KR100579597B1 - Temporary construction system and the construction method using the same - Google Patents

Abstract

The present invention is installed in the lower structure of the branch portion bracket is raised to the point structure of the trapezoidal cross-sectional shape as a whole trapezoidal cross section so that the bending parent moment generated in the point portion in the construction construction can be changed to the bending constant moment, The present invention relates to a construction method with excellent construction and economic efficiency by allowing an upper structure including a perforated plate to be installed in a state in which a center span steel mold is supported therebetween.

Description

Temporary Construction System and the construction Method Using the Same}

Figure 1 illustrates a bridge, which is a conventional temporary facility.

Figures 2a, 2b, 2c, 2d and 2e shows the construction species of crosslinking as a temporary facility according to the present invention.

Figures 3a, 3b, 3c and 3d are diagrams showing the installation state of the branch stand of the present invention.

4A, 4B, 4C, 4D, 4E, and 4F illustrate examples of the branch pedestal of the present invention.

Figure 5 shows an embodiment of the support base of the present invention.

6 is a perspective view of a temporary system according to the present invention.

<Description of the symbols for the main parts of the drawings>

200: branch support 210: lower member

220: inclined member 220c: flange portion

230: Branch part upper steel 300: Branch part tension member

400a, 400b: Upper structure (hollow plate) 500: Supporting support

600: center span rigid

The present invention relates to a temporary installation system and a construction method thereof. More specifically, in order to install a temporary facility such as a bridge, etc., after installing substructures such as bridges and shifts using steel materials, the temporary structure is completed by installing the steel structure on the lower structure and finally installing the upper structure on the upper surface of the steel structure. It is about temporary construction method.

1 is a temporary steel beam (10, the lower structure) is installed at a predetermined distance using a conventional steel beam, and then the steel die (20, mold) is extended to the axial direction in the upper surface of the temporary pier, and the perforated plate ( 30 shows a conventional bridge 40 in the form of a front view as a temporary installation on the steel.

That is, in the conventional bridge 40, as shown in FIG. 1, H-type and I-type steel beams are generally installed vertically on the ground, and then horizontal beams 12 and / or inclined beams (between the vertical beams 11). 13) diagonally connected to install a plurality of temporary pier substructure 10 spaced apart at a predetermined interval (intersection), connecting the steel 20 between the temporary pier upper surface in the axial direction, and then the perforated plate on the steel It is constructed by installing the 30.

At this time, the forming position of the temporary piers 10 is a kind of point portion, when a work load including a perforated plate, a railing and a crane is loaded on the bridge, a bending parent moment (M-) is generated, and the center located between the temporary piers In the rigidity of the span, bending static moment (M +) is generated.

At this time, since the bending parent moment is generated at a significantly larger value (about twice as large) as the bending moment, the steel part installed at the point has sufficient cross-sectional force (bending moment, shear force) to resist the bending parent moment. It must be designed to have.

Therefore, when bridges need to be installed with longer spans, that is, the larger the bending moment (M-) of the point portion, the larger the inevitably larger dimension (height and width) of the member section of the rigid member. However, there is a problem in that there is a limit to installing a bridge between the long and long places.

In this case, a method of reducing the bending parent moment acting on the point part by introducing an additional stiffener 50 between the mold lower surface and the vertical beam spaced apart from the point part on the upper part of the temporary pier is also introduced. It is difficult to expect more than the function of the reinforcing member to disperse resistance, there was a limit that can not be a fundamental alternative to the construction of the bridge between the long and long.

Accordingly, the present invention provides a temporary installation system and a construction method which can be installed economically, with excellent construction and usability, shortening of air, and economical installation, while providing temporary installation between bridges. The purpose.

The present invention to achieve the above technical problem

First, by changing the structural structure of the branch part so that the bending parent moment acting on the branch part of the bridge is changed to the bending moment, the central span between the branch parts can be made longer and more economically and efficiently. It was.

To this end, the present invention is a lower member installed over the upper surface of the lower structure including a temporary pier; An inclined member installed to extend upwardly from both side ends of the lower member; And a branch portion upper steel formed by being raised between the upper portions of the inclined members.

