KR102316270B1 - Prestressed Concrete Girder - Google Patents

Abstract

The present invention relates to an arched prestressed concrete girder capable of combining a post-construction shear connector capable of forming a pier with a bridge structure (Br) on land and a pier structure at sea. In this possible arched prestressed concrete girder, an arcuate lower flange forming an upward curvature in the longitudinal direction, an upper abdomen extending upward from the arcuate lower flange to stand up, and an upper flange are formed at the upper end of the abdomen, and the arcuate prestressed A first sheath pipe having an upward curvature with respect to the longitudinal direction is provided inside the concrete girder, and a first tension material is inserted into the first sheath pipe and fixed to the first anchoring holes at both ends of the arched prestressed concrete girder, The first anchorage is formed at a position lower than the uppermost end of the first sheath pipe, and a block-out part recessed in the longitudinal direction is formed in the center of the upper surface on the upper flange, and the block-out part is a longitudinal section of the arch-shaped prestressed concrete girder. It is formed in the shape of a standard upper and lower beam, and on both sides of the inner surface of the block-out part, the inner reinforcement of the arched prestressed concrete girder is spaced apart from each other in the lateral direction, and partially buried and partially exposed when the arched prestressed concrete girder is formed and protrudes It includes a transverse anchor reinforcing bar formed in the form of an anchor, and a longitudinal anchor reinforcing bar fastened in the longitudinal direction to the protruding lateral anchor reinforcing bar is provided, supported by the longitudinal anchor reinforcing bar, fastening with the longitudinal anchor reinforcing bar Post-construction front end comprising a post-construction shear connector capable of position movement is formed, and a widened portion is formed in the fulcrum portion of the abdomen, and a steel rod anchorage for continuation with a neighboring arch-shaped prestressed concrete girder is formed in the widened portion Forms an arched prestressed concrete girder that can be joined with a connecting member.

Description

Arched Prestressed Concrete Girder with Post-Construction Shear Connections Possible {Prestressed Concrete Girder}

The present invention relates to an arched prestressed concrete girder capable of combining a post-construction shear connector capable of forming a pier with a bridge structure (Br) on land and a pier structure at sea.

Patent Document 001 discloses that by forming shear studs in the shear pocket and general parts, the composite performance between the upper slab and the upper flange can be improved, and the upper slab can be quickly and easily extruded along a steel pipe rail or a cut railway rail. , formwork and rail

Provided are an extrusion apparatus and a construction method for the upper slab extrusion of a bridge using The extrusion apparatus for extruding an upper slab of a bridge using a formwork and rails includes: a formwork disposed on an extrusion slab workbench and forming a tunnel under the upper slab segment; a pocket formwork fastened to the upper part of the formwork to form a shear pocket part on the upper slab segment; a fabrication table flange for guiding the extrusion of the upper slab segment and on which the formwork and pocket formwork are disposed; a rail disposed along the upper flange of the girder to adjust the transverse direction of the upper slab segment; an extrusion jack disposed on the flange of the production table and continuously extruding the upper slab segment having a shear pocket opening on the upper flange; and a shear stud serving as a shear connector when synthesizing the upper slab segment and the upper flange.

Patent Document 002 relates to a construction method of a bridge, and more specifically, in a bridge constructed using a precast laminated plate, a connection structure such as a connecting material and a connecting plate for connecting a precast laminated plate and a girder is improved, and It relates to a construction method of a bridge that allows easy installation and dismantling of the bridge by introducing a crane on the precast multilayer plate to install and dismantle it, thereby facilitating recycling and maintenance, and shortening the construction period. The present invention improves the connection structure such as a connecting material and a connecting plate for connecting the precast clad plate and the girder in a bridge constructed using a precast clad plate, and installs and dismantles the precast clad plate by introducing a crane on it And by allowing the connection material to be installed after the precast cladding is installed, the installation and dismantling of the bridge is easy, which makes recycling and maintenance easy, and the construction period can be shortened. In addition, since the connecting material may be installed later than the precast covered plate, it is easy to adjust the installation position or the horizontality of the precast covered plate. In addition, by using the precast cladding plate, there is no decrease in durability due to long-term use, noise reduction and anti-slip performance are excellent due to non-use of steel, and maintenance is unnecessary because there is no need for an upper coating.

