KR20060093092A - 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

The present invention discloses a substructure for a teaching apparatus that can be used for all kinds of teaching apparatus, and a method for constructing and replacing the teaching apparatus using the teaching apparatus. The substructure for the bridge device according to the present invention is a prefabricated formwork to form a bridge block including the non-contraction mortar portion located in the top of the bridge (Coping) and the reinforced reinforcement of the bridge and the reinforcement of the bridge exposed to the bottom of the bridge Includes one or more perforated plate nuts, high tension bolts and tightening nuts to connect.

In addition, the construction method of the bridge device using the substructure for the bridge device as described above after the coping (coping) reinforcement assembly of the bridge after the surveyed the height and coordinates of the precast bridge block including the bridge device to the surveying point After mounting, piercing coping (Coping) using the reinforcing bar and one or more perforated plate nuts by fastening and tightening work with a high-tension bolt is made to bind and then coping (Coping) concrete is poured.

In addition, the replacement construction method of the bridge device using the substructure for the bridge device is to produce a bridge block with a prefabricated steel formwork prepared by determining the size of the bridge block after the position of the reinforcement using the rebar probe to the position of the main reinforcement of the bridge piers. After using the hydraulic jack to raise the superstructure, remove the old seating device, perform the blockout of the planned size, and set the block for the precast seating device at the blocked out place. , After filling the cement-type cement milk in the gap generated between the existing sphere and the bridge block, if the appropriate compressive strength is expressed, the step of connecting the upper structure to the bridge device by down the hydraulic jack.

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 showing 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;

      Figure 4 is a view of a precast block for a teaching apparatus installed in accordance with the present invention,

      Figure 5 is an exploded perspective view of the iron formwork assembled upside down for the precast fabrication of the substructure according to the present invention,

      Figure 6a is a combined view of the precast block for the teaching machine according to the present invention,

      Figure 6b is a view showing a coupled state using a porous plate nut for coupling and a high tension bolt, tightening nut according to the present invention.

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

50: precast chair block for the chair unit 51: lower plate for the chair unit

52: bridge block reinforcing bar 53: precast steel formwork upside down

54: bending reinforcement table 55: coupling bolt

100: precast block and substructure including the teaching device

110: the upper plate of the bridge device 130: reinforcement of the bridge block

111: elastic device elastic pad 112: lower anchor fixing bolt

140: high-strength bolt for fastening the cast bar and the precast block

113: anchor fixed to the lower plate 150: leveling device

120: precast teaching block

The present invention is an upside down assembly of steel prefabricated formwork and a precast block and a piercing device installation work and a replacement device replacement work for manufacturing a precast block for a bridge device that can be used for all types of bridge device. It is about.

The bridge device is a mechanical device installed between the piers and the upper plate to safely transfer the load generated from the upper structure to the lower structure, and moves according to the expansion / expansion behavior of the upper structure due to constant temperature changes. Energy is reduced to thermal energy, and it is a device that has the function of offsetting the vibration period of earthquakes by acting differently on upper and lower structures. It is 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, which is briefly 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 stapling device 4 as described above are used to secure the shear deformation characteristics of the elastic pads 7 interposed therebetween. ) 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 made of a quadrilateral 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 the lower plate 6 as shown in FIG.

As a result, a portion of the coping (2) of the alternating or pier (1) is cut off to secure a space for the stud bolt (8) to be buried (hereinafter referred to as blockout), and then the fully exposed cushion reinforcing bar (11) for supporting reinforcement. After the coordinate survey and the plan height survey are carried out, the lower plate 6 is lifted and set by using a crane. After setting the lower plate 6, the stud bolt 8 and the reinforcing bar 11 are welded and fixed to the lower plate ( 6) Do not move.

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).

However, in the conventional construction method as described above, when the interference problem between the stud bolt 8 and the cushion reinforcing bar 11 occurs, cutting the reinforcing bar 11 and setting the lower plate 6 and then reintroducing new reinforcing bar again. Construction methods include economic loss processes.

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. Break the block and try to rebuild it.

In addition, when the replacement of the 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 performed in a very narrow place and requires an emergency. This is a construction 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 has been devised to solve the above problems, and an object of the present invention is to reduce the construction period, reinforcing bars and bridge chairs, among other problems arising in the bridge device construction process and bridge coping placing process during bridge construction. In addition, it is possible to solve the problems of incomplete coupling between the interdentals. Also, it is possible to improve the quality through the underwater curing of precast bridge blocks and to suppress the occurrence of cracks after completion. It is in the provision of the method.

In addition, the present invention intends to perform a precise replacement work by precasting the block in the course of the replacement device replacement work to perform curing in advance to shorten the construction period and completely complement the problems of the existing method.

