KR100975539B1 - Steel box continuous bridge with irruglar span or regular span and this construction technique - Google Patents

Abstract

The present invention is a bridge corresponding to a portion corresponding to a large tensile stress in the upper section of the parent cement section 30 of the continuous bridge steel box continuous bridge having an inequality soy sauce consisting of L1 (just soy sauce) section and soy sauce soy sauce L2 The sections between 0.01 (L1 + L2) / 2 and 0.16 (L1 + L2) / 2 on both sides of L1 (Long Soy Sauce) and L2 (Long Soy Sauce) centered on the center point of the base are composed of closed cross section 40. Asymmetrical cross section where (0.08 ~ 0.16) L2 / 2 sections are closed in the liver L1 section, and (0.08 ~ 0.16) L1 / 2 sections are closed in the L2 section, which is long liver, and longer longer in the L1 section. The upper flange 12 and the upper flange (20) of the upper flange 12 of the parent cement section 30 other than the closed flange section 40, the upper flange 12, which are closed asymmetrically in the parent section (30). 12 is composed of an opening end surface 50 to which the truss-shaped horizontal bracing 52 is attached, and the parent bar section 30 upper bar. The pre-stress is introduced into the plate slab (70), and the compressive stress of the lower flange of the parent cement section (30) is large and centers around the center point of the bridge bearing. On both sides, 0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) / 2 sections are constructed by pouring high-strength concrete, but (0.16 ~ 0.32) L2 / 2 sections are synthesized by pouring L1 sections, which are soy sauce. In the L2 section, the (0.16 to 0.32) L1 / 2 section is poured and synthesized by asymmetrical cross-sections that are put into L1 (single soy sauce) sections for a longer period of time, and the moment in the upper flange 12 of the parent section 30 The upper flange 12 steel and the bottom plate slab 70 closed in an asymmetrical cross section according to the stress are prestressed to the tensile stress, and the upper end of the closed cross section 40 closed in an asymmetrical cross section in the parent section 30. Upper flange 12 of parent section 30 other than flange 12 In the upper flange 12 of the constant moment section 20 is formed by the opening end surface 50 to reduce the steel requirements, the lower flange of the parent moment section 30, the moment like the upper flange 12 closed in an asymmetric cross section The purpose of the present invention is to provide a continuous steel box bridge and a construction method thereof having an unequal length of steel, which reduces steel requirements by 20% to 40% by coping with high-strength concrete with asymmetrical cross sections according to stress.
Steel box continuous bridge having an inequality soy sauce in accordance with the present invention for achieving the above object is an upper flange arranged horizontally between the upper part of the abdomen 10 and the upper part of the abdomen 10 at regular intervals A continuous bridge steel box girder (G) having an uneven soy sauce having different lengths of the soy sauce, each consisting of a lower flange (12) and a lower flange arranged horizontally between the lower left and right sides of the abdomen (10), wherein the girder (G) Is an inequality sheet consisting of a positive moment section 20 and a parent moment section 30 according to a portion where a positive (+) bending moment and a negative (-) bending moment occur in the girder G in a state where In the steel box continuous bridge having a, the upper flange 12 of the parent cement section 30 of the steel box continuous bridge having the inequality soy sauce L1 (single soy sauce), L2 (long soy sauce) around the center point of the bridge support 0.08 (L1 + L2) / 2 on both sides of the interval Section 0.16 (L1 + L2) / 2 is formed with the closed cross-section 40, but in the L1 section, which is only soy sauce, the (0.08 ~ 0.16) L2 / 2 section is closed, and in the L2 section, which is long liver, (0.08 ~ 0.16) L1 The / 2 section is closed and closed in an asymmetric cross section that is closed longer in the L1 (only soy sauce) section, and the parental section 30 other than the upper flange 12 of the asymmetric closed section 40 of the parent section 30 is closed. The upper flange 12 of the upper flange 12 and the upper flange 12 of the positive moment section 20 is formed of an opening end surface 50 is attached to the truss-shaped horizontal bracing 52, the parent section (30) is bridge support Sections 0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) / 2 are placed in high-strength concrete at both sides of L1 (single soy sauce) and L2 (long soy sauce) sections around the central point. (0.16 to 0.32) L2 / 2 sections are poured into the L1 section of soy sauce, and (0.16 to 0.32) L1 / 2 sections are poured into the L1 section of the long liver. It is characterized in that the pour was synthesized by asymmetric cross-section to the longer pour synthesis.

Description

Steel box continuous bridge with irruglar span or regular span and this construction technique}

The present invention relates to a steel box continuous bridge having an uneven soy sauce and its construction method, in particular a steel box continuous bridge or a soybean soy sauce (L) having an uneven soy sauce consisting of L1 section that is only soy sauce and L2 is long soy sauce. Only a certain section of the upper flange of the parent cement section of the continuous bridge is formed as a closed section, but formed as an asymmetric closed section according to the moment stress, and the upper flange of the parent section other than the upper flange of the closed section asymmetrically closed in the parent section The upper flange of the positive moment section is formed with an opening section with truss-shaped horizontal bracing.The upper slab slab is prestressed with PC steel wire to the upper slab slab of the parent section, and the moment stress is applied to a certain section of the lower flange section of the parent section. Inequality to reduce steel volume by pouring high strength concrete With the present invention relates to a continuous steel box bridge and the construction method thereof.