Patent Document 003 relates to a precast concrete panel, a manufacturing method thereof, and a bridge slab construction method using the precast concrete panel. Temporary reinforcing materials for protection are combined at the time of panel manufacturing, and the temporary reinforcing material is simply dismantled at the site after the movement is completed. By making a number of concave grooves in the upper section of the panel during separation, the horizontal shear force can be strengthened when applied to bridge slab construction to maximize the composite power with concrete poured on site on the upper part of the panel, and after the temporary reinforcement is separated By combining the bonding member for the bonding of the temporary reinforcement and using it as a shear connection material, reinforcing reinforcement works in the field on the upper surface of the bonding member used as such a shear connection material and the upper surface of the panel, unlike in the past, when applied to the construction of bridge slabs By improving the workability of on-site reinforcement work for the upper part of the panel, it is possible to significantly improve the workability of the bridge slab. The effect of the precast concrete panel according to the present invention, a method for manufacturing the same, and a method for constructing a bridge slab using the precast concrete panel will be described as follows. First, in order to prevent cracks during the movement of the panel, temporary reinforcing materials, which are the main cause of cracking, are combined at the time of panel manufacturing to protect them until the completion of movement. It is possible to prevent the occurrence of cracks during panel movement by solving the causes of cracks. Second, when the temporary reinforcement is separated, the cross section of the panel forms a number of concave grooves on the top, so that when applied to the bridge slab construction, the horizontal shear force can be strengthened, thereby maximizing the composite power with the concrete poured on the top of the panel. Third, after separation of the temporary reinforcement, the bonding member for the bonding of the temporary reinforcement is combined and used as a shear connection material. When applied to the construction of bridge slabs, the workability for on-site reinforcement work on the upper part of the panel can be improved, and the workability for the bridge slab can be significantly improved.

Patent Document 004 discloses that in bridge construction using a composite girder for an arch-shaped bridge including girder concrete, steel, and tension material, multi-level tension is introduced to the upper and lower parts of the girder to increase structural efficiency, and easy pouring and compaction of girder concrete It relates to a bridge construction method using an arch-shaped composite girder for bridges, which facilitates quality control and enables re-tensioning and fixation of tension members required for subsequent maintenance. In order to achieve the above technical task of the present invention, when first tensioning a composite girder composed of external steel and girder concrete, before introducing the tension to the tension member at the lower edge of the existing girder, the tension member is installed in the concrete of the upper edge of the girder central part to introduce the tension force. By doing so, the initial compressive stress is generated in the concrete at the center of the girder, and

By increasing the amount of tension that can be introduced, it is possible to increase the efficiency of the tension member or increase the cross-sectional area of the tension member, thereby lowering the position of the neutral axis and increasing the stiffness. On the other hand, in introducing the tension of the tension member, a method of sequentially tensioning the tension member rather than the multi-step tensioning method of the entire tension member is chosen, and a work space for tensioning and fixing the outer tension member among the existing lower edge tension members at the end will be formed in the external steel itself. In order to make the secondary tension on the abutment possible regardless of the presence or absence of the chest wall, re-tensioning or replacement during maintenance was facilitated. In addition, a continuous channel for pouring concrete was formed on the upper surface of the external steel to facilitate pouring and compacting of the concrete on the girder. Since the upper surface of the external steel receives a large tensile stress from the end to the center by the introduction of the tension force, the concrete pouring passage is formed relatively large at both ends of the external steel, and the loss of the steel cutting surface is reduced and filled in the central part. In order to reduce the increase in self-weight due to the amount of concrete, it should be formed relatively small. As a result of this, the shape of the concrete formed inside, the arch rib concrete maintains the existing shape, and the column part concrete is continuously connected to the arch rib concrete in the longitudinal direction.

