KR101881051B1 - Precast Concrete Assembly Structure with Enhanced Seismic Performance and Construction Method Thereof - Google Patents

Abstract

The present invention relates to a prefabricated PC structure with enhanced seismic performance able to be maintained in a robustly assembled state even if external force is applied due to an earthquake or the like, and a construction method thereof. According to an aspect of the present invention, the prefabricated PC structure with enhanced seismic performance is characterized by comprising: a horizontal unit having a predetermined width and a predetermined length; a vertical unit connected to one end of the horizontal unit and having a vertical length so as to have a predetermined height; a hunch unit formed to be inclined at a predetermined angle so as to reinforce a portion where the horizontal unit and the vertical unit are in contact with each other; and a side surface connection unit which is provided on both side surfaces of the vertical unit and is connected to each other by another vertical unit and a first connection unit provided adjacent to each other.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prefabricated PC structure having enhanced seismic performance,

The present invention relates to a prefabricated PC structure having enhanced seismic performance and a method of constructing the prefabricated PC structure. More particularly, the present invention relates to a PC building wall (PC structure) To a prefabricated PC structure reinforced with a seismic performance that is rigidly connected so that an assembled PC structure is not easily separated even if a large external force such as an earthquake is applied, and a construction method thereof.

Generally, when a road or a building is constructed, a retaining wall for preventing the collapse of a steep slope formed by piling up soil or carving out a mountain near a road or a building is installed, and the noise of the road is transmitted to a nearby building A soundproof wall is installed.

In this case, the retaining wall is constructed by stacking compact concrete blocks manufactured in advance at predetermined sizes along slopes, or when the slopes are low, the form is installed in an L shape or an inverted T shape at the site, And the concrete is poured by the method.

In addition, the base structure for installing the soundproof wall is constructed by placing the formwork in an L shape or an inverted T shape like a method of constructing the retaining wall by placing the concrete in the field, arranging the reinforcing bars in the interior, And the soundproof panel is vertically erected so as to have a predetermined height on the base portion.

As described above, conventionally, a retaining wall and a soundproofing wall (base part) have been constructed by installing a formwork on a site and installing the concrete. However, in the case of such a site construction method, in order to install and remove a concrete form, There is a problem that the quality of the retaining wall and the soundproofing wall, which are constructed by placing the concrete in the site, can not be maintained constantly.

In recent years, a retaining wall of precast concrete (PC) and a soundproofing wall foundation structure, which are preliminarily manufactured in a factory at a predetermined size, have been used.

As an example of the prior art concrete retaining wall (hereinafter, referred to as 'PC retaining wall'), an eco-friendly integral wall type PC retaining wall structure and a construction method of Japanese Patent Registration No. 1571647 are exemplified. The structure includes a vertical plate erected in a vertical direction and a bottom plate protruding laterally in a lower portion of the vertical plate so that a side end face is formed in an L shape and a plurality of A PC wall member; A PC bottom plate member extending from a free end side of the bottom plate of the PC wall member; And a coupler member for connecting the bottom plate of the PC wall member and the PC bottom plate member. When the PC wall structure is continuously and continuously arranged in parallel, the vertical plates of the neighboring PC wall members are connected to each other, The coupling member includes a ball joint formed at a center portion thereof, a coupler member formed at the left and right sides of the ball joint, and a vertical plate and a PC bottom plate of the PC wall member, And the other end portion is constituted by a fastening portion where a through hole is formed and a nut portion fastened to prevent the coupler member from being detached from the fastening portion.

In the conventional PC retaining wall as described above, the adjacent PC wall members are assembled to each other by an engaging member composed of a bolt and a nut. In such a bolt engaging structure, the PC wall members assembled to each other are twisted , The bolted connecting member is easily broken and the connected PC wall members are disconnected. As a result, the soil is crumbled between the PC wall members that are disconnected, There is a problem that a safety accident occurs.

