KR100824834B1 - The Prefabricated Precast Concrete Culvert Connecting By Inserting Hook Into Ring. - Google Patents

Abstract

The present invention relates to a prefabricated reinforced concrete culvert. In the conventional culvert, the uneven portions and the water repellent material are installed at each end of the culvert, are closely attached and bonded to each other, and then connected by tension with a PC steel wire. In a more improved method, mortar grooves, index materials, and eye bolts are installed at both ends of the culvert, and adjacent culverts are brought into close contact with each other. Then, a steel rod is inserted into the common cavity formed by the eye bolts between the adjacent culverts, and the mortar (15) is inserted. Filled and connected.

The mortar groove 18, the index member 16, the hook reinforcing bar 10 is installed at one end of the culvert of the present invention, and the mortar groove and the connecting ring or hook reinforcing bar are installed at the other end. Culvert connection closes and connects individual culverts to each other, so that the other end of the hook rebar is attached to the joint cavity or hook reinforcing bar installed at one end of the culvert, and the mortar (15) is filled in the closed space at both ends to connect the culvert. Let's do it.

If the culvert is connected in the same manner as described above, the culvert can be connected even if the steel bar is deleted by inserting the steel bar between the conventional eye bolts 12. In addition, by installing the hook reinforcing bar 10 and the connecting ring on the upper and lower plate slab, the side wall of the culvert, it is possible to improve the structural stability and usability, durability, workability, economics and the like than the conventional connection method.

Culverts, PC culverts, power ports, telecommunications ports, communal wards.

Description

Prefabricated Precast Concrete Culvert Connecting By Inserting Hook Into Ring. {The Prefabricated Precast Concrete Culvert Connecting By Inserting Hook Into Ring}

1A is a perspective view of citation 1;

1B is a perspective view of Citation 2;

Figure 1c is a cross-sectional view of the culvert during natural slopes.

Figure 1d is a cross-sectional view of the culvert at the installation of the temporary equipment.

Figure 2a is a perspective view of the culvert connection method Example 1.

FIG. 2B is a cross-sectional view taken along the line AA ′ of FIG. 2A;

FIG. 2C is a cross-sectional view taken along line B-B 'in FIG. 2A;

FIG. 2D is a cross-sectional view taken along line C-C 'in FIG. 2A;

Figure 3a is a perspective view of the culvert connection method Example 2.

3B is a cross-sectional view taken along the line A-A 'of FIG. 3A.

3C is a cross-sectional view taken along line B-B 'in FIG. 3A.

3D is a cross-sectional view taken along line C-C 'in FIG. 3A.

Figure 4a is a perspective view of the culvert connection method Example 3.

4B is a sectional view taken along the line A-A 'in FIG. 4A;

4C is a cross-sectional view taken along line B-B 'in FIG. 4A.

4D is a cross-sectional view taken along line C-C 'in FIG. 4A.

Figure 5a is an exemplary view of the shape of the reinforcing bar and connecting ring.

Figure 5b is an example of reinforcing hook portion fixing force of the hook rebar.

<Meaning and definition of abbreviation in the present invention>

Unless otherwise specified in the present specification, the meanings and definitions of the following abbreviations follow.

Prefabricated reinforced concrete culverts are called culverts .

▶ The upper and lower slabs are called ' upper slabs '.

▶ Korean Utility Model Registration No. 0157898 is referred to as ' quotation proposal 1 '.

▶ Republic of Korea Utility Model Registration No. 0223229 is referred to as ' quotation proposal 2 '.

▶ Eye nuts, eye bolts and U-shaped rings are collectively called ' connection rings '.

<Drawing code and function explanation>

▶ Hook reinforcing bars (10) -One end of the steel rod, circular reinforcing bars, and deformed reinforcing bars are processed like hooks, and the other end is embedded in the culvert, and when the culverts are connected, the hook parts of the hook rebars are adjacent to each other. The culvert is connected by inserting into the cavity part of the eye nut 11, the eyebolt 12, the citron-shaped ring 19, etc. which are installed in the other end of the culvert, or hooking the hook part of the rebar.

