KR101637330B1

KR101637330B1 - Correctible girder structure for rahmen bridge and the constructurion method using the same

Info

Publication number: KR101637330B1
Application number: KR1020160014614A
Authority: KR
Inventors: 강경훈
Original assignee: 강경훈
Priority date: 2016-02-05
Filing date: 2016-02-05
Publication date: 2016-07-07

Abstract

The present invention relates to a girder installation structure of a rahmen bridge. More specifically, the girder installation structure consists of: a girder member compounded with an upper plate concrete to support a load of an upper part; a lower part supporting member which supports the girder member to transfer the load to a concrete supporting body; and a connection adjusting member which connects between the girder member and the lower part supporting member. In regards to this, the girder member is composed of a pair of connecting girders coupled to the connection adjusting member by bolts, and a central girder positioned between the connecting girders. In addition, anti-conduction units of the central girder are arranged on connection regions between the central girder and the connecting girders.

Description

TECHNICAL FIELD [0001] The present invention relates to a girder installation structure of a ramen bridge capable of correcting errors, and a construction method of a ramen bridge using the girder bridge construction.

The present invention relates to a girder installation structure of a ramen bridge, more specifically, to a girder installation structure of a ramen bridge capable of minimizing cracks in a right corner portion while achieving workability and precision in connection portions of the girder, and a construction method thereof will be.

Since the upper structure and the lower structure supporting the upper structure of the girder are rigidly coupled with each other, the upper structure and the lower structure act integrally, and therefore the rigidity is excellent. However, there is a limit in the length of the span, and cracks may occur in the right corner where the upper structure and the lower structure are combined.

Various methods for solving the problems of the above-mentioned ramen bridge have been continuously studied.

Typical examples of such a method include a girder having a composite structure using a steel having a high stiffness with respect to a bending moment, but by introducing a prestress into a portion having a large bending moment, the cross section and the weight of the girder are reduced and the bending stiffness is increased. It is to promote the chapter conversation.

FIG. 1 shows an example in which the above-mentioned method is applied. A prestress is introduced to the upper portion of the girder at which the moment is generated, and a crack is generated at the upper portion of the girder at which the moment is generated. And the rigidity against the girder is increased, so that the long-term conversation of the span is aimed at.

More specifically, FIG. 1 is a view of a steel girder 10, which is a central portion of a girder, and which is subjected to a tension The pretensioning steel plate 30 is temporarily fixed to the abdomen portion 16 or the lower flange 14 of the fixing member 32 by a tack weld with the fixing device 32 attached thereto, After the PS wire 40 is placed and tightened on the device 32, the pre-tensioning steel plate 30 is fixed by fillet welding over the entire length of the steel girder 10 and the pre- 30, the prestress is introduced into the steel girder 10 while the tensile force introduced into the end of the steel girder 10 is removed. The pretensioning steel plate 30 and the PS steel wire 40 are installed in the same manner as the steel girder 10 to the upper flange 22 of the rigid member 20 (the part where the legend acts as the end portion of the girder) And tensed so that a prestress is also introduced into the rigid member 20 (see FIG. 1 (a)).

After the steel girder 10 and the rigid member 20 with the prestress introduced thereto are completed, they are first transported to the site, and then the rigid member 20 is first installed on the wall portion 50 (Fig. 1 (b) (See FIG. 1 (c)), the steel girder 10 is joined to the steel girder 10 (see FIG. 1 (c)) by using the connecting plate 60 between the rigid members 20 ) And the rigid member (20) by putting the upper plate concrete into place and completing the concrete pouring to the right corner part together.

Therefore, by introducing the prestress into each part of the girder, the raymen bridge according to the above-described conventional technique can minimize the cracks in the right corner and reduce the cross section of the girder while reducing the length of the girder.

However, the above-described conventional technique requires a separate member, equipment and attraction force for introducing the steel girder 10 and the rigid member 20 into the prestress, In order to perform the connection work, a temporary band is installed in the lower part thereof or the steel girder 10 is to be coupled with the rigid member 20 in a heavy equipment such as a crane, so that the installation cost is excessively increased, There is a problem that there is a lot of possibility to occur. In addition, when the installation interval and the cross-sectional direction of the rigid member 20 do not exactly coincide with the length and the cross-sectional direction of the steel girder 10, the error correction is not easy and a bad installation occurs.

KR 10-1223699 B1

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a method and apparatus for connecting a girder member to a girder in a site without any additional installation of a temporary vent or a crane, The present invention is to provide a girder installation structure of a ramen bridge in which the bending stiffness is increased by the weight of the girder member during the construction process of the bridge without installing additional tension members and tensioning.

According to a preferred embodiment of the present invention to solve the above-described problems, there is provided a concrete structure comprising: a girder member for supporting a load on an upper portion of a composite concrete, a lower support member for supporting the girder member and transmitting the load to a concrete support, And a connection adjusting member for connecting the girder member and the lower supporting member, wherein the girder member comprises a pair of connecting girders bolted to the connection adjusting member and a center girder located between the connecting girders, And a connecting portion between the connecting girder and the center girder is provided with a means for preventing the center girder from being turned off.

