KR200272176Y1 - Displacement control device for LRB with restrict movement and correct expansion and contraction - Google Patents

Abstract

The present invention is when the construction of the bridge used for the lead-front support (LRB) and the elastic support used in the continuous extrusion method bridge (ILM), such as a method for sequentially pushing the bridge deck structure made on one side without using a general bridge and scaffolding It is a prefabricated and easy-to-install assembly mechanism that can be used as a shearing strain adjusting device to adjust the expansion and contraction capacity to meet the temperature conditions at that time after completion of bridge construction and bridge construction. It is a device that improves economic efficiency.

Description

Displacement control device for LRB with restrict movement and correct expansion and contraction

The present invention relates to a longitudinal horizontal shear deformation control device for the limitation of the movement of the seismic isolation bearing used in the general bridge and continuous extrusion method (ILM) bridge and the amount of expansion and contraction according to the temperature after the construction, in particular of the ILM bridge deck In order to suppress the shear deformation of the lead surface bearing support during extrusion of the bridge deck and the shear limiting device after the bridge construction, It is an economical and safety device that can combine.

Unlike general bridges, the ILM (Incremental Launching Method) method, which is a method of constructing bridges by continuous extrusion method, is a useful method of constructing bridge decks without using scaffolding in rugged areas with deep mountain valleys and valleys. Recently, it is one of the widely used methods in Korea and abroad.

However, in order to increase the seismic resistance in the bridges by the above-mentioned continuous extrusion construction, an appropriate bridge device should be installed at the site connecting the upper and lower structures of the bridge. Conventional conventional bridge devices are usually used for ILM pot bearings. However, this is a structure in which a rubber plate is put in a closed metal container, which has a certain degree of seismic resistance, but has been inadequate in this area because the concept of seismic design is gradually required in view of the tendency of earthquakes in various places around the world. .

Therefore, steel base separation device and lead rubber bearing (LRB) have been developed and applied as an earthquake bearing that introduced the concept of seismic design instead of the existing port bearing. Designed to absorb seismic displacements, they are already known from U.S. Patent Nos. 5,058,338, 4,117,637, 4,499,694 and the like.

On the other hand, the method used to construct the bridge using the seismic isolator of the seismic isolator is to install a specially designed temporary bearing on the pier or alternation instead of the installation device first, and then remove the temporary support after the continuous construction of the bridge top plate The construction process required to install the lead-in-placement support on the spot, which required complicated measures, required a lot of construction time and manpower, and a high frequency of safety accidents on the bridges, which required improvement measures. After completion, a separate device is needed to adjust the deformation amount according to the temperature, and the improvement on this is the movement limiting device (Domestic Patent Registration No. 1003130000) and the deformation amount adjusting device (Domestic Patent Application No. 10-1999-0000310). Although it was open to the public, each lacking part required better improvement.

The present invention solves the above-mentioned main problems, as well as after completion of the continuous extrusion construction of the bridge deck finally adjusts the horizontal shear deformation amount of the bridge device according to the temperature conditions at that time, the deformation amount for the expansion amount correction It is designed to be used as an adjusting device,

The present invention provides a fixed bracket that is easy to disassemble, assemble and install in a construction site so that the shear deformation of rubber can be suppressed at the time of continuous extrusion by directly installing a lead surface support plate without using any temporary support for ILM bridge continuous extrusion. It was developed as a temporary device consisting of fastening bolts to hold them firmly. In the conventional method, after the continuous extrusion construction of the bridge top plate was completed, a separate device was mobilized to adjust the longitudinal horizontal shear deformation amount according to the corresponding temperature conditions. It is a device designed to perform the device functions of.

