KR101561262B1 - PSC I-type girder for easy maintenance and fall prevention - Google Patents

Abstract

In the present invention, the inner girder of the PSC I-shaped girder is formed by protruding the outer girder on both sides of the inner girder at the left and right sides to have a certain size of the anti-collision and crossing block, thereby constructing the bridge mechanically by the anti- It is possible to perfectly prevent the conduction accident of the bridge and to function perfectly in the lateral direction and the longitudinal direction even when the bridge is completed and to prevent the damage of the upper and lower parts of the bridge at the time of replacing the co- The present invention provides a PSC type I girder which is easy to prevent the occurrence of an overturning and can be maintained.
In order to achieve the above object, the PSC I-type girder according to the present invention is a PSC I-type girder comprising an inner girder and an outer girder. The PSC I- And is formed in the shape of a rectangle having a predetermined width and formed in the same shape or in a convex shape on the left and right sides of the abdomen or in a pentagonal sectional shape so as to prevent the turning of the girder when the girder is installed, A plurality of connection steel bar attachment holes having a predetermined diameter are vertically formed at predetermined positions in a central portion of the anti-collision / An inner girder in which a PC steel wire fixing part is installed in the connecting steel bar mounting hole, and PC steel wire is disposed in the PC steel wire fixing part;
And is formed to have the same height as that of the abdomen at one side of the abdomen of the fulcrum portion and at the same time has a predetermined width and is formed into a quadrangle or an L-shaped or pentagonal cross-sectional shape at one side of the abdomen, And an anti-falling and crossbar block used for raising the girder at the time of replacing the interlock device are integrally protruded integrally with each other, and at the central portion of the anti-fall prevention and crossbar block, An outer girder in which a plurality of connecting steel bar mounting holes having a predetermined diameter are formed, a PC steel wire fixing part is installed in the connecting steel bar mounting hole, and PC steel wire is disposed in the PC steel wire fixing part;
The inner girder and the outer girder are spaced apart from each other, a connecting steel bar is inserted through the connecting steel bar mounting hole of the inner girder and the connecting steel bar mounting hole of the outer girder, And a concrete reinforced concrete section that is formed by curing.

Description

[0002] PSC I-type girders for easy prevention of fall and maintenance are provided.

The present invention relates to a PSC I-type girder which is easy to prevent and maintain the conduction, and in particular, the inner girder at the inner and outer flank portions of the PSC I-type girder has a constant size of both sides on the left and right sides, And a PSC I-type girder which is structurally mechanically prevented from being conducted by the anti-propagation and crossing block so as to prevent conduction of the PSC I-type girder.

In general, the PSC type I girder is designed such that the upper flange is wider than the lower flange for the purpose of increasing the eccentricity efficiency of the PC steel wire, and the center of gravity of the PSC I type girder is biased to the upper side. The price of PSC I type girder is greatly increased. Therefore, the cost of PSC I type girder is increased frequently during construction such as girder construction and transportation.

In order to prevent such a PSC type I girder from being damaged, the PSC type I girder is built and constructed repeatedly. In this way, the PSC I type girder is constructed with a fall prevention facility, which often causes waste of manpower and materials, It is true.

The conventional PSC type I girder causes a lot of human and material damages due to the conduction accidents occurring during each construction process of the PSC type girder, and also causes a social problem in construction management.

In addition, when the PSC I-type girder of a PSC I-type bridge in common use is replaced, the upper part of the alternation and the pier are damaged due to the shortage of the hydraulic jack for the bridge pull- In order to prevent breakage and conduction of PSC Type I girder, a commercial steel bracket, which is a bridge, is used. By using additional steel material brackets, And the economical efficiency is decreased.

In order to reduce the construction cost of the above-mentioned tilting apparatus, a hydraulic jack for raising the bridge is installed on the lower surface of the beam, which simply serves as a load distribution function of the live load, instead of a structure for supporting the load without using a commercial steel bracket, It is also possible to damage the crossbeam or to cause cracks, thereby causing the PSC type I girder to collapse or to reduce the role of cross beams.

Also, as a conventional technique, Japanese Patent No. 10-1034013 (name: a rapid construction method of a half-turn type alternating bridge using an end seam integral type PS seam girder) has been proposed.

As shown in FIGS. 1A to 11, in the rapid construction method of a half-body alternating bridge using the conventional end segregation type bulkhead integral type PS girder, the embankment work is performed at a position where the shift is to be installed, And installing a bridge support on the upper surface of the alternating wall; Fabricating an end bulkhead integral type PS-girder integrally formed at both ends of the longitudinal direction with end partition walls alternately distributing live loads transmitted from the upper structure against the alternate backfill portion earth pressure by a temperature change, respectively; Mounting the girder on the bridge support and connecting the neighboring girder to the girder; Filling the space between the end partitions of the girder with non-shrinkable mortar to integrally connect the end partitions of the adjacent girders; And a step of simultaneously applying a bottom plate and a connecting slab after backfilling the alternate back surface, wherein the end segregation wall integral type PS seam girder comprises: a girder main body having an I-shaped cross-sectional shape; And an end partition wall integrally formed on both ends of the girder main body and having widths larger than the width of the girder main body and having vertical grooves formed on the end surfaces thereof.

A conventional method of rapidly constructing a half-body alternating bridge using a conventional Rosser girder integrated with an end partition wall as described above is characterized in that a separate PSA girder having a partition wall integrally formed at both ends in the longitudinal direction is used, It is possible to prevent the girder from being conducted without installing it, and it is possible to carry out rapid construction and excellent in the running characteristic.

However, the conventional method of rapidly constructing a half-turn bridge using a PS girder integrated with an end part bulkhead as described above is a structure for excluding an alternate expansion joint, Since the connection rigidity is very weak due to the non-shrinkage mortar only in the part, there is a disadvantage in that the function of combining the cross beams at both sides of the girder is insufficient.

The present invention has been conceived in order to solve the above problems, and an inner girder of a PSC I-shaped girder has protruding portions of a lateral side girder on both left and right sides, It is possible to completely prevent the conduction accident of PSC type I girder when the bridge is constructed mechanically by the prevention and crossbar block, and it functions perfectly in the lateral and longitudinal directions even when the bridge is completed, It is an object of the present invention to provide a PSC I-type girder which is easy to prevent from falling and which can be easily maintained while raising the bridge safely without damaging the upper and lower parts of the bridge at the time of replacement.

