KR100868865B1 - Method of constructuring prestressed concrete composite beam bridge continuation structure having haunch block located at columm part thereof and structure using same - Google Patents

Abstract

The present invention relates to a continuum structure of a prestressed concrete (PSC) beam bridge in which haunch blocks are formed in a pier portion of a continuous bridge and a method thereof, and to a prestressed concrete (PSC) beam bridge in which a plurality of PSC beams are connected in an axial direction. A continuity structure of: a haunch block whose cross section is formed larger than a cross section of an end portion in the axial direction, and a haunch block mounted on a pier where two beams are continuous in the axial direction; A point precast PSC beam mounted on the haunch block and installed in a plurality of orthogonal directions; A connecting member for connecting and fixing the haunch block and the branch precast PSC beam; Connecting concrete cured in situ between the haunch block and the branch precast PSC beam; A precast PSC beam installed in the axial direction such that at least one end thereof is supported by the branch precast PSC beam; A continuous steel rod which is tensioned in a state in which the branch precast PSC beam and the upper side of the precast PSC beam are connected to continually concatenate the branch precast PSC beam and the precast PSC beam; A tension member for introducing prestress into the branch precast PSC beam and the precast PSC beam; It is composed of a concrete base plate formed by including the concrete portion on the upper portion of the precast PSC beam and the precast PSC beam, a large side in the continuous portion of the pier portion where a large part moment is concentrated in the continuous bridge Prestressed concrete (PSC) beam bridges can be installed easily by offsetting the pre-momentary precast PSC beams on the haunch blocks that have a cross-section, effectively canceling the larger moments that act as the span of the continuous bridge increases. Provides a sequential structure and its method.

Continuous bridge, continuous structure, haunch block, precast PSC beam, continuous rod, connecting rod

Description

FIELD OF CONSTRUCTURING PRESTRESSED CONCRETE COMPOSITE BEAM BRIDGE CONTINUATION STRUCTURE HAVING HAUNCH BLOCK LOCATED AT COLUMM PART THEREOF AND STRUCTURE USING SAME}

Figure 1a is a side view showing the shape of a conventional prestressed concrete simple beam

1B and 1C are side views showing a structure of continuation of a conventional PSC beam;

2a to 2e is a side view showing the continuity structure according to the construction sequence according to the continuous method of the prestressed concrete beam bridge according to the present invention

3 is a side view of the intermediate precast PSC beam of FIG. 2E;

4 is a cross-sectional view taken along the line IV-IV of FIG. 3.

5 is a cross-sectional view taken along the cutting line VV of FIG. 3.

FIG. 6 is a perspective side view of the steel box-shaped haunch block and branch precast PSC beam of FIG. 2E according to a first embodiment of the present invention. FIG.

7 is a side view showing the appearance of FIG.

FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG. 6.

9 is a cross-sectional view taken along the line VII-VII of FIG. 6.

10 is a cross-sectional view taken along the line VII-VII of FIG. 6.

FIG. 11 is a perspective side view of the lightweight concrete haunch block and branch precast PSC beam of FIG. 2E in accordance with a second embodiment of the present invention; FIG.

12 is a side view showing the appearance of FIG.

FIG. 13 is a cross-sectional view taken along the cutting line of FIG. 11.

14 is a cross-sectional view taken along the cutting line XIV-XIV of FIG. 11.

15 is a cross-sectional view taken along the cutting line XV-XV of FIG. 11.

16 is a side view of the haunch block of FIGS. 6 and 11;

FIG. 17 is a cross-sectional view taken along the cutting line VI-VI of FIG. 16.

18 is a cross-sectional view taken along the line VIII-VIII of FIG. 16.

19 is a perspective view of the end of the branch precast PSC beam;

20 is a perspective view of the end of the intermediate precast PSC beam in contact with the point precast PSC beam of FIG.

21A-21C show a process in which the ends of FIGS. 19 and 20 are combined;

FIG. 21D is a cross-sectional view of a shape in which the joint of FIG. 19 and FIG. 20 is welded. FIG.

FIG. 22 is a side view showing the tension member in FIG. 2E

** Description of symbols for the main parts of the drawing **

10: shift 20: pier

11,21: permanent bearing 22: temporary bearing

23: buried steel bar 23a: connecting nut

77: height adjustment plate 88: left and right adjustment plate

100: continuous structure of precast prestressed concrete beam bridge

110: steel box type haunch block 111: reinforcement rib plate

112: point reinforcement plate 113: shear reinforcement plate

118: fixed fixing plate 119: haunch block fixed steel bar

119a: fixing nut 120: branch precast PSC beam

120a: Lower flange side 121,131,141: Continuous steel bar

121a, 141a: fixing nut 121b, 141b: fixing plate

121c, 141c: Steel rod fixing fixture 121d: Connecting nut

124,144: Retention socket 122, 132, 142: Primary tendon

129: rebar 130: end precast PSC beam

140: intermediate precast PSC beam 150: concrete deck

161, 162: connecting rod 161a, 162a: retaining nut

163, 263: support bearing 163a, 263a: rubber pad

170,270 connection concrete 180 second connection concrete

199: second continuous tendon 210; Lightweight concrete haunt block

210a: haunch block receiving portion 219: haunch block fixed steel rod

220: Branch precast PSC beam 220a, 220b, 220c: Lower flange side

222: 2nd continuous tendon 230a: concrete pouring passage

261: connecting rod 261a; Retaining nut

262a, 262b: Sheath pipe for connecting steel bar 280b: Rubber side plate

The present invention relates to a continuous method of a prestressed concrete composite beam (hereinafter, simply referred to as a "PSC beam") bridge and a continuous structure using the same. Install the haunch block, and precast PSC beam mounted on the top of the haunch block is placed on the connection area of the top of the haunch block and the bottom of the precast PSC beam. By integrating a structure, the present invention relates to a continuous construction method of a concrete PSC beam bridge which improves the workability of a continuous bridge while effectively canceling sub moments concentrated on a bridge portion of a continuous bridge and a continuous structure using the same.

In general, the precast prestressed concrete girder is installed to act as a beam when constructing a structure such as a bridge, and such a precast girder is manufactured as a simple beam and may be constructed as a simple bridge mounted between the piers and the piers. That is, as shown in Figure 1a, the simple beam-shaped PSC beam (1) is configured so that both ends (11, 12) tension the tendon 20 on the PSC beam 10 is simply mounted on the pier do.

In contrast, a continuous bridge refers to a form in which two or more precast prestressed concrete girders are continuous as shown in FIG. 1B, and is known as an improved form that is advantageous in terms of economy and maintenance compared to a simple beam. More specifically, both ends 11 and 12 are mounted on a pier, and the reinforcing bars 40 are mounted on the synthesized bottom plate 30 while simultaneously pre-introducing compressive stress by tensioning with the tendon 20 in the precast beam. It will serve to connect these two beams. However, such a continuous bridge has a problem that a crack is easily generated on the upper side of the continuous portion as a large sub-moment acts on the continuous portion of the bridge portion.

