KR101725686B1 - Pipe girder for Bridge - Google Patents

Pipe girder for Bridge Download PDF

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Publication number
KR101725686B1
KR101725686B1 KR1020150171398A KR20150171398A KR101725686B1 KR 101725686 B1 KR101725686 B1 KR 101725686B1 KR 1020150171398 A KR1020150171398 A KR 1020150171398A KR 20150171398 A KR20150171398 A KR 20150171398A KR 101725686 B1 KR101725686 B1 KR 101725686B1
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South Korea
Prior art keywords
wall
pipe
concrete
inclined wall
side tube
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KR1020150171398A
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Korean (ko)
Inventor
고재용
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고재용
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Priority to KR1020150171398A priority Critical patent/KR101725686B1/en
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Publication of KR101725686B1 publication Critical patent/KR101725686B1/en

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
    • E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced
    • E01D2101/268—Composite concrete-metal

Abstract

The steel pipe girder 100 for a bridge according to the present invention has not only strong bending rigidity by the upper filling portion 171 and the lower filling portion 172 filled with concrete in a sectional shape of a sector but also the vertical partition walls 111 and 121, Type concrete filled steel pipe girder 1, which is filled with concrete between the vertical partition walls 111 and 121, is lightweight and has sufficient bending rigidity as compared with the conventional "I-type concrete filled steel pipe girder 1" When the concrete is injected through the concrete injection hole 151 with the steel pipe slightly inclined, the shape of the upper pipe 161 and the lower pipe 162 (the inner space of the upper pipe 230 and the lower pipe 240) The concrete is more easily filled in the upper pipe line 161 and the lower pipe line 162 because the concrete is simpler than the conventional one and the surface area is smaller and the concrete flows well in the longitudinal direction of the steel pipe to limit the length of the girder 100 .

Description

{Pipe girder for Bridge}

The present invention relates to a steel pipe girder for bridges, and more particularly, to a steel pipe girder for bridges capable of securing sufficient bending rigidity while reducing the weight of the steel pipe compared to the conventional one.

Steel pipe girders are used to support the bridge decks constituting the bridge, and these steel pipe girders should have bending stiffness.

1 is a view for explaining a force moment acting on a steel pipe girder 10. Fig. 1, since the steel pipe girder 10 is supported under the bridge upper plate 20, when the bridge upper plate 20 receives a downward force due to its own load or external force, the upper end of the steel pipe girder 10 And a tensile force is applied to the lower side. The symbol "-" denotes a site where compressive stress acts, and the symbol "+" denotes a site where tensile stress acts.

Called "concrete filled steel pipe girder" is used in which a concrete having a strong force against tensile or compressive stress is placed in a steel pipe because the steel pipe girder 10 is made of a simple steel pipe.

As a part of this, Korean Patent No. 1059578 (issued on Aug. 26, 2011) discloses an "I-type concrete filled steel pipe girder" in which concrete is filled in an I-shape inside a circular steel pipe so as to enhance bending rigidity.

FIG. 2 is a view for explaining an I-type concrete filled steel pipe girder 1 disclosed in Korean Patent No. 1059578.

2, a conventional steel pipe girder 1 includes a pair of partition members 3 symmetrically arranged on both sides of a virtual vertical center line crossing the center of the steel pipe 2, And the concrete is placed between the partition members 3 to form the concrete filling part 4. [ At this time, the partition member 3 is divided into the vertical portion 3-2 and the inclined portion 3-1 so that the concrete filling portion 4 has a substantially "I" cross-sectional shape. The stud bolts 5 installed in the concrete filling part 4 are for firmly securing the concrete to the steel pipe 2 to the partition wall member 3.

The above-mentioned conventional steel pipe girder 1 has strong bending rigidity due to the presence of the concrete filling portion 4, but has some problems as follows.

First, the intrinsic part contributing to the bending stiffness is unnecessarily poured into the middle part (C) of the I-shaped part even though the upper part (A) and the lower part (B) There is a disadvantage that it goes out excessively.