In order to achieve the above object, the PSC I-type girder according to the present invention is a PSC I-type girder comprising an inner girder and an outer girder. The PSC I- And is formed in the shape of a rectangle having a predetermined width and formed in the same shape or in a convex shape on the left and right sides of the abdomen or in a pentagonal sectional shape so as to prevent the turning of the girder when the girder is installed, A plurality of connection steel bar attachment holes having a predetermined diameter are vertically formed at predetermined positions in a central portion of the anti-collision / An inner girder in which a PC steel wire fixing part is installed in the connecting steel bar mounting hole, and PC steel wire is disposed in the PC steel wire fixing part;
And is formed to have the same height as that of the abdomen at one side of the abdomen of the fulcrum portion and at the same time has a predetermined width and is formed into a quadrangle or an L-shaped or pentagonal cross-sectional shape at one side of the abdomen, And an anti-falling and crossbar block used for raising the girder at the time of replacing the interlock device are integrally protruded integrally with each other, and at the central portion of the anti-fall prevention and crossbar block, An outer girder in which a plurality of connecting steel bar mounting holes having a predetermined diameter are formed, a PC steel wire fixing part is installed in the connecting steel bar mounting hole, and PC steel wire is disposed in the PC steel wire fixing part;
The inner girder and the outer girder are spaced apart from each other, a connecting steel bar is inserted through the connecting steel bar mounting hole of the inner girder and the connecting steel bar mounting hole of the outer girder, And a concrete reinforced concrete section that is formed by curing.

INDUSTRIAL APPLICABILITY As described above, the PSC I-type girder according to the present invention has the following effects.

First, the present invention has an advantage of not only completely preventing conduction accident by means of the anti-collision and crossbar block, but also securing the construction safety completely.

Second, since the present invention can prevent a PSC I-type girder from occurring, it is possible to greatly improve the economical efficiency by reducing the length of the PSC I-type girder and solidifying it.

Third, the present invention has an advantage of securing the safety of the PSC I-type girder, improving the workability, and improving the economical efficiency, when the PSC type I girder is replaced with the interlock device during the common use.

Fourth, the present invention has an advantage that the shape of the PSC I-type girder can be applied to all the girders irrespective of orthogonal or sagittal.

