2.20 12 Professor Yang Huayong presided over the completion of "Key Technologies and Industrialization of Independent Design and Manufacture of Shield Equipment" and won the first prize of National Science and Technology Progress Award. In this project, Zhejiang University, Shanghai Tunnel Engineering Co., Ltd., China Railway Tunnel Group Co., Ltd., China Railway Tunnel Equipment Manufacturing Co., Ltd. and Hangzhou Boiler Group Co., Ltd. have overcome the key technologies of independent design and manufacture of shields, developed three categories of shield products: earth pressure, muddy water and composite, and realized "China design and China manufacture" of shields.
Professor Yang Huayong's team officially started the research from 1999. In 2002, with the support of the advanced manufacturing field of the National 863 Plan, we have long-term and stable cooperation with Shanghai Tunnel Engineering Co., Ltd., China Railway Tunnel Group Co., Ltd., China Railway Tunnel Equipment Manufacturing Co., Ltd. and Hangzhou Boiler Group Co., Ltd. After 12 years of key technical research, it has gone through research-design-manufacturing-engineering.
After seven years of key technical research, in 2007, with the support of the comprehensive cross-cutting field of the 973 Plan, three major international industry problems of "instability, failure and inaccuracy" of shield equipment were condensed. In shield tunneling, instability will lead to ground collapse, failure will lead to the failure of key components of equipment, which will affect the tunneling efficiency, while failure of criterion will lead to the deviation of tunneling direction and affect the tunnel construction quality. Around the "three lost" problem, three key technologies of pressure stability, load compliance and multi-system coordination have been overcome, and five technical difficulties such as dynamic pressure balance control, load compliance system design, power adaptive electro-hydraulic drive, attitude measurement and real-time prediction, propulsion rectification and compound control have been broken through, and three systems of pressure control, mechanism and drive and propulsion rectification have been developed.
After joint research, 1) invented the dynamic pressure balance control technology of the sealed cabin, which can monitor the pressure of the sealed cabin of the shield in real time and carry out multi-system coordinated control, so that the shield can always work in a state of balance between the pressure of the sealed cabin and the water and soil pressure, effectively avoiding ground collapse or uplift, and is the basic guarantee for normal construction; 2) The design method of load compliance of tunneling system is put forward, and based on this, the cutter head, propulsion and driving subsystem are developed, which reduces the impact of sudden load on equipment by more than 30%, thus reducing the failure rate of key parts of equipment by 4 percentage points, reducing the time of stopping work and replacing parts, and ensuring the normal tunneling speed; 3) The project team also realized the real-time accurate control of the shield posture and the prediction and correction of the propulsion posture, which solved the problem that the shield tunneling deviated from the design axis due to inaccurate tunneling direction. Industry-University-Research project team has successively obtained 77 authorized invention patents, registered software 16, formulated 2 national and industry standards, and published many high-level papers and 3 monographs. On this basis, research and development of earth pressure, mud pressure and composite shield series products.
This achievement has been used in four leading shield machine manufacturers in China, realizing the independent design and industrial batch production application of shield equipment, forming a number of shield industrialization bases in Shanghai, Zhengzhou, Chongqing and Xi 'an, and breaking the situation that "foreign shields" dominate the world. China Railway No.1, developed by independent technology, is the first composite shield in China. The section between Yingkou Road and Heping Station of Tianjin Metro Line 3 passes through landmark buildings which are particularly sensitive to ground deformation, such as Porcelain House and Bohai Tower. The local ground deformation is less than 2mm, and the ground buildings are intact. In 2009, the prototype of "Jin Yue" slurry shield jointly designed and manufactured by Shanghai Tunnel Engineering Company and Zhejiang University reached 1 1.22 meters in diameter, and the excavation task of Dapu Road Tunnel, a major supporting project of Shanghai World Expo, was successfully completed on time. The shield set a world record for the tunnel construction with the same diameter slurry shield with the minimum turning radius of 380m.
From 2009 to 20 1 1 year, 132 shields were produced by applying the project results. Due to the obvious advantages in technology and price, the self-made shield quickly occupied the market, accounting for more than 60% in the 20 1 1 domestic new shield market. These shield products have been completed in Beijing, Tianjin, Shanghai and Shanghai. It is estimated that by 20 15, the products designed and manufactured independently will account for more than 75% of the newly added domestic market.
Professor Yang Huayong's Industry-University-Research project team is developing in the direction of hard rock and super-large diameter roadheader, and the developed new products will be more applied to the excavation of large diameter tunnels in western expressways and long tunnels in rocky areas.