Yu Qian Highway Slope Excavation Numerical Simulation Of Stability

With China's rapid economic development, with the western development strategy, resource development and infrastructure construction is at an unprecedented pace, the ongoing construction of urban infrastructure, the ongoing large-scale exploitation of mineral resources. China has a vast, complex terrain, mountainous territory in China account for a large proportion of great changes in this terrain, geological structure is very complex area to build hydropower projects, the public, railway engineering and mining engineering, infrastructure works to excavation of rock and soil will inevitably need to, so they are bound to form a large number of engineering slope. In order to protect the natural environment and achieve sustainable development of economic construction; for the prevention and reduction, greatly limits to reduce losses caused by geological disasters; for the guidance of infrastructure, urban construction and economic development planning, to achieve harmonious development between man and nature, very necessary to the stability of the slope of a systematic summary and.Simulated using the finite element method, deformation of rock slope stability of the excavation, excavation of the Chongqing-Guizhou Expressway as the basis to establish realistic project finite element numerical model to simulate the excavation slope Chongqing and Guizhou Expressway support, an analysis of slope stability under excavation. This article first impact factors were slope stability analysis, slope stability analysis methods are introduced. Then a detailed description of numerical simulation of slope calculation principles and methods. Focus on finite element method in engineering applications, and how large general-purpose software ansys through to achieve the slope excavation simulation. Finally, based on the project through a combination of excavation slope stability analysis.Post the second chapter the concept of slope stability have been described, generally refers to the slope of the soil with a rake or rock slope, slope stability analysis of the general safety factor of slope stability through measured. Also in this section the classification of the slope made a detailed introduction, the classification of the slope to make a better understanding of the slope, and better stability on the analysis of different slope. The article also describes the slope stability factor, and two traditional methods of slope stability analysis done in detail.In the third article in the finite element method first a brief introduction, including the advantages of the finite element method and the finite element method of problem solving steps of the summary; the development of the finite element method, finite element software has also been widely used The article on large-scale finite element software ANSYS, a brief introduction, the paper will use the ANSYS software to simulate the actual engineering analysis, taking into account the special nature of rock, paper rock constitutive model were discussed, selected Drunker -Prager model for the analysis of this object. Nonlinear solution for the case of rock, post rock excavation on the mechanical behavior of nonlinear analysis, the final chapter of the ANSYS simulation of slope in the concrete application of the construction of a detailed description, including the initial stress simulation and the simulation Excavation and construction process simulation.Chapter four core chapters of this article, the article with this chapter based on the project, the use of finite element software ANSYS, slope excavation was simulated, the results can meet the engineering requirements. This section first overview of the actual works carried out briefly, then the actual use of ANSYS software engineering model, the slope of the excavation work condition were calculated and analyzed. Analysis is the stability of the slope to meet the actual requirements.Study reached the following conclusions:1. In the finite element analysis of slope, the slope rock mass model is of crucial importance, the article according to the nature of rock slope, choose the Drunker-Pager model analysis. Practice shows that this model can reflect the mass of the plastic nature of the use of non-linear method in the calculation, but also to avoid the use of traditional linear method that can make the results closer to reality.2. Article on numerical simulation of slope, using the ANSYS software, the software used in the calculation of the slope can be activated by cell to kill and slope excavation and support of simulation. ANSYS also be able to load into a series of load increment, you can load one or more incremental steps Neishijiahe set. This feature not only reflect a certain stage of construction of the stress-strain conditions, but also to approximate the structure itself changes with the construction process. The excavation process to determine the stability problem may exist.3. In three condition slope stability analysis, concluded that the slope is basically in a stable condition, but due to spring deformation after excavation, the slope of the sliding trend of the existence of certain, it is necessary for the support cutting slope.