In general, in the closed box steel box continuous bridge of rectangular or formulation with inequality soy sauce, the cross-sectional shape of the constant and parent cement sections consists of a closed section consisting of two abdomen, upper and lower flanges.

As mentioned above, the closed cross-section steel box continuous bridge of rectangular or formulation with uneven soy sauce is an uneconomical cross section due to overlapping members, and only considering the convenience of manufacturing and assembling, and waste of expensive steel materials Very serious situation.

That is, the upper flange of the constant moment section is a section subjected to compressive stress, and since the concrete slab slab receives the compressive stress for the load after the synthesis, rather than the steel upper flange, the closed steel upper flange is overlapped with the composite slab slab. Since only the structural function of the initial stage of construction and the role of simply maintaining the shape of a square or a formulation are used, it is a situation in which a large amount of steel is wasted because a large amount of steel is not used, and thus a large amount of steel is wasted. The upper flange is structurally effective because it corresponds to tensile stress, but the lower flange is uneconomical compared to concrete with high compressive force due to the large amount of steel due to the need for steel to cope with compressive stress.

In addition, the open-type steel box continuous bridge is a cross section of both the upper flange of the positive and the parent cement section, which reduces the amount of steel. However, the upper flange of the parent cement section opens the bottom plate slab of the parent cement section. There is a possibility of tensile cracks in the openings, and the open-type steel box continuous bridge is not widely applied.

Accordingly, the present invention has been made to solve the problems described above, the tensile stress in the upper section of the parent section of the continuous bridge steel box continuous bridge having an independence bridge consisting of L1 section, which is just soy sauce and L2 is long soy sauce The section corresponding to this large part is 0.08 (L1 + L2) / 2 to 0.16 (L1 + L2) / 2 on both sides of L1 and L2 centered on the center of the bridge support. The L1 section closes the (0.08 ~ 0.16) L2 / 2 section, and the L2 section, which is the long-term soy sauce, closes the (0.08 ~ 0.16) L1 / 2 section and closes the asymmetric cross section that closes longer to the L1 section. The upper flange of the parent cement section other than the upper flange of the closed section asymmetrically closed in the section and the upper flange of the constant moment section consist of an opening section with truss-shaped horizontal bracing. Prestress is introduced into the steel wire, and the compressive stress of the lower flange of the parent section is large, and 0.16 (L1 + L2) / 2 to 0.32 (L1 +) on both sides of the L1 and L2 sections around the center point of the bridge bearing. In the L2) / 2 section, high-strength concrete is poured, but in the L1 section, which is the soy sauce, (0.16 ~ 0.32) L2 / 2 section is poured and in the L2 section, which is long liver, the (0.16 ~ 0.32) L1 / 2 section is poured. It is synthesized and poured into an asymmetrical cross section that is put into L1 section for longer.The upper flange of the parent cement section responds to tensile stress with pre-stress introduced into the upper flange steel and bottom plate slab that are closed in an asymmetric cross section according to the moment stress. In the upper flange of the parent cement section and the upper flange of the constant moment section, other than the closed flanged upper flange, which is closed in asymmetrical section in the parent section, In the lower flange of the parent section, high-strength concrete is poured into the asymmetrical cross section according to the moment stress, like the upper flange closed with the asymmetrical cross section, to cope with the compressive stress, thereby reducing the steel requirement by 20-40%. The purpose is to provide a steel box continuous bridge and its construction method.

In addition, the section corresponding to the large tensile stress in the upper section of the parent section of the steel box continuous bridge having the dorsal soybean, the 0.08L ~ 0.16L section of the dorsal soy liver (L) on both sides centered on the center point of the bridge bearing. The upper flange of the parent cement section and the upper flange of the regular moment section other than the closed flanged upper flange of the parent section are composed of an opening section with truss-shaped horizontal bracing, and the upper floor plate slab of the parent section. Introducing prestress and compressing stress of the lower flange of the parent cement section, 0.16L ~ 0.32L section of the dorsal length L on both sides centered on the center of the bridge support. In the flange, prestress is introduced to the closed top flange steel and the bottom slab to cope with the tensile stress. In the upper section, the upper flange of the parent cement section other than the upper flange of the closed section is composed of an opening section in the upper flange of the positive moment section, which reduces the steel requirements and pours high-strength concrete in the lower flange of the parent section to cope with the compressive stress. The purpose of the present invention is to provide a continuous steel box bridge and its construction method which has a soy sauce so that the steel requirement is reduced by 20 ~ 40%.

Steel box continuous bridge having an inequality soy sauce according to the present invention for achieving the above object is the abdomen disposed on the left, right at regular intervals, the upper flange disposed horizontally between the upper portion of the abdomen, the left and right sides of the abdomen A continuous bridge steel box girder having an inequality soy sauce having different lengths of each other consisting of lower flanges arranged horizontally between the lower portions of the lower portion, wherein positive and positive bending moments and negative ( A steel box continuous bridge having an uneven section length consisting of a constant moment section and a parent section section according to a portion of the bending moment of-), wherein the upper flange of the parent section of the steel box continuous bridge having the uneven section length Sections 0.08 (L1 + L2) / 2 to 0.16 (L1 + L2) / 2 are formed as closed sections on both sides of the L1 and L2 sections around the central point of the base. (0.08 to 0.16) L2 / 2 sections are closed in the phosphorus L1 section, and (0.08 to 0.16) L1 / 2 sections are closed in the L2 section in the long-term soy sauce, and are closed in an asymmetric cross section that is closed longer in the L1 section. Asymmetrical closed section of the parent cement section The upper flange of the parent section and the upper flange of the section section except for the upper flange are formed with an opening section with truss-shaped horizontal bracing.The parent section is centered on the bridge bearing center point L1. On both sides of the L2 section, sections 0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) / 2 are cast and synthesized with high-strength concrete of a certain thickness, but sections (0.16 to 0.32) L2 / 2 are made only in the section L1. The pour synthesis is carried out, and the L2 section, which is the long finger soy sauce, is characterized in that (0.16 to 0.32) L1 / 2 sections are pour-synthesized and pour-synthesized with an asymmetric cross-section that adds pour synthesis into the L1 section.

