KR101756064B1 - Twin-leaf arch system using tendons arranged in x-shape and fabrication method for thereof - Google Patents

Abstract

The present invention relates to a two-segment precast concrete arch system using an X-shaped steel bar tensional material and a method of construction thereof. The two-segment precast concrete arch system according to an embodiment of the present invention is manufactured by precasting, 3, a plurality of bifurcated segments 10 arranged in the longitudinal direction to form arcuate structures 1 in abutment with each other in the transverse direction and arranged vertically on the ceiling portion 3, And a pair of rigid members (21, 23) intersecting with each other, wherein each of the rigid members (21, 23) comprises a pair of bifurcated segments (10) (20), and a steel bar supporting portion (30) detachably mounted on the two-segment segment (10) and fixing one end of the steel bar tensions (21, 23) to support the X- .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-segment precast concrete arch system using an X-

The present invention relates to a two-segment precast concrete arch system using an X-shaped steel bar tensional material, and more particularly to a two-segment precast concrete arch system using X-shaped steel bar tensions and, more particularly, To a two-segment precast concrete arch system for binding two segment segments in the longitudinal direction and a construction method thereof.

In order to shorten the length of air and improve the quality of concrete, recently, instead of the existing construction method of pouring the concrete structure in the field, a precast concrete (precast concrete concrete, PC) method is attracting attention. In the case of constructing a structure such as an arched tunnel or a bridge, the arched segment is formed as a precast member and is transported to the site for assembly. However, in the case of using the arcuate segment, the size and weight of the segment itself are very large, which makes transportation and installation difficult.

Accordingly, as a method for improving the transportation and installation workability of the segments, a two-segment precast arch structure has been devised as disclosed in the patent documents of the following prior art documents. The two-segment precast arch structure is formed by making segments of a pre-cast concrete member having an arch shape divided into two members into segments, arranging the segments in the lateral direction and longitudinal direction, Construction. Here, the integration of the segments is performed in such a manner that the segments segmented in the lateral direction by placing the concrete are rigidly joined, and the segments segmented through the tie rods or the reinforcing bars are mutually fixed laterally until the strong coupling is completed . However, according to this method, segments segmented only in the transverse direction are bound and no binding force is applied in the longitudinal direction. Therefore, when the concrete is poured in this state, due to the clearance existing between the longitudinally arranged segments The structure becomes very unstable. In addition, in order to solve the instability of such a structure, when the additional gravity is applied or the separate binding means is installed in the longitudinal direction, the construction cost rise and the construction delay occur.

Accordingly, there is an urgent need for a solution to the above-mentioned problem that occurs in the construction of the conventional two-segment precast arch structure.

KR 10-1384738 B1

SUMMARY OF THE INVENTION The present invention is directed to solving the problems of the prior art described above, and one aspect of the present invention is to provide a method of manufacturing a two-segment precast segment in which a pair of steel bar tensions are arranged in an X- And the two-segment precast segments are bound and fixed to each other in the direction of the arrow.

The two-segment precast concrete arch system according to the present invention comprises a plurality of bifurcated segments fabricated in a pre-casting fashion, one pair of which form an arcuate structure in the transverse direction at the ceiling to form an arcuate structure, And a pair of steel bar tensions arranged vertically on the ceiling part and crossing in an "X " shape, and each of the steel bar tensions comprises a pair of two-segment segments arranged in a diagonal direction X-steel rods; And a steel bar supporting part detachably mounted to the two-segment segment and fixing one end of the steel bar tensional material and supporting the X-steel bar part, wherein the X- A plurality of the two-segment segments are temporarily supported in the process of installing the two-segment segments.

In addition, in the two-segment precast concrete arch system according to the present invention, the X-steel bar portion includes four bifurcated segments constituting the two arcuate structures adjacent to each other in a diagonal direction, Respectively.

Further, in the two-segment precast concrete arch system according to the present invention, the steel bar supporting portion is formed of concrete.

Further, in the two-segment precast concrete arch system according to the present invention, the steel bar supporting portion is disposed upwardly spaced from the upper surface of the two-segment segment; A support disposed to protrude from an upper surface of the bifurcated segment and to support the body; A pair of connection shafts protruding upward and downward from the outer surface of the main body; A pair of fixing parts formed in a block shape and rotatably coupled to each of the pair of connection shafts and having a through hole for inserting and fixing the rigging member; And a tension nut screwed on one end of the rod-like tension member passing through the fixing portion and tensing the rod-like tension member with a repulsive force generated when the rod is rotated while being in close contact with the fixed portion.

In the two-segment precast concrete arch system according to the present invention, the main body is formed in a plate shape, the connection shaft is formed on the upper surface and the lower surface of the main body, And a rib screwed to the connection shaft and coupled to the outer surface of the connection shaft.

