KR20170040098A - Apparatus for maintaining the distance between steel reinforcements installed in a prestressed concrete pole manufactured by the method using centrifugal force - Google Patents

Abstract

The present invention relates to an apparatus for maintaining distance between rebars installed in a rebar net of a centrifugal forming prestressed concrete pole. The apparatus for maintaining distance between rebars prevents reinforcing bars from being displaced or moved during centrifugal forming of a prestressed concrete pole by keeping the reinforcing bars in close contact with spiral rebars, and constantly maintains distance between the rebar net and a mold.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for maintaining a spacing of reinforcing bars installed in a reinforcing net of a prestressed concrete electric pole,

The present invention relates to a reinforcing bar retaining device and more particularly to a reinforcing bar retaining device for preventing a reinforcement bar from being displaced or moved during centrifugal molding of a prestressed concrete pole by making a reinforcing bar closely contact with a spiral reinforcing bar, In order to maintain the spacing of the reinforcing bars.

Generally speaking, a pole is a column built to extend a wire or a communication line.

Among these poles, a prismatic prestressed concrete pole is manufactured by installing a reinforcing net inside a mold, applying a prestress to a tensile root, rotating the mold, and injecting the concrete into the mold.

During the centrifugal molding, the reinforcing bar installed inside the mold may be displaced or moved due to the centrifugal force, the weight of the inserted concrete, impact, and the like. Among the tension roots and reinforcing rods constituting the reinforcing net, the tension roots are fixed to the tension device and the tensile force is applied. Therefore, the possibility of disengagement and movement of the tension roots is small. However, since the reinforcing rods are simply joined to the spiral rods There is a problem in that there is a large possibility of deviation and movement of the position.

As described above, when the reinforcement rope is displaced or moved, the bending strength is difficult to satisfy the reference value (KS F4304) and the bending strength is different according to the direction, and a safety accident may occur when a large external load such as a typhoon or an earthquake acts after the construction .

In order to solve such a problem, a reinforcing net gap has been proposed. The reinforcing net spacing is disclosed in Korean Patent Registration No. 1279609, Design Registration No. 727874, and the like.

However, although the gap between the mold and the reinforcing net can be maintained constant, the reinforcing net spacing member can not prevent the reinforcing bars (rebar) from moving toward the center of the mold, and the interval between the reinforcing bars, There is a problem that the interval between the tension roots can not be kept constant.

The present invention has been proposed in order to solve the above problems, and it is an object of the present invention to prevent the reinforcing bars from being displaced or shifted during centrifugal molding of the prestressed concrete pole by making the reinforcing bars come into close contact with the spiral reinforcing bars, And maintains a constant distance between the reinforcing bar net and the mold.

The reinforcing bar spacing apparatus 100 according to the first and second embodiments of the present invention includes a first unit 110 and a second unit 150.

The first unit 110 includes: a gap adjusting bar 120 formed along a longitudinal direction thereof; And a first reinforcing bar 130 formed at one end of the gap adjusting bar 120. The gap adjusting bar 120 is made of a material having an elastic restoring force.

The second unit 150 includes a through hole 160 into which the interval adjusting base 120 can be inserted; And a second reinforcing bar fixing part (180) formed integrally with the through hole (160).

The gap adjusting part 120 is inserted into the through hole 160 so that the first and second units 110 and 150 are fastened to each other. The reinforcing bars 3 are inserted and fixed to the first and second reinforcing bars 130 and 180 while the reinforcing bar 1 is in contact with the lower surface of the gap adjusting bar 120, Accordingly, the first and second reinforcing bars 130 and 180 apply a pushing force to the reinforcing bar 3 outwardly of the reinforcing bar, so that the displacement and displacement of the reinforcing bars 3 can be prevented.

It is preferable that the reinforcing bars 1 are tensioned ropes to which tension is applied while both ends of the reinforcing bars 1 are fixed to the reinforcing bar tensioning device, and the reinforcing bar 3 is a reinforcing bar to which no tension is applied.

The first reinforcing bar 130 includes a seating part 132 provided at one end of the gap adjusting bar 120 and having an inlet 133 opened; And a guide portion 136 formed to be inclined toward the inlet 133 so as to cover a part of the inlet 133 and having a predetermined elastic restoring force.