In addition, the steel box continuous bridge having a dorsal soy sauce according to the present invention for achieving the above object is an abdomen disposed on the left, right at regular intervals, the upper flange disposed horizontally between the upper portion of the abdomen, A girder consisting of a lower flange horizontally arranged between the lower left and right sides, the positive moment section according to the portion where the positive and negative bending moments are generated in the girder while the girder is disposed. In the steel box continuous bridge, which is the dorsal length (L) in the longitudinal direction of the bridge consisting of a bridge and the parent cement section, the upper flange of the parent cement section of the steel box continuous bridge is formed on both sides of the center portion of the bridge bearing. 0.08L ~ 0.16L section is formed in the closed section, and the upper flange and the constant moment of the parent section other than the upper flange of the closed section of the parent section The upper flange of the liver is formed with an opening section with truss-shaped horizontal bracing, and the lower flange of the parent cement section is placed between 0.16L and 0.32L of the dorsal liver (L) on both sides of the center of the bridge bearing. It is characterized by.

In addition, the steel box continuous bridge construction method having an unequal soy sauce in accordance with the present invention for achieving the above object is an abdomen disposed in the left, right at regular intervals, and the upper flange disposed horizontally between the upper portion of the abdomen, A continuous bridge steel box girder having an uneven soy sauce having a different length of the soy sauce, consisting of lower flanges arranged horizontally between the lower left and right sides of the abdomen, and having positive (+) deflection in the girder with the girder disposed. In the construction method of a steel box continuous bridge having an uneven section length consisting of a constant moment section and a parent section according to the moment where the moment and the negative bending moment occur, the parent moment of the steel box continuous bridge having the uneven section length The upper flange of the section closes the 0.08 (L1 + L2) / 2 to 0.16 (L1 + L2) / 2 sections on both sides of the L1 and L2 sections around the center point of the bridge support. It is formed into a cross section, and (0.08 to 0.16) L2 / 2 sections are closed in the L1 section, which is only soy sauce, and (0.08 ~ 0.16) L1 / 2 sections are closed in the L1 section, depending on the moment stress. The upper flange of the parent flange section and the upper flange of the parent cement section other than the upper flange of the asymmetrical closed section of the parent cement section are formed of an opening section with truss-shaped horizontal brazing. The lower flange of the parent section is placed with a high-strength concrete of 0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) / 2 in both sections L1 and L2 around the center point of the bridge support. According to the stress, (0.16 ~ 0.32) L2 / 2 sections are poured into the L1 section of the complex soy sauce, and (0.16 ~ 0.32) L1 / 2 sections are poured into the L2 section of the long liver so that the L1 section is poured longer. Placing with an asymmetrical cross section It is characterized by synthesizing.

In addition, in the continuous bridge steel box girder bridge of the uneven ground soy sauce, which has multiple ground lengths, such as L1 + L2 + L3 + L4 + L5, each of which has a different length, the upper flange is centered around the center of each bridge bearing. Are asymmetrically closed and high-strength concrete is poured asymmetrically into the lower flange.

In addition, the steel box continuous bridge construction method having a dorsal soy sauce according to the present invention for achieving the above object is an abdomen disposed on the left, right at regular intervals, and the upper flange disposed horizontally between the upper portion of the abdomen, and A girder consisting of a lower flange arranged horizontally between the lower left and right sides of the abdomen, wherein the positive and negative bending moments are generated in the girder in a state where the girder is disposed. In the method of constructing a steel box continuous bridge which is a dorsal length (L) in the longitudinal direction of a bridge consisting of a cement section and a parent section, the upper flange of the parent section of the steel box continuous bridge is located on both sides of the center of the bridge support. A section 0.08L to 0.16L of (L) is formed in the closed section, and the image of the parent section other than the upper flange of the closed section of the parent section is formed. The upper flange between the flange and the constant moment section is formed by an opening section with truss-shaped horizontal bracing.The lower flange of the parent moment section has a section between 0.16L and 0.32L of the dorsal length (L) on both sides of the center of the bridge bearing. Characterized in that the concrete is poured into concrete.

As described above, the steel box continuous bridge and its construction method according to the present invention in a steel box continuous bridge having an uneven seizure, high-strength concrete in accordance with the compression and tensile stress in the constant, parent cement section Steel box continuous bridges can be used to efficiently and appropriately reduce steel requirements by 20-40%.

