不同初始条件下高液限土的力学特性研究

通过直剪试验和无侧限抗压强度试验,研究不同含水率和压实度条件下高液限土的抗剪强度、饱和前后的无侧限抗压强度及其变化规律等。结果表明:高液限土在最优含水率和塑限附近,粘聚力下降幅度明显增大;低含水率时,在水的作用下强度急剧降低,含水率越大,饱和后强度衰减越小;低含水率、高压实度时,土体强度能完全满足路基规范要求。

Study on mechanical properties of high liquid limit soil underdifferent initial conditions

Shear strength and unconfined compressive strength pre and after saturation of high liquidlimit soil in different water content and compactness,were studied by the direct box shear test and unconfinedcompression strength test.The results show that the decrease amplitude of cohesion of highliquid limit soil increase apparently nearby the optimum water content and plastic limit;the strength ofsoil reduces sharply on the action of water in low water content and the greater the moisture content,the smaller the strength after saturation decayed;the strength of soil can completely fit the subgradecode in the low water content and high compactness.