KR20100060106A - Precast concrete box culvert assembly - Google Patents

Abstract

PURPOSE: A concrete manufacture assembly is provided to maintain the cohesive power between components. CONSTITUTION: A concrete manufacture assembly comprises a first closed conduit(100), a second closed conduit(200), a connecting part and a tensile steel wire. The first closed conduit is formed into the square shape to form a common duct in inside. The second closed conduit is formed in order to be communicated with the common duct of the first closed conduit. The connecting part is made of an insert nut and an engaging bolt. The connecting part is installed in the junction of the second closed conduit and the first closed conduit.

Description

Precast Concrete Box Culvert Assembly}

The present invention relates to prefabricated PC culverts and concrete product assemblies, such as manholes, water pipes.

In general, in the underground space of the city, sewers, electric power stations, communication districts, joint districts, etc. are installed to induce discharged sewage to sewage treatment plants or to lay cables providing electric power and communication services to homes. A buried road is formed, and the prefabricated culverts made of precast concrete (PC) are connected to each other to install sewers, electric power ports, communication ports, and joint holes.

Such culverts should be arranged in such a way that culverts are connected to each other as shown in FIG. 1. The culverts are arranged in positions to be laid respectively, and then closely connected.

In order to fix the culverts in close contact with each other, a hole penetrating in the longitudinal direction of the culvert and communicating with each other is formed in the corner portion of the culvert, and after inserting a tensile wire into the hole, the culverts are pressed and fixed to each other. .

At this time, a fixing hole is formed in the inner surface of the culvert is exposed end of the tensile steel wire is made to secure or pull the end of the tensile steel wire.

In addition, the bonding surface of each culvert is filled with mortar to improve the watertightness.

However, the conventional culvert fastening method has the following problems.

First, since the tensile steel is provided in the longitudinal direction of the culvert, there is a problem that a relatively large amount of work is required during the tensioning operation of pulling the tensile steel.

Second, since the tensile steel is exposed to the outside in the fixing hole used during the tensioning of the tensile steel, it is necessary to additionally fill the fixing hole to prevent corrosion.

Third, each of the culverts are supported by the ground, as shown in Figure 2, when unequal settlement occurs in the ground supporting each of the culverts, only one of the culverts is largely settled to provide adhesion to the culverts A large stress is generated in the tensile steel, and the tensile steel is stretched by creep after a long time. Therefore, the tension of the tensile steel is weakened and the adhesion of the culvert is weakened. If the above phenomenon is further progressed, watertightness between the culvert and the culvert may be destroyed, and groundwater flows in between, causing the tensile steel to corrode, which may further weaken the adhesion of the culvert and lead to breakage of the tensile steel wire. .

Fourth, there is a fear that when forming the hole into which the tensile steel wire is inserted may damage the reinforcing bar disposed inside the culvert may cause structural defects of the culvert.

Fifth, when the culvert is constructed in a curved portion, the tension of the tensile wire is concentrated on only one side, so that the adhesion between the culvert may be weakened and may cause premature breakage of the tensile steel or culvert.

In addition, the above problems are not limited to culverts, but may also occur in the installation of concrete product assemblies that are pre-fabricated in the form of divided parts as concrete, such as manholes and water pipes.

The present invention is to solve the problems as described above, the object of the present invention is to provide a concrete product assembly that is effectively maintained in close contact between each part to be assembled and installed in the field in the form of divided parts as concrete.

In order to achieve the above object, the present invention is the first concrete member made of concrete, the second concrete member coupled to one side of the first concrete member, the first concrete member and the second concrete member on the mutual joint surface The fastening part is installed and the fastening part is inserted into the first concrete member and the second concrete member, the tension is applied to the tension in the direction intersecting the longitudinal direction of the first concrete member and the second concrete member is fastened The present invention provides a concrete product assembly comprising a tensile steel wire for bringing the first concrete member and the second concrete member into close contact with each other.

The fastening part may include an insert nut provided at each joint surface of the first concrete member and the second concrete member, and a fastening bolt fastened to the insert nut and having a through hole through which the tensile steel wire passes. Can be.

In addition, the fastening bolts provided on the joining surface of the first concrete member and the fastening bolts provided on the joining surface of the second concrete member may be formed at staggered positions when the first concrete member and the second concrete member are joined. Can be.

