高速公路路基加筋红层泥岩填料三轴试验研究  

Triaxial Test Study on Reinforced Red-bed Mudstone for Highway Embankment

作　　者：姜兵[1] 卢萍[1] 韩志型[1] 

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《施工技术》2012年第9期47-49,62,共4页Construction Technology

基　　金：国家自然科学基金项目(10602048);四川省自然科学基金资助项目(2009YJ0060)

摘　　要：采用三轴试验主要从施工压实度方面对红层泥岩填料的物理力学特性进行研究。试验表明,压实度的提高虽然可以提高素土体的强度,但同时也降低其延性,加入土工化合物后可增加土颗粒的侧向约束、提高其围压达到改善土体路用性能的目的,同时加筋后不仅大幅提高了红层泥岩填料的峰值强度与残余强度,而且增大了峰值应变的区间并改变了土体的应力-应变模式。结合现行施工规范分别给出红层泥岩素填料及加筋填料合理的施工压实度,为确定高速公路施工压实度提供了可靠的数据支持。Physical properties of red-bed mudstone were studied using triaxial test with the degree of compaction as the main investigated parameter.Test result shows that by increased the degree of compaction,the plain soil strength can be increased as well,but ductility will be decreased.By adding geo-symthetic materials,the confining pressure of the grains can be increased and as a result,pavement performances can be improved.The peak strength and residual strength of the red-bed rock can be increased significantly by the reinforcement.The reinforcement also changes the stress-strain mode and increased the duration of the peak strain.With reference to the current codes,the reasonable degree of compaction of the plain soil and the reinforcing filler are suggested.The work presented provided reliable support to the determination of the degree of compaction in highway construction.

关 键 词：公路工程 路基 红层泥岩 土工合成材料 试验 三轴试验 压实度 

分 类 号：TU449[建筑科学—岩土工程]