According to another preferred embodiment of the present invention, a) an adjustment bracket having a first horizontal slot is provided at one end thereof, and a lower flange and a connection web is provided at the other end thereof

A pair of connecting girders formed with insertion brims of a cross section; A pair of insert webs at each end and a separate lower flange

A center girder formed with a cam groove formed upwardly with respect to the longitudinal direction with an insertion groove portion of a cross section formed therein; Preparing a connection adjusting member comprising a girder fixing portion having upper and lower through holes and a horizontal insertion groove at a lower portion and a girder fixing portion having a curved upper surface; b) installing a lower support member on the concrete support, and installing a horizontal plate on the upper end of the lower support member so as to protrude outward; c) inserting the protruding portion of the horizontal plate into the horizontal insertion groove of the connection adjusting member so that the connection adjusting member is installed on the lower supporting member; d) inserting the connecting girder into the girder mounting portion of the connection adjusting member, inserting the adjusting bolt into the first horizontal slot of the adjusting bracket and the through hole of the girder fixing portion to thereby assemble the connecting girder and the connection adjusting member; e) The connecting web of the insertion protrusion formed on the connecting girder is inserted between the insertion webs of the insertion groove formed in the center girder and the lower flange of the insertion groove is mounted on the lower flange of the insertion protrusion, So that the camber of the center girder is firstly relaxed by its own weight; Moving the connecting girder back and forth or rotating it up and down so that the connecting webs and the connecting webs are aligned with each other and the central girder and the connecting girder are joined together by bolts to form the integrated girder member; f) secondarily modifying the degree of the camber by the load of the upper plate concrete by placing the upper plate concrete on the girder member; g) assembling the connecting girder and the connecting adjusting member at the same time; and h) laying the supporting member concrete to the lower supporting member so that the connection adjusting member is embedded, so as to laminate the girder member and the lower supporting member.

A center girder formed with a cam groove formed upwardly with respect to the longitudinal direction with an insertion groove portion of a cross section formed therein; Preparing a connection adjusting member comprising a girder fixing portion having upper and lower through holes and a horizontal insertion groove at a lower portion and a girder fixing portion having a curved upper surface; b) installing a lower support member on the concrete support, and installing a horizontal plate on the upper end of the lower support member so as to protrude outward; c) inserting the protruding portion of the horizontal plate into the horizontal insertion groove of the connection adjusting member so that the connection adjusting member is installed on the lower supporting member; d) inserting the connecting girder into the girder mounting portion of the connection adjusting member, inserting the adjusting bolt into the first horizontal slot of the adjusting bracket and the through hole of the girder fixing portion to thereby assemble the connecting girder and the connection adjusting member; e) The connecting web of the insertion protrusion formed on the connecting girder is inserted between the insertion webs of the insertion groove formed in the center girder and the lower flange of the insertion groove is mounted on the lower flange of the insertion protrusion, ; f) lowering the degree of the camber by the load of the upper plate concrete by placing the upper plate concrete in the center girder; g) correcting the connecting position of the connecting girder and the center girder by moving the connecting girder back and forth, or rotating it up and down, and then combining them to form an integrated girder member; h) assembling the connecting girder and the connecting adjusting member at the same time; (i) concurrently pouring the supporting member concrete to the upper plate concrete and the lower supporting member with respect to the connecting girder portion so that the connection adjusting member is embedded.

The present invention can omit the use of heavy equipment such as a crane for placing a medal for a temporary vent or a center girder, and it is unnecessary to install a tension member and load equipment for the introduction of a prestress to reduce costs such as materials and labor costs In addition, since the process is reduced, the air is greatly reduced, which makes it possible to construct a very economical ramen bridge.

In addition, since the center girder is securely mounted on the connecting girder, it is possible to safely and easily perform not only the connection work but also the upper work, and the correction of the construction error is very easy, .

In addition, the present invention enables a prestress to be introduced so as to efficiently cope with bending moments in different directions occurring in each of the center girder and the connecting girder, and it is possible to optimize the cross section of the girder member, Thereby minimizing the occurrence of cracks.

Also, since the connection adjusting member of the present invention is manufactured by an independent member, it is installed only by fitting and bolt assembly, thereby reducing field welding and versatility applicable to various types of girder installation structures.

1 is a cross-sectional view showing a process of constructing a ramen bridge by a conventional technique.
2 is a perspective view for explaining an installation structure of a girder according to an embodiment of the present invention.
3 is a perspective view showing the respective structures of a center girder, a connecting girder, and a connection adjusting member constituting the girder installation structure.
4 is an exploded perspective view for explaining a connection relation between the connecting girder, the connection adjusting member and the lower supporting member.
5 is a perspective view illustrating a process of connecting a center girder and a connecting girder in sequence.
Figs. 6 to 15 are cross-sectional views and perspective views illustrating a process of constructing a ramen bridge according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in order to obscure or obscure the technical idea of the present invention due to the detailed description of the known structure in describing the present invention, the description of the structure of the above known structure will be omitted.

