Abstract The mining method with soil reinforcement is now mainly adopted in the construction of cross passages of shield tunnels, which is characterized by high risk and complex working conditions. In this paper, based on the adoption of a specially developed rectangular pipe-jacking machine with a planetary cutterhead, full-face cutting tests are carried out on concrete samples of different strength grades. Research on cutting-tool selection and layout, as well as the machinability of pipe-jacking with a planetary cutterhead, are undertaken, providing a technical reference for future cross-passage construction in shield tunnels adopting pipe-jacking to cut concrete composite segments, thereby refraining from exposing the reinforced soil mass due to segment removal, and greatly reducing the construction risk.
Abstract：
The mining method with soil reinforcement is now mainly adopted in the construction of cross passages of shield tunnels, which is characterized by high risk and complex working conditions. In this paper, based on the adoption of a specially developed rectangular pipe-jacking machine with a planetary cutterhead, full-face cutting tests are carried out on concrete samples of different strength grades. Research on cutting-tool selection and layout, as well as the machinability of pipe-jacking with a planetary cutterhead, are undertaken, providing a technical reference for future cross-passage construction in shield tunnels adopting pipe-jacking to cut concrete composite segments, thereby refraining from exposing the reinforced soil mass due to segment removal, and greatly reducing the construction risk.
WEI Lin-Chun
.Experimental Study on Full-Face Concrete Cutting by a Rectangular
Pipe-jacking Machine with a Planetary Cutterhead
[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(6): 173-178
2014, Vol. 51 