Precast concrete panel capable of shear reinforcement at the bottom of the Dowel bar and packaging method using it

Abstract

The present invention relates to a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar and a paving method using the same. The invention improves pavement quality by installing precast concrete panels on a road surface for paving and supporting the dowel bar at a connection point where the dowel bar, protruding from the side of a precast concrete panel, is inserted into a pocket of an adjacent precast concrete panel. A precast concrete panel capable of shear reinforcement at the bottom of a dowel bar according to the present invention comprises: a rectangular panel body (10) in a planar shape; a pocket formed on one or more sides of the panel body and a hoop reinforcing bar (40) received within the pocket; and a dowel bar (20) formed on the periphery of the panel body without the pocket. A plurality of these panels are constructed adjacent to each other so that the dowel bar is inserted into an adjacent pocket, after which the inside of the pocket is grouted and paved. A support member (50) is included to support the dowel bar from the bottom within the pocket. The support member is configured to be a fixed type or a movable type.

Description

Technology Field

[0001] The present invention relates to a precast concrete panel and a paving method for road paving, and more specifically, to a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar to secure shear force at a connection part using a dowel bar when paving with precast concrete panels, thereby improving paving quality, and a paving method using the same. Background Technology

[0002] In general, concrete paving is widely used along with asphalt paving for road construction.

[0003] Concrete pavements have a lifespan of 20 to 30 years, and as they deteriorate due to heavy traffic, cracks and other issues may occur, requiring repairs after a certain period of time.

[0004] To repair concrete pavements, work such as partial pothole repair, surface treatment, and overlaying is being carried out on cracked or sunken areas.

[0005] However, if only the damaged parts of the concrete pavement are partially repaired, secondary damage increases around the repaired parts, and for the maintenance of the concrete pavement, it is necessary to overlay the entire concrete pavement or replace the secondary damaged parts.

[0006] However, there are problems with new concrete pavements, such as the need for traffic control over an extended period because the entire surface of the concrete pavement is cut and new concrete is poured and cured, and the possibility of cracks forming between the new and existing concrete pavements and the pavement surfaces separating when new concrete is poured and cured on-site.

[0007] To solve these problems, paving technology using precast concrete panels has been proposed, and the background technology can be found in Registered Patent No. 10-2193641.

[0008] According to the prior art, as shown in FIG. 1, a dowel bar (2) is formed protruding from two of the four sides of a precast concrete panel (1), and a concave pocket (3) and a half-section hoop reinforcement (4) are formed on the remaining two sides. When adjacent precast concrete panels (1) are installed, the dowel bar (2) formed on one side of the precast concrete panel (1) is inserted into the pocket (3) of the other side of the precast concrete panel (1), and then the connection is grouted to construct the structure. However, when a shear load is applied to the connection, the shear force is insufficient, causing the dowel bar (2) to bend or deform, or damage (cracks, breakage, etc.) occurs in the precast concrete panel (1) where the dowel bar (2) protrudes, or damage occurs in the precast concrete panel (1) above the pocket (3), thereby reducing the quality of construction. That is, in the prior art, the dowel bar (2) and the hoop reinforcing bar (4) are together in the pocket (3), but these (2, 4) are not configured to interact and only the connection strength of the connection part is considered and shear strength reinforcement is not provided.

[0009] And, a dowel bar (2) protruding from a precast concrete panel (1) is inserted into a concave pocket (3) of an adjacent precast concrete panel (1) and embedded in the grouting together with a hoop reinforcing bar (4) protruding into the pocket (3), but since there is no organic bonding relationship between the dowel bar (2) and the hoop reinforcing bar (4), the pavement strength is reduced. Prior art literature

[0010] Registered Patent No. 10-2193641 The problem to be solved

[0011] The present invention aims to solve the aforementioned problems by providing a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar and a paving method using the same, wherein precast concrete panels are installed on a road surface for paving and the dowel bar protruding from the side of the precast concrete panel is supported at a connection point where the dowel bar is inserted into a pocket of an adjacent precast concrete panel. means of solving the problem

[0012] A precast concrete panel capable of shear reinforcement at the bottom of a dowel bar according to the present invention is characterized by comprising a rectangular panel body in a planar shape, a dowel bar and a pocket (hoop reinforcement) formed on the periphery of the panel body and interlocked, and a support member that supports the dowel bar from the bottom within the pocket.

