黄土区涵洞病害发育特征研究

Study of Characteristics for Defects of Expressway Culvert in Loess Area

为探究黄土地区高速公路涵洞的病害发育特征及其成因,对青海东部黄土地区兰西高速公路、平阿高速公路、宁互一级公路和西湟高速公路的涵洞病害进行了现场调查和室内分析,重点对兰西高速公路涵洞病害特征进行了研究。结果表明,黄土地区高速公路涵洞病害类型主要有涵洞下沉、基础开裂、护锥翼墙沉降开裂或倾斜错位、涵节错位或填缝脱落、内部积水淤塞、进出口积水淤塞、涵背填土塌陷、涵顶路面开裂等8类。根据各类型病害的发育程度,首次将病害分为一般、严重和很严重3个等级,有助于客观、准确、快捷地评价涵洞病害实际发育程度。研究成果可为黄土地区高速公路涵洞病害勘察和防治提供理论指导和科学依据。

In order to research the disease characteristics of expressway culvert as well as causes of formation in loess area, based on the field investigations that have been carried out in Qinghai Province and document materials, the characteristics and its causes of expressway culvert disease have been analyzed in details. The results show that the types of culvert disease in loess area mainly include culvert sinking, foundation fissure, subsidence cracking or dislocation of wing wall, culvert section mismatch or caulking falling off, internal water silting, lateral water silting, filling collapse behind culvert, pavement cracking on the top of culvert. Each disease type of culvert can be divided into general, serious and very severity according to the development degree, which may be useful for the evaluation of culvert disease objectively, accurately and quickly. The research results can provide theoretical guidance and scientific basis for field investigation and prevention measures of expressway culvert disease in loess area.