Further, in the two-segment precast concrete arch system according to the present invention, the first steel bar tensions disposed upward of the X-steel bar portion are disposed upward of a pair of the steel bar supporting portions facing each other in the first diagonal direction The second steel bar tensions fixed to the fixing portion and disposed on the downward side of the X-steel bar portion are arranged in a downward direction of the pair of the steel bar supporting portions facing each other in the second diagonal direction intersecting with the first diagonal direction. And is fixed to the fixing portion.

In addition, in the two-segment precast concrete arch system according to the present invention, a plate-like protruding portion is formed on the lower side of one end of the two-segmented segments contacting each other in the lateral direction so as to have the dented convex portion on the top of the ceiling portion A reinforcing bar which is formed in the dome and binds the two segment segments tangentially in a lateral direction; And concrete embedded in the copper.

In addition, in the two-segment precast concrete arch system according to the present invention, the steel bar supporting portion is formed in a block shape extending from the upper surface of the two segmented segments, and is vertically arranged so as to intersect in an "X & And a pair of through holes into which one end of the steel bar tension member is inserted.

Meanwhile, a method for constructing a two-segment precast concrete arch system according to an embodiment of the present invention includes the steps of (a) forming a plurality of two-segment segments by pre-casting, And successively arranging the arcuate structure in a longitudinal direction; (b) attaching a steel bar support detachably to an upper surface of the bifurcated segment; And (c) connecting the first steel bar tensions to a pair of steel bar supports arranged in the first diagonal direction, and arranging the second steel bar tensions on the top of the first steel bar tensions and the top of the ceiling, And connecting them to a pair of steel bar supports arranged in a second diagonal direction.

In addition, in the method of constructing a two-segment precast concrete arch system according to the present invention, the step (b) includes the steps of drilling an inserting hole on the upper surface of the two-segmented segment; Inserting and fixing one end of a support within the insertion hole; Fixing a main body having a pair of connection shafts protruding upwardly and downwardly on the other end of the support frame; And a fixing part having a through hole into which the steel bar tensions are inserted, to be rotatably coupled to each of the pair of connection shafts.

In addition, in the method for constructing a two-segment precast concrete arch system according to the present invention, in the step (c), the X-steel bar portion in which the steel bar tensions are arranged in an X- A plurality of the two segments are arranged along the longitudinal direction while connecting the four segments in a diagonal direction to each other.

In addition, in the method of constructing a two-segment precast concrete arch system according to the present invention, in the step (c), a tension nut is screwed and tightened at both ends of each of the steel bar tensions passing through the fixing portion, In a direction perpendicular to the direction of movement.

Further, in the method of constructing a two-segment precast concrete arch system according to the present invention, a joint portion protruding in the form of a plate at the lower end of one end of the two-segment segment contacting each other in the lateral direction after the step (c) And pouring the concrete in the upper part of the ceiling part of the roof part.

Meanwhile, a method of constructing a two-segment precast concrete arch system according to another embodiment of the present invention includes: (a) a plurality of two-segment segments formed by a pre-casting method in which a rod- Arranging the arcuate structures in a longitudinal direction by continuously arranging a pair of the arcuate structures in contact with each other in a lateral direction at a ceiling portion; And (b) a pair of through-holes penetrating in an "X" shape so as to intersect with each other in an up-and-down direction is formed on the steel bar supporting portion, And the second steel bar tension member is vertically arranged on the top of the first steel bar tension member and on the top of the ceiling portion so as to intersect in the shape of an "X " And inserting and fixing the inserting hole disposed in the downward direction of each of the pair of the strong-bar supporting portions.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

According to the present invention, the two segment segments arranged in the diagonal direction among the two segment segments arranged in the longitudinal direction to form the arcuate structure come into contact with each other in the X direction, , The two segmented segments are mutually anchored transversely and longitudinally prior to concrete pouring, so that a rigidly stiffened structure can be constructed.

1 is a cross-sectional view of a two-segment precast concrete arch system in accordance with an embodiment of the present invention.
2 is an enlarged perspective view of the circle A of FIG.
3 is a perspective view of the steel bar supporting portion shown in Figs. 1 and 2. Fig.
4 is a perspective view of the X-steel rod portion shown in Fig.
5 to 6 are perspective views of a two-segment precast concrete arch system according to another embodiment of the present invention.
7 is an enlarged cross-sectional view of the circle A in Fig.
8 to 9 are process drawings of a method of constructing a two-segment precast concrete arch system according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. Also, the terms "first "," second ", and the like are used to distinguish one element from another element, and the element is not limited thereto. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts which may unnecessarily obscure the gist of the present invention will be omitted.

