Xinhua News Agency, Shanghai, March 2 (Reporter Wu Zhendong) The reporter learned from Tongji University on the 2nd that Mr. Sun Jun, a member of the Communist Party of China, a famous expert in geotechnical and underground engineering, the founder and pioneer of the discipline of underground structure engineering mechanics, an academician of the Chinese Academy of Sciences, and a professor at Tongji University, died at 21:58 on March 1, 2024 at the age of 98 in Zhongshan Hospital, Shanghai.
Sun Jun was born in Suzhou City, Jiangsu Province in October 1926, graduated from the Structural Group of the Department of Civil Engineering of Shanghai Jiao Tong University in June 1949, taught at Shanghai Jiao Tong University from 1951 to 1952, and taught at Tongji University in September 1952 after the adjustment of the national faculties. He used to be a member of the Council of Tongji University, the vice chairman of the Academic Committee of Tongji University, and the head of the Department of Structural Engineering.
Sun Jun has long been engaged in teaching, scientific research and engineering practice in the fields of geomechanics and engineering, tunnel and underground engineering, and has profound academic attainments and made outstanding contributions in the theory and application of geotechnical rheological mechanics, viscoelastic-plastic theory of underground structures, seismic and blast dynamics of underground protection engineering, and urban environmental geoengineering. He has participated in the research and construction consulting of a large number of major national engineering projects, and has won many national, provincial and ministerial awards.
Teachings will always be remembered, style will always be remembered, and examples will always be set by! "True Mr. Big, we will always miss you! ”…After the passing of Mr. Sun Jun, Tongji teachers and students expressed their deep remembrance and sincere admiration to this venerable Tongji scholar.
Fang Shouen, Secretary of the Party Committee of Tongji University, said: "Mr. Sun Jun is an outstanding representative of Tongji professors, and he is the inheritor, practitioner and disseminator of Tongji spirit and culture. Mr. Sun Jun has made remarkable achievements in tirelessly exploring scientific truths, persisting in practice, and promoting the close integration of theory and practice. We should learn from and inherit Mr. Sun Jun's distinctive spirit of educator and scientist, unite and struggle, serve the country through science and education, and make greater contributions to the construction of a strong country and the rejuvenation of the nation. ”
The bridge is my 'first love'".
When he was young, Sun Jun had the courage to devote himself to patriotic nursing school*** After the founding of New China, with the strong belief of "contributing knowledge and strength to the construction of New China", Sun Jun studied hard, studied diligently, practiced thousands of exercises, and laid a solid foundation of knowledge.
Sun Jun majored in civil engineering at university, and because of his good knowledge of Russian, he was appointed by the university as a technical interpreter for Snitko, a bridge expert from the former Soviet Union who worked in Tongji. This led him to focus on steel bridge structures at the beginning of his scientific research. He laughed: "The bridge is my 'first love'. ”
In the 80s of the 20th century, Sun Jun (left) supervised doctoral students. (Photo courtesy of Tongji University).
In 1960, in order to meet the urgent need of the country for underground engineering professionals, Tongji University appointed Sun Jun to be responsible for the establishment of the first major of "tunnel and underground construction engineering" at home and abroad, and served as the director of the first professional teaching and research department. Since then, he has been concentrating on the field of underground structures, and has been willing to dedicate himself to more than a year. He presided over and was responsible for the construction of China's first extra-large underground aircraft cavern and the supporting underground oil storage cavern project; As the person in charge of the overall design, he undertook the survey, design and construction of the pilot subway station project in Shanghai, and served as the technical expert for the construction of Shanghai's first Huangpu River Dapu Road Tunnel, Yan'an East Road Tunnel, Shanghai, Nanjing, Guangzhou, Ningbo and other cities.
The needs of the country are the direction of my efforts. In 1971, on a winter night in the countryside, he still insisted on gnawing on the original English book of "Rock Mechanics" under the oil lamp. In the decades that followed, he became the Vice President of the International Society for Rock Mechanics and the President of the National Group, and was awarded the honorary title of Fellow of the Society in 2015.
"Diligence" and "cherishing time as life" are Sun Jun's lifelong habits. The more you study, the more interested you become, the more you are interested, and the more you are interested, the more you will continue to climb one scientific peak after another. In 1997, he began to study the application of soft science (with a focus on artificial intelligence science) in geotechnical engineering, which has lasted for more than 20 years, and is one of the pioneers in this field at home and abroad.
Sun Jun is teaching. (Photo courtesy of Tongji University).
Academic research is not an ornament in the hall of the study hall of colleges and universities, and we cannot only be intoxicated with the pursuit of high and deep theories without connecting with the actual engineering. "Sun Jun's scientific research work has always been aimed at the national strategy and the needs of the country. The longest railway tunnel, the first longest highway tunnel, the first submarine and cross-river tunnel, the world's largest diameter soft soil shield tunnel, and the Qiantang River tunnel; The Yangtze River Jiangyin Bridge, Sutong Bridge, Hangzhou Bay Bridge, Hong Kong-Zhuhai-Macao Bridge, and the Shenzhen (Shenzhen) Middle (Mountain) Passage under construction are ...... dozens of extra-large span bridges and tunnels across rivers and seas and mountainsAs a technical expert, he presided over and participated in the survey, design and construction research of geotechnical and underground engineering and bridge engineering of major national engineering projects, and escorted the construction of many key projects in China.
At the same time, with more than 70 years of teaching, Sun Jun has carefully trained and guided more than 80 doctors and nearly 30 postdoctoral researchers.