Alternatively, the fastening part may include an insert nut provided around each joining surface of the first concrete member and the second concrete member, and a fixing bolt fastened to the insert nut and having an end of the tensile steel wire fixed thereto. It may be done.

In addition, the fixing bolt may be formed to have a tapered hollow so as to narrow toward the opposite side of the tension wire tension direction.

In addition, the steel wire fixing device is made to be fixed to the tension steel wire to the fixing bolt may be further provided.

The steel wire fixing device may be formed to have a hollow formed so that the end is fixed to the tensile steel, and an outer circumferential surface tapered so as to narrow toward the opposite side of the tension wire in the tension direction.

The wire fixing device may be divided into a plurality.

The steel wire fixing device may be inserted into the inner circumferential surface of the fixing bolt, pressurized to one side by the tension of the tensile steel wire, and compressed by the tapered inner circumferential surface of the fixing bolt to increase the fixing force for fixing the tensile steel wire. have.

A groove into which a rubber ring friction with the inner circumferential surface of the fixing bolt is inserted may be provided along the circumference of the steel wire fixing device.

In addition, the fixing bolt is formed so that the hole through which the tensile steel wire is formed, the support tab is formed on the support bolt formed on the one surface of the fixing bolt and a tapered shape therein, the outer peripheral surface is inserted into the hole of the support tab After being formed to be tapered to be fixed and the steel wire fixing device is formed in which the hollow is formed through which the tensile steel wire is fixed.

In addition, mortar grooves forming a space in which a watertight material is filled in at least one of the joining surfaces of the first concrete member and the second concrete member may be formed along each joining surface of the first culvert and the second culvert. have.

The fastening part may be located inside the mortar groove.

In addition, an index member may be provided between the first concrete member and the second concrete member.

In addition, the first concrete member and the second concrete member, it may be made to include a hollow sphere formed to communicate with each other inside.

In addition, the first concrete member and the second concrete member may be made of a hollow sphere in communication with each other made of a cross-sectional shape of one side of the shape of the ∪.

According to the concrete product assembly according to the present invention has the following effects.

First, while the conventional tensile steel wire is arranged in the longitudinal direction of the culvert, the present invention is disposed in the height or width direction of the culvert, so that its length can be shortened, so that the same load as the prior art acts upon uneven settlement of the ground. The length of the culvert can be shortened even if it is minimized, thereby minimizing watertight destruction, sewage outflow, groundwater inflow, and corrosion of tensile steel.

Second, in the prior art, the culvert needs to be filled in the fixing hole after closely contacting the culvert, but the prefabricated culvert according to the present invention does not need the fixing hole in the middle of the culvert, and thus does not need the corresponding work, thereby improving workability and productivity.

Third, since there is no need to form a hole in the culvert for the insertion of the tensile steel wire, there is no fear that the rebar disposed inside the culvert is damaged.

Fourth, even when the culvert is constructed in a curved line can provide the same adhesion as the straight portion to prevent premature failure of the tensile steel wire and culvert.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

The concrete product assembly according to the present invention may include a first concrete member and a second concrete member and a fastening portion and a tensile steel wire.

In describing the present invention, an example of the concrete product assembly will be described with an example of a PC culvert that is pre-molded with concrete and then assembled in the field. That is, in the present embodiment, the concrete assembly may include a first culvert, a second culvert, a fastening part, and a tensile steel wire.

As shown in FIGS. 3 and 4, the first culvert 100 may be formed in a quadrangular shape such that the cavity 102 is formed therein.

In addition, a second culvert 200 is provided on one side of the first culvert 100. The second culvert 200 is formed such that the hollow sphere formed therein communicates with the hollow sphere of the first culvert 100.

Here, the first culvert 100 and the second culvert 200 may take a variety of cross-sectional shape, in this embodiment the cross section of the first culvert 100 and the second culvert 200 is in the shape of a substantially rectangular. To take, the cavity sphere 102 is communicated with each other is formed inside. Of course, the first culvert 100 and the second culvert 200, as well as the first concrete member and the second concrete member may be formed in a cross-section of various shapes of the shape of L and T-shaped.

The first culvert 100 and the second culvert 200 are coupled to each other, the surfaces that abut each other will be referred to as a bonding surface.

