the mid-width of the pre-tension medium. The method according to claim 6,
Wherein the inner space of the spherical space (27) is formed with a shear projection (28) or a shear pocket (29). 11. The method of claim 10,
Wherein the inner space of the spherical space (27) is formed with a shear projection (28) or a shear pocket (29). A step (S I) of assembling and installing the columns (1) at regular intervals;
And a pre-tension heavy-weight void beam (15) on the column (1), wherein a horizontal connection portion (22) is formed in a central portion (15) of the pre- And a reinforcing bar 25 is installed in the spherical space 27. The reinforcing bar 25 is inserted into the reinforcing bar 25 through the reinforcing bars 25, A step (SII) of installing pre-tension precast precast mid-radius void beams for the ramen structure in which the hooks (30) are fixed on the upper surface of the pre-tension heavy-weight void beam (15);
Installing (S III) a half-half-section slab (35) on the pre-tension precast mid-radius void beam for the ramen structure;
And a step (SIV) of forming a slab (40) by pouring and curing concrete on the half-half-section slab (35). The method of claim 1, wherein the pre- . delete In the thirteenth aspect,
And a steel wire (31) is exposed and installed at both ends of the pre-tension heavy-weight void beam (15). A method for constructing a raymen structure using a pre-cast precast mid-bridge void beam. 16. The method of claim 15,
Wherein the steel wire (31) is coated with a hardening delay epoxy (26) in a range of 0.05 to 0.15 liters of the length (ℓ) of the pre-tension heavy-weight void beam (15) Method of construction of used raymen structure. 14. The method of claim 13,
Wherein the spherical space 27 is cut in a range of 0.05 to 0.15 ℓ of the length (ℓ) of the void beam 15 between the pre-tension and the medium-thickeners. The pre- . 14. The method of claim 13,
And a shear protrusion (28) or shear pockets (29) are formed on the inner surface of the spherical space (27). 18. The method of claim 17,
And a shear protrusion (28) or shear pockets (29) are formed on the inner surface of the spherical space (27).

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