US 10-1230049 B1 (registration date January 30, 2013) US 10-1588593 B1 (registration date January 20, 2016) US 10-1921715 B1 (registration date November 19, 2018) US 10-0999019 B1 (registration date December 01, 2010)

Conventional prestressed concrete girder (Prestressed Concrete Girder (PSC)) is a reinforcing bar inside, it is manufactured so that the prestress is introduced using a tension material. Accordingly, the prestressed concrete girder is mounted to support the branch in the longitudinal direction on the pier, and the slab constituting the floor plate is constructed by pouring the formwork on the upper prestressed concrete girder. Such slabs were separately constructed after the prestressed concrete girders were constructed, as a traditional method of forming a bridge structure. However, in recent years, the precast concrete slab method, which integrates the segment-fabricated floor plate by pre-fabrication and then seating it on the upper surface of the prestressed concrete girder, is known and widely used. Specifically, in order to form the precast deck on the upper surface of the girder, a shear pocket is formed in the precast bottom plate, and shear connectors such as stud bolts protruding from the upper surface of the prestressed concrete girder are inserted through these shear pockets. It is unified by pouring mortar, etc. However, in protruding and extending the shear connector on the upper surface of the prestressed concrete girder, the shear pocket, which has a limited position and size due to manufacturing errors and construction errors, is not accommodated in the arranged position, so it is biased toward one side inside the shear pocket Problems such as placement or not being included in the shear pocket area occurred, and problems of field applicability such as deforming the shear connector or, in the extreme, removing the shear connector, and re-constructing a separate anchor coexisted. In the present invention, it is intended to develop and propose an arch-type prestressed concrete girder capable of recognizing the above-mentioned problems of combining precast floor plates, and combining post-construction shear connectors.

The present invention for achieving the above object is an arcuate prestressed concrete girder capable of combining a post-construction shear connector, comprising: an arcuate lower flange forming an upward curvature with respect to the longitudinal direction; and an abdomen extending upward from the arcuate lower flange to stand up; and an upper flange formed at the upper end of the abdomen, and a first sheath pipe having an upward curvature in the longitudinal direction in the arcuate prestressed concrete girder, wherein the first tension member is inserted into the first sheath pipe Is fixed to the first anchoring hole at both ends of the arch-shaped prestressed concrete girder; the first anchorage is formed at a position lower than the uppermost end of the first sheath pipe; and the upper flange is vertically recessed in the center of the upper surface A block-out part; is formed, wherein the block-out part is formed in the shape of a downward beam based on the longitudinal cross-section of the arcuate prestressed concrete girder; On both sides of the inner surface of the block-out part, the internal reinforcement of the arcuate prestressed concrete girder is formed. Transverse anchor reinforcement that is spaced apart from each other in the transverse direction and formed in a partially buried and partially exposed protruding form when the arch-shaped prestressed concrete girder is formed A longitudinal anchor reinforcing bar; is provided, supported by the longitudinal anchor reinforcing bar, a post-construction shear connector capable of moving the fastening position with the longitudinal anchor reinforcing bar; is formed, and a widening portion is formed at the fulcrum portion of the abdomen , In the widening part, a steel bar anchorage for continuation with the neighboring arch-shaped prestressed concrete girder; includes being formed.

In addition, the post-construction shear connector further includes being formed in one or more reverse 'w' shape.

In addition, the post-construction shear connecting material further includes a polyamide;

In addition, the steel rod anchoring hole adjacent to the adjacent arc-shaped prestressed concrete girder point portion passing through the abdomen; further includes a fixing.

By applying the arched prestressed concrete girder that can be combined with the post-construction shear connector of the present invention, the precast floor plate is seated on the upper surface of the prestressed girder. In order to solve the problem that the position of the shear pocket of the precast floor plate formed under the same conditions during designing does not match, the shear connector formed on the upper surface of the prestress girder is installed on the precast floor plate after the precast floor plate is seated. By inserting through the shear pocket and binding to the anchor reinforcing bar of the blockout part formed on the upper surface of the prestressed girder, and pouring mortar, the problem of errors in the connection between the precast concrete floor plate and the prestressed girder caused by the conventional pre-construction shear connector is fundamentally solved. can be solved with

