Finite Element Analysis Of Flexible Supporting In The Deep Excavation

With the current development of economy and the acceleration of urbanization, The development of underground structure of deep foundation pit engineering position is particularly important. Ensure the safety of foundation pit engineering is an important economic and social benefits. Traditional calculation method of foundation pit maintenance structure as equivalent beam method, the static equilibrium method, 1/2 segmentation method is established after earlier mostly wall of the limit equilibrium basis. This kind of method in general retaining wall has been widely used in the calculation. But for the excavation engineering in the widespread use of flexible supporting, apparently has many defects. Based on the development of soil resistance, although overcame limit equilibrium method of some deficiencies, Is the construction of foundation pit supporting technical specification recommended, The soil spring stiffness value from also accumulated experience, but because the upper each soils vary greatly, when choosing arbitrariness and big, will affect the accuracy of the calculation results. Taking a deep foundation pit in soft soil area for example, Using finite element analysis software MIDAS/GTS simulate each construction stage role in maintaining the earth pressure on the structure of deformation and maintenance structure, And with the measured data, based on the finite element numerical simulation and comparison, in order to rationality analysis for similar projects in the future and provide reference for the design and construction of practical engineering, the reference significance.