KR102663345B1 - Full-depth precast deck panel using joint stiffeners and construction method of the precast deck panel - Google Patents

Abstract

The present invention relates to a shear surface precast floor plate and a construction method thereof. More specifically, the present invention relates to a shear surface precast floor plate and a construction method thereof. More specifically, a plurality of precast floor plates are placed in a shear pocket along the longitudinal direction of the upper girder so that the horizontal shear reinforcement on the upper surface of the upper girder is located. mounting step; Installing a connecting material in the inner space formed by the connecting reinforcing material of each of the precast floor plates facing each other; and a step of applying mortar to the inner space and the shear pocket.

Description

Precast deck panel using joint stiffeners and construction method of the precast deck panel {Full-depth precast deck panel using joint stiffeners and construction method of the precast deck panel}

The present invention relates to a precast floor plate using joint reinforcement and a method of constructing the precast floor plate.

In the case of precast concrete decks in the field of bridge technology, precast concrete decks pre-manufactured in a factory are installed on top of concrete girders or steel girders and are integrated with shear connectors to form a bridge.

Regarding the conventional precast concrete floor module, Patent Application No. 2006-0063203, 'Precast concrete floor module with reinforced loop rebar joint structure, joint structure, and precast concrete floor plate with the same' has been proposed. .

Precast concrete floor modules are assembled and connected to each other to form a precast concrete floor, and protrusions are formed at the bottom of both ends of the floor module, and when adjacent floor modules face each other, a concave filling is formed. A half-shaped concave is formed on the upper part of the protrusion, and loop reinforcing bars are placed inside the floor plate module so that the ends of the loop-shaped reinforcing bars are exposed in the concave, and the lower part of the loop reinforcing bars is a reinforcement reinforcing the protrusion. It is embedded in the protrusion to function as a roof reinforcement bar, and the upper part of the loop reinforcement bar is exposed to the concave portion. At the position between the loop reinforcement bars, when the neighboring floor modules face each other, the reinforcement ends of the loop reinforcement bars provided in the neighboring floor plate modules are exposed to the concave portion. It is a precast concrete floor plate module in which a concave step is formed on the upper surface of the protrusion so that the ends of the loop reinforcing bars on both sides overlap each other in the concave part.

The conventional precast concrete deck module constructed in this way is placed on the upper part of the bridge girder, installs the deck modules in alignment, installs molds on both sides, and finishes them with filler (concrete pouring, mortar) to form a structure on both sides. It is a structure that is assembled by connecting the floor plate modules as one piece.

However, in the conventional precast concrete floor module, a protrusion is formed at the bottom of the concave portion where the loop reinforcing bar protrudes, and the lower part of the loop reinforcing bar is embedded in a form that matches the upper surface of the protrusion. Therefore, in the protrusion, a step is formed so that the loop reinforcement of the neighboring floor plate module can be placed in the area where there is no loop reinforcement. In other words, the protrusion has a structure in which protrusions and steps in which the lower part of the loop reinforcing bar is embedded are formed alternately.

Therefore, the lower upper surface of the loop rebar is buried in a consistent manner to form a protrusion, and a step is formed between the protrusions, making it very vulnerable to impact. This has the disadvantage of being highly susceptible to damage and breakage during transportation or installation. .

In addition, the space of the joint using loop rebar, that is, the filling area, must be filled with filler material (e.g., concrete pouring) for finishing. For this, formwork must be installed on both sides, and workers' work safety is ensured due to formwork installation and removal. This causes problems such as increased costs and longer construction periods.

In addition, as the cover thickness regulations for reinforcing bars have been strengthened, it is difficult to secure the design standard (inner diameter) of loop reinforcing bars within the limited slab thickness (240 mm), so small diameter reinforcing bars are placed closely (in the longitudinal direction of the negative moment section at continuous points). rebar). Therefore, considering manufacturing and construction errors, there is a problem in the application of precast floor plates (PC panels) at continuous points of long-span bridges.

Therefore, the development of a new method that can satisfy the connection performance of the existing method was required.

Republic of Korea registered patent 10-1207786 Republic of Korea registered patent 10-1584070 Republic of Korea registered patent 10-2462488 Republic of Korea registered patent 10-0323825

Therefore, the present invention was devised to solve the above-described conventional problems. According to an embodiment of the present invention, a connecting material is installed in the inner space of the connecting section reinforcing material and the connecting section reinforcing material opposing each other with a gap between the precast floor plate. The purpose is to provide a precast floor plate using a joint reinforcement material and a construction method for the precast floor plate that can satisfy the performance of the connection between precast floor plates even within the limited slab thickness (240 mm) after mortar construction. there is.

