Chanchun International Financial Centre Foundation Supporting Design Calculations And Numerical Simulation

Deep foundation pit bracing design is the current building area of geotechnical engineering hot, is also improving engineering quality reduce accident the major issues. Ever more deep foundation pit bracing design experience, is by no reliable calculation parameter selection basis, easy cause engineering accident, causing bodily harm and economic loss. In recent years, our country excavation engineering whether in theory or the design and construction of the informatization management aspect to the world level, and gradually to near industry-leading level.This paper according to changchun international financial centre excavation surroundings and engineering geological conditions, in accordance with the principles for selecting supporting schemes, determines the fulcrum pile anchor bracing plan more, and layered excavation method, the method of equivalent beam foundation pit supporting design calculation. This paper also adopts Wallace darth software on excavation of the stress, strain and displacement etc is numerically simulated. The conclusion of the paper are as follows:(1) is equal to or greater than the changchun city 20 meters of deep foundation pit supporting structure scheme selection more the fulcrum pile anchor bracing advisable.(2) equivalent beam method to calculate the length of the anchor in layered excavation method significantly short of anchor length, equivalent beam method calculation results more economy; Because when the excavation method in calculating by soil after excavation ignored the stress reduction, thus the calculated value is obviously too big.(3) through the finite element software to changchun international financial centre "Midas" pit numerical simulation knowable, according to the method to calculate the equivalent beam pile length completely meet the requirement of design, and make the pile anchor bracing design also is rational and feasible. Changchun international financial centre foundation pit excavation depth is the deepest of changchun city at present, the foundation pit supporting form, design and calculation method and simulation method, to the next similar foundation support design to have the certain reference value. While many methods in a pit supporting the application and using finite element analysis software, a numerical simulation of deep foundation pit bracing for future reference, the paper numerical simulation results is very important practical significance and application value.