As a result, a continuous bridge 1 "of the type shown in FIG. 1C has been constructed, which is achieved by tensioning the continuous tendon 50 penetrating and connecting the respective PSC beams 10. In addition, although not shown in the drawing, the cross section of the PSC beam 10 may be applied to different areas of the pier continuous portion where the large minor moment acts in the continuous bridge, although not shown in the drawing. On the other hand, the cross section tends to be longer by offsetting the part moment acting by designing a much larger cross section.In this way, the cross-section precast PSC beam having a large cross section at the continuous part of the bridge is difficult to manufacture and handle, The construction of the large precast PSC beam has a certain limitation on transporting and pulling, which has a problem in that the workability is greatly reduced and the cost is increased.

In order to solve the problems described above, the present invention provides a continuous structure of a long span bridge by combining precast PSC beams on a haunch block that has a large cross-sectional coefficient at a continuous portion of a bridge where large minor moments are concentrated. It is an object of the present invention to provide a continuous structure of a prestressed concrete beam bridge in which a haunch block is formed in a pier portion of a continuous bridge that can be more easily implemented, and a method thereof.

In addition, the present invention, in connecting the branch precast PSC beam and the intermediate precast PSC beam to each other and continuous, embeds steel bars in the upper flange of the precast PSC beam adjacent to each other in the axial direction, respectively, and precast PSC beam By sequencing the PSC beams in the axial direction by tensioning steel rods that are buried adjacent to each other after curing concrete in the place between the beams and the beams, construction is simple and local by connecting two different PSC beams. Another object is to eliminate unnecessary stress that may occur.

In addition, the present invention by using the haunch block of the steel box structure (Steel Box Structure) to secure a larger cross-sectional coefficient to effectively offset the large part moment acting on the continuous portion of the bridge part of the continuous bridge for another object do.

In addition, when the haunch block is formed of concrete, the present invention is such that the point precast PSC beam is constrained not only in the axial direction but also in the perpendicular direction of the haunt block in a state where the precast PSC beam is mounted on the top of the haunch block. It aims at improving a workability more by doing this.

Another object of the present invention is to reduce the amount of moment generated in the continuous part of bridge piers of the bridge by reducing the weight of the structure using the same material as the material of the haunch block concrete by using lightweight concrete. It is done.

The present invention is a continuous structure of a prestressed concrete beam bridge in which a plurality of PSC beams are connected in the axial direction in order to achieve the object described above, the two beams in the axial direction is mounted on the pier top (coping) continuous Haunch block; A point portion precast PSC beam mounted on the haunch block and installed in a plurality of orthogonal directions; A connecting member for connecting and fixing the haunch block and the branch precast PSC beam; Connecting concrete cast and cured between the haunch block and the branch precast PSC beam; A precast PSC beam installed in the axial direction such that at least one end thereof is supported by the branch precast PSC beam; A continuous steel rod which is tensioned in a state in which the branch precast PSC beam and the upper side of the precast PSC beam are connected to continually concatenate the branch precast PSC beam and the precast PSC beam; A tension member for introducing prestress into the branch precast PSC beam and the precast PSC beam; It provides a continuous structure of the prestressed concrete beam bridge, characterized in that it comprises a concrete bottom plate formed by including the concrete portion on the upper portion of the precast PSC beam and the precast PSC beam.

For reference, in the specification and claims of the present invention, "pier" does not mean only a pillar supporting the bridge at an intermediate point portion, but a pillar supporting both ends of the bridge (generally used as the term "shift"). Will be defined as including).

This is because the point precast PSC beam is coupled to the haunch block that has a large cross-sectional coefficient at the pier continuous portion where the large moment is concentrated in the continuous bridge. This is to allow easy construction while effectively canceling the minor moment.

More specifically, the PSC beams may be formed in a predetermined cross section when the bridge is short, but as the span is longer in a continuous bridge, the PSC beam at the pier part has a very large minor moment at the continuous part of the bridge. The cross section of is to be formed by the greatly increased edge section. In this case, as the cross-section of the PSC beam is increased, not only the construction of transporting and installing the PSC beam, which has become very heavy, from the manufacturing site to the site is limited, but also many large cranes are used depending on the length and weight of the PSC beam. Further, as the additional cost for the additional formwork for manufacturing the cross-section precast PSC beam is additionally increased, the manufacturing cost is greatly increased, and the manufacturing process is more complicated and the manufacturing time is long.

Accordingly, in order to shorten the construction period and to construct the bridge more economically, if the bridge is long, the upper structure around the pier where a large minor moment acts is placed between the upper part of the pier and the branch precast PSC beam. By constructing the upper structure of the bridge with a haunch block to form the edge, it is possible to easily implement a large edge in the bridge of continuous bridges while improving work time or workability of each type. .

In addition, the present invention, by using the steel box-shaped haunch block can secure a larger cross-sectional coefficient to effectively cancel the large part moment acting on the continuous portion of the bridge portion of the continuous bridge, and also the steel box-shaped haunch block By reducing the weight of itself, there is an advantage of reducing the minor moment relative to the continuous portion of the piers.

In addition, the present invention is to reduce the pier part moment by the weight of the light weight concrete haunch block when the haunch block is formed of lightweight concrete, and also to secure a large cross-sectional coefficient to a large part moment acting on the continuous part of the pier part of the continuous bridge Can be effectively canceled, and the point precast PSC beam is mounted on the haunch block to be constrained not only in the direction of the axial direction but also in the direction of the right angle of the axial direction. have.

In addition, since all the PSC beams are made of precast in advance, it is possible to minimize the construction work of placing concrete in the production site or the site, so that construction can be performed even in a short construction period, and the construction of the beam bridge is continuous. This has the advantage of being very simple.

The connecting member is formed of a connecting steel rod having one end embedded in the branch precast PSC beam and the other end fixedly connected to the haunch block. Accordingly, the haunch block and the point precast PSC beam are able to offset the large minor moment acting on the pier continuous portion as one integrated body.

On the other hand, the haunch block may be formed of a steel box structure (Steel Box Struture) of the hollow form. As the haunch block is formed as a hollow steel box structure, its weight is reduced, so that the moment of the pier is relatively decreased, and the material itself has a large modulus of elasticity, and the section modulus is increased to act on the continuous part of the pier. It is possible to cancel the moment. In addition, as the haunt block is formed in a hollow shape, an operator may enter the haunt block to facilitate the operation of mutually fixing the connecting rod connecting the precast PSC beam and the haunch block.