[0013] Preferably, the support member is configured to move toward the dowel bar from inside the pocket.

[0014] It is characterized by including a spacer that secures the support member to the inside or outside of the pocket. Effects of the invention

[0015] According to the precast concrete panel capable of shear reinforcement at the bottom of the dowel bar and the paving method using the same according to the present invention, a dowel bar protruding to the side of a precast concrete panel is inserted into a pocket of an adjacent precast concrete panel and then connected by grouting to pave the road surface. Here, by supporting the dowel bar with a support member to secure bracing rigidity against shear load, the connection part is prevented from being damaged, and the rigidity is also increased through the support member, thereby having the effect of improving the quality of the paving using the precast concrete panel. Brief explanation of the drawing

[0016] FIG. 1 is a cross-sectional view showing the connection structure of precast concrete panels for conventional road paving. FIG. 2 is a perspective view of a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar according to Embodiment 1 of the present invention. FIG. 3 is a plan view of a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar according to Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view of the connection state of a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar according to Embodiment 1 of the present invention. FIG. 5 is a perspective view of the installation state of a support member applied to a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar according to Embodiment 1 of the present invention. FIG. 6 is a front view showing a spacer applied to a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar according to Embodiment 1 of the present invention. FIG. 7 is a paving process diagram using a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar according to Example 1 of the present invention. FIG. 8 is a paving process diagram using a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar according to Example 2 of the present invention. Specific details for implementing the invention

[0017] In the following description of the present invention, specific descriptions of related known functions or configurations will be omitted if it is determined that such descriptions would unnecessarily obscure the essence of the invention. Furthermore, the terms described below are defined in consideration of their functions within the present invention, and these definitions may vary depending on the intentions or practices of the user or operator. Therefore, such definitions should be based on the content throughout this specification.

[0018] Example 1 is characterized by a movable support member that reduces the amount of movement of the panel, and Example 2 is characterized by a fixed support member that reduces the configuration for moving the support member, thereby simplifying the structure.

[0019] <Example 1>

[0020] As shown in FIGS. 2 to 4, the precast concrete panel (100) capable of shear reinforcement at the bottom of the dowel bar according to the present embodiment includes a panel body (10), a dowel bar (20), a pocket (30), a half-section hoop reinforcement (40) formed as a connecting configuration on the periphery of the panel body (10), and a support member (50) supporting the dowel bar (20).

[0021] The panel body (10) is a precast concrete body manufactured in a factory, preferably reinforced concrete with reinforcing bars arranged inside to reinforce tensile strength, and is rectangular (rectangular, etc.) when viewed from a planar view.

[0022] The perimeter of the panel body (10) is formed on four sides, and among the four perimeters, two adjacent locations have dowel bars (20) formed and the remaining two locations have pockets (30) formed, and the hoop reinforcing bar (40) is configured to protrude inside the pockets (30).

[0023] Structurally, the dowel bar (20) is formed to protrude along the transverse direction from the side of the panel body (10), and the pocket (30) is a block-out structure that is open toward the side and bottom, and the hoop reinforcement (40) is a half-section hoop shape placed inside the pocket (30), and the top and side are embedded inside the panel body (10).

[0024] The dowel bar (20) is a length at which the ends form a gap with the inner wall of the pocket (30) when the panel bodies (10) are adjacent.

[0025] One pocket (30) may be formed lengthwise on one side of the panel body (10), or two or more may be formed with the leg portion (11) as shown in the drawing. In the latter case, since the leg portion (11) supports the support member (50), it helps to increase the support rigidity and maintain the installation position of the support member (50). The leg portion (11) is formed integrally with the panel body (10) and is a part where the bottom is supported on the road surface.

[0026] The panel body (10) may have various additional configurations, such as height adjustment means and holes for grouting, and since these additional configurations can be implemented from the prior art, a detailed description is omitted.

[0027] The support member (50) supports the dowel bar (20) inserted into the pocket (30) at its bottom.

[0028] In the packaging process according to the present invention, the dowel bar (20) of the panel body (10-1) that is installed first is inserted into the pocket (30) of the panel body (10-2) that is installed later, and in this process, the insertion of the dowel bar (20) into the pocket (30) must not be interfered with, and the bottom of the dowel bar (20) must be supported after the dowel bar (20) is inserted into the pocket (30). To this end, the support member (50) is configured to be movable, and the direction of movement of the support member (50) is from the inside of the pocket (30) to the outside.

