Stability Analysis Of High Loose Slope

In recent years,with the rapid development of economy and the scope of urban is expanding ceaselessly,the construction lands have become increasingly tense.This makes the urban construction projects in the mountainous area and hilly region inevitably face more and more problems.Slope safety problem can not be ignored.Under the natural condition,the slope is in a stable state after long-term stress adjustment and balance;in the engineering construction,the original stress balance is destroyed,such as digging,blasting and mechanical vibration,so that the inside of the slope can enter the stress adjustment again.In particular,the man-made loose accumulation high slopes are more prone to accidents,resulting in serious threat to personal and property safety.Therefore,exploring for loose accumulation of high side slope stability evaluation methods and making effective evaluation,before the accident more accurate timely confirm slope risk,control and protection,so as to avoid possible casualties and property losses.Loosely piled high slope instability is a process of long-term or burst,its stability is influenced by many factors,for inside and outside two aspects:internal factors mainly includes slope shape,stratum structure and distribution,rock and soil physical and mechanical characteristics such as;external factors include where the development of the regional climate and hydrological conditions,vegetation,earthquake intensity,human factors,etc.,the weights of these factors are also different.The integrated a variety of factors,select Dalian area of a typical loose stacked high slope as the research object,collect research data,combined with field and laboratory tests,through two-dimensional limit equilibrium analysis,three dimensional finite element analysis and innovation grey system evaluation method,three kinds of evaluation methods of slope stability,models are established separately were calculated and analyzed,to make qualitative and quantitative analysis and judgment.Finally,the evaluation results obtained by comparison and application of different evaluation methods,summarizes the advantages of three kinds of evaluation methods,defects and adaptability,it is concluded that for the loosely packed high fill evaluation of slope stability evaluation methods selection and application process of suggestions.The main research contents of this paper are as follows:Collect information about the slope stability analysis and evaluation,summarize the development course and research results in this field,the selection of suitable to loose accumulation evaluation method of slope stability is evaluated and comparative study.Select several two dimensional limit equilibrium calculation method,which commonly used in engineering.Clear the hypothetical conditions,calculation process and accuracy of each method,obtained from the evaluation results were compared,analysis to determine the applicable in the loose accumulation of high side slope stability evaluation method and bad method will appear the problem.Using the latest finite element software NX Midas/GTS,to achieve a more accurate three-dimensional finite element analysis.In the three-dimensional numerical simulation of the slope,the slope is roughly built into a simple geometric form,but in the actual conditions,the shape and the rock structure of the slope is more complex.In this paper,a more realistic three-dimensional model of slope is established by using the actual measurement of the elevation point of the top elevation of the slope.In engineering practice,the stability evaluation of large scale slope is often required.Before the detailed evaluation,using a rough evaluation can be used to specify the key points for the next evaluation,reduce the project cost and improve the efficiency of the project.Based on Grey system,establish evaluation model,index system and weight,and explore the feasibility and adaptability of grey evaluation in application of loose accumulation slope stability evaluation.