FIG. 2 is a perspective view of a girder installation structure according to an embodiment of the present invention. FIG. 3 is a perspective view illustrating a girder installation structure according to an embodiment of the present invention. 4 is a perspective view showing the configuration of the connection adjusting member 200 which enables the correction of the load adjusting member 200 or the introduction of the prestress into the end portion of the girder member 100. FIG 4 is a perspective view of the connection adjusting member 200, And the member 300 according to an embodiment of the present invention.

The girder installation structure of the present invention is basically made up of a girder member 100, a lower support member 300, and a connection adjustment member 200 therebetween, as shown in FIG.

The girder member 100 is composed of a pair of connecting girders 120 as a structural member for supporting the upper load while being combined with the upper plate concrete 400 and a central girder 110 positioned between the connecting girders 120 .

3 (a), the connecting girder 120 is provided with an adjusting bracket 122 at one end thereof and a lower flange 121b and a connecting web 121a at the other end thereof.

And an insertion protrusion 121 of a cross section is formed.

The adjustment bracket 122 serves as a bracket for coupling the connecting girder 120 to the connection adjusting member 200 and also serves as a bracket for connecting the connecting girder 120 to the center girder 110, Thereby correcting an error or deformation of the girder member 100, thereby realizing precision and ease of construction. On the other hand, the adjustment bracket 122 serves as a lever for introducing a prestress to the end of the girder member 100, thereby preventing cracks that may occur in the right corner of the rammen bridge.

To this end, the adjustment bracket 122 is provided with a first horizontal long hole 122a extending in the longitudinal direction so that the connecting girder 120 can be moved back and forth with reference to the adjustment bolt 230 described later.

As described above, at the end of the connecting girder 120 connected to the center girder 110, the lower flange 121b and the connecting web 121a are formed

3 (b), a pair of insertion webs 111a and a pair of insertion projections 121 are formed at both side ends of the center girder 110. The insertion projections 121 are formed at both ends of the center girder 110. [ And a flange 111b

And an insertion groove portion 111 having a shape of a cross section is formed.

The center girder 110 can be moved back and forth with respect to the connecting girder 120 in a state where the insertion protrusion 121 is inserted into the insertion groove 111. [

The center girder 110 is formed so as to form a convex camber upward in the longitudinal direction. The camber may be formed only with respect to a portion excluding both end portions including the insertion groove 111 as shown in FIG. 9, or may be formed with respect to the entire length of the center girder 110 as shown in FIG. 13 have.

Also, although not shown, casing concrete may be installed in a lower flange.

The connection adjustment member 200 shown in FIG. 3C connects the girder member 100 in which the center girder 110 and the connection girder 120 are integrated to the lower support member 300, The bracket 122 is used as a means for correcting a construction error occurring during work such as integration of the girder member 100 and introducing a prestress to the end of the girder member 100.

Further, the connection adjusting member 200 can actively cope with a change in the horizontal length of the girder member 100, which is elongated when the camber of the center girder 110 is relaxed, thereby facilitating introduction of the prestress by camber relaxation .

The connection adjustment member 200 is formed of a separate member separate from the girder member 100 and the lower support member 300 and is supported by the lower support member 300 and the girder member 100 only by means of fitting and bolt assembling in the field, So that it is possible to apply not only the ease of construction but also the girder installation structure of various sizes by omitting the work such as welding.

The connection adjustment member 200 includes a girder mounting portion 210 on which an end portion of the girder member 100, that is, an end portion of the connection girder 120 is placed, and a lower support member 300, (220).

It is preferable that the upper surface of the girder receiving portion 210 is formed into a convex curved surface so that the connecting girder 120 can be rotated up and down with the side on which the connecting girder 120 touches as a fulcrum.

The bottom surface 211 of the girder mounting part 210 may further include a fixing hole 211a for preventing the mounting of the casing 201. The front surface 212 may be provided with a connection reinforcing bar Not shown) may be further provided. The shear connecting members 140 to the connecting reinforcing bars can prevent cracking of the sheath portion due to the concrete pouring.

The girder fixing portion 220 includes an upper fixing member 221 coupled to the girder member 100 and a lower fixing member 222 coupled to the lower supporting member 300.

The adjustment bracket 122 is coupled to the connection adjustment member 200 by the adjustment bolt 230 passing through the first horizontal slot 122a and the upper fixing member 221 of the connection adjustment member 200, A through hole 221a through which the adjustment bolt 230 can be inserted is provided. The lower fixing member 222 of the girder fixing unit 220 is provided with a horizontal insertion groove 222a for fixing the connection adjusting member 200 to the lower supporting member 300.

The lower fixing member 222 may be formed of a single member, but may be constructed by assembling two plate members as shown in FIG. 3 (c). Of course, the entire connection adjustment member 200 may be formed in the form of a precast block in which the upper fixing member 221 and the lower fixing member 222 are integrated into a single member.

When the two plate members are assembled to constitute the lower fixing member 222 as described above, the fastening holes 220a are provided in the plate members and the width of the horizontal insertion groove 222a is adjusted by the fastening bolts 220b Which allows for versatility that can accommodate the various thicknesses of the horizontal plate 310 described below.

