KR100802336B1 - The use of the bearing installation is involved the precast block and it for construction method of the bearing installation and the replacing methodof bearing installation - Google Patents

Abstract

In the construction of all kinds of chairs, the method of manufacturing the precast chair block, which is the substructure of the chair, and the new construction method of the chair, the method of replacing the chair and the method of installing the chair A set of high tension bolts is used. First, the manufacturing method of the precast bridge block is turned upside down the lower plate of the bridge device, a plurality of internal reinforcement to the anchor, and then installed at least two pieces of prefabricated steel formwork upside down to expose the upper part of the internal reinforcement from the lower plate. After pouring the non-shrink mortar, and curing under water, the reinforcing bar is further reinforced by welding to the exposed internal reinforcing bar, and the leveling device is mounted on the slope of the reinforcing bar. Next, the new construction method and replacement construction method of the teaching apparatus is to position the precast teaching block on the block-out surface; Binding a plurality of high tension bolt sets to wrap the exposed reinforcing bars of the precast bridge blocks and the exposed reinforcing bars of the block-out surface from the lower side of the reinforcing bars to the upper side of the reinforcing bars; Filling the super-speed non-condensed cement milk into the space generated on the precast intersection block and the block-out surface; And the step of installing the elastic pad and the upper plate of the scaffolding device on the lower plate after curing of the super-speed non-contraction cement milk. The high tension bolt set is composed of a perforated plate nut and a tightening nut together with a "U" shape or a straight or "c" shape high tension bolt.

Description

The use of the bearing installation is involved the precast block and it for construction method of the bearing installation and the replacing method of bearing installation}

1 is a view schematically showing a commonly used teaching apparatus,

2 is a view showing a lower structure of a conventional teaching device,

3A is a view illustrating a state in which the substructure of FIG. 2 is set in a piers,

FIG. 3B is a view showing a state in which shrinkage mortar casting is completed in FIG. 3A;

4 is a view showing a state in which a seating apparatus is fixed to the precast seating block according to the present invention is installed,

5 is an exploded perspective view of an assembled steel formwork installed upside down for the production of precast bridge blocks,

Figure 6a is an exploded perspective view for assembling the top, bottom of the precast bridge according to the present invention, and

6B is a perspective view of the assembled upper and lower assembled blocks of the precast bridge according to the present invention.

<Explanation of the code | symbol about the principal part of drawings>

      50: precast teaching block 51: the bottom of the teaching apparatus

52: internal reinforcing bar block 53: steel formwork

54: reinforcement table 55: bolt for coupling

100: Precast bridge block and substructure including the bridge device

110: the upper plate of the bridge device 116: reinforcement of the bridge block

111: elastic device elastic pad 112: anchor fixing bolt

113: anchor 140: high tension bolt set

150: level control device

The present invention relates to a method of manufacturing a precast bridge block using upside down iron-assembled formwork that can be used for all types of bridge devices, a method of constructing a bridge device by a method of integrally fastening a bridge, and a method of replacing a device of a bridge device.

The bridge device is a mechanical device installed between the pier and the upper plate to safely transfer the load generated from the upper structure to the lower structure, and moves according to the expansion and expansion behavior of the upper structure due to constant temperature changes. Energy is reduced to thermal energy, and it is a device that functions to offset the vibration cycle of earthquakes by acting differently on the upper structure and the lower structure, and is essentially installed in small and large bridges as well as medium and large bridges.

One such a device is an elastic pad shoe (Rubber Bearing) type simply described as an example, the upper plate (5) is fixed to the lower surface of the bridge upper structure (3) as shown in FIG. And an elastic pad 7 interposed between the upper plate 5 and the lower plate 6 to support the compression and deformation forces of the bridge.

The upper and lower plates 5 and 6 in the pad shoe type chair 4 as described above are used to secure the shear deformation characteristics of the elastic pads 7 interposed therebetween. 6) is an important part that needs to be precisely constructed to secure the flatness of the bridge superstructure that will be constructed later.

Conventionally commonly used lower plate 6 is a quadrangular plate as shown in Figure 2, it is fixed to the coping (2) portion of the alternating or pier (1) through a stud bolt (8) fixed to the lower portion It is supposed to be. In installing such a lower plate 6, as shown in Fig. 3, a portion of the coping 2 of the alternating or pier 1 is cut out to secure a place for the stud bolt 8 to be embedded (hereinafter referred to as blockout). Next, after fully exposing the cushion reinforcing bar 11 for supporting reinforcement, coordinate surveying and plan height surveying are performed, and then the lower plate 6 is lifted and set using a crane. After setting the lower plate 6, the stud bolt 8 and the cushion reinforcing bar 11 are welded to prevent the lower plate 6 from moving.