1 is an elevation view showing a rectangular steel box continuous bridge having an inequality soy sauce according to the present invention,
2 is a plan view of FIG.
3 is a cross-sectional view taken along the line AA of FIG.
4 is a cross-sectional view taken along line BB of FIG.
Figure 5 is an elevation view showing a continuous steel box formulation bridge having unequal soy sauce according to the present invention,
6 is a plan view of FIG. 5;
7 is a cross-sectional view taken along the line AA of FIG.
8 is a cross-sectional view taken along the line BB of FIG.
9 is a moment diagram of a steel box continuous bridge having an unequal soy sauce according to the present invention,
10 is an elevation view showing a rectangular steel box continuous bridge having a soy sauce soy sauce according to the present invention,
FIG. 11 is a plan view of FIG. 10;
12 is a cross-sectional view taken along the line AA of FIG. 10;
FIG. 13 is a cross-sectional view taken along line BB of FIG. 10;
14 is an elevation view showing a continuous steel box formulation having a dorsal soy sauce according to the present invention,
15 is a plan view of FIG. 14;
16 is a cross-sectional view taken along the line AA of FIG. 14;
17 is a cross-sectional view taken along line BB of FIG. 14;
18 is a moment diagram of a steel box continuous bridge having a soy sauce soy sauce according to the present invention.

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

[Example 1] Steel box continuous bridge having an uneven soy sauce and its construction method

1 is an elevation view showing a rectangular steel box continuous bridge having an unequal soy sauce according to the present invention, Figure 2 is a plan view of Figure 1, Figure 3 is a cross-sectional view taken along line AA of Figure 1, Figure 4 is a BB of Figure 1 FIG. 5 is an elevation view illustrating a continuous steel box continuous bridge having an uneven soy sauce according to the present invention, FIG. 6 is a plan view of FIG. 5, FIG. 7 is a sectional view taken along line AA of FIG. 5, and FIG. 5 is a cross-sectional view taken along line BB, and FIG. 9 is a moment diagram of a steel box continuous bridge having an inequality gage according to the present invention.

As shown in these drawings, the steel box continuous bridge (B) having an unequal soy sauce according to the present invention is horizontally between the abdomen 10 and the upper portion of the abdomen 10 arranged at left and right at regular intervals. It consists of the soy sauce liver L1 and the jangji soy sauce L2 having different lengths of the soy sauce consisting of the upper flange 12 is arranged, and the lower flange 14 arranged horizontally between the lower left and right sides of the abdomen 10. Girder (G) of the steel box continuous bridge (B) having an uneven interval length to be, a positive (+) bending moment and a negative (-) bending moment in the girder (G) with the girder (G) is arranged In the steel box continuous bridge (B) having an uneven edge length consisting of a constant moment section 20 and a parent moment section 30 in accordance with the part where the moment occurs,

The upper flange 12 of the parent cement section 30 of the steel box continuous bridge (B) having an uneven soy sauce consisting of complex soy sauce (L1) and long liver soy sauce (L2), each of which has different lengths of the soy sauce, Between the L1 (single soy sauce) and L2 (long soy sauce) sections, 0.08 (L1 + L2) / 2 to 0.16 (L1 + L2) / 2 sections are formed as the closed cross-section 40 around the point. (0.08 to 0.16) L2 / 2 sections are closed in the L1 section, and (0.08 to 0.16) L1 / 2 sections are closed in the L2 section, which is the long-term soy sauce, and closed in an asymmetric cross section, and the asymmetry of the parent section section 30 is closed. The upper flange 12 of the parent cement section 30 and the upper flange 12 of the constant moment section 20 other than the closed flange 40 and the upper flange 12 have an opening to which a truss-shaped horizontal bracing 52 is attached. It is formed as a cross-section 50, the lower flange 14 of the parent cement section 30, both of the L1 (single soy sauce), L2 (long soy sauce) section around the center of the bridge bearing Sections 0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) / 2 are poured into high-strength concrete (60) with a certain thickness, but only (0.16 ~ 0.32) L2 / 2 sections are poured into L1 section, which is soy sauce. In the L2 section, which is the long liver, the (0.16 to 0.32) L1 / 2 section is poured and the high-strength concrete 60 is poured into the asymmetric cross section.

In addition, the prestress is introduced by the PC steel wire 80 into the bottom plate slab 70 of the upper flange 12 of the parent section (30).

In addition, a precast composite or concrete fixing block 90 for prestress introduction is installed at the bottom flange slab 70 of the upper flange 12 of the parent cement section 30, and the precast composite or concrete fixing block is installed. 90 is a steel composite or high-strength concrete precast segment fixing block in consideration of workability, and can be manufactured in a factory or on the site in advance and assembled and installed, thereby improving quality control and constructability than construction by site casting.

In addition, the steel box continuous bridge (B) is the abdomen 10 is composed of a corrugated steel sheet.

On the other hand, 0.16 (L1 + L2) / 2 to 0.32 (L1) on both sides of the L1 (single soy sauce) and L2 (long soy sauce) sections with the center of the bridge bearing central portion of the lower flange 14 of the parent cement section 30 as the center. In addition to the + L2) / 2 section, the high-strength concrete 60b is additionally poured asymmetrically on both sides with a thin section.

In other words, when pouring high-strength concrete 60 to the lower flange 14 of the parent cement section 30, L1 (only soy sauce centering around the center of the bridge support center of the lower flange 14 of the parent cement section 30) ) In addition to the sections 0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) / 2 on both sides of the L2 (long-long soy sauce) section, thin sections of high-strength concrete (60b) are poured on both sides and the parent cement section ( 30) The overall compressive stress can be controlled.