Knowledge is an implicit function, and it exists in engineering practice."
Even at the age of 93, Sun Jun has to go out more than 30 times a year on average, and the figure of the slightly hunched appears on the construction site again and again.
As a 'doctor' who sees engineering diseases, if I don't even see a 'patient', how can I check my pulse and prescribe medicines? Sun Jun believes that only by experiencing the scene, seeing is believing, and verifying the body, can we make effective technical decisions with confidence.
In the vast land of the motherland, Sun Jun's busy figure is left everywhere. He said: "We must not shut ourselves up in the academic hall and do empty learning, theory to theory, and space to air, but we must let theory take root, blossom, and bear fruit in production practice." ”
As early as 1963, in the final review of 17 national major projects, the project "viscoelastic plastic theory of underground structures and its engineering application practice" led by 37-year-old associate professor Sun Jun won the first place. The appraisal opinion reads: "The results of this project have reached the international level in terms of the breadth and depth of theoretical discussions; What is more valuable is that the research results can be applied to engineering practice in a timely manner, and considerable economic and social benefits have been obtained. ”
In Sun Jun's view, doing scientific research is to raise the problems in engineering to the level of theory, and to give scientific answers from the essence and mechanism, rather than just copying the "norms" to solve them. After the phased results of the research come out, it is necessary to consider how to apply the results to engineering practice, and there is often a long distance between the two. "We need to feed back the results into the actual project, make further improvement, test and upgrade, and finally use it for the project, which is considered to have completed the entire research process. ”
Sun Jun at the construction site of the Hong Kong-Zhuhai-Macao Bridge. (Photo courtesy of Tongji University).
The practice of this concept is not easier even when you are on the sickbed. In 2008, when Wenchuan ** occurred, Sun Jun, who had just undergone heart stent surgery, strongly requested to be discharged from the hospital and went to the disaster area to investigate the site to contribute to the solution to the problem of the dammed lake at that time. Lying on the hospital bed, the old man collected as much relevant information as possible, conducted research on difficult problems, and wrote two research reports to submit to the Chinese Academy of Sciences.
Knowledge is an implicit function, which exists in engineering practice, and it is necessary to rely on basic skills to explore and obtain its optimal solution. Sun Jun adheres to this belief and persistently pursues scientific truth. He once braved the scorching heat of 44 degrees Celsius to travel from Urumqi to the Turpan Basin to carry out survey work; He also braved the severe cold of minus 18 degrees Celsius to inspect the deep shaft on the north bank of the shield tunnel that crosses the Yellow River on the middle line of the South-to-North Water Diversion Project, and struggled to descend to the ......bottom of the shaft more than 50 meters deep with an icy iron escalator in his hand
Always maintain the fighting posture of a young man.
From the Three Gorges Project of the Yangtze River, the South-to-North Water Diversion Project, to the first undersea tunnel in China, to the Hong Kong-Zhuhai-Macao Bridge, the construction of major national projects has condensed his outstanding wisdom and hard work;
He cares about talent training, and devotes himself to post-graduate education, and has delivered a large number of backbone ...... for the national geotechnical mechanics and engineering, tunnel and underground engineering construction undertakings
never say too old and too late to learn and to do.(Study, do things, never talk old, talk late.) Sun Jun often admonishes them with this. He once said with a smile to a student who was nearly half a hundred years old: "Life is just starting in 40, and you are not yet 10 years old this year." "In the past few decades, I have worked hard, and I have not dared to slack off for a day." ”
Sun Jun at work. (Photo courtesy of Tongji University).
Sun Jun has always maintained the fighting attitude of young people to forge ahead and fight. It is precisely because of his years of profound academic accumulation that he can always look at key scientific issues like a torch, accurately take the pulse, seek an understanding of the essence and mechanism, and seek fundamental solutions.
During the construction of the world-renowned Hong Kong-Zhuhai-Macao Bridge, Sun Jun led his team members to form a technical consulting team for the bridge island and tunnel project, contributing professional wisdom to the construction of the bridge. Mr. Lao frequently travels back and forth between Shanghai and Zhuhai, running around construction sites and conference rooms, and has participated in various technical risk assessment meetings, technical consultation and program demonstration meetings more than 40 times. From the beginning, he strongly recommended that "it is advisable to use submarine immersed tunnels", which he thought was the best solution, and finally won the approval of all parties; In view of the deep soft foundation section of the sea area of the transition section of the island tunnel, he strongly recommended the "compacted sand pile" composite foundation construction method that is compatible with the current flexible joints of the pipe section, and abandons the use of rigid long piles, and its scientific effectiveness has been fully proved by later engineering practice.
Sun Jun has always maintained the foresight and high sensitivity of a master of science to engineering problems. In recent years, he has paid close attention to new energy-saving and environmental protection technologies in tunnels and underground engineering, and has been expanding new research areas.
What are the new developments in the field of engineering in the future? ”
That is, artificial intelligence, big data, cloud computing, information and network technology in the design, construction and operation of civil engineering risk forecasting, image display and analysis, structural deformation control and special program software research and development and other sub-disciplines of development and innovation. At the academic seminar, Sun Jun earnestly admonished young people: "Through artificial intelligence technology, we can discover the key targets in engineering design and construction, design and optimize new and more creative civil structures, pre-control unexpected investment and construction risks, and effectively make up for the shortcomings and existing problems in traditional technology research and development, such as large investment, low efficiency, long cycle and slow transformation ......of achievements."These expositions deeply impressed the juniors present.
*:Xinhua.