KR20180078535A - Assembling type pier - Google Patents

Abstract

The present invention relates to a prefabricated pier to maintain stability through application of seismic design even if earthquake occurs. According to the present invention, the prefabricated pier comprises: a base structure manufactured in a precast type; a column structure manufactured in the precast method to be assembled and connected on the base structure at a site; a coping structure manufactured in the precast method to be assembled and connected to the column structure at the site; a connection fixing rebar; and a seismic spring fixed by a filler.

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, a base is formed at the lower end, a first concrete pocket is formed in a groove shape on an upper surface, and a first lower spring receiving groove is formed around the first concrete pocket Wherein a first reinforcing steel bar is arranged in the inside and an upper end of the first reinforcing steel bar is protruded around the upper end; And a first assembly protrusion protruding from the lower surface of the first assembly protrusion is inserted into the first concrete pocket and a first upper spring receiving recess is formed around the first assembly protrusion, And a second lower spring receiving groove is formed around the second concrete pocket. A second reinforcing steel bar is arranged inside the second lower spring receiving groove, And a columnar structure having a lower end and an upper end protruding from the upper end of the second reinforcing bar; And a second assembly protrusion protruding from the lower surface of the second assembly protrusion is inserted into the second concrete pocket, and a second upper spring receiving groove is formed around the first assembly protrusion, A coping structure formed corresponding to the second lower spring receiving groove and having a coping portion for supporting a girder at an upper end thereof, a third reinforcing steel bar arranged inside and a lower end of the third reinforcing steel bar projecting around a lower end; A connecting fixed reinforcing bar connecting 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; And an earthquake-proof spring that is received in the first lower spring receiving groove and the first upper spring receiving groove, and the second lower spring receiving groove and the second upper spring receiving groove, .

According to a preferred feature of the present disclosure, the lateral perimeter of the column structure, the top periphery of the column structure, and the radially inwardly embodied side periphery of the bottom edge of the coping structure, And the connection fixed reinforcing bars are embedded and fixed by the installation of the side concrete in the field concrete.

According to the embodiment of the present disclosure, since the foundation structure, the pillar foundation, and the coping structure previously manufactured by the pre-casting method are quickly stacked by the concrete pockets and the assembling projections and simultaneously fixed by the connection fixing reinforcing bars, Of the unit structures can be quickly and easily assembled and connected.

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 an exploded cross-sectional view of a prefabricated bridge pier in accordance with one embodiment of the present disclosure;
3 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.

Figure 1 illustrates a perspective view of a prefabricated bridge pier in accordance with one embodiment of the present disclosure, Figure 2 illustrates a exploded cross-sectional view of a prefabricated bridge pier in accordance with one embodiment of the present disclosure, Sectional structural view of a prefabricated bridge pier according to an example.

The prefabricated bridge pier 1 according to one embodiment of the present disclosure includes a foundation structure 10, a pillar structure 20 and a coping structure 30, which are prefabricated in a precast manner, as shown in Figs. 1 to 3, Which are stacked in order and assembled and connected to each other.

Wherein 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 prefabricated 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.

In addition, a groove-shaped first concrete pocket 13 is formed on the upper surface of the foundation structure 10. The first concrete pockets 13 are filled with the cured concrete so that the cemented concrete is interposed between the foundation structures 10 and the pillar structures 20 at the joining surfaces of the pillar structures 20 during the pile- So that the structure 10 and the pillar structure 20 are jointly fixed.

A first lower spring receiving groove 15 is formed around the first concrete pocket 13 in the upper surface of the foundation structure 10. The first lower spring receiving groove 15 serves to form a lower receiving portion of the seismic spring 50 to be described later. The first lower spring receiving groove 15 serves as a lower receiving recess of the base structure 10 and the columnar structure 20 may be formed at intervals of a predetermined angle around the first concrete pockets 13 so that a plurality of seismic resilient springs 50 can be interposed between the joint surfaces of the first concrete pockets 13, Although not shown, the first lower spring receiving groove 15 also includes a first concrete padding 13 surrounded by only one seismic spring 50 between the joining surfaces of the foundation structure 10 and the pillar structure 20 May be formed in a ring shape surrounding the first concrete pockets (13) so as to be interposed therebetween.

In addition, the first reinforcing bars 17 are arranged in the inner wall of the foundation structure 10 as a network structure. The upper end of the first rebar 17 is bent around the upper end side of the foundation structure 10 and protrudes outward of the foundation structure 10 for connection fixation by the connection fixing reinforcement 40 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.

