| This study first of all from the Xiangjiaba Hydropower Station Dam basic geological conditions of dam site. According to its main geological structure characteristics of the development of the dam foundation is divided into6regions. For the lithology, structure of the development degree, rock mass integrity, strength of rock mass classification. At the same time, according to the size and material composition on the structure surface also classify. Secondly, in structural plane of rock mass classification and the classification of rock mass based on. On rock mechanical test results were classified, by using the method of least squares, small average method, and slope method, fractile method and fuzzy random method and other statistical methods were analyzed and compared. The difference between test results and reliability, obtain test results of the standard value. As a result of Xiangjiaba Hydropower station dam foundation by deep gravel covered with large rocks, the field test conditions. Therefore, use of the rock mass is established the test results, the mechanical parameters of rock mass and rock mass characteristics of the correlation between deformation modulus and wave velocity of rock mass, including (EO-Vp), modulus and the quality index (EO-RQD), shear strength of rock mass and velocity (f’Vp), shear strength and quality index (C’RQD), soft interlayer shear strength and clay content, water content, void ratio, dry density and other physical parameters (f-Mc, W, e, Pd and c-Mc, Pd). for the wide (about500m) bed dam base rock of performance evaluation and the parameters, find out the reasonable and feasible way finally, the test results on the basis of statistical analysis, the combinationof domestic and foreign similar engineering experience, in accordance with therelevant rules requirements, using geological analogy method namely the experiencemethod proposed dam foundation rock and structure types of mechanics parameter. |
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