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

FIG. 1 is a cross-sectional view of a two-segment precast concrete arch system in accordance with the present invention, and FIG. 2 is an enlarged perspective view of circle A of FIG.

1 and 2, a two-segment precast concrete arch system according to an embodiment of the present invention is manufactured by a pre-casting method, and a pair of the arch-shaped structures 1 are disposed in the horizontal direction at the ceiling portion 3, And a pair of steel bar tensions 21 and 23 arranged vertically on the ceiling portion 3 and crossing in an "X" shape, , Wherein the X-steel bar portion (20) comprises a pair of bifurcated segments (10) each of which is arranged in a diagonal direction and each of the barrel tensions (21, 23) And includes a steel bar supporting portion 30 which is mounted so as to fix one end of the steel bar tensions 21 and 23 and supports the X-steel bar portion 20. The X-steel bar portion 20 and the steel bar supporting portion 30 Supports the plurality of the bifurcated segments 10 temporarily in the process of installing the bifurcated segments 10.

When a structure such as an arched tunnel or bridge is to be constructed, a precast concrete (PC) method is generally used in which an arched member is manufactured at a factory and assembled at the site using a piling machine instead of an on-site concrete pouring method. As a means for improving the transportation and installation workability of the arcuate member, a segmental arch member in which an arcuate member is segmented is used as a segment. These segments are rigid in the transverse direction by pouring concrete, but are fixed to each other through tie rods or reinforced concrete joints until the reinforcement joints are completed. However, according to this conventional method, the segmented segments are bound only in the transverse direction, and there is a clearance between the segments arranged in the longitudinal direction, so that the structure becomes unstable, and additional attraction and separate binding means are required A problem arises in that the construction cost is increased and construction is delayed. As a solution to this problem, a two-segment precast concrete arch system according to the present invention has been found.

Specifically, a two-segment precast concrete arch system in accordance with the present invention includes a plurality of bifurcated segments 10, an X-steel bar 20, and a steel bar support 30.

A plurality of bifurcated segments 10 are concrete members manufactured by a precasting method. A pair of members are horizontally tangent to each other at a ceiling portion 3 to form an arcuate structure 1. The arcuate structure 1 is longitudinally So as to form a structure having a predetermined length. At this time, the two-segmented segments 10 which are in contact with each other and are disposed adjacent to each other are fixed to each other by the X-

The X-steel bar portion 20 is a member that binds different two-segment segments 10, and includes a pair of steel bar tensions 21 and 23. In this case, the steel bar tensions 21 and 23 are PC steel bars, that is, tendons in the form of a steel bar, and a pair of steel bar tensions 21 and 23 are arranged in the vertical direction, And forms the X-steel bar portion 20. Since the X-steel rods 20 are disposed on the ceiling portion 3 of the arcuate structure 1, the pair of steel rope tensions 21 and 23 are arranged on the left and right sides of the ceiling portion 3 Are located on (above) the two segmented segments 10 disposed in the respective diagonally opposite directions. More specifically, the first steel bar thickening material 21 disposed upward of the pair of steel bar tensions 21, 23 is formed on a pair of two-segment segments 10 arranged in the first diagonal direction, The second steel bar tension member 23 disposed on the downward side of the pair of steel bar tension members 21 and 23 is disposed on a pair of the two segment segments 10 arranged on the second diagonal direction. Here, the diagonal direction means a direction tilted at a predetermined angle with respect to the transverse direction or the longitudinal direction, and the second diagonal direction means a direction intersecting the predetermined first diagonal direction with an "X "

On the other hand, the pair of rigid members 21, 23 are fixed by the rigid support portion 30 to be described later, so that a pair of two-segment segments 10 arranged in the first diagonal direction, At this time, a pair of bifurcated segments 10 arranged in the diagonal direction are strongly bound by the repulsive force against the tensile force acting on the rod-like members 21, 23 at this time. Here, since the repulsive force is the same as the vector of the forces acting in the lateral direction and the longitudinal direction, the pair of bifurcated segments 10 are simultaneously forced in the lateral direction and the longitudinal direction by the X- Lt; / RTI >

A plurality of X-steel rods 20 are arranged along the longitudinal direction, and each X-steel rod portion 20 includes four two-segmented segments 10a and 10b , 10c, and 10d can be connected to each other. That is, the first arcuate structure 1, which is one of the plurality of arcuate structures 1 arranged in the longitudinal direction, and the other second arcuate structure 1 in contact therewith are supported by the first X- And a plurality of X-steel rods 20 are bonded in such a manner that the second arcuate structure 1 and another third arcuate structure 1 in contact therewith are bound by the second X-steel rods 20 Thereby connecting a plurality of arcuate structures 1 to each other.