The second reinforcing bar fixing portion 180 includes a seating portion 182 formed under the through hole 160 and having an opening portion 183 opened; And a guide portion 186 formed to cover a part of the inlet 183 and having a predetermined elastic restoring force. The guide portions 136 and 186 are bent when the reinforcing bars 3 are inserted so that the reinforcing bars 3 can be inserted into the seating portions 132 and 182. After the insertion, ) And to support the reinforcing bars (3).

At least one of the upper surface and the lower surface of the gap adjusting member 120 may include a non-slip part 123. In the non-slip portion 123, mountains and valleys are alternately and repeatedly formed. The end of the stopper 170 may be fixed to the valley when the gap adjusting member 120 is installed to penetrate the through hole 160. Accordingly, the gap adjusting member 120 may be fixed.

Protruding pillars 135 and 165 protruding upward at a predetermined height may be provided on the upper surface of the first reinforcing steel fixing part 130 or the upper end surface of the gap adjusting part 120 and the upper part of the second unit 150 have. The projecting pillars 135 and 165 maintain a constant spacing between the mold and the reinforcing net.

The apparatus 300 for retaining spacers according to the third embodiment of the present invention includes: a main body 310 formed in a longitudinal direction; And a reinforcing bar fixing part 350 formed on the lower surface of the main body 310. [ The main body 310 is made of a material having elastic restoring force, and has an arc shape having a curvature radius smaller than that of the circular shape.

The reinforcing bar fixing portion 350 includes a seating portion 352 formed in the main body 310 and having an opening at an inlet portion 353; And a guide portion 356 formed to cover a part of the inlet 353 and having a predetermined elastic restoring force. The guide portion 356 is bent when the reinforcing bar 3 is inserted so that the reinforcing bar 3 can be inserted into the seating portion 352. After the insertion, the reinforcing bar 3 is returned to its original shape, And supports the reinforcing bar (3).

The reinforcing bar 3 is inserted and fixed to the reinforcing bar fixing portion 350 in a state where the reinforcing bars 1 are in contact with the lower surfaces of both sides of the main body 310 so that the main body 310 is stretched to have a radius of curvature larger than the original radius of curvature , So that the reinforcing bar fixing part (350) applies a pushing force to the reinforcing bar (3) outwardly of the reinforcing bar.

The concave and convex portions 312 may be formed on the bottom surface of the main body 310. The irregular portion 312 is formed by repeatedly forming mountains and valleys alternately. The irregular portion 312 ensures that the distance between the reinforcing bars 1 and 3 is kept constant.

A protrusion column 320 may be formed on the upper surface of the main body 310. The protrusion pillars 320 may be formed at both ends of the main body 310 or both ends and the center of the main body 310 or may be formed at predetermined intervals in the main body 310. The protrusion pillars 320 serve to maintain a constant gap between the mold and the reinforcing bar.

The reinforcing bar retaining device according to the present invention prevents the reinforcement bars from being displaced or shifted during centrifugal molding of the prestressed concrete pavement by making the reinforcing bars closely contact with the spiral reinforcing bars so that the gap between the reinforcing bars and the tension rods is kept constant , So that the distance between the reinforcing net and the mold is kept constant.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical cross-sectional view showing a general centrifugally formed prestressed concrete pole.
FIG. 2A is a cross-sectional view taken along line AA 'of FIG. 1; FIG.
2B and 2C are cross-sectional views taken along line BB 'of FIG. 1;
FIG. 3 is a front view showing a reinforcing bar spacer according to the first embodiment of the present invention; FIG.
FIG. 4A is a front view showing the first unit of the reinforcing bar retaining device of FIG. 3; FIG.
Figure 4b is a top view of the first unit shown in Figure 4a.
Fig. 5A is a front view showing the second unit of the reinforcing bar retaining device of Fig. 3; Fig.
Fig. 5B is a right side view of the second unit shown in Fig. 5A. Fig.
6A is a view showing that a reinforcing bar retaining device is installed in a protruding portion (AA 'end face) of a reinforcing net.
FIG. 6B is a view showing concrete poured into the reinforcing net of FIG. 6A; FIG.
7A is a view showing that a reinforcing bar retaining device is installed at the center portion (BB 'end face) of a reinforcing net.
FIG. 7B is a view showing concrete poured into the reinforcing net of FIG. 7A; FIG.
FIG. 8 is a front view showing a reinforcing bar spacer according to a second embodiment of the present invention; FIG.
FIG. 9A is a front view showing the first unit of the reinforcing bar retaining device of FIG. 8; FIG.
FIG. 9B is a plan view of the first unit shown in FIG. 9A. FIG.
Fig. 10A is a front view showing the second unit of the reinforcing bar holding device of Fig. 8; Fig.
Fig. 10B is a right side view of the second unit shown in Fig. 10A. Fig.
FIG. 11A is a front view showing a reinforcing bar spacer according to a third embodiment of the present invention; FIG.
Fig. 11B is a plan view of the reinforcing bar spacing maintenance apparatus shown in Fig. 11A. Fig.
12 is a view showing that the reinforcing bar keeping device of Fig. 11A is installed in a circular part (AA 'end face); Fig.
Fig. 13 is a view showing that the reinforcing bar holding device of Fig. 11a is installed at the center portion (BB 'end face) of the electric pole. Fig.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely examples of the present invention and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

