Analysis On Influence To Existing Tunnel Of High-rise Building Cluster

In China, urbanization course currently comes into a period of quick development. Constructions of urban rail transit progress at a rapid rate. Subway tunnels interveins under the whole city, and becomes the main traffic artery. The safety and reliability of subway tunnels have direct influence on the healthy and stable development of the city. Simultaneously, following the rapid development of the city, land shortage and commercial development result in the huge demand for high-rise buildings. So, avoiding the case that tall building locates crossing the existing subway tunnel is difficult. And the high foundation stress induced by tall buildings will inevitably influence the existing subway tunnel. The method to estimate and judge this influence is a important subject in urban planning.The complexity and concealment of geological conditions makes this influence hard to analyses. Focusing on this problem, following work is done in this paper:Firstly, the present theories on finite element analysis are integrated, the simulation methods on soil-structure interaction are induced, and the computation software used in this field are introduced.Then, a method for analysis and judgment on the influence is proposed. By this method, the safety of the subway tunnel is estimated through the changes of the foundation stress field and deformation field of the high-rise building, and the additional stress and deformation of the subway tunnel. Based on an engineering case, the influence of pile foundation with/without raft of high-rise building cluster to the existing subway tunnel analysed and estimated systemically. And the method is proved to be effective and practicable.