However, the four bifurcated segments 10 to which the X-bar portion 20 is bound need not necessarily be the bifurcated segments 10 constituting the two arcuate structures 1 which are adjacent to each other. Therefore, it can be arranged in various forms in consideration of the size and weight of the arcuate structure 1, the shape in which the structures are arranged in the longitudinal direction, and the like. For example, when one X-steel bar 20 binds (not shown) or one X-steel bar 20 to the first arcuate structure 1 and the third arcuate structure 1, One of the steel bar tensions 21 and 23 constituting the first arcuate structure 1 and the second arcuate structure 1 constituting the first arcuate structure 1 and the other two bar segments 21, 23 may bind the second arcuate structure 1 and another pair of two-segment segments 10 constituting the third arcuate structure 1 (not shown).

The X-steel bar portion 20 thus arranged is connected to the two-segment segment 10 by the steel bar supporting portion 30. [

The steel bar supporting portion 30 is a device formed to fix one end of the steel bar tensions 21 and 23 to support the X-steel bar portion 20. The steel bar supporting portion 30 includes two segment segments 10 . Thus, it can be placed in each of the two segmented segments 10 arranged in both the transverse and longitudinal directions, or alternatively it can be placed in some two-segmented segments 10 which need to be bound.

On the other hand, the steel bar supporting portion 30 fixes one end of each of the different steel bar tensions 21a and 23b. When the plurality of X-steel bar portions 20 are continuously arranged along the longitudinal direction, 23a of the first X-steel bar 20a and the ends of any one of the bar-bar thickening materials 21b, 23b of the second X-steel bar 20b in a one-to-one correspondence .

Since the steel bar supporting portion 30 is an apparatus for mutually fixing the two segment segments 10 before integrating the two segment segments 10 through concrete pouring or the like, And is removed when the integration process is completed. Here, the material of the steel bar supporting portion 30 is not particularly limited as long as it can fix the X-steel bar portion 20, and may be formed of, for example, concrete, for example.

Hereinafter, a specific configuration of the steel bar supporting portion 30 according to the embodiment of the present invention will be described.

Fig. 3 is a perspective view of the steel bar supporting portion 30 shown in Figs. 1 and 2, and Fig. 4 is a perspective view of the X-steel bar portion 20 shown in Fig.

3, the steel bar supporting portion 30 according to the present invention includes a main body 31, a support base 32, a pair of connection shafts 33, a pair of fixing portions 34, 35).

Here, the main body 31 is a member arranged upwardly spaced from the upper surface of the two segmented segment 10, and the support table 32, the connecting shaft 33, and the fixing portion 34 are connected and assembled thereto. The main body 31 may be formed in a plate shape so that the support base 32 and the connection shaft 33 are easily disposed. But it is not necessarily formed as a whole.

The support base 32 is a member formed to support the main body 31 and is arranged to protrude from the upper surface of the two-segmented segment 10. The support 32 may be detachably coupled to the two-segment segment 10 and may be configured as an anchor that is removably inserted and fixed in the insertion hole drilled on the upper surface of the two-segment segment 10 .

At this time, the main body 31 is coupled to the free end of the support base 32. At this time, the free end of the support base 32 passes through the main body 31, and a pair of nuts It is possible to support the main body 31 in such a manner that the main body 31 is screwed to the end. However, the manner in which the support base 32 and the main body 31 are combined is not necessarily required, but may be combined by any known coupling means.

Further, the number of the support rods 32 need not be limited as long as the support rods 32 can stably support the main body 31. [ Since the steel bar supporter 30 is required to fix the steel bar tensions 21a and 23a which are tilted in the diagonal direction, the arrangement of the support bar 32 is required to stably support the main body 31 against an external force acting in the diagonal direction. It is preferable to determine the direction. For example, in the case of using the plate-like main body 31, a plurality of support rods 32 can be provided along the edge of the main body 31.

The pair of connection shafts 33 are formed to extend upwardly and downwardly from the outer surface of the main body 31 one by one. For example, in the case of the plate-like body 31, a connection shaft 33 may be formed on the upper and lower surfaces thereof. In each of the connecting shafts 33, a fixing portion 34 for fixing the steel bar constants 21a and 23b constituting the X-steel bar portions 23a and 23b (see FIG. 2) one by one is coupled one-to-one. Therefore, in order to reinforce the connection shaft 33, an external force due to the tension of the rigid members 21a, 23b acts in the direction perpendicular to the connection shaft 33, May be additionally combined.