Secondly, a steel pipe 2 having a complicated inner shape must first be manufactured, and it is not easy to bolt or weld such a complicated partition member 3 along the length of the steel pipe 2 inside the steel pipe 2 .

third. The concrete should be poured into the space inside the partition member 3 through the upper end of the steel pipe 2 by setting up the steel pipe 2 to pour concrete into the inside of the steel pipe 2. If the length of the steel pipe 2 is long, It is difficult to work and the length of the steel pipe 2 is limited.

3, the concrete injection hole 6 may be formed in the partition member 3 and the concrete may be injected through the concrete injection hole 6 in a state in which the steel pipe 2 is slightly inclined. In this case, Since the inner space of the partition member 3 is complicated as well as the frictional force that interrupts the flow of the concrete greatly acts and concretes can not flow properly to every corner of the partition member 3 And the concrete does not flow well in the longitudinal direction of the steel pipe 2, so that the length of the girder 1 is inevitably limited.

Korean Registered Patent No. 1059578 (Bulletin of 26th August, 2011)

Therefore, a problem to be solved by the present invention is to provide a concrete structure in which concrete is placed only in an intrinsic part where compressive stress and tensile stress largely act to induce weight reduction, and even if the shape of the concrete placement part is not complicated, Which can solve the above-described conventional problems by manufacturing a steel pipe in a prefabricated manner so that concrete can be poured into the steel pipe girder.

According to an aspect of the present invention, there is provided a steel pipe girder comprising:

A lower inclined wall extending downwardly is formed at an upper end of the vertical partition wall and an upper inclined wall is formed at an upper end of the vertical partition wall so as to extend obliquely upward, A first side tube and a second side tube each having a tubular side wall formed so as to connect the end of the lower inclined wall, Bolted to each other so as to be interposed therebetween,

An upper outer wall is formed to connect the upper inclined wall end of the first side tube and the upper inclined wall end of the second side tube, and a lower inclined wall end of the second side tube and a lower inclined wall end of the second side tube An upper inclined wall of the first side tube, an upper inclined wall of the second side tube, and an upper tube having the upper outer wall as a peripheral wall; A lower slope wall of the second side tube, and a lower conduit having the lower outer wall as a peripheral wall,

And concrete is poured into the upper pipe and the lower pipe.

The present invention is characterized in that a concrete injection hole is formed in the upper inclined wall or the lower inclined wall. The concrete injection hole may be formed in the upper outer wall or the lower outer wall.

According to another aspect of the present invention, there is provided a steel pipe girder comprising:

A lower inclined wall extending downwardly is formed at an upper end of the vertical partition wall and an upper inclined wall is formed at an upper end of the vertical partition wall so as to extend obliquely upward, A first side tube and a second side tube each having a tubular side wall formed so as to connect the end of the lower inclined wall, Bolted to each other so as to be interposed therebetween,

The upper side of the first side tube and the second side tube is provided with an upper tube having a fan-shaped cross section to be bolted to the upper inclined wall of the first side tube and the upper inclined wall of the second side tube, respectively, ,

A bottom pipe having a fan-shaped cross-section is provided at a lower portion of the first side pipe and the second side pipe so as to be bolted to the lower inclined wall of the first side pipe and the lower inclined wall of the second side pipe,

And concrete is inserted into the upper pipe and the lower pipe.

It is preferable that at least one concrete injection hole is formed along the length of the upper pipe in the wall of the upper pipe to be interposed in the upper inclined wall.

And at least one concrete injection hole is formed along the length of the lower pipe on the wall of the lower pipe that is to be in contact with the lower inclined wall.

The steel pipe girder for a bridge according to the present invention has a strong bending rigidity by the upper filling part and the lower filling part filled with concrete in a sectional shape of a sector and the longitudinal bulkhead itself is doubly folded and is strong against the bending rigidity, Compared with the conventional "I type concrete filled steel pipe girder" in which the concrete is filled between the bulkheads, the weight becomes lighter and has sufficient bending rigidity.

When the concrete is injected through the concrete injection hole in a state in which the steel pipe is slightly inclined, the shape of the upper pipe and the lower pipe (or the inner space of the upper pipe and the lower pipe) And the concrete flows well in the longitudinal direction of the steel pipe, so that it is less restricted to form the length of the girder.

