Abstract With the development of subway shield technology, the quasi- rectangular shield tunnel is gradually
coming to prominence. Since the effect of construction loads on the shield tunnel′s structure cannot be ignored, a field experiment regarding a lining′s structural behavior under the construction load was carried out to evaluate the mechanical effect of simultaneous grouting on the structural behavior of the lining, using the quasi- rectangular shield tunnel in Ningbo as an engineering model. Studies show that the area affected by grouting pressures is generally concentrated in a location approximately three segment rings away from the shield tail. Because of the grouting effect, the load on the lining structure during construction is higher than that in the final state, and the load distribution trends to be asymmetrical and the measured grouting pressure affected area is larger than shown by the design model.
Abstract：
With the development of subway shield technology, the quasi- rectangular shield tunnel is gradually
coming to prominence. Since the effect of construction loads on the shield tunnel′s structure cannot be ignored, a field experiment regarding a lining′s structural behavior under the construction load was carried out to evaluate the mechanical effect of simultaneous grouting on the structural behavior of the lining, using the quasi- rectangular shield tunnel in Ningbo as an engineering model. Studies show that the area affected by grouting pressures is generally concentrated in a location approximately three segment rings away from the shield tail. Because of the grouting effect, the load on the lining structure during construction is higher than that in the final state, and the load distribution trends to be asymmetrical and the measured grouting pressure affected area is larger than shown by the design model.
WANG Dong-Fang- 1 Zhang-Wei-Xi- 2 Dong-Zi-Bo- 1 Liu- Xian- 2 Zhu-Yao-Hong- 1
.Experimental Field Study on the Structural Behaviors of the Linings of Quasi-Rectangular Shield Tunnels[J] MODERN TUNNELLING TECHNOLOGY, 2016,V53(6): 174-181
2016, Vol. 53 