On the other hand, the haunch block may be formed of concrete. At this time, in order to improve the workability with the ease of handling and to reduce the self-weight, 1.5ton instead of using a typical concrete (weight 2.5ton / m ³ per unit weight) / m ³ to 1.8ton / m ³ It is desirable to use lightweight concrete in haunt blocks. In addition, when the haunch block is formed of concrete, the connecting rod is fixed to connect the point precast PSC beam and the haunch block in a tense state.

A recess is formed above the haunch block along the axial direction to accommodate the lower flange of the precast PSC beam to stably mount the spot precast PSC beam on the haunch block even before connecting concrete is poured. It becomes possible.

A bearing is disposed on the bottom surface of the recess of the haunch block to mount the point precast PSC beam on the bearing. At this time, as the branch precast PSC beam is mounted on the bearing and spaced apart from the bottom surface of the recess of the haunch block, connecting concrete may flow between the branch precast PSC beam and the bottom of the recess of the haunch block. A passage is formed. In addition, the connecting concrete flows into the lower portion of the branch precast PSC beam and is poured through the passage formed through both sides of the lower portion of the branch precast PSC beam or through the branch precast PSC beam.

In the state before the point precast PSC beam is mounted on the top of the haunch block and before the connecting concrete is placed, the side surface of the point precast PSC beam is in contact with the haunch block at the center portion of the haunch block. However, at a position spaced axially away from the central portion of the haunch block, the lower side of the spot precast PSC beam is formed to contact the haunch block. As a result, the branched precast PSC beam is constrained in the direction perpendicular to the axial direction while being mounted on the haunch block. Thus, the branched precast PSC beam is suppressed from disturbances such as external impact, and the branched precast PSC beam is prevented. The work environment enables the beam and haunt block to be stably mounted with connecting rods.

On the other hand, according to another field of the invention, the present invention, the haunch block mounting step of mounting the haunch block on the top of the piers (coping) continuous two PSC beams in the axial direction; A connecting concrete forming step of placing a branch precast PSC beam on an upper portion of the haunch block and casting curing concrete between an upper surface of the haunch block and a lower surface of the branch precast PSC beam; A haunch block connection fixing step of tensioning and fixing the branch precast PSC beam and the haunch block with a connecting rod; Mounting a precast PSC beam prefabricated so that at least one end is supported by the branch precast PSC beam; Filling connecting concrete or filler in the axial gap between the point precast PSC beam and the precast PSC beam; A sequencing step of successively sequencing the branch precast PSC beam and the precast PSC beam by tensioning a steel rod embedded above the branch precast PSC beam and the precast PSC beam; Tensioning the tension pre-installed in the precast PSC beam and the precast PSC beam to introduce a final prestress; It provides a continuous method of prestressed concrete beam bridge, characterized in that it comprises a concrete beam forming step of forming a concrete beam by forming a concrete bottom plate on top of the precast PSC beam and the precast PSC beam.

Here, between the haunch block mounting step and the haunch block connection fixing step, further comprising the step of fixing the pier and the haunch block with a temporary steel bar so that the haunch block is stably mounted on the pier, haunch block The process of mounting the point precast PSC beam onto the bed and the mounted block can fundamentally prevent the haunt block from falling out of balance and falling or overturning from the piers.

On the other hand, the present invention, in the continuity structure of the prestressed concrete (PSC) beam bridge in which a plurality of PSC beams are connected in the axial direction, the haunch block is formed in which the cross section of the pier is gradually larger than the cross section of the end of the bridge direction Two beams are mounted on successive piers in the axial direction; A portion of the PSC beam is formed of a point portion precast PSC beam provided above the haunch block; Another portion of the PSC beam is axially connected to the branch precast PSC beam; The prestressed concrete beam bridge continuity structure is characterized by connecting the haunch block and the branch precast PSC beam by tensioning the connecting material connecting the precast PSC beam and the haunch block.

On the other hand, the precast PSC beam has an end precast PSC beam, one end of which is connected to the point precast PSC beam and the other end of the precast PSC beam, which is connected to the pier where the PSC beam is not continuous in the axial direction, and both ends of the precast PSC beam. It is divided into an intermediate precast PSC beam which is mounted to be supported. In this case, the intermediate precast PSC beam and the end precast PSC beam may be formed of a segment PSC beam made of a plurality of precasts. In this case, all the segment PSC beams constituting the bridge are manufactured in advance in factories and workshops, and thus, there is an advantage that the construction work in the field becomes very simple and the construction period can be shortened. At this time, the segment PSC beams made of precast are installed in line in the yard in the yard in the axial direction, and connected to each other.In this case, the gap generated between the adjacent segment PSC beams and the beams is reinforced with mortar filler material or In order to maintain the distance between the beam and the beam (approximately 15.0cm), cure concrete in the field and insert the strand into the primary tendon sheath tube and tension it to introduce prestress to connect the segment PSC beams to each other. It is integrated with a precast PSC beam or an end precast PSC beam. By applying this method, which is composed of a number of precast segment PSC beams, the curvature of the bridge has a predetermined curvature rather than a linear shape, that is, curvature can be obtained even in a bridge such as a curved line or a crosoid curve. The construction can be realistically realized.

The length X of the point portion precast PSC beam protruding from the pier is formed from L / 6 to L / 4 of the interval L between the pier, more preferably about L / 5. . This means that in the end-supported continuous structure having an interval of L, the bending moment becomes zero since the position at which the positive and negative moments intersect, that is, the position at which the bending moment becomes zero is approximately about 5/5 from the end. By connecting the branch precast PSC beam and the intermediate precast PSC beam to each other at the peripheral position, it is possible to minimize the breakage of the connection site.

Here, an end of the branch precast PSC beam supporting a central precast PSC beam having both ends connected to the branch precast PSC beam and an end precast PSC beam having one end connected to the branch precast PSC beam. In order to restrain in the direction perpendicular to the axial direction, at this end, the third connection concrete part connected in the direction perpendicular to the axial direction is cast in place, and a tension force in the direction perpendicular to the axial direction is applied to the second tension material penetrating through it.

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

However, in describing the present invention, a detailed description of known functions or configurations will be omitted to clarify the gist of the present invention.

