KR20060019895A - Extradosed bridge and it's construction method - Google Patents

Abstract

The present invention is to break the simple form of one column tower per uni-cross bridge pier pier of the existing construction of the extra-dose bridge, the technical technology of the creative column tower method and the two-column tower method of the two-column tower per pier direction considering the external aesthetics of the bridge Its purpose is to provide an extra-dose bridge and its construction method that meet the requirements of people, create visual pleasure and open molding beauty when driving a vehicle, and have no economical, structural efficiency and constructability.

According to the present invention for achieving the above object, an extra-dose bridge includes: a pier supporting an upper portion; A head head fixed to the pier; A dweller in which a predetermined number of cantilever segments are continuously coupled to both sides of the head; Two main towers in the axial direction on the main head; A tie beam having a plurality of horizontally installed across the main tower and the main tower; One side is fixedly installed at the tie beam and is characterized in that it is composed of a yarn cable that is fixed to the cantilever segment.

In addition, an extra-dose bridge construction method according to the present invention for achieving the above object comprises the steps of constructing the main head 1 on the pier 1, the main tower 1 on the main head 1 (S1); Hypothesizing the cantilever segment 1 from the lower part of the main tower 1 to both sides, fixing the yarn cable 1 between the main tower 1 and the cantilever segment 1, and tensioning the yarn cable 1 to a predetermined strength (S2); A step (S3) of constructing a side span on the side of the cantilever segment 1, constructing a main head 3 on the pier 3, and constructing a main tower 3 on the main head 3; Hypothesizing the cantilever segment 3 from the lower part of the main tower 3 to both sides, fixing the yarn cable 3 between the main tower 3 and the cantilever segment 3, and tensioning the yarn cable 3 to a predetermined strength (S4); Installing cantilever segments 2 from the lower part of the main tower 2 to both sides on the pier 2, fixing the yarn cable 2 between the main tower 2 and the cantilever segment 2, and tensioning the yarn cable 2 to a predetermined strength (S5). It is characterized by constructing an extra dose bridge by sequentially).

Extra-dose bridge and its construction method

Description

Extradosed bridge and it's construction method             

1 is a conceptual diagram showing an extra dose bridge according to the present invention,

2 is a front view showing a main tower of an extra-dose bridge according to the present invention;

3 is a side view showing a main tower of an extra-dose bridge according to the present invention;

4 is a cross-sectional view taken along the line A-A of FIG.

5 is a front view showing the head of an extra-dose bridge according to the present invention;

6 is a side view showing the head of the extra-dose bridge according to the present invention;

7a to 7f is a construction sequence diagram of an extra dosed bridge according to the present invention.

Explanation of symbols on the main parts of the drawing

10: Pier, Pier 1, Pier 2, Pier 3

20: head tofu, head tofu 1, head tofu 2, head tofu 3

30: dwellingMore

32: cantilever segment, cantilever segment 1, cantilever segment 2,

     Cantilever Segment 3

34: side span

36: key segment

40: pylon, pylon 1, pylon 2, pylon 3

50: tie beam

60: yarn cable, yarn cable 1, yarn cable 2, yarn cable 3

70: removable formwork

B: Extra Dods Bridge

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extra-dose bridge and a construction method thereof, and more particularly to an extra-dose bridge and a construction method thereof, which resists cross-sectional force due to the rigidity of a housing and introduces an opposing eccentric moment into a cable.

In recent years, PSC bridge design has been designed to reduce dead weight, reduce molds, improve construction, economical and maintenance, and harmonize with the features of landmarks and surrounding environment in line with regional characteristics. I put a lot of emphasis on this.

However, it is difficult to introduce a new type of bridge into Korea because the designer's thinking is restricted to the type that ensures stability and economic efficiency, which is documented by experience when selecting a bridge type.

In particular, since the performance data on the bridge type suitable for 100 ~ 200m, which can be called long spans, are weak, the cable-stayed bridge without economics can be applied only by the symbolism or the meaning of elapsed time. Another problem can be highlighted by planning to limit the maintenance of the cross object or increase the cost of subconstruction.

The bridge type that has emerged as an alternative to this problem is the extra-dose bridge.

As described above, the constructed extrads bridge has a problem in that it is inferior to the cable-stayed bridge in the creative formation compared to the efficiency of the structural form in the form of one main column per pier.