Meanwhile, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly apparent to those skilled in the art from the description below. It will be understandable.

The first object of the present invention is a precast floor plate that is mounted along the longitudinal direction on the upper part of a girder and integrated, comprising: a main body made of a concrete floor plate; A plurality of shear pockets provided in the main body where horizontal shear reinforcement bars of the upper part of the girder are located when mounted on the upper part of the girder; and a connection reinforcement material embedded in at least one of the front and rear surfaces of the main body at specific intervals along the transverse direction.

It may further include a PC panel backup material installed on both ends of the front or rear surface of the main body to prevent the mortar used for connection between precast floor plates from leaking to the outside.

In addition, the connection reinforcement member may be characterized in that its upper surface and the connection side exposed to the main body are open, and are positioned opposite to each other at the connection section between the precast floor plates.

In addition, the connection reinforcement member may be characterized as having a longitudinal connection end that is embedded so that the open portion is exposed to the side of the connection part, and a transverse connection end that is connected to and embedded in the longitudinal connection end.

In addition, a plurality of fixing members embedded in the main body may be formed at the transverse connection end of the connection reinforcement member.

In addition, the transverse connection end of the connection reinforcement may be characterized in that it has a reinforcement reinforcement connection end connected to the reinforcement reinforcement placed in the precast floor plate.

The second object of the present invention is a method of constructing a precast floor plate mounted along the longitudinal direction on the upper girder, wherein the precast floor plate according to the first object mentioned above is placed in a shear pocket along the longitudinal direction of the upper girder. Mounting the horizontal shear reinforcement on the upper surface of the upper girder so that it is located; Installing a connecting material in the inner space formed by the connecting reinforcing material of each of the precast floor plates facing each other; and applying mortar to the inner space and the shear pocket.

Before mounting the precast floor plate, the method may further include mounting an upper girder on the lower structure and installing backup materials along the longitudinal direction at both ends of the upper girder.

In addition, the connecting member has a web portion located in a longitudinal space formed by the longitudinal connecting ends of a pair of opposing connecting portion reinforcements, and a flange portion connected to each of the front and rear of the web portion and located at each of the transverse connecting ends. , or it may be characterized in that it includes a pair of plates and a coupling means for coupling the pair of plates to keep them spaced apart from each other.

And the side of the web portion may be characterized by having holes and protrusions.

In addition, the step of constructing the mortar includes constructing a non-shrinking mortar in the inner space to connect the precast floor plate, and constructing a non-shrinking mortar in the shear pocket to synthesize the precast floor plate and the upper girder. It can be characterized.

And when applying the cross slope, the left and right backup materials of the upper girder are installed at different heights, the precast floor plate includes a pipe member with a thread formed on the inner surface, and a pipe member protrudes from the lower surface of the precast floor plate at the bottom of the pipe member. An embedding device having a gap adjusting material exposed as much as possible is installed, and in the step of mounting the precast floor plate, a lifting device is screwed to the embedding device to mount the precast floor plate, and then the lifting device is removed. , a height adjustment device with threads formed on the outer surface may be installed in the embedding device to adjust the height of the precast floor plate, and may be removed after the mortar is installed.

According to the precast floor plate using the connection reinforcement material and the construction method of the precast floor plate according to an embodiment of the present invention, the connection material is installed in the inner space of the connection reinforcement material facing each other with a gap between the connection reinforcement material and the precast floor plate. After that, mortar construction is performed, which has the effect of satisfying the performance of the connection between precast floor plates even within the limited slab thickness (240 mm).