Next, as shown in FIG. 3B, a form 13 for non-contraction mortar casting is installed around the lower plate 6, and the non-contraction mortar 12 is poured into the space between the side surface of the lower plate 6 and the form 13. After curing and demolding to complete the installation of the lower plate (6).

By the way, in the conventional construction method as described above, when the interference problem between the stud bolt (8) and the cushion reinforcing bar (11) occurs, the construction of the new reinforcing bar reintroduction after setting the lower plate (6) after cutting the cushion reinforcing bar (11) The method involves the process of economic losses.

In addition, there is a factor that can be poor filling due to insufficient compaction or other factors on the bottom of the lower plate (6). In order to solve this problem, the filling state may be satisfactory by increasing the ratio of non-contraction mortar and water to the specification information, but the compressive strength is remarkably dropped, which may be a major cause of poor construction. In addition, since the curing process must be carried out in coping (2), working conditions are very demanding, so it is almost impossible to perform wet curing for more than three days according to the specification. It can be broken and rebuilt.

In addition, when the replacement device is carried out by the above method, the construction period is long, and second and third defects may occur. The replacement of the device is done in a very narrow place and requires an emergency, and it is a work that requires precise work.

However, the non-condensation mortar curing period is at least 3 days, and the minimum work period for completing the construction until the other continuous work generally takes about 7 days. During this period, the superstructure had to be left in a dangerous state.

The present invention was devised to solve the above problems, and an object of the present invention is to reduce the construction period, cushion reinforcement of bridge blocks and bridges, among other problems arising from bridge device construction process and bridge coping placing process. We will try to solve the problem of incomplete binding between the devices.

In addition, it is possible to improve the quality through underwater curing of precast bridge blocks and to suppress the occurrence of cracks after completion, and to provide a clean bridge block surface and the like or a perfect binding method with the shift.

In addition, the present invention is to perform a pre-cure cured by precasting the block in the course of the replacement of the replacement device, and to perform a precise replacement work by shortening the construction period and completely complement the problems of the existing method.

The present invention to achieve the above object,

In the method of manufacturing a precast bridge block fixed to the coping portion of the bridge,

An anchor is a bolted fastening method of the lower plate device;

Reinforcing a plurality of internal rebars to the anchor;

Placing at least two pieces of prefabricated steel formwork upside down to expose a portion of the upper side of the inner reinforcement from the lower plate to pour the non-contraction mortar;

Reinforcing the reinforcing bars with the internal reinforcing bars;

It provides a method of manufacturing a precast bridge block comprising a; step of curing in the water by mounting a horizontal adjustment device on the slope of the reinforcing bars.

Or, the present invention,

In the method of installing a new teaching device on the block-out surface of the coping unit or using a precast teaching block manufactured as described above, or replacing the teaching device,

Positioning the precast intersection block on the block-out surface;

Binding a plurality of high tension bolt sets to wrap the reinforcing bars of the precast bridge blocks and the exposed main bars of the block-out surface that overlap each other up and down, from the lower side of the main bars to the upper side of the reinforcing bars;

Filling the super-speed non-condensed cement milk into the space generated on the precast intersection block and the block-out surface;

After hardening the super-speed non-condensed cement milk, and installing the elastic pad and the upper plate of the teaching device on the lower plate; provides a method for constructing a teaching apparatus using a precast teaching block comprising the.

In addition, the present invention,

In the high tension bolt set used in the method of constructing the teaching apparatus using the precast teaching block as described above,

High tension bolt set;

"U" shaped high-strength bolts that wrap from the bottom of the reinforcing bar exposed to the block-out surface to the top of the reinforcing bars of the precast bridge block, perforated plate nuts inserted into the top of the high-strength bolts, and again the upper side of the perforated plate nuts. Provides a set of high tension bolts, characterized in that consisting of a fastening nut is fastened to the high tension bolt.

At this time, the high tension bolt set is a perforated plate nut disposed in the lower portion of the cast steel exposed on the block-out surface, at least two straight high-strength bolts coupled to the perforated plate nut through the reinforcement of the reinforcing bars and precast bridge block, Another perforated plate nut coupled to the upper portion of the bolt, and may be composed of a tightening nut fastened to the high tension bolt at the top of the other perforated plate nut.

Alternatively, the high-strength bolt set includes a bundle bar having a “c” shape wrapping bar on one side from the bottom of the reinforcing bar exposed to the block-out surface to the top of the reinforcing bar of the precast bridge block, and passing through the main bar and the reinforcing bar. It may be composed of a straight high-strength bolt coupled to the upper and lower portions, and a tightening nut fastened to the high-tensile bolt at the top of the bundle bar.

Hereinafter, with reference to the accompanying drawings will be described a method of manufacturing a precast bridge block according to a preferred embodiment of the present invention, a construction method and a high-tensile bolt set of the bridge device using the same.