Hereinafter, the general configuration of the centrifugally formed prestressed concrete pole will be described first, and then the present invention will be described.

Centrifugal forming prestressed concrete poles include cylindrical concrete and reinforced net embedded in concrete. FIG. 1 is a vertical cross-sectional view showing the concrete pole, FIG. 2A is a sectional view taken along line A-A 'of FIG. 1, and FIGS. 2B and 2C are sectional views taken along a line B-B' of FIG. In FIG. 1, the illustration of the reinforcing net is omitted.

The electric pole (10) includes a concrete (7) and a reinforcing net embedded in the concrete (7). The electric pole 10 is manufactured to have a length of about 7 m to 17 m. Since the diameter of the lower end (usually referred to as a "circular hole") is larger than the diameter of the upper end (usually called " As shown in Fig.

The reinforcing net includes a tension rope (1), a reinforcing rope (3) and a spiral reinforcing bar (5). The tension roots (1) and the reinforcing rods (3) are arranged in a circular shape, and the outer portions thereof are joined to the helical bar (5) by spot welding or the like.

The tension roots 1 are installed so as to extend over the entire length of the pole 10 from the original to the end of the rope 10. The ends of the roots 1 are fixed to a tension device (not shown) (1).

The reinforcement rods 3 are installed only in a certain section from the original circle or are installed over the entire length depending on the physical properties (flexural strength, etc.) required for the electric pole 1. [ In addition, the spiral reinforcing bar 5 extends from the circular arc to the end of the arc so as to form a spiral along the longitudinal direction of the electric pole 10. The tension roots (1) and the reinforcing rods (3) are joined to the inner surface of the spiral reinforcing bar (5). Instead of the spiral reinforcing bar 5, a circular reinforcing bar (not shown) may be provided at predetermined intervals. Such a round reinforcing bar is disclosed in Korea Design Registration No. 369850, for example. In this specification and claims, 'helical bar' is used to mean both helical bar and circular bar. Therefore, the spiral reinforcing bar 5 should be interpreted to include not only the reinforcing bars provided along the longitudinal direction of the electric pole 10, but also the circular reinforcing bars provided at predetermined intervals along the longitudinal direction of the electric pole.

2A shows a cross section (A-A 'section) of the circular section, wherein it is seen that eight tension roots (1) and eight reinforcing rods (3) are alternately and repeatedly installed in the circle. FIG. 2B shows the cross section of the middle portion (B-B 'section). It can be seen that eight tension roots (1) and eight reinforcing rods (3) are alternately and repeatedly installed in the middle portion.

On the other hand, the length of the reinforcing bars 3 can be changed according to physical properties (flexural strength, etc.) required for the electric pole 10. That is, the reinforcing bars 3 may be installed to extend from the full circle to the full circle over the entire length of the pole, but may be provided only from the circle to a certain interval. 2C shows that a part of the reinforcing bars 3 is not present at the center portion (the BB 'end face). This is because some reinforcement rods 3 are laid only below the BB' This is because it has been laid out above the top.

First Embodiment

FIG. 3 is a front view showing a reinforcing bar keeping device according to a first embodiment of the present invention, FIG. 4A is a front view showing a first unit of the reinforcing bar keeping device, and FIG. 4B is a plan view of the first unit. Fig. 5A is a front view showing the second unit of the above-mentioned reinforcing bar keeping device, and Fig. 5B is a right side view of the second unit.

