Abstract：The railways intersect the lower Tunnels locally, it is necessary to adopt 3-D numerical analysis method to get the correct results comparatively. Based upon the engineering of three parallel shield tunnel under through the Shanghai-Hangzhou main railway in Shanghai Track Transportation No. 9 Line, the calculation model simplifying method was studied according to the pressure of lining crown(reference position). Firstly, the distribution law and diffusion extent of the crown pressure along the longitudinal direction were attained, also the nonuniformity coefficient Ku under the train moving loading by 3-D calculation. Secondly, a longitudinal 2-D dynamic model was established to study the relationship of Ku with the depth of the tunnel, and the results between the 2-D model and 3-D model in the same depth were checked. Therefore, we manage to simplify the 3-D model to 2-D model by adopting a synthesized loading deduction coefficient Kf, which was considered the influences of the diffusion extent, nonuniformity coefficient and the differential coefficient Km between 2-D model and 3-D model.
郑余朝 刘凯 罗川疆 仇文革 龚伦. 列车动载对下伏隧道影响的计算模式简化研究[J]. 土木工程学报, 2017, 50(S1): 25-30.
Zheng Yuchao Liu Kai Luo Chuanjiang Qiu Wenge Gong Lun. Study on simplified calculation model of dynamic train load effect on the lower tunnel. 土木工程学报, 2017, 50(S1): 25-30.