Meanwhile, the effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical idea of the present invention along with the detailed description of the invention, so the present invention is limited only to the matters described in such drawings. It should not be interpreted as such.
Figure 1 is a flow chart of a construction method of a full-section precast floor plate using a connection reinforcement material according to an embodiment of the present invention;
Figure 2 is a perspective view of the upper girder mounted on the lower structure according to an embodiment of the present invention;
Figure 3a is a perspective view of a precast floor plate (hereinafter referred to as PC panel) mounted on the upper girder in Figure 2;
Figure 3b is a perspective view of connection reinforcement members in opposite positions according to an embodiment of the present invention;
Figure 4a is a perspective view of a state in which the connecting material in Figure 3a is installed;
Figure 4b is an exploded perspective view of the connection reinforcement and connection material in Figure 3b;
Figure 5 is a perspective view of a state in which non-shrink mortar is installed on the connection portion and shear pocket in Figure 4a;
Figure 6a is a perspective view of the connection reinforcement material into which the connection material is inserted according to the first embodiment of the present invention;
Figure 6b is a perspective view of the connection reinforcement material into which the connection material is inserted according to the second embodiment of the present invention;
Figure 6c is a perspective view of the connection reinforcement material into which the connection material is inserted according to the third embodiment of the present invention;
Figure 6d is a perspective view of the connection reinforcement member into which the connection member is inserted according to the fourth embodiment of the present invention;
Figure 6e is a perspective view of the connection reinforcement material into which the connection material is inserted according to the fifth embodiment of the present invention;
Figure 7a is a perspective view of a connecting material according to the first embodiment of the present invention;
Figure 7b is a perspective view of a connecting material according to a second embodiment of the present invention;
Figure 8a is a perspective view of the connection reinforcement material into which the connection material is inserted according to the first embodiment of the present invention;
Figure 8b is a longitudinal cross-sectional view of the PC panel connection part according to the first embodiment of the present invention;
Figure 8c is a plan view of the PC panel connection part according to the first embodiment of the present invention;
Figure 9a is a perspective view of the connection reinforcement material into which the connection material is inserted according to the second embodiment of the present invention;
Figure 9b is a longitudinal cross-sectional view of the PC panel connection part according to the second embodiment of the present invention;
Figure 9c is a plan view of the PC panel connection part according to the second embodiment of the present invention;
Figure 10a is a perspective view of the connection reinforcement material into which the connection material is inserted according to the third embodiment of the present invention;
Figure 10b is a longitudinal cross-sectional view of the PC panel connection part according to the third embodiment of the present invention;
Figure 10c is a plan view of the PC panel connection part according to the third embodiment of the present invention;
Figure 11a is a perspective view of the connection reinforcement material into which the connection material is inserted according to the fourth embodiment of the present invention;
Figure 11b is a longitudinal cross-sectional view of the PC panel connection part according to the fourth embodiment of the present invention;
Figure 11c is a plan view of the PC panel connection part according to the fourth embodiment of the present invention;
Figure 12a is a perspective view of the connection reinforcement material into which the connection material is inserted according to the fifth embodiment of the present invention;
Figure 12b is a longitudinal cross-sectional view of the PC panel connection part according to the fifth embodiment of the present invention;
Figure 12c is a plan view of the PC panel connection part according to the fifth embodiment of the present invention;
Figure 13 is a partial front view of the upper girder and precast floor plate for applying the cross slope of a conventional bridge;
Figure 14 is a partial front view of the upper girder and precast floor plate for bridge cross slope application according to an embodiment of the present invention;
Figure 15a is a partial front view of the lifting device installed in the buried device according to the first embodiment of the present invention;
Figure 15b shows a partial front view of the height adjustment device installed according to the first embodiment of the present invention.
Figure 16a is an exploded perspective view of the state during manufacture of the embedding device according to the first embodiment of the present invention;
Figure 16b is a perspective view of the state when lifting the embedment device according to the first embodiment of the present invention;
Figure 16c is a perspective view when the height adjustment device according to the first embodiment of the present invention is applied;
17A to 17C are perspective views of spacing adjusting materials in circular, square, and hexagonal shapes according to an embodiment of the present invention;
Figure 18a is a front view of a PC panel to which an embedded device according to the second embodiment of the present invention is applied and a state in which the embedded gap adjusting material is protruded through an adjustment tool;
Figure 18b is a front view when lifting a PC panel to which the embedding device according to the second embodiment of the present invention is applied;
Figure 18c is a front view of the height being adjusted using an adjustment tool according to the second embodiment of the present invention;
Figure 19a is an exploded perspective view of the state during manufacture of the embedding device according to the second embodiment of the present invention;
Figure 19b is a perspective view of a state in which the embedded gap adjusting member is protruded during lifting according to the second embodiment of the present invention;
Figure 19c is a perspective view when the height adjustment device according to the second embodiment of the present invention is applied;
Figure 20a is an exploded perspective view of the state during manufacture of the embedding device according to the third embodiment of the present invention;
Figure 20b is a perspective view of the state when lifting the embedment device according to the third embodiment of the present invention;
Figure 20c shows a perspective view when the height is adjusted using an adjustment tool according to the third embodiment of the present invention.

The above objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments related to the attached drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete and so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art.

In this specification, when an element is referred to as being on another element, it means that it may be formed directly on the other element or that a third element may be interposed between them. Also, in the drawings, the thickness of components is exaggerated for effective explanation of technical content.