The fixing portion 34 is formed in a block shape and includes a through hole which is rotatably coupled to each of the pair of connection shafts 33 and penetrates in a direction perpendicular to the longitudinal direction of the connection shaft 33 . Here, the block shape does not mean a specific shape, but means a predetermined shape having a thickness or width capable of forming a through hole, and therefore the scope of the right is not limited by the shape.

In the through hole, one end of the rod-like tension members (21a, 23b) constituting the different X-rod portions (23a, 23b, see FIG. 2) is inserted and fixed. Therefore, in the fixed portion 34 which is coupled to the connection shaft 33 protruded upwardly and arranged upward, the steel bar tension member 21a disposed upward from any one of the X-steel bar portions 20a is protruded downward The fixing rod 34 is connected to the connecting shaft 33 and fixed to the fixing part 34 in a downward direction. The fixing rod 34 is fixed to the other X-steel rod part 20b.

Here, the fixing portion 34 is rotatably coupled to the connection shaft 33, and one end of the rigid tension members 21a and 23b is easily inserted, It is possible to arrange the steel bar tensions 21a and 23b in a desired diagonal direction by rotating at this angle. On the other hand, when the connection shaft 33 extends from the central portion of the main body 31 and a plurality of support rods 32 are coupled along the edge of the main body 31, Which are pivoted between the opposed supports 32. Therefore, the mounting position of the support table 32 is determined so that the range of rotation of the steel bar tension member 23b is not too limited by the support table 32. [

The coupling between the fixing portion 34 and the coupling shaft 33 may be, for example, a screw coupling. Therefore, the fixing portion 34 is rotatable in the direction in which it is locked or unlocked around the connection shaft 33. It should be noted that the fixing portion 34 is not necessarily screwed to the connecting shaft 33 and is not necessarily pivoted but may be formed in any known structure so long as the fixing portion 34 can be rotatably coupled to the connecting shaft 33. [ .

On the other hand, the tension nut 35 is a nut that is coupled to the steel bar tensions 21a and 23b to tense the steel bar tensions 21a and 23b. The tension nut 35 is screwed to one end of the rod-like tension members 21a and 23b penetrating the fixing portion 34. The tension nut 35 is rotated in the locked direction until it is brought into close contact with the outer surface of the fixing portion 34 , And tensions the steel bar tension members (21a, 23b) by a repulsive force generated when the bar is rotated in the locking direction.

Hereinafter, the present invention will be described with reference to FIG. 4, in which a plurality of X-steel rods 20 (see FIG. 2) are arranged by the steel bar supporting portion 30. FIG.

In the present embodiment, the plurality of bifurcated segments 10 are fixed in the transverse and longitudinal directions by fixing the plurality of X-steel rods 20 and the steel bar supporting portion 30 mounted on each of them. Here, the four bifurcated segments 10 constituting the two adjoining arcuate structures 1 are divided into a first two-segment segment 10a, a second two-segment segment 10b, a third two-segment segment 10c, The fourth bar segment 10d is provided with a first bar support portion 30a, a second bar support portion 30b, a third bar support portion 30c, and a fourth bar support portion 30b, (30d). At this time, one steel bar tension member 23a is fixed to the fixed portion 34 disposed on the downward side of the first bar support portion 30a and the fourth bar support portion 30d facing each other and the second bar support member 30b And the other fixed bar portion 21a is disposed in the fixed portion 34 disposed on the upper side of each of the third bar support portion 30c and the third bar support portion 30c to constitute one X- On the other hand, in the fixing portion 34 disposed on the upper side of the fourth steel bar supporting portion 30d, another steel bar thickening material 21b of another X-steel bar portion 20 is arranged on the lower side of the second steel bar supporting portion 30b And the other steel rod tension member 23b of the another X-steel bar portion 20 is fixed to the portion 34. [

Accordingly, a plurality of X-steel rods 20 are arranged along the longitudinal direction, and among the X-steel rods 20 adjacent to each other, upwardly disposed steel rods 21a and 21b are arranged on a virtual coplanar surface And the downwardly disposed steel bar tensions 23a and 23b are arranged side by side in such a manner that they are arranged on another imaginary coplanar surface.

5 to 6 are perspective views of a two-segment precast concrete arch system according to another embodiment of the present invention.