Second, the upper part of the raised upper portion and the upper portion of the upper portion of the upper structure and the upper structure including the perforated plate in the state to be sagging downwards to install on it to integrate, and remove the tension force the upper portion of the upper portion and the upper structure A horizontal tension prestress was introduced at. As a result, the upper part of the upper part of the branch pedestal was able to resist the bending static moment more efficiently while acting integrally with the upper structure under the working load.

Third, the branch support base is made up and down largely to simplify the installation work in the field by simply assembling and installed in the branch to improve the workability in the cross-link installation as a temporary facility.

Fourth, on both sides of the lower end of the branch portion pedestal, the support for supporting the center span steel is further installed to facilitate the installation of the center span steel.

Thus, the provisional system of the present invention

A lower member installed over an upper surface of the lower structure including a temporary pier; An inclined member installed to extend upwardly from both side ends of the lower member; And a branch portion upper steel formed by being raised between the tops of the inclined members.

A branch tension member having one end connected to a lower surface of the upper part of the branch part so that tension is introduced in the vertical direction to the raised upper part of the raised part, and extending downward, the other end part being installed in the lower member to be fixed after tension; And

It is configured to include; the center span steel type connected between the branch portion pedestal,

Temporary construction method of the present invention

Installing a substructure including a temporary pier;

A lower member installed over the upper surface of the lower structure as an assembly steel structure having a trapezoidal cross section; An inclined member installed to extend upwardly from both side ends of the lower member; And installing a branch portion pedestal comprising: a branch portion upper steel formed by being raised between the tops of the inclined members.

One end is connected to the lower part of the upper part of the upper part, and the other end extends downward to tension and fix the tensioning point part connected to the lower member to introduce tension force in the upper and lower directions so that the treated upper part of the upper part sags downward. Making a step;

In the state where the upper structure is integrated with the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper portion of the upper steel portion is introduced into the tension, by dismantling the branch tension material in the horizontal direction to the upper portion of the upper portion and the upper structure Introducing a tensile prestress of the; And

It was configured to include; connecting the center span steel to the upper portion of the branch portion of the branch pedestal.

Hereinafter, in order to explain the present invention more clearly and easily, the best embodiment of the present invention will be described in detail with reference to the accompanying drawings on the basis of the construction method of crosslinking in temporary installation, embodiments according to the present invention are various As the shape may be modified, the scope of the present invention is not limited to the embodiments described below.

Figure 2a to 2e shows the cross-linking construction method according to the present invention in order.

First, as shown in FIG. 2A, temporary bridges 10 are installed on the ground to be spaced at predetermined intervals (interval length D) so that steel can be supported at a location only when bridges are installed. The temporary pier 10 is a rectangular parallelepiped form by installing a vertical beam 11 on the ground using a steel beam or steel pipe, and further install a horizontal beam 12 or an inclined beam 13 between the vertical beam (11). It can be installed as a steel assembly, such as, and acts as a substructure having a function of supporting the steel (230,600).

The temporary pier 10 is structurally equivalent to the point portion, when the steel is connected to both sides is generated bending bending moment (M-) as shown in FIG.

Next, as shown in FIG. 2B, the point portion pedestal 200 of the present invention is installed on the upper surface of the temporary pier 10 so that the point portion of the present invention can be changed into a bending positive moment (M +) system by the point pedestal. do.

At this time, the point pedestal 200 is a lower member 210 installed over the upper surface of the lower structure is a temporary pier 10 largely as shown in Figure 3a; Inclined members (220a, 220b; 220) installed to extend upwardly from both side ends of the lower member; And the upper portion of the branch portion 230 which is installed so as to be raised between the upper portions of the inclined member, and is manufactured as a trapezoidal cross-section assembly steel structure made of H-shaped or I-shaped steel beam as a whole. In order to facilitate the inclined member 220 to be segmented in the middle portion so as to be produced by the upper and lower point portion support (A, B).

First of all, look at the lower branch support (A),

As shown in FIG. 3a, the lower member 210, which is an H-type or I-type steel beam, is fastened horizontally to the upper surface of the temporary pier 10 by a connector such as a bolt.

