各类土体基床系数取值(国外英文资料).doc

各种土体基床系数取值(国外英文资料) Various soil base bed coefficients are evaluated Various soil base bed coefficients are evaluated , Bed coefficient: the ratio of the normal pressure to the corresponding displacement of a certain point in the elastic half space foundation of the base bed reaction coefficient. Its also called the winkle coefficient What is the basis of the bed reaction coefficient? This should be winkler in 1867 winkler foundation model (beam on elastic foundation) in the bed reaction coefficient, winkler hypothesis: the pressure of the foundation in office a little intensity is proportional to the point of ground subsidence in s p, p = ks, the proportion coefficient k is called the bed reaction coefficient, hereinafter referred to as bedding coefficient. It is to divide the foundation soil into a lot of earth columns, and then replace it with a separate spring, which is the spring stiffness, as the property owner put it. Bed coefficient of determination is complicated, however, it is not a pure representation of soil mechanics calculation of indicators, also affected by the size and distribution of base pressure, compressibility, soil layer thickness, the influence of adjacent load and so on. Some books are recommended based on the basis of estimated settlement or load test results. Value of K can refer to the instruction of the table, in the same type of soil, large value relatively hard soil, soft soil of little value, if consider to cushion the impact of K value is more desirable and when there are a number of soil layer, should by the weighted average of the deflection of the soil. The change of K value has little effect on the uniform force of the load, but it has a certain effect on the internal force when the load is not uniform. The K value should be adjusted appropriately and the K value of the desired internal force and deformation should be chosen, and the vertical displacement should not be negative. [source] gu xiaolu et al. Foundation and foundatio