| Many factors affect the engineering of incline's shoring,the consanguineous mutuality with local condition, stratumal condition, hydrological and geological condition, constructional manage, local inspect and the construction of near structural field,so have many hidden trouble. At the same time, the incline's shoring is a complicated and related with numerous subjects's study, involve the soil mechanics, hydrological geology, engineering geology , structural mechanics, constructal technique etc. knowledges. So, the problem that it request to study is more, not only need to study the intensity of the soil, transmutation, the stability problem, but also need to study the reciprocity of the soil and the shoring structure, Still need to study the influence and restrict of the constructional method and the construction process upon the rock soil- check bodies and supervisions of the feedback of the soil body transforms to the shoring structure, the method of design and account.The paper studied the mechanics condition, the shape of sliding plane when soil-nail destroyed and the pass law of soil-nail in tensite force. It studies systematically some methods which are applied to analyze the whole stability safety coefficient. Fs of soil-nail shoring. And imitate the stability analysis of the mineral incline with logarithmic spiral sliding surface , founded the global stable safe coefficient of Fs of model and then the express of Fs is deduced. Some optimal design are compared. It mainly introduced the most dangerous sliding surface and the homologous minimum safety coefficient Fs,min of soil-nail bracing can be realized with the computing program of the genetic algorithm. Finally some parameters which are influential in Fs,min are analyzed with an example of the project of the south incline reinforce of the building of KAI YAUN in YANG QUAN , and some valuable conclusions are obtained from the analysis for the design and construction of soil-nail bracing.
|
PDF Full Text Request