寒冷地区应用快速检测掺灰技术的粘性土路基施工工艺

主要论述寒冷地区应用快速检测掺灰技术的粘性土路基施工工艺的原理、施工工艺流程及操作要点、实际应用、效益分析等,对彻底解决寒冷地区粘性土路基的水稳定性、冻稳定性、掺灰施工和控制工后沉降具有实际意义。

重复荷载作用下粘性路基土的永久变形预估

利用室内重复荷载三轴试验,研究了在含水量、压实度和偏应力影响下粘性路基土的永久变形特性,并以Tseng-Lytton路基土永久变形预估模型形式为基础,对Tseng-Lytton模型进行了改进和标定,建立了粘性路基土的永久变形预估模型;最后利用分层应变总和法,并结合一个典型粒料柔性基层沥青路面结构实例,计算了路基土的永久变形量.

粘土路基开展设计线法施工的经验与成果

介绍了粘性土路基在施工中开展设计线法施工的一些经验和取得的成果。

季冻区高含水量粘性土冻融特性的研究

高含水量粘性土作为路基填料由于成因复杂，加上具有很强的区域特性，导致土性差异较大。依托于绥北高速公路建设工程，结合室内试验结果与现场调研资料，对黑龙江省高含水量粘性土的冻融特性进行分析。

An oversize correction method of dry density for non-cohesive soils filling the embankment of high-speed railway

Non-cohesive soils have been widely used in construction of high-speed railway for their excellent physical and mechanical properties,and the determination of maximum and minimum dry density of such soils containing oversize particles is an important topic.In this study,the influence of oversize particles on dry density of non-cohesive soils is investigated by packing tests.Test results show that oversize particles will make"extra"voids around their surfaces,which increase significantly if the size ratio of oversize material to matrix material is not very big.The dry density of the total material will be overestimated by Elimination Method due to the omission of the"extra"voids.Thus,a geometric model is proposed by which the"extra"voids can be taken into account,and a new oversize correction method for non-cohesive soils is developed.Test results confirm the applicability of this method on the condition of oversize fraction being less than 40%by mass.