Figure 4 is a view showing a state in which the stabilization device is installed in the precast bridge block according to the present invention is installed, Figure 5 is an exploded perspective view of the assembled iron formwork installed upside down for the production of the precast bridge block, Figure 6a Figure 6b is an exploded perspective view for assembling the top and bottom of the precast bridge block according to the present invention, and Figure 6b is an assembled perspective view of the top and bottom assembly of the precast bridge block according to the present invention.

4 and 6a, the substructure 100 including the teaching apparatus according to the present invention is a precast teaching block 50 is settled in the coping of the alternating or piers, and the seat settled in the bridge block 50 There is a device bottom plate 51, elastic pad 111, top plate 110, the reinforcing bar 116 of the bridge block 50, which is engaged with the main reinforcing bar 117 of the coping part, the reinforcing bar 116 and the coping part It consists of a high tension bolt set 140 and the horizontal adjustment device 150 for fixing the main reinforcing bar 117.

In this case, in order to manufacture the bridge block 50, as shown in FIGS. 5 and 6A, first, a bridge device to be newly constructed is prepared. Then, an assembled steel formwork 53 suitable for the chair apparatus is prepared. Here, the seating device lower plate 51 adopts the bolt 112 fastening method to be separated from the anchor 113.

Anchor 113 is set upside down so that the lower platform 51 prepared as described above to look at the sky. And the internal reinforcing bar 52 is arranged in the longitudinal and transverse direction to the anchor 113. In this way, after the internal reinforcing bar 52 is placed on the anchor 113, the precast bridge block 50 is manufactured using the assembled formwork 53.

The assembled iron formwork 53 is installed upside down from the lower plate 51, and installed so that the upper portion of the internal reinforcing bar 52 is exposed. That is, when the lower plate 51, the internal reinforcing bar 52 and the formwork 53 are upright, the non-retracting mortar flows down to expose the internal reinforcing bar 52 to the lower side in the process of pouring the non-contraction mortar. Becomes too hard. If, after removing a portion of the internal reinforcing bar 52 to the outside using a styrofoam or other plates, even if the non-shrink mortar is poured, the outer surface of the completed precast bridge block 50 does not come out clean.

Therefore, the lower plate 51 to which the inner reinforcing bar 52 is coupled upside down, and the mold 53 is installed upside down so that the upper part of the inner reinforcing bar 52 is exposed, and then the non-contraction mortar is poured into the inner reinforcing bar 52. This perfectly exposed precast intersection block 50 can be obtained.

Preferably, the prefabricated iron formwork 53 may be divided and used to facilitate transport and to be convenient for use. That is, it is cut into the center of the opposite edge and divided into two pieces or four pieces. At this time, in order to give the rigidity of the iron formwork 53 to the assembled formwork iron formwork 53 to prevent the reinforcing bar 54, the divided iron formwork 53 is a bolt, as shown in the detailed view of FIG. Coupling with nut fastening method (55).

Prefabricated iron formwork 53, even if the shape of the device is a circular or special polygonal shape, the shape of the block 50 is generally rectangular, so it can be applied to almost all of the device just by changing the size.

The micro-gaps generated on the bottom surface of the chair lower plate 51 and the steel assembly formwork 53 are sealed using silicon or the like.

The plurality of reinforcing bars 116 are further reinforced to the exposed internal reinforcing bar 52 of the bridge block 50 by welding. And, as shown in Figure 6b to the slope of the reinforcing bar 116 is welded and attached to the horizontal adjusting device (150).

Then, the non-shrink mortar is blended with the mixed water according to the specification of the mixing ratio and poured. When the surface is hardened by hand when pressed by hand, it is immersed in a water tank and subjected to underwater curing.

In this case, when performing the replacement of the device, the material may use a super-speed non-shrink mortar.

After curing is completed, the precast bridge block 50 is completed, and after performing the coordinates, planing surveying so that the precast bridge block 50 can be installed in the blocked-out state of the bridge or the alternating coping surface, using a crane. The precast intersection block 50 is set at the blocked-out portion of the coping portion.

6A and 6B, the setting is first performed using the leveling device 150 installed on the slope of the exposed reinforcing bar 116 of the precast bridge block 50, and then adjusted to a height suitable for the plan. After the fixed binding using the high-strength bolt set 140 designed to bind the reinforcing bar 116 of the ping portion cast reinforcing bar 117 and the precast bridge block 50, between the precast bridge block 50 and the existing sphere After filling the gap using the supersonic non-shrink cement milk devised for the present invention, the elastic pad 111 and the upper plate 110 are assembled to complete the construction.

Here, some examples in which the main reinforcing bar 117 and the reinforcing bar 116 are coupled by the high tension bolt set 140 will be described.