As shown in the figure, the apparatus 100 for retaining spacers includes a first unit 110 and a second unit 150.

The first unit 110 includes a gap adjusting bar 120 formed along the longitudinal direction of the first unit 110 and a first reinforcing bar 130 formed at one end of the gap adjusting bar 120.

와 같은 횡단면 형상을 갖는다.The gap adjusting member 120 has an elastic restoring force of a predetermined magnitude. When the external force is exerted, the gap adjusting member 120 is straightened. When the external force is applied, the gap adjusting member 120 is bent toward the external force. In order to have such an elastic restoring force, the gap adjusting member 120 may be made of plastic or metal. Then, the gap adjusting base 120

Sectional shape.

The spacer 120 is inserted into the through hole 160 of the second unit 150 and then fixed. The slope 121 may be formed on the other end of the gap adjusting bar 120 so that the insertion can be easily performed. The inclined portion 121 can be made by folding the tip end portion of the gap adjusting base 120 at an acute angle.

The non-skid portion 123 may be formed on the upper surface of the gap adjusting base 120. The non-slip portion 123 is a portion in which mountains and valleys are alternately repeatedly formed along the longitudinal direction of the interval adjusting base 120. The stopper 170 of the second unit 150 is fixed to the valley of the non-slip part 123 after the spacer 120 is inserted into the through hole 160, have. Therefore, the insertion length of the gap adjusting part 120 can be adjusted corresponding to the interval between the reinforcing bars 1 and 3, and after the insertion, the gap adjusting part 120 can be fixed by the stopper 170 have.

The first reinforcing bar 130 is formed at one end of the first unit 110 and includes a seating part 132 and a guide part 136.

The seating portion 132 preferably has a circular shape, for example, a C shape in which the opening 133 is opened, where the reinforcing bars (for example, the reinforcing bars 3) are seated. When the reinforcing bar spacing device 100 is installed in the reinforcing bar net, the seating portion 132 applies upward pushing force to the reinforcing bar 3 (reinforcing bar). Therefore, it is preferable that the seating portion 132 has its inlet 133 formed on the side surface and its lower portion sealed. In order to increase the pushing force, a reinforcing rib 134 may be formed on the outer peripheral surface of the seating part 132.

The guide portion 136 is formed to be inclined toward the inlet 133 so as to cover a part of the inlet 133, and has a predetermined elastic restoring force. When the reinforcing bar 3 is inserted into the seating portion 132, the reinforcing bar 3 is placed on the seating portion 132 through the inlet 133 while the guide portion 136 is laid down. When the reinforcing bar 3 is inserted into the seating portion 132, The guide portion 136 is returned to its original shape and the inlet 133 is blocked so that the reinforcing bar 3 is not released.

Although only one guide part 136 is formed on one side of the inlet 133 in the figure, the guide part 136 may be formed on both sides of the inlet 133. In this case, And is inserted into the seating part 132 while pushing.

A protruding post 135 may be provided on the upper surface of the first reinforcing bar 130. The protrusive pillar 135 protrudes upward at a predetermined height from the upper surface of the first reinforcing steel fixing part 130 and serves to adjust the distance between the reinforcing steel net and the mold (not shown). Therefore, the thickness of the concrete 7 to be coated around the reinforcing net is determined according to the height of the protruding pillars 135.

The protrusion pillars 135 may be provided not at the upper surface of the first reinforcing steel fixing part 130 but at one end or one side of the interval adjusting part 120.

The second unit 150 includes a through hole 160 into which the gap adjusting member 120 can be inserted, a second reinforcing steel fixing part 180 formed integrally with the through hole 160, A stopper 170 formed on one side, and a protruding post 165.

형상)을 갖는다. The through hole 160 is a hole into which the gap adjusting member 120 is inserted and has a cross-sectional shape corresponding to the cross-sectional shape of the gap adjusting member 120 (for example,

Shape).

The second reinforcing bar 180 is formed under the through-hole 160. The second reinforcing bar fixing portion 180 includes a seating portion 182 having an opening 183 formed therein and a guide portion 183 formed to be inclined toward the inlet 183 to cover a portion of the inlet 183, (186).

