Earthwork excavation construction of a complex building programme
The underground floor of the complex building of the project, the elevation of the foundation pit bottom is -8.15M (excluding the elevation of the cushion cap and elevator shaft bottom), and the elevation of the surrounding natural ground is -1.5m, so the overall excavation depth of the foundation pit is 6.65m, the excavation is about 51000M3, and the filling is 5700m3; The first underground floor of the underground garage, the bottom elevation of the foundation pit is -7.1M (excluding the cushion cap), the overall excavation depth is 5.6m, the excavation is about 25000M3, and the filling is about 5300M3; The excavation depth of the complex building is 1.5M, the excavation is about 3600M3, and the filling is about 6500M3. The project site belongs to the coastal plain landform type in the southeast front of the Yangtze River Delta estuary in the subtropical monsoon climate zone, and the terrain is relatively flat. According to the elevation measurement results of each exploratory hole, the natural ground elevation (assumed elevation, the same below) involved in each exploratory hole on the site is 3.43m~4.17m, and the average elevation of the site is about 3.85m.