First, as shown in detail type 1 (type1) of FIG. 6A, a U-shaped high-strength bolt 118 is provided, and the high-strength bolt 118 is inserted into the bottom of the main reinforcing bar 117 to the upper part of the reinforcing bar 116. After arranging to wrap, it is inserted into the upper portion of the high tension bolt 118 with the perforated plate nut 122, and is fastened to the high tension bolt 118 with the tightening nut 123 again.

Second, as shown in detail type 2 (type2) of FIG. 6A, after the perforated plate nut 122 is disposed below the main reinforcing bar 117, two or more elongated high-strength bolts 119 are disposed between the main reinforcing bars 117 and the reinforcing bar ( 116 is fastened vertically to the perforated plate nut 122, and then insert another perforated plate nut 122 on top of the high tension bolt 119, and tightening the tightening nut 123 on the high tension bolt (123). 119).

Third, as shown in the detail type 3 (type3) of FIG. 6A, the long straight high-strength bolt 120 is vertically placed on the main reinforcing bar 117 and the reinforcing bar 116, and then the "c" shaped bundle bar 121 is used. The bundle bar 121 is inserted into the upper and lower portions of the high tension bolt 120, and the tightening nut 123 is fastened to the upper side of the high tension bolt 120.

On the other hand, in the case of performing the replacement of the device, after manufacturing the precast bridge block 50 suitable for the designed bridge block to raise the upper structure of the bridge using the hydraulic jack, after removing the bridge device to be replaced, the designed Perform a blockout of size.

After placing the precast bridge block 50 for the bridge device on the block-out surface, the reinforcing bar 116 of the precast bridge block 50 and the main reinforcing bar 117 of the bridge or alternating high tension bolt set 140 are designed. Unite with). The binding method is the same as the construction method described above.

Filling operation is performed using super-speed non-condensed cement milk because small gap is generated in the precast bridge block 50 for the installed bridge device and the bridge block out surface generated in the coping of the bridge or bridge. When the design compressive strength is manifested, the hydraulic jack is removed to securely position the upper structure of the bridge on the top plate 110 of the bridge device.

The replacement of the device is completed by fastening the upper plate and the upper structure of the seat.

As described above, according to the present invention, the fastening of the precast bridge block for the bridge device and the main reinforcing bars of the bridge is easy and perfect, thus enabling precise construction.

In addition, by curing the precast bridge blocks in water, the design strength can be stabilized and uniform quality can be expected.

In addition, by making precast blocks in the field, material losses can be minimized.

In addition, the steel prefabricated formwork for manufacturing the precast bridge block for the device is very economical because it can be used semi-permanently in a single production.

In addition, even when the space between the precast bridge block and the block-out is narrow, perfect binding can be achieved by using a high-tight bolt for binding that is designed to facilitate the connection between the bridge block and the bridge or alternating main bars.

In addition, since the anchor embedded in the precast bridge block is bolted with the bridge plate of the bridge device, it is designed to facilitate the replacement of the bridge device in the future.

In addition, the precast bridge block for the bridge system is designed to be set as soon as the bridge or bridge coping part reinforcement is completely assembled during the construction process of the bridge or bridge, so that it can be carried out integrally during the concrete placement of the bridge or bridge coping part. .

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims. Will understand.

Claims (5)

As a method of manufacturing a precast bridge block fixed to the coping portion, Anchor 113 upturning the lower device plate 51 of the screw fastening method 112; Reinforcing a plurality of internal reinforcing bars (52) to the anchor (113); Placing at least two pieces of assembled iron formwork (53) upside down to expose a portion of the upper side of the inner reinforcing bar (52) from the lower plate (51) to pour anhydrous mortar; Reinforcing the reinforcing bars 116 to the exposed internal reinforcing bars 52 by welding; And Mounting the horizontal adjustment device 150 on the slope of the reinforcing bar (116) for curing in the water; manufacturing method of the precast bridge block comprising a. In the method of installing a new teaching device on the block-out surface of the coping portion or using a precast teaching block 50 manufactured from claim 1 or replacing the teaching device, Positioning the precast intersection block 50 on the block out surface; The reinforcing bar 116 of the precast bridge block 50 and the exposed cast iron bar 117 of the block-out surface from the lower side of the main bar 117 to the upper side of the reinforcing bar 116 overlapping each other up and down. Binding using a plurality of high tension bolt sets 140 to be wrapped; Filling a super speed non-condensed cement milk into a space generated on the precast cross-block 50 and the block-out surface; And After curing of the super-speed non-condensed cement milk, the step of installing the elastic pad 111 and the upper plate 110 of the teaching device on the lower plate 51; using a precast intersection block comprising a How to install the device. delete delete delete

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