勉宁高速公路挖方路段排水设计关键技术研究  

Research on the key drainage technique in the cut section of Mianxian-Ningqiang Highway

作　　者：苏凯[1] 徐希娟[2] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海200092 [2]西安公路研究所,陕西西安710064

出　　处：《合肥工业大学学报（自然科学版）》2006年第1期94-97,共4页Journal of Hefei University of Technology：Natural Science

摘　　要：勉宁高速公路地处秦巴山区,沿线雨量充沛,挖方路段较多,部分路段路基地下水位过高,如不加以处治,势必会导致沉陷等各种道路病害。文章分析了地下水位对路基、路面结构性能的影响;结果表明地下水位过高会使路基湿度增大、模量降低,导致路表弯沉、面层层底拉应力增大;并在试验研究的基础上,提出在山体一侧设置盲沟,该措施可以有效地降低地下水位,确保路基的承载力。Mianxian-Ningqiang Highway lies in the Qin-Ba mountain area which has excessive rainfall and there are many cut sections. If the subgrade water level becomes higher, all kinds of road damage, such as depression, will be induced. In the paper, the effect of underground water on road performance is analyzed. The results indicate that higher water levels will cause the subgrade humidity to become big and the modulus small and then deflection and tensile stress will become bigger. On the basis of testing, it is put forward that setting blind drains can make the water level decline markedly and guarantee the subgrade bearing capacity.

关 键 词：道路工程 排水设计 最佳含水量 拉应力 弯沉 盲沟 

分 类 号：U417.3[交通运输工程—道路与铁道工程]