1 is a perspective view showing a bridge in which an arch-shaped prestressed concrete girder capable of combining a post-construction shear connector of the present invention is installed;
Figure 2 is a view showing an arched prestressed concrete girder capable of combining the post-construction shear connector of the present invention;
3 is a view showing the arrangement of the sheath pipe and reinforcing bars when manufacturing the arched prestressed concrete girder capable of combining the post-construction shear connector of the present invention in order to show the arrangement of the sheath pipe;
4(a) and 4(b) are views showing the block-out part and the lateral anchor reinforcement and longitudinal anchor reinforcement of the arched prestressed concrete girder capable of combining the post-construction shear connector of the present invention;
5 is a view showing the installation of the post-construction shear connector in the blockout part of the arch-shaped prestressed concrete girder capable of combining the post-construction shear connector of the present invention;
6 is a view showing the widening part and the steel rod anchorage of the arch-shaped prestressed concrete girder capable of combining the post-construction shear connector of the present invention;
5(a) and 5(b) are views showing concrete filling in the shear hole and steel anchor of the precast floor plate for cantilever of the bridge structure (Br) of the present invention;
7 to 10 are views showing the completion of the bridge superstructure by combining the post-construction shear connecting material and the precast floor plate after the formation of the arch-shaped prestressed concrete girder capable of combining the post-construction shear connector of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0023] Reference is made to the accompanying drawings, which show by way of illustration specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that various embodiments of the present invention are different but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention in relation to one embodiment. In addition, it should be understood that the position or arrangement of individual components in each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the following detailed description is not intended to be taken in a limiting sense, and the scope of the present invention is limited only by the appended claims, along with all equivalents as claimed by the claims. Like reference numerals in the drawings refer to the same or similar functions throughout the various aspects.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present invention pertains can easily practice the present invention.

In the arched prestressed concrete girder 100 that can be coupled with the post-construction shear connector 180, the arched lower flange 110 and the arcuate lower flange 110 that form an upward curvature in the longitudinal direction extend upward from the standing An upper flange 130 is formed on the upper part of the abdomen 120 and the upper part of the abdomen, and a first sheath pipe 140 having an upward curvature in the longitudinal direction is provided inside the arcuate prestressed concrete girder, and the first A first tension material is inserted into the sheath pipe and fixed to the first anchoring holes 142 at both ends of the arch-shaped prestressed concrete girder, the first anchoring hole being formed at a position lower than the uppermost end of the first sheath pipe 140, The upper flange is formed with a block-out portion 150 recessed in the longitudinal direction in the center of the upper surface, and the block-out portion is formed in the shape of a downward beam based on the longitudinal cross-section of the arcuate prestressed concrete girder 100, the block On both sides of the inner surface of the outer part 150, the inner reinforcement of the arched prestressed concrete girder is coupled to the internal reinforcement of the arched prestressed concrete girder at regular intervals in the transverse direction, and is partially buried and partially exposed when forming the arched prestressed concrete girder. It includes an anchor reinforcing bar 160, and a longitudinal anchor reinforcing bar 170 fastened in the longitudinal direction to the protruding lateral anchor reinforcing bar is provided, and is supported by the longitudinal anchor reinforcing bar, and the longitudinal anchor reinforcing bar 170 and A post-construction shear connector 180 capable of moving the fastening position of Forms an arch-shaped prestressed concrete girder capable of combining post-construction shear connectors including the formation of a steel bar anchorage 191 for continuation.

The purpose of forming the above configuration is to improve the problem when applying a conventional precast deck, and by seating the precast deck on the top surface of the prestress girder, the girder top surface due to errors generated in the process of constructing the bridge. Recognition of the problem started in that the position of the shear connector pre-constructed in the design did not match the shear pocket of the precast floor plate formed under the same conditions at the time of design.

In order to solve the above problems, a shear connector basically formed on the upper surface of the prestressed girder is inserted through the shear pocket formed on the precast bottom plate after the precast bottom plate is seated. 150), and by pouring mortar, it is possible to fundamentally solve the problem of connection error between the precast concrete floor plate and the prestressed girder caused by the conventional pre-construction shear connection material. To this end, in the present invention, the configuration of the girder is formed as a prestressed concrete girder, and the prestressed concrete girder is formed in an arcuate shape to form and shape a long-span bridge structure and secure it.

