In the past five years, more than 160 bridges have been successfully reinforced in more than 10 provinces and cities including Sichuan, Tibet, Shandong, Guizhou, Henan, and Yunnan, achieving direct economic benefits of more than 1.1 billion yuan and huge contributions. social benefits. Among them, the result of Chongqing's major scientific and technological research project "Development and Engineering Demonstration of New Technologies for Reinforcement, Repair and Treatment of Large and Medium-sized Bridges (CSTC2005AA6010)" won the first prize of Chongqing's 2008 Scientific and Technological Progress Award (ranked first). In the field of structural safety monitoring and evaluation research, the bridge remote monitoring safety evaluation system based on reliability theory was proposed for the first time at home and abroad (invention patent publication number: CN1740444), which successfully solved the key technical problems in bridge safety monitoring. The research results have been It was successfully applied to the first cluster monitoring system of a large-scale bridge built in China. In the past five years, the bearing capacity of 82 bridges has been scientifically assessed, which has played a positive role in ensuring the safety of these bridges and making scientific decisions for bridge managers. As a result, it has brought direct economic benefits of more than 300 million yuan and huge social benefits.
Backbone of scientific research - expert in bridge safety evaluation
Zhou Jianting, who just graduated from the road and bridge major of Chongqing Jiaotong University (formerly Chongqing Jiaotong University) in 1993, began to work with roads and bridges. Got in touch. At this time, a piece of news said: "Among the many bridges in our country, at least one-third have structural defects or functional failure risks of varying degrees, which require regular manual inspection. The inspection of each bridge costs tens of thousands of yuan or even "Millions of Yuan" put Zhou Jianting on the road of exploring "bridge safety evaluation".
Since bridge safety evaluation technology has just started in China, going to the library to check information and going to construction sites to test data has become all part of Zhou Jianting’s life. In 1996, when he was only 24 years old, he proposed and completed the research on "Recursive and Iterative Measured Bridge Influence Line Assessment Bridge Bearing Capacity Technology" for the first time in China. Since then, Professor Zhou Jianting has embarked on an arduous but fruitful scientific research path.
In his research, he found that the bridges in Chongqing, the "Bridge Capital", have been exposed to the "acid rain" environment for a long time, especially the erosion of the reservoir banks and even bridge foundations caused by changes in water levels during the Three Gorges reservoir formation process. Bridge safety issues have added many uncertainties. To this end, in 2000, he completed for the first time in China the main arch ring stone water erosion test and the bridge foundation water erosion test of the partially submerged bridge in the variable water level area of ??the Three Gorges Reservoir area to guide the safety of thousands of bridges on county and township highways in the Three Gorges Reservoir area. Sexual evaluation work. This achievement laid an important foundation for ensuring the safety of bridges in the reservoir area.
In 2001, Zhou Jianting first proposed the "safety evaluation technology of bridge monitoring systems based on reliability theory", transplanting the static, offline reliability design method of engineering structures into a dynamic, online remote-based The monitored bridge structure reliability evaluation is to evaluate the safety of the bridge in real time through dynamic, real-time and continuous massive monitoring data. It abandons the shortcomings of traditional bridge safety monitoring technology such as lack of reliable evaluation indicators and limited damage identification, and successfully solves the problem. Key technical issues in bridge safety monitoring. In 2002, Zhou Jianting was responsible for the core research work on safety evaluation of the national science and technology project "Research on the Development of Complete Sets of Remote Real-time Monitoring Technology for Safety of Large Bridges". He successfully applied the "safety evaluation technology of bridge monitoring system based on reliability theory" to " "Bridge Safety Remote Intelligent Cluster Monitoring System" has established the first remote bridge cluster monitoring and evaluation system in China, realizing cluster safety monitoring and evaluation of three large bridges that are geographically dispersed and have different bridge types. In 2005, the expert group identified the results as having reached the "international advanced level" and made a positive contribution to the intelligent development of bridge health monitoring in my country.