Embodiments described herein will be explained with reference to cross-sectional views and/or plan views, which are ideal illustrations of the present invention. In the drawings, the thickness of regions is exaggerated for effective explanation of technical content. Therefore, the shape of the illustration may be changed depending on manufacturing technology and/or tolerance. Accordingly, embodiments of the present invention are not limited to the specific form shown, but also include changes in form produced according to the manufacturing process. For example, an area shown as a right angle may be rounded or have a shape with a predetermined curvature. Accordingly, the regions illustrated in the drawings have properties, and the shapes of the regions illustrated in the drawings are intended to illustrate a specific shape of the region of the device and are not intended to limit the scope of the invention. In various embodiments of the present specification, terms such as first and second are used to describe various components, but these components should not be limited by these terms. These terms are merely used to distinguish one component from another. Embodiments described and illustrated herein also include complementary embodiments thereof.

The terminology used herein is for describing embodiments and is not intended to limit the invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, 'comprises' and/or 'comprising' does not exclude the presence or addition of one or more other elements.

In describing specific embodiments below, various specific details have been written to explain the invention in more detail and to aid understanding. However, a person skilled in the art to understand the present invention can recognize that it can be used without these various specific details. In some cases, it is mentioned in advance that when describing the invention, parts that are commonly known but are not significantly related to the invention are not described in order to prevent confusion without any reason in explaining the invention.

Hereinafter, the configuration, function, and construction method of a full-section precast floor plate (hereinafter referred to as PC panel) using a joint reinforcement material according to an embodiment of the present invention will be described.

Figure 1 shows a flowchart of a construction method of a full-section precast floor plate using connection reinforcement according to an embodiment of the present invention.

Figure 2 shows a perspective view of the upper girder mounted on the lower structure according to an embodiment of the present invention.

As shown in Figure 2, the upper girder (1, PSC girder, steel girder, etc.) is mounted on the lower structure (abutment and pier) (S1). At this time, the girder backup material (2) is attached to the upper part of the upper girder to prevent the non-shrinking mortar, which is constructed for combining the PC panel (10) and the upper girder (1), from leaking to the outside. In addition, the horizontal shear reinforcement (3) is installed when manufacturing the upper girder (1) or installed after mounting the girder (1) or after mounting the PC panel to synthesize the PC panel (10) and the upper girder (1). In addition, the horizontal shear reinforcement (3) is constructed to match the position of the shear pocket (11) formed inside the PC panel (10).

Then, the PC panel (10) is mounted so that the horizontal shear reinforcement (3) on the upper surface of the upper girder (1) is located within the shear pocket (11) along the longitudinal direction of the upper girder (1) (S2).

Figure 3a shows a perspective view of a precast floor plate (hereinafter referred to as a PC panel) mounted on the upper girder in Figure 2. And Figure 3b shows a perspective view of connection reinforcement members at opposite positions according to an embodiment of the present invention.

The PC panel (10) is provided with a main body portion and a plurality of shear pockets (11) where the horizontal shear reinforcement (3) on the upper part of the girder (1) is located when mounted on the upper part of the girder (1), It may be configured to include connection reinforcement members 20 that are embedded in at least one of the front and rear surfaces of the main body at specific intervals along the transverse direction.

In addition, PC panel backup material 12 is installed on both ends of the front or rear surface of the PC panel 10 to prevent the mortar used for connection between the PC panels 10 from leaking to the outside.

In addition, the connection reinforcement material 20 has an open top surface and a connection side exposed from the PC panel 10, and is positioned opposite to each other at the connection section between the PC panels 10.

The connection reinforcement material 20 according to this embodiment of the present invention includes a longitudinal connection end 21 that is embedded so that the open portion is exposed to the connection side, and a transverse connection end that is connected to and embedded in the longitudinal connection end 21. (22). In addition, the transverse connecting end 22 of the connection reinforcement 20 may be provided with a reinforcing bar connecting end 24 connected to the reinforcing bar 6 of the PC panel, or a plurality of reinforcement bars embedded in the PC panel 10. A fixing member 23 may be formed. This anchoring member 23 may be made of stud bolt or I-type steel.

Then, the connecting material 30 is installed in the inner space formed by the connecting section reinforcing materials 20 of each of the PC panels 10 facing each other (S3). Figure 4a shows a perspective view of a state in which the connecting material in Figure 3a is installed. And Figure 4b shows an exploded perspective view of the connection reinforcement and connection material in Figure 3b.

That is, a connecting material 30 is installed to connect the PC panels 10. The connecting member 30 is formed with protrusions 34 and holes 33 to ensure attachment performance, and is installed in the inner space connecting a pair of connecting reinforcement members 20.

