KR101973701B1 - Assembling type pier - Google Patents

Abstract

The present disclosure relates to a prefabricated bridge pier which can secure safety in spite of occurrence of an earthquake or the like through reflection of an earthquake-resistant design, and at the same time, a prefabricated bridge pier unit structure is quickly assembled and connected.
The prefabricated bridge pier according to an embodiment of the present disclosure is manufactured by a precast method and has a base formed at the lower end thereof, a first lower core receiving groove formed at the center of the upper surface, and a radial direction Wherein the first reinforcing steel bar is vertically arranged and the upper end of the first reinforcing steel bar protrudes from the first upper step portion to the first upper step portion; And a first downward stepped portion is formed around the first upper core receiving groove, and a first downward stepped portion is formed around the first upper core receiving groove in a radially inward direction, A second upper core receiving groove is formed at the center of the upper surface and a second upward stepped portion rising radially inward is formed around the second lower core receiving groove, A lower end of the second reinforcing bar is connected to an upper end of the first reinforcing bar projecting from the first lower step portion and an upper end of the second reinforcing bar is projected toward the second upper step portion; A second upper core receiving groove is formed at the center of the lower surface, and a second downward receiving groove is formed at a periphery of the second upper core receiving groove in a radially inward direction, And a lower end of the third reinforcing bar is protruded to the upper end of the second reinforcing bar and connected to the upper end of the second reinforcing bar Coping structure; A connecting core inserted into the first lower core receiving groove and the first upper receiving groove, and the second lower receiving groove and the second upper receiving groove, which correspond to each other; A first earthquake-resistant spring interposed in the space between the first upward stepped portion and the first downward stepped portion facing each other to support the columnar structure with respect to the foundation structure; A second earthquake-resistant spring interposed between the second upward stepped portion and the second downward stepped portion facing each other to support the coping structure with respect to the columnar structure; And a space between the first upward stepped portion and the first downward stepped portion facing each other, and a field concrete pouring portion placed in the field in a space between the second upward stepped portion and the second downward stepped portion facing each other.

Description

ASSEMBLING TYPE PIER}

The present disclosure relates to a bridge that supports a bridge girder (upper plate) corresponding to a lower structure of the bridge and transmits the load of the bridge girder to the ground.

Unless otherwise indicated herein, the description set forth in this identification section is not prior art to the claims of this application and is not to be construed as prior art as described in this identification section.

In general, a bridge pier corresponds to the substructure of a bridge and supports the bridge girder and transmits the load of the bridge girder to the ground.

These piers are usually made of concrete structures by in situ casting. In order to construct the piers, concrete is placed in the condition that the foundation reinforcing bars and the formwork are arranged after the foundation trenching work in the site, and after curing for a certain period, the foundation is formed. In addition, the cement part which cures the bridge pier while forming the reinforcing bars and the formwork at the upper part with the base part cured, and the coping part which supports the bridge pier, that is, the bridge girder, The pier is completed by pouring.

In the case of such bridges, it takes a lot of construction period and expenses to install the formwork and demold the formwork after construction. Also, depending on the location where the bridge is constructed, traffic congestion may occur in the vicinity or the construction environment may be difficult due to poor working environment, and there is a concern about construction of the bridge.

In order to solve these problems, a prefabricated pier which is constructed by assembling a pier in advance as a unit structure has been spotlighted after carrying out a foundation construction work including a foundation treader from a terrain floor in the field.

Particularly, since the prefabricated bridge structure is constructed in pre-factory, the prefabricated work of the unit structure can be carried out in parallel with the foundation work of the site, The construction time can be shortened compared with the conventional method.

As an example of such a prefabricated bridge pier, Korean Patent Laid-Open Publication No. 10-1994-0021837 (Oct. 19, 1994) has a spherical, circular, and elliptical cross-section, and the lower segment of the upper segment formed by dividing the column into several pre- And the upper end of the corresponding lower segment has a concave shape, a shear force that transmits the compression, tensile force, axial force, and shearing force from the bending moment acting on the upper segment at five different positions is formed in the convex and concave portion And a pillar structure is disclosed.

Korean Patent Laid-Open Publication No. 10-2008-0057108 (published on Jun. 24, 2008) discloses a support structure for supporting a predetermined upper structure, a plurality of segment portions connected to each other so that the support portion can stand at a predetermined height, A protruding portion and a pocket portion formed to be able to engage with each other in the segment portion, wherein the protruding portion and the pocket portion are provided with a key concave portion which is engaged in a forcible fitting manner so as to be mutually engaged with each other in a horizontal direction, And a key convex portion formed on the key convex portion.