Accordingly, the present invention has been made to solve the above problems, to emphasize the unique molding of the extra-dose bridge, to meet the technical requirements of the pylon to satisfy such molding, and to provide visual comfort and The purpose is to provide an open formative beauty, and to provide an extra-dose bridge and its construction method that are economical, structurally efficient, and constructable.

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

1 is a conceptual view showing an extra-dose bridge in accordance with the present invention, Figure 2 is a front view showing the main tower of the extra-dose bridge in accordance with the present invention, Figure 3 is a side view showing the main tower of the extra-dose bridge in accordance with the present invention 4 is a cross-sectional view taken along line AA of FIG. 2, and FIG. 5 is a front view illustrating the head of the extra-dose bridge according to the present invention, and FIG. 6 is a side view illustrating the head of the extra-dose bridge according to the present invention. .

As shown in these figures, the extra-dose bridge B according to the present invention includes: a pier 10 supporting an upper portion thereof; A head head 20 fixedly installed on the piers 10; A housing holder 30 to which a predetermined number of cantilever segments 32 are continuously coupled to both sides of the main head part 20; Two main towers 40 formed in the axial direction on the main head part 20; A tie beam 50 installed horizontally across the main tower 40 and the main tower 40; One side is fixedly installed on the tie beam 50 and is composed of a yarn cable 60 is fixedly installed in the cantilever segment (32).

In other words, the extra-dose bridge (B) according to the present invention is the format of the main tower representing the symbolism of the bridge by breaking the previous form of the one-pier one column tower by adopting the original two-week tower form of the original bridge, It is a unique bridge type that can satisfy both the visual pleasure and open molding beauty at the time of driving by enhancing the symbolism and satisfying the technical requirements of the formative pylon.

Here, the pier 10 is a cross-sectional shape is a structure formed by a wall pier in a streamlined fish shape.

That is, the pier 10 has an excellent shape beauty and symbolism by shaping the slim streamline of the smelt, and has an effect of harmonizing with the upper portion.

 In addition, the main tower 40 is composed of two main towers 40 as a whole and is formed in a shape similar to a fishing rod supporting the shape of the main tower 40.

Here, the design of the main column 40 is to design the cross section by applying the strength design method by the coefficient load, it is regarded as a member receiving the bending moment during the celebration, and the design application by the PM correlation diagram.

In addition, the yarn cable 60 is installed in a cable-like manner, the yarn cable 60 is a structure arranged in a fan or half shape between the tie beam 50 and the cantilever segment (32).

The yarn cable 60 is fixed to the tie beam 50 to resist the tensile force due to the cable tension to the tie beam 50 to prevent the tensile force of the main tower 40.

The tie beam 50 has a merit that it is possible to readjust the tension of the yarn cable 60, unlike the conventional through type.

Hereinafter, the construction of the extra dosed bridge B having the above-described configuration will be described.

7A to 7F are construction flowcharts of the extra-dose bridges according to the present invention.

As shown in these figures, the construction method of the extra-dose bridge (B) according to the present invention constructs the head to head 1 (20) on the pier 1 (10), the main tower 1 on the head 1 (20) Constructing step 40 (S1);

Cantilever segment 1 (32) is hypothesized from both sides of the main tower 1 (40) from the lower side, and between the main tower 1 (40) and the cantilever segment 1 (32) is fixed to install the cable 1 (60), Tensioning the yarn cable 1 (60) to a predetermined strength (S2);

The side span 34 is hypothesized on the side surface of the cantilever segment 1 32, the head head 3 20 is constructed on the pier 3 10, and the main tower 3 40 is formed on the head head 3 20. Construction step (S3);

Cantilever segment 3 (32) is hypothesized from both sides of the main column 3 (40) from the lower side, and between the main column 3 (40) and the cantilever segment 3 (32), fixed cable 3 (60) is installed, Tensioning the yarn cable 3 (60) to a predetermined strength (S4);

Cantilever segment 2 (32) is hypothesized from the lower part of main column 2 (40) on the pier 2 (10), and between the main column 2 (40) and the cantilever segment 2 (32), a cable 2 (60) is provided. The fixed installation is performed to sequentially step (S5) to tension the yarn cable 2 (60) to a predetermined strength to construct an extra-dose bridge (B).