1 is a view for explaining a force moment acting on a steel pipe girder 10;
2 and 3 are views for explaining a conventional steel pipe girder 1;
4 is a view for explaining a steel pipe girder 100 for a bridge according to the first embodiment of the present invention;
FIG. 5 is a view for explaining the manufacturing method of FIG. 4;
6 is a view for explaining a steel pipe girder 100 for a bridge according to a second embodiment of the present invention;
7 is a view for explaining a steel pipe girder 100 for a bridge according to a third embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are merely provided to understand the contents of the present invention, and those skilled in the art will be able to make many modifications within the technical scope of the present invention. Therefore, the scope of the present invention should not be construed as being limited to these embodiments.

[Example 1]

FIG. 4 is a view for explaining a steel pipe girder 100 for a bridge according to the first embodiment of the present invention, and FIG. 5 is a view for explaining the manufacturing method thereof.

4 and 5, a steel pipe girder 100 according to a first embodiment of the present invention includes a first side pipe 110, a second side pipe 120, an upper outer wall 130, And a lower outer wall 140 as a skeleton thereof.

The first side tube 110 has a tubular shape circumferentially walled by a vertical partition wall 111, an upper inclined wall 112, a lower inclined wall 113, and a side outer wall 114.

The upper inclined wall 112 of the first side tube 110 is formed so as to extend sideways from the upper end of the vertical partition wall 111 to be inclined upward and the lower inclined wall 113 is formed to extend from the lower end of the vertical partition 111 And extends sideways with an obliquely downward direction. The side outer wall 114 is formed to connect the end of the upper inclined wall 112 and the end of the lower inclined wall 113.

The second side tube 120 also has a vertical partition 121, an upper inclined wall 122, a lower inclined wall 123, and a peripheral walled tube 124 by the side outer wall 124 in the same manner as the first side tube 110. [ Shape.

The first side tube 110 and the second side tube 120 can be obtained by extrusion or the like.

The first side tube 110 and the second side tube 120 are connected to each other by fastening bolts 153 so that the longitudinal ribs 111 and 121 are in contact with each other while being backed. Reference numeral 154 denotes a nut fastened to the fastening bolt 153.

The first slanting wall 112 and the second slanting wall 122 of the first side tube 110 and the second side tube 120 are connected to each other in a state where the first side tube 1110 and the second side tube 120 are coupled, The upper outer wall 130 is installed by welding or the like. Accordingly, an upper channel 161 having the upper inclined walls 112 and 122 and the upper outer wall 130 as peripheral walls is formed.

When the first side tube 110 and the second side tube 120 are engaged with each other, the end of the lower inclined wall 113 of the first side tube 110 and the lower inclined wall of the second side tube 120 123, the lower outer wall 140 is installed by welding or the like. Accordingly, a lower channel 162 having the lower inclined walls 113 and 123 and the lower outer wall 140 as peripheral walls is formed.

The upper outer wall 130, the lower outer wall 140 and the outer side walls 114 and 124 are bent in a arc shape to form a first side tube 100, a second side tube 120, an upper outer wall 130, (140) has a cylindrical shape when viewed from the outside.

Concrete is injected through the upper inclined wall 112 of the first side pipe 110 and the concrete injection hole 151 provided in the upper inclined wall 122 of the second side pipe 120, A filling portion 171 is formed and a lower portion of the lower inclined wall 113 of the first side tube 110 and a lower portion of the concrete injection hole (not shown) provided in the lower inclined wall 123 of the second side tube 120 The lower filling part 172 is formed.

It is preferable that the concrete injection hole 151 is sealed by welding a metal piece at an appropriate time after the concrete injection and the concrete injected into the upper filling part 171 and the lower filling part 172 is sealed before or after the sealing It is hardened through the process. Preferably, the curing process should proceed in an unsealed state. The upper inclined walls 112 and 122 and the lower inclined walls 113 and 123 are provided with stud bolts 152 for catching concrete.

[Example 2]

6 is a view for explaining a steel pipe girder 100 for a bridge according to a second embodiment of the present invention. Unlike the first embodiment, a concrete injection hole 151 is formed between the upper outer wall 130 and the lower outer wall 140, As shown in FIG.

According to the second embodiment, since the concrete injection hole 151 is exposed to the outside of the steel pipe, it is easy for the operator to form a plurality of the concrete injection holes 151 in the longitudinal direction of the steel pipe. If a plurality of concrete injection holes 151 are formed in the longitudinal direction of the steel pipe, the concrete can be easily filled into the upper pipe line 161 and the lower pipe line 162 even if the length of the steel pipe is long.

