Progressive Failure Analysis And Anti Slide Design Of Foundation Pit In Fuping Power Plant Project

With the rapid development of domestic economy,the urbanization is developing faster and faster,which leads to the scarcity of urban land resources,thus promoting the development of high-rise buildings and the development and utilization of underground space.In the construction of underground buildings,excavation work must be carried out.When the foundation pit is excavated,the surrounding enclosure should be firstly set up,and the precipitation well should be constructed and the groundwater should be analyzed.In addition,protective measures are needed for surrounding buildings and various municipal pipelines.In this case,the research on deep foundation pit excavation and support technology becomes more extensive and deeper.In the excavation of deep foundation pit,the instability of slope is a major geological disaster,which has attracted extensive attention of all countries in the world.Therefore,based on the foundation pit project of fuping power plant project,the following research is conducted in this paper:at present,domestic and foreign researches often use the engineering geological analysis method,which is analyzed from natural history analysis method and engineering analogy method,to analyze the specific conditions of structural surface,lithology and slope,etc.,as well as the quantitative analysis method based on the principle of mechanics and the progressive destruction method.based on the practical situation of foundation pit engineering of power plant project in fuping district,this paper makes a detailed analysis of the case of power plant project in fuping district by referring to existing methods of slope stability analysis both at home and abroad.Use of simplicity and high maneuverability of limit equilibrium analysis method(including: Sweden article distribution,Jane cloth method,bishop method,the transfer coefficient method)and finite element analysis method is used for calculation,and the merits and demerits of the two kinds of calculation methods,scope,and authenticity are analyzed in detail and the comparative study.in this paper,the common definition method of slope stability coefficient is studied,and new definition methods of slope stability coefficient such as anti-sliding force method,main thrust force method,comprehensive displacement method and surplus displacement method are proposed.The calculation method,calculation steps,applicable conditions,advantages and disadvantages of foundation pit slope stability are analyzed.on this basis,the stress solution closely related to boundary stress is first introduced to solve the actual stress characteristics.Then the model is simplified to calculate the pit slope of the power plant project.the foundation bearing capacity of the project is evaluated based on the geological exploration report,project engineering conditions and underground water burial conditions,and the geological exploration conclusions are drawn.The stability of foundation pit slope of power plant project in fuping district is studied comprehensively by combining various research data.Meanwhile,the feasibility of new method is verified by using new method to calculate actual engineering cases of power plant project in fuping district.at last,the slope soil in the engineering example is calculated by using the Swedish circular arc division method,and the minimum safety factor Ksjmin is obtained.Then the geological exploration data and the unknown number of slope calculation are input into the EXCEL program to obtain the data results.The data results are compared with the calculated results of the new method.