Next, the lower inclined member 220a is installed to open upwardly from both side ends of the lower member 210, and the lower inclined member 220a is also made of an H-type or I-type steel beam.

As a result, it can be seen that the lower point support 200a is manufactured in a U-shaped cross-section as a whole. Although only the lower member 210a and the lower inclined member 220a have been described separately, it is preferable that the lower member 210a and the lower inclined member 220a are integrally manufactured at the factory and installed on the temporary pier 10 after being transported to the site.

Next, look at the upper branch support (B).

First, the upper inclined member 220b is fastened to the lower inclined member 220a by a connector such as a bolt, and the upper portion thereof is manufactured in the form of a flange portion 220c protruding horizontally in both sides.

Between the upper inclined member 220b is provided with the pointed upper portion of the upper steel 230, and the upper inclined member 220b and the upper portion of the upper portion 230 were described separately, but manufactured integrally at the factory After being transported to the site, it is to be installed by connecting the bolts and bolts to the lower branch support (A) already installed.

As a result, the point portions are moved to both sides based on the center line CL of the temporary pier 10 by the point portion pedestal 200 installed in the temporary pier 10 as shown in FIG. 3B, that is, the formation of the flange portion 220c. Since the branch portion is distributed to the site, the space length L2 between the branches may be relatively reduced as compared to the space length L1 of FIG. 1 as shown in FIG. 2F.

That is, as the actual span length is reduced, the bending parental force generated at the point portion is reduced as the span length is reduced, thereby enabling more efficient and economical rigid cross-sectional design based on the same span.

In addition, since both side ends of the upper portion of the branch portion 230 are supported by the inclined member 220, the bending portion of the upper portion of the upper portion 230 located in the branch portion as shown in Figure 2f (M1 +) is generated, the inclined member The bending parent moment M1- is generated in the flange part 220c of 220, and the point part changes to the bending constant moment system as a whole.

At this time, the bending parent moment (M1-) is substantially reduced than the bending parent moment (M-) of FIG. When adjusting the inclination angle of the inclined member, the absolute value may be smaller than the bending positive moment (M1 +), so that the bending constant moment rather than the bending parent moment may be a limiting design factor in the whole point portion.

As a result, even in the case of using a steel mold having the same cross-sectional force, cross-linking can be provided at longer intervals than in the related art.

Furthermore, the upper portion of the upper portion 230 where the bending constant moment (M +) occurs is also installed as a steel beam which is raised upward as shown in FIGS. 3B and 3C.

Since the greater the length of the upper portion of the branch portion 230, the greater the bending positive moment (M +) also increases, so that the lower deflection may occur, so that the upper portion of the upper portion in advance so as to counteract this deflection, the rise is the upper portion of the branch portion Considering the self-weight of the steel 230 and the later-described perforated plate to be introduced in a way to give a camber (CAMBER) to the upper portion of the point.

Although it will be described later, the upper portion of the upper portion 230, which has been raised upward, is tensioned in the vertical direction by the branch portion tension member 300 as shown in FIG. 3C, and in the state where the perforated plate 400a is installed as shown in FIG. 3D, By dismantling the branch tension member 300, the tensile prestress is introduced into the upper portion of the branch portion 230 and the perforated plate in the horizontal direction.

Next, the central rigid steel part 600 is installed on the support base 500 installed at the side end of the flange portion 220c of the branch upper portion.

4A, 4B, 4C, 4D, and 4E illustrate embodiments of the branch pedestal 200,

4A and 4B are the upper and lower point supporting members of the trapezoidal cross section as a whole, and in particular, it can be confirmed that the inclination angle of the inclined member 220 can be adjusted. In addition, when adjusting the length (L3, L4) of the flange portion (220c) of the upper inclined member (220b) it can be seen that it can be prevented from changing the length of the upper portion of the point portion.

4C shows that the flange portion of the inclined member 220 is somewhat modified, and the connecting portion between the flange portion 220c and the inclined member 220b may be formed in the form of a vertical member. This is an example that can be installed if a limitation occurs.

