Study On Safety Assessment In Retaining Wall Stability

It is very important to study the stability of roadbed slope structure in highway engineering,which is one of the key problems in roadbed slope research.At present,the uncertainties of the parameters in the structure were neglected in the stability evaluation method of the roadbed slope,which leads to the unknown safety of the roadbed slope during the actual use.In order to solve the problem of stability assessment of roadbed slope,this paper proposes a method to evaluate the stability coefficient of roadbed slope based on inverse reliability analysis theory considering the randomness of each design variable.This paper was studied mainly from the following aspects:1.Based on the inducting and analyzing of existing research results of structure reliability evaluation,due to not considering the uncertainties in parameters of existed safety assessment of roadbed slope,the safety factor assessment method based on inverse reliability theory was proposed;2.Combining the deterministic analyzing model of roadbed slope and the inverse reliability theory,a new method was proposed to calculate the safety factor,which was easily understood in engineering so that it conveniently used for engineers;3.Taking the example of roadbed slope as the research object,safety factors of overturning and slippage of roadbed slope were calculating using the inverse reliability,as well as parameter sensitivity analysis,the results of which were compared with the deterministic results,which indicates that ignoring parameters uncertainty will produce overestimation of roadbed slope stability safety level.Compared to the deterministic safety factor method,the proposed method considers the randomness of each design variable.The safety factor based on the inverse reliability theory analysis quantitatively express the safety of the roadbed slope structure,making the analysis result more realistic and science.