5 to 6, the steel bar supporting part 300 of the two-segment precast concrete arch system according to another embodiment of the present invention is formed into a block shape that extends and protrudes from the upper surface of the two-segment segment 10 . At this time, the steel bar supporting part 300 may be formed of concrete, and may be integrally formed with the two-segment segment 10. [ However, since it is not necessarily formed integrally, it may be manufactured in the form of a concrete block and then mounted on the two-segmented segment 10 as required. On the other hand, the support rod 300 has a pair of through holes 310. Here, one of the pair of through holes 310 is arranged in an upward direction and the other is arranged in a downward direction and is vertically arranged so that one of the through holes 310 is crossed in an "X "

One end of each of the rigid members 21, 23 is inserted into each of the through holes 310 formed as described above. That is, the first steel bar tensions 21 are inserted into the insertion holes 310 disposed at the upper side of each of the pair of steel bar supporting portions 300a arranged in the first diagonal direction, Are inserted into the insertion holes 310 arranged in the downward direction of each of the pair of the steel bar supporting portions 300b arranged in the diagonal direction. Therefore, the first and second steel bar thickeners 21 and 23 intersect in an "X " shape while being arranged vertically on the ceiling portion of the arcuate structure. At this time, the steel bar tensions 21, 23 can be fixed and strained by the tension nuts 35 (see Fig. 3) described above.

7 is an enlarged cross-sectional view of the circle A in Fig.

7, the two-segmented segment 10 according to the present invention may include a body portion 11 and a joint portion 13. As shown in FIG. The joint portion (13) protrudes in a plate shape from the lower end of the one end of the body portion (11). 1) of the arcuate structure 1 is formed in the upper part of the ceiling part 3 (see Fig. 1) The concaved copper work 5 is prepared.

In the copper rods 5, the reinforcing rods 40 are arranged so as to bind the two-segmented segments 10 tangentially in the transverse direction. At this time, the reinforcing bar 40 may be a mechanically joined reinforcing bar using a coupler 45. Further, by placing the concrete in the copper spindle 5, the bound two-segment segment 10 can be tightened.

In general, according to the present invention, among the two-segmented segments 10 arranged in a longitudinal direction and forming a pair of arcuate structures 1 in a pair at a ceiling portion 3 in a transverse direction, 10 are connected by steel bar tensions 21, 23 arranged in an "X" shape so that the two segmented segments 10 are mutually fixed transversely and longitudinally prior to concrete pouring, can do.

Hereinafter, a construction method of a two-segment precast concrete arch system according to the present invention will be described.

8 to 9 are process drawings of a method of constructing a two-segment precast concrete arch system according to the present invention.

8, a method of constructing a two-segment precast concrete arch system according to the present invention comprises the steps of: (a) providing a pair of two-segmented segments 10 constructed in a precasting manner, A step (S100) of continuously arranging the arcuate structure 1 in the longitudinal direction to form the arched structure 1 by abutting against each other, (b) mounting the steel bar supporting portion 30 on the upper surface of the two segmented segment 10 so as to be detachable (C) the first steel bar tensions 21 are connected to a pair of steel bar supporting portions 30a arranged in the first diagonal direction and the second steel bar tensions 23 are connected to the first steel bar tensions And a step (S300) of vertically arranging the upper and lower portions on the ceiling surface of the upper portion and the upper portion of the upper portion, and crossing the upper and lower portions in an "X" shape and connecting them to a pair of steel rod supporting portions 30b arranged in the second diagonal direction.

The present invention relates to a method of constructing a two-segment precast concrete arch system as described above, and a two-segment precast concrete arch system according to the present invention can be constructed according to the following construction method. Here, redundant descriptions of the above-described two-segment precast concrete arch system will be omitted or simply described.

In order to construct the two-segment precast concrete arch system according to the present invention, a plurality of two-segmented segments 10, one pair of which are laterally adjacent to each other at the ceiling portion to form the arcuate structure 1, are arranged in the lateral direction and the longitudinal direction , And the arcuate structures 1 are continuously arranged (S100).

When the arcuate structures 1 are arranged, the steel bar supporting portions 30 are detachably mounted on the upper surfaces of the two-segment segments 10 to be coupled with each other (S200). At this time, the pair of steel bar supporting portions 30 arranged in the diagonal direction are arranged so as to face each other.

9, the inserting hole 15 is first drilled on the upper surface of the two segmented segments 10a and 10b to which the steel bar supporting portion 30 is to be attached, and the support bar 32 Is inserted into the insertion hole 15 and fixed. Then, the other end of the support base 32 and the main body 31 are engaged. At this time, the other end of the supporter 32 may be passed through the main body 31, and a pair of nuts may be screwed to the supporter 32 with the main body 31 interposed therebetween to fix the main body 31. However, the coupling between the support base 32 and the main body 31 may be combined in other ways. Finally, the fixing rod 34 is rotatably coupled to a pair of connecting shafts 33 protruding upward and downward from the main body 31, respectively, to mount the rod supporting portion 30. [

Next, the first and second steel bar tensions 21 and 23 are crossed in an "X " shape and connected to the two pairs of steel bar supporting portions 30a and 30b arranged in the diagonal direction, respectively (S300). Concretely, the first steel bar tensions 21 are connected to the pair of steel bar supporting portions 30a arranged in the first diagonal direction and the second steel bar tension members 23 are fixed on the ceiling portion of the arcuate structure 1, And is connected to a pair of steel bar supporting portions 30b arranged in the second diagonal direction. As a result, the rod-like tensile members 21 and 23 are connected to the two-segmented segment 10 arranged in the diagonal direction.