The seating portion 182 has an arc-shaped groove so that the reinforcing bars 3 (reinforcing bars) can be seated. The two guide portions 186 prevent and support the deviation of the reinforcing bars 3 seated on the seating portions 182.

The second reinforcing bar fixing part 180 applies upward pushing force to the reinforcing bars 3 when the reinforcing bar spacing device 100 is installed in the reinforcing bar net. 3, the reinforcing bars) are pushed upward to be brought into close contact with the spiral reinforcing bars 5, thereby preventing the displacement and displacement of the reinforcing bars 3 (reinforcing bars).

The stopper 170 is formed at one side of the through hole 160. The tip end portion of the stopper 170 is inserted and fixed in the valley of the non-slip part 123, thereby fixing the gap adjusting part 120. [ Preferably, the stopper 170 is a portion protruding in the 'a' shape from one side of the through hole 160. On the other hand, the stopper 170 may be formed on both sides (the inlet side and the outlet side) of the through hole 160.

The stopper 170 allows the interval adjusting bar 120 to move when the operator inserts the interval adjusting bar 120 into the through hole 160 to adjust the insertion length to match the interval between the bars, In the state where the external force is removed, the gap adjusting base 120 is fixed so that it can not move arbitrarily.

The projecting pillar 165 is a column formed to protrude from the top of the through hole 160, and serves to adjust the distance between the mold and the reinforcing net.

FIG. 6A shows that the gap holding device 100 is installed in the reinforcing net, and FIG. 6B shows that the concrete 7 is installed in the reinforcing net. In FIG. 6B, the concrete marking is omitted in order to make the spacer 100 visible.

6A and 6B, a reinforcing bar 3 located at one side of the tension rope 1 is inserted into the first reinforcing bar fixing portion 130 and a reinforcing bar 3 located at the other side of the tension rope 1 After inserting the spacer 120 into the through hole 160 and adjusting the insertion length to correspond to the distance between the reinforcing bars 3, the stopper 170 is inserted into the through hole 160, .

When the gap adjusting member 120 is inserted into the through hole 160, the gap adjusting member 120, which is a straight line, is bent to correspond to the circular curvature of the reinforcing net, And the first and second reinforcing bars 130 and 180 apply a pushing force to the reinforcing bars 3 toward the outside of the reinforcing bar. By this force, the reinforcing bars 3 are kept in a state of being in close contact with the spiral reinforcing bars 5, thereby preventing the reinforcing bars 3 from being separated or moved. On the other hand, as described above, since the tension roots 1 are coupled to the tension device at both ends thereof and are in a state in which a tensile force is applied, the tension roots 1 can not be released or removed even if they are subjected to external force (centrifugal force, centrifugal force, weight of concrete, The position movement is relatively small or hardly occurs.

On the other hand, although the structure in which the tension roots 1 and the reinforcing ropes 3 are alternately and repeatedly arranged is shown in the drawing, the arrangement of the tension roots 1 and the reinforcing rods 3 can be varied as needed. Even if the number of tension roots located on the lower surface of the gap adjusting bar 120 is increased or decreased or the concrete bar arrangement is varied, the gap adjusting bar 120 is bent around the tension roots 1, It is to be understood that the technical features of the present invention are applied to the structure in which the reinforcing bars 3 on both sides are brought into close contact with the helical bar 5 to prevent the displacement and displacement of the reinforcing bar 3.

FIG. 7A is a view showing that a reinforcing bar keeping device is installed at the center portion (B-B 'end face) of the reinforcing net, and FIG. 7B is a view showing that concrete is installed in the reinforcing net.

As described above, the reinforcing bars 3 are laid out from the original to the required height. In FIG. 7B, it can be seen that all the reinforcing bars (i.e., eight reinforcing bars) extend to the B-B 'cross section. Also, the tension roots 1 and the reinforcing ropes 3 are alternately and repeatedly arranged on the B-B 'cross section. However, since the diameter of the pole is relatively smaller than that of the circle, the interval between the reinforcing bars is narrower than that of the circle, so that the inserted length of the gap adjusting bar 120 is lengthened.

Second Embodiment

FIG. 8 is a front view showing a reinforcing bar keeping device according to a second embodiment of the present invention, FIG. 9A is a front view showing the first unit of the reinforcing bar keeping device, and FIG. 9B is a plan view of the first unit. FIG. 10A is a front view showing the second unit of the reinforcing bar keeping device, and FIG. 10B is a right side view of the second unit. FIG. 8 to 10B, the same reference numerals as in Figs. 1 to 7B denote the same elements.