Figure 2a to 2e is a side view showing a continuity structure according to the construction sequence according to the continuous method of precast prestressed concrete beam bridge according to the present invention, Figure 3 is a side view of the intermediate precast PSC beam of Figure 2e, Figure 4 is 3 is a cross-sectional view taken along the cutting line IV-IV of FIG. 3, FIG. 5 is a cross-sectional view taken along the cutting line V-V of FIG. 3, FIG. 6 is a steel box-shaped haunt block and point portion of FIG. 2E according to the first embodiment of the present invention. Perspective side view of the precast PSC beam, FIG. 7 is a side view showing the appearance of FIG. 6, FIG. 8 is a sectional view taken along the cutting line VII-VII of FIG. 6, FIG. 9 is a sectional view taken along the cutting line VII-Ⅸ of FIG. 10 is a cross-sectional view taken along the cutting line VIII-VIII of FIG. 6, FIG. 11 is a perspective side view of the lightweight concrete haunch block and the point precast PSC beam of FIG. 2E according to the second embodiment of the present invention, and FIG. 13 is a side view showing the appearance, FIG. 13 is a cross-sectional view taken along the cutting line of FIG. 4 is a cross-sectional view taken along the cutting line XIV-XIV of FIG. 11, FIG. 15 is a cross-sectional view taken along the cutting line XV-XV of FIG. 11, FIG. 16 is a side view showing the haunch blocks of FIGS. 6 and 11, and FIG. Fig. 18 is a sectional view taken along the cutting line VI-VVI of Fig. 18, Fig. 18 is a sectional view taken along the cutting line VII-V of Fig. 16, Fig. 19 is a perspective view showing the end portion of the point precast PSC beam, Fig. 20 is a point free of Fig. 19. A perspective view showing the ends of an intermediate precast PSC beam in contact with the cast PSC beam, FIGS. 21A-21C illustrate a process in which the ends of FIGS. 19 and 20 are combined, and FIG. 21D is a combination of FIGS. 19 and 20. It is sectional drawing which shows the shape of addition welding, and FIG. 22 is a side view which shows the tension material built in FIG. 2E.

As shown in the figure, the continuous bridge 100 of the prestressed concrete beams according to the first embodiment of the present invention is mounted on a bridge 20 in which the precast PSC beams 120, 130 and 140 are continuous in the axial direction and are hollowed out. The haunch block 110 formed of a steel box of a hollow shape, the branch portion precast PSC beam 120 connected and fixedly coupled to the haunch block 110 and one end portion free of the branch portion An end precast PSC beam 130 connected to the cast PSC beam 120 and the other end connected to the piers 10 where the PSC beams are not continuous in the axial direction, and both ends thereof are supported by the point precast PSC beam 120. The concrete base plate 150 mounted on the upper surface of the intermediate precast PSC beam 140, the branched precast PSC beam 120, the end precast PSC beam 130, and the intermediate precast PSC beam 140 which are mounted to be preferably mounted. ), And fixing the haunch block 110 and the branch precast PSC beam (120) The first connecting concrete 170 and the branch precast PSC beam 120 that are cast and cured therebetween to firmly couple the connecting member 160, the haunch block 110, and the branch precast PSC beam 120. A continuous rod (121,131,141) and PSC beams (120,130,140) that are tensioned in a state buried at both upper ends of the PSC beams (120, 130, 140) so as to successively connect the end precast PSC beam (130) and the intermediate precast PSC beam (140). The second connection concrete 180 is placed between the and the PSC beams (120, 130, 140) tension material (122, 132, 142, 199) for introducing a prestress.

As shown in FIGS. 6 to 10, the haunch block 110 is formed to have a larger cross section than the cross section of the end portion in the axial direction, and the inner portion 110a is formed of a hollow hollow steel box structure. As a light weight structure with a large cross-sectional coefficient, it has an advantageous effect to effectively remove the sub-moment acting on the pier of the continuous PSC beam. Further, a plurality of reinforcing rib plates 111 are formed on the hollow inner surface of the haunch block 110 to effectively resist tensile and compressive stresses, and both side surfaces thereof along the axial direction to serve as a casting boundary wall of the connecting concrete 170. A protrusion 115 protruding upward is formed in the upper portion, and a shear reinforcement plate 113 having a 'T' shape having a head portion formed between the branch precast PSC beam 120 and the haunch block is formed on the upper side of the haunch block 110. Welded to the outer surface. 6 and 9, a support bearing 163 integrally fixed by welding is formed on the upper side of the haunt block 110 so that the branch part precast PSC beam 120 is disposed on the haunt block ( 110 to be spaced apart from the predetermined distance.

When the span span (L) of the bridge is 45 m or less, since the moment is relatively large in the upper portion of the bridge piers of the continuous portion, the cross section of the PSC beam 120 around the bridge may be uniformly formed. In long bridges with a span of longer than 45m, the sub-moment acting around the bridge becomes very large. As shown in FIG. 2E, the branch precast PSC beam 120 is a cross-sectional surface of which a haunch is reinforced. It must be formed. Therefore, when the span is longer than 45m, a haunch block formed as described above is formed to form a cross section between the upper part of the bridge 20 where the large minor moment acts and the branch precast PSC beam 110. By constructing the bridge with the intervening state, it is possible to implement a large side face in the bridge piers of continuous bridges while improving work time and workability of each type.

With the point precast PSC beam 120 mounted on the support bearing 163 of the haunch block 110, the coupling member 160 integrally combines the haunch block 110 with the point precast PSC beam 120. Fix it. More specifically, as illustrated in FIG. 6, the branch precast PSC beam 120 is cast and cured with a plurality of connecting rods 161 and 162 embedded therein, wherein a part of the connecting rods 161 and 162 is embedded. 161 is projected from the bottom of the point precast PSC beam 120 only slightly so that the other end is buried in the connecting concrete 170, the rest 162 of the connecting rods (161, 162) is the haunchi formed of the other end of the steel It protrudes long from the bottom of the point precast PSC beam 120 to be inserted into the block 110. At this time, in a state in which the protruding connecting rod 162 is inserted into the through hole 114 previously formed in the steel haunting block 110, tightening the fixing nut 162a to connect the connecting rod 162 to the steel haunting block ( And fixed to 110, and the curing between the point precast PSC beam 120 and the haunch block 110 by the connection concrete (170) to completely combine. At this time, the through hole 114 is formed sufficiently large compared to the diameter of the steel bar 162 to mount the precast PSC beam 120 on the haunch block 110, the connecting steel rod 162 in the process It is to be easily inserted into the through-hole 114. In addition, the process of fixing the connecting steel bar 162 by the fixing nut 162a is performed by the worker directly entering the entrance 110b to the hollow portion 110a in the haunch block 110 and tightening the fixing nut 162a.

In addition, in order to prevent the concrete from being damaged as the tensile stress caused by the concrete's own weight acts upon the concrete cross section, the primary tendons 122, 132 and 142 introducing the prestress are installed in a curved form. In addition, an alignment fixing socket 124 protruding in one of a male and a male form is installed to facilitate alignment with adjacent PSC beams during construction.

