Underground Construction Mechanics Theory And Methods Of Computation

The underground space is developed by the development of city,so design of pit engineering and construction technique must be raised up to high level in order to adapt to deeper development of city underground space. So a new engineering mechanics branch which is deeply relative to engineering construction, construction mechanics, is formed.In this paper construction mechanics is introduced and analyzed, from which viscosity and construction and route of construction should be considered.Two methods are proposed in the paper for analyzing time-variation system of pit excavation. One way, time parameter is imported in present design method, and precise integral is used to viscoelasticity finite element system which can increase precision and make calculation convenient. The other way optimal follow-up control is imported in present design method, by which shaft control model is made and dynamic optimal follow-up control system of underground engineering if formed. This system can avoid construction blindness of circumstance object control by eliminating the factor of insecutity and uncertainty in each phase in order to make little loss at the final of engineering.