FIG. 1A is a perspective view showing a conventional PS girder in which end partition walls are integrally formed,
Fig. 1B is a front view showing a conventional PS girder in which a conventional end partition wall is integrally formed; Fig.
FIG. 2 is a perspective view showing various forms of end partition walls of a conventional PSS girder in which end partition walls are integrally formed. FIG.
3 to 6 are process drawings showing rapid construction of a half-turn bridge using a conventional PS girder,
7 to 10 are process drawings showing rapid construction of a three-span, half-turn-type alternating bridge using a conventional end segregation bulkhead type PS seam girder,
11 is a view showing a main part of a conventional half bridge type alternating bridge using an end portion bulkhead integral type PS girder,
FIG. 12 is a perspective view of an inner girder of a PSC type I girder,
FIG. 13 is a side view 1 of an inner girder of a PSC I-type girder which is easy to prevent the fall and maintain of the girder according to the present invention,
Fig. 14 is an orthogonal plan view 1 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention, Fig.
Fig. 15 is a sphygmatic top view 1 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain maintenance in accordance with the present invention; Fig.
FIG. 16 is a perspective view of an outer girder of a PSC I-type girder,
Fig. 17 is a side view 1 of an outer girder of a PSC I-type girder which is easy to prevent and maintain maintenance in accordance with the present invention; Fig.
18 is an orthogonal plan view 1 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention,
Fig. 19 is a sphygmatic top view 1 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention, Fig.
FIG. 20 is a plan view of a short-span orthogonal plane 1 showing a lateral arrangement of girders of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention;
Fig. 21 is a cross-sectional sagittal plan view 1 showing a lateral arrangement of girders of a PSC I-type girder which is easy to prevent the fall and maintains maintenance according to the present invention,
FIG. 22 is a plan view of a continuous span of orthogonal spans of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention,
23 is a sectional view taken along the line A-A 'in Fig. 22,
24 is a sectional view taken along the line B-B 'in Fig. 22,
Fig. 25 is a plan view of the continuous span girder bridge 1 showing lateral girder-to-girder connection and combined longitudinal connection of the PSC I-type girder which is easy to prevent the falling and maintenance of the present invention,
26 is a sectional view taken on line A-A 'in Fig. 25,
27 is a sectional view taken along the line B-B 'in Fig. 25,
FIG. 28 is a cross-sectional view 1 showing an alternation in installation of a PSC I-type girder which is easy to prevent and maintain maintenance in accordance with the present invention,
FIG. 29 is a cross-sectional view showing a pier in the case of installing a PSC I-type girder,
Fig. 30 is a cross-sectional view showing the alternation of the coordinate system of the PSC type I girder,
FIG. 31 is a cross-sectional view showing a pier when a schedule device of a PSC I-type girder is easily detached and maintained in accordance with the present invention,
FIG. 32 is a side view 1 of an outer steel reinforcing state using a reinforced concrete block protruding from a joint of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention;
Fig. 33 is a perspective view of an inner girder of a PSC I-type girder,
Fig. 34 is a side view 2 of an inner girder of a PSC I-type girder which is easy to prevent and maintain maintenance in accordance with the present invention; Fig.
35 is an orthogonal plan view 2 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain maintenance in accordance with the present invention,
Fig. 36 is a sphygmatic top view 2 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention, Fig.
FIG. 37 is a perspective view of an outer girder of a PSC I-type girder,
Fig. 38 is a side view 2 of an outer girder of a PSC I-type girder which is easy to prevent and maintain maintenance in accordance with the present invention; Fig.
Fig. 39 is an orthogonal plan view 2 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention; Fig.
Fig. 40 is a sphygmatic top view 2 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain maintenance in accordance with the present invention, Fig.
Fig. 41 is a sectional view 1 showing an inner focal portion of a PSC I-type girder which is easy to prevent the fall and maintain maintenance according to the present invention, Fig.
42 is a sectional view taken on line A-A 'in Fig. 41,
FIG. 43 is a sectional view taken along the line B-B 'in FIG. 41,
44 is a sectional view taken along the line C-C 'in Fig. 41,
Fig. 45 is a sectional view 1 showing an outer focal portion of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention; Fig.
FIG. 46 is a sectional view taken on line A-A 'of FIG. 45,
FIG. 47 is a sectional view taken along the line B-B 'in FIG. 45;
FIG. 48 is a sectional view taken along line C-C 'in FIG. 45,
49 is a short-span orthogonal plan view 2 showing a lateral arrangement of girders of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention,
Fig. 50 is a plan view of a short-span sandwich structure 2 showing a lateral arrangement of girders of a PSC I-girder which is easy to prevent and maintain the fall prevention according to the present invention; Fig.
Fig. 51 is a cross-sectional view 2 showing the alternation of the installation of the girders of the PSC I-type girders,
FIG. 52 is a cross-sectional view showing a bridge pier in the installation of a PSC I-type girder which is easy to prevent the fall and maintains maintenance according to the present invention,
Fig. 53 is a cross-sectional view 2 showing an alternation in the replacement of a coordinate system of a PSC I-type girder,
Fig. 54 is a cross-sectional view 2 showing a pier when changing the co-ordinate device of the PSC type I girder,
FIG. 55 is a side view 2 of an outer steel wire reinforced state using a reinforced concrete block protruding from a joint of a PSC I-type girder which is easy to prevent and maintain the conduction according to the present invention,
FIG. 56 is a perspective view of an inner girder of a PSC I-type girder,
Fig. 57 is a side view 3 of an inner girder of a PSC I-type girder which is easy to prevent the occurrence of and to maintain maintenance according to the present invention; Fig.
Fig. 58 is an orthogonal plan view 3 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain maintenance in accordance with the present invention,
Fig. 59 is a sphygmatic top view 3 showing an inner girder of a PSC I-type girder easy to prevent and maintain maintenance in accordance with the present invention; Fig.
Fig. 60 is a perspective view of an outer girder of a PSC I-type girder,
61 is a side view 3 of an outer girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention,
62 is an orthogonal plan view 3 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention,
Fig. 63 is a sphygmatic top view 3 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention, Fig.
Fig. 64 is a sectional view 2 showing an inner flank portion of a PSC I-type girder which is easy to prevent and maintain maintenance in accordance with the present invention; Fig.
65 is a cross-sectional view along the line A-A 'in FIG. 64,
FIG. 66 is a sectional view taken along the line B-B 'in FIG. 64,
FIG. 67 is a cross-sectional view taken along the line C-C 'in FIG. 64,
FIG. 68 is a sectional view 2 showing an outer focal portion of a PSC I-type girder which is easy to prevent the fall and maintain maintenance according to the present invention,
69 is a sectional view taken along the line A-A 'in Fig. 68,
70 is a sectional view taken along the line B-B 'in FIG. 68,
71 is a sectional view taken along the line C-C 'in Fig. 68,
FIG. 72 is a plan view of a short-span orthogonal plan view showing a transverse arrangement of girders of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention;
FIG. 73 is a plan view of a short-span sandwich structure showing a lateral arrangement of girders of a PSC I-type girder which is easy to prevent the occurrence of and to maintain maintenance of the present invention,
74 is a transverse sectional view 3 showing an alternation in installation of a girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention,
FIG. 75 is a cross-sectional view 3 showing a pier when installing a PSC I-type girder which is easy to prevent and maintain maintenance in accordance with the present invention,
76 is a transverse sectional view 3 showing the alternation of the coordinate system of the PSC type I girder,
FIG. 77 is a cross-sectional view showing a pier of a bridge of a PSC I-type girder in which the fall prevention and maintenance of the girder according to the present invention is easy,
78 is a side view 3 showing an outer steel wire reinforcing state using a reinforced concrete block protruding from a joint of a PSC I-type girder which is easy to prevent the occurrence of and to prevent maintenance of the present invention,
79 is a perspective view of an outer girder of a PSC I-type girder,
80 is a side view of an outer girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention;
81 is an orthogonal plan view 4 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain maintenance in accordance with the present invention,
Fig. 82 is a sphygmatic top view 4 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention, Fig.
83 is a cross-sectional view showing an inner focal portion of the PSC I-type girder which is easy to prevent the occurrence of and to maintain maintenance according to the present invention;
84 is a cross-sectional view along the line A-A 'in FIG. 83,
85 is a sectional view taken along the line B-B 'in FIG. 83,
86 is a sectional view taken along the line C-C 'in FIG. 83,
87 is a cross-sectional view showing an outer focal portion of the PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention,
88 is a sectional view taken along the line A-A 'in Fig. 87,
89 is a sectional view taken along the line B-B 'in Fig. 87,
90 is a sectional view taken along the line C-C 'in Fig. 87,
FIG. 91 is a plan view of a short-span orthogonal plan view showing a lateral arrangement of girders of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention;
FIG. 92 is a plan view of the short-span sandwich structure 4 showing the lateral arrangement of the girders of the PSC I-type girder which is easy to prevent the falling and maintenance of the present invention,
FIG. 93 is a cross-sectional view showing the alternation of installation of the girders of the PSC I-type girders,
FIG. 94 is a cross-sectional view showing a bridge pier in the case of installing a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention;
FIG. 95 is a cross-sectional view showing the alternation of the coordinate system of the PSC I-type girder,
FIG. 96 is a cross-sectional view 3, showing a pier when replacing a co-ordinate apparatus of a PSC I-type girder,
97 is a side view showing an external steel wire reinforced state using a reinforced concrete block protruding from a joint of a PSC I-type girder which is easy to prevent the fall and maintain in accordance with the present invention 4.

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

[Example 1]

FIG. 12 is a perspective view 1 and 13 of an inner side girder of a PSC I-type girder which is easy to prevent and maintain the maintenance according to the present invention, 1 and 14 are orthogonal plan views 1 and 15 of an inner girder of a PSC I-type girder which is easy to prevent the fall and maintain maintenance according to the present invention. Fig. 16 is a perspective view 1 and 17 of an outer side girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention. Fig. 1 and Fig. 18 are orthogonal plan views 1 and 2 of an inner girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention. Fig. ≪ RTI ID = 0.0 > 19 < / RTI > 1 is a cross-sectional plan view showing an inner girder of a PSC I-type girder which is easy to handle, and Fig. 20 is a plan view showing a cross-sectionally orthogonal plan view 1 and Fig. 21 are plan views 1, 22 of a PSC I-type girder in which the girders are arranged in a transverse direction, which is easy to prevent the falling and maintenance of the present invention, 22 is a sectional view taken along the line A-A 'in Fig. 22, Fig. 24 is a cross-sectional view taken along the line B-B' in Fig. 22, Fig. 25 is a plan view of a continuous span girder bridge 1 showing a transverse arrangement and a longitudinal connection composite state between girders of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention. Fig. 26 is a cross- 27 is a cross-sectional view taken along the line B-B 'in Fig. 25, Fig. 28 is a cross- And Fig. 29 is a cross-sectional view showing a pier when the PSC I-type girder is installed to facilitate the prevention of the falling and maintenance of the girder according to the present invention. 1 and Fig. 30 are transverse sectional views 1 and 31 showing an alternation in the case of replacing a coordinate system of a PSC I-type girder which is easy to prevent the falling and maintenance of the present invention and PSC I The cross-sectional view showing the bridge pier when the concrete girder of the type girder is replaced is 1.

