Statistical Analysis And Prediction Of The Deformation Of Wukesong Subway Station Due To Being Crossed

In process of forming and completing the metropolis rail traffic network gradually in our country, the situation of new tunnel crosses existing urban rail transit subterranean line will appear more and more. Moreover, perturbations of surrounding soil are generated by the project of new tunnel, which will in turn lead to deformation of its existing tunnel and rail structure. With the development of deformation, it will influence the normal operation of existing line. If we want to solve the problem that how to minimize this adverse effects, which means it is not only to achieve the smooth construction of the new tunnel, but also to ensure the structural safety of existing lines and normal operation, we need to research the subsidence law of existing rail line.Based on the deformation monitoring data of Beijing Subway Line 1 Wukesong Station crossed by Beijing West 4th Ring Road tunnel of South-to-North water diversion, this paper researches the structural deformation law of existing line influenced by mining methods. The paper concludes as follows:1. In process of crossing construction, station bottom slab experiences the following process of change:stability before crossing, gradual subsidence during crossing, grouting uplift, gradual subsidence right along, subsidence slightly before and after running through, subsidence after construction, tending towards stability.2. In process of crossing construction, the settling amount of station structure is larger when it is more closed to crossing of central line. The subsidence data will rise several times, even a dozen times. The maximum data of subsidence of station structure movement joint appears directly over crossing of central line. Moreover, the data of subsidence is small in east and west of the central line.3. In process of crossing construction, the settling amount of road bed structure is larger when it is more closed to crossing of central line. The maximum data of subsidence of road bed structure movement joint also appears directly over crossing down central line.4. In process of crossing construction, it should focus on the part closing to central line, and increase the frequency of monitor. On the other hand, it could decrease the frequency of monitor concerning the part which is at a distance from the central line. To make a difference between necessary and unnecessary part can ensure the safety of crossing.Besides, based on the method of artificial neural network, this paper predicts the development of its structural subsidence, which indicates that the neural network model structure on the station bottom slab subsidence prediction is effective in the short term.