Steel box continuous bridge (B) having an inequality soy sauce according to the present invention made of the configuration as described above can reduce the amount of steel 20 to 40% compared to the conventional closed steel box continuous bridge (B) In addition, a truss-shaped horizontal bracing 52 is attached to the opened upper flange 12 to resist torsion.

This results in the most efficient cross-section through the introduction of the closed section 40 and the prestress of the minimum section at the upper section of the parent cement section 30 and the synthesis of the high-strength concrete 60 at the bottom section of the parent section section. There is an effect.

On the other hand, the above-described liver is described as the main object of the two-span steel box continuous bridge (B) having an inequality soy sauce consisting of L1, which is just the chapter length, and L2, which is the length of the long chapter, The upper flange 12 of the parent moment section 30 is asymmetrically closed in accordance with the moment stress centering on the intersecting bridges installed on the left and right of the center of each bridge support even in an independant section of the steel box continuous bridge (B) having a section length. High strength concrete 60 is asymmetrically poured on the lower flange 14.

Hereinafter, the construction of a steel box continuous bridge having an uneven soy sauce according to the present invention having the configuration as described above.

As shown in Figures 1 to 9, the steel box continuous bridge construction method having an unequal soy sauce according to the present invention is disposed between the abdomen 10 and the upper portion of the abdomen 10, which are disposed at left and right at regular intervals. Jar liver L1 and jangji soy sauce L2, each of which has a length between the upper flange 12 arranged horizontally and the lower flange 14 arranged horizontally between the lower left and right sides of the abdomen 10, respectively. A continuous bridge (B) steel box girder (G) having an uneven interval consisting of a positive bending moment and negative (-) of the girder (G) in the state that the girder (G) is disposed In the construction method of the steel box continuous bridge (B) having an uneven edge length consisting of a constant moment section 20 and the parent moment section 30 according to the portion where the bending moment occurs,

The upper flange 12 of the parent cement section 30 of the steel box continuous bridge (B) having an uneven soy sauce consisting of complex soy sauce (L1) and long liver soy sauce (L2), each of which is different from each other, In the center, L1 (single soy sauce) and L2 (long soy sauce) sections, 0.08 (L1 + L2) / 2 to 0.16 (L1 + L2) / 2 sections, are formed as closed cross-sections 40, but according to the moment stress An asymmetric cross section that closes the (0.08 to 0.16) L2 / 2 section in the liver L1 section, and closes the (0.08 to 0.16) L1 / 2 section in the L2 section that is long liver, and closes longer in the L1 section. And the upper flange 12 of the upper flange 12 and the constant moment section 20 of the parent cement section 30 other than the asymmetrical closing section 40 of the parent cement section 30 and the upper flange 12. Is formed as an opening end surface 50 to which the truss-shaped horizontal bracing 52 is attached, and the lower flange 14 of the parent cement section 30 is the bridge bearing central point. In the center, L1 (single soy sauce) and L2 (long soy sauce) sections are placed in 0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) / 2 sections with a certain thickness of high-strength concrete (60). According to the stress, (0.16 to 0.32) L2 / 2 sections are poured into the L1 section, which is soy sauce, and (0.16 to 0.32) L1 / 2 sections are poured into the L1 section, which is longer liver. Pour in asymmetrical cross-sections to synthesize long pours.

That is, in the steel box continuous bridge (B) construction method having an inequality soy sauce according to the present invention, the upper flange 12 of the parent cement section 30 is a section corresponding to the portion of the large tensile stress centered on the bridge bearing center point On both sides of L1 (long-term soy sauce) and L2 (long-term soy sauce) sections, 0.08 (L1 + L2) / 2 to 0.16 (L1 + L2) / 2 sections are composed of the closed cross-section 40, depending on the moment stress. An asymmetrical section that closes the (0.08 to 0.16) L2 / 2 section to the L1 section, which is only hepatic, and closes the (0.08 to 0.16) L1 / 2 section to the L2 section, which is longer liver. After the configuration by closing the cross section, the upper flange 12 and the upper flange of the upper flange 12 of the parent cement section 30 other than the upper flange 12 of the asymmetric closed section 40 of the parent section (30). 12 is formed by the opening end surface 50 to which the truss-shaped horizontal bracing 52 is attached, and the lower flange of the parent section 30 14 is a high-strength concrete of 0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) / 2 on both sides of the L1 (single soy sauce) and L2 (long soy sauce) sections, centered on the bridge bearing central point. (60), but add (0.16 to 0.32) L2 / 2 sections to the L1 section, which is the soy sauce, according to the moment stress, and (0.16 to 0.32) L1 / 2 to the L2 section, the long liver. After pour synthesis by pouring the section into asymmetric cross-section to the longer pour synthesis L1 (single soy sauce) section, the upper flange 12 of the parent cement section 30, the bottom plate slab 70 of the PC steel wire (80) The prestress is introduced into the L1 (Long Soy) and L2 (Long Soy) sections on both sides of the center portion of the bridge support of the lower flange 14 of the parent section 30 by 0.16 (L1 + L2) /. In addition to the 2 ~ 0.32 (L1 + L2) / 2 sections, a thin section of the thickness is asymmetrically on both sides to add the high-strength concrete (60b).