Professional technical expert - an expert in the renovation and reinforcement of old dangerous bridges
In addition to bridge safety evaluation technology, Zhou Jianting is also committed to the research of bridge reinforcement technology and has also achieved fruitful results. He proposed and constructed the "remote monitoring and evaluation system for bridges based on reliability theory" for the first time in China, and developed the bridge's "section conversion reinforced T-beam bridge technology", "external prestressed (longitudinal) reinforced hollow slab practical technology", " A series of major practical new technologies such as "Recursive and Iterative Bridge Influence Line Assessment Technology for Bridge Bearing Capacity" and "Complete Technology for Strengthening and Transformation of Non-Highway National and Provincial Highway Bridge Protection Systems" have completed the main arch circle block of partially submerged bridges in variable water level areas. There are many major experimental studies involving the safety evaluation, detection and reinforcement of bridges in the Three Gorges Reservoir area, including the stone water erosion test and the bridge foundation water erosion test.
This series of achievements has made my country's old dangerous bridge reinforcement technology more scientific and standardized, and has been successfully applied to dozens of bridges in the western region, especially Chongqing, saving the country more than 200 million yuan.
In the past five years, Professor Zhou Jianting has completed more than 30 major national, provincial and ministerial level projects, published 62 academic papers (parts), and obtained 5 invention patents and 3 utility model patents. The technical projects he has completed have won many national and municipal Science and Technology Progress Awards and Technology Invention Awards.
Pioneer in poverty alleviation through science and technology - a doer who supports transportation construction in old, young, border and poverty-stricken areas
Professor Zhou Jianting’s footprints can be found all over Bashan, Sichuan and snow-covered plateaus.
In Pingchang County, Bazhong City, Sichuan Province, a famous old revolutionary area, there is a catenary hollow stone arch bridge Yangtiangou Bridge with a main span of 70 meters. Due to various reasons, the main arch axis of the bridge was severely deformed, and the amount of deformation was the largest in the country. A well-known domestic university bridge inspection agency identified "...it is recommended to demolish and rebuild." The Pingchang County Government considered that if it was rebuilt, it would not only affect the reconstruction progress of the entire highway project, but also cause an economic loss of 4 million yuan. After learning about it, Professor Zhou Jianting took the initiative to volunteer and led the research team of Chongqing Jiaotong University to undertake the renovation project of the bridge. After careful analysis and repeated demonstrations, Zhou Jianting and his colleagues proposed five comprehensive reinforcement and improvement technologies, including "reinforced concrete hoop reinforcement technology based on dead load adjustment on the arch". After half a year of arduous reinforcement work, the Yangtiangou Bridge was completed and opened to traffic in April 2006. After testing by the bridge inspection agency, the reinforced Yangtiangou Bridge can fully meet the load operation requirements, and many bearing capacity indicators are better than those of newly built bridges. In addition, Zhou Jianting also successfully reinforced five dangerous bridges in Pingchang County, saving tens of millions of dollars in old districts. As an old revolutionary base area with an annual fiscal revenue of only 40 million yuan, the former head of Pingchang County deeply praised Zhou Jianting’s use of science and technology to support the construction of the old area, saying: “Dr. The six bridges reinforced by the county are tantamount to six 'monuments'!" The Pingchang County Party Committee and County Government made a special trip to the school to send a banner to Professor Zhou Jianting: "Scientific and technological research serves the old revolutionary base, and transportation construction benefits Bashan Shushui."
Located in Fengdu County in the Three Gorges Reservoir Area, there is a Panjiagou Bridge. This bridge, which invested 1.2 million yuan and was only used for 4 years, had 134 cracks in its bones and muscles. The nail barely holds up. In order to save the bridge, Professor Zhou Jianting performed an emergency "bandaging" operation on the bridge. The renovated bridge was put into use for thirty or forty years without any problems. This plan alone has saved the Fengdu County Government millions of dollars. After that, Zhou Jianting reinforced 4 bridges in Fengdu County, making great contributions to local traffic safety and economic development.