Design And Numerical Simulation For Excavations Suppotr In Suining Software Industrial Park Project

With the continuous development of economic construction in our country, our country’surbanization process also speeds up constantly. In the deep foundation pit engineeringconstruction of the center of the built-up urban area, how to control the deformation of soilaround the foundation pit and protect the adjacent buildings and underground pipelines hasalready become a hotspot of the geotechnical engineering. The choice of foundation pitsupport type is related to the geologic site conditions, the state of the environment, thegroundwater condition, the construction procedure, the technological process and thesurveillance measure. Different supporting form has its own scope of application, andpit supporting structure is a temporary support. If we pursue safety blindly, we will causeunnecessary waste. Therefore, we should look for a safe, economic and feasible supportscheme and reduce costs to achieve high economic benefits.Based on the project of Suining software industry park as the research background, bymeans of field investigation and related experiments, analysis and evaluation of the geologicalconditions of software industry park project in Suining city. Select the appropriate foundationpit supporting scheme for foundation pit excavation of the upper section: ABCD5.0m by1:0.4slope soil nailing wall, the lower part of the use of single fulcrum pile anchor retainingscheme of foundation pit excavation; DEFA segment1:0.35slope of slope soil nailing wallscheme. we design and calculat its supporting structure.On and support the process of FLAC3Dnumerical simulation of excavation, drawn ineach construction step, support structure deformation trend. In the process of foundation pitexcavation in0.0m~7.5m, due to excavation unloading, the bottom may appear bulgephenomenon. And as the foundation to continue excavation, uplift phenomenon disappears. Atthe same time, the displacement of foundation pit wall along with the increase of the excavation depth increases, the maximum value of foundation settlement is about7.5mm.Through the FLAC3Dof the supporting pile numerical simulation analysis, to get themaximum displacement of pile top is18mm.Monitoring of foundation data adopts the method of alignment of foundation pithorizontal displacement monitoring. Displacement of foundation pit on top of the14.3mm,supporting pile top displacement is12mm. This supporting measure we adopt can effectivelycontrol the deformation of foundation pit and impact little on the environment of foundationpit. Through the simulation results of FLAC3Dand supporting pile top horizontaldisplacement monitoring data analysis and comparison, the simulated values are larger thanthe measured value, but the site excavation numerical simulation reflects the deformation ruleand the actual monitoring data is consistent, the foundation pit supporting scheme isreasonable.