Physical Model Test for the Interaction on Circular Cross-Section Tunnel Crossing Ground Fissure with 60°

Abstract:

Physical model test about the interaction between tunnel structure and soil under circler tunnel crossing the ground fissure belt with 60° was carried out, measuring the longitudinal strains of structure, the relative displacement at the bottom of the tunnel and the surrounding rock pressure. The test results show the deformation on the tunnel structure with circular cross-section is a composition of bending, shearing and twisting. The main deformation in first stage of settlement is bending, but the twisting deformation is more outstanding after the void appears at the bottom of the tunnel. Structural deformation in hanging wall is larger than that of the footwall, whereas structural stress in footwall is larger than that of the hanging wall. The segmentation of lining tunnel structure should be utilized to fit the distortion, bending and shearing in the metro tunnel aslant crossing the ground fissure belt. Twisting action should be considered in the structural design, and the tunnel structure in footwall should be strengthened by using high-performance concrete.

• Periodical: Advanced Materials Research (Volumes 261-263)
• Pages: 933-937
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.261-263.933
• Online since: May 2011
• Authors: Kai Ling Li, Yang Liu, Yu Ming Men, Jing Ping Yan, Hong Jia Liu
• Keywords: Aslant Crossing, Ground Fissure, Interaction, Model Test, Tunneling Engineering

References

[1] HUANG Ji, Shang Shu Wei. Shanghai: Shanghai Ancient Books Publishing House, (1993).

[2] LIU Yuhai, CHEN zhixin, NI Wankui. A Study on Hazard-Forming Mechanisms of Geofracture and Land Subsidence and Control Countermeasure in Xi'an. The Chinese Journal of Geological Hazard and Control, 1994 vol. 5 supplement: 67~74.

[3] XIONG Tianfang, SHAO Shengjun, WANG Tianming, et al. Research on physical model experiment of Xi'an metro tunnel orthogonally crossing ground fissure. Rock and Soil Mechanics, 2010, 31(1): 179~186.

[4] HUANG Qiangbing, PENG Jianbing, MEN yuming, et al. Model Test Study on Effect of Ground Fissure on Open-cut Metro Tunnel with Integral Lining. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(11): 2324~2331.

[5] Kailing Li, Puqi Zhao. Interface mechanics of soil-metro tunnel on ground fissures. The 7th Asia Regional Conference of IAEG. 2009. 9: 667~673.

[6] ZHANG Jiaming. Research Ground Fracturing in the Region of Xi'an. Xi'an: Northwest University Press, (1990).

[7] HAN Zhujun, RAN Yongkang, XU Xiwei. Primary Study on Possible Width and Displacement of Future Surface Rupture one Produced by Buried by Buried Active Fault , Seismology and Geology, 2002. 24(2): 484~494.