[Example 3]

7 is a view for explaining a steel pipe girder 100 for a bridge according to a third embodiment of the present invention. As shown in FIG. 7, the first side tube 110 and the second side tube 120 have the same construction and connection as those of the first embodiment, and instead of only the upper outer wall 130 and the lower outer wall 140, The tube 230 and the lower tube 240 are provided.

The upper tube 230 has a tubular shape having a fan-shaped cross section and has therein an upper tube 161 as in the first embodiment. The upper tube 230 is inserted into the upper inclined wall 112 of the first side tube 110 and the upper inclined wall 122 of the second side tube 120 while being opened at both sides with a central angle, .

Like the upper tube 230, the lower tube 240 has a tube shape having a fan-shaped cross section, and has a lower tube channel 162 therein as in the first embodiment. The lower tube 240 is inserted into the lower inclined wall 113 of the first side tube 110 and the lower inclined wall 123 of the second side tube 120 so that the side surfaces of the lower tube 240, .

Concrete is filled in the upper pipe 230 and the lower pipe 240 to form an upper filling part 171 and a lower filling part 172. The filling of the concrete is carried out through the upper pipe 230 and the lower pipe 240 May be made before or after bolting the first side tube 110 and the second side tube 120 to each other.

In this case, it is more preferable that the electrons, that is, the upper pipe 230 and the lower pipe 240 are filled with concrete, and then they are bolted to the first side pipe 110 and the second side pipe 120. Therefore, the concrete filling operation itself is very convenient, and a plurality of concrete injection holes 151 can be freely formed along both sides of the upper pipe 230 along the length of the steel pipe. The same is true of the lower pipe 240.

When the concrete is filled in the upper pipe 230 and the lower pipe 240 and the bolts are fastened to the first side pipe 110 and the second side pipe 120 after the concrete is filled in the upper pipe 230 and the lower pipe 240, 230 and the lower pipe 240 to fill the concrete in a state of being fitted outwardly.

In the case where the concrete injection hole 151 is formed on the arcuate surface, it is preferable to pass the sealing process later. However, when the concrete injection hole 151 is formed on both sides, the upper inclined walls 112 and 122, The concrete injection holes 151 may be covered by the slits 113 and 123, so that the sealing process may be omitted.

The steel pipe girder 100 according to the present invention as described above has strong bending rigidity not only by the upper filling portion 171 and the lower filling portion 172 filled with concrete in the shape of a sector, Type concrete filled steel pipe girder (1), which is filled with concrete between the longitudinal bulkheads (111, 121), since it is double-folded and has high bending rigidity, sufficient bending stiffness .

When the concrete is injected through the concrete injection hole 151 in a state in which the steel pipe is slightly inclined, the upper pipe 161 and the lower pipe 162 (the inner pipe of the upper pipe 230 and the lower pipe 240 in the third embodiment) The concrete is more easily filled in the upper pipe line 161 and the lower pipe line 162 and the concrete flows well in the longitudinal direction of the steel pipe so that the length of the girder 100 is longer And is less subject to formation restrictions.

100: steel pipe girder for bridge 110: first side pipe
111, 121: vertical barrier ribs 112, 122: upper inclined wall
113, 123: lower inclined wall 114, 124:
120: second side tube 130: upper outer wall
140: lower outer wall 151: concrete injection hole
152: stud bolt 153: fastening bolt
154: nut 161: upper pipe
162: lower conduit 171: upper filling part
172: lower filling part 230: upper tube
240: Lower tube

Claims (6)