As shown in these figures, the PSC I-type girder G, which is easy to prevent and maintain the fall prevention according to the present invention, includes an inner girder IG and a PSC I-girder G composed of an outer girder OG, It may be formed to have the same height as that of the abdomen W on both left and right sides of the fulcrum portion W and to have a predetermined width and be formed in a square shape or to be formed in a convex shape on the right and left sides of the abdomen W, (RCB), which is provided in a pentagonal cross-sectional shape and has the same function as the girder installation prevention function and the post-installation function, and which is used for lifting the girder at the time of replacing the coordinate system, A plurality of connecting steel bar mounting holes SBH having a predetermined diameter are vertically formed at predetermined positions in a central portion of the preventing and blocking block RCB and the PC steel wire fixing portions EPCA are fixed to the connecting steel bar mounting holes SBH And the PC steel wire fixing unit (EPCA) is provided with a PC An inner girder IG on which a steel wire PC is disposed; And is formed on the outer side of the inner girder IG so as to have the same height as that of the abdomen W on one side of the fulcrum portion W and to have a predetermined width and to have a rectangular shape, (RCB), which is used for lifting the girder at the time of replacing the coordinate system, is formed integrally with the RCB A plurality of connecting steel bar mounting holes SBH having a predetermined diameter are vertically formed at predetermined positions in a central portion of the break prevention and protection block RCB and a PC steel wire fixing portion EPCA An outer girder OG having a PC steel wire PC disposed on the PC steel wire fixing part EPCA;
The inner girder IG and the outer girder OG are spaced apart from each other by a predetermined distance and the connecting rod SBH of the inner girder IG and the connecting rod SBH of the outer girder OG And a field-inserted reinforced concrete section (CL) formed by pouring and curing the shrink-free mortar (M) on the connecting rod (SB).

That is, in the PSC I-type girder G in which the prevention of deterioration and maintenance according to the present invention is easy, the inner girder IG of the PSC I-shaped girder G is fixed to both the left and right sides and the outer girder OG is constant (RCB) is integrally formed with the PSC I-type girder (G), it is structurally prevented from being structurally dynamically prevented by the above-mentioned conduction preventing and crossing block (RCB).

Here, the anti-falling and crossing block RCB is formed so as to protrude in a direction perpendicular to the right and left sides of the abdomen W of the orthogonal girder SG.

In addition, the anti-falling and crossing block RCB is formed to protrude obliquely on both sides of the abdomen W of the girder girder CG.

The outer girder OG is provided on one lateral side of the abdomen W and the outer girder OG is provided on both sides of the abdomen W of the inner girder IG, SG are provided in the direction perpendicular to the abdomen W and the diagonal girders CG are provided inclined to the abdomen W.

The inner girder IG may be formed in a rectangular shape having a height equal to the height of the inner girder IG or may have a cross sectional shape that is different from the height of the inner girder IG A pentagon having the same height or a quadrangle having a height below the center of gravity of both ends of the inner girder IG or a pentagon having a height below the centers of gravity of both ends of the inner girder IG.

In other words, the size and shape of the anti-falling and crossing block (RCB) may be a rectangular shape having the same scale as the PSC I-type girder (G) in consideration of the shape and cross-sectional characteristics of the PSC I- Shaped PSC I-shaped girder G or a pentagonal shape lower than the PSC I-shaped girder G's protruding height, and the characteristics according to the respective shapes As follows.

First, the RCB with the square shape of the same size as the height of the PSC I-girder (G) is easy to manufacture in the construction site, and after installation on the alternation (A) and bridge (P) The connection between the PSC type I girders (G) is easy, but the lower part is not stable since the center axis of the end part of the PSC I type girder (G) is in the upper part.

Second, since the center of gravity axis is located at the lower part of the PSC I-girder (G) at the both ends of the center of gravity of the PSC I-shaped girder (G) at the time of transportation and installation, , The manufacture of PSC I-type girder G is rather cumbersome.

Third, when the PSC I-shaped girder (G) is formed by a RCB with a pentagonal bottom portion in the lower part of the center of gravity at both ends, the center of gravity axis is located at the lower part, The connection between the girders (G) is easy to synthesize, but it is rather cumbersome to manufacture in the production site.

Since the three methods from the first to the third have their advantages and disadvantages, the shape of the PSC type I girder (G) and the construction conditions are considered to determine the shape of the RCB And the PSC I-type girder (G) with increased maintenance efficiency can be implemented most economically.

Since the PSC I-type girder (G) is made long in length, high in shape, or secured in the respective construction processes in which the center of gravity is largely warped to improve the efficiency of the PSC I-type girder (G) Can also contribute to the development of additional types of girders (G).

In each of the outer fulcrums where the slab S of the PSC type I girder G is discontinuous, each of the two anti-propagation and crossing blocks RCB protruded to the left and right of the fulcrum portion W is a PSC I- Are connected to each other by the respective anti-collision and cross-section blocks (RCB) protruding to the right and left of the fulcrum portion W of the girder G and the on-site reinforced concrete.

In addition, in each of the inner focal points where the slab S of the PSC I-type girder G is continuous, each of the anti-propagation and crossing blocks RCB protruding from the fulcrum portion W is adjacent to the lateral The RCBs are protruded from left and right sides of the fulcrum portion W of the PSC I-shaped girder G and are connected to each other by the reinforced concrete bars and the connecting bars SB.

The anti-falling and crossing block (RCB) is formed of a steel composite concrete block or a steel block.

The RCB is used as a commercial supporting point for a bridge during the exchange of a co-ordinate apparatus, and as a fixing block for a PC steel wire fixing unit (EPCA) when reinforcing an outer steel wire.

The PSC I-shaped girder G is installed in the PSC U-shaped girder.

In the PSC I-type girder G having the above-described construction, the inner girder IG at both ends of the inner and outer focal points of the PSC I-type girder G is supported by the left and right sides And the outer girder OG is integrally formed with the PSC I-shaped girder G in a predetermined size on both sides of the outer girder OG so as to be structurally damped by the RCB The conduction safety is greatly improved even when the PSC I-type girder (G) is manufactured and manufactured in the manufacturing site, and it is transported by a trailer, or alternatively by a crane (A) and a bridge pier Since no separate preventive facilities are required in each construction process, workability, safety and economy are improved.