Therefore, it is required to develop a PC structure with improved seismic performance and a construction method thereof, which can firmly maintain the state of interconnection assembly even when a PC structure used as a foundation of a retaining wall or a soundproofing wall is subjected to large external forces due to an earthquake or the like.

KR 10-1571647 B1 (Nov. 18, 2015) KR 10-0799358 B1 (2008. 01. 23.) KR 20-0407837 Y1 (2006. 01. 27.)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the conventional constructional PC structure, and it is an object of the present invention to provide a seismic isolation structure capable of stably maintaining an assembled state even when a large external force is applied due to an earthquake, To provide the reinforced prefabricated PC structure and a construction method thereof.

According to an aspect of the present invention, there is provided a prefabricated PC structure having enhanced seismic performance, comprising: a horizontal portion having a predetermined width and a predetermined length; A vertical part connected to one end of the horizontal part and having a vertical length so as to have a predetermined height; A vertical portion formed to be inclined at a predetermined angle so that the horizontal portion and the vertical portion abut each other; And a side connecting portion which is provided on both side surfaces of the vertical portion and is connected to another vertical portion provided adjacent to the vertical portion by the first connecting body.

In addition, the present invention is characterized in that the side connecting portion is formed on both sides of the vertical portion at a predetermined depth along the vertical length, And a side coupling body having a "T" -shaped fitting hole formed along the vertical length while being inserted into the installation groove, wherein the first coupling body is made of a steel material having an H- Quot; H "-shaped shape, and the non-shrinkable mortar is filled between the fitting hole and the first connection body to be cured.

Further, the present invention is characterized in that a horizontal connection portion is formed at the other end of the horizontal portion and a plurality of U-shaped reinforcing bars are arranged at predetermined intervals along the length, and on both side surfaces of the above- And a connection block having a plurality of U-shaped reinforcing bars disposed at predetermined intervals so as to face the horizontal connection portion and having a predetermined width and a predetermined length are connected to the horizontal connection portion, Wherein the horizontal connecting portion and the connecting block are disposed such that the U-shaped reinforcing bars are disposed to be offset from each other, and then a plurality of reinforcing bars are disposed in a direction intersecting the U-shaped reinforcing bars, and the U- The next non-shrinkage mortar is charged, cured and connected to one another.

Meanwhile, a method of constructing a prefabricated PC structure with enhanced seismic performance according to the present invention includes: a pouring concrete pouring step in which a pouring concrete is poured on a floor to form a bottom surface; A PC structure placement step of placing the PC structure manufactured at the factory on the bottom surface; A first connecting member mounting step of inserting an "H" -shaped first connecting member into a side connecting portion provided in a vertical portion of the adjacent PC structure; And a mortar filling and curing step of filling non-shrinkable mortar at a portion connected to each other in the first connecting member installing step and curing the mortar for a predetermined period.

In the present invention, a second connection for inserting an "H" -shaped second connection body into a tether connection portion provided in a spiral portion of the PC structure positioned adjacent to the first connection body installation step and between the mortar filling and curing steps Body installation phase; And a base extension step of connecting the horizontal connection part and the connection block provided in the horizontal part of the arranged PC structure by using a plurality of reinforcing bars.

According to the prefabricated PC structure and the construction method thereof with enhanced seismic performance of the present invention, since two PC structures adjacent to each other are firmly connected by the first and second connecting members having the H-shaped sectional shape, The first and second connecting bodies are not easily deformed. In addition, the side connecting portions and the hammering connecting portions connected to the first and second connecting bodies can be maintained without being damaged easily. As a result, even if an earthquake occurs, , The PC structure, which is firmly connected by the two connectors, can not be easily separated, effectively preventing the sound barrier wall from being damaged or falling off.