▶ Eye Nut (11) -A ready-made product consisting of a ring-shaped body and a nut-type connection part, specified in KS B 1034. In the present invention was used as a culvert linkage.

▶ Eye Bolt (12) -A ready-made product consisting of a ring-shaped body and a bolt-type connection part, specified in KS B 1033. In the present invention was used as a culvert linkage.

▶ Mortar injection holes (13, 14) -Mortar grooves (18) are formed in the individual culverts, when the culvert and culverts are closely connected to each other, two holes in communication with the mortar grooves are formed at the upper end of the culvert connection. It is called mortar injection hole. The mortar 15 is injected through the hole to fill the mortar grooves between the culvert connections with the mortar.

▶ mortar (15) -Mortar grooves (18) are dug at the ends of individual culverts when adjacent culverts are connected to each other to create a space formed as mortar grooves between culvert connections. In this space, the hook reinforcement 10 and the link are connected like male and female. Mortar is injected into the upper hole of the culvert connection part to fill the empty space around the hook rebar and the connecting ring to connect the culvert integrally.

▶ Index material (16) -Attached to the inside and outside of the mortar grooves (18) formed on both ends of the individual culverts, it performs a buffering function and prevents the mortar (15) leakage during the close contact between adjacent culverts during construction, and serves as an index material during common use do.

Coupling Nut (17)-It is a nut that is longer than the general nut. It is used to connect the computer bolts to each other in the industrial field. It is also called a connecting nut or joint coupling nut. In the present invention, it was used to connect the anchoring rods and eyebolts (12) or the anchoring bars and hook bars (10) embedded in the culvert.

▶ Mortar Groove (18) -It is a space in which a combination of hook and reinforcing bar is accommodated and filled with mortar (15) in grooves dug along the four sides of the upper and lower slabs and side walls at the end of the culvert.

▶ U-shaped ring (19) -It is a connection ring made of a semi-circular shape by processing steel bar, circular reinforcement or deformed reinforcing bar and fixing part, similar in shape to the ready-made U type bolt (see Fig. 5a). In the present invention, it was used as a culvert linkage.

In the conventional culvert, a recess is provided at one end of the culvert, and a convex part is provided at the other end, and adjacent culverts are inserted and coupled with each other, and the tension is connected by tension with a PC steel wire. The culvert's connection is provided with only a simple index material (16), and there is no other action such as filling the mortar (15) to fill the gap, so that the gap between the culvert and the culvert is leaked and the foundation ground is settled so that the longitudinal line of the channel is deformed. It was a cause of frequent defects.

The mortar groove 18, the index member 16, the eyebolt 12, etc. are installed at the end of the culvert in a more improved manner than the conventional culvert, and adjacent culverts are brought into close contact with each other. Steel rods were inserted and filled with mortar (15) in the empty spaces. This method solves the problem of structural leakage and the leakage problem of the connection part in the conventional culvert. The composition of this design is published in Citations 1 and 2. Other designs similar to the cited proposals include Korean Utility Model Registration Nos. 200193604, 200235128, 200236769, and 200233156.

In order to analyze the technical problems in the conventional culverts and to find ways to improve them, the technical structure of the citations 1 and 2 will be described.

1. Quotation and Security

1A shows a representative example of a culvert connected to an eyebolt 12 as a perspective view of Cited Proposition 1. Eye bolts are installed on the side walls of the individual culverts, and mortar grooves 18 are dug along the four sides of the culvert ends, and water stoppers (not shown) and PC steel wire (not shown) are installed inside and outside the mortar grooves. It is.

The culvert connection method is to close the adjacent culvert (N + 1) to the culvert (N) while intersecting the eyebolts (12) of the culvert (N) and the eyebolts of the adjacent culvert (N + 1) to each other and perpendicular to the side wall. The steel rod is inserted into the cavity of the eyebolt formed in the direction, and after tensioning with the PC steel wire, the mortar 15 is injected into the mortar groove 18 of the female end through the mortar injection holes 13 and 14 to connect the mortar 15. The rod insertion inserts one long steel rod into the left and right side walls in the vertical direction through the mortar injection holes 13 and 14 formed at the upper end of the culvert, thereby connecting the upper and lower eyebolts of the side walls.

