Numerical Studies On Transaction Of Underground Opening And Foundation Of High-rise Building

During the past several years after its being directly under the Central Government, Chongqing has not only developed rapidly in its economy, but also obtained enormous achievements in the municipal construction. Yet due to its constraints of geographical environment, the soil resource has become deficient. It has become more and more important to explore and utilize the urban underground space.Thus, for guiding the project during the municipal construction, it has more important realistic significance that exploring the rational utilization of the urban underground space and the mutual influence between underground excavation and high-rise building foundations. In this paper, the finite-element numerical analysis calculation is applied to the foundation of high-rise and multi-floor building and the evolvement law of stress and displacement of tunnel used by urban traffic to explore the mutual influence between the wall rock of underground space and high-rise building foundation, taking account of the specific construction situation in the "SANMU Garden" project in Dadukou district in Chongqing, from the perspective of underground space static-force structure stability analysis to open a underground tunnel with 6m in span and 7.5m in height for track traffic 20m below the surface. This paper, taking considerations of three different states, i.e. the natural state without any artificial interference, the state of high-rise buildings on the surface, and the underground tunnel state with excavation for track traffic, and four plane lines and four vertical lines, analyzes and studies the distributing law of stress and displacement of calculation section from the following aspects: (1) The main stress vectorgraph, displacement distribution graph(Ux, Uy) and chromatogram graph of stress isoline ( 1 , 2 , xy ) of section under different states ; (2) The contrastive distribution curve of stress (1, 2 , xy) of different plane and vertical lines under the same state; (3) The contrastive distribution curve of stress (1, 2, xy) of the same plane and vertical lines under different states, wishing to provide references for underground space utilization and project designing and construction of the tunnel under high-rise buildings in the future.