A first assembling protrusion 21 inserted and fixed into the first concrete pocket 13 of the foundation structure 10 is protruded from the lower surface of the pillar structure 20. The first assembly projections 21 are inserted into the first concrete pockets 13 of the foundation structure 10 while being stacked in the first concrete pockets 13 while being inserted into the first concrete pockets 13 at the time of stacking the column structures 20 with respect to the foundation structure 10. [ It is preferable that the cured concrete has a shape corresponding to that of the first concrete pockets 13 and serves to uniformly apply the cured concrete to the joint surfaces of the foundation structure 10 and the column structure 20. [

A first upper spring receiving groove 23 is formed around the first assembling protrusion 21 of the lower surface of the pillar structure 20 to correspond to the first lower spring receiving groove 15 of the base structure 10. The first upper spring receiving groove 23 is combined with the first lower spring receiving groove 15 of the base structure 10 to form a receiving space for the seismic spring 50.

In addition, a groove-shaped second concrete pocket 25 is formed on the upper surface of the pillar structure 20. The micro cured concrete is filled in the second concrete pocket 25 so that it is interposed in the micro cured concrete on the joint surface of the foundation structure 10 and the column structure 20 at the time of stacking the column structures 20, So that the structure 20 and the later-described coping structure 30 are jointly fixed.

A second lower spring receiving groove 27 is formed around the second concrete pocket 25 in the upper surface of the pillar structure 20. The second lower spring receiving groove 27 serves to form a lower receiving space of the earthquake-resistant spring 50 to be described later. As shown in FIGS. 2 and 3, the columnar structure 20 and the coping structure 30 The plurality of earthquake-resistant springs 50 may be interposed between the joint surfaces of the first concrete pockets 25 and the second concrete pockets 25, respectively. Although not shown, the second lower spring receiving grooves 27 also include a second lower spring receiving groove 27 that also surrounds the second concrete pocket 25, with only one seismic spring 50 between the pillar structure 20 and the abutment surface of the coping structure 30 May be formed in a ring shape surrounding the second concrete pocket 25 so as to be interposed therebetween.

In addition, the second reinforcing bars 29 are arranged in the columnar structure 20 as a network structure. The lower end and the upper end of the second reinforcing steel bar 29 are bent around the lower end and the upper end side of the columnar structure 20 so as to protrude to the outside of the columnar structure 20 in order to fix the connection by the connecting stationary reinforcement 40 to be described later .

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, .

 On the lower surface of the coping structure 30, a second assembling protrusion 31 inserted into the second concrete pocket 25 of the pillar structure 20 is protruded. The second assembly projections 31 are inserted into the second concrete pockets 25 of the pillar structure 20 at the time of stacking the coping structures 30 with respect to the pillar structure 20, It is preferable that the cured concrete has a shape corresponding to that of the second concrete pockets 25 so as to uniformly apply the cured concrete to the joint surfaces of the pillar structure 20 and the coping structure 30. [

A second upper spring receiving groove 33 is formed around the second assembling protrusion 31 in the lower surface of the coping structure 30 so as to correspond to the second lower spring receiving groove 27 of the pillar structure 20 . The second upper spring receiving groove 33 is combined with the second lower spring receiving groove 27 of the pillar structure 20 to form a receiving space for the seismic spring 50.

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, the third reinforcing bars 37 are arranged in the inner wall of the coping structure 30 as a network structure. The lower end of the third reinforcing bar 37 is bent around the lower end and the upper end side of the coping structure 30 and protrudes outward of the coping structure 30 in order to fix the connection by the connecting stationary reinforcement 40 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 steel bar 29 and the lower end of the third reinforcing steel bar 37 Lt; / RTI >

The connecting fixed reinforcing bars 40 are connected at both ends to the ends of the first reinforcing bars 17 and the second reinforcing bars 29 to connect and fix the base structure 10 and the column structures 20 stacked thereon Both ends of the second reinforcing bar 29 and the third reinforcing bar 37 are connected to each other to connect and fix the pillar structure 20 and the coping structure 30 stacked thereon, And is connected to the ends of the first to third reinforcing bars 17, 29, 37 by various joining methods such as joining, welding, and the like.

An earthquake-resistant spring 50 is interposed between the above-described foundation structure 10 and the column structure 20 stacked thereon and between the column structure 20 and the coping structure 30 stacked thereon.