In addition, the branch portion precast PSC beam 120 has a straight line with one end built into the sheath tube 121s so as to be continuous with the adjacent end precast PSC beam 130 or the intermediate precast PSC beam 140. The continuous rods 121, the rod tension fixing grooves 121c formed by cutting the upper surface of the branch precast PSC beam 120 so that one end of the continuous rods 121 are exposed, and one end of the continuous rods 121 A fixing nut (121a) for tightening the steel bar after the introduction of the prestress by tension with the minimized steel bar jack, and a fixing plate (121b) interposed between the fixing nut (121a) and the concrete surface to distribute and transmit the tension of the steel rod to the concrete; The connection nut 121d connecting the continuous steel rods 131 and 141 having one end embedded in the adjacent intermediate PSC beams 130 and 140 and the continuous steel rod 121 having one end embedded in the branch precast PSC beam 120 to each other. ).

One end of the end precast PSC beam 130 is mounted on the piers 10 and the other end is fixedly connected to the branch precast PSC beam 120. Although not shown in the drawing, at the end of the end precast PSC beam 130, there is an alignment fixing socket for alignment with an adjacent PSC beam, and a continuous steel bar 131, one end of which is built up in a sheath tube at the upper side for continuation, It is formed similarly to the fixed socket 124 and the steel bar 121 of the precast PSC beam 120.

Both ends of the intermediate precast PSC beam 140 are fixedly connected to the branch precast PSC beam 120. To this end, as shown in FIG. 20, a fixing socket 144 is formed at its end face so as to be engaged with the fixing socket 124 formed at the end of the branch precast 120 so that two adjacent PSC beams are aligned. . At this time, the number of female and female of the fixed socket is in engagement with the adjacent form, and as shown in FIG. 21D, the left and right deviations during the construction are adjusted by the left and right adjustment plate 88, and the height deviation is the height adjustment plate 77. Adjust with

The intermediate precast PSC beam 140, like the branch precast PSC beam 120, is integrated in one end of the sheath tube 141s so as to be continuous with the adjacent branch precast PSC beam 120. Tension force is introduced into the rod tensioning groove 141c formed by cutting the upper surface of the intermediate precast PSC beam 140 so that one end of the continuation rod 141 and the continuation rod 141 are exposed, and the continuation rod 141. After the fixing nut 141a for fixing it, and a fixing plate 141b for distributing and transmitting the tension force to the concrete structure.

At this time, the sheath pipes 121s and 141s installed in the branch precast PSC beam 120, the end precast PSC beam 130, and the central precast PSC beam 140 are divided into two different PSC beams 120, 130 and 140. Since the continuous steel rods 121, 131, and 141 must be sufficiently moved to align each other, the diameter of the sheath tube is preferably large enough in view of this.

The branch precast PSC beam 120, the end precast PSC beam 130, and the central precast PSC beam 140 are both prefabricated in a precast form at a factory or production site, and are shown as one PSC beam in the drawing. However, two or more may be connected to each other to form a precast segment PSC beam forming one PSC beam. At this time, the length of the segment PSC beam is determined by the length and weight of the precast-type segment PSC beam manufactured at the manufacturing site, and the intermediate free according to the span length of the bridge The number of segment PSC beams should be connected by the length of the cast PSC beam, and the gap between each precast segment PSC beam should be filled with mortar filler and reinforced, or concrete cast between the beam and the beam of a certain distance to connect the two beams. Integrate by By applying this method, which is composed of a number of precast segment PSC beams, the curvature is more realistically realized even when the planar shape of the bridge has a predetermined curvature rather than a linear shape, that is, a bridge such as a curved line or a crosoid curve. Construction is possible.

FIG. 22 shows the arrangement structure of tendons of the point precast PSC beam 120, the end precast PSC beam 130, and the center precast PSC beam 140. Primary tendons 122, 132, and 142 are built into each of the precast PSC beams 120, the end precast PSC beams 130, and the central precast PSC beams 140. It prevents the concrete from being damaged by the tensile stress at the bottom center of the beam generated by the PSC beam or its own weight. In addition, the PSC beams 120, 130 and 140 are continuous by tensioning the linear continuous steel rods 121, 131 and 141 in the axial directions adjacent to the PSC beams 120, 130 and 140, and the secondary shapes in the form of curves in order to penetrate the PSC beams 120, 130 and 140 in order. After tensioning the connecting tendons 199, the final prestress is introduced into the PSC beams 120, 130 and 140, and the bottom plate 150 is poured to form a precast prestressed concrete (PSC) beam.

Hereinafter, the sequencing method of the PSC beam bridge 100 according to the first embodiment of the present invention will be described in detail.

Step 1 : As shown in FIG. 2A, a plurality of permanent bearings 21 are mounted in an axial direction perpendicular to an pier 20 in which two beams are continuous in the axial direction, and the axial direction about the permanent bearing 21. After the two temporary bearings 22 are mounted in the front and rear directions, respectively, as shown in FIG. 17, the hollow box-shaped haunt block 110 of the hollow shape is firmly fixed to the upper part of the piers 20. That is, the steel bar 23 is embedded in the piers 20 in advance, and the connecting screw 23a of a sufficiently long length is fastened to the end exposed to the outside. In this state, the haunch block fixing steel rod 119 is connected to the connecting nut 23a through the fixing fixing plate 118 protruding from the outer surface of the haunch block 110, and the buried steel bar 23 and the connecting nut 23a. The fixed steel rods 119 connected by) are penetrated through the fixed fixing plate 118, and the fixed steel bars 119 are fixed by the fixing nut 119a in the fixed fixing plate 118 to fix the haunting block 110. To be firmly fixed to the upper portion of the piers (20).

Step 2 : The point precast PSC beam 120 is lifted and mounted by a crane while the primary tendon 122 is tensioned on the upper side of the haunch block 110 fixed to the pier 20. At this time, as shown in Figures 6 to 10, the long rods 162 of the connecting rods (161, 162) protruding downwardly fixed to the branch precast PSC beam with a predetermined length is a haunch block ( It is positioned to penetrate through the through-hole 114 formed on the upper surface of the 110. In this state, the branch precast PSC beam 120 is mounted in a state where a neoprene or PTFE rubber pad 163a is placed on the support bearing 163 on the haunch block 110. The height of the top of the precast PSC beam is determined by the thickness of the rubber pad 163a, which is controlled by the final height of the bridge already determined.

At this time, the size of the through hole 114 is formed large enough to enable alignment between the haunt block 110 and the branch precast PSC beam 120 by the crane, and the fixing nut 162a and the haunt block 110. ) Is interposed between a fixing plate 162c that can offset the size of the through hole 114.

Through this type of work, the reinforcing bars 129 protruding from the branch precast PSC beam 120 are installed between the shear reinforcement 113 protruding with the head formed on the upper side of the haunch block 110, and throttled. It acts to restrain each other in the direction and perpendicular to the axial direction.