As shown in FIGS. 3 and 4, joining surfaces of the first culvert 100 and the second culvert 200 are provided with a fastening part including insert nuts 110 and 210 and fastening bolts 120 and 220. do.

3 illustrates a fastening part including the insert nut 110 and the fastening bolt 120 provided along the height direction of the first culvert 100 on both sides of the joint surface of the first culvert 100. .

The engaging surface of the second culvert 200 is also made of a symmetrical form with the engaging surface of the first culvert 100, the fastening portion consisting of the insert nut 210 and the fastening bolt 220 is the second culvert 200 ) Is provided along the height direction of the second culvert 200 on both sides of the bonding surface.

In addition, the tensile steel wire 300 is inserted into the fastening bolts 120 and 220 facing each other in one row when the first culvert 100 and the second culvert 200 are coupled, as shown in FIG. 9. do.

Further, another tensile steel wire 300 is inserted into the fastening bolts 120 and 220 facing each other in the other rows.

That is, the tensile steel wire 300 pulls the fastening bolts 120 and 220 of the first culvert 100 and the second culvert 200 facing each other as the tension of the first culvert 100 and the second culvert ( 200) by pulling the components are in close contact with each other.

Since the fastening bolts 120 and 220 are formed along the height direction of the culvert, the tensile steel wire 300 is also tensioned in the height direction of the culvert, which may be expressed in a direction crossing the longitudinal direction of the culvert. .

 As shown in FIG. 5, the fastening part may include an insert nut 110 and a fastening bolt 120.

The insert nut 110 is inserted into each joining surface when the first culvert 100 or the second culvert 200 is manufactured.

Here, the insert nut 110 formed on the side of the first culvert 100 and the insert nut 210 formed on the side of the second culvert 200 facing the first culvert 100 and the second culvert ( 200 are formed at staggered positions so that they do not face each other when joined.

In addition, the fastening bolt 120 may have a screw thread formed at one side thereof to be fastened to the insert nut 110, and a through hole 122 through which the tensile steel wire 300 penetrates at the other side thereof.

In addition, the through-holes of the fastening bolt 120 installed on the first culvert 100 and the fastening bolt 220 installed on the second culvert 200 have a length such that they do not overlap each other in the cross section. Can be done.

Meanwhile, the fastening part may include the insert nut and the fixing bolt.

Since the insert nut is the same as the insert nut 110 described above, description thereof will be omitted.

The fixing bolt is a component for maintaining the tension by fixing the tensile steel wire 300 in a tensioned state.

The fixing bolt may be fastened to insert nuts 110 and 210 provided at both ends of one side of the first culvert 100 and the second culvert 200.

In this embodiment, two types of fixing bolts are disclosed as the first fixing bolt 130 and the second fixing bolt 140, and the first fixing bolt 130 and the second fixing bolt ( For example, 140 is installed in the first culvert 100. However, the present invention is not limited to the above examples and various combinations are possible.

As shown in FIGS. 3 and 6, the first fixing bolt 130 is a component that fixes one end of the tensile steel wire 300 to the culvert side, and is connected to the bonding surface of the first culvert 100. One end of the insert nut 110 is installed, it may be fastened to the insert nut 110 is installed on the lower end.

As shown in FIG. 6, the first fixing bolt 130 has a screw thread formed on an outer circumferential surface thereof so as to be fastened to the insert nut 110, and the inside of the first fixing bolt 130 is hollow. The taper may be formed to be narrowed toward the opposite side of the tensioned direction, that is, to the opposite side of the culvert.

In addition, a steel wire fixing device 310 may be provided at the end of the tensile steel wire 300. The steel wire fixing device 310 is formed inside the hollow to be inserted and fixed to each end of the tensile steel wire 300, the outer circumferential surface thereof may be made to be wider toward the end of the tensile steel wire (300).

In addition, as shown in FIG. 7, the steel wire fixing device 310 slides along the inner circumferential surface of the first fixing bolt 130 when the tensile steel wire 300 is tensioned, and compresses and fixes the tensile steel wire 300. It may be divided into two or more pieces divided in the longitudinal direction to facilitate the operation.

In addition, the outer circumferential surface of the steel wire fixing device 310 of the O-ring type for the purpose of integrating the steel wire fixing device 310 divided into two or more and suppress the movement of the steel wire fixing device in the direction of the insert nut (100). A groove 312 into which the rubber ring 314 is inserted may be formed.