1 is a perspective view showing an example in which a prefabricated PC structure having an improved seismic performance according to the present invention is constructed of a soundproof wall.
2 is a perspective view showing an example in which a prefabricated PC structure having enhanced seismic performance according to the present invention is constituted by a retaining wall.
FIGS. 3 and 4 are views showing an example in which the side connecting portions according to the present invention are connected using a first connecting body. FIG.
5 and 6 are views showing an example in which a horizontal connection part according to the present invention is connected to a connection block.
FIGS. 7 and 8 are views illustrating an example in which the knot connecting portion according to the present invention is connected using a second connecting body. FIG.
9 is a process diagram showing a construction method of a prefabricated PC structure with enhanced seismic performance according to the present invention.
10 to 14 are views showing an example of constructing a prefabricated PC structure with enhanced seismic performance according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

An object of the present invention is to provide a prefabricated PC structure in which an earthquake-proof performance is strengthened and a method of construction thereof, which can firmly maintain an assembled state even if an external force is applied by an earthquake or the like. The PC structure (1) The structure is different according to the part and the retaining wall, and therefore, the following description will be made in accordance with these embodiments.

≪ Example 1 >

1, the PC structure 1 according to the first embodiment includes a horizontal portion 10, a vertical portion 20, and a vertical portion 20, as shown in FIG. 1, ), A hook portion (30), and a side connecting portion (40).

According to the present invention, the horizontal portion 10 is horizontally placed on the bottom surface 2 formed by casting the abandoned concrete, and then buried with the soil, whereby the soundproof panel 10 installed on the upper portion of the vertical portion 20 (Not shown) is firmly fixed to the floor surface 2 so as not to be easily overturned even if an external force such as a strong wind acts.

1, a reinforcing bar 11 connected to the vertical part 20 and the hooking part 30 to be described later is protruded from the upper surface of the horizontal part 10, And a plurality of these are formed.

On one side of the vertical portion 20, a reinforcing bar 21 is protruded along a vertical length.

The vertical portion 20 is integrally connected to one end of the horizontal portion 10 so that a soundproof panel is assembled on the upper portion thereof. The vertical portion 20 corresponds to the horizontal portion 10 as shown in FIG. 1 And a side connecting portion 40, which will be described later, is provided on both sides.

A plurality of fastening members (not shown) such as anchor bolts to be assembled with the soundproof panel are provided on the upper part of the vertical part 20 at predetermined intervals.

The tilting portion 30 is configured to reinforce the rigidity of a corner portion where the horizontal portion 10 and the vertical portion 20 are in contact with each other. And is formed to be inclined with a flesh attached to one corner portion that abuts.

The side connection portions 40 are provided on both side surfaces of the vertical portion 20 so as to be rigidly assembled with another PC structure 1 positioned adjacent to the PC structure 1 when the PC structures 1 are installed in a row.

3, the side connection portion 40 includes an installation groove 41 formed on both sides of the vertical portion 20 at a predetermined depth along the vertical length, And a side coupling body 42 in which a "T" -shaped fitting hole 42A is formed along the length.

The side joint 42 is made of C-shaped steel and has a plurality of fixing protrusions 42B protruding at a predetermined distance from the side of the side fitting 42. The free ends of the fixing protrusions 42B are formed in a Y- Shaped.

A plurality of reinforcing bars 22 are arranged at predetermined intervals to integrally form the horizontal portion 10 and the vertical portion 20 of the PC assembly 1 in the factory by the construction of the side connection portion 40 as described above The fixing protrusion 42B of the side coupling body 42 is coupled to the reinforcing bar 22 so as to be integrally formed with the vertical portion 20 so that the fixing protrusion 42B of the side coupling body 42 Is firmly fixed to the inside of the vertical portion (20) and is not easily separated.

When the PC structure 1 is installed as a base of the soundproof wall, the concrete structure is laid on the floor where the soundproof wall is to be installed and is cured for a predetermined period, and the PC structure 1 is carried on the cured floor using a crane or the like Place it in the proper position.

Then, another PC structure 1 is carried and put in close contact with the side surface of the PC structure 1 which is previously seated on the floor surface.

