【摘要】 介绍了对弱膨胀土路堤采用“膨胀土+石灰土+土工网”分层交错填筑的综合处治方法。通过现场试验测定了不同分层组合填筑结构型式土基的承载力和回弹模量,并分析了二者存在差异的原因。结果表明,采用弱膨胀土-石灰土这种结构作为膨胀土路堤的治理方案和采用弱膨胀土-石灰土-土工这种复合结构型式作膨胀土路堤的包边处理是科学合理的。只要各结构层施工质量能够满足设计要求,采取这种结构形式,一方面可以充分利用沿线的弱膨胀土材料,另一方面又可以充分利用弱膨胀土自身的强度优势,保证路堤的稳定。更多还原

【Abstract】 The method of backfilling expansive soil, lime soil and geonets in staggered layers used in the disposal of weak expansive soil embankment is introduced. By the in-situ tests, the bearing capacity and rebound modulus of soil basement in different layering combinations are obtained and the differences among different combinations are analyzed and discussed. The results show that the structure of weak expansive soil plus lime soil; and the compound structural type of weak expansive soil, lime soil and geonets wrapped in the soil embankment are scientific and reasonable in the disposal of expansive soil embankment. With this structural type, not only the expansive soil along the road but also their strength can be fully utilized only when the requirements of design are satisfied by the construction quality of each structural layer.更多还原