The reinforced bar spacing device 200 includes a first unit 110 and a second unit 150.

The first unit 110 includes a gap adjusting bar 120 formed along the longitudinal direction of the first unit 110 and a first reinforcing bar 130 formed at one end of the gap adjusting bar 120. The second unit 150 includes a through hole 160 into which the interval adjusting bar 120 can be inserted, a second reinforcing bar fixing part 180 formed integrally with the through hole 160, a through hole 160 A stopper 170 formed on both sides of the protruding pillar 165, and a protruding pillar 165.

으로서 윗면의 중앙 부분이 양측 부분 보다 높게 형성되어 있고 상기 윗면 중앙 부분에 미끄럼 방지부(123)가 형성되어 있다는 점과, 제2 유닛(150)의 상단 및 양측 어깨 부분에 스토퍼(170)가 형성되어 있다는 점 및, 관통공(160)의 단면 형상이

이라는 점에서 다르다. The reinforcing bar spacing device 200 is different from the reinforcing bar spacing device 100 in that the non-slipping portions 123 are formed on both the upper and lower surfaces of the spacing bar 120, The cross-

A stopper 170 is formed at an upper end of the second unit 150 and at both shoulder portions of the second unit 150. The stopper 170 is formed at the lower end of the second unit 150, And that the cross-sectional shape of the through-hole 160 is

.

형상을 갖기 때문에 그 탄성 복원력이 철근 간격유지 장치(100)의 간격 조절대(120,

형상의 횡단면을 가짐) 보다 더 크다. 그리고, 미끄럼 방지부(123)가 간격 조절대(120)의 윗면과 아랫면에 모두 형성되어 있고, 상기 윗면과 아랫면의 미끄럼 방지부(123)에 대응되도록 스토퍼(170)가 제2 유닛(150)의 상단 및 어깨에 각각 형성되어 있으므로 간격 조절대(120)를 더 견고하게 고정한다. The reinforcing bar spacing device 200 has a cross section of the interval adjusting bar 120

The resilient restoring force of the resilient restoring force of the spacing adjusting bases 120,

Cross-section of the shape). The stopper 170 is formed on the upper surface and the lower surface of the gap adjusting member 120 so as to correspond to the non-skid portion 123 of the upper surface and the lower surface of the second unit 150, And the gap adjusting member 120 is fixed more firmly.

The structure (method) in which the reinforcing bar spacing device 200 is fastened to the reinforcing bar network and the process in which concrete is inserted after the reinforcing bar spacing device 200 is fastened to the reinforcing bar network, .

Third Embodiment

FIG. 11A is a front view showing a reinforcing bar spacing device according to a third embodiment of the present invention, and FIG. 11B is a plan view of the reinforcing bar spacing device. 11A and 11B, the same reference numerals as those in Figs. 1 to 10B denote the same components.

Referring to FIG. 3, the apparatus 300 includes a main body 310 formed in a lengthwise direction and a reinforcing bar fixing portion 350 formed at a central portion of the main body 310.

The main body 310 has an arc shape having a smaller radius of curvature than the circular shape of the reinforcing net. The main body 310 is made of a material having a predetermined elastic restoring force such as plastic (synthetic resin), metal, or the like. Therefore, when the reinforcing bar spacing device 300 is installed in the reinforcing bar net, the main body 310 is slightly extended and thus the elastic restoring force of the main body 310 acts, (3, reinforcing bars) are brought into close contact with the spiral reinforcing bars (5), and the reinforcing bars (1, tension roots) on both sides of the reinforcing bars (3) are subjected to a force directed toward the center of the reinforcing bars.

Preferably, protruding posts 320 are formed on the upper surfaces of both side ends of the main body 310. The structure and role of the projecting column 320 are substantially the same as the structure and role of the projecting column 135 described above. The protrusive pillars 320 may be formed at both side ends and the center of the main body 310 as well as at the opposite sides of the main body 310, or a plurality of protrusive pillars 320 may be formed on the upper surface of the main body 310 at predetermined intervals.