At this time, the X-steel bar portion 20 (see Fig. 2) in which a pair of steel bar tensions 21 and 23 are arranged in an X-shape is divided into four bifurcated segments constituting two arcuate structures 1 adjacent to each other 10 may be arranged along the longitudinal direction while connecting them in the diagonal direction.

On the other hand, in the state where the steel bar tensions 21 and 23 are inserted into the fixed portion 34 of the steel bar supporting portion 30, 35, see Fig. 3), and tightening the tightening members 21, 23 by using the repulsive force generated when the fixing members 34 come into close contact with the fixing member 34 by tightening them.

When the two segment segments 10a and 10b are bound in the transverse direction and the longitudinal direction by the steel bar tensions 21 and 23 arranged in the "X" shape in this manner, the two segment segments 10a and 10b are tightened (S400). At this time, in the rigid coupling, a joining portion 13 protruding in a plate shape is formed on the lower side of one end of the two segmented segments 10a and 10b contacting in the transverse direction, The concrete 50 may be poured into the concrete pavement.

According to another embodiment of the present invention, there is provided a method of constructing a two-segment pre-grouted concrete arch system using a two-segment segment having a protruding reinforced concrete rod-like rod support portion, comprising the steps of: (a) (B) sequentially arranging the arcuate structures in a longitudinal direction by contacting a pair of the two-segment segments formed in the pre-casting method with the supporting portions formed in abutment with each other in the transverse direction at the ceiling portion; A pair of through-holes penetrating in an "X " -shaped shape is formed in the steel bar supporting portion, and the first steel bar tension member is inserted into the insertion hole disposed in the upward direction of each of the pair of steel bar supporting portions arranged in the first diagonal direction And the second steel bar tension members are vertically arranged on the top of the first steel bar tension member and on the top of the ceiling section, And a step of fixing the insert in the insert holes disposed on each of the support rod downwardly.

In order to construct a two-segmented prestressed concrete arch system (see FIGS. 5 to 6) using a two-segmented segment in which a steel rod support in the form of a concrete block is extended and protruded, a plurality of two-segmented segments 10 are first horizontally And arranged in the longitudinal direction to continuously arrange the arcuate structures.

Next, the first steel bar tensions 21 are inserted into the insertion holes 310 disposed at the upper side of each of the pair of steel bar supporting portions 300a arranged in the first diagonal direction, and the second steel bar tensions 23 Is inserted into the insertion hole 310 disposed in the downward direction of each of the pair of the steel bar supporting portions 300b arranged in the diagonal direction. At this time, the first bar thickening material 21 and the second bar thickening material 23 are arranged vertically on the ceiling portion of the arcuate structure and cross in an "X " shape.

Finally, a tightening nut 35 (see Fig. 3) is screwed to the rod tightening members 21, 23 to fix and tighten the rod tightening members 21, 23. Thereby, the two segmented segments 10 are fixed and fixed simultaneously in the transverse and longitudinal directions.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification or improvement is possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: arched structure 3: ceiling
5: Donghak 10: 2 segments Segment
11: main body part 13:
20: X-steel rod portion 21, 23: Steel rod tension member
30: a steel rod supporting part 31:
32: support member 33: connection shaft
34: Fixed portion 35: Tension nut
36: rib 40: reinforcing bar
50: Concrete

Claims (14)