In addition, even when replacing the teaching apparatus for maintenance during public use, When the hydraulic jack is installed on the lower surface of the break prevention and protection block RCB integrally projected with the PSC I-shaped girder G, a sufficient riding distance is ensured above the alternation A and the bridge p, Since the bridge can be raised safely without damaging the structure, expensive steel brackets need not be used, the construction cost can be greatly reduced, and the installation position of the hydraulic jack can be provided on the left and right sides of the PSC I-type girder (G) And it is also possible to prevent damages to the beams since it is not necessary to use the beams that do not bear the upper load of the bridge.

In addition, the anti-falling and crossing block (RCB) integrally protruding from the PSC I-shaped girder G serves as a cross beam for live load distribution in addition to the prevention of turning after the alternation (A) and bridge pier In order to allow the slab S to be discontinuous, each of the anti-propagation and crossing blocks RCB protruding from the fulcrum portion W is formed at the point of the PSC I- Each of the anti-propagation and blocking blocks (RCB) protruding from the side wall portion (W) and the on-site piercing reinforced concrete are interconnected and synthesized to be responsible for the lateral distribution of the load. In the inner side portion where the slab (S) The RCBs and RCBs protruding from the abdomen W are protruded from the PSC I-girder G adjacent to each other in the transverse direction and the longitudinal direction, And the connecting rod SB Are mutually resulting connection is to act as a cross beam carrying the lateral distribution of load.

In this case also, construction for installation of cross beam is made with PSC I-type girder (G) in the manufacturing site, and only the connecting part of RCB, which prevents the fall prevention and maintenance, Therefore, it is possible to greatly shorten the construction process of the cross beam, and it is possible to reduce the safety and construction cost according to construction in the air.

It is also possible to utilize the RCB as an integral part of the PSC type I girder (G) as a PC steel wire fixing part (EPCA) for external steel wire warp during joint maintenance management. have.

[Example 2]

Fig. 32 is a side view 1 and Fig. 33 showing a state of reinforcing the outer steel wire using the reinforced concrete block protruding from the joint of the PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention. FIGS. 2 and 34 showing an inner girder of a PSC I-type girder which is easy to manage, side views 2 and 35 of an inner girder of a PSC I-type girder, And Fig. 36 is an orthogonal plan view 2 and Fig. 36 showing an inner girder of the PSC I-type girder according to the present invention, which facilitates the prevention of the falling and the maintenance of the PSC I- 2 and 37 are perspective views 2 and 38 of an outer girder of a PSC I-type girder which is easy to prevent the occurrence of the falling and maintenance of the present invention, and FIG. 38 is a perspective view of a PSC I- The side of the outer girder FIGS. 2 and 39 are orthogonal plan views 2 and 40 of an inner girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention. FIG. Fig. 41 is a cross-sectional view showing an inner flank portion of a PSC I-type girder for facilitating the prevention of a fall and maintenance of the girder according to the present invention, and Fig. 42 is a sectional view taken on line A-A ' 41 is a cross-sectional view taken along line B-B 'of FIG. 41, FIG. 44 is a sectional view taken along the line C-C' of FIG. 41, 45 is a cross-sectional view taken along the line A-A 'in FIG. 45, FIG. 47 is a sectional view taken along the line B-B' in FIG. 45, Fig. 50 is a plan view showing a transverse direction arrangement of the PSC I-type girders in the transverse direction between the girders, Fig. 51 is a cross-sectional view of the PSC I-girder girder which is easy to maintain and maintain. Fig. 2 is a cross-sectional view showing a pier, and FIG. 52 is a cross-sectional view showing a pier when installing a PSC I-type girder for easy prevention and maintenance according to the present invention. Sectional view showing the alternation of the coordinate system of the easy PSC I-type girder, and Fig. 54 is a transverse sectional view 2 and Fig. 54 showing the pier when the coordinate system of the PSC I- 55 is a side view 2 showing an outer steel wire reinforced state using a reinforced concrete block protruding from the joint of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention.

As shown in these figures, the PSC I-type girder G, which is easy to prevent and maintain the fall prevention according to the present invention, includes an inner girder IG and an outer girder OG disposed outside the inner girder IG, (RCB) having a constant width equal to or less than the height of the inner girder (IG) is provided on both sides of the fulcrum portion (W) of the inner girder (IG) And the outer girder OG is formed integrally with one side of the fulcrum portion W so as to protrude from the outer girder OG and have a constant width less than the height of the outer girder OG.

That is, in the PSC I-type girder G, which is easy to prevent and maintain the fall prevention according to the present invention, the inner girder IG at both ends of the inner and outer focal points of the PSC I- OG) is formed by integrally forming a conduction preventing and blocking block (RCB) having a certain size on one side of the left and right sides with the PSC I-type girder (G), it is provided with a conduction preventing and blocking block (RCB) protruding on both sides or one side The structure is mechanically prevented from being conducted.

In addition, the anti-collision and cross-linking block RCB is formed so as to protrude in a direction perpendicular to both sides of the abdomen W of the orthogonal girder SG.

In addition, the anti-falling and crossing block RCB is formed on both sides of the abdomen W of the girder girder CG in an oblique direction.

The RCB may be formed in a rectangular or pentagonal shape having a cross-sectional shape equal to the height of the inner girder IG, or may have a height that is lower than the center of gravity of both ends of the inner girder IG Or a pentagon having a height below the center of gravity at both ends of the inner girder IG.

In addition, at the outer focal points where the slab S of the PSC type I girder G is discontinuous, each of the anti-reflection and crossing blocks RCB protruded to the right and left of the fulcrum portion W is adjacent to the PSC I (RCB) projected to the left and right of the fulcrum portion (W) of the girder (G) and the on-site reinforced concrete.

In each of the inner focal points where the slab S of the PSC type I girder G is continuous, the respective anti-propagation and crossing blocks RCB protruding from the fulcrum portion W are arranged in the transverse direction and the longitudinally adjacent PSC Are connected to each other by means of respective anti-collision and crossing blocks (RCB) protruding from left and right sides of the fulcrum portion (W) of the I-shaped girder (G)

Also, the anti-falling and crossing block (RCB) is formed of a reinforced concrete block, a steel composite concrete block, or a steel block.