Specifically, the connecting member 30 according to an embodiment of the present invention includes a web portion 31 located in the longitudinal space formed by the longitudinal connecting end 21 of a pair of opposing connecting reinforcement members 20, and this The web portion 31 has a flange portion 32 connected to each of the front and rear ends and positioned at each of the transverse connecting ends 22. In addition, a plurality of holes 33 and protrusions 34 are formed in the web portion 31 to strengthen the bonding force during mortaring.

Then, mortar 40 is applied to the inner space and the shear pocket 11 (S4). FIG. 5 shows a perspective view of a state in which non-shrinkage mortar is applied to the connection portion and the shear pocket 11 in FIG. 4A.

To connect the PC panels 10, non-shrink mortar 40 is installed in the inner space provided by the connection reinforcement material 20. At this time, the non-shrink mortar 40 applied by the PC panel backup material 12 does not leak to the outside. And to synthesize the PC panel 10 and the upper girder 1, non-shrink mortar 40 is installed in the shear pocket 11. At this time, the non-shrinking mortar 40, which is constructed to composite the PC panel 10 and the upper girder 1, does not leak to the outside due to the girder backup material 2.

Figures 6a to 6e show perspective views of the connection reinforcement material into which the connection material is inserted according to the first to fifth embodiments of the present invention.

And Figures 7a and 7b show perspective views of connecting materials according to the first and second embodiments of the present invention.

As shown in Figure 7a, the connecting material according to the first embodiment of the present invention, as mentioned above, includes a web portion 31 and a flange portion 32, a hole 33 formed in the web portion 31, and a protrusion. It can be seen that it can be composed including (34). As shown in Figure 7b, the connecting material 30 according to the second embodiment of the present invention may be configured in a form in which a pair of plates 35 are coupled with bolts 36 and nuts 37 to be spaced apart from each other. can be seen.

Figure 8a shows a perspective view of the connection reinforcement member into which the connection material is inserted according to the first embodiment of the present invention. And Figure 8b shows a vertical cross-sectional view of the PC panel connection part according to the first embodiment of the present invention, and Figure 8c shows a plan view of the PC panel connection part according to the first embodiment of the present invention. The connection reinforcement material 20 according to the first embodiment of the present invention has a reinforcement reinforcement connection end 24 on both sides of the transverse connection end 22 so that the U-shaped reinforcement reinforcement 6 of the PC panel 10 can be coupled. You can see that it is available.

In addition, Figure 9a shows a perspective view of the connection reinforcement member into which the connection member according to the second embodiment of the present invention is inserted. And Figure 9b shows a vertical cross-sectional view of the PC panel connection part according to the second embodiment of the present invention, and Figure 9c shows a plan view of the PC panel connection part according to the second embodiment of the present invention.

The connection reinforcement (20) according to the second embodiment of the present invention is located on the rear surface of the transverse connection end (22) of the connection reinforcement (20) so that the thread formed at the end of the straight reinforcement bar (6) embedded in the PC panel can be coupled. It can be seen that the load reinforcement bar connection end 24 in the form of a screw hole is provided.

Figure 10a shows a perspective view of the connection reinforcement member into which the connection member is inserted according to the third embodiment of the present invention. And Figure 10b shows a vertical cross-sectional view of the PC panel connection part according to the third embodiment of the present invention, and Figure 10c shows a plan view of the PC panel connection part according to the third embodiment of the present invention.

The connection reinforcement material 20 according to the third embodiment of the present invention may be configured with a fixing member 23 connected to the rear surface of the transverse connecting end 22, and this fixing member 23 is formed with a plurality of stud bolts. It can be seen that it can be configured.

Figure 11a shows a perspective view of the connection reinforcement member into which the connection member is inserted according to the fourth embodiment of the present invention. And Figure 11b shows a vertical cross-sectional view of the PC panel connection part according to the fourth embodiment of the present invention. Additionally, Figure 11c shows a plan view of the PC panel connection portion according to the fourth embodiment of the present invention.

The connection reinforcement member 20 according to the fourth embodiment of the present invention may be configured with an anchoring member 23 connected to the rear surface of the transverse connecting end 22, and this anchoring member 23 is made of a plurality of I-type steel materials. It can be seen that it can be configured in the form.

Figure 12a shows a perspective view of the connection reinforcement member into which the connection member according to the fifth embodiment of the present invention is inserted. And Figure 12b shows a vertical cross-sectional view of the PC panel connection part according to the fifth embodiment of the present invention. Figure 12c shows a plan view of the PC panel connection part according to the fifth embodiment of the present invention. It can be seen that the anchoring member 23 of the connection reinforcement 20 according to the fifth embodiment of the present invention may be configured in the form of a plurality of loop reinforcing bars.