On the other hand, even in the uneven ground soy steel box continuous bridge (B) having a plurality of ground livers of L1 (single soy sauce) + L2 (long soy sauce), according to the moment stress centered on the middle grounds installed on the left and right of the center of each bridge bearing. The upper flange 12 of the parent cement section 30 is asymmetrically closed, and the lower flange 14 is poured asymmetrically with high-strength concrete 60.

Steel box continuous bridge construction method having an inequality soy sauce consisting of the construction as described above, after manufacturing the steel box girders (G) with the configuration as described above in the steel bridge manufacturing plant, and then assembled in the same way as the general closed steel box continuous bridge Afterwards, since the construction of the high strength concrete 60 is poured into a portion of the lower flange 14 of the parent cement section 30 where the compressive stress is large, the manufacturing and installation work is not complicated and there is an easy working effect.

This results in the introduction of prestress into the closed section 40 of the minimum section above the parent section 30 and the bottom plate slab 70 of the parent section section 30 and the high-strength concrete section of the section below the parent section section 30. 60b) It is intended to make construction easy and economical by constructing the most economical and efficient cross section by synthesis.

In addition, in the introduction of the prestress into the bottom plate slab 70 of the parent section (30), the precast composite or concrete fixing block 90 of the PC steel wire 80 is a factory or as a composite or concrete precast segment fixing block Since it is manufactured in advance on the floor slab 70 when the concrete is installed and installed in advance, it can facilitate the quality control and construction of the fixing block.

In addition, 0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) / 2 sections, in which a high-strength concrete of a certain thickness is asymmetrically poured around the center of the bridge bearing, are asymmetrical to both sides with a thin section. It is possible to further reinforce the compressive stress in the lower flange 14 by further pouring (60b).

[Example 2] Steel box continuous bridge having a dorsal soy sauce and its construction method

FIG. 10 is an elevation view showing a rectangular steel box continuous bridge having a dorsal soy sauce according to the present invention, FIG. 11 is a plan view of FIG. 10, FIG. 12 is a sectional view taken along line AA of FIG. 10, and FIG. 13 is a line BB of FIG. 10. 14 is an elevation view showing a continuous steel box having a dorsal soy sauce according to the present invention, FIG. 15 is a plan view of FIG. 14, FIG. 16 is a sectional view taken along line AA of FIG. 14, and FIG. 17 is FIG. 14. Is a cross-sectional view taken along line BB, and FIG. 18 is a moment diagram of a steel box continuous bridge having a dorsal soy sauce according to the present invention.

As shown in these drawings, the steel box continuous bridge (B) having a dorsal soy sauce according to the present invention is disposed horizontally between the abdomen 10 and the upper portion of the abdomen 10 arranged at left and right at regular intervals. Girder (G) consisting of the upper flange 12 is a lower flange 14 is arranged horizontally connected between the lower left and right of the abdomen 10, the girder (G) in the state where the girder (G) is disposed Steel which is the dorsal length L in the longitudinal direction of the bridge consisting of the positive moment section 20 and the parent moment section 30 according to the part where positive and negative bending moments occur In the box continuous bridge (B),

The upper flange 12 of the parent section (30) is a section corresponding to a large tensile stress, the center of the bridge bearing (meaning the central portion of the pier installed on the inside) of the dorsal soy (L) on both sides The upper flange of the parent cement section 30 other than the upper flange 12 of the closed section 40 of the parent cement section 30 is formed of a closed section 40 in a closed state of 0.08L to 0.16L section. The upper flange 12 of the 12 and the constant moment section 20 is formed of an opening end surface 50 to which the truss-shaped horizontal bracing 52 is attached, and the parent plate section 30 has a bottom plate slab 70. The prestress is introduced, and the section corresponding to the large compressive stress of the lower flange 14 of the parent cement section 30 is 0.16L to 0.32L section of the dorsal liver L on both sides of the center of the bridge bearing. It is poured and poured into concrete (60).

In addition, the prestress is introduced by the PC steel wire 80 into the bottom plate slab 70 of the upper flange 12 of the parent section (30).

And the upper flange 12 bottom plate slab 70 of the parent cement section 30 is provided with a precast composite or concrete fixing block 90 for introducing prestress, the precast composite or concrete fixing block ( 90) is a steel composite or high-strength concrete precast segment fixing block in consideration of ease of construction, and is manufactured in advance in the factory or on the site and assembled and installed. Therefore, quality control and constructability can be improved rather than construction by site casting. have.

In addition, the steel box continuous bridge (B) is the abdomen 10 is composed of a corrugated steel sheet.

On the other hand, in pouring the high-strength concrete 60 to the lower flange 14 of the parent cement section 30, the dorsal length (L) on both sides around the point of the lower flange 14 of the parent cement section (30). In addition to the 0.16L ~ 0.32L section of the thin section of the concrete (60b) by pouring the composite can also control the compressive stress of the entire parent section (30).

Steel box continuous bridge (B) having a soy sauce soy sauce according to the present invention made of the configuration as described above can reduce the amount of steel 20 to 40% compared to the conventional closed steel box continuous bridge, the upper opening The truss-shaped horizontal bracing 52 is attached to the flange 12 to resist torsion.

This is to introduce the most efficient cross-section by introducing the closed section 40 and the prestress of the minimum section in the upper section of the parent cement section 30 and the synthesis of the minimum section of concrete 60 in the lower section of the parent section section to improve economic efficiency. It has an effect.

