Safety inspection apparatus for bridge using expansion joint with load cell and method for the same

A safety inspection apparatus for a bridge using an expansion joint with a load cell, the apparatus comprising:

• an expansion joint (260) including a machine part and a post-casting part installed in an expansion joint section between upper plates of a bridge (100), wherein a rail-type expansion joint-upper plate (263) of the machine part has one side connected to a machine part-upper plate (261) by a rotatable hinge (262) and a lower portion connected with an embedded anchor (265) embedded in post-casting part concrete (264) of a post-casting part, and the machine part-upper plate (261) has one side connected to the rotatable hinge (262) and the other side formed as a free end;
• at least one load cell (220) provided at a lower end of the free end of the machine part-upper plate (261) and configured to measure an axle weight and a total weight of a traveling vehicle (300) when the traveling vehicle (300) is on the machine part-upper plate (261);
• at least one measuring device (230) installed at the bridge (100) and configured to measure behavior of the bridge (100) when the traveling vehicle (300) passes over the expansion joint (260);
• a manager terminal (240) including a program to analyze the behavior of the bridge (100) according to a load and configured to check an overweight of the traveling vehicle (300) and inspect safety of the bridge;
• and
• an image capturing device for checking an overweight configured to capture an image of the traveling vehicle (300) to check whether the traveling vehicle (300) is overweight.

A safety inspection method of a bridge using an expansion joint with a load cell, the method comprising:

• a) an operation of allowing a traveling vehicle (300) to enter a bridge (100) with expansion joints (210 and 260) at which a load cell (220) is installed and to pass over the expansion joints (210 and 260);
• b) an operation of measuring, by the load cell (220), a load loaded on the load cell and including an axle weight and a distance between axles of the traveling vehicle (300);
• c) an operation of measuring, by a measuring device (230) installed at the bridge (100), behavior of the bridge (100) after the traveling vehicle (330) passes over the expansion joints (210 and 260);
• d) an operation of collecting, by a data collector (241) of a manger terminal (240), data measured by the load cell (220) and the measuring device (230);
• e) an operation of determining, by an overweight determination unit (244) of the manager terminal (240), whether the traveling vehicle (300) is overweight by comparing the data determined by the load cell (220) with vehicle database information stored in the manager terminal (240);
• f) an operation of capturing an image of the vehicle including a license plate of the vehicle to collect evidence when the vehicle is determined to be overweight;
• and
• g) an operation of inspecting, by the safety inspecting unit (246) of the manager terminal (240), safety of the bridge (100) according to the data collected by the load cell (220) and the measuring device (230) in real time,
• wherein the manger terminal (240) includes a program to analyze the behavior of the bridge (100) according to a load and is configured to check an overweight of the traveling vehicle (300) and inspect safety of the bridge.