Also, Korean Utility Model Laid-Open No. 20-2000-0022191 discloses a reinforced concrete foundation foundation having a plurality of anchor bolts projecting thereon, and each of the connection anchors is fixed to the plurality of anchor bolts, A concrete block for piers with vertically inserted multiple pipes is formed on the inner side. On the top of the stacked piers, a concrete block for piers is installed on the inner side. A steel bar is inserted into a vertical pipe inside a concrete block in a multi-stage concrete block constituting a pier and a vertical pipe driven inside the pier upper concrete block, and the thread of the lower end of the steel bar is fastened to the connecting hole fastened to the anchor bolt And a plate and a nut are fastened to the upper end thread of the steel bar to form a base foundation and a multi- A concrete block for a bridge pier and a concrete block for an upper part of a pier are integrally connected and fixed and a grout layer such as a mortar or an epoxy resin is formed on a joint between the foundation foundation, the pier concrete block and the pier concrete upper concrete block. A bridge pier is disclosed.

Also, Korean Patent Laid-Open No. 10-2008-0057514 (Jun. 25, 2008) 1 includes a body formed with a groove for filling concrete at an upper portion thereof, an upper projection provided in the groove, and a lower projection formed at the bottom of the body And the upper protrusions are fitted to the lower protrusions of the precast segments provided at the upper part of the upper protrusions.

However, the conventional prefabricated bridge pier as described above has a problem in that it is vulnerable to an earthquake or the like in terms of structure, because it is based solely on the purpose of simply assembling and connecting prefabricated pier unit structures quickly and easily.

The present invention provides a prefabricated bridge pier which enables quick and easy assembly and connection of prefabricated bridge pier unit structures while maintaining safety in spite of occurrence of earthquake or the like through reflection of seismic design.

Further, it is obvious that the present invention is not limited to the technical problems described above, and another technical problem may be derived from the following description.

According to an embodiment of the present disclosure, a pre-cast method is used and a base is formed at the lower end, a first lower core receiving groove is formed at the center of the upper surface, and a radially inward direction is formed around the first lower core receiving groove Wherein the first reinforcing steel bar is vertically arranged and the upper end of the first reinforcing steel bar protrudes from the first upper step portion; And a first downward stepped portion is formed around the first upper core receiving groove, and a first downward stepped portion is formed around the first upper core receiving groove in a radially inward direction, A second upper core receiving groove is formed at the center of the upper surface and a second upward stepped portion rising radially inward is formed around the second lower core receiving groove, A lower end of the second reinforcing bar is connected to an upper end of the first reinforcing bar projecting from the first lower step portion and an upper end of the second reinforcing bar is projected toward the second upper step portion; A second upper core receiving groove is formed at the center of the lower surface, and a second downward receiving groove is formed at a periphery of the second upper core receiving groove in a radially inward direction, And a lower end of the third reinforcing bar is protruded to the upper end of the second reinforcing bar and connected to the upper end of the second reinforcing bar Coping structure; A connecting core inserted into the first lower core receiving groove and the first upper receiving groove, and the second lower receiving groove and the second upper receiving groove, which correspond to each other; A first earthquake-resistant spring interposed in the space between the first upward stepped portion and the first downward stepped portion facing each other to support the columnar structure with respect to the foundation structure; A second earthquake-resistant spring interposed between the second upward stepped portion and the second downward stepped portion facing each other to support the coping structure with respect to the columnar structure; And a space between the first upward stepped portion and the first downward stepped portion facing each other, and a field concrete pouring portion placed in the field in a space between the second upward stepped portion and the second downward stepped portion facing each other.

According to a preferred feature of the present disclosure, the first earthquake-proof spring is fitted to the upper end of the first reinforcing steel bar and the lower end of the second reinforcing steel bar, and the second earthquake- And the lower end of the third reinforcing steel bar.

According to the embodiment of the present disclosure, the foundation structure, the pillar foundation, and the coping structure, which have been preliminarily manufactured by the pre-casting method, are quickly and easily laminated under the interposition of the connecting core and the earthquake-resistant spring, There is an advantage that the unit structures of the bridge piers are assembled and connected quickly and easily.