Below, the PC panel (10) mounting and construction method will be explained when it is necessary to apply the bridge cross slope. According to an embodiment of the present invention, when a bridge cross slope is required, a PC panel 10 with an embedded device 50 is applied.

Figure 13 shows a partial front view of the upper girder and precast deck for application to the cross slope of a conventional bridge.

As shown in FIG. 13, the formation of a haunch portion 5 is necessary when manufacturing the PC panel 10 to apply the cross slope of a bridge. There is a disadvantage in that the manufacturability of the PC panel (10) and the reusability of the form are reduced due to the formation of the haunch portion (5), which is highly variable depending on site conditions. In order to form a bedding layer, the spacer (24) is used before mounting the PC panel (10). must be additionally installed, and there is a problem in that it is difficult to recycle the height adjustment device after use.

And Figure 14 shows a partial front view of the upper girder and precast floor plate for bridge cross slope application according to an embodiment of the present invention. In an embodiment of the present invention, in order to apply the cross slope of a bridge, the haunch portion (5) is excluded when manufacturing the PC panel (10) and an embedded device (50) that can be used for lifting, height adjustment, and spacing material (24) is applied. , PC panel (10) has excellent manufacturability and reusability. In addition, the height adjustment device 60 has excellent reusability because it penetrates the embedded device spacing adjustment material 53.

Figure 15a shows a partial front view of the lifting device installed in the buried device according to the first embodiment of the present invention. Figure 15b shows a partial front view of the height adjustment device installed according to the first embodiment of the present invention.

As shown in Figures 15a and 15b, unlike the prior art, the thickness of the PC panel 10 is manufactured uniformly without considering the cross slope of the bridge, and an embedding device 50 is installed inside when manufacturing the PC panel 10. Able to know. This embedding device 50 is embedded through the PC panel 10 and has a pipe member 51 with a thread formed on the inner surface, and a protruding spacing adjusting member 53 that is exposed to protrude from the lower surface of the PC panel 10. . The pipe member 51 embedded during manufacturing may be reinforced with reinforcing bars 52 to increase the bonding force with the floor plate.

Therefore, when mounting, as shown in Figure 15a, the lifting device 4 is screwed to the embedding device 50 to lift and mount the PC panel 10. At this time, the spacer 24 can be excluded, and a protruding spacer 53 is installed at the bottom of the embedding device 50 to secure the minimum thickness. Also, considering the cross-slope of the bridge, backup materials with different heights on the left and right sides can be placed.

As shown in Figure 15b, after removing the lifting device 4, the height adjustment device 60 with a thread formed on the outer surface is installed on the embedding device 50 to adjust the height of the PC panel 10, and the mortar (40) It can be easily removed after construction and has excellent reusability.

In other words, the cross-slope of the bridge is naturally maintained by the protruding spacing control material 53, forming the haunch portion 5 and bedding layer of the girder 1, and the difference in the rise amount of the girder 1 (bridge or construction error) is maintained naturally. etc.), a support point is formed using the height adjustment device 60, and after construction of the non-shrink mortar 40 inside the bedding layer, the height adjustment device 60 can be easily removed (protruding gap adjustment material 53 ) thread protection).

Figure 16a shows an exploded perspective view of the state during manufacture of the embedding device according to the first embodiment of the present invention. And Figure 16b shows a perspective view of the state of the burial device according to the first embodiment of the present invention when it is lifted. In addition, Figure 16c shows a perspective view when the height adjustment device according to the first embodiment of the present invention is applied. In addition, Figures 17a to 17c show perspective views of spacing adjusting materials in circular, square, and hexagonal shapes according to an embodiment of the present invention.

As shown in Figure 16a, a pipe member 51 having a thread formed on the inner surface and a protruding spacing adjusting member 53 coupled to the lower end of the pipe member 51 are embedded and manufactured. At this time, the protruding spacing adjusting member 53 may be provided with a threaded hole and configured to be screwed together through a thread formed on the lower outer surface of the pipe member 51.

It can be seen that the protruding spacing adjusting member 53 and the embedded spacing adjusting member 54, which will be described later, may have a circular, square, or hexagonal cross-section, as shown in FIGS. 17A to 17C.

And as shown in Figure 16b, it can be seen that the lifting device 4 can be screwed to the top of the pipe member 51 when lifting and mounting the PC panel 10. In addition, in the first embodiment of the present invention, the degree of protrusion of the protruding spacing adjusting member 53 can be adjusted before mounting in consideration of the transverse inclination, and then mounting can be performed.

And as shown in Figure 16c, after mounting, if height adjustment is necessary, the height is finally adjusted through the bolt-type height adjustment device 60. Also, after constructing the mortar 40, the height adjustment device 60 can be removed and reused.

