Countermeasures for Engineering Geological Problems Faced in Construction of Lanzhou Rail Transit
YAO Wei1, HONG Zheng2, LIU Meng-meng3, TAN Dong-sheng1
1.Northwest Research Institute Co. Ltd of CREC, Lanzhou Gansu 730000, China; 2.Lanzhou University, Lanzhou, Gansu 730000, China; 3.Gansu Survey and Design Institute for Geological Disaster Prevention and Control Engineering, Lanzhou, Gansu 730050, China
Abstract：Research purposes: The engineering geological and hydrogeological conditions are rather complex along the Lanzhou rail transit, with lots of the engineering geological problems due to the big variety of rock and soil types. In order to solve the engineering geological problems better in this paper, the introduction is given to the general situation and geological environment of the Lanzhou rail transit and the main geological problems, the countermeasures for them and the ideas on the survey are presented.
Research conclusions:(1)The main geological problems of the Lanzhou rail transit included the stability of the surrounding rock, the engineering water disaster, the seepage deformation, the engineering ponding after completion of the tunnel construction and the foundation settlement. (2)The various engineering problems faced in construction of the Lanzhou rail transit could be overcome or controlled by making the reasonable design scheme and taking the corresponding construction measures, such as using the New Austrian Tunneling Method, the shield tunneling method, the open cut method, the top-down method, the underground diaphragm wall and the isolation piles etc. (3) The various technical means should be used for the geotechnical survey for the rail transit. Besides, the routine geotechnical mechanics parameters should be well known, the parameters like the resistivity and foundation bed coefficient should also be considered. In addition, the differential and corresponding surveys should be conducted for the different construction methods. (4)This study results can be applied in treatment of the engineering geological problems in construction of rail transit.
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YAO Wei, HONG Zheng, LIU Meng-meng, TAN Dong-sheng. Countermeasures for Engineering Geological Problems Faced in Construction of Lanzhou Rail Transit. 铁道工程学报, 2013, 30(9): 1-6.
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2013, Vol. 30 
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