The lower support member 300 for supporting the girder member 100 and transmitting the load acting on the girder member 100 to the concrete support body 510 via the connection adjusting member 200 is preferably made of an H- And a horizontal plate 310 is installed on the upper end of the horizontal plate 310. The horizontal plate 310 is protruded outward and inserted into the horizontal insertion groove 222a of the connection adjusting member 200, 200 are fixed to the lower supporting member 300.

4, when the horizontal adjustment unit 300 is installed on the horizontal plate 310 at the upper end of the lower support member 300, the coupling adjustment member 200, the connection adjustment member 200, The protruding portion of the horizontal plate 310 is inserted into the horizontal insertion groove 222a in the state where the lower surface 211 of the girder mounting portion 210 of the connecting member 200 is placed, The adjustment bolt 230 is moved to the first horizontal slot 221 of the adjustment bracket 122 in a state where the end of the connection girder 120 is fixed to the girder mounting portion 210 of the connection adjusting member 200 122a and the through hole 221a of the girder fixing part 220 so as to be bolted to each other to complete the installation of the connecting girder 120 on the lower supporting member 300. [

The connecting girder 120 can be moved forward and backward by using the first horizontal slot 122a even when the connecting girder 120 is fixed to the lower supporting member 300, The connecting girder 120 can be rotated up and down using the pulling and the pulling so that the correction of the installation errors occurring when the center girder 110 is connected to the connecting girder 120, .

5 illustrates a process of connecting the center girder 110 to the connecting girder 120 in sequence.

The connecting girder 120 and the center girder 110 are provided with the insertion protrusions 121 and the insertion grooves 111. The connection web 121a of the insertion protrusions 121 is inserted into the insertion grooves 111 The lower flange 111b of the insertion groove 111 is inserted into the lower flange 121b of the insertion protrusion 121 as shown in Fig. 5A (see Fig. 5A) {See FIG. 5 (b)}.

The connecting structure between the connecting girder 120 and the center girder 110 allows a subsequent operation to be performed in a state where the center girder 110 is mounted on the connecting girder 120, And the use of heavy equipment such as a crane for lifting the center girder 110 can be excluded, thereby improving the economical efficiency.

In addition, the connecting portion between the connecting girder 120 and the center girder 110 is further provided with a means for preventing the center girder 110 from falling, thus securing the safety of the operator.

The conduction preventing means is provided by providing a second horizontal slot 131 extending in the longitudinal direction on at least one of the connecting web 121a of the connecting girder 120 and the insertion web 111a of the center girder 110. [ Therefore, the second horizontal slot 131 may be provided in the other horizontal slot 131 except for the second horizontal slots 131. In this case, however, unnecessary edge defects may occur. Therefore, It is preferable to provide a fixing bolt hole 133 having the same diameter as the release preventing bar 132 inserted into the second horizontal slot 131 as shown in FIG.

5 (c), when the center girder 110 is mounted on the connecting girder 120 and the connecting web 121a is fitted in the insertion web 111a, The center girder 110 is inserted into the horizontal slot 131 and the fixing bolt hole 133 so that the center girder 110 can be moved forward and backward for correction of the installation error with respect to the connecting girder 120, Since the connection between the connection web 121a and the insertion web 111a is maintained, the center girder 110 has no room to be transferred even during the subsequent operation, thereby improving the ease of operation and the safety of the operator.

The strong coupling between the center girder 110 and the connecting girder 120 may be performed immediately after the center girder 110 is mounted on the connecting girder or after the top plate concrete 400 is installed on the center girder 110 The order of progress of the work depends on the scale of the bridge, the construction structure of the upper plate concrete (400), the degree of introduction of precast, and the working conditions of the site. Explain.

Next, a method of constructing a ramen bridge using the example of the most preferable girder installation structure of the present invention explained so far will be described.

FIGS. 6 to 11 show steps of a method of constructing a ramen bridge using the girder installation structure according to the first embodiment of the present invention.

As described above, the time at which the center girder 110 and the connecting girder 120 are strongly coupled and the time at which the top plate concrete 400 is installed on the center girder 110 can be different from each other. In this embodiment, The upper girder 110 and the connecting girder 120 are rigidly joined together and then the upper plate concrete 400 is poured onto the upper portions of the girder 110 and the connecting girder 120. Specifically, Preparing the adjusting member (200), respectively; b) installing a lower support member (300) on the concrete support (510); c) installing the connection adjusting member (200) on the lower support member (300); d) mounting and fixing the connecting girder (120) to the connection adjusting member (200); e) mounting a center girder 110 between a pair of connecting girders 120, and correcting the installation error while rigidly joining them to form an integrated girder member 100; f) placing the top plate concrete (400) on the girder member (100); g) assembling the connection adjusting member 200 and the connecting girder 120; h) Rendering the girder member (100) and the lower support member (300). These will be described in more detail as follows.

a) Connecting girder (120), Central girder (110) and The connection adjusting member 200 (See Fig. 3);

The connecting girder 120, the center girder 110, and the connection adjusting member 200 are each manufactured in the factory in the following form and transferred to the site.