[0029] The support member (50) supports the dowel bar (20) using the panel body (10) or the hoop reinforcement (40) as a support base, and is described by example in which the hoop reinforcement (40) is installed inside the pocket (30) and two or more pockets (30) are together with the leg portion (11).

[0030] As shown in FIG. 5, the support member (50) is installed along the leg portion (11) and the pocket (30), where the leg portion (11) is inserted into the movable hole (12) and the pocket (30) is placed on the horizontal portion (41) of the hoop reinforcing bar (40) inside the pocket (30).

[0031] The movable hole (12) is formed long along the direction of movement of the support member (50) and is formed at a height sufficient to allow the support member (50) to move, thereby preventing excessive movement of the support member (50).

[0032] The horizontal portion (41) of the hoop reinforcing bar (40) is configured with a length for the movement of the support member (50).

[0033] The support member (50) is not necessarily supported on the leg portion (11) and the horizontal portion (41) of the hoop reinforcing bar (40), and in the case where the panel body (10) does not have a leg portion (11), the support member (50) is installed to be movable using only the hoop reinforcing bar (40) as a support base.

[0034] The support member (50) is preferably made of a material and structure that increases the strength of the connection part along with the function of supporting the dowel bar (20), and preferably is a reinforcing bar or a steel rod.

[0035] In addition, to prevent the support member (50) from falling off along the longitudinal direction, for example, after inserting and installing the support member (50) into the pocket (30), nuts (caps, sockets), etc., with a cross-sectional area larger than that of the support member (50) are assembled on both sides in the longitudinal direction.

[0036] Meanwhile, considering the relationship between the length of the horizontal portion (41) of the movable hole (12) and the hoop reinforcing bar (40) and the thickness of the support member (50), the support member (50) may be shaken, and a spacer (60) (Fig. 6) may be included to maintain the support member (50) in a state where it is inserted inside the pocket (20) or moved outward.

[0037] The spacer (60) fills the empty space of the movable hole (12) so that the support member (50) does not move, and can be made of various materials such as rubber or metal.

[0038] Since the remaining space of the movable hole (12) is the same whether the support member (50) is inside or outside, only one type is used.

[0039] According to this technology, the spacer (60) can be applied in the same way to the hoop reinforcement (40) when the leg portion (11) is not present.

[0040] In this way, by maintaining the support member (50) inserted inside, when constructing precast concrete panels (100) capable of shear reinforcement at the bottom of the dowel bar, the support member (50) can be prevented from moving outward and interfering with the dowel bar (20), and can also be prevented from falling inward from the bottom of the dowel bar (20) due to grouting pressure during grouting.

[0041] The spacer (60) is not installed in all movable holes (12) but is applied in one or more places, preferably two places along the longitudinal direction of the support member (50).

[0042] The paving method using a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar according to the present invention comprises: a first step of arranging a plurality of precast concrete panels capable of shear reinforcement at the bottom of a dowel bar so that the dowel bar (20) of the precast concrete panel capable of shear reinforcement at the bottom of a dowel bar on one side is inserted into the pocket (30) of the precast concrete panel capable of shear reinforcement at the bottom of a dowel bar on the other side; a second step of moving a support member (50) inside the pocket (30) to the bottom of the dowel bar (20); and a third step of grouting between the precast concrete panels capable of shear reinforcement at the bottom of the dowel bar and inside the pocket (30).

[0043] Referring to Fig. 7 for a more detailed explanation, (A) and (B) are the first steps, and a precast concrete panel (100-1) capable of shear reinforcement is installed at the bottom of the dowel bar as in (A).

[0044] Next, as in (B), a precast concrete panel (100-2) capable of shear reinforcement at the bottom of another dowel bar is lifted, and then the pocket (30) is aligned with the dowel bar (20) of the precast concrete panel (100-1) capable of shear reinforcement at the bottom of the dowel bar that has been pre-positioned, and then lowered so that the dowel bar (20) is inserted into the pocket (30).

[0045] Up until now, since the support member (50) is inserted into the inside of the pocket (30), the dowel bar (20) is inserted into the pocket (30) without interference from the support member (50).