Hereinafter, the extra dose bridge B constructed through the steps as described above will be described by dividing each step.

The step (1) is to construct a head to head 1 (20) on the pier 1 (10), to construct a head tower 1 (40) on the head to head 1 (20), the head to head 1 (20) and the main tower Install the movable formwork 70 on the 1 (40) construction.

Subsequently, in step S2, the cantilever segment 1 32 is hypothesized from the lower part of the main column 1 40, and the steel wire inside the cantilever segment 1 32 is tense, and the main column 1 and the cantilever segment 1 ( 32 and fixed between the yarn cable 1 (60), and tension the yarn cable 1 (60) to a predetermined strength, when the yarn cable 1 (60) tension to prevent the eccentricity in the main column 1 Tension cable 60 is tensioned at the same time.

Subsequently, in step S3, the side span 34 is hypothesized on the side surface of the cantilever segment 1 32, the head head 3 20 is constructed on the piers 3 10, and the head head 3 20. The main tower 3 (40) is installed on the foundation, the foundation and the piers 2 (10) of the main tower 2 (40), the cantilever segment 1 (32) before the key segment 36, and the key segment 36 The side span 34 is hypothesized on one side of the), and the side span 34 is placed on site.

Subsequently, in step S4, the cantilever segment 3 32 is hypothesized from both sides of the main column 3, and the steel wire inside the cantilever segment 3 32 is tensioned, and the main column 3 40 and the cantilever segment 3 ( 32, and securely install the yarn cable 3 (60), tension the yarn cable 3 (60) to a predetermined strength, and install the main head 2 (20) on the pier 2 (10), The main tower 2 (40) is installed on the main head 2 (20), the cantilever segment 3 (32) is hypothesized until the key segment 36, and the side span 34 is hypothesized on one side of the key segment 36. On-site casting of the side span 34.

In step S5, the cantilever segment 2 32 is hypothesized from the lower part of the main column 2 40 on the pier 2 10, and the main tower 2 40 and the cantilever segment 2 32 are interposed between the main column 2 and the cantilever segment 2 32. The cable 2 60 is fixedly installed, the yarn cable 2 60 is tensioned to a predetermined strength, and the key segments 36 are installed on the left and right sides of the cantilever segment 32 and installed on the piers 2 10. Dismantle the mobile formwork (70).

After carrying out the step (S5) to construct an extra-dose bridge (B), the railings, barriers and other auxiliary facilities on the extra-dose bridge (B), and the expansion joint between the starting point and the end connection bridge Add step S6.

Therefore, the extra-dose bridge and the construction method according to the present invention composed of the above-described configuration and construction is possible to the original bridge form considering the role and landscape as a local landmark while securing the span of the existing extra-dose bridge. It has the effect of being consistent with the structure, constructability and maintainability.

As described above, the extra-dose bridge and the construction method thereof according to the present invention have the following effects.

First, the present invention is a bridge type that strengthens the role of the landmark of the region due to its originality, and is a stable bridge with good structural stability, functionality, and durability, and can secure the span length of the existing extra-dose bridge. There is this.

Second, the present invention is a stable bridge with a relatively rich track record in the construction work, there is an advantage that less environmental pollution occurs during construction.

Third, the present invention has the advantage of easy maintenance, easy replacement of bridge bearings and expansion joints, repainting and maintenance.

Fourth, the present invention has an advantage in that it is possible to simultaneously meet the harmony of the visual comfort when driving the vehicle and the surrounding landscape when viewing the bridge.

Claims (11)