As shown in FIGS. 3 and 4, a PC structure (not shown) is formed by inserting a first connector H1 having an "H" -shaped cross section into a side connecting portion 40 at a position where the pair of PC structures 1 are in contact with each other 1).

After the plurality of PC structures 1 are installed in a row on the bottom surface, the non-shrinkable mortar C is filled into the side connecting portion 40 exposed to the upper surface of the adjacent vertical portion 20, Cure.

When the non-shrinkage mortar C is sufficiently cured, a soundproof panel (not shown) is fixed to the vertical portion 20 of the PC structure 1 using a fastening member to complete the construction.

≪ Example 2 >

The second embodiment relates to an example in which the PC structure 1 is used as a retaining wall. The PC structure 1 according to the second embodiment includes the horizontal part 10, And includes a horizontal connecting portion 50, a hatch connecting portion 60, and a connecting block 70. The horizontal connecting portion 50 and the hook connecting portion 60 are formed of a resin material.

At this time, protrusions (not shown) having a predetermined depth are formed along the horizontal and vertical lengths on one side of the horizontal part 10 and the vertical part 20, (Not shown) having a length corresponding to the projection are formed, whereby when the PC structures 1 are arranged in line so as to be adjacent to each other, the projections and grooves facing each other are inserted and assembled with each other, When the PC structure 1 is kept in tight contact with the side connecting portion 40 and the later described hatch connecting portion 60, the protrusions and the grooves are formed as a whole along the lengths of the horizontal portion 10 and the vertical portion 20 The position of the PC structure 1 installed in a line is not moved arbitrarily, and the originally installed position is maintained even though a large external force due to earth pressure, earthquake or the like is applied while the robustly assembled state is maintained.

The horizontal connection part 50 is a structure for extending the length of the horizontal part 10 so that the connection block 70, which will be described later, is connected horizontally so that the PC structure 1 is not easily rolled over by the earth pressure.

5 and 6, a plurality of U-shaped reinforcing bars 51 are provided at predetermined intervals in the horizontal connection portion 50 at the other end (in a direction opposite to the vertical portion) of the horizontal portion 10, The plurality of U-shaped reinforcing bars 51 are connected to the U-shaped reinforcing bars 71 of the connection block 70, which will be described later, by wire or the like.

As shown in FIG. 2, the hatch connection portion 60 is formed on both side surfaces of the hook portion 30 formed to reinforce a portion where the horizontal portion 10 and the vertical portion 20 abut on each other, (1) is added to the side connection portion (40) to secure more firmly.

7 and 8, the hatch connection portion 60 includes an installation groove 61 formed on both sides of the upper portion 30 along a vertical length, And a tangible coupling body 62 in which a "T" shaped fitting hole 62A is formed along the vertical length while being fixed.

A plurality of fixing protrusions 62B protrude from one side of the fixed joint 62 with a predetermined gap therebetween. The free ends of the fixing protrusions 62B have a "Y" shape or a "T And the fixing protrusions 62B of the hung fitting combination 62 are bound to the reinforcing bars arranged to manufacture the PC structure 1. [

When the pair of PC structures 1 are installed adjacent to each other, the second connecting body H2 having an "H" letter shape is inserted into the tangible coupling bodies 62 on both sides thereof, Shrinkage mortar C 'is filled into the interior of the hunting joint 62 so that the first and second joints H1 and H2 of the side connection portion 40 and the hatch connection portion 60, even if a large external force such as an earthquake acts, The PC structure 1 coupled with the high-pressure mercury vapor (H2) is not easily separated, and the installed state is maintained firmly.

The connecting block 70 is a structure for horizontally extending the length of the horizontal portion 10 so that the PC structure 1 is not overturned or disordering due to earth pressure.

The connecting block 70 is installed to face the horizontal connecting part 50 with a width corresponding to the horizontal part 10 and a U-shaped reinforcing bar 51 of the horizontal connecting part 50 is provided at one side of the connecting block 70 A plurality of U-shaped reinforcing bars 71 are provided at predetermined intervals.