Figure 18a shows a front view of a PC panel to which an embedded device according to the second embodiment of the present invention is applied and a state in which an embedded gap adjusting material is protruded through an adjustment tool. And Figure 18b shows a front view when lifting the PC panel to which the embedding device according to the second embodiment of the present invention is applied. Additionally, Figure 18c shows a front view of the height being adjusted using an adjustment tool according to the second embodiment of the present invention.

The PC panel 10 having an embedded device according to the second and third embodiments of the present invention is manufactured in a form in which the gap adjusting material is embedded without protruding during manufacturing.

Figure 19a shows an exploded perspective view of the state during manufacture of the embedding device according to the second embodiment of the present invention. And Figure 19b is a perspective view of the embedded device in a lifting state according to the second embodiment of the present invention, and Figure 19c is a perspective view of the height adjustment through the adjustment tool according to the second embodiment of the present invention.

In the second and third embodiments of the present invention, unlike the first embodiment mentioned above, a separate height adjustment device is not required, and the height can be adjusted to an appropriate position to suit the cross slope.

As shown in FIGS. 18A and 19A, when manufacturing the PC panel 10, the pipe member 51 and the embedded spacing adjusting material 54 are both manufactured with them embedded inside. The pipe member 51 has a thread formed on its inner surface, and the embedded gap adjuster 54 has an upper bolt portion 55 formed at the center of the upper end, so that the upper bolt portion 55 is screwed to the pipe member 51. It is manufactured by being embedded in the PC panel (10) in a combined state. Additionally, a tool insertion groove 56 is formed on the upper surface of the upper bolt portion 55.

And after transporting the manufactured PC panel 10 to the site, the protrusion height of the embedded gap adjusting material 54 can be adjusted using the adjustment tool 8 to match the cross slope. That is, after inserting the insertion end of the lower end of the adjustment tool (8) into the tool insertion groove (56) on the upper surface of the upper bolt part (55) of the embedded spacing adjusting material (54), loosening and tightening the screw The protrusion height of the gap adjusting material 54 can be adjusted.

And as shown in FIGS. 18B and 19B, it can be seen that the lifting device 4 is coupled to the pipe member 51, lifted and placed, and then the lifting device 4 is removed. In addition, if it is necessary to adjust the height after mounting the PC panel (10), the protrusion height of the embedded gap adjuster (54) can be additionally adjusted using the adjustment tool (8) without using a separate height adjustment device. there is.

Figure 20a shows an exploded perspective view of the state during manufacture of the embedding device according to the third embodiment of the present invention. And Figure 20b shows a perspective view of the embedded gap adjusting member 54 protruding during lifting according to the third embodiment of the present invention. In addition, Figure 20c shows a perspective view when the height adjustment device 60 according to the third embodiment of the present invention is applied.

The third embodiment of the present invention is also an embedded type, and both the pipe member 51 and the embedded spacing adjusting material 54 are embedded when manufacturing the PC panel 10. The embedded gap adjuster 54 according to the third embodiment of the present invention does not have an upper bolt portion, and is provided with an adjustment hole 57 having a thread formed on the inner surface. Then, a thread is formed on the lower outer surface of the pipe member 51, and the outer thread of the pipe member 51 and the embedded spacing adjusting material 54 are screwed together to produce the PC panel 10.

And a tool insertion groove 56 is provided on the lower surface of the embedded gap adjuster 54 according to the third embodiment of the present invention.

After transporting the manufactured PC panel 10, the protrusion height of the embedded gap adjusting member 54 can be adjusted using the adjustment tool 8 to match the transverse slope. That is, after inserting the insertion end of the adjustment tool (8) into the tool insertion groove (56) on the lower surface of the embedded spacing adjusting member (54), the embedded spacing adjusting member (54) protrudes through loosening and tightening the screw. Height can be adjusted.

And as shown in Figure 20b, it can be seen that the lifting device 4 is coupled to the pipe member 51, lifted and placed, and then the lifting device is removed. And if it is necessary to adjust the height after mounting the PC panel (10), the height can be adjusted using a separate height adjustment device (60).

In addition, the apparatus and method described above are not limited to the configuration and method of the above-described embodiments, but all or part of each embodiment can be selectively combined so that various modifications can be made. It may be composed.