The earthquake-proof spring 50 provides internal elasticity between the foundation structure 10 and the pillar structure 20 and between the pillar structure 20 and the coping structure 30, So that the safety of the prefabricated bridge pier 1 according to an embodiment of the present disclosure can be maintained. In this way, the first lower spring receiving groove 15 of the foundation structure 10 and the post structure The second upper spring receiving grooves 27 of the pillar structure 20 and the second upper spring receiving grooves 33 of the coping structure 30 of the first and second upper spring receiving grooves 23, And is fixed by a filling material filled therein after being accommodated.

The earthquake-proof spring 50 is preferably a heavy-duty support spring, and the filler for securing the earthquake-proof spring 50 can be charged by a known grouting method.

The upper end of the base structure 10 to which the connection fixing steel bar 40 is exposed, the lower end periphery and the upper end periphery of the column structure 20 and the lower end periphery of the coping structure 30, It is preferable that the mouth portion 60 is formed.

The side fitting portion 60 is filled with concrete by being poured in the field so as to prevent exposure of outside air at the connecting ends of the connection fixing reinforcing bars 40 and the first, second and third reinforcing bars 17, 29 and 37, And the like. Although the side fitting portion 60 is shown at a considerable depth in FIG. 2, it is preferable that the side fitting portion 60 is actually 100 to 150 mm deep, and the in-situ concrete installation of the side fitting portion 60 can be performed by shotcrete.

The prefabricated bridge pier according to an embodiment of the present disclosure having the above-described construction is characterized in that the foundation structure 10 preformed by the precast method, the column foundation 20, the coping structure 30, The first concrete pockets 13 and the first assembly projections 21 and the second concrete pockets 25 filled with the cured concrete and the second assembly projections 31 are quickly and easily laminated, As the connecting ends of the second and third reinforcing bars 17, 29 and 37 are connected and fixed by the connecting fixed reinforcing bars 40, the unit structures of the bridge piers can be quickly and easily assembled and connected.

In addition, the prefabricated piers according to an embodiment of the present disclosure having the above-described structure are formed between the foundation structure 10 and the pillar substrate 20 laminated to each other and between the pillar substrate 20 and the coping structure 30 The safety of the pier can be maintained by the elastic connection structure of the earthquake-proof spring 50 despite the occurrence of an earthquake or the like.

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 concrete pocket
15: first lower spring receiving groove
17: 1st rebar
20: Column structure
21: First assembly projection
23: first upper spring receiving groove
25: second concrete pocket
27: second lower spring receiving groove
29: second rebar
30: Coping structure
31: Second assembly projection
33: second upper spring receiving groove
35:
37: Third Rebar
40: Fixed reinforcing bars
50: Seismic spring
60: side fitting portion

Claims (3)

A first concrete pockets are formed on the upper surface, a first lower spring receiving groove is formed around the first concrete pockets, a first reinforcing steel bar is arranged inside the first concrete pockets, A base structure having an upper end protruding from the first reinforcing bar;
And a first assembly protrusion protruding from the lower surface of the first assembly protrusion is inserted into the first concrete pocket and a first upper spring receiving recess is formed around the first assembly protrusion, And a second lower spring receiving groove is formed around the second concrete pocket. A second reinforcing steel bar is arranged inside the second lower spring receiving groove, And a columnar structure having a lower end and an upper end protruding from the upper end of the second reinforcing bar;
And a second assembly protrusion protruding from the lower surface of the second assembly protrusion is inserted into the second concrete pocket, and a second upper spring receiving groove is formed around the first assembly protrusion, A coping structure formed corresponding to the second lower spring receiving groove and having a coping portion for supporting a girder at an upper end thereof, a third reinforcing steel bar arranged inside and a lower end of the third reinforcing steel bar projecting around a lower end;
A connecting fixed reinforcing bar connecting 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; And
And an anti-vibration spring received in the first lower spring receiving groove and the first upper spring receiving groove and corresponding to the second lower spring receiving groove and the second upper spring receiving groove, respectively, Prefabricated piers included. The method according to claim 1,
A side fitting portion is formed at the upper end of the base structure to which the connection fixed reinforcing bar is exposed, the lower end periphery and the upper end periphery of the column structure and the lower end of the coupling structure are embedded radially inward, And the side incision is embedded and fixed by in-situ concrete pouring. The method according to claim 1,
Characterized in that the filler is filled by a grouting method.

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