In addition, any one of the steel wire fixing device 310 of the steel wire fixing device 310 provided at both ends of the tensile steel wire 300 is inserted into the tapered inner peripheral surface of the first fixing bolt 130. At this time, the maximum diameter of the steel wire fixing device 310 is preferably made larger than the minimum diameter of the tapered inner peripheral surface of the first fixing bolt (130). Therefore, the tensile steel wire 300 and the steel wire fixing device 310 may not be removed from the first fixing bolt 130.

In addition, as shown in FIGS. 3 and 8, the second fixing bolt 140 is a component in which the tensile steel wire 300 is fixed in a state where the tension of the tensile steel wire 300 is maintained after the tensioning operation. The other end of the insert nut 110 provided on the surface on which the first fixing bolt 130 is installed is inserted into the insert nut 110 located at the other end.

As shown in FIG. 8, the second fixing bolt 140 has a thread formed on an outer circumferential surface thereof so that one end thereof can be fastened to the insert nut 110, and a hole 142 through which a tensile steel wire can pass. Is formed. The hole 142 may be formed in a direction in which the tensile steel wire 300 is pulled.

In addition, the second fixing bolt 140 is supported on the wall surface of the first culvert 100 when the tensile steel wire 300 is tensioned to lower the load to be applied to the second fixing bolt 140 more firmly It can be formed to extend.

In addition, a support tab 320 is inserted into the steel wire fixing device 310 of the other end of the tensile steel wire 300 to the outside of the second fixing bolt 140.

The support tab 320 is supported by the second fixing bolt 140, the hollow of the tapered form is widened toward the other end of the tensile steel wire 300 is formed. At this time, the minimum diameter of the inner peripheral surface of the second fixing bolt 140 side of the support tab 320 may be formed to be smaller than the minimum diameter of the steel wire fixing device (310).

Therefore, the steel wire fixing device 310 of the other end of the tensile steel wire 300 is inserted and fixed to the inner peripheral surface of the support tab 320, the support tab 320 is supported by the second fixing bolt 140. . At this time, since the tensile steel wire 300 is pulling the steel wire fixing device 310 and the support tab 320 to the second fixing bolt 140 side, the support tab 320 and the steel wire fixing device 310 is not removed.

Meanwhile, the mortar groove 106 may be formed on at least one side of the bonding surface of the first culvert 100 or the second culvert 200. Herein, the term "formed in at least one of" means that the bonding surface on the side of the first culvert 100 or the second culvert 200 may be formed on the bonding surface or both bonding surfaces.

In addition, a fastening part including the insert nuts 110 and 210 and the fastening bolts 120 and 220 or the fastening bolts 130 and 140 may be located inside the mortar groove 106.

In addition, the index member 520 around the mortar groove 106 may be provided as a ring.

It will be described the construction method of the prefabricated culvert of the present invention as described above.

First, as shown in FIG. 4, the fastening bolts 120 and 220 and the second fixing bolt 140 are inserted into the insert nuts 110 and 210 inserted into the joint surfaces of the first and second culverts 100 and 200. Install).

As shown in FIG. 9, the tensile steel wire 300 penetrates through the installed second fixing bolt 140 and the fastening bolts 120 and 220 of the first culvert 100 and the second culvert 200. Install.

Then, one end of the tensile steel wire 300 is inserted from the opposite side of the threaded portion of the through-hole formed in the first fixing bolt 130, and then the steel wire fixing device 310 is inserted into the end of the tensile steel wire 300 and the tensile steel wire 300 Pull) so that the steel wire fixing device 310 is inserted into the first fixing bolt 130, and the first fixing bolt 130 is fastened to the insert nut 110 of the bottom of the first culvert 100.

And, as shown in Figure 10, by using a separate mechanism such as the hydraulic jack 400 to pull to the other side of the tensile steel wire 300 to tension. The tensioned tensile steel wire 300 is pulled taut and thus the first culvert 100 and the second culvert 200 are in close contact with each other.

After the first culvert 100 and the second culvert 200 are sufficiently in close contact with each other, the other end of the tensile steel wire 300 drawn by the hydraulic jack 400 is cut, as shown in FIG. Install the 310 and the support tab 320.