1b is a perspective view of citation 2 and the configuration of the design is almost the same as citation 1. However, the difference is that in the proposal 2, the eye bolts 12 are installed on the upper and lower slabs of the culvert, and the rods are connected to the upper and lower slabs of the upper and lower slabs by inserting one long steel rod in the horizontal direction. .

2. Improvements in the citations required.

▶ Quote 1-Since the eye bolt (12) is installed only on the culvert side wall, it is more structurally disadvantageous to install the eye bolt on the upper and lower slabs farther from the neutral axis of the culvert. In addition, in multiple culverts with relatively heavy loads compared to single culverts, the thickness of the concrete on the middle wall is so small that the eye bolt cannot be installed. Difficult to secure. Indeed, even when tracking the example of Proposition 1, there seems to be no example of connecting eye bolts to the intermediate wall in multiple culverts. In addition, a long steel rod must be inserted into the side wall of the culvert in a vertical direction. However, when the temporary facility is installed and the strut and the rod insertion hole overlap as shown in FIG. 1D, it may be difficult to insert the steel rod.

▶ Quote 2-Quote 2 seems to have solved the problem of Quote 1 by installing an eye bolt (12) in the upper and lower slabs of the culvert. However, the insertion of long steel bars in the horizontal direction at the upper and lower sides of the culvert is impossible in construction, and Citation 2 remains an unfinished proposal that has not been implemented after application. 1C and 1D, a cross-sectional view of a base trench is shown in the construction of a culvert. As shown in the cross-sectional view, the steel bar of the lower plate slab can be hardly inserted because of lack of working space when the bar of slab is lowered in natural slopes. Similarly, in the steel bar of the upper slab, the rod can not be inserted unless the width source of B ₂ in FIG. 1C is wider than the width source B of the culvert. Furthermore, in the case of FIG. Then, it may be thought that the excavation width should be made wide enough, but since most of the culverts are buried underground, widening the excavation width will increase the excavation volume and increase the construction cost and air delay. Moreover, in case of urban construction, most of the culverts are constructed along the road center line and even temporary facilities are installed to secure lanes. In addition, the wider the width of the culvert, the wider the rod to be inserted.

The big problem raised in the above cited proposal is that, in the cited draft 2, ' the horizontal rod insertion for connecting the eye bolts installed on the upper and lower slabs of the culvert is impossible as long as the culvert is constructed underground ', etc. Once this is resolved, the problem in Proposition 1 is automatically resolved.

In the present invention, in order to solve the problems posed by the above cited proposals, culvert one end upper and lower plate slab, hook reinforcing bar 10 on the side wall, culvert other end upper and lower plate slab, connecting to the hook or hook to install the rebar We want to provide the culvert. The connecting ring has a cavity, such as an eye bolt 12, so that the hook portion of the hook reinforcement is inserted into the cavity to connect the culvert, or hook the hook rebar and hook rebar to hook each other in the hook portion. That is, to provide a culvert connected to the upper and lower slab, the hook reinforcing bar 10 and the connecting ring in the side wall, the hook reinforcing bar and the hook reinforcing bar. These culverts are structurally more advantageous than the case where the eye bolts are installed only on the side walls by installing hook bars and connecting rings on the upper and lower slabs farthest from the neutral shaft, and exhibit sufficient strength even in multiple culverts with excessive loads. can do. In addition, by eliminating the steel rod inserted to connect the eye bolt 12, it is possible to reduce the material cost and installation labor costs, there is no need to secure the steel rod insertion work space from the outside of the culvert, it is economical by excavating only the minimum width source during foundation excavation The construction can be shortened by air.

In all the following embodiments illustrating the configuration of the present invention, an embodiment in which one of the eye rings 11, the eye bolts 12, the U-shaped ring 19, and the like is selected and applied will be described. The same applies to other linkages that are not used.

