KR20010049102A - Pot Bearing for Monitoring of Bridge - Google Patents

Abstract

PURPOSE: A continuous monitoring pot bearing for a bridge is provided to measure the static and dynamic loads of an upper structure transferred to a lower structure without an extra device. CONSTITUTION: A round groove is placed on the inside of a pot(1). A cable connector mount(7) is installed in the side of the pot. Then, a load gage(3), a load gage cable and a cable connector(8) are installed. An inserted plate(2) is placed on the inside of the pot. A rubber plate(4) and a sealing ring(5) are installed in order. The load gage measures the static and dynamic loads for a regular monitoring system of a bridge. The load gage is installed on the lower side of the rubber plate in the pot. The production of the pot and the installation of the load gage are facilitated by using the inserted plate.

Description

Pot bearing for monitoring of bridge

In recent years, due to the collapse of large structures, the importance of the maintenance of the structure has been highlighted, the permanent monitoring system of the structure is urgently required. Currently, the maintenance technology of the bridge is mostly dependent on the naked eye, so it is difficult to prevent the failure of the structure in advance.

Bridge bearings are devices that have the purpose of transmitting the load acting on the superstructure to the substructure, and are important members related to the durability and safety of the bridge. However, due to the reasons of design and construction errors, a large number of cases have been applied to bridge bearings to shorten the service life of bridges or to increase the fatigue of bridge bearings and substructures due to dynamic loads. Therefore, there is a need for measuring static and dynamic vertical loads caused by self weight, damage and construction errors.

As mentioned above, there is an urgent need for a permanent monitoring system for structures. In addition, the installation of a separate vertical load gauge on the bridge for the continuous monitoring system is not only difficult to construct, but also causes various problems in the accuracy of the measurement data and the management of the load gauge.

Therefore, in the present invention, the load bearing is mounted on the port bearing, which is one of the bridge bearings, so that the static and dynamic loads of the upper structure delivered to the lower structure can be measured without a separate device. A load gauge that can measure not only static loads but also dynamic loads was selected, and a load gauge was installed to minimize the influence of external error factors as well as not affecting the durability of the load gauge inside the port bearing.

1 is a plan view and a front view of a permanent monitoring pot support according to an embodiment (fixed support type)

2 is an exploded view of parts of FIG.

<Explanation of symbols for main parts of drawing>

1: port 2: insertion plate

3: load meter 4: rubber plate

5: sealing ring 6: top plate

7: cable connector mounting hole 8: cable connector

9: Instrument

In the accompanying drawings, the fixed bearing type of the permanent monitoring port support for bridges is shown as an embodiment, in which FIG. 1 is a front view and a plan view, and FIG. 2 is a component development view. In addition to the fixed support type, it can be applied to the movable support type, and the movable support is divided into one-way movable support and two-way movable support.

First, an embodiment of a permanent monitoring port bearing for a bridge applied to the fixed bearing type shown in FIGS. 1 and 2 will be described. Fastening holes are provided at the edge of the port (1) made of steel or cast steel, with circular grooves in the center. Then, the cable connector mounting holes 7 for installing the cable connector 8 are placed on the side of the port 1. In the center of the circular groove of the port (1), place a groove for installing the load gauge (3), make a straight groove from here to the cable connector mounting hole (7), and then install the load gauge (3), load gauge cable and cable connector (8).

Then, a circular hole for fixing the load gauge 3 in the center of the insertion plate 2 is inserted into the port 1 to fix the load gauge 3. At this time, the upper surface of the load gauge 3 to match the upper surface of the insertion plate (2). This insertion plate 2 facilitates the manufacture of the port 1 and the installation of the load gauge 3. A rubber plate 4 is placed on the insertion plate 2, and a sealing ring 5 for preventing separation of the rubber plate 4 is placed on the upper edge of the rubber plate 4. The rubber plate 4 not only imparts a rotation angle to the port bearing, but also effectively transmits the vertical load to the load gauge 3 installed at the lower portion with an even vertical load distribution effect. Finally, the protruding surface of the upper plate 6 is inserted into the port 1 to mount the upper plate 6. At this time, the protruding surface of the upper plate 6 has a diameter as small as a certain margin compared to the circular groove size of the port (1). The margin is calculated by the angle of rotation that the base support will provide.

The permanent support of the movable bearing type port bearing provides a sliding surface to perform the function of the movable bearing type compared to the fixed bearing type, and the piston and the upper plate with the fluorine resin plate mounted on the upper part to transfer the upper load to the rubber plate uniformly. The difference is that an additional stainless plate is mounted on the bottom. And in the case of the one-way movable support type, the restraint wedge for inducing slip in one direction is additionally installed.

The description of the permanent monitoring port bearing of movable bearing type is as follows. Place a circular groove in the port (1) and install the cable connector mounting hole (7) on the side, and then load the load gauge (3), load gauge cable and cable connector (8). Then, the insertion plate 2 is placed inside the port 1, and the rubber plate 4 and the sealing ring 5 are sequentially installed thereon. The above structure and manufacturing process is the same as the constant monitoring pot stand of the fixed base type.

A piston having a fluorine resin plate mounted thereon to provide a sliding surface for carrying out the function of the movable support and to constantly transfer the upper load to the rubber plate 4 is inserted onto the rubber plate 4 inside the port. In the case of the piston used in the two-way movable support type, the circular fluorine resin plate which is a solid lubricant is mounted on the upper surface of the piston, and the lubricant storage groove is lubricated on the upper surface of the fluorine resin plate. The top plate is placed thereon, and a stainless plate having excellent flatness and smoothness is installed on the bottom of the top plate to smoothly slip with the fluorine resin plate.

And in the case of the piston used in the one-way movable support type, the constrained wedge protrudes in the center of the upper surface of the piston to guide the movement in one direction, and the semicircular fluorine resin plate, which is a solid lubricant, is installed on the left and right sides of the constrained wedge to store the lubricant on the upper surface of the fluorine resin. Leave the groove and lubricate. And the upper plate with the groove into which the constrained wedge protruding from the upper part of the piston is put. Make it happen smoothly.

The present invention can be used as a load monitoring device for the constant monitoring of the structure as well as to perform the role of the general port support at all times by the configuration and action as described above.

Existing bridge supports were designed and manufactured with the loads calculated during the design of the bridges and installed on the bridges, and they were not able to be correctly maintained and repaired until the defects in the operation of the bridge supports and the coping part were visually confirmed.

The present invention can be usefully used as a superstructure load gauge for the regular monitoring system of the bridge as well as serving as a general port support at all times in a relatively simple structure. Therefore, by using the present invention to build a permanent monitoring system of the bridge to enable simple and systematic maintenance can not only support the bridge but also prevent the damage of the entire bridge in advance. And it can be the cornerstone of the development of construction and maintenance technology based on reliable measurement data.

In addition, since the port bearing itself is not only a structural type capable of fully fulfilling the role of the load gauge, but also has excellent durability, it can be used as a load measuring device for structures and mechanical equipment having a large weight.

Claims (2)

Full-time monitoring port support for bridges with large load measuring capacity, with a load gauge (3) installed on the bottom of the rubber plate (4) inside the port (1) for measuring the static and dynamic loads The permanent monitoring port bearing for bridges according to claim 1, which facilitates the fabrication of the port 1 and the installation of the load gauge 3 using the insertion plate 2.