At this time, another method of fixing the tensile steel wire 300 on the side of the second fixing bolt 140 is the steel wire fixing device 130 and the support tab at the end of the tensile steel wire 300 before tensioning the tensile steel wire 300 After installing (320) first and tensioning the tensile steel wire (300) with the hydraulic jack 400, and then push the steel wire fixing device 310 into the inner through hole of the support tab 320 to fix the tensile steel wire (300) After the tension is maintained, a method of cutting the other end of the tensile steel wire 300 may be used.

Since the tensile steel wire 300 is in a tensioned state, the steel wire fixing device 310 installed at both ends of the tensile steel wire 300 is pulled by the tension, and the first fixing of the steel wire fixing device 310 is supported. Since the inner circumferential surface of the bolt 130 and the inner circumferential surface of the support tab 320 are inclined to be tapered, the steel wire fixing device 310 is not removed from the first fixing bolt 130 and the support tab 320 so that the tensile steel wire Tension of 300 may be maintained. In addition, the steel wire fixing device 310 may be pressed while being pulled by the tension of the tensile steel wire 300 may further increase the fixing force between the steel wire fixing device 310 and the tensile steel wire (300).

At this time, the end of the second fixing bolt 140 side of the steel wire fixing device 310 is made to be located in the mortar groove 106 without departing from the outside of the first culvert 100 or the second culvert 200. desirable.

The operation as described above may be made in each of the fastening portions provided on both sides of the joining surface of the first culvert 100 and the second culvert 200 to combine the first culvert 100 and the second culvert 200. .

In addition, after the tension operation of the tensile steel wire 300 is completed as described above, as shown in FIG. 11, a watertight material such as mortar 510 is injected into the mortar groove 106 through the mortar inlet 108. To enhance watertightness.

Since the tensile steel wire 300 and the fastening portion are located inside the mortar groove 106, the tensile steel wire 300 and the fastening bolts 120 and 220 by the mortar 510 as shown in FIGS. 12 and 13 and The first fixing bolt 130, the second fixing bolt 140, the support tab 320 is covered.

Accordingly, the mortar 510 may simultaneously serve as a watertight material for preventing sewage from leaking from a culvert and at the same time serving as a coating material for preventing the tensile steel wire 300 and the fastening portion from being corroded by groundwater.

In addition, the mortar 510 is fixed so that the tensile steel wire 300 does not move, to prevent the phenomenon that the tension force is relaxed while moving after construction, the adhesion between the first culvert 100 and the second culvert 200 is You can also keep it constant.

In addition to the description of the construction method, although not shown in the drawings, the concrete assembly of the present invention is one tensile steel wire 300 in the fastening portion formed on both sides of the joint surface of the first culvert 100 and the second culvert 200 It can also be constructed by fastening all together.

That is, after coupling the fastening bolts 120 to the position of the first fixing bolt 130, the fastening portion formed on both sides of the joint surface of the first culvert 100 and the second culvert 200 as one tensile steel wire After penetrating, one end of the tensile steel wire 300 is fixed to the second fixing bolt 140 formed on one side of the joint surface using the support tab 320 and the steel wire fixing device 310, and the tensile steel wire 300 The other end of the) is fixed to the second fixing bolt 140 formed on the other side of the bonding surface using the support tab 320 and the steel wire fixing device 310.

In addition, after tensioning the tensile steel wire 300 in the same manner as the above-described embodiment, both ends of the tensile steel wire 300 may be cut to maintain the tension force.

On the other hand, the first concrete member and the second concrete member, in addition to the PC culvert prefabricated and assembled in the field, a water pipe can also be applied. Hereinafter, with reference to FIG. 14 as an example, the present invention is applied to the water pipe.

As shown in FIG. 14, the concrete product assembly according to the present exemplary embodiment may include a first water pipe 300, a second water pipe 400, a fastening part, and a tensile steel wire 300 (see FIG. 9).

The first waterway pipe 300 and the second waterway pipe 400 may be made of concrete and formed to have a 를 -shaped cross-sectional shape in which a cavity is formed in the upper side thereof.

In addition, the second water pipe 400 is coupled to one side of the first water pipe 300, and at this time, the cavity of the first water pipe 300 and the cavity of the second water pipe 400 communicate with each other.