One pair of connecting girders 120 is prepared and is provided with an adjusting bracket 122 having a first horizontal slot 122a at one end and a lower flange 121b and a connecting web 121a at the other end.

So that the insertion protrusion 121 of the cross section is formed.

The center girder 110 is composed of a pair of insertion webs 111a and a separated lower flange 111b at both ends so as to correspond to the configuration of one end of the connecting girder 120

And the cam groove is formed so as to be convex upward with respect to the longitudinal direction while the insertion groove portion 111 having the shape of a cross section is formed. In this embodiment, it is preferable that the camber formed on the center girder 110 is formed only with respect to the center portion excluding the both end portions including the insertion groove portion 111.

A casing concrete may be previously formed on the lower flange portion of the center girder 110. [

The connection adjusting member 200 includes a girder fixing part 220 having upper and lower through holes 221a and a horizontal insertion groove 222a at the lower part thereof and a girder mounting part 210 having a curved upper surface, . The lower surface 211 of the girder receiving portion 210 is provided with a pivot preventing retention hole 211a.

b) installing the lower support member 300 on the concrete support 510 (see FIG. 6);

The lower support member 300 is installed on the concrete support body 510 constituting the alternation by using an anchor or the like and the horizontal plate 310 is installed on the upper end of the lower support member 300 so as to protrude outward.

The degree of protrusion outward from the side surface of the lower supporting member 300 corresponds to the depth of the horizontal insertion groove 222a provided in the connection adjusting member 200.

The lower support member 300 may be a conventional H-shaped steel, and a reinforcing rib may be further provided between the H-shaped steel and the horizontal plate 310.

c) installing the connection adjusting member 200 on the lower support member 300 (see Fig. 7);

The protruding portion of the horizontal plate 310 installed on the upper end of the lower support member 300 is inserted into the horizontal insertion groove 222a of the connection adjustment member 200, So that the connection adjusting member 200 is mounted on the lower supporting member 300. At this time, the lower surface 211 of the girder mounting portion 210 of the connection adjusting member 200 is brought into contact with the upper surface of the horizontal plate 310.

The horizontal plate 310 is bolted between the lower surface 211 and the horizontal plate 310 by using the fixing hole 211a provided on the lower surface 211 of the girder receiving part 210, The connection adjusting member 200 is prevented from being detached or pushed out of the lower supporting member 300 even if a load is applied.

d) In the connection adjusting member 200 The connecting girder 120 Mount Associate Step (see FIG. 8);

When the horizontal plate 310 of the lower supporting member 300 is inserted into the horizontal insertion groove 222a of the connection adjusting member 200 and the fixing installation for the connection adjusting member 200 is completed, The connecting girder 120 is placed on the girder receiving portion 210 of the connection adjusting member 200 so as to be positioned above the girder receiving portion 220 of the member 200. [ At this time, the first horizontal long hole 122a of the adjustment bracket 122 and the through hole 221a of the girder fixing portion 220 should be in a vertically communicated shape.

In this state, the adjustment bolt 230 is inserted into the first horizontal slot 122a of the adjustment bracket 122 and the through hole 221a of the girder fixing portion 220 to fasten the connection girder 120 and the connection adjustment member 200).

This completes the primary fixing of the connecting girder 120 to the lower supporting member 300 via the connection adjusting member 200.

e) a pair of Connecting girder (Not shown) The center girder 110 After mounting, Construction error While calibrating, Steel Integrated The girder member 100 (See Figs. 5, 9 and 10);

After completion of the installation of the connecting girder 120 on both ends of the bridge through the step d), the center girder 110 is placed between the pair of connecting girders 120.

The connection web 121a of the insertion protrusion 121 formed in the connection girder 120 is inserted between the insertion web 111a of the insertion groove 111 formed in the center girder 110, The flange 111b is mounted on the lower flange 121b of the insertion protrusion 121 so that the center girder 110 is placed on the connecting girder 120. [

At this time, a means for preventing the central girder 110, which is fixed to the connecting girder 120, from being conducted due to carelessness during work can be further added.

A second horizontal slot 131 is provided in at least one of the connecting web 121a and the insertion web 111a and a fixing bolt hole 133 is provided in the remaining web, The connection web 121a and the insertion web 111a can be moved back and forth while the connection web 121a and the insertion web 111a can be moved back and forth by inserting the release prevention bar 132 in a state in which the fixing bolt hole 133 and the fixing bolt hole 133 are communicated. So that they can not be separated from each other.

Since the center girder 110 is placed on the connecting girder 120 fixed to the lower supporting member 300 in a state in which the center girder 110 is prevented from being transferred and released, It is possible to economically and safely carry out the final connection work and the subsequent work for the upper part without having to mediate the center girder 110 with the heavy equipment.

The center girder 110 and the connecting girder 120 are tightly coupled with each other after the center girder 110 is fixedly mounted.

When the camber is mounted on the connecting girder 120, the camber is primarily relaxed by a predetermined height (? 1) by its own weight, and the primary prestress is introduced.