The arched prestressed concrete girder has an upward curvature in the longitudinal direction, and when viewed from the girder side, the lower part of the girder is curved upward, so that the center of the girder is thin and the end of the girder is gradually thickened. This arch-shaped prestressed concrete girder forms a basic I-shaped PSC girder configuration of the upper flange 130, the abdomen 120, and the lower flange, and it should be understood that the lower flange of the girder is formed in an upward curvature.

In addition, as a feature of the present invention, the shape of the tension member disposed inside the arched prestressed concrete girder 100 may be arranged to form an upward curvature in the longitudinal direction. In detail, a tension member is disposed inside the arcuate prestressed concrete girder, and a first sheath pipe 140 that has an upward curvature with respect to the longitudinal direction is provided, and a first tension member is inserted into the first sheath pipe to form the arcuate prestress. It is fixed to the first anchoring holes 142 at both ends of the rest concrete girder. Accordingly, the first anchorage is formed at a position lower than the uppermost end of the first sheath pipe 140 , and inside the arch-shaped prestressed concrete girder 100 , the second, third ... An n-th sheath tube is disposed therein, and the second, third ... The n-th tension member is inserted and formed to serve as a prestressed concrete girder. The second, third... The n-th sheath tube and the second, third... The configuration of the n-th tension member is arranged in various directions such as horizontally and vertically inside the girder according to the length, width, height, etc. of the girder, and can form various curvatures. As described above, by forming the upward curvature of the first sheath pipe, there is an effect of expanding the tension force distribution of the tension material up to both ends of the arched prestressed concrete girder.

In addition, the upper flange 130 of the arch-shaped prestressed concrete girder is formed with a block-out portion 150 that is longitudinally recessed in the center of the upper surface. The block-out part is recessed for the coupling of the post-construction shear connector 180 described above, and it is understood as a mortar pouring space for integrating the conventional shear connector with the arch-shaped prestressed concrete girder and the seating space of the post-construction shear connector. easy. The block-out part 150 is formed in the shape of a downward beam based on the longitudinal cross-section of the arcuate prestressed concrete girder 100 , which improves the fastening force with the mortar poured after the post-construction shear connector 180 is inserted and prevents separation It is easy to understand that the trapezoidal block-out portion of the upper and lower light is formed as a shape limitation for the .

As the mortar to be poured on the block-out part 150, ultra-high performance concrete (UHPC) may be applied.

This is to improve the reliability of the coupling between the block-out part and the post-construction shear connector and the precast bottom plate on which the shear pocket is formed.

On both sides of the inner surface of the block-out part 150, the inner reinforcement reinforcement of the arch-shaped prestressed concrete girder is spaced apart from each other in the lateral direction for fastening, support, and integration of the post-construction shear connector 180, and the arcuate prestress When the rest concrete girder is formed, it is partially buried and partially exposed and includes a transverse anchor reinforcing bar 160 formed in a protruding form. The transverse anchor reinforcement is formed in an expanded form from the reinforcement reinforcement for forming the arched prestressed concrete girder 100, and the post-construction shear connection material to be connected in the future is the same as the conventional pre-construction shear connection material, or the shear force of improved performance It is formed in a combined form from reinforcement reinforcement, which is a structural material of the arched prestressed concrete girder, and is partially embedded in the concrete poured when manufacturing the arched prestressed concrete girder, and some of which protrude on both sides of the inner surface of the block-out part. will be formed in the form.

In addition, the longitudinal anchor reinforcement 170, which is movably supported by inserting the post-construction shear connector 180, may be fastened to the protruding transverse anchor reinforcement 160. The longitudinal anchor reinforcing bar is supported by a plurality of the lateral anchor reinforcing bars, and is continuously formed in the longitudinal direction of the arched prestressed concrete girder 100 capable of coupling the post-construction shear connecting material. The longitudinal anchor reinforcement 170 is supported by the longitudinal anchor reinforcement and includes a post-construction shear connector 180 capable of moving the fastening position.