1. Culvert connection method Example 1

1. FIG. 2A is a perspective view of a culvert connection method of Embodiment 1, and a perspective view of a series culvert connected to a hook reinforcement 10 and an eye nut 11 is shown in FIG. 2B, and a cross-sectional view taken along line A-A 'of FIG. Only the claw rebar and eye nut are installed on the upper and lower slabs, but the hook rebar and eye nut can be installed on the side wall at the same time as the top and bottom slabs.

▶ Cross-sectional shape and configuration of culvert-Mortar grooves 18 connected to each other on the upper and lower plate slabs and left and right side walls of individual culverts are dug, and an index member 16 is attached to the inside and outside of the mortar grooves. Mortar grooves form a space that can be accommodated in half when connected to the adjacent culverts to form a mortar (15). Two holes (13, 14) are formed at the upper end of the culvert connection, and mortar injection is made through this hole. An eye nut 11 is installed in the upper and lower plate slab mortar grooves at one end of the culvert N, and a hook reinforcement 10 is provided at a position corresponding to the eye nut at the other end of the adjacent culvert N + 1. .

▶ Culvert connection method-Culvert connection corresponds to each other of adjacent culverts (N + 1) in the cavity of the eye nut 11 of the culvert (N), while closely adhering and placing adjacent culverts (N + 1) to the culvert (N) Hook hook Rebar (10) to be inserted while the hook portion is connected. When the culvert (N) is in close contact with and connected to the adjacent culvert (N + 1), the culvert end mortar groove (18) forms an empty space along the four sides of the culvert, the hook reinforcement and the eye nut in the empty space It is connected like a male and female bond.

Adjacent culverts are in close contact with and connected to each other at the upper end of the culvert connection part, so that two holes 13 and 14 are formed, and the mortar 15 is injected through this hole to fill the empty space at the end connection part of the culverts. The gap between the culverts prevents the compressed mortar 15 from leaking out because the compressed index material 16 is kept airtight. At this time, it is confirmed that the mortar is ejected from the other hole 14 while the mortar is added to the mortar and the mortar is injected into the one hole 13 so that the mortar can fill the empty space tightly.

If the culverts are connected by the above process, the hook rebar 10 and the eye nut 11 connecting the culverts are connected to each other in the empty space of the individual culverts, and the mortar is tightly packed to secure structural safety and watertightness. can do.

▶ The connecting method of the culvert described above is arranged by the following process.

Step 1-Process of transporting the culvert of the above characteristics to the construction site after the factory is manufactured.

2nd process-A process of forming a group of culvert connectors to be connected in a single construction by adjoining and connecting adjacent culverts to one-time construction by combining several culverts in sequence at a planned pipeline position and connecting adjacent culverts with eye nuts.

3rd process-The process of filling mortar (15) in the individual culverts which comprise a group of culvert connectors.

If the whole plan culvert is divided into several groups by the above process, the entire plan culvert can be connected and constructed.

2. FIG. 2C is a cross-sectional view taken along line B-B 'of FIG. 2A showing a state in which the culvert is fully connected. Cage reinforcement (10) and culvert (N + 1) are connected to the reinforcing bar 10 and the eye nut (11) in the empty space of the mortar groove (18) formed by connecting like a male and female, and inside and outside the mortar groove 16) is installed to prevent the leakage of the injected mortar, and the empty space around the reinforcing bar and the eye nut is filled with the mortar (15). When manufacturing the culvert (N), the fixing rebar fastened to the eye nut is machined like a bolt and buried with a protective cap (not shown) on the bolt part, and when the culvert (N + 1) is manufactured, the hook rebar (10). The buried coupling nut 17 and the fixing reinforcing bar are buried so as to be fastened with the coupling nut 17. At this time, a thread protection cap (not shown) is installed inside the coupling nut. The protective cap and the protective cap are made of materials such as rubber, plastic and styrofoam, and are removed when the hook rebar or eye nut is fastened in the field. Hook reinforcing bars 10 fastened to the coupling nut 17 of the culvert N + 1 have a bolt-type end and can be manufactured by adjusting the length freely. If the gap between the gaps widens, the length of the rebar can be changed properly.

