Research On Analysis Of Deformation And Stability In Excavation Engineering

The technology of excavation engineering is developing rapidly because of amount of engineering construction and the complicated construction condition in modern time. Though Ministry of Construction of China has issued the industry standard-Technical Specification For Retaining And Protection Of Building Foundation Excavations (JGJ120-2012), there are some issues need to be concerned and discussed in daily excavation engineering design.The deep foundation center-island method is simply and economical, thus it has great advantage in large plan pit. This paper uses the value analysis method to analyze the retaining member in terms of stay around foundation soil under different soil quality and the calculation of the equivalent excavation depth of pit.The differences of the calculation of stability of resist pit upheaval are summarized and analyzed in this paper. Furthermore, we give the method of the calculation of stability of resist pit upheaval considering the pit depth effect and the analysis of sensitivities of different effective factors in terms of narrow excavation engineering (e.g., Metro Station).We experimental studied a long time on site for one sandy deep foundation in Hangzhou. After the research of construction condition and the time-space effect of deep excavation, we revealed the attenuation law of the horizontal displacement of outside soil during the excavation. This conclusion can give great reference for other similar excavation engineering design and construction in future.