Here, the coupling surface to which the first water pipe 300 and the second water pipe 400 are coupled to each other will be referred to as a bonding surface.

In addition, the coupling surface of the first water pipe (300) and the coupling surface of the second water pipe (400) includes an insert nut 110, a fastening bolt 120 and a fixing bolt (130, 140) fastening Additional portions may be provided.

Hereinafter, the structure and structure of the fastening portion, and the shape and the second of the tensile wire (300: see Fig. 9) for tightening and fastening the first water pipe 300 and the second water pipe 400 after being fastened to the fastening portion Since the fixing method of the first water pipe 300 and the second water pipe 400 is the same as the above-described embodiment, a detailed description thereof will be omitted.

In addition, other matters not described in the present embodiment are the same as the above-described embodiment, so that those skilled in the art will be able to easily perform the same.

In addition, the first concrete member and the second concrete member may be applied to blocks or retaining wall blocks used for partitions of rice fields or fields, in addition to culverts that are manufactured and assembled in the field. In the following description, FIG. 15 is taken as an example in which the present invention is applied to a block.

As shown in FIG. 15, the concrete product assembly according to the present embodiment may include a first block 500 and a second block 600, a fastening part, and a tensile steel wire 300 (see FIG. 9). have.

The first block 500 and the second block 600 is made of concrete, formed to form a cross-section of the approximately T-shape, used in the partitions of rice fields or fields, or blocks that form a retaining wall to prevent the loss of soil Can be used.

The second block 600 is coupled to one side of the first block 500. Here, the coupling surface to which the first block 500 and the second block 600 are coupled to each other will be referred to as a bonding surface.

In addition, the joining surface of the first block 500 and the joining surface of the second block 600 includes an insert nut 110, a fastening bolt 120, and fastening bolts 130 and 140. Additional portions may be provided.

Hereinafter, the structure and structure of the fastening portion, and the shape and the shape of the tensile steel wire 300 (see Fig. 9) to secure the first block 500 and the second block 600 is coupled after being fastened to the fastening portion Since the fixing method of the first block 500 and the second block 600 is the same as the above-described embodiment, a detailed description thereof will be omitted.

Of course, the cross-sectional shape of the first block 500 and the second block 600 is not limited to the T-shape, but may take various forms such as an I-shape or an L-shape.

In addition, other matters not described in the present embodiment are the same as the above-described embodiment, so that those skilled in the art will be able to easily perform the same.

In addition, although not shown in the drawings, the present invention can also be applied to the assembly of the manhole prefabricated and assembled in the field. That is, the fastening portion and the tensile steel wire may be provided on each joining surface of the manhole divided into an upper sphere and a lower sphere.

Of course, the present invention can be applied to the combination of a variety of concrete facilities, such as a pre-fabricated in the form of parts in addition to the water pipe, sewage pipe, partition block in addition to the above-described PC culvert.

As described above, the preferred embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

1 is a perspective view showing a part of a conventional prefabricated culvert;

Figure 2 is a side view showing a state in which the ground supporting the conventional prefabricated culvert is unevenly settled;

3 is a perspective view of a first culvert according to an embodiment of a prefabricated culvert according to the present invention;

4 is a cross-sectional view showing a bonding surface of the first culvert and the second culvert according to an embodiment of the prefabricated culvert according to the present invention;

5 is a cross-sectional view showing an insert nut and a fastening bolt according to an embodiment of a prefabricated culvert according to the present invention;

6 is a cross-sectional view showing an insert nut, a first fixing bolt and a steel wire fixing device according to an embodiment of a prefabricated culvert according to the present invention;

Figure 7 is an exploded perspective view showing a steel wire fixing device according to an embodiment of a prefabricated PC culvert according to the present invention;

8 is a cross-sectional view showing an insert nut, a second fixing bolt, a support tab, and a steel wire fixing device according to an embodiment of a prefabricated culvert according to the present invention;

9 is a cross-sectional view showing a state in which a tensile steel wire is woven to the fastening bolt and the first fixing bolt and the second fixing bolt of Figure 4;

10 is a cross-sectional view showing a tension state in which the tensile steel wire of Figure 9 is pulled;

11 is a cross-sectional view illustrating a state in which the tensile steel wire of FIG. 10 is cut and supported by a second fixing bolt;

FIG. 12 is a cross-sectional view illustrating mortar filled in mortar grooves of the first and second culverts of FIG. 11;

FIG. 13 is a sectional view of the bonding surface of the first and second culverts of FIG. 12 viewed from different angles; FIG.