When the camber of the center girder 110 is relaxed, the center girder 110 is extended in its horizontal length so that the insertion groove 111 moves toward the connecting girder 120, The coupling holes 150 may be aligned with each other due to a difference in the vertical accuracy of the lower support member 300 or the degree of relaxation of the camber of the center girder 110 .

At this time, the first horizontal slot 122a provided in the adjustment bracket 122 of the connecting girder 120 allows the above-mentioned construction error to be corrected. That is, the connecting girder 120 is fixed to the connection adjusting member 200 through the adjusting bolt 230, but it can be moved back and forth due to the first horizontal slot 122a, and the tightening degree of the adjusting bolt 230 So that it can be rotated up and down.

The connecting girder 120 is moved back and forth or up and down to correct the connecting position between the connecting girder 120 and the center girder 110 and then the center girder 110 and the connecting girder 120, (150) by bolts to form an integrated girder member (100).

On the other hand, when the camber is formed only in the central portion of the center girder 110, the bolt fastening with the connecting girder 120 becomes easier since the insertion groove portion 111 at both end ends remains in a horizontal state.

f) In the girder member 100 The top plate concrete (400) (See Fig. 11);

When the integration of the girder member 100 is completed, the upper plate concrete 400 is laid on the upper plate concrete 400. The load of the upper plate concrete 400 is used as a means for introducing the secondary prestress to the girder member 100. [

In other words, the camber of the center girder 110, which is partially alleviated by the step e), is subjected to the prestress again to the girder member 100 while the height of the camber of the center girder 110 is relaxed secondarily by the additional weight of the top plate concrete 400 do.

In order to efficiently introduce the prestressing in this step, the upper plate concrete 400 is pushed into the both ends of the girder member 100 starting from the central portion of the center girder 110 where the camber is formed .

The horizontal length of the girder member 100 is further stretched as the upper plate concrete 400 is installed so that the first horizontal elongated hole 122a provided in the adjustment bracket 122 allows the elongation of the girder member 100 Thereby making it possible to introduce a prestress.

In this step, a prestress is introduced into the center girder 110 in the same manner as in the step e), and the upper plate concrete 400 to be installed on the upper part of the girder member 100 without using a tension member or a heavy equipment for applying a load By introducing the prestress into the center girder 110 by using its own weight, it is possible to shorten the air by simplifying the work process as well as the economical efficiency.

g) The connection adjusting member 200 and The connecting girder 120 Assembled step;

When the installation of the upper plate concrete 400 is completed and the deformation of the girder member 100 and the introduction of the prestress are completed, the main assembly of the connecting girder 120 and the connection adjusting member 200 using the adjusting bolt 230 Conduct.

At this time, another prestress can be further introduced to both ends of the girder member 100.

If the girder member 100 and the lower supporting member 300 are laminated by the next step, a large amount of moment is generated at the connecting portions of the girder member 100 and the lower supporting member 300, &Lt; / RTI >

Therefore, in this step, the adjusting bolt 230 is further tightened to introduce the prestress so that the upward force is generated in the girder member 100, and by making it correspond to the above-mentioned moment, the occurrence of cracks in the right-angled portion can be minimized .

h) The girder member 100 The lower support member 300 Rahmenhashiki Step (see FIG. 12);

When the final connection between the girder member 100, the connection adjusting member 200 and the lower supporting member 300 is completed, the connecting member 200 is inserted into the right corner portion and the lower supporting member 300 The supporting member concrete 520 is laid so that the girder member 100 and the lower supporting member 300 are laminated.

When each of the above steps is completed, finishing work such as packing and railing is completed to complete the ramen bridge. Reference numeral 160 denotes a connecting plate for strong coupling between the center girder 110 and the connecting girder 120.

In the first embodiment of the present invention relating to the construction method of the ramen bridge, after the center girder 110 and the connecting girder 120 are joined together, the upper plate concrete 400 is placed on the upper portion of the girder 110, In the second embodiment to be described next, the top plate concrete 400 is firstly inserted into the center girder 110 so that the weight of the center girder 110 and the weight of the top plate concrete 400 There is a difference in that the center girder 110 and the connecting girder 120 are joined to each other after the prestress is introduced into the central girder 110 by the action of their own weight.

That is, the method of constructing the ramen bridge according to the second embodiment of the present invention comprises the steps of: a) preparing the connecting girder 120, the center girder 110 and the connection adjusting member 200 respectively; b) installing a lower support member (300) on the concrete support (510); c) installing the connection adjusting member (200) on the lower support member (300); d) mounting and fixing the connecting girder (120) to the connection adjusting member (200); e) mounting a center girder (110) between a pair of connecting girders (120); f) placing the top plate concrete (400) on the center girder (110); g) rigidly connecting the connecting girder 120 and the center girder 110 after correcting the installation error; h) assembling the connection adjusting member (200) and the connecting girder (120); i) Rendering the girder member 100 and the lower support member 300.