The RCB is used as a commercial supporting point for a bridge when replacing a co-ordinate apparatus in the common use, and as a fixing block for an external steel wire fixing part (EPCA) for reinforcement of an external steel wire.

It is also noted that the above-mentioned conduction preventing and crossing block (RCB) is also applicable to PSC type girders.

In the PSC I-type girder G having the above-described construction, the inner girder IG at both ends of the inner and outer focal points of the PSC I-type girder G is supported by the left and right sides The outer girder OG is formed by integrally forming a side wall of the outer side girder G and a side wall of the PSC type I girder G. When the side girder GG is formed integrally with the PSC I girder G, (A) and the bridge pier (P) by means of a trailer after the manufacture and manufacture of the PSC I-type girder (G) at the manufacturing site because the structure is mechanically prevented by RCB. The safety of the conduction is greatly increased, and the construction, safety, and economical efficiency are improved because no separate preventive facilities are required in each construction process.

In addition, since the PSC I-type girder (G) is made long in length, the mold height is high, or the PSC type I girder (G) It can contribute to further development of the girder (G).

The inner girder IG is installed on both right and left sides of the fulcrum of the PSC type I girder G and the outer girder OG Are provided on one side of the fulcrum portion, the orthogonal girder (SG) is provided in a perpendicular direction, and the girder girder (CG) is inclined in consideration of a tilted angle.

The size and shape of the anti-falling and crossing block (RCB) may be a rectangular shape having the same size as the PSC I-type girder (G) in consideration of the shape and cross-sectional characteristics of the PSC I- Or a pentagonal shape or a quadrangular shape having a scale smaller than the height of the PSC I-shaped girder G or a protruding shape having a pentagonal shape while being lower than a height of the PSC I-shaped girder G, As follows.

First, the RCB with the square shape of the same size as the height of the PSC I-girder (G) is easy to manufacture in the construction site, and after installation on the alternation (A) and bridge (P) The connection between the PSC type I girders (G) is easy, but the lower part is not stable because the center axis of the end part of the PSC type I girder (G) is in the upper part.

Second, since the center of gravity axis is located at the lower portion of the rectangular RCB at the lower part of the center of gravity of both ends of the PSC I-shaped girder (G), the PSC I The manufacture of the girder G is rather cumbersome.

Third, if both ends of the PSC I-shaped girder G are formed in a rectangular shape below the center axis of gravity and an RCB is formed in the upper part in an iron shape, the center of gravity axis is in the lower part, The safety is maintained and the connection between adjacent PSC I-girders (G) is easy, but it is somewhat cumbersome to manufacture in the production site.

Since the three methods from the first to the third have their advantages and disadvantages, the shape of the PSC type I girder (G) and the construction conditions are considered to determine the shape of the RCB And the PSC I-type girder (G) with increased maintenance efficiency can be implemented most economically.

In addition, even when replacing the teaching apparatus for maintenance during public use, When a hydraulic jack is installed on the lower surface of the anti-collision / anti-blocking block (RCB) protruding from the structure integrated with the PSC I-type girder G, a sufficient ridge distance is ensured above the alternation A and bridge p Since the bridge can be raised safely without damaging the structure, the construction cost can be greatly reduced because expensive steel brackets are not required, and the installation position of the hydraulic jack can be installed on both sides of the PSC I-type girder (G) There is an effect that it is possible to prevent the damage of the cross beams because it is not necessary to use the cross beams that do not bear the overhead load of the bridge.

In addition, the anti-collision and protection block (RCB) integrally protruding from the PSC I-type girder G serves as a guardrail for the live load distribution in addition to the prevention of the fall after the shift (A) and the bridge pier In order to allow the slab S to be discontinuous, each of the anti-propagation and crossing blocks RCB protruding from the fulcrum portion W is formed at the point of the PSC I- Each of the anti-propagation and blocking blocks (RCB) projected on the side wall portion (W) and the on-site piercing reinforced concrete are interconnected to form a lateral distribution of the load. On the inner side portion where the slab (S) (RCB) protruding from the wall (W) of the PSC I girder (G) adjacent to each other in the transverse direction and the longitudinal direction, and an on-site reinforced concrete block Connecting joints by connecting steel bars (SB) So as to serve as a crossbar for lateral distribution of the load.

In this case as well, the construction for the installation of the beam is made of the RCB with the prevention of the fall prevention and the beam block (RCB) integrated with the PSC type I girder (G) Since only the connection part of the block (RCB) is constructed, the construction process of the cross beam can be greatly shortened, and the safety and construction cost can be reduced in the air.

In addition, the break prevention and protection block (RCB) integrally formed with the PSC I-type girder (G) can be utilized as an external sheathing steel fixing part (EPCA) for reinforcing outer steel wire during common maintenance management. .

[Example 3]

