A Study On Stability Reliable Degree Of Anchoraged Rock Mass & Soil Mass And Its Application

This paper research stability reliable degree of the rock mass and soil mass underanchor state. Seeing that routine stabilizes analytical method, for instance " the dividelaws", " limit balanced law"etc., Set upa on the basis of a large amount of assumption andsimplifying, besides, at study on mechanism, finally anchor function of anchor is tochange stress and strain state of the slippery body. To anchored rock and soil mass, ifanalyses anchor effect on the angle of stress and strain state, The anchor under prestressplays a role in offering the additional stress of the axial mainly, The main function of theanchor under un-prestress is to offer axial retraining on the slippery body. In this way,limit state function of the anchor under prestress and the one under un-prestress is verydifferent, This determines reliable degree of anchored body is entirely different too. Sothe limit state function that determines according to the determinacy theory of the routineis inaccurate; Though the result of FEM analyses is relatively accurate, but must bethrough very many and miscellaneous with trifles computational process, it isunsatisfactorily to use directly to reliable degree analysis. So, the focal points of researchin the paper is to determine rational steadily calculate model of anchored mass and soilmass. This model must accurately simulation the stresses and strain state characteristic ofanchored rock mass and soil mass, must be could guarantee displacement coordinatebetween rock & soil mass and anchor, must be could reflect the state of prestress andun-prestress impacting on reliable degree, on the other hand, must be simple and moreconvenient benefit to analysis and calculate reliable degree. (1) As an alone mechanics body,mechanism the reliable degree of anchor isanalyzed in this paper, the reliable degree of anchor is divided into design phase andconstructs stage. To the research ofreliable degree ofdesign phase, mechanism of anchorisanalyzed by theplasticity theory andthe finite element method, new type state functionisdefined. To the research ofreliable degree of constructs stage, on the basis of testing thedata analysis at the scene, set up the probability model of mathematics, rationallydetermine the reliable degree ofanchor. (2) To anchored soil mass, considering the deficiency in theory of limit balancedways:⑴Unable to imitate the relations of load on soil and anchor's displacement;⑵Unable to imitate the relations of anchor's strength and soil's displacement, This thesis III英文摘要determine a stability calculate model synthesizing limit theory of analysis, dividing law,limit balanced law , This model coordinate the possible move and destroy of soil mass,the extensions of stock anchor, Through optimizing and change and take the place, canrational simulations the emergency stress mode of anchored soil mass, can carry onrelevant conveniently calculating reliable degree, at the same time, it can simulationlayers of soil mass and the state of prestress impactingon reliable degree. (3) To anchored rock mass, this thesis analyze separately by dividing the rock massinto the ones with obviously move face and the one with intermittent structure face. Tothe rock mass with obviously move face, the mechanics is studied firstly, and this textpoints out routine analyses model can't rational simulation even distribution of stress andgradually destroying state on contact surface. On the basis of this, according to theminimum principle of potential energy, determine reliable degrees analysis models withsynthetically considering sliding surface displacement, sliding surface graduallydestroying, and coordinating between sliding surface displacement and anchor strength.To anchored rock mass with intermittent structure face, this paper adjust reliable degreeto calculate properly on the basis of routine model, Have analyzed the state of the anchorimpactingon rock body steady reli...