Straach on the spot ｜ Early this morning, the monkey stone bridge ushered in the "deep medical examination"

Changsha Evening News, Changsha, July 24 (All Media Reporter Tang Dynasty Zhao) In the early morning of the 24th, the Monkey Stone Bridge ushered in a special "deep medical examination".

This is a load test for the bridge structure. That is, by loading the structural response of the bridge under the action of loading, the technical status and carrying capacity of the bridge are given "diagnosis", and the "good recipes" for future maintenance, maintenance, and reinforcement will be issued.

The combination of dynamic static, heavy card test bridge "pressure resistance"

At 1:00, traffic control began to the west to the east bridge to the west of the monkey stone bridge. After about half an hour, the bridge static load test officially started. 13 heavy trucks with a weight of 31 tons slowly drove to the main bridge surface by the ramp, waiting for the instruction signal issued by the test personnel.

The load test can be said to be a "pressure test" of a bridge, which is divided into static load test and dynamic transmission test. Among them, the static load test is mainly to measure the deformation and internal force of the static test load by measuring the bridge structure. The actual working state of the comparison of the bridge structure can meet the normal use requirements under the design load. Dynamic tests mainly determine the dynamic characteristics and impact effects of the bridge through pulse tests and driving tests to evaluate the power performance of the bridge.

The reporter saw at the scene that bridge testing personnel first set up precise levels on the bridge surface to measure the bridge deck data under normal state. Subsequently, heavy trucks drove to the specified measurement location in batches, and continued to "pressurize" until the bridge design bearing capacity. At the same time, the data in the test will be uploaded to the collection system in real time by installing the 77 induction terminals installed at the bottom of the bridge and indoors.

At 4 o'clock, the dynamic test began. Heavy trucks are driving back and forth on the bridge surface according to the test requirements, and gradually increased from 10 km/h to 60 km/h to provide testing data for testing personnel at different driving conditions. At about 5 o'clock, all the load test ended, and the Monkey Stone Bridge resumed traffic.

Sanxianji Bridge will also carry out load tests

"Monkey Shi Bridge has been opened to traffic for 22 years, and the current situation of the bridge needs to be comprehensively evaluated through the load test." According to the relevant person in charge of the Municipal Bridge Tunnel Affairs Center, this "deep medical examination" will be scientific evaluation of the technical status and technical status of the bridge and the technical status of the bridge and the technical status of the bridge. The carrying capacity ensures that the bridge can operate safely during the design service period.

The reporter noticed that this test only selected half of the bridge to the west of the bridge to the east. The person in charge of the bridge testing company told reporters that because the two bridges north and south of the Monkey Stone Bridge are actually separated, design standards, and construction time are the same. Therefore The "diagnosis" basis for the entire bridge.

It is understood that after the load test is completed, the inspectors will organize and analyze the data collected this time, and eventually issue the "medical examination report" of the bridge. In the next step, the Sanxianji Bridge will also carry out load testing according to the plan. At present, the approval reports such as traffic dredging are currently underway.

Since the beginning of this year, the bridge tunnel of Changsha City has aimed at "peace, smooth, clean, and beautiful", strengthened inspections on duty, safety inspections, maintenance and cleaning, and organized the second batch of bridge tunnel inspection work. Good situation.

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