FIG. 56 is a perspective view 3 and 57 of an inner side girder of a PSC I-type girder which is easy to prevent and maintain the maintenance according to the present invention. FIG. And FIG. 58 is an orthogonal plan view 3 and FIG. 59 showing an inner girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention. FIG. 60 is a perspective view of an outer girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention. FIG. Side view showing the outer girder of the PSC I-type girder which is easy to prevent and maintain, and Fig. 62 is an orthogonal plan view 3 and Fig. 62 showing the inner girder of the PSC I- 63 is a conductive prevention and maintenance according to the present invention 64 is a sectional view 2 showing an inner focal portion of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention, and Fig. 65 is a cross-sectional view of an inner side girder of PSC I- 64 is a sectional view taken along the line B-B 'of FIG. 64, FIG. 67 is a sectional view taken along line C-C' of FIG. 64, and FIG. 68 is a cross- 68 is a sectional view taken along the line A-A 'in FIG. 68, FIG. 70 is a sectional view taken along the line B-B' in FIG. 68, and FIG. 71 is a sectional view taken along the line C- And FIG. 72 is a plan view of a short-span orthogonal cross-section showing transverse arrangement of girders of a PSC I-type girder which is easy to prevent the fall and maintain maintenance according to the present invention. Fig. 74 is a plan view of a PSC I-girder girder showing a lateral arrangement of girders in a transverse direction, And FIG. 75 is a transverse sectional view 3 and FIG. 76 showing a pier when installing a PSC I-type girder which is easy to prevent and maintain the falling of the girder according to the present invention. And Fig. 77 is a cross-sectional view 3 and Fig. 77 showing shifts of the PSC I-type girder according to the present invention when the PSC I-type girder is easily replaced and the PSC I- Sectional view 2 and 78 are side views 3 showing an outer steel wire reinforced state using a jointed reinforced concrete block of a PSC I-type girder which is easily detached and maintained in accordance with the present invention, FIG. 79 is a cross- Perspective views 4 and 80 of an outer girder of a PSC I-type girder which facilitates prevention of deterioration and maintenance according to the present invention show an outer girder of a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention Side views 4 and 81 show An orthogonal plan view 4 and 82 of an inner girder of a PSC I-type girder which facilitates the prevention of deterioration and maintenance according to the present invention is an inner girder of a PSC I- 84 is a sectional view taken along the line A-A 'in FIG. 83, and FIG. 85 is a sectional view taken along the line A-A' in FIG. 83. FIG. 83 is a cross-sectional view taken along the line B-B 'of FIG. 83, FIG. 86 is a sectional view taken along the line C-C' of FIG. 83, 87 is a sectional view taken along the line A-A 'in FIG. 87, FIG. 89 is a sectional view taken along the line B-B' in FIG. 87, FIG. 90 is a sectional view taken along the line C- Fig. 92 is a cross-sectional plan view of the PSC I-type girder which is easy to manage and shows the transversely arranged state between the girders. Fig. Fig. 93 is a cross-sectional sagittal plan view showing a transverse arrangement state of the PSC I-type girder which is easy to prevent the fall of the PSC I-type girder. Fig. 94 is a cross-sectional view 4 and 95 of a bridge pier when installing a PSC I-type girder which is easy to prevent and maintain the fall prevention according to the present invention, and Fig. 95 is a cross- And Fig. 96 is a transverse sectional view 3 and Fig. 97 showing a bridge pier when the PSC type I girder is replaced with the PSC I-type girder which facilitates the prevention of the falling and the maintenance of the girder according to the present invention. Fig. 4 is a side view 4 showing a state of reinforcing the outer steel wire using a reinforced concrete block protruding from the joint of the PSC I-type girder which is easy to prevent and maintain the conduction according to the present invention.

As shown in these figures, the PSC I-type girder G, which is easy to prevent and maintain the fall prevention according to the present invention, includes an inner girder IG and an outer girder OG disposed outside the inner girder IG, (RCB) having a constant width equal to or less than the height of the inner girder (IG) is provided on both sides of the fulcrum portion (W) of the inner girder (IG) And the outer girder OG is formed integrally with one side of the fulcrum portion W so as to protrude from the outer girder OG and have a constant width less than the height of the outer girder OG.

That is, in the PSC I-type girder G, which is easy to prevent and maintain the conduction according to the present invention, the inner girder IG at both ends of the inner and outer focal points of the PSC I- (RCB) having a certain size on one side of the left and right sides is integrally formed with the PSC I-shaped girder G, the RCB is formed by the anti-collision and crossing block RCB protruding from one side or both sides of the fulcrum Structurally, it is a structure in which conduction is prevented mechanically.

In addition, the anti-falling and crossing block RCB is protruded in a direction perpendicular to the right and left sides of the fulcrum portion W of the orthogonal girder SG.

The anti-falling and crossing block RCB is formed to protrude obliquely on both right and left sides of the fulcrum portion W of the girder girder CG.

The RCB may be formed in a rectangular or pentagonal shape having a cross-sectional shape equal to the height of the inner girder IG, or may have a height that is lower than the center of gravity of both ends of the inner girder IG Or a pentagon having a height below the center of gravity at both ends of the inner girder IG.

In addition, at the outer focal points where the slab S of the PSC type I girder G is discontinuous, each of the anti-reflection and crossing blocks RCB protruded to the right and left of the fulcrum portion W is adjacent to the PSC I (RCB) projected to the left and right of the fulcrum portion (W) of the girder (G) and the on-site reinforced concrete.

In each of the inner focal points where the slab S of the PSC type I girder G is continuous, the respective anti-propagation and crossing blocks RCB protruding from the fulcrum portion W are arranged in the transverse direction and the longitudinally adjacent PSC Are connected to each other by means of respective anti-collision and crossing blocks (RCB) protruding from left and right sides of the fulcrum portion (W) of the I-shaped girder (G)

In addition, the anti-falling and crossing block (RCB) is formed of a steel composite concrete block or a steel block.

The RCB is used as a commercial supporting point for a bridge when replacing a co-ordinate apparatus in the common use, and as a fixing block for an external steel wire fixing part (EPCA) for reinforcement of an external steel wire.

The PSC I-shaped girder G is installed in the PSC U-shaped girder.

The PSC I-type girder G having the above-described configuration and easy to prevent the falling and maintenance of the present invention has the inner girder at both ends of the inner and outer focal points of the PSC I-shaped girder G, (RCB) having a predetermined size is formed integrally with the PSC I-shaped girder (G) on both sides of the left and right sides, it is structured by the RCB which is protruded on both sides, Therefore, even when the PSC I-type girder (G) is manufactured and manufactured, it can be transported by a trailer, or alternatively by a crane (A) and a bridge pier (P) And it is possible to improve the workability, safety, and economical efficiency since there is no need of separate conduction preventing equipment in each construction process.

Since the PSC I-type girder G is securely secured during each construction process in which the center of gravity is widened to improve the efficiency of the PSC I-type girder G or to increase the height of the PSC type I girder G, (G). ≪ / RTI >

On the other hand, in the installation of the RCB in the PSC I-type girder G, which is easy to prevent the fall and maintain the present invention, the inner girder is installed on both right and left sides of the fulcrum portion, And the orthogonal girder SG is installed in a perpendicular direction and the girder girder CG is inclined in consideration of an inclined angle.

The size and shape of the anti-falling and crossing block (RCB) may be a rectangular shape having the same size as the PSC I-type girder (G) in consideration of the shape and cross-sectional characteristics of the PSC I- Or a pentagonal shape or a square shape having a scale lower than that of the PSC I-shaped girder (G), or a pentagonal shape with a lower shape height than that of the PSC I-shaped girder (G) Respectively.

First, the RCB with the square shape of the same size as the height of the PSC I-girder (G) is easy to manufacture in the construction site, and after installation on the alternation (A) and bridge (P) The connection between the PSC type I girders (G) is easy, but the lower part is not stable because the center axis of the end part of the PSC type I girder (G) is in the upper part.

Second, since the center of gravity axis is located at the lower part of the PSC I-girder (G) at the both ends of the center of gravity, PSC I type girder (G) is somewhat cumbersome to manufacture.

Third, when the PSC I-shaped girder (G) is formed in a pentagon shape as a whole by means of a pentagonal-shaped anti-reflection and protection block (RCB) on the lower part of the central axis of gravity, the gravity center axis is in the lower part, The connection between PSC type I girders (G) is easy to synthesize, but it is rather cumbersome to manufacture in the production site.