Hereinafter, the construction of a steel box continuous bridge having a soy sauce soy sauce according to the present invention having the configuration as described above.

As shown in Figure 10 to 18, the steel box continuous bridge construction method having a dorsal liver in accordance with the present invention is horizontally disposed between the abdomen (10) and the upper portion of the abdomen 10, which are disposed at a left and right at regular intervals Girder (G) consisting of the upper flange 12 is arranged to be arranged, and the lower flange 14 is arranged horizontally connected between the lower left and right of the abdomen 10, the girder in the state where the girder (G) is disposed Elongation length (L) in the longitudinal direction of the bridge consisting of the positive moment section 20 and the parent moment section 30 in accordance with the portion where the positive (+) bending moment and the negative (-) bending moment occur in (G). In the steel box continuous bridge (B) construction method consisting of,

The upper flange 12 of the parent cement section 30 of the steel box continuous bridge (B) having the dorsal soybean is a closed section of the 0.08L ~ 0.16L section of the doji liver (L) to both sides around the center of the bridge bearing ( 40 and an upper flange 12 and a constant moment section 20 of the upper flange 12 of the parent section 30 other than the upper flange 12 of the closed end face 40 of the parent section 30. 12 is formed by the opening end surface 50 to which the truss-shaped horizontal bracing 52 is attached, and the lower flange 14 of the parent cement section 30 is formed on both sides of the center of the bridge support. 0.16L ~ 0.32L section is poured concrete (60).

That is, the steel box continuous bridge construction method according to the present invention, the parent flange section 30 other than the upper flange 12 and the parent cement section 30, the closed section 40, the upper flange 12 of the positive moment section 20 In the upper flange 12 of the secured only the upper flange (12) necessary for the synthesis with the bottom plate slab 70, and removes all the rest consisting of an open end surface 50 with a truss-shaped horizontal bracing 52 In the upper flange 12 of the parent cement section 30, a section corresponding to a large tensile stress section, the 0.08L ~ 0.16L section of the dorsal length (L) on both sides centered on the center of the bridge receiving section (40) After constructing, the prestress is introduced into the upper bottom plate slab 70 of the parent cement section 30, and the center portion of the bridge bearing into the section corresponding to the portion where the compressive stress of the lower flange 14 of the parent cement section 30 is large. Concrete out of the 0.16L to 0.32L section of the back ground soy sauce (L) on both sides to the center When placed and synthesized at (60), 0.08L to 0.16L of dorsal length (L) on both sides, centering on the center of the bridge support, which is a section of the upper flange 12, of the parent cement section 30, which is a section corresponding to the tensile stress. Outside the section, the existing steel requirements are applied as it is, the parent plate section 30, the upper bottom plate slab 70 is prestressed, the section corresponding to the compressive stress, that is, the constant moment section 20, the top plate 12 in the bottom plate The slab 70 serves as a complement to the steel material, and the concrete outside the 0.16L to 0.32L section of the dorsal section L on both sides centering on the center of the bridge bearing which is a certain section of the lower flange 14 of the parent cement section 30. 60b) serves as a complement to steel materials, which can reduce 20 ~ 40% of the steel requirements of existing steel box continuous bridges.

Steel box continuous bridge construction method as described above, after manufacturing the steel box girders (G) with the configuration as described above in the steel bridge fabrication plant, after assembling through the same method as the normal closed steel box continuous bridge, the parent section (30) Since the construction of the lower flange 14 of the compression stress of a large portion of the high-strength concrete (60) in the method of placing only because the construction, installation is not complicated and there is also an easy operation effect.

This results in the introduction of prestress into the closed section 40 of the minimum section above the parent section 30 and the bottom plate slab 70 of the parent section section 30 and the high-strength concrete section of the section below the parent section section 30. 60b) It is intended to make construction easy and economical by constructing the most economical and efficient cross section by synthesis.

In addition, in the introduction of the prestress into the bottom plate slab 70 of the parent section (30), the precast composite or concrete fixing block 90 of the PC steel wire 80 is a factory or as a composite or concrete precast segment fixing block Since it is manufactured in advance on the floor slab 70 when the concrete is installed and installed in advance, it can facilitate the quality control and construction of the fixing block.

10: abdomen 12: upper flange
14: lower flange 20: constant moment section
30: parent section 40: closed section
50: opening cross-section 52: horizontal bracing
60: high strength concrete 60b: high strength concrete
70: bottom plate slab 80: PC steel wire
90: precast rigid composite or concrete fixing block
B: Steel box continuous bridge G: Girder
L: Soy sauce soy sauce L1: Soy sauce soy sauce
L2: Soy Sauce

Claims (14)