1 is a schematic view of the seismic isolation construction state of the continuous construction bridge,

2 is a perspective view of a conventional movement limiting mechanism (A),

Figure 3 is a perspective view (B) of another conventional limiting mechanism of movement,

Figure 4 is a deformation amount adjusting device for adjusting the existing amount of stretching,

Figure 5 is a perspective view of the deformation adjusting device for the movement limit and expansion amount correction of the base isolation bearing according to the present invention,

6 is a cross-sectional view when used as a movement limiting device of the present invention;

Figure 7 is a cross-sectional view when used as a deformation amount adjusting apparatus of the present invention.

* Explanation of symbols for the main parts of the drawings

DESCRIPTION OF SYMBOLS 1 Lead-free seismic device 1a: Upper board 1b: Lower board 1c: Ruler

1d: Guidelines for measuring displacement

2: lower sole plate

3: Front fixing bracket 3a: Front stop bracket

3b: Hydraulic Jack for Strain Adjustment

4: rear fixing bracket 4a: rear stop bracket

5: Fixing bracket tightening bolt

6: manual hydraulic pump

Hereinafter, the present invention will be described with reference to the accompanying drawings.

Figure 5 is an exploded perspective view of the device and the lead according to the present invention, Figure 6 is a side view showing the coupling state, Figure 7 is a side view showing a coupling state at the time of shear strain adjustment, the movement according to the present invention The limiting role is that the upper and lower plates (1a) and (1b) of the lead-free support are made of metal sheet so that the lead-free support (1) is composed of rubber and lead and reinforcing steel plate. The rear fixing brackets (3) and (4) are fixed with primary bolts on the lower sole plate (2), and they are firmly fixed to each other by the fixing bracket fastening bolts, and to the upper inner side of the front and rear fixing brackets (3) and (4). The front and rear stop brackets (3a) and (4a) is assembled in a state of limiting the movement of the napyeonjin base 1 therein, Figure 2 is a conventional method related to this (Korean Patent Registration No. 1003130000) 3 is another method of limiting the movement of the present invention, One will.

In addition, it added an additional function, which adjusts the final shear deformation considering the temperature conditions at that time when the continuous extrusion construction of the bridge is completed. In this case, the front and rear stop brackets 3a and 4a are removed and the hydraulic jack 4b for adjusting the deformation amount is applied. ) Was operated after assembling, so that the calculated horizontal shear deformation could be matched, and FIG. 4 is an existing method related to this (Korean Patent Laid-Open Publication No. 2000-0050435).

At this time, in order to easily and accurately check the shear deformation amount, a ruler (1c) is attached to the upper plate (1a) of the lead-free earth support (1) in advance, and the displacement measuring guide (1d) ), So that the deformation amount generated in real time in the field can be confirmed.

The present invention is a device in which the movement limiting mechanism and the deformation control mechanism are improved and merged as well as additionally, the present invention is applicable to other seismic bearings in addition to the lead-proofing bearing, which allows the movement amount to be easily confirmed in real time in the field. The device can be reused after disassembly.

As described above, in the case of constructing the bridge using the apparatus of the present invention, it is not necessary to separately support the temporary construction during the continuous extrusion of the ILM bridge, and does not require a separate deformation control device after the extrusion of the bridge deck is completed. In addition, it is useful to improve the speed and speed of bridge construction as well as the safety and economic efficiency of the bridge as a deformation control device for moving limit and extension amount that can be attached and detached in the field.

Claims (1)

In the reinforcement sheet and lead core inserted therein, The front and rear fixed brackets (3) and (4) so that the upper and lower plates (1a) and (1b) of the lead surface bearing base (1) do not have relative displacements due to the transfer force received during the continuous extrusion construction of the bridge top plate. ) And the front and rear stop brackets (3a) and (4a) are assembled with bolts and fixing bracket fastening bolts (5) to control the amount of deformation operated by a manual hydraulic pump instead of the front stop bracket (3a) when the movement limit function and the horizontal shear deformation are adjusted. Strain adjustment mechanism for moving limit and expansion amount correction designed to assemble and use the hydraulic jack (3b).