A plurality of bifurcated segments fabricated in a precasting fashion, wherein a pair of the bifurcated segments form an arcuate structure in abutment with each other in the transverse direction at the ceiling portion and are arranged to each other in the longitudinal direction;
And a pair of steel bar tensions arranged vertically on the ceiling part and crossing in an "X " shape, and each of the steel bar tensions comprises a pair of two-segment segments arranged in a diagonal direction X-steel rods; And
And a steel bar supporting part detachably mounted on the two segmented segment and fixing one end of the steel bar tension member and supporting the X-
Wherein the X-steel bar portion and the steel bar support portion temporarily support a plurality of the bifurcated segments during installation of the bifurcated segment.
The method according to claim 1,
The X-
A two-segment precast concrete arch system in which a plurality of segments are arranged along a longitudinal direction while connecting the four segments in a diagonal direction to each other, the two segments being two arcuate structures adjacent to each other.
The method according to claim 1,
The above-
Two - segment precast concrete arch system formed by concrete.
The method according to claim 1,
The above-
A body spaced upwardly from an upper surface of the bifurcated segment;
A support disposed to protrude from an upper surface of the bifurcated segment and to support the body;
A pair of connection shafts protruding upward and downward from the outer surface of the main body;
A pair of fixing parts formed in a block shape and rotatably coupled to each of the pair of connection shafts and having a through hole for inserting and fixing the rigging member; And
A tension nut screwed on one end of the rod-like tension member passing through the fixing portion and tensing the rod-shaped tension member with a repulsive force generated when the rod is tightly fixed to the fixed portion;
A pre-cast concrete arch system.
The method of claim 4,
The above-
The main body is formed in a plate shape,
The connection shaft is formed on the upper surface and the lower surface of the main body,
The fixing portion is screwed to the connection shaft,
A rib coupled to an outer surface of the connecting shaft;
And a second pre-cast concrete arch system further comprising:
The method of claim 4,
The first steel bar tensions disposed upward of the X-steel bar portion are fixed to the fixing portions respectively disposed on the upward sides of the pair of the steel bar supporting portions facing each other in the first diagonal direction,
Wherein the second steel bar tensions disposed on the downward side of the X-steel bar portion include two segments fixed to the fixing portion, respectively, disposed on the downward sides of the pair of the steel bar supporting portions facing each other in the second diagonal direction intersecting with the first diagonal direction, Precast Concrete Arch System.
The method according to claim 1,
A joint portion protruding in the form of a plate is formed on the lower side of one end of the two segmented segments which are in contact with each other in the transverse direction so as to have a concave portion recessed in the upper portion of the ceiling portion,
A reinforcing bar disposed in the window and connecting the two segment segments tangentially in a lateral direction; And
Concrete poured into the copper rod;
And a second pre-cast concrete arch system further comprising:
The method of claim 3,
The above-
Wherein the bifurcated segment is formed in a block shape extending from the upper surface of the bifurcated segment,
And a pair of through holes through which the one ends of the steel bar tendons are inserted so as to cross each other in an "X" shape.
(a) continuously arranging the arcuate structures in a longitudinal direction by abutting one pair of the two-segment segments manufactured by the pre-casting method in the transverse direction at the ceiling portion to form an arcuate structure;
(b) attaching a steel bar support detachably to an upper surface of the bifurcated segment; And
(c) connecting the first steel bar tensions to a pair of steel bar supports arranged in the first diagonal direction, and arranging the second steel bar tensions on the top of the first steel bar tensions and the ceiling top, To a pair of steel bar supports arranged in a second diagonal direction;
The method comprising the steps of:
The method of claim 9,
The step (b)
Puncturing the inserting hole on the upper surface of the bifurcated segment;
Inserting and fixing one end of a support within the insertion hole;
Fixing a main body having a pair of connection shafts protruding upwardly and downwardly on the other end of the support frame; And
Coupling a fixed portion having a through hole into which the rod-like tension member is inserted, to each of the pair of connection shafts in a rotatable manner;
The method comprising the steps of: providing a pre-cast concrete arch system;
The method of claim 9,
In the step (c)
The X-steel bar portion in which the steel bar tensions are arranged in an X-shape is formed by connecting four bipartite segments constituting two arcuate structures adjacent to each other in a diagonal direction, Cast concrete arch system construction method.
The method of claim 10,
In the step (c)
Screwing and tightening a tension nut on both ends of each of the rod rods through the roots to strain the rod rods;
The method comprising the steps of: providing a pre-cast concrete arch system;
The method of claim 9,
After the step (c)
Placing the concrete in the upper portion of the ceiling portion having a joint portion protruding in the form of a plate at a lower side of one end of the two-segmented segments contacting each other in a lateral direction;
The method comprising the steps of: providing a pre-cast concrete arch system;
(a) a plurality of bifurcated segments formed by a pre-casting method in which a pair of bar-shaped support rods extending from the upper surface are extended and protruded, a pair of the bifurcated segments abutting each other laterally in the ceiling portion to form an arcuate structure, Sequentially arranging the structures; And
(b) a pair of through-holes penetrating in such a manner as to cross each other in an "X" -shaped manner is formed in the steel bar supporting portion, and the first steel bar tension member is disposed on the upper side of each of the pair of steel bar supporting portions arranged in the first diagonal direction And a second steel bar tension member is vertically arranged on the top of the first steel bar tension member and on the top of the ceiling portion so as to cross each other in an "X" Inserting and fixing the through-holes in the through-holes disposed at the downward sides of the respective strong-bar supporting portions;
The method comprising the steps of:

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