The lower part arranged horizontally between the lower part of the left and right sides of the abdomen 10, the upper flange 12 disposed horizontally between the upper part of the abdomen 10, the left and right arranged at regular intervals As a girder G of the steel box continuous bridge B which has the uneven ground soy sauce consisting of the soy sauce soy sauce L1 and the long soy sauce soy sauce L2 each having the length of the soy sauce made of the flange 14,
A positive moment section 20 and a parent moment section 30 according to a portion where a positive (+) bending moment and a negative (-) bending moment occur in the girder G while the girder G is disposed. In the steel box continuous bridge (B) having an inequality soy sauce consisting of,
The upper flange 12 of the parent cement section 30 of the steel box continuous bridge (B) having an uneven soy sauce consisting of complex soy sauce (L1) and long liver soy sauce (L2), each of which has different lengths of the soy sauce, Between the L1 (single soy sauce) and L2 (long soy sauce) sections, 0.08 (L1 + L2) / 2 to 0.16 (L1 + L2) / 2 sections are formed as the closed cross-section 40 around the point. (0.08 to 0.16) L2 / 2 sections are closed in the L1 section, and (0.08 to 0.16) L1 / 2 sections are closed in the L2 section, which is the long-term soy sauce, and closed in an asymmetric cross section, and the asymmetry of the parent section section 30 is closed. The upper flange 12 of the parent cement section 30 and the upper flange 12 of the constant moment section 20 other than the closed flange 40 and the upper flange 12 have an opening to which a truss-shaped horizontal bracing 52 is attached. It is formed as a cross-section 50, the lower flange 14 of the parent cement section 30, both of the L1 (single soy sauce), L2 (long soy sauce) section around the center of the bridge bearing Sections 0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) / 2 are poured into high-strength concrete with a certain thickness, but only (0.16 ~ 0.32) L2 / 2 sections are poured into L1, which is soy sauce, In the long section soy sauce L2 section (0.16 ~ 0.32) L1 / 2 section is poured and the high-strength concrete is poured into the asymmetric cross-section, the upper flange 12 of the parent section (30) bottom plate slab 70 is PC Prestress is introduced by the steel wire 80, it is composed of a precast composite or concrete fixing block 90 so that the PC steel wire 80 can be fixed, the lower flange 14 of the parent section (30) It is asymmetrical on both sides with a thin section in addition to the sections 0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) / 2 on both sides of the L1 (single soy sauce) and L2 (long soy sauce) sections around the center of the bridge support Steel box continuous bridge having unequal soy sauce, characterized in that the high-strength concrete (60b) is added. delete delete The method of claim 1,
According to the moment stress, the moments are centered around the bridges installed on the left and right of the center of each bridge support even in the uneven bridge soy steel box continuous bridge (B), which has a plurality of bridges of L1 (single soy) + L2 (long soy). The upper flange 12 of the section 30 is asymmetrically closed, the lower flange 14 is a steel box continuous bridge having an uneven soy sauce, characterized in that the high-strength concrete is asymmetrically poured. delete delete delete The lower part arranged horizontally between the lower part of the left and right sides of the abdomen 10, the upper flange 12 disposed horizontally between the upper part of the abdomen 10, the left and right arranged at regular intervals A continuous bridge (B) steel box girder (G) having an uneven edge soy sauce consisting of jar soy sauce L1 and long soy sauce soy sauce L2, each of which has a different length of the soy sauce consisting of the flanges 14, wherein the girders G are According to the position where the positive (+) bending moment and the negative (-) bending moment are generated in the girder (G) in an arranged state, an inequality sheet consisting of a positive moment section 20 and a parent moment section 30 is formed. In the construction method of the steel box continuous bridge (B),
The upper flange 12 of the parent cement section 30 of the steel box continuous bridge (B) having an uneven soy sauce consisting of complex soy sauce (L1) and long liver soy sauce (L2), each of which is different from each other, In the center, L1 (single soy sauce) and L2 (long soy sauce) sections, 0.08 (L1 + L2) / 2 to 0.16 (L1 + L2) / 2 sections, are formed as closed cross-sections 40, but only in accordance with the moment stress. An asymmetric cross section that closes the (0.08 to 0.16) L2 / 2 section in the liver L1 section, and closes the (0.08 to 0.16) L1 / 2 section in the L2 section that is long liver, and closes longer in the L1 section. And the upper flange 12 of the upper flange 12 and the constant moment section 20 of the parent cement section 30 other than the asymmetrical closing section 40 of the parent cement section 30 and the upper flange 12. Is formed as an opening end surface 50 to which the truss-shaped horizontal bracing 52 is attached, and the lower flange 14 of the parent cement section 30 is the bridge bearing central point. In the center, L1 (single soy sauce) and L2 sections are placed in 0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) / 2 sections with high-strength concrete of a certain thickness. In the asymmetrical cross section, the (0.16 ~ 0.32) L2 / 2 section is poured into the section, and the L2 section, which is the long finger soy sauce, is poured into the L1 section. Pour synthesis
Prestress is introduced into the upper flange 12 bottom plate slab 70 of the parent section 30 by a PC steel wire 80, and precast steel composite or concrete fixing so that the PC steel wire 80 can be fixed Consisting of blocks 90,
0.16 (L1 + L2) / 2 to 0.32 (L1 + L2) on both sides of the L1 (long-term soy sauce) and L2 (long-term soy sauce) sections with the center of the bridge bearing central portion of the lower flange 14 of the parent section section 30 as the center. Steel box continuous bridge construction method with an unequal soy sauce, characterized in that the addition of high-strength concrete (60b) asymmetrically on both sides with a thin section in addition to the / 2 section. delete delete The method of claim 8,
According to the moment stress, the moments are centered around the bridges installed on the left and right of the center of each bridge support even in the uneven bridge soy steel box continuous bridge (B), which has a plurality of bridges of L1 (single soy) + L2 (long soy). Method for constructing a steel box continuous bridge having an inequality soy sauce, characterized in that the upper flange 12 of the section 30 asymmetrically closed, and the lower flange 14 asymmetrically pours a high-strength concrete (60).
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