In addition, according to the embodiment of the present disclosure, since the earthquake-resistant spring is interposed between the foundation structure, the column foundation, and the coping structure that are stacked and assembled with each other, the safety of the pier can be maintained despite occurrence of an earthquake or the like.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a prefabricated bridge pier in accordance with one embodiment of the present disclosure;
2 is a cross-sectional structural view of a prefabricated bridge pier according to one embodiment of the present disclosure;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the configuration, operation, and effects of a prefabricated bridge pier according to a preferred embodiment will be described with reference to the accompanying drawings. For reference, in the following drawings, each component is omitted or schematically shown for convenience and clarity, and the size of each component does not reflect actual size. Like reference numerals refer to like elements throughout the specification, and the same reference numerals will be omitted in the drawings.

FIG. 1 shows a perspective view of a prefabricated bridge pier in accordance with one embodiment of the present disclosure, and FIG. 2 shows a cross sectional structural view of a prefabricated bridge pier in accordance with one embodiment of the present disclosure.

1 and 2 and 3, the prefabricated bridge pier 1 according to one embodiment of the present disclosure includes a prefabricated base structure 10, a post structure 20, and a coping structure (30) are sequentially stacked and assembled in the field.

Here, the foundation structure 10 forms a lower concrete structure of the prefabricated bridge pier 1 according to one embodiment of the present disclosure, and is pre-fabricated in a precast manner by the concrete and the first rebar 17.

At the lower end of the foundation structure (10), a base (11) for fixing the ground to the ground is protruded radially outward.

The first lower core receiving groove 13 is formed at the center of the upper surface of the base structure 10. The cemented concrete is filled in the first lower core receiving groove 13 to fix the lower portion of the connecting core 40 at the time of inserting the connecting core 40 and at the same time the base structure 10 and the column structure 20 So that the foundation structure 10 and the pillar structure 20 are jointly fixed to each other.

A first upward stepped portion 15 is formed around the first lower core receiving groove 13 in the upper surface of the base structure 10. The first upward stepped portion 15 serves to form the lower end support portion of the first earthquake-proof spring 50 to be described later, and has a shape that rises inwardly in the radial direction as shown in FIGS. 2 and 3 . It is also preferable that the first upward stepped portion 15 is formed in three stages so that the first earthquake-resistant spring 50 can be interposed between the foundation structure 10 and the columnar structure 20 in the radial direction.

In addition, the first reinforcing bars 17 are vertically arranged in the inside of the foundation structure 10. The upper end of the first reinforcing steel bar 17 is projected to the upper portion of the first upper step portion 15 so as to be connected to the lower end of the second reinforcing steel bar 29 to be described later.

On the above-described foundation structure 10, the columnar structure 20 is assembled and connected in the field. The column structure 20 forms a central concrete structure of the prefabricated bridge pier 1 according to one embodiment of the present disclosure and is prefabricated by concrete and a second rebar 29 in a precast manner.

The first upper core receiving groove 21 is formed at the center of the lower surface of the pillar structure 20. The cemented concrete is filled in the first upper core receiving groove 21 to fix the upper portion of the connecting core 40 at the time of inserting the connecting core 40 and to fix the upper portion of the connecting core 40 to the base structure 10 and the pillar structure 20 So that the foundation structure 10 and the pillar structure 20 are jointly fixed to each other.

A first downward stepped portion 23 is formed around the first upper core receiving groove 21. The first downward stepped portion 23 serves to form the upper support portion of the first earthquake-proof spring 50 to be described later, and has a shape that descends toward the radially inward side as shown in FIGS. 2 and 3 . Also, the first downward stepped portion 23 is preferably formed in three stages so that the first earthquake-resistant spring 50 can be interposed between the foundation structure 10 and the columnar structure 20 in the radial direction.

The second lower core receiving groove 25 is formed at the center of the upper surface of the pillar structure 20. The cemented concrete is filled in the second lower core receiving groove 25 to fix the lower part of the connecting core 40 at the time of inserting the connecting core 40 and at the same time the pillar structure 20 and the coping structure 30 So that the columnar structure 20 and the coping structure 30 are jointed and fixed to each other.

And a second upward stepped portion 27 is formed around the second lower core receiving groove 25. [ The second upward stepped portion 27 serves to form the lower end support portion of the second earthquake-proof spring 60 to be described later, and has a shape that rises inwardly in the radial direction as shown in FIGS. 2 and 3 . The second upward stepped portion 27 is preferably formed in three stages so that the second earthquake-resistant spring 60 can be interposed between the columnar structure 20 and the coping structure 30 along the radial direction.

And the second reinforcing bars 29 are vertically arranged inside the pillar structure 20. The lower end of the second reinforcing bar 29 protrudes from the first lower stepped portion 23 and is connected to the upper end of the first reinforcing bar 17 and the upper end of the second reinforcing bar 29 is connected to the second upper step portion 27 So as to be connected to the lower end of the third reinforcing bar 37 to be described later.