The upper and lower surfaces of the main body 310 may be provided with recesses and protrusions 312 repeatedly formed with mountains and valleys. The concave and convex portions 312 help increase the frictional force between the reinforcing bars 1 and the main body 310 to help maintain the spacing between the reinforcing bars 1 and 3 constant.

The reinforcing bar fixing part 350 includes a seating part 352 integrally formed with the main body 310 and having an opening 353 opened and a guide part 352 formed to cover a part of the inlet 353 and having a predetermined elastic restoring force (356). It is preferable that the reinforcing bar fixing portion 350 is formed at a central portion in the longitudinal direction of the main body 310.

The seating portion 352 has an arc-shaped groove such that the reinforcing bar 3 is stably seated. The guide portion 356 prevents the reinforcing bars 3 inserted in the seating portion 352 from being released to the outside and supports the reinforcing rods 3 so that the reinforcing rods 3 can support the reinforcing bars 3, (5).

Preferably, a semicircular rib portion 360 is formed on the upper surface of the central portion of the main body 310. The rib portion 360 functions as a protruding column and also serves to increase elastic restoring force. That is, the rib portion 360 maintains a constant distance between the mold and the reinforcing bar net, and increases the elastic restoring force of the main body 310 when the reinforcing bar spacing device 300 is installed in the reinforcing net, Reinforcing bars) to the spiral reinforcing bar (5).

On the other hand, Fig. 12 shows that the reinforcing bar spacing device is installed in the circular part (section A-A '). 12, the reinforcing bar spacing device 300 is different from the reinforcing bar spacing devices 100 and 200 in that the reinforcing bar 3 is inserted and fixed in the reinforcing bar fixing part 350, There is a difference in that the tension roots 1 disposed on both sides of the main body 310 are brought into contact with the lower surface of the main body 310. As a result, the reinforcement rope 3 receives a force in a direction tangential to the spiral reinforcing bar 5, and the tension roots 1 receive a force directed toward the center of the mold, .

On the other hand, the tension roots (1) are laid over the whole length of the pole from the original circle to the male roots, but the reinforcing rods (3) are laid only from the original circle to the required height. 2B shows that all of the eight reinforcing bars 3 extend to the BB 'end of the electric pole, and FIG. 2C shows that only four of the reinforcing bars 3 extend to the BB' (Fig. 2a), but the four bars extend only to the bottom of the B-B 'portion and only the remaining four extend above the BB' cross-section.

FIG. 13 shows a structure in which the reinforcing bar spacing device 300 is installed when only four reinforcement rods 3 are disposed on the B-B 'cross section. In this case, since the reinforcing bars 4 and the tension bars 8 are disposed on the B-B 'cross section, it can be seen that the reinforcing bar spacing device 300 can be more effectively applied than the reinforcing bar spacing devices 100 and 200.

1: Tension joint 3: Reinforcement
5: Helical Reinforcement 7: Concrete
10: Centrifugal forming prestressed concrete pole
100, 200, 300: Reinforcing spacer
110: first unit 120:
121: slope part 123: non-slip part
130: first reinforcing bars 132, 182, 352:
133, 183, 353: inlet 134: reinforcing rib
136, 186, 356: guide part 150: second unit
160: through-hole 135, 165, 320: protruding pole
170: stopper 180: second reinforcing bar portion
310: main body 312: concave /
350: Rebar fixing part 360: Rib part

Claims (7)