The lower end of the vertical partition wall is formed with a lower inclined wall extending obliquely downward from the lower end of the vertical partition wall. The upper inclined wall is formed at an upper end of the vertical inclined wall, A first side tube and a second side tube having a tubular shape and formed with side walls so as to connect the ends of the lower inclined wall, wherein the first side tube and the second side tube have mutually parallel longitudinal barrier ribs Bolted to each other so as to be interposed therebetween,
Wherein an upper outer wall is formed so as to connect an upper inclined wall end of the first side tube and an upper inclined wall end of the second side tube and a lower inclined wall end of the second side tube and a lower inclined wall end of the second side tube, An upper wall formed with a lower outer wall to connect the upper end of the first side tube and the lower side wall of the first side tube, A slant wall, a lower inclined wall of the second side tube, and a lower conduit having the lower outer wall as a peripheral wall,
Wherein the concrete pipe is installed in the upper pipe and the lower pipe. The steel pipe girder of claim 1, wherein a concrete injection hole is formed in the upper inclined wall or the lower inclined wall. The steel pipe girder of claim 1, wherein a concrete injection hole is formed in the upper outer wall or the lower outer wall. A lower inclined wall extending downwardly is formed at an upper end of the vertical partition wall and an upper inclined wall is formed at an upper end of the vertical partition wall so as to extend obliquely upward, A first side tube and a second side tube each having a tubular side wall formed so as to connect the end of the lower inclined wall, Bolted to each other so as to be interposed therebetween,
The upper side of the first side tube and the second side tube is provided with an upper tube having a fan-shaped cross section to be bolted to the upper inclined wall of the first side tube and the upper inclined wall of the second side tube, respectively, ,
A bottom pipe having a fan-shaped cross-section is provided at a lower portion of the first side pipe and the second side pipe so as to be bolted to the lower inclined wall of the first side pipe and the lower inclined wall of the second side pipe,
And a concrete is inserted into the upper pipe and the lower pipe. 5. The steel pipe girder for bridges according to claim 4, wherein at least one concrete injection hole is formed along the length of the upper pipe in the wall of the upper pipe to be in contact with the upper inclined wall. 5. The steel pipe girder according to claim 4, wherein at least one concrete injection hole is formed along a length of the lower pipe in a wall of the lower pipe which is in contact with the lower inclined wall.
KR1020150171398A 2015-12-03 2015-12-03 Pipe girder for Bridge KR101725686B1 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101782958B1 (en) * 2017-04-27 2017-09-28 오종훈 Pedestrian bridge
KR101889791B1 (en) * 2017-09-29 2018-08-20 (주)백경종합건설 Manufacturing method of steel pipe girder for bridge and the girders produced by the method
KR101984043B1 (en) 2018-09-20 2019-09-04 휴먼이엔씨주식회사 Steel pipe girder for bridge
KR102171943B1 (en) 2019-10-29 2020-11-02 주식회사 알피에스스트럭처 Circular Steel Girder
KR102249973B1 (en) 2020-10-23 2021-05-11 주식회사 알피에스스트럭처 Circular Steel Girder
KR102277420B1 (en) 2020-10-14 2021-07-13 김용학 Girder system using steel pipe for bridge and its construction method
KR102332409B1 (en) 2021-05-07 2021-12-01 주식회사 태하 Steel pipe girder for strut-type footbridge to generate reaction force against the applied load

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100945050B1 (en) 2009-06-11 2010-03-05 (주)리튼브릿지 Steel concrete tube girder
KR101011866B1 (en) 2010-06-24 2011-01-31 김석희 The truss combinations in the steel pipe girder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100945050B1 (en) 2009-06-11 2010-03-05 (주)리튼브릿지 Steel concrete tube girder
KR101011866B1 (en) 2010-06-24 2011-01-31 김석희 The truss combinations in the steel pipe girder

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101782958B1 (en) * 2017-04-27 2017-09-28 오종훈 Pedestrian bridge
KR101889791B1 (en) * 2017-09-29 2018-08-20 (주)백경종합건설 Manufacturing method of steel pipe girder for bridge and the girders produced by the method
KR101984043B1 (en) 2018-09-20 2019-09-04 휴먼이엔씨주식회사 Steel pipe girder for bridge
KR102171943B1 (en) 2019-10-29 2020-11-02 주식회사 알피에스스트럭처 Circular Steel Girder
KR102277420B1 (en) 2020-10-14 2021-07-13 김용학 Girder system using steel pipe for bridge and its construction method
KR102249973B1 (en) 2020-10-23 2021-05-11 주식회사 알피에스스트럭처 Circular Steel Girder
KR102332409B1 (en) 2021-05-07 2021-12-01 주식회사 태하 Steel pipe girder for strut-type footbridge to generate reaction force against the applied load

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