A MONITORING AND STUDY ON UP AND DOWN CONSTRUCTION METHOD FOR THE DEEP EXCAVATION OF BUILDING IN SHANGHAI LIAOCHUANGXING FINANCIAL CENTER

In a 170.10m high and 37-storey super-tall building with 3-storey podium,excavation depth of 22.4～28.4m and an area of 5 151m2 in Shanghai,based on the theoretical concept and experience,it is analyzed that a great deal of monitoring results for horizontal displacements,bottom heave,differential displacements between diaphrgam wall and adjacent mid-post pile and between mid-post piles,bracing axial force and stresses in slab of floor for special deep excavation,and significant characteristics of stress and displacement for up-down construction method differing with normal construction method are also been obtained.Some suggestions on improving the design of up-down construction method for deep excavation engineering are presented,which may be an impartant reference for other similar projects.