4D illustrates a case in which the support beam 240 is further installed in the transverse direction on the lower surface of the connecting portion of the flange portion and the upper portion of the upper portion 230. The lateral support beam may be referred to as a reinforcement that is additionally installed for warping and positioning in the lateral direction when the width of the branch pedestal increases.

4E is also a state in which the flange portion 220c of the branch supporting member 200 is deformed, and the flange portion 220c is installed so that both ends of the flange portion are not protruded, and thus the center span steel mold 400 is supported. Can be.

FIG. 4F illustrates a case in which the inclined member 220 is arcuately installed, and when the inclined member is manufactured in the arcuate shape, the branch portion of the bed is formed by the arching effect (the effect of effectively distributing the load transmitted to the inclined member). It is also possible to replace the lower member with the upper surface of the temporary piers.

Next, after using the branch portion tension member 300 installed in the branch portion pedestal 200 as shown in FIGS. 2C and 2D, the tension portion is introduced upward and downward, and then, in the state in which the perforated plate 400a is installed, The point tension member 300 is dismantled so that the tension prestress is introduced into the point upper rigid form and the perforated plate in the horizontal direction.

The point tension member 300 refers to a PC steel or tendon, including PC steel wire, PC steel rod and PC steel wire, which is usually used up and down between the point upper steel and the lower member using a PC steel wire. There are technical features.

That is, the reason for the installation is to be bent down by using the point portion of the upper portion of the upper steel 230 (point tension member) (to have the same function as the introduction of some kind of pre-fraction tension to be introduced in the vertical direction. ), While the upper portion of the upper portion 230 of the upper portion 230 is integrated with the upper portion of the upper portion 230, the upper portion of the upper portion 230 integrated with the double-hole plate 400a by disassembling (release of the preflection) the tension member 300 In the process of returning to the original state by the elastic restoring force, by introducing the horizontal tensile prestress into the integrated upper portion of the pointed portion and the perforated plate, it is economical by resisting the bending constant moment (M1 +) as a more effective composite section at the pointed portion. It is possible to manufacture and install the upper portion of the branch 230.

The point tension member 300 is temporarily tensioned and fixed to an unillustrated anchorage in which the other end is fixed to the lower surface of the upper portion of the upper portion 230, the lower end is installed on the upper surface of the lower member (210). Afterwards, the perforated plate 400a is installed on the upper portion of the upper portion of the branch portion 230, and the branch portion tension member 300 is dismantled together with the fixing unit so as to be reused later.

In other words, it is possible to install a more economical point pedestal 200 to be a temporary installation rather than a permanent installation.

Next, as shown in FIG. 2e, the intermediate section is installed to be continuous with the upper section of the point where the tensile prestress is introduced. In the present invention, in particular, the point located between the upper section of the section 230 and the middle section 600 of the section. On the lower surface of the inclined member flange portion 220c of the auxiliary pedestal 200, a support 500 for supporting an end of a kind of medium steel span 600 is provided.

In the past, the temporary bridge bar was installed between the branches in the state of using the temporary bridge bar to install the center span steel between the branch sections or by lifting the center span steel frame with a lifting device such as a crane. In the case of difficult to install the steel was not easy to install, even when using a crane, the crane must continue to lift the center span steel until the connection work is completed, so there was a problem that the workability may fall, but in the present invention By using the support 500 to install the crane located in the point portion as shown in Figure 2e so that the end of the center span steel 600 is supported on the support 500, the construction work can be completed for the center span steel type This can be improved.

The supporting support 500 is installed in the form of a support for a triangular cross-sectional shape, for example, the upper surface is formed in a horizontal plane as shown in Figure 5, the branch portion 200 is precisely the upper surface on the lower surface of the flange portion of the inclined member 220c While the half is installed by a connector such as welding or bolts, the other half is extended to protrude laterally so that the end of the center span steel 600 is mounted on the protruded extended top surface.

Next, as shown in FIG. 2F, a perforated plate 400b is installed on the upper surface of the center span steel mold 600 so that the perforated plate can be continuously installed with the upper portion of the branch portion so that the crosslinking installation can be completed.