Therefore, in the second embodiment, description will be made only of the step e) which is different from the first embodiment, and the description of the overlapping parts will be omitted from the description of the corresponding steps in the first embodiment.

e) a pair of Connecting girder (Not shown) The center girder 110 (See Figs. 5 and 13);

When the installation of the connecting girder 120 on both ends of the bridge is completed, the center girder 110 is placed between the pair of connecting girders 120 and the center girder 110 is prevented from falling The operations are not different from the first embodiment of the present invention.

In this step, however, the center girder 110 is not rigidly coupled to the connecting girder 120 but the center girder 110 is simply mounted on the connecting girder 120, so that the introduction of the prestress in the next stage can be efficiently performed .

f) In the center girder 110 The top plate concrete (400) (See Fig. 14);

When the center girder 110 is fixed to the connecting girder 120, the upper plate concrete 400 is placed on the central girder 110 where the camber is formed, so that the weight of the center girder 110 and the upper plate concrete 400 ) Is applied to reduce the degree of the camber.

In this step, since the upper plate concrete 400 is installed only on the central girder 110, the reinforcing bars are embedded in the joint part of the center girder 110 so as to ensure integration with the remaining upper plate concrete 400, It is preferable that the fastening operation between the connecting girder 120 and the center girder 110 to be performed in the next step is not interrupted.

g) Construction error Calibrated after The connecting girder 120 and The center girder 110 Strong Step (see Fig. 15);

When the camber of the center girder 110 is relaxed by the above step f), the center girder 110 is stretched in its horizontal length, and the connecting girder 120 is moved back and forth and up and down while rotating the insertion web 111a After correcting the installation error such as matching the fastening holes 150 provided in the connecting web 121a, the fastening holes 150 are bolted together to form the integrated girder member 100 by the tightening.

h) The connection adjusting member 200 and The connecting girder 120 Assembled step;

When the integration of the prestressed girder members 100 is completed, the connecting girder 120 and the connection adjusting member 200 are assembled using the adjusting bolts 230.

At this time, it is possible to further introduce a prestress to both ends of the girder member 100, which is not different from that of the first embodiment.

i) The girder member 100 The lower support member 300 Rahmenhashiki step;

When the final connection between the girder member 100, the connection adjusting member 200 and the lower supporting member 300 is completed, The support member concrete 520 for the lower support member 300 and the girder member 100 are concurrently poured into the girder member 100 and the lower support member 300.

When each of the above steps is completed, finishing work such as packaging and railing installation is completed in the same manner as in the first embodiment to complete the ramen bridge.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious that it will be possible to carry out various modifications thereof. It is therefore intended that such modifications are within the scope of the invention as set forth in the claims.

100; A girder member 110; Central girder
111; An insertion groove portion 111a; Insert web
111b, 121b; A lower flange 120; Connecting girder
121; An insertion protrusion 120a; Connecting web
122; Adjustment bracket 122a; The first horizontal slot
131; A second horizontal slot 132; Release Leads
133; A fixing bolt hole 140; Shear connector
150; Fastening ball 200; The connection adjusting member
210; A girder mounting part 220; Girder fixing section
221; An upper fixing member 221a; Through-hole
222; A lower fixing member 222a; Horizontal insertion groove
230; Adjusting bolt 300; The lower support member
310; A horizontal plate 400; Top plate concrete
510; Concrete support 520; Support member concrete

Claims

A lower support member 300 for supporting the girder member 100 and transmitting the load to the concrete support body 510, and a lower support member 300 for supporting the girder member 100, And a connection adjusting member 200 connecting between the girder member 100 and the lower supporting member 300,
The girder member 100 is composed of a pair of connecting girders 120 bolted to the connection adjusting member 200 and a center girder 110 located between the connecting girders 120, The center girder 110 is provided at the connection portion between the center girder 110 and the center girder 110,
An adjustment bracket 122 having a first horizontal slot 122a is installed at one end of the connecting girder 120; The connection adjusting member 200 includes a girder fixing part 220 having upper and lower through holes 221a and a girder fixing part 210 on which an end of the connecting girder 120 is placed; Wherein the connecting girder 120 and the connection adjusting member 200 are connected to each other by connecting the adjusting bolt 230 to the first horizontal elongated hole 122a and the through hole 221a. Installation structure.

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2. The girder installation structure according to claim 1, wherein the upper surface of the girder installation part (210) is formed of a convex curved surface so that the connection girder (120) can be pivoted up and down.

[3] The apparatus of claim 1, wherein the connecting girder (120) has a lower flange (121b) and a connecting web (121a)

And a pair of insertion webs 111a and a separate lower flange 111b are formed at both side ends of the center girder 110

The connecting web 121a of the insertion protrusion 121 is inserted between the insertion webs 111a of the insertion slot 111 and the lower flange 111b of the insertion slot 111 Is mounted on the lower flange (121b) of the insertion protrusion (121).

The girder girder girder (1) according to claim 4, characterized in that the turn preventing means is provided by providing a second horizontal slot (131) in at least one of the connecting web (121a) and the insertion web Installation structure.

