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Optimization and Application of Installation Path of Prefabricated Structure in Large-diameter Shield Tunnel
(1. School of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620; 2. College of Environmental Science and Engineering, Donghua University, Shanghai 201620; 3. Shanghai Tunnel Engineering Co., Ltd., Shanghai 200032)
Abstract The traditional shield tunnel construction process has the problems such as unadvanced construction pro? cess of prefabricated members and low efficiency of construction. By analyzing the motion characteristics of the prefabricated members of shield tunnel in the installation process, the path of intelligent erection robot during installation of prefabricated members in the tunnel has been further optimized. According to practical installation of center diaphragms in actual tunnel projects, it is determined that the position and orientation of the internal structure on the transport vehicle must be planned according to the characteristics of the members and the working environment of the erector before path optimization is done. After the member is transported to its position, coordinate system must be created on the prefabricated member by using the right hand rule and the corresponding equation of motion must be established, to select the optimal motion path. At last, the erector control is further optimized according to the motion path. As the results indicate: (1) The intelligent center diaphragm erection robot can accomplish installation of the prefabricated members such as center diaphragm and arcuate member in a tunnel, its erection accuracy can meet the member installation requirements, and the motion execution accuracy of oil cylinder is up to 0.5 mm.(2) In the construction process that uses an intelligent erector, the installation error is reduced from 20 mm to 1 mm,and the number of arcuate members and center diaphragms installed in 24 h is increased to 30，35 respectively. (3)The installation path is optimized by using the position and orientation of center diaphragm and the equation of motion, to increase the center diaphragm installation efficiency in shield tunnel and enhance the control accuracy of construction with prefabricated members.
Abstract：
The traditional shield tunnel construction process has the problems such as unadvanced construction pro? cess of prefabricated members and low efficiency of construction. By analyzing the motion characteristics of the prefabricated members of shield tunnel in the installation process, the path of intelligent erection robot during installation of prefabricated members in the tunnel has been further optimized. According to practical installation of center diaphragms in actual tunnel projects, it is determined that the position and orientation of the internal structure on the transport vehicle must be planned according to the characteristics of the members and the working environment of the erector before path optimization is done. After the member is transported to its position, coordinate system must be created on the prefabricated member by using the right hand rule and the corresponding equation of motion must be established, to select the optimal motion path. At last, the erector control is further optimized according to the motion path. As the results indicate: (1) The intelligent center diaphragm erection robot can accomplish installation of the prefabricated members such as center diaphragm and arcuate member in a tunnel, its erection accuracy can meet the member installation requirements, and the motion execution accuracy of oil cylinder is up to 0.5 mm.(2) In the construction process that uses an intelligent erector, the installation error is reduced from 20 mm to 1 mm,and the number of arcuate members and center diaphragms installed in 24 h is increased to 30，35 respectively. (3)The installation path is optimized by using the position and orientation of center diaphragm and the equation of motion, to increase the center diaphragm installation efficiency in shield tunnel and enhance the control accuracy of construction with prefabricated members.
XUN Haolin1 LI Peinan2 LIU Jun1 SONG Xingbao3 QIN Yuan3 KOU Xiaoyong3 ZHAI Yixin3
.Optimization and Application of Installation Path of Prefabricated Structure in Large-diameter Shield Tunnel[J] MODERN TUNNELLING TECHNOLOGY, 2024,V61(1): 236-244
2024, Vol. 61 