崩岗区岩土固结特性试验研究

Experimental investigations on consolidation characteristics of soil in collapsing erosion area

以赣州崩岗区土为研究对象,通过控制重塑土样的干密度及石灰的掺加量制备不同状态下的试样,并进行室内固结试验,研究不同干密度和不同石灰的掺加量对崩岗土的压缩特性的影响,探讨了崩岗土的固结特性。通过分析实验数据可知,试样的初始干密度和石灰的掺加量对土的应力-应变曲线特征有着显著影响,崩岗土的应力应变曲线符合双曲线模型,添加石灰可以提高崩岗土的初始切线模量,提高土体的抗剪强度,减少土体最终压缩量。

Taking the soil in collapsing erosion area of Ganzhou as the research object,a series of tests for characteristics of consolidation behaviors were carried out on soil in collapsing erosion area. The effects of different dry density and different amount of lime on the compressive properties of the soil were studied. By analyzing the experimental data,the results showed the initial dry density and lime mixing amount have significant effects on consolidation behaviors. The stress-strain relation of the collapse soil essentially accorded with hyperbolic model. The initial tangent,modulus shear strength and compressive strength of soil were improved by adding lime. The final settlement of soil was reduced.