A piers 10 supporting the upper portion; A head head 20 fixedly installed on the piers 10; A housing holder 30 having a predetermined number of cantilever segments 32 continuously coupled to both sides of the main head part 20; A main tower 40 having a predetermined number in the axial direction on the main head part 20; A tie beam 50 installed horizontally across the main tower 40 and the main tower 40; One side is fixedly installed at the tie beam 50 and at the same time an extra-dose bridge, characterized in that consisting of a yarn cable 60 is fixedly installed in the cantilever segment (32). The method of claim 1, The bridge 10 is an extra-dose bridge, characterized in that the cross-sectional shape in the axial direction is formed as a wall-shaped piers in a streamlined fish shape, in harmony with the natural environment. The method of claim 1, The main tower 40 is formed of two main towers 40 as a whole and at the same time formed in the shape of the fishing rod holding the shape of the main tower 40, an extra-dose bridge characterized in that it is configured to harmonize with the natural environment. The method of claim 1, The yarn cable (60) is installed in a cable-like manner, an extra-dose bridge, characterized in that the yarn cable 60 is connected between the tie beam 50 and fixed. Constructing the main head 1 (20) on the pier 1 (10) and constructing the main tower 1 (40) on the main head 1 (20) (S1); Cantilever segment 1 (32) is hypothesized from the lower portion of the main tower 1 (40), and between the main tower 1 (40) and the cantilever segment 1 (32), fixed cable 1 (60) is installed, Tensioning the yarn cable 1 (60) to a predetermined strength (S2); The side span 34 is hypothesized on the side surface of the cantilever segment 1 32, the head head 3 20 is constructed on the pier 3 10, and the main tower 3 40 is formed on the head head 3 20. Construction step (S3); Cantilever segment 3 (32) is hypothesized from both sides of the main column 3 (40) from the lower side, and between the main column 3 (40) and the cantilever segment 3 (32), fixed cable 3 (60) is installed, Tensioning the yarn cable 3 (60) to a predetermined strength (S4); Cantilever segment 2 (32) is hypothesized from the lower part of main column 2 (40) on the pier 2 (10), and between the main column 2 (40) and the cantilever segment 2 (32), a cable 2 (60) is provided. The fixed doedoe construction method, characterized in that to carry out the step (S5) to tension the yarn cable 2 (60) to a predetermined strength in order to construct an extra-dose bridge (B). The method of claim 5, The step (1) is to construct a head to head 1 (20) on the pier 1 (10), to construct a head tower 1 (40) on the head to head 1 (20), the head to head 1 (20) and the main tower The construction method of the extra-dose bridge, characterized in that the installation by installing a movable formwork (70) on the 1 (40). The method of claim 5, The step (S2) is a hypothesis cantilever segment 1 (32) from the lower side of the main column 1 (40), tension the steel wire inside the cantilever segment 1 (32), the main column 1 and the cantilever segment 1 (32) Between the cable 1 (60) is fixedly installed between the and the cable 1 (60) to a predetermined strength, both the cable of the cable 1 (60) at the same time 100% characterized in that the primary tension at the same time Bridge construction method. The method of claim 5, In step S3, the side span 34 is hypothesized on the side surface of the cantilever segment 1 32, and the head head 3 (20) is constructed on the pier 3 (10), and on the head head 3 (20). Construct the main tower 3 (40), the foundation of the main tower 2 (40) and the piers 2 (10), the cantilever segment 1 (32) before the key segment 36, the hypothesis of the key segment 36 Temporary construction of the side span 34 on one side, the construction method of the extra-dose bridge, characterized in that the construction by placing the side span 34. The method of claim 5, The step (S4) is a hypothesis cantilever segment 3 (32) from the lower side of the main column 3, the steel wire inside the cantilever segment 3 (32) is tensioned, the main column 3 (40) and the cantilever segment 3 (32) And securely install the yarn cable 3 (60), tension the yarn cable 3 (60) to a predetermined strength, and construct the head head 2 (20) on the pier 2 (10), and the head head. Constructing the main tower 2 (40) on the 2 (20), the cantilever segment 3 (32) is hypothesized until the key segment 36, the side span 34 is hypothesized on one side of the key segment 36, The construction method of the extra-dose bridge, characterized in that the construction by placing the side span 34. The method of claim 5, In step S5, the cantilever segment 2 32 is hypothesized from the lower part of the main column 2 40 on the pier 2 10, and the main tower 2 40 and the cantilever segment 2 32 are interposed between the main column 2 and the cantilever segment 2 32. The cable 2 60 is fixedly installed, the yarn cable 2 60 is tensioned to a predetermined strength, and the key segments 36 are installed on the left and right sides of the cantilever segment 32 and installed on the piers 2 10. An extra-dose bridge construction method characterized by dismantling a movable formwork (70). The method of claim 5 or 10, After carrying out the step (S5) to construct an extra-dose bridge (B), construct a railing, a barrier and other auxiliary facilities on the extra-dose bridge (B), and the expansion joint between the starting point and the end connection bridge An additional dose bridge construction method, characterized in that the addition step (S6) of construction.

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