[0046] The second step above is the state of (C), and the support member (50) is moved outward so that it is placed at the bottom of the dowel bar (20). In this way, the dowel bar (20) is in a cantilever shape but is supported by the support member (50), and furthermore, since the support member (50) is supported by the hoop reinforcing bar (40) (leg part (11)), it has bracing rigidity against shear load even when it is applied.

[0047] The above third step is to grout by injecting grout material through the gaps between the precast concrete panels (100-1, 100-2) capable of shear reinforcement at the bottom of the dowel bar, and the grout material is grouted (G) as it rises from the bottom to the inside of the pocket (30) and to the surface of the precast concrete panels (100-1, 100-2) capable of shear reinforcement at the bottom of the dowel bar.

[0048] In the grouting (G), the dowel bar (20), the hoop reinforcing bar (40), and the support member (50) are integrally combined through the grout material to form a connection part, and the rigidity of the connection part is increased by adding the support member (50).

[0049] <Example 2>

[0050] As shown in FIG. 8, the precast concrete panel (100) capable of shear reinforcement at the bottom of the dowel bar according to the present embodiment comprises a panel body (10), a dowel bar (20), a pocket (30), a half-section hoop reinforcement (40) formed as a connecting configuration on the periphery of the panel body (10), and a support member (50) that supports the dowel bar (20), and the support member (50) is fixed in a position where it can support the dowel bar (20) of an adjacent panel body (10) from the bottom.

[0051] In the drawing, the end of the support member (50) is shown as exposed, but it is not necessarily exposed.

[0052] The construction method according to the present embodiment separates adjacent panels (100) so that the dowel bar (20) does not interfere, and moves one (or two) of the panels (100), at which time the dowel bar (20) is placed on a support member (50), that is, the support member (50) supports the dowel bar (20) from the bottom to prevent the dowel bar (20) from tipping over. Explanation of the symbols

[0053] 10: Panel body, 11: Leg part 12 : Mobile cage hall, 20: Dowel bar, 30: Pocket 40: Hoop reinforcement, 41: Horizontal section 50 : Support member, 60 : Spacer,

Claims

Claim 1 A precast concrete panel capable of shear reinforcement at the bottom of a dowel bar, comprising: a panel body; a pocket formed on one or more sides of the panel body and a hoop reinforcing bar received within the pocket; and a dowel bar formed on a periphery of the panel body that is not a pocket, wherein a plurality of such dowel bars are constructed adjacently so that the dowel bar is inserted into an adjacent pocket and the interior of the pocket is grouted and paved, and a support member that supports the dowel bar of the adjacent panel body from the bottom within the pocket, wherein the support member is installed so as to be movable outward from the interior of the pocket and is configured to move to the bottom of the dowel bar after the dowel bar is received within the pocket. Claim 2 delete Claim 3 A precast concrete panel capable of shear reinforcement at the bottom of a dowel bar, characterized in that, in claim 1, the panel body includes a movable hole formed along the direction of movement of the support member and into which the support member is movably inserted. Claim 4 delete Claim 5 A precast concrete panel capable of shear reinforcement at the bottom of a dowel bar, characterized in that, in claim 1 or claim 3, the support member is a reinforcing bar or a steel rod. Claim 6 A precast concrete panel capable of shear reinforcement at the bottom of a dowel bar, wherein, in claim 3, it includes a spacer for maintaining the inner or outer position of the support member, and the spacer is inserted into the movable hole or supported by the hoop reinforcement. Claim 7 A paving method using precast concrete panels capable of shear reinforcement at the bottom of a dowel bar according to claim 1, comprising: a first step of mounting precast concrete panels capable of shear reinforcement at the bottom of a dowel bar on a road surface, wherein a dowel bar of a precast concrete panel capable of shear reinforcement at the bottom of an adjacent dowel bar is inserted into a pocket of a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar on one side; a second step of supporting the dowel bar with a support member inside the pocket; and a third step of grouting the space between the precast concrete panels capable of shear reinforcement at the bottom of the dowel bar. Claim 8 A paving method using a precast concrete panel capable of shear reinforcement at the bottom of a dowel bar, characterized in that, in claim 7, the first step involves inserting a support member inside the pocket so as not to interfere with the insertion of the dowel bar, and the second step involves moving the support member outward toward the dowel bar after the dowel bar is inserted into the pocket to support the dowel bar. Claim 9 delete

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