基于点荷载的山皮石强度研究

Research on the Strength of Hill-skill Stone Based on Point Load

山皮石作为路基材料时具有强度高、透水性好、价格低廉的优势。对山皮石试样分别进行天然、饱和状态下的点荷载试验,基于点荷载试验对山皮石的强度进行分析,讨论了饱和对山皮石强度的影响。结果表明:山皮石强度离散型较大但整体强度较高,试样中有75%的强度达到38.9MPa以上;山皮石强度随截面面积的增大先增大后减小,截面面积在1500m^(2)左右时强度较高;山皮石的软化系数一般小于0.75,属于易软化岩石。

As the subgrade material, the hill-skill stone has the advantages of high strength, good water permeability and low price. The point load tests on the samples of hill-skill stone are respectively carried out under natural and saturated conditions. The strength of hill-skill stone is analyzed based on the point load tests, and the influence of saturation on the strength of hill-skill stone is discussed. The results show that: the discrete strength of hill-skill stone is larger, but the overall strength is higher. The strength of 75% in the samples can reach over 38.9MPa;the strength of hill-skill stone increases first and then decreases with the increase of the section area, and the strength is higher when the section area is about 1500 m^(2);the softening coefficient of hill-skill stone is generally less than 0.75, which belongs to easily softened rock.