2. FIG. 2D is a cross-sectional view taken along line C-C 'of FIG. 2A, where the hook reinforcement and the eye nut connection are viewed in a plan view with the culvert fully connected. That is, FIG. 2C is a plan view.

2. Example 2 culvert connection method of the present invention

1. FIG. 3A is a perspective view of a series of culverts connected by hook reinforcing bars 10 and eye bolts 12 as a second embodiment of the culvert connection method of the present invention, and FIG. 3B is a sectional view taken along line A-A 'of FIG. 3A. Only the claw rebar and eye bolts are installed on the upper and lower slabs of the culvert, but the hook rebar and eye bolts can be installed on the side wall at the same time as the top and bottom slabs.

Cross-sectional shape and configuration of the culvert-The cross-sectional shape and configuration of the culvert is almost the same as described in Example 1. The only difference is that the 'eye nut (11)' has been changed from the culvert (N) to the 'eye bolt (12) + coupling nut (17)' and the installation direction of the hook reinforcing bar (10) and the eye bolt is 90 degrees in place. Rotated. In other words, in Example 1, the hook portion of the hook rebar was inserted into the cavity of the eye nut in the vertical direction. However, in Figure 3a, the hook portion of the hook rebar is inserted into the cavity of the eye bolt in the horizontal direction. The advantage of this connection method is that the hook length of the hook rebar can be installed longer than in the case of the first embodiment. In Example 1, the hook length is limited by the thickness of the upper and lower slabs of the culvert, but in this example, the hooks may be installed as long as sufficient length to secure the fixing force because the hooks are installed in the horizontal direction of the slab. On the other hand, the hook rebar 10 installed on the side wall is limited by the length of the hook side wall. However, hook bars installed on the sidewalls receive less bending moment and tensile force than hook bars installed on the upper and lower slabs, and can be tolerated because hook bars and eye bolts are rarely installed on the side walls.

Culvert connection method-Culvert connection is almost the same as described in Example 1. However, the difference is that in Example 1, the hook portion of the hook reinforcing rod 10 is inserted into the cavity of the eye nut 11 in the vertical direction, but in FIG. 3A, the hook portion of the hook reinforcing portion in the cavity of the eye bolt 12 is horizontal. It is inserted in the direction and connected. The connecting method of the other culverts is the same as that described in Example 1.

2. FIG. 3C is a cross-sectional view taken along line B-B 'of FIG. 3A to show the culvert is fully connected. Compared to Example 1, 'eye nut' was changed to 'eye bolt + coupling nut 17' in the culvert N, and the hook part of the hook rebar was inserted in the horizontal direction of the culvert. The rest of the configuration is the same as that of the first embodiment.

3. FIG. 3D is a cross-sectional view taken along line C-C 'of FIG. 3A, in which the eye bolt and the hooked reinforcing bar are viewed in a plan view with the culvert fully connected. That is, FIG. 3C is a plan view.

3. Embodiment 3 of the present invention culvert connection method

1. FIG. 4A shows a perspective view of a single culvert connected to a hook rebar 10 and a hook rebar as a third embodiment of the present invention culvert connection method. In this example, hook rebars are installed not only on the upper and lower slabs of the culvert but also on the sidewalls.

Cross-sectional shape and configuration of the culvert-The cross-sectional shape and configuration of the culvert is almost the same as described in Example 1. The difference is that the reinforcing bar is installed at one end of the upper and lower plate slabs and side walls of the culvert N, and the rebar is installed at the other end of the upper and lower plate slabs and the side walls of the adjacent culvert N + 1.

Culvert connection method-Culvert connection is almost the same as described in Example 1. The difference is that in Example 1, the hook portion of the hook rebar 10 is connected to the cavity of the eye nut 11 in the vertical direction, but in FIG. 4A, the hook hook is hooked to each other at the hook portion of the hook rebar. The connecting method of the other culverts is the same as that described in Example 1.

2 and 4B are cross-sectional views taken along line A-A 'of FIG. 4A, and show a case in which the anchoring rod in the culvert spherical body of the hook reinforcing rod 10 is combined with the lifting rebar of the culvert. In such a case, a sufficient anchoring length of the anchoring bar can be secured and the rebar can be saved. The rest of the configuration is the same as that of the first embodiment.