FIG. 6 is a perspective view of a temporary facility system of the present invention, wherein the point support 200 is installed on the lower structure 10, and the center span portion supported by the point support 200 and the support 500 is shown. It can be seen that the porous plate 400 is installed on the upper surface of the rigid 600.

The temporary system of the present invention can be used as another temporary facility when the formwork is installed as an upper structure instead of a perforated plate, which can be used as a temporary facility system for placing concrete for slab concrete in bridges.

According to the present invention, the conventional point portion is changed into a bending constant moment portion, and thus, it is possible to install a cross-linkage, which is a temporary facility between the long sections, based on the steel having the same cross-sectional force. It is very excellent and can be installed quickly, so construction is good and rapid construction is possible.

In addition, it is possible to distribute the bending moment efficiently by the support of the branch part, so that there is little deflection in the branch part and the center span, so it is easy to use structurally, and the quality control is easy through the factory production. This is so excellent that it is possible to secure enough construction quality.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims (7)

A lower member installed over an upper surface of the lower structure including a temporary pier; An inclined member installed to extend upwardly from both side ends of the lower member; And a branch portion upper steel formed by being raised between the tops of the inclined members. A branch tension member having one end connected to a lower surface of the upper part of the branch part so that tension is introduced in the vertical direction to the raised upper part of the raised part, and extending downward, the other end part being installed in the lower member to be fixed after tension; And A center span steel type connected between the branch part pedestals; Temporary system comprising a. The method of claim 1, wherein the raised point upper portion of the raised The upper structure including the cross-linked perforated plate is further installed on the upper surface in the state which sags downward by the fixing of the tension portion of the branch portion, and the upper portion of the upper portion of the branch portion is integrated with the upper portion of the branch portion by dismantling the branch portion tension member. A tentative system in which horizontal tensile prestress is introduced into an upper structure integrated with the rigid. The method according to claim 2, wherein the pedestal pedestal is a cross-sectional assembly steel structure made of H-shaped or I-shaped steel beam, segmented in the middle portion of the inclined member is made of the upper and lower point pedestal to A temporary facility system, characterized in that the assembly is installed by the connector including a bolt. According to any one of claims 1 to 3, both side end lower surfaces of the pedestal base support is further provided with a support base on which the center span steel is mounted, both ends of the center span steel is placed on the support base. The central spanning steel beam is connected to the point portion support by a connector including a bolt in a supported state, and the upper structure including the perforated plate is further installed on the central spanning steel top surface. Installing a substructure including a temporary pier; A lower member installed over the upper surface of the lower structure as an assembly steel structure having a trapezoidal cross section; An inclined member installed to extend upwardly from both side ends of the lower member; And installing a branch portion pedestal comprising: a branch portion upper steel formed by being raised between upper portions of the inclined member. One end is connected to the lower part of the upper part of the upper part, and the other end extends downward to tension and fix the tensioning point part connected to the lower member to introduce tension force in the upper and lower directions so that the treated upper part of the upper part sags downward. Making a step; In the state in which the upper structure is integrated with the branch upper steel, by installing an upper structure including a cross-linked perforated plate on the upper surface of the upper portion of the upper portion of the branch portion where the tension force is introduced, dismantle the branch tension material on the upper portion of the upper portion and the upper structure. Introducing a tensile prestress in the horizontal direction; And And connecting the central span steel to the upper part of the branch part of the branch pedestal. The method of claim 5, wherein the pedestal is made of a trapezoidal cross-sectional assembly steel structure made of H-shaped or I-shaped steel beam, It can be installed by first installing the lower branch support from the middle of the inclined member over the upper surface of the lower structure, and then connecting the upper branch support by the connector including a bolt on the upper surface of the lower support. Temporary construction method characterized in that. According to claim 5 or 6, wherein the center span steel After the installation of the supporting base, which is supported by the center span steel on the lower surface of both side end portions of the branch support base where the upward force is introduced, the center span is applied to the branch support by the connector including the bolt. The molten steel is connected, and the upper structure including a perforated plate on the upper surface of the center span steel, the construction method further comprising the installation.

Images