Numerical Simulation And In Situ Testing On The Deformation Caused By Deep Foundation Excavation

Because the deformation in the soil in the construction process, deep excavationconstitute a different degree of hazard to surrounding buildings, undergroundmunicipal pipelines, urban road.The occurrence of major incidents due to thedeformation of improper control technique is not uncommon, resulting in hugeeconomic losses and even endanger the safety of human life. In this thesis, the deepfoundation excavation of soil deformation study aims to find the typical environmentof deep excavation pit support method, and some rules of the factors aroundfoundation surface deformation of the excavation depth, in order to further improvethe Foundation Pit Engineering Design, to provide a basis for safe and reliableconstruction.In this thesis,Practical engineering, for example, the horizontal displacement ofthe surrounding soil during excavation, the vertical displacement and strain law werestudied.In this thesis, using FLAC software, a numerical simulation model of Theyinxing Jinchuan building foundation pit has been established. A constitutive modelbased on the formation parameters was selected and boundary conditions set by theactual loads and constraints. Excavation process was numerically simulated and wehave obtained horizontal displacement contours and vertical displacement contoursand stress contours of the various conditions of pit deformation.Soil displacementform of the distribution of development with the excavation of the displacementvariation was analyzed and With the excavation of the soil stress distribution and thelaw of development were analyzed.As the project referenced in this article,use In-situ test methods, laid inclinometerhole and subsidence holes in the sections, monitor the displacement and settlement inthe level of the whole process of the soil excavation, and the the law of the soildisplacement and the law of strain under various conditions to be analyzed in the process of the pit excavationNumerical simulation results and in situ test results were analyzed to obtain thebasic law of Soil deformation caused by the pit excavation.The safety and reliabilityof the Foundation Pit design were verified.