In addition, in the arcuate prestressed concrete girder, a widening portion 190 is formed at the point of the abdomen 120 for continuation with the neighboring arched prestressed concrete girder, and a steel rod mounting hole is formed in the widened portion. In each of the steel bar anchoring holes 191, a steel bar penetrating the abdomen of the adjacent point portion of the adjacent arcuate prestressed concrete girder 100 is fixed in tension, so that the arched prestressed concrete girder can be serialized.

In addition, the post-construction shear connector 180 is inserted through the shear pocket after seating the precast bottom plate with shear pockets disposed for the bottom plate formation on the upper surface of the arched prestressed concrete girder to insert the arched prestressed concrete girder After binding to the longitudinal anchor reinforcing bar 170 of (100), it includes fastening after moving the position. The post-construction shear connection material is included in the arched prestressed concrete girder configuration, and is a precast floor plate disposed to form a floor plate on the upper surface of the arched prestressed concrete girder, in detail, a precast floor plate having a shear pocket formed in the arcuate shape. After being seated on the upper surface of the prestressed concrete girder 100, the post-construction shear connector 180 is inserted through the shear pocket to support the upper or lower surface of the longitudinal anchor reinforcement of the arched prestressed concrete girder, and the shear pocket After moving to an appropriate position within the region, the position can be determined by fastening with the longitudinal anchor reinforcing bar 170 through welding or the like.

In addition, the post-construction shear connector includes one or more being formed in a reverse 'w' shape, which is compared to the conventional stud-shaped shear connector, by selecting a reverse 'w'-shaped loop-type arch-shaped prestressed concrete girder Secure the reliability of the shear force support performance of the post-construction shear connector supported from the block-out space of the precast floor plate to the inner space of the shear pocket of the precast floor plate By increasing, it is possible to improve the bonding force between the arch-shaped prestressed concrete girder and the precast bottom plate on which the shear pocket is formed. In addition, the reverse 'w'-shaped post-construction shear connector can be post-constructed, so that a plurality of shear connectors are installed in one shear pocket, so that it is possible to easily secure improvement in shear force.

The post-construction shear connector 180 may be made of steel, and may be made of FRP (Fiber Reinforcement Polymer) or MC Nylon (Mono Cast Nylon) to prevent damage due to corrosion, UHMWPE, polyamide (PA6) , may be made of engineering plastic materials such as polyethylene (PE).

Next, in the manufacturing method for manufacturing the arch-shaped prestressed concrete girder 100 capable of combining post-construction shear connectors, the steps of flattening the installation position of the formwork structure and forming a formwork support vent at the installation position of the formwork structure and forming a floor formwork that is supported on the formwork support vent and has an upward curvature, and coupling the end formwork with a first sheath pipe 140 through holes on both sides of the floor formwork and Disposing a reinforcing bar and a first sheath pipe in an area between the end formwork plate and the bottom formwork plate, forming an abdominal formwork plate on both sides of the end formwork plate, and a part of the upper surface of the formwork structure after the abdominal formwork plate forming step Forming a block-out part formwork plate for forming a block-out in the longitudinal direction in the region and connected to the upper end of the reinforcing bar after the block-out part forming step, penetrating the lateral inner surface of the block-out part formwork The steps of installing lateral anchor reinforcing bars to expose the It includes the step of fastening the longitudinal anchor reinforcement in the longitudinal direction to the anchor reinforcement.

In addition, the first sheath pipe further includes being disposed with a curvature in the same direction as the bottom formwork forming an upward curvature. Accordingly, the first sheath pipe through-hole formed in the end formwork plate is formed at a lower position than the uppermost end of the first sheath pipe.

As a manufacturing method for manufacturing an arch-shaped prestressed concrete girder that can be combined with a post-construction shear connector, first, the installation position of the formwork structure is formed flat. This is due to the girder manufacturing environment, and when forming a production site for manufacturing the arch-shaped prestressed concrete girder 100 at construction sites such as bridges on land or on the shore or offshore, as well as in factory manufacturing, the support vent, which is the most basic, is stably installed. to install

Thereafter, to form a formwork support vent for supporting the formwork structure at the above position, the formwork support vent is installed with the same curvature to match the curvature shape of the floor formwork plate having an upward curvature formed on the upper portion of the formwork support vent.