According to the present invention, after checking the design dimensions of the bridge block, as shown in FIG. 5, the reinforcing bars of the precast bridge block are completely exposed by assembling the assembled steel formwork upside down:

Steps to adjust the precast to the designed plan and coordinates:

Bonding to fully exposed rebar and pier or alternating main bars using a bolt set consisting of a perforated plate nut designed for the process and a high tension bolt and tightening nut:

Filling with ultra-fast shrink-free cement milk formulated to suit the characteristics of this process:

It provides a method for constructing a teaching apparatus including a.

Here, using the rebar probe to determine the location of the bridge or alternating main reinforcing bars, determine the size of the bridge block out larger than the precast bridge block to be manufactured:

It provides a method of replacing the bridge device, including the step of positioning the upper structure of the raised bridge after filling the super-speed non-shrink cement milk.

Hereinafter, with reference to the accompanying drawings will be described a method of precast fabrication and installation of the bridge block according to the preferred embodiment of the present invention and replacement device including a precast bridge block.

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, Figure 5 is an exploded perspective view of the assembled steel formwork installed upside down for the production of precast bridge block, Figure 6a Precast bridge block and reinforcing reinforcing bars and reinforcing bars integrated with the bridge device according to the present invention is an assembly drawing of,

Figure 6b is a view of the coupling state and the seating device of the high-strength bolt for binding.

  Substructure for the bridge device according to the present invention, as shown in Figures 4, 6a, 6b, the bridge plate is fixed to the coping (2) of the alternating or pier (1) and the lower plate 51 is fixed to the bridge block, elastic There is a pad 111 and a top plate 110. A set of high-strength bolts for fixing the reinforcing bars 116 and 117 and the reinforcing bars 116 and 117 and the coping part 2 reinforcing bars, which are connected to the main bars of the coping part 2. 140 and the horizontal adjustment device 150 is made.

In order to manufacture the precast chair block 100 for the chair apparatus as described above, first, prepare a chair to be newly constructed. Then, an assembled steel formwork (FIG. 5) suitable for the chair apparatus is prepared. The lower plate 51 of the stabilization device adopts a bolt 113 fastening method so as to be separated from the anchor, and is fixed in a horizontal manner upside down on a flat bottom. Then, after fixing the assembly block by welding the reinforcing bar reinforcing bars 130 to the seat plate 51, the steel formwork (Fig. 5) should be installed upside down. Even though the shape of the device is circular or special polygonal, the shape of the block is generally rectangular, so it can be applied to almost all of the device.

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

 Then, the horizontal adjusting device is welded to the edge of the exposed slope of the reinforcing bar.

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

At this time, the material can be used for the super speed non-shrink mortar only if the replacement device is carried out.

When curing is completed and the precast bridge block is completed, use the crane to perform the coping and planing surveying so that the precast bridge block can be installed in the blocked-out state of the bridge or shift (1) coping (2). (2) Set at the block-out part of the part. High-strength bolt 140 designed to bind the main reinforcing bar and the precast bridge block 100 after adjusting it to a height suitable for the plan using the leveling device 150 installed at the corner of the exposed rebar of the precast bridge block. After the fixed binding using the ultra-fast shrinkage cement milk designed for the present invention to fill the gap between the precast bridge and the existing sphere after filling the elastic pad 111 and the top plate 110 by Complete the work.

In addition, in the case of performing the replacement of the device, after manufacturing the precast bridge block 100 suitable for the designed bridge block, the upper structure of the bridge is raised by using a hydraulic jack, and after removing the bridge device to be replaced, the designed Perform a blockout of size.

After positioning the precast bridge block 100 for the bridge device on the block-out surface, the reinforcing bar 130 of the precast bridge block and the pier or alternating main reinforcing bar using the designed high-strength bolt 140.

Filling operation is performed using super-speed non-condensed cement milk because small gaps are generated in the precast bridge block 100 for the installed bridge device and the bridge block out surface generated in the coping (2) of the bridge or bridge (1). do. 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 construction is possible.

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)

Prefabricated formwork of bridge blocks that are settled in the coping of bridge piers. In making the bridge block as a precast block Turn over the pedestal base plate and install the prefabricated steel formwork around it upside down: Step to fabricate the reinforcing bar exposed on the upper surface of the inverted prefabricated steel formwork by welding the reinforcing bar to the anchor integrated in the lower plate of the bridge system: Welding and attaching the leveling device to the edge of the rebar slope: A precast bridge block manufacturing method characterized by the above contents. A method of installing a teaching apparatus, characterized in that the precast teaching blocks are placed and set immediately after assembly of the precast teaching blocks and bridges or alternating coping cast iron bars. The step of fastening the precast intersection block and the existing sphere using the high tension bolt set designed in the present invention: Filling the space between the precast bridge block and the existing sphere using super-speed non-condensing cement milk: Method of replacing the teaching apparatus, characterized in that the above content. High tension bolt set including one or more perforated plate nuts and tightening nuts designed for various variations of high tension bolts integral with it.

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