14 is a perspective view showing a first concrete member and a second concrete member according to another embodiment of the present invention; And,

15 is a perspective view illustrating a first concrete member and a second concrete member according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: first culvert 102: hollow ball

106: mortar groove 108: mortar inlet

110: insert nut 120: fastening bolt

122: through hole 130: first fixing bolt

140: second fixing bolt 142: hole

200: second culvert 210: insert nut

220: fastening bolt 300: tensile steel wire

310: steel wire fixing device 320: support tab

400: hydraulic jack 510: mortar

520: index material

Claims (16)

A first concrete member made of concrete; A second concrete member coupled to one side of the first concrete member; A fastening part installed on a mutual joint surface of the first concrete member and the second concrete member; And The first concrete member and the second concrete member is inserted into the fastening portion, the first concrete member and the second concrete member is tensioned so as to act in the direction intersecting the longitudinal direction of the second concrete member by pulling the respective fastening portion A tensile steel wire for closely contacting the one concrete member and the second concrete member; Concrete product assembly comprising a. The method of claim 1, The fastening portion, Insert nuts provided on the joint surfaces of the first concrete member and the second concrete member; A fastening bolt fastened to the insert nut and having a through hole through which the tensile steel wire passes; Concrete product assembly comprising a. The method of claim 2, The fastening bolt provided on the joining surface of the first concrete member and the fastening bolt installed on the joining surface of the second concrete member are formed at staggered positions when the first concrete member and the second concrete member are joined. Concrete product assembly. The method of claim 1, The fastening portion, An insert nut provided around each joining surface of the first concrete member and the second concrete member; The concrete product assembly is fastened to the insert nut, characterized in that it comprises a fixing bolt fixed to the end of the tensile steel wire. The method of claim 4, wherein The fixing bolt is a concrete product assembly, characterized in that it is formed to have a tapered hollow so as to narrow toward the opposite side of the tension wire tension direction. The method of claim 5, Concrete product assembly characterized in that the steel wire fixing device is further provided to be fixed to the fixing steel wire for the fixing bolt. The method of claim 6, The steel wire fixing device is a hollow formed so that the end is fixed to the tensile steel wire, The concrete product assembly, characterized in that formed to have an outer peripheral surface tapered to narrow toward the opposite side of the tension wire tension direction. The method of claim 6, The steel wire fixing device is a concrete product assembly, characterized in that divided into a plurality. The method of claim 7, wherein The steel wire fixing device is inserted into the inner circumferential surface of the fixing bolt, is pressed to one side by the tension of the tensile steel wire is pressed by the tapered inner circumferential surface of the fixing bolt is characterized in that the fixing force for fixing the tensile steel wire is increased Concrete product assembly made with. 10. The method of claim 9, Concrete assembly, characterized in that the groove is inserted into the outer peripheral surface of the steel wire fixing device is inserted into the rubber ring friction with the inner peripheral surface of the fixing bolt. The method of claim 1, Mortar groove forming a space in which the water-tight material is filled in at least one of the joining surface of the first concrete member and the second concrete member is formed along each joining surface of the first concrete member and the second concrete member. Concrete product assembly. The method of claim 11, The fastening part is a concrete product assembly, characterized in that located within the mortar groove. The method of claim 1, Concrete product assembly, characterized in that the index member is provided between the first concrete member and the second concrete member. The method of claim 1, The first concrete member and the second concrete member, the concrete product assembly, characterized in that it comprises a cavity formed in communication with each other therein. The method of claim 1, The first concrete member and the second concrete member is a concrete product assembly, characterized in that the cross-section is formed in the form of one side of the shape of the open side comprises a hollow sphere communicating with each other. The method of claim 4, wherein The fixing bolt is made so that the hole through which the tensile steel wire is formed, A steel wire having a support tab formed on a surface of the fixing bolt and having a tapered hole therein, and an outer circumferential surface formed to be tapered to be fixed after being inserted into a hole of the support tab, and having a hollow through which the tensile steel wire is fixed. Concrete product assembly characterized in that the fixing device further comprises.

Images