Step 3 : The worker enters into the hollow space 110a of the steel hunt block 110 through the doorway 110b shown in FIG. 6, at the end of the long connecting steel rod 162 inserted into the steel hunt block 110. The fixing nut 162a is fastened to a fixed strength. By this, the steel haunting block 110 is integrated with the branch precast PSC beam 120 by the tensioned connecting rods 161 and 162.

Step 4 : Placing and curing the connecting concrete 170 between the haunch block 110 and the branch precast PSC beam 120, between the haunch block 110 and the branch precast PSC beam 120. It is in an integrally coupled state that does not allow any relative displacement.

Step 5 : In the state where the steel box-shaped haunch block 110 and the branch precast PSC beam 120 are fixedly mounted on the upper portion of the pier 20, both ends are connected to the branch precast PSC beam 120. The precast PSC beam 140 is mounted. That is, as shown in Figs. 19 and 20, since a plurality of sequential steel bars 121 and 141 protrude from the ends of the branch precast PSC beam 120 and the intermediate precast PSC beam 140, respectively, As shown in FIG. 21A, the lower part of the precast PSC beam 120 is fixedly fixed to the lower end of the intermediate precast PSC beam 140 in the fixed socket 124 protruding from the female shape. The fixed socat 124 of the protruding male shape is moved in the direction of reference numeral 97 so as to be superimposed and aligned.

At this time, the sequential steel rods 121 and 141 protruding from the branch precast PSC beam 120 and the intermediate precast PSC beam 140 allow both ends thereof to be coupled with the connection nut 121d.

When the sequential steel rods 121 and 141 enter the connection nut 121d as appropriate, the branch precast PSC beam 120 and the intermediate precast PSC beam 140 are adjusted to adjust the connection nut 121d, as shown in FIG. 21B. Rotation 98 is adjusted to a length suitable for tensioning the continuous steel rods 121 and 141. At this time, the continuous steel rods 121 and 141 and the connection nut 121d are stacked by the sheath pipe 121e so that they can be smoothly tensioned from the concrete to be poured later. Then, when the alignment between the branch precast PSC beam 120 and the intermediate precast PSC beam 140 becomes good, as shown in FIG. 21D, the height adjustment is performed on the female fixed socket 124. The plate 77 and the plate for width adjustment 88 are properly fitted and then welded 124a to be firmly fixed in a well aligned state.

Step 6 : Then, the plate-shaped formwork 181 is tensioned by the fixing rod 182 at the connection portion of the branch precast PSC beam 120 and the intermediate precast PSC beam 140 to the fixing nut 182a. It is fastened and fixed, and the gap between the branch precast PSC beam 120 and the intermediate precast PSC beam 140 is poured by filling or filling with the second connecting concrete 180.

Step 7 : Then, the other ends of the sequential rods 121 and 141 are tensioned with minimized rod tension jacks to introduce compressive force to the sequential rods 121 and 141, thereby introducing the point precast PSC beam 120 and the intermediate precast PSC beam. Continuation of 140.

Step 8 : In the same manner as in Steps 5 to 7, the end precast PSC beam is connected so that one end is connected to the point precast PSC beam 120 and the other end is mounted on the permanent bearing 11 of another pier 10. 130).

Step 9 : After removing the haunch block fixing steel rods 119 fixed to the piers 20 from the haunch block 110, the second continuous tendon (199) in a curved form penetrating these PSC beams (120, 130, 140) is tensioned and finally Normal prestress is introduced into the continuous bridge (100). Therefore, the haunch block fixing steel rods 119 used to install the haunch block 110 can be reused at other construction sites.

Step 10 : Then, the bottom plate 150 is casted on the finally continuous PSC beams 120, 130 and 140 to form a precast prestressed concrete beam.

Hereinafter, a second embodiment 200 of the present invention will be described in detail.

As shown in the figure, the continuous bridge 200 of the prestressed concrete beam according to the second embodiment of the present invention, as in the first embodiment, the PSC beams 220, 130, 140 on the bridge 20 in the axial direction continuous Mounted to the haunch block 210 formed of lightweight concrete, fixed point precast PSC beam 220 connected integrally with the light weight concrete haunch block 210, and one end to the precast PSC beam 220 An end precast PSC beam 130 connected to the other end and supported by the piers 10 in which the PSC beams are not continuous in the axial direction, and an intermediate precast PSC beam 140 mounted at both ends thereof to be connected to the branch precast PSC beam. ), A concrete base plate 150 mounted on the upper surfaces of the PSC beams 220, 130, and 140, a connection member 260 connecting and fixing the lightweight concrete haunch block 210 and the branch precast PSC beam 220, and a haunch. Block 210 and Branch Precast PSC Beam 220 A continuous connecting rod squeezed with both sides of the PSC beams embedded to continually continually cure the first connecting concrete 270 placed therebetween to be firmly coupled and the branch precast PSC beam and the intermediate precast PSC beams. 121, 131, and 141, second connection concrete 180 placed between the PSC beams, and tension members 122, 132, 142 and 199 for introducing prestress to the PSC beams 220, 130, and 140.

That is, the configuration 100 of the second embodiment according to the present invention is the configuration of the light-weight concrete haunting block 210 and the coupling method of the point concrete PSC beam 220 and the configuration 100 of the first embodiment described above. Have different characteristics.

More specifically, as shown in Figures 11 to 15, the lightweight concrete haunch block 210 is formed with a plurality of through holes along the axial direction, the through hole is a sheath pipe 262 is embedded, the unit the weight per volume is formed by 1.5ton / m ³ to 1.8ton / m ³ of light-weight concrete becomes more easy to handle, as the weight is decreased. 13 to 15, the lightweight concrete haunch block 210 has a U-shaped concave portion 210a having an inclined cross-sectional shape formed on an upper surface thereof, as shown in FIG. 11. Likewise, a bearing 263 is mounted on the recess 210a to mount the branch precast PSC beam 220.

Similarly, the branch precast PSC beam 220 is formed with a plurality of through holes to be aligned with the through hole sheath pipe 262a formed in the haunch block 210, and the sheath pipe 262b is embedded in the through hole. The secondary precast PSC beam 220 and the lightweight concrete haunt block 210 should be aligned with each other, and the connecting steel rods should be inserted through the through hole sheath pipes 262a and 262b embedded in the PSC beam and the haunch block on the PSC beam. Therefore, it is preferable that the diameter of the sheath tube is sufficiently large in view of this.

As shown in FIGS. 13 to 15, the side surfaces 220a and 220b of the lower flange of the central portion in the axial direction are spaced apart from the concave side surface of the haunch block 210, but the side of the lower flange of the end portion in the axial direction. 220c is formed to be in close contact with the indentation side of the haunch block 210. Thus, in the state where the branch precast PSC beam 220 is mounted on the bearing 263 on the haunch block 210, the branch precast PSC beam 220 is mounted to interlock with the haunch block 210. The constrained state in the direction perpendicular to the axial direction is implemented, so that the point portion on the haunt block 210 is not connected and fixed to the haunt block 210 and the precast PSC beam 220 by the connecting steel rod 261. It is possible to stably mount the precast PSC beam 220.