The upper end of the first reinforcing steel bar 17 and the lower end of the second reinforcing steel bar 29 as well as the upper end of the second reinforcing bar 29 and the lower end of the third reinforcing steel bar 37 are screw- Welded joints, and the like.

On the above-described columnar structure 20, a coping structure 30 is assembled and connected in the field. The coping structure 30 forms an upper concrete structure of the prefabricated bridge pier 1 according to one embodiment of the present disclosure for supporting the girder and is constructed in a precast form by concrete and a third rebar 37, .

A second upper core receiving groove 31 is formed at the center of the lower surface of the coping structure 30. The cemented concrete is filled in the second upper core receiving groove 31 and the upper part of the connecting core 40 is fixed at the time of inserting the connecting core 40, So that the columnar structure 20 and the coping structure 30 are jointed and fixed to each other.

A second downward stepped portion 33 is formed around the second upper core receiving groove 31. The second downward stepped portion 33 serves to form the upper support portion of the second earthquake-proof spring 60 to be described later, and has a shape that descends toward the radially inward side as shown in FIGS. 2 and 3 . The second downward stepped portion 33 is preferably formed in three stages so that the second earthquake-resistant spring 60 can be interposed between the columnar structure 20 and the coping structure 30 along the radial direction.

Further, at the upper end of the coping structure 30, a coping portion 35 for supporting the bridge girder (upper plate) is protruded outward.

In addition, a third reinforcing steel bar 37 is vertically arranged in the inside of the coping structure 30. The lower end of the third reinforcing bar 37 protrudes from the second lower stepped portion 33 and is connected to the upper end of the second reinforcing bar 29.

In the first lower core receiving groove 13 and the first upper core receiving groove 21 corresponding to each other and the second lower core receiving groove 25 and the first upper core receiving groove 31 corresponding to each other, (40) are respectively inserted.

The connecting core 40 has a rigidity with respect to the lateral force between the base structure 10 and the column structure 20 in which the lower half is inserted into the base structure 10 and the upper half is inserted into the column structure 20 The lower half is inserted into the column structure 20 and the upper half is inserted into the coping structure 30 to provide rigidity for the lateral force between the column structure 20 and the coping structure 30 laminated to each other , But it may be formed of a precast concrete material depending on the embodiment.

The connection core 40 is inserted into the first lower core receiving groove 13 of the base structure 10 and protruded upward so that the connection core 40 is inserted into the first upper core receiving groove 21, The upper core receiving grooves 31 and the upper core receiving grooves 31 can be easily stacked and protruded upward while being inserted into the second lower core receiving grooves 25 of the pillar structure 20, Thereby facilitating laminated assembly.

A first earthquake-proof spring 50 is interposed in a space between the first upward stepped portion 13 of the foundation structure 10 and the first downward stepped portion 23 of the pillar structure 20 facing each other.

The first earthquake-proof spring 50 supports the column structure 20 with respect to the foundation structure 10 and provides internal elasticity to the lamination connection portion between the foundation structure 10 and the column structure 20, So that the safety of the prefabricated bridge pier 1 according to one embodiment of the present disclosure can be maintained.

The first earthquake-proof spring 50 is preferably a heavy-duty support spring. Although not shown in the drawings, the first upward stepped portion 13 of the foundation structure 10 and the first downward stepped portion 23 of the columnar structure 20 are provided with spring supports for supporting both ends of the first earthquake- It is preferable that a projection or a spring seat groove is formed.

The second earthquake-resistant spring 60 is interposed in the space between the second upward stepped portion 27 of the columnar structure 20 facing each other and the second downward stepped portion 33 of the coping structure 30.

The second earthquake-proof spring 50 supports the coping structure 30 with respect to the pillar structure 20 and provides internal elasticity to the lamination connection portion between the pillar structure 20 and the coping structure 30, So that the safety of the prefabricated bridge pier 1 according to one embodiment of the present disclosure can be maintained.

The second earthquake-proof spring 60 is preferably a heavy-load support spring. Although not shown, a second upward stepped portion 27 of the columnar structure 20 and a second downward stepped portion 33 of the coping structure 30 are provided with a spring supporting portion for supporting both ends of the first earthquake- It is preferable that a projection or a spring seat groove is formed.