3. FIG. 4C is a cross-sectional view taken along line B-B 'of FIG. 4A to show the culvert is fully connected. Compared to Example 1, 'eye nut 11' was changed to 'hook rebar' in culvert N. The rest of the configuration is the same as that of the first embodiment.

4. FIG. 4D is a cross-sectional view taken along line C-C 'of FIG. 4A, where the hook and bar hook connections are viewed in a plan view with the culvert fully connected. That is, FIG. 4C is a plan view.

▶ FIG. 5a illustrates various shapes of the hook reinforcing bar 10 and the connecting ring. The hook and reinforcing bar illustrated in Figure 5a can be applied to connect the culverts in combination with each other, or in combination. Illustrated hook reinforcing bar and the hook may be a ready-made product, and may be used to process a steel bar, circular reinforcement or deformed reinforcing bar to a predetermined shape. The hook reinforcing bar may be manufactured without coupling coupling nuts or nuts as shown in 3 to 5 in FIG. 5A to bury the fixing reinforcing bar in the culvert, and the hook part may protrude. Such culverts are somewhat inconvenient to manufacture, but there is no economic benefit as there is no need to install coupling nuts or nuts. Protruding hooks are anticorrosive.

▶ FIG. 5B shows an example of reinforcing hook portion fixing force of the hook reinforcing bar 10. If you tighten the nut by processing the hook end of the hook rebar like a bolt, the mechanical resistance of the hook and tightening the nut will increase the area of acupressure resistance for the concrete, which will increase the anchoring capacity of the hook rebar. In addition, if the hook end of the reinforcing bar is machined and installed as a spatula, the area of acupressure resistance for concrete increases. If the hook ends are enlarged, the shear force and bending moment induced by the hooks will be increased.However, the shear force and the bending moment will not be so large that the cross section coefficient of the hooks will be shortened. An increase is a useful way to reinforce the hook's anchorage without the risk of breaking the hook.

1. Since the culvert is connected only with the connecting hook and the hook rebar 10, the cited draft can reduce the material and installation labor costs by eliminating the necessary horizontal and vertical steel bars.

2. Minimization of excavation width for culvert installation can reduce air shortage and construction cost.

3. The hook reinforcing bar 10 or connecting ring can be freely installed on the upper and lower slabs or side walls of the culvert, so that the flexural tensile strength of the culvert connection is much higher than when the eye bolt 12 is installed only on the side wall. In particular, Dalian culverts have a wide section for installing hook bars and linkages, which can develop joint strength that can sufficiently resist external forces.

4. The buried coupling nut 17 is embedded in the culvert, so that the protruding length of the hook rebar 10 can be freely adjusted, so that the hook rebar and the connecting ring can be easily connected even in the curved culvert.

5. When hook direction of hook rebar is installed horizontally from upper and lower plate slab, hook length can be lengthened and sufficient anchoring force can be secured.

6. The hook part of the hook rebar is widened to increase the area of acupressure resistance, or the bolt is attached to the hook part to secure sufficient fixing force even if the hook part is short.

7. The material reinforcement and installation labor cost can be reduced by using the fixed reinforcing bar in the culvert structure of the hook reinforcing bar 10 or the connecting ring with the reinforcing bar of the culvert.

Claims (5)

Mortar grooves 18 are provided at one end of the upper and lower plate slabs and sidewalls of the individual culverts, and index members 16 are provided at the inside and the outside of the mortar grooves, and hook bars 10 are provided in the mortar grooves. In the mortar groove, the culverts with the linkage or hook reinforcement in the mortar groove are brought into close contact with the adjacent culverts facing each other at the end, so that the hook part of the hook reinforcement is inserted into the cavity of the link or the hook part of the hook reinforcement. The culvert, characterized in that the mortar injection hole (13, 14) formed in the upper end of the culvert connecting portion is connected to each other by injecting the mortar (15) into the empty space of the mortar groove. delete delete delete delete

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