Hereinafter, the sequencing method of the PSC beam bridge 100 according to the second embodiment of the present invention will be described in detail.

Step 1 : As shown in FIG. 2A, a plurality of permanent bearings 21 are mounted in an axial direction on a pier 20 where two beams are continuous in an axial direction, and two temporary bearings 22 are mounted in an axial direction. Then, as shown in Figure 18, the lightweight concrete haunch block 210 is firmly fixed to the top of the piers (20). That is, the steel bar 23 is embedded in the piers 20 in advance, and the connection nut 23a of a sufficiently long length is fastened to the end exposed to the outside. In this state, the haunch block fixing steel bar 219 penetrates the through hole passing through the haunch block 210 and is connected to the buried steel bar 23 by the connection nut 23a, and the upper side of the haunch block fixing steel bar 219 is opened. By tightening and fastening with the fixing nut 219a, the haunch block 210 is firmly fixed to the upper portion of the piers 20.

Step 2 : The point precast PSC beam 220 is pulled by a crane while the primary tendon 122 is tensioned, and the through hole sheath pipe formed in the point precast PSC beam 220 and the haunch block 210. The point precast PSC beam 220 is mounted on the lightweight concrete haunt block 210 such that the 262a, 262b are aligned with each other. At this time, the point portion precast PSC beam 220 is mounted on the bearing 263 disposed in the recess of the haunch block 210 with the rubber pad 263a interposed therebetween. Here, the height of the upper end of the precast PSC beam is determined by the thickness of the rubber pad 263a, which is adjusted by the final height of the bridge which has already been determined.

As such, the branch precast PSC beam 220 is disposed on the haunt block 210 with the through hole sheath tubes 262a and 262b formed in the haunch block 210 aligned with each other. ), The inclined 'U' of the lower flange side 220c of the point precast PSC beam 220 and the recessed portion of the haunch block 210 at both end positions in the axial direction of the haunch block 210. As the chairs abut each other, the point precast PSC beam 220 on the haunch block 210 is mounted in a constrained posture where oscillation does not occur. At this time, a rubber pad 280b is interposed between the lower flange side 220c of the branch precast PSC beam 220 and the inclined 'U' of the recess of the haunch block 210 to intersect with each other. The cast PSC beam 220 is mounted in a more stable posture. At the same time, in the central position of the haunch block 210, the operator's hand is placed between the lower flange side 220c of the branch precast PSC beam 220 and the inclined 'U' face of the recess of the haunch block 210. There is a passageway through which it can go and where concrete can be poured. Optionally, a passage 230a may be formed to penetrate the spot precast PSC beam 220 so that concrete can be poured.

Step 3 : With the through hole sheath pipes 262a and 262b formed in the branch precast PSC beam 220 and the haunch block 210 aligned with each other, the connecting steel bar 261 is connected to these through hole sheath pipes 262a, Through 262b). At this time, one side of the connecting steel bar 261, the fixing nut 261a is fastened through the upper side to the lower side, and the connecting steel bar located between the haunch block 210 and the branch portion precast PSC beam 220 A sheath tube surrounding the 261 is inserted into the gap between the branch precast PSC beam 220 and the haunch block 210, and cut and installed.

Step 4 : Mixing of the high fluidizing agent between the haunch block 210 and the branch precast PSC beam 220 to firmly couple the lightweight concrete haunch block 210 and the branch precast PSC beam 220. It is poured by concrete 270 and cured. Through this, the connection concrete 270 to be poured smoothly flows from the lower portion of the branch precast PSC beam 220 to penetrate every corner, the haunch block 210 and the branch precast PSC beam 220 is Do not allow relative displacement. Then, by installing the fixing nut 261a below the haunch block 210 and by tensioning the connecting steel rod 261 above the PSC beam, the haunch block 210 and the branch precast PSC beam 220 are integrally coupled. Let's do it.

Other steps 5 to 10 are the same as or similar to the first embodiment described above. That is, while the haunch block 210 and the branch precast PSC beam 220 are fixedly mounted on the pier 20, the branch precast PSC beam 220 is illustrated in FIGS. 19 to 21D. ) To mount the intermediate precast PSC beam 140 so that both ends are connected. Then, after fixing with a fixed steel bar to form a flat formwork on the bottom surface of the connection portion between the branch portion precast PSC beam 220 and the intermediate precast PSC beam 140, the branch portion precast PSC beam 220 And fills the gap between the intermediate precast PSC beam 140 with the second connection concrete 180 and cures it.

 Then, one end of the sequential steel bar is tensioned to continualize the point precast PSC beam 220 and the intermediate precast PSC beam 140. In addition, one end is connected to the branch precast PSC beam 220 and the other end 10 is mounted on the end precast PSC beam 130 so that the other end is mounted, and then the PSC beams 220, 130, 140 continuous by a continuous rod. The second continuous tendon 199 in the form of a curve passing through the tension is tensioned to introduce the final prestress into the continuous bridge 200. Then, the bottom plate 150 is poured into concrete on the finally continuous PSC beams 220, 130, and 140 to form a prestressed concrete beam.

However, in the second embodiment of the present invention, since the haunch block fixing steel bar 219 used to fix the lightweight concrete haunch block 210 is buried in the haunch block 210, unlike the first embodiment, another construction site It becomes difficult to reuse.

In the above, the preferred embodiments of the present invention have been described by way of example, but the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

That is, in the embodiment of the present invention, the three-span continuous bridge has been described as an example, but the present invention is equally applicable to not only the two-span continuous bridge but also the four or more continuous bridges.

As described above, the present invention is a continuous structure of a prestressed concrete beam bridge in which a plurality of PSC beams are connected in an axial direction, and a haunch block mounted on an upper part of a pier in which two beams are continuous in a axial direction (coping). ; A point portion precast PSC beam mounted on the haunch block and installed in a plurality of orthogonal directions; A connecting member for connecting and fixing the haunch block and the branch precast PSC beam; Connecting concrete cast and cured between the haunch block and the branch precast PSC beam; A precast PSC beam installed in the axial direction such that at least one end thereof is supported by the branch precast PSC beam; A continuous steel rod that is tensioned in a state in which upper sides of the PSC beams are connected to continually connect the PSC beams; A tension member for introducing prestress into the PSC beams; The point portion on the haunch block is configured to include a concrete bottom plate formed by including the concrete on the upper side of the PSC beam, to have a large edge section on the continuous portion of the pier where the large moment moment is concentrated in the continuous bridge By providing the precast PSC beams in combination, the continuous structure of the prestressed concrete beam bridges and the construction thereof are provided so that the longer the span of the continuous bridge can be easily constructed while effectively canceling the larger moment acting.