Thereafter, a floor formwork plate is formed on the upper part, and end formwork plates are erected on both sides of the floor formwork plate and arranged, but it can be formed by punching a through hole through which the first sheath pipe passes, and in some cases, the first sheath pipe penetrates The second, third... An nth sheath pipe through hole may be formed. The reinforcing bar and the first sheath pipe are arranged in the region between the end formwork plate and the bottom formwork formed in this way, and the abdominal formwork is formed on both sides of the end formwork plate so as to come into contact with the end formwork plate and the floor formwork plate. After forming the abdominal formwork, a block-out part formwork is formed in order to form a blockout in a recessed shape by closing a partial area in the longitudinal direction on the upper surface of the formwork structure. After the formation of the block-out part formwork plate, a plurality of lateral anchor bars are connected to the upper end of the reinforcing bars reinforced in the formwork structure at regular intervals in the lateral direction, and the block-out part formwork plate passes through the inner side in the transverse direction. Install transverse anchor reinforcing bars to be exposed. Thereafter, concrete is poured into the formwork structure through the space outside the area partially closed by the block-out part formwork plate of the upper surface of the formwork structure and cured. After the curing process, the entire formwork structure is demolded and the method of manufacturing an arched prestressed concrete girder that can be combined with a post-construction shear connector is completed by fastening the longitudinal anchor reinforcement to the transverse anchor reinforcement exposed at the top. .

In addition, in the step of disposing the first sheath pipe, the first sheath pipe through-hole formed in the end formwork plate by disposing the first sheath pipe at the same curvature in the same direction as the bottom formwork forming the upward curvature is the first sheath It includes forming at a position lower than the top of the tube.

Br: bridge structure
100: arched prestressed concrete girder
110: arched lower flange
120: abdomen
130: upper flange
140: first sheath tube 141: first tension member
142: first anchorage
150: block out part
160: transverse anchor reinforcement
170: longitudinal anchor reinforcement
180: Post-construction shear connector
190: widened part 191: steel rod anchorage

Claims (4)

In the arched prestressed concrete girder that can be combined with a post-construction shear connector,
An arcuate lower flange forming an upward curvature based on the longitudinal direction; and an abdomen extending upward from the arcuate lower flange to stand up; and an upper flange at the upper end of the abdomen;
A first sheath pipe having an upward curvature in the longitudinal direction is provided inside the arched prestressed concrete girder, and a first tension member is inserted into the first sheath pipe to insert first anchorages at both ends of the arched prestressed concrete girder. ; Doedoe, the first anchoring hole is formed at a position lower than the uppermost end of the first sheath pipe;
A block-out portion recessed in the longitudinal direction in the center of the upper surface is formed on the upper flange, and the block-out portion is formed in the shape of a downward beam based on the longitudinal cross-section of the arcuate prestressed concrete girder;
On both sides of the inner surface of the block-out part, the transverse anchor reinforcement is formed in a protruding form by being partially buried and partially exposed when the arched prestressed concrete girder is formed by being spaced apart from each other in the transverse direction to the internal reinforcement of the arched prestressed concrete girder. including;
A longitudinal anchor reinforcing bar fastened in the longitudinal direction to the protruding transverse anchor reinforcing bar; is provided,
Doedoe supported by the longitudinal anchor reinforcing bar, a post-construction shear connector capable of moving the fastening position with the longitudinal anchor reinforcing bar; is formed,
An arc-shaped prestressed concrete girder capable of combining post-construction shear connectors comprising a; is formed at the point of the abdomen; .
The method according to claim 1,
The post-construction shear connector is an arch-shaped prestressed concrete girder capable of combining the post-construction shear connector comprising being formed in one or more reverse 'w' shapes.
The method according to claim 1,
The post-construction shear connecting material is polyamide; arch-shaped prestressed concrete girder capable of combining post-construction shear connecting materials, including those made of.
The method according to claim 1,
A post-construction shear connector capable of combining a post-construction shear connector comprising fixing; a steel bar passing through the abdomen of the point of the adjacent arch-shaped prestressed concrete girder adjacent to the steel bar anchorage.

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