1:Upper girder
2: Backup material
3:Horizontal shear rebar
4: Lifting device
5: Haunch part
6: Strength rebar
8:Adjustment tool
10: Full-section precast floor plate (PC panel)
11: Front pocket
12:PC panel backup material
20: Connection reinforcement
21: longitudinal connection end
22: Transverse connecting end
23:Fixing member
24: Strength rebar connection end
30: Connecting material
31:Web Department
32:Flan branch
33:Hall
34:Protrusion
35:Plate
36:bolt
37:Nut
40: Mortar
50: Purchase device
51: Pipe member
52:Reinforcement bar
53: Protruding spacing adjusting material
54: Embedded gap adjuster
55: Top bolt part
56: Tool insertion groove
57: Control hole
60: Height adjustment device

Claims (12)

A precast floor plate that is mounted along the longitudinal direction on the top of the girder and integrated,
Main body made of concrete floor plate; A plurality of shear pockets provided in the main body where horizontal shear reinforcement bars of the upper part of the girder are located when mounted on the upper part of the girder; And a connection reinforcement member embedded in at least one of the front and rear surfaces of the main body at specific intervals along the transverse direction.
The connection reinforcement member has an upper end surface and a connection side exposed to the main body that are open, are located opposite to each other at the connection between the precast floor plates, and include a longitudinal connection end embedded so that the open portion is exposed to the connection side, It has a transverse connecting end connected to and embedded in the longitudinal connecting end,
A plurality of anchoring members embedded in the main body are formed at the transverse connection end of the connection reinforcement, and a reinforcement reinforcement connection end connected to the reinforcement reinforcement placed on the precast floor plate is formed at the transverse connection end of the connection reinforcement. have,
A connecting material is installed in the inner space formed by the connecting reinforcing material of each of the precast floor plates facing each other,
The connecting material is,
It has a web portion located in a longitudinal space formed by the longitudinal connecting ends of a pair of opposing connection reinforcement members, a flange portion connected to each of the front and rear of the web portion and located at each of the transverse connecting ends, and a hole on a side of the web portion. and has protrusions,
When applying a cross slope, the left and right backup materials of the upper girder are installed at different heights, and the precast floor plate includes a pipe member with a thread formed on the inner surface, and a pipe member protrudes or is embedded in the lower surface of the precast floor plate at the bottom of the pipe member. An embedded device having a gap adjusting material is installed,
After screwing the lifting device to the top of the pipe member and controlling the screw connection of the spacing adjusting material to primarily control the protrusion height, mounting the precast floor plate, and removing the lifting device, if height adjustment is necessary A full-section precast floor plate, characterized in that the height of the precast floor plate is finally adjusted by installing it on the embedding device through a height adjustment device with threads formed on the outer surface, and is removed after mortar construction.
According to clause 1,
A full-face precast floor plate further comprising a PC panel backup material installed on both ends of the front or rear surface of the main body to prevent the mortar used for connection between precast floor plates from leaking to the outside.
delete delete delete delete A method of constructing a precast floor plate mounted along the longitudinal direction on the upper girder,
Mounting the precast floor plate according to claim 1 or 2 in a shear pocket along the longitudinal direction of the upper girder so that the horizontal shear reinforcement on the upper surface of the upper girder is located;
Installing a connecting material in the inner space formed by the connecting reinforcing material of each of the precast floor plates facing each other; and
A method of constructing a shear-section precast floor plate, comprising the step of applying mortar to the inner space and the shear pocket.
According to clause 7,
Before mounting the precast floor plate,
A method of constructing a full-section precast floor plate further comprising the step of mounting an upper girder on the lower structure and installing backup materials along the longitudinal direction at both ends of the upper girder.
According to clause 7,
The connecting material is,
A shear section characterized by having a web portion located in a longitudinal space formed by the longitudinal connecting ends of a pair of opposing connection stiffeners, and a flange portion connected to each of the front and rear of the web portion and located at each of the transverse connecting ends. Construction method of precast floor plate.
According to clause 9,
A construction method of a full-section precast floor plate, characterized in that the web portion has a hole and a protrusion on the side.
According to clause 7,
The mortar construction step is,
A precast floor on the front side, characterized in that non-shrink mortar is constructed in the inner space to connect the precast floor plate, and non-shrink mortar is constructed in the shear pocket for synthesis of the precast floor plate and the upper girder. Construction method of the plate.
According to clause 8,
When applying a cross slope, the left and right backup materials of the upper girder are installed at different heights,
The precast floor plate is provided with an embedded device having a pipe member having a thread formed on an inner surface, and a gap adjusting material exposed at the bottom of the pipe member to protrude from the lower surface of the precast floor plate,
In the step of mounting the precast floor plate,
A lifting device is screwed to the embedding device to mount the precast floor plate, and after removing the lifting device, a height adjustment device with threads formed on the outer surface is installed in the embedding device to adjust the height of the precast floor plate. A method of constructing a full-section precast floor plate, characterized in that the mortar is removed after construction.

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