Through this, the present invention, in the continuous bridge formed by the cross-section of the cross section of the PSC beam of the bridge portion is greatly increased as the span is formed long, the weight of the PSC beam is very heavy as the cross section of the PSC beam is increased With the certain restrictions on transporting and pulling the PSC beam, it is possible to solve the problem that the workability is greatly deteriorated at once, and to form an edge section between the upper part of the pier where the large minor moment acts and the branch precast PSC beam. Continuous bridge construction of prestressed concrete beam bridges that can easily implement large edges in the pier of continuous bridges by improving bridge construction of bridges by improving bridge construction time. And the method thereof.

In addition, the PSC beams according to the present invention are all precast, so that the construction work can be minimized in the workshop or on-site, so that construction can be performed within a short construction period as well as beam bridges. It has the advantageous effect that the sequencing of is very simple.

In addition, according to the present invention, as the concrete diaphragm protrudes from the precast PSC beam in the axially perpendicular direction, the concrete is cast in the axially perpendicular gap between the diaphragms, and the diaphragms and the precast PSC beams are By tensioning the tendons penetrating in the perpendicular direction, the spacing between the PSC beams in the perpendicular direction can be kept constant, and the respective PSC beams in the perpendicular direction are not individually carrying loads, Since the PSC beams are transferred to the plate by acting as a rectangular plate structure constrained to each other, it realizes a more stable load support structure against external forces such as earthquakes as well as the live load transmitted from the concrete floor plate.

In addition, the present invention, by using the light-weight concrete as the material of the haunch block concrete, the cross-sectional coefficient of the structure used is the same, but by reducing the weight itself, the effect of reducing the moment generated in the continuous portion of the bridge part of the continuous bridge Get

In addition, the present invention does not cast and cure concrete in the field by using a precast segment PSC beam manufactured in a factory or a manufacturing site and transported and assembled to a site, thereby simplifying the work required for sequencing and greatly increasing the construction period. It can be shortened, and because it is composed of a plurality of precast segment PSC beam, even if the planar shape of the bridge has a curvature such as a circular curve or a crossoid curve, it is possible to construct a curvature.

Claims (9)

A continuous structure of prestressed concrete (PSC) beam bridges in which a plurality of PSC beams are connected in the axial direction, A haunch block in which a cross section of the pier is formed larger than a cross section of an end portion in the axial direction, and mounted on a pier where two beams are continuous in the axial direction; A point precast PSC beam mounted on the haunch block and installed in a plurality of orthogonal directions; A connecting member for connecting and fixing the haunch block and the branch precast PSC beam; Connecting concrete cured in situ between the haunch block and the branch precast PSC beam; A precast PSC beam installed in the axial direction such that at least one end thereof is supported by the branch precast PSC beam; A continuous steel rod which is tensioned in a state in which the branch precast PSC beam and the upper side of the precast PSC beam are connected to continually concatenate the branch precast PSC beam and the precast PSC beam; A tension member for introducing prestress into the branch precast PSC beam and the precast PSC beam; The continuous structure of the prestressed concrete beam bridge, characterized in that it comprises a concrete bottom plate formed by including the concrete on the upper portion of the precast PSC beam and the precast PSC beam. The method of claim 1, The haunch block is a continuous structure of the prestressed concrete beam bridge, characterized in that formed of a hollow steel box-shaped structure. The method of claim 2, On the haunch block, the continuous structure of the prestressed concrete beam bridge, characterized in that it further comprises a bearing for mounting the point portion precast PSC beam while separating the haunch block and the point portion precast PSC beam. The method of claim 1, The haunch block is formed of a concrete formed with a recess groove for receiving a portion of the lower portion of the precast PSC beam, the bearing is disposed on the recessed groove of the haunch block spaced apart from the precast PSC beam , The connection between the spot precast PSC beam and the bottom surface of the recessed part of the haunch block as the spot precast PSC beam is spaced apart from the bottom surface of the recessed part of the haunch block by the bearing on the haunch block. A continuous structure of the prestressed concrete beam bridge, characterized in that the passageway through which concrete can be introduced. The method of claim 4, wherein The connecting member is a continuous structure of the prestressed concrete beam bridge, characterized in that the one end is embedded in the branch precast PSC beam and the other end is fixed to the haunch block fixed tension. The method of claim 5, The top surface of the haunch block is recessed to receive a portion of the lower portion of the branch precast PSC beam, In the state before the point precast PSC beam is mounted on the haunt block and before the connection concrete is placed, the lower side of the point precast PSC beam is located at the center in the axial direction of the haunch block. Although not in contact, the lower side of the point precast PSC beam is in contact with the haunch block and restrained in the perpendicular direction of the axial block at a position spaced apart from the central portion of the haunch block. Serialization structure. The method according to claim 5 or 6, The haunch block is a continuous structure of prestressed concrete beam bridge, characterized in that formed of lightweight concrete. In the continuity structure of prestressed concrete (PSC) beam bridge in which a plurality of PSC beams are connected in the axial direction, A haunch block whose cross section is gradually larger than the cross section of the end portion in the axial direction is mounted on the pier where two beams are continuous in the axial direction; A part of the plurality of PSC beams is formed of a point portion precast PSC beam provided above the haunch block; Another portion of the plurality of PSC beams is connected by tension of the tension member in the axial direction to the point precast PSC beam; The structure of the prestressed concrete beam bridge, characterized in that the haunch block and the branch precast PSC beam is connected by the tension of the connecting material connecting the point precast PSC beam and the haunch block. A haunch block mounting step of mounting a haunch block having a larger cross section than the end of the end of the pier in a pier where two beams are continuous; A connecting concrete forming step of placing a branch precast PSC beam on an upper portion of the haunch block and casting curing concrete between an upper surface of the haunch block and a lower surface of the branch precast PSC beam; A haunch block connection fixing step of connecting and fixing the branch precast PSC beam and the haunch block with a connecting rod; Mounting a precast PSC beam prefabricated so that at least one end is supported by the branch precast PSC beam; Filling connecting concrete or filler in the axial gap between the point precast PSC beam and the precast PSC beam; A sequencing step of successively sequencing the branch precast PSC beam and the precast PSC beam by tensioning a steel rod embedded above the branch precast PSC beam and the precast PSC beam; Tensioning the tension material imparted to the branch precast PSC beam and the precast PSC beam to introduce a final prestress into the branch precast PSC beam and the precast PSC beam; Concrete beam forming step of forming a concrete beam by forming a bottom plate on top of the precast PSC beam and the precast PSC beam portion; A continuous method of prestressed concrete beam bridge, characterized in that it comprises a.

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