Since the three methods from the first to the third have their advantages and disadvantages, the shape of the PSC type I girder (G) and the construction conditions are considered to determine the shape of the RCB And the PSC I-type girder (G) with increased maintenance efficiency can be implemented most economically.

Since the PSC I-type girder (G) is made long in length, high in shape, or secured in the respective construction processes in which the center of gravity is largely warped to improve the efficiency of the PSC I-type girder (G) Can also contribute to the development of additional types of girders (G).

In each of the outer fulcrums where the slab S of the PSC type I girder G is discontinuous, the respective anti-collision and crossing blocks RCB protruded to the left and right of the fulcrum portion W are arranged in the transverse direction with adjacent PSC I (RCB) protruding to the left and right of the fulcrum portion (W) of the girder (G) and the on-site reinforced concrete.

In each of the inner focal points where the slab S of the PSC type I girder G is continuous, each of the anti-propagation and crossing blocks RCB protruding from the fulcrum portion W is formed by a PSC Are connected to each other by means of respective anti-collision and crossing blocks (RCB) protruding from left and right sides of the fulcrum portion (W) of the I-shaped girder (G)

The RCB may be formed of any one of a reinforced concrete block, a steel composite concrete block, and a steel block.

In addition, the anti-collision and crossbar block (RCB) is used as a commercial support point, which is a bridge at the time of replacing the interlock device during the common use.

The RCB is used as a fixing block of the PC steel wire fixing part (EPCA) when reinforcing the outer steel wire.

On the other hand, it is found that the above-mentioned conduction preventing and crossing block (RCB) can be applied to PSC type girders.

In the PSC I-type girder having the above-described construction, the inner girder IG at both ends of the inner and outer focal points of the PSC I-shaped girder G is disposed on the right and left sides, When the girder OG is integrally formed with the PSC I-type girder G in a predetermined size on both sides of the girder OG, a conduction preventing and blocking block RCB prevents conduction dynamics The construction safety is greatly improved even when the PSC I-type girder (G) is manufactured and manufactured at the manufacturing site, after being transported by the trailer, by the crane (A) and by the bridge (P) It is unnecessary to provide a separate conduction preventive device, which increases workability, safety, and economy.

In addition, even when replacing a calibration device for maintenance during public use, when a hydraulic jack is mounted on the lower surface of the anti-reverse & RCB, a sufficient ridge distance is ensured above the alternation A and pier P, The construction cost can be greatly reduced because there is no need to use an expensive steel bracket and the installation position of the hydraulic jack can be installed on the left and right sides of the PSC I-type girder (G) There is an effect that it is possible to prevent the damage of the cross beams because it is not necessary to use the cross beams that do not bear the overhead load of the bridge.

In addition, the anti-collision and cross-section block RCB protruding from the structure integrated with the PSC I-shaped girder G functions as a crossbar for live load distribution in addition to the prevention of turning after the alternation (A) and bridge pier In order to make the slab S non-continuous, on the other hand, each of the anti-propagation and crossing blocks RCB protruding from the fulcrum portion W is disposed in the transversely adjacent PSC I-girder G, (RCB) protruding from the fulcrum portion (W) of the fulcrum portion (W) of the fulcrum portion (W) and the field-inserted reinforced concrete, (RCB) protruding from the longitudinally extending PSC I-girder (G) adjacent to each other in the transverse direction and the longitudinal direction are connected to the on-site reinforced concrete By the steel bar SB, And it is assumed that it acts as a crossbar which is responsible for lateral distribution of load.

In this case also, construction for installation of cross beam is made with PSC I-type girder (G) in the manufacturing site, and only the connecting part of RCB, which prevents the fall prevention and maintenance, Therefore, it is possible to greatly shorten the construction process of the cross beam, and it is possible to reduce the safety and construction cost according to construction in the air.

In addition, the anti-collision and cross-section block (RCB) integrated with the PSC I-type girder (G) can be used as an external sheathing steel fixing part (EPCA) for external steel reinforcement during joint maintenance management .

A: alternating CG: girder girder
CL: Field mounted reinforced concrete composite section EPCA: PC steel wire fixing part for external steel girder steel
G: PSC I girder IG: PSC inner girder of I girder
M: Non-shrinkage mortar OG: Outside girder of PSC type I girder
P: Pier PC: PC wire
PCA: PC steel wire fixing part RCB: Anti-reverse and crossbar block
SB: Connection steel bar SBH: Connection steel bar installation hole
SG: Orthogonal girder W: Abdomen

Claims (4)

In the PSC I-type girder (G) composed of the inner girder (IG) and the outer girder (OG)
And may be formed to have the same height as the width of the abdomen W on both left and right sides of the fulcrum portion W and to have a predetermined width and to have a rectangular shape or to have a convex shape on the left and right sides of the abdomen W, (RCB), which is used for lifting the girder at the time of replacing the coordinate system, is integrally protruded integrally with each other, A plurality of connecting steel bar mounting holes SBH having a predetermined diameter up and down are formed at predetermined positions in a central portion of the block RCB and PC steel wire fixing portions EPCA are respectively installed in the connecting steel bar mounting holes SBH, An inner girder (IG) in which a PC steel wire (PC) is disposed in the PC steel wire fixing part (EPCA);
And is formed on the outer side of the inner girder IG so as to have the same height as that of the abdomen W on one side of the fulcrum portion W and to have a predetermined width and to have a rectangular shape, (RCB), which is used for lifting the girder at the time of replacing the coordinate system, is formed integrally with the RCB A plurality of connecting steel bar mounting holes SBH having a predetermined diameter are vertically formed at predetermined positions in a central portion of the break prevention and protection block RCB and a PC steel wire fixing portion EPCA An outer girder OG having a PC steel wire PC disposed on the PC steel wire fixing part EPCA;
The inner girder IG and the outer girder OG are spaced apart from each other by a predetermined distance and the connecting rod SBH of the inner girder IG and the connecting rod SBH of the outer girder OG A reinforced concrete concrete section (CL) which is formed by penetrating a connecting steel bar (SB) and forming a non-shrinkable mortar (M) by placing and curing the connecting steel bar (SB) PSC Type I girder for easy installation. The method according to claim 1,
The inner girder IG of the bridge girder SG is provided at the right and left sides of the transverse girder SG,
And is formed to protrude in an oblique direction on both right and left sides of the abdomen (W) of the girder girder (CG). delete delete

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