2. The apparatus according to claim 1, wherein a horizontal insertion groove (222a) is provided below the girder fixing part (220), and a horizontal plate (310) The protruding portion of the horizontal plate 310 is inserted into the horizontal insertion groove 222a while the lower surface of the girder mounting portion 210 of the connection plate 200 is placed on the horizontal plate 310, (300). The girder installation structure of the raymen bridge capable of correcting the error.

In a method for constructing a ramen bridge,
a) an adjusting bracket 122 provided with a first horizontal slot 122a at one end and a lower flange 121b and a connecting web 121a at the other end

A pair of connecting girders 120 on which an insertion protrusion 121 of a cross section is formed; A pair of insertion webs 111a and a separate lower flange 111b at both ends thereof

A center girder 110 having a cam groove formed upwardly with respect to the longitudinal direction and formed with an insertion groove 111 having a shape of a cross section; A connection adjusting member 200 including a girder fixing portion 220 having a through hole 221a and a horizontal insertion groove 222a at a lower portion thereof and a girder mounting portion 210 having a curved upper surface, , Respectively;
b) installing a lower support member (300) on the concrete support (510) and installing a horizontal plate (310) to protrude outward at the upper end of the lower support member (300);
c) inserting the projecting portion of the horizontal plate 310 into the horizontal insertion groove 222a of the connection adjustment member 200 to install the connection adjustment member 200 on the lower support member 300;
d) The connecting girder 120 is mounted on the girder mounting portion 210 of the connection adjusting member 200 and the adjusting bolt 230 is fixed to the first horizontal elongated hole 122a of the adjusting bracket 122 and the girder fixing portion 220 Through the through hole 221a of the coupling girder 120 to fasten the coupling girder 120 and the coupling adjusting member 200 together;
e) The connection web 121a of the insertion protrusion 121 formed in the connection girder 120 is inserted between the insertion web 111a of the insertion groove 111 formed in the center girder 110, The center girder 110 is mounted between the pair of connecting girders 120 such that the lower flange 111b is mounted on the lower flange 121b of the insertion protrusion 121 and the camber of the center girder 110 Firstly relaxed; The connecting girder 120 is moved back and forth or up and down so that the connecting webs 111a and the connecting webs 121a are aligned with each other and the bolts are fastened to the center girder 110) and the connecting girder (120) so as to form an integrated girder member (100);
f) secondarily modifying the degree of the camber by the load of the upper plate concrete (400) by placing the upper plate concrete (400) on the girder member (100);
g) assembling the connecting girder 120 and the connection adjusting member 200 in the main body;
and h) stepping the girder member 100 and the lower supporting member 300 by placing the supporting member concrete 520 on the lower supporting member 300 so that the connection adjusting member 200 is embedded therein Construction method of raymen bridge characterized by.

A center girder 110 having a cam groove formed upwardly with respect to the longitudinal direction and formed with an insertion groove 111 having a shape of a cross section; A connection adjusting member 200 including a girder fixing portion 220 having a through hole 221a and a horizontal insertion groove 222a at a lower portion thereof and a girder mounting portion 210 having a curved upper surface, , Respectively;
b) installing a lower support member (300) on the concrete support (510) and installing a horizontal plate (310) to protrude outward at the upper end of the lower support member (300);
c) inserting the projecting portion of the horizontal plate 310 into the horizontal insertion groove 222a of the connection adjustment member 200 to install the connection adjustment member 200 on the lower support member 300;
d) The connecting girder 120 is mounted on the girder mounting portion 210 of the connection adjusting member 200 and the adjusting bolt 230 is fixed to the first horizontal elongated hole 122a of the adjusting bracket 122 and the girder fixing portion 220 Through the through hole 221a of the coupling girder 120 to fasten the coupling girder 120 and the coupling adjusting member 200 together;
e) The connection web 121a of the insertion protrusion 121 formed in the connection girder 120 is inserted between the insertion web 111a of the insertion groove 111 formed in the center girder 110, Placing the center girder 110 between the pair of connecting girders 120 such that the lower flange 111b is mounted on the lower flange 121b of the insertion protrusion 121;
f) modifying the degree of the camber by the load of the upper plate concrete (400) by placing the upper plate concrete (400) on the central girder (110);
g) correcting the connecting position of the connecting girder 120 and the center girder 110 by moving the connecting girder 120 back and forth or rotating up and down, and then combining them to form an integrated girder member 100;
h) assembling the connecting girder (120) and the connecting adjusting member (200);
i) The top plate concrete 400 and the supporting member concrete 520 for the lower supporting member 300 are poured into the connection girder 120 so that the connection adjusting member 200 is embedded, And a step of raising the member (300).

The method of claim 7 or 8, wherein at least one of the connecting web (121a) or the insertion web (111a) is provided with a second horizontal slot (131) The method further comprises connecting the connecting web 121a and the insertion web 111a with the second horizontal slot 131 and the release preventing bar 132 inserted therein so that the web 111a can move back and forth. A method of constructing a ramen bridge.

The method as claimed in claim 7 or 8, wherein the step of assembling the connection adjusting member (200) and the connecting girder (120) Further comprising the step of introducing a prestress corresponding to a moment to be generated at the end of the ramen bridge.