 The space between the first upward stepped portion 13 of the foundation structure 10 and the first downward stepped portion 23 of the column structure 20 facing each other and the space between the first downward stepped portion 23 of the columnar structure 20, The site concrete pouring portion 70 is poured in the space between the portion 27 and the second downward stepped portion 33 of the coping structure 30. [

The on-site concrete pouring portion 70 is filled with the concrete pouring in the field, and the first and second earthquake-resistant springs 50 and 60 are fixed and the outside air is prevented from being exposed, so that the first and second earthquake- , 60).

The on-site concrete poured portion 70 is formed in a substantial volume and radial depth between the base structure 10 and the pillar structure 20 and between the pillar structure 20 and the coping structure 30, But depending on the embodiment it may be formed with only small volumes and radial depths on both sides between the base structure 10 and the column structure 20 and between the column structure 20 and the coping structure 30 In this case, it can be formed by shotcrete.

The prefabricated bridge pier according to an embodiment of the present disclosure having the above-described configuration is constructed by pre-fabricating the base structure 10 column foundation 20, the coping structure 30, And the first and second earthquake-resistant springs (50, 60), and at the same time, the unit concrete structures of the bridge piers can be assembled and connected quickly and easily by being fixed by the field concrete pouring portion (70).

In addition, the prefabricated bridge pier according to an embodiment of the present disclosure having the above-described structure has a first earthquake-proof spring 50 interposed between the base structure 10 and the pillar foundation 20, Since the second earthquake-resistant spring 60 is interposed between the water 20 and the coping structure 30, the first and second earthquake-proof springs 50, Safety can be maintained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken in conjunction with the present invention. It is to be understood that various equivalents and modifications may be substituted for those at the time of the present application. It is to be understood, therefore, that the above description is intended to be illustrative, and not restrictive, and that the scope of the present invention will be defined by the appended claims rather than by the foregoing description, All changes or modifications that come within the scope of the equivalent concept are to be construed as being included within the scope of the present invention.

1: Prefabricated pier
10: foundation structure
11: donation
13: first lower core receiving groove
15: first upward step portion
17: 1st rebar
20: Column structure
21: first upper core receiving groove
23: first downward step part
25: second lower core receiving groove
27: second upward step part
29: second rebar
30: Coping structure
31: second upper core receiving groove
33: second downward step part
35:
37: Third Rebar
40: connection core
50: 1st earthquake-proof spring
60: Second Seismic Spring
70: Field concrete pouring part

Claims (3)

The first lower core receiving groove is formed at the center of the upper surface, and a first upward stepped portion is formed around the first lower core receiving groove so as to be radially inward, Wherein the first reinforcing bars are vertically arranged and the upper ends of the first reinforcing bars are projected to the first upper step portion;
And a first downward stepped portion is formed around the first upper core receiving groove, and a first downward stepped portion is formed around the first upper core receiving groove in a radially inward direction, A second upper core receiving groove is formed at the center of the upper surface and a second upward stepped portion rising radially inward is formed around the second lower core receiving groove, A lower end of the second reinforcing bar is connected to an upper end of the first reinforcing bar projecting from the first lower step portion and an upper end of the second reinforcing bar is projected toward the second upper step portion;
A second upper core receiving groove is formed at the center of the lower surface, and a second downward receiving groove is formed at a periphery of the second upper core receiving groove in a radially inward direction, And a lower end of the third reinforcing bar is protruded to the upper end of the second reinforcing bar and connected to the upper end of the second reinforcing bar Coping structure;
A connecting core inserted into the first lower core receiving groove and the first upper receiving groove, and the second lower receiving groove and the second upper receiving groove, which correspond to each other;
A first earthquake-resistant spring interposed in the space between the first upward stepped portion and the first downward stepped portion facing each other to support the columnar structure with respect to the foundation structure;
A second earthquake-resistant spring interposed between the second upward stepped portion and the second downward stepped portion facing each other to support the coping structure with respect to the columnar structure; And
A space between the first upward stepped portion and the first downward stepped portion facing each other, a field concrete pouring portion placed in the field in a space between the second upward stepped portion and the second downward stepped portion facing each other, Prefabricated bridge piers. The method according to claim 1,
Wherein the first earthquake-resistant spring is fitted to the upper end of the first reinforcing steel bar and the lower end of the second reinforcing steel bar, and the second earthquake-resistant spring is fitted to the upper end of the second reinforcing steel bar, A prefabricated pier, characterized in that it is fitted. The method according to claim 1,
An upper end of the first reinforcing steel bar, a lower end of the second reinforcing steel bar, an upper end of the second reinforcing steel bar, and a lower end of the third reinforcing steel bar are connected to each other by screwing or welding A prefabricated bridge pier.

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