论文部分内容阅读
通过室内调配不同含水率的重塑淤泥,利用研制的室内微型高精度十字板剪切仪,研究了含水率对重塑淤泥重塑不排水强度的影响。该仪器的剪切强度分辨率为1 Pa,经试验验证,仪器测量结果的稳定性较好,但对强度越低的重塑淤泥试样其测量值的相对平均偏差越大。淤泥含水率对淤泥的不排水强度有显著影响,不排水强度均随含水率/液限的增大而减小,含水率/液限越大,不排水强度下降趋势越小。相同的含水率/液限时,不同种类的重塑淤泥的不排水强度比较接近。在双对数坐标中,不排水强度均随含水率/液限的增大而线性减小。由试验数据得出了不同种类重塑淤泥的不排水强度与含水率/液限之间的关系式,利用该关系式可以求得每一种重塑淤泥任意含水率下的不排水强度。文中的试验值大于洪振舜提出的关系式的计算值。当IL>2时,试验值与Locat和Leroueil提出的关系式的计算值基本吻合,当IL<2时,试验值大于Locat和Leroueil提出的关系式的计算值。
The effect of moisture content on the undrained strength of reshaped sludge was studied by means of indoor remodeling sludge with different water content and indoor miniature high precision cross-cut shearing instrument. The instrument has a shear strength resolution of 1 Pa. The experimental results show that the stability of the instrument is good, but the relative average deviation of the measured values of remodeled sludge samples with lower strength is larger. The moisture content of silt has a significant impact on the undrained strength of the silt. The undrained strength decreases with the increase of the water cut / liquid limit. The greater the water cut / liquid limit, the less the undrained strength decreases. The same moisture content / liquid limit, the different types of remodeled sludge undrained strength is relatively close. In double logarithmic coordinates, the undrained strength decreases linearly with increasing water cut / liquid limit. Based on the experimental data, the relationship between the undrained strength and the water cut / liquid limit of different types of remodeled sludge is obtained. Using this relation, the undrained strength of any remodeled sludge at any water cut can be obtained. The experimental value in this paper is larger than the calculated value of the relation formula proposed by Hung Chun-shun. When IL> 2, the experimental values agree well with those calculated by Locat and Leroueil. When IL <2, the experimental values are greater than those calculated by Locat and Leroueil.