Study On Instable Mechanisms Of Highway Embankment-Retaining Wall And Application Of Reinforcement Techniques

In hilly country and mountainous areas, embankment-retaining wall, is a very common retaining structure. According to the in-situunstable situations of an heavy retaining wall of one across railway bridge of No.107 national highway, located in Luohe city Henan province, a systematic study on instable mechanisms of embankment-retaining wall under dynamics loading condition and application of reinforcement techniques was carried throughly in the thesis, and some key results of which as follows:1. Based on the properties of highway dynamics loading, the study method about in stable mechanism of soil-massess lope under highway dynamics loading was brought on.2. Instable mechanisms of embankment-Retaining wall under the random highway loading condition were studied. Three parameters were introduced into the program of instable mechanism analysis. Carrying the critical anti-sliding force and anti-sliding moment as analytical formulas, and taking into the limit equilibrium condition of wall-soil system, two equations were educed. By numerical simulation and the equations, the practical engineering was analyzed. The result shows that the angles of sliding wedge of subgrade soil are almost in the same value with the different measures3. Consulted the mechanism of cement-grouting, and by use of the Mohr-Coulomb failure criteria(yield function), the yield functions, which under the active and passive earth pressure condition were deduced.4. Taking the different analysis methods, the mechanism of the loading transfering and the displacement of anchor were explored. The formulation about relation between the anchor shear displacement and the anchoring -part length was deduced according with the engineering facts.5. A kind of construction technology, part-reinforceing steel mesh of the shotcrete mesh was presented and put in use after analysisng the force condition of the shotcrete mesh.6. By use of the proposal design parameters and the materials properties, the numerical analysis model of PLAXIS was founded. Using the numerical model, the stability variations(displacement of side direction) of reinforcement structures were analyzed. The analysis shows the different types of reinforcement structure were integrated and formulated an organic entirety, and it was a very effective method to reinforce the unstable retaining wall and soil-massess lope under dynamics loading condition.