5 and 6, when the connection block 70 is connected to the horizontal portion 10, the connection block 70 is aligned with the horizontal connection portion 50 of the horizontal portion 10, And then the connecting block 70 is brought into close contact with the horizontal connecting portion 50 in a state where the plurality of U-shaped reinforcing bars 71 disposed to face each other are positioned to be offset from each other.

Then, a plurality of reinforcing bars 52 are arranged in the direction in which the plurality of U-shaped reinforcing bars 71 intersect, and the U-shaped reinforcing bars 51 and 71 and the reinforcing bars 52 are connected to each other with wires.

Then, a mesh net 53 having a predetermined width and length is placed on the mutually-bonded U-shaped reinforcing bars 51 and 71, and then a non-shrinking mortar C '' is sandwiched between the U-shaped reinforcing bars 51 and 71 and the mesh net 53 The horizontal connecting portion 50 and the connecting block 70 are integrally and firmly connected.

9, the PC structure 1 having the above-described structure may be manufactured by the following steps (S10), (S10), (S10), (S10) S40) are progressed step by step. Hereinafter, the construction method of the PC structure will be described.

(1) Injection of abandoned concrete (S10)

In this step, the place for installing the soundproof wall or the retaining wall is excavated to a predetermined depth and the floor surface 2 is formed by pouring the abandoned concrete on the excavated floor. By putting the abandoned concrete in this way, ) Is generally carried out widely, so a detailed description thereof will be omitted.

(2) PC structure placement step (S20)

This step is carried out by carrying a pre-fabricated soundproof wall foundation or a PC structure 1 for retaining wall installation on the floor 2 formed in the step of putting down concrete (S10). At this time, the PC structure 1 is installed in a crane So that the operator can precisely guide the installation position so that the PC structures 1 to be transported are in close contact with one another in a row.

(3) Installing the first connector (S30)

This step is a step of connecting the "H" -shaped first connector H1 to the side connection portion 40 of the two PC structures 1 positioned adjacent to each other when the PC structure 1 is disposed in the PC structure placing step S20. To connect the PC structure (1).

When the PC structure 1 installed at this time is the PC structure 1 for the soundproof wall base part, the first connection body H1 is inserted and connected only to the side connection part 40. In the case of the PC structure 1 for the retaining wall, The second connecting body H2 is inserted into the connecting portion 60 and connected to the connecting portion 40 (S31).

The connection block 70 is connected to the horizontal connection part 50 of the PC structure 1 disposed on the floor 2 in step S32.

(4) Mortar filling and curing step (S40)

This step is carried out when no shrinkage mortar C, C ', C "is attached to the connecting portion H1 (or first and second connecting bodies H1, H2 and connecting block 70) ) And cures for a predetermined period.

When the mortar C, C ', C "is charged and cured, the horizontal part 10 and the connection block 70 are buried in the earth, and then the construction is completed.

As described above, according to the present invention, since the PC structure to be installed adjacent to each other is rigidly connected by the first and second connecting members of the H-shaped sectional shape connecting the side connecting portion and the hatch connecting portion, the seismic performance is improved, Even if a large external force is applied, the PC structures connected by the first and second connecting members are not easily separated from each other, so that the soundproof panel is prevented from being broken or the slurry is prevented from collapsing.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. It is to be understood that the scope of the present invention should not be interpreted as being limited only by the scope of the present invention and that the scope of the present invention should not be construed to be interpreted to limit the scope of the present invention. .