An apparatus for installing a reinforcing bar of a circular reinforcing bar and maintaining a gap between reinforcing bars, the reinforcing bar being installed in a circular reinforcing net embedded in a concrete pole,
The gap maintaining apparatus includes a first unit 110 and a second unit 150,
The first unit (110)
An interval adjusting base 120 formed along the longitudinal direction thereof; And
And a first reinforcing steel fixing part 130 formed at one end of the gap adjusting part 120. The spacing adjusting part 120 is made of a material having an elastic restoring force,
The second unit 150,
A through hole 160 into which the gap adjusting member 120 can be inserted; And
And a second reinforcing bar fixing part (180) integrally formed with the through hole (160)
The circular reinforcing net includes a spiral reinforcing bar 5 and a plurality of reinforcing bars 1 and 3. The reinforcing bars 1 and 3 are arranged in a circular shape and the outer portion of the reinforcing bars 1 and 3 is a spiral reinforcing bar 5,
The first and second units 110 and 150 are inserted into the through holes 160,
The reinforcing bars 3 are inserted and fixed to the first and second reinforcing bars 130 and 180 while the reinforcing bar 1 is in contact with the lower surface of the gap adjusting bar 120, And the first and second reinforcing bars 130 and 180 apply a pushing force to the reinforcing bars 3 outwardly of the reinforcing bars. The method according to claim 1,
The reinforcing bars (1) are tensioned ropes with both ends thereof fixed to the reinforcing tensioning device, and the reinforcing bars (3) are reinforcing rods without tensioning,
The first reinforcing bar fixing portion 130,
A seating part 132 provided at one end of the gap adjusting base 120 and having an opening of the inlet 133; And
And a guide portion (136) formed to be inclined toward the inlet (133) so as to cover a part of the inlet (133) and having a predetermined elastic restoring force,
The second reinforcing bar fixing portion (180)
A seating portion 182 formed under the through hole 160 and having an opening of the inlet portion 183; And
And a guide part (186) formed to close a part of the inlet (183) and having a predetermined elastic restoring force,
The guide portions 136 and 186 are bent when the reinforcing bars 3 are inserted so that the reinforcing bars 3 can be inserted into the seating portions 132 and 182. After the insertion, , And supports the reinforcing bars (3). 3. The method of claim 2,
At least one of the upper surface and the lower surface of the gap adjusting member 120 is provided with a non-skid portion 123. The non-skid portion 123 is alternately and repeatedly formed with a mountain and a bone,
The second unit 150 includes a stopper 170 formed on one side or both sides of the through hole 160. When the interval adjusting bar 120 is installed to pass through the through hole 160, And the spacer can be fixed to the valley, whereby the spacer 120 is fixed. 4. The method according to any one of claims 1 to 3,
Protruding pillars 135 and 165 projecting upward at a predetermined height are provided on the upper surface of the first reinforcing steel fixing part 130 or the upper end surface of the gap adjusting part 120 and the upper part of the second unit 150,
Wherein the projecting posts (135) and (165) maintain a constant distance between the mold and the reinforcing net. An apparatus for installing a reinforcing bar of a circular reinforcing bar and maintaining a gap between reinforcing bars, the reinforcing bar being installed in a circular reinforcing net embedded in a concrete pole,
A body 310 elongated in the longitudinal direction; And
And a reinforcing bar fixing part (350) formed on a lower surface of the main body (310)
The circular reinforcing net includes a spiral reinforcing bar 5 and a plurality of reinforcing bars 1 and 3. The reinforcing bars 1 and 3 are arranged in a circular shape and the outer portion of the reinforcing bars 1 and 3 is a spiral reinforcing bar 5,
The main body 310 is made of a material having elastic restoring force, and has an arc shape having a curvature radius smaller than that of the circular shape,
The reinforcing bar fixing portion 350,
A seating portion 352 formed in the main body 310 and having an opening of the inlet 353; And
And a guide portion (356) formed to close a part of the inlet (353) and having a predetermined elastic restoring force,
The guide portion 356 is bent when the reinforcing bar 3 is inserted so that the reinforcing bar 3 can be inserted into the seating portion 352. After the insertion, the reinforcing bar 3 is returned to its original shape, Supporting the reinforcing bars 3,
The reinforcing bar 3 is inserted and fixed to the reinforcing bar fixing portion 350 in a state where the reinforcing bars 1 are in contact with the lower surfaces of both sides of the main body 310 so that the main body 310 is stretched to have a radius of curvature larger than the original radius of curvature , So that the reinforcing bar fixing part (350) applies a pushing force to the reinforcing bar (3) outwardly of the reinforcing bar network. 6. The method of claim 5,
The concave and convex portions 312 are formed on the lower surface of the main body 310 so that the intervals between the reinforcing bars 1 and 3 are kept constant. Retaining device for reinforcing bars. The method according to claim 5 or 6,
The reinforcing bars (1) are tensioned ropes with both ends thereof fixed to the reinforcing tensioning device, and the reinforcing bars (3) are reinforcing rods without tensioning,
A protrusion column 320 is formed on the upper surface of the main body 310,
The protrusive pillars 320 may be formed at both ends of the main body 310 or at both ends and the center of the main body 310 or may be formed at predetermined intervals in the main body 310,
Wherein the protrusion pillars (320) maintain a constant distance between the mold and the reinforcing net.

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