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| Research on the Construction Technology of Large Cross Section of Chongqing North Railway Station |
| HUANG Ming -li1，NING Rui2，QU Xiao - wei1，TAN Zhong - sheng1 |
| (1. Tunnel and Underground Engineering Research Center of Ministry of Education，Beijing Jiaotong University，Beijing 100044，China; 2. China Railway Development Investment Group Co. Ltd，Kunming，Yunnan 650100，China) |
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Abstract Abstract ： Research purposes ： The challenges caused by the construction of the near distance cross tunnel are increasing. Relying on the Chongqing North Railway Station line 10 and loop line cross transfer station project， this paper makes a comparative analysis of tlie stress，deformation and measured data，by means of numerical calculation， theoretical analysis，and field monitoring data，to determine the reasonable construction scheme，to provide reference for similar subway projects. Research conclusions:(1) We chose the first scheme in three alternatives ： that is line 10 first excavation and followed by line 10 lining. (2) By the numerical simulation of a cross section of tlie program，the maximum settlement and the maximum uplift were 8.2 mm and 4. 04 mm，which are not more than the safety range. (3) The measured data shows that t!ie ground building maximum settlement value is 1.30 mm，the maximum convergence value is 12. 53 mm (blasting disturbance)， the maximum settlement of crown is 7. 76 mm. The stability of tunnel surrounding rock can be well controlled by the method of excavation cross section， which further verifies the rationality of the selection scheme. (4) The research results can provide reference for the construction of Chongqing Metro station and ot!ier similar metro station.
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Received: 16 June 2016
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2017, Vol. 34 