1: PC structure 2: bottom surface
10: Horizontal part 11: Reinforcing bar
20: Vertical section 21: Reinforcing bar
22: Rebar 30:
40: side connection part 41: installation groove
42: side coupling member 42A:
42B: Fixing projection 50: Horizontal connection
51: U-shaped reinforcement 52: Rebar
53: mesh network 60:
61: mounting groove 62:
62A: Insertion hole 62B: Fixing projection
70: connection block 71: U-shaped rebar
C, C ', C ": no shrinkage mortar H1:
H2: second connector

Claims (5)

A PC structure (1) installed to support a lateral earth pressure and an upper load while being preliminarily manufactured at a factory, or to block noise generated at one side,
The PC structure (1)
A horizontal part 10 installed on the floor with a predetermined width and length;
A vertical part 20 connected to one end of the horizontal part 10 and having a vertical length so as to have a predetermined height;
(30) formed to be inclined at a predetermined angle so that the horizontal part (10) and the vertical part (20) abut each other; And
Side connecting portions 40 which are provided on both sides of the vertical portion 20 and which are connected to each other by a first connecting portion H1 and another vertical portion 20 provided adjacent to the vertical portion 20;
Lt; / RTI >
The side connection part (40)
An installation groove 41 formed at both sides of the vertical portion 20 at a predetermined depth along the vertical length; And
A side coupling body 42 which is inserted and fixed in the installation groove 41 and has a fitting hole 42A having a "T" shape along the vertical length;
Lt; / RTI >
At the other end of the horizontal portion 10,
A horizontal connection part 50 is formed in which a plurality of U-shaped reinforcing bars 51 are arranged at predetermined intervals along the length,
On both side surfaces of the sputtering section 30,
A "T" -shaped fitting hole 62A is formed along the upper and lower lengths while being mutually connected by another adjacent set-up portion 30 and the second connecting member H2, A hatch connector 60 is provided,
In the horizontal connection part 50,
A connecting block 70 having a predetermined width and a length and having a plurality of U-shaped reinforcing bars 71 installed at predetermined intervals so as to face the horizontal connecting portion 50 is connected,
The horizontal connection part (50) and the connection block (70)
And a plurality of reinforcing bars 52 are disposed in a direction intersecting with the U-shaped reinforcing bars 51 and 71 after the U-shaped reinforcing bars 51 and 71 are staggered from each other. And the reinforcing bar 52 are connected to each other by wire, then the non-shrinking mortar is filled and cured and integrally connected to each other,
The side coupling body 42 and the hitch coupling body 62,
C-shaped steel,
On one side of the side coupling body 42 and the hitch coupling body 62,
A plurality of fixing protrusions 42B and 62B having free ends formed in a "Y" shape or a "T "
The fixing protrusion 42B,
Is fixedly coupled to a reinforcing bar (22) laid inside the vertical portion (20)
The first and second link members (H1, H2)
H and inserted into the fitting holes 42A and 62A of the side coupling body 42 and the hitch coupling body 62 and then inserted into the fitting holes 42A and 62A and the first and second fitting holes 42A and 62A, Characterized in that no shrinkage mortar is filled between the joints (H1, H2) and is cured.
delete delete A method of constructing a prefabricated PC structure using the PC structure (1) of claim 1,
A step S10 of casting concrete to be poured to form a floor surface 2 by pouring concrete to the floor at a predetermined width;
Placing a PC structure (S20) for placing the PC structure (1) manufactured at the factory on the bottom surface (2);
(S30) for inserting an "H" -shaped first connection body (H1) into a side connection portion (40) made of C-shaped steel in a vertical portion (20) of the PC structure (1) ; And
A mortar filling and curing step (S40) of charging the shrinkable mortar to the portions connected to each other in the first connecting member installing step (S30) and curing the shrinkable mortar for a predetermined period;
Lt; / RTI >
Between the first connecting member installing step (S30) and the mortar charging and curing step (S40)
(S31) for inserting an "H" -shaped second connection body (H2) into a hatch connection portion (60) provided in a hook portion (30) of the adjacent PC structure (1); And
A foundation extension step (S32) of connecting the horizontal connection part (50) provided in the horizontal part (10) of the PC structure (1) and